U.S. patent application number 16/646153 was filed with the patent office on 2020-07-09 for electronic device, wireless communication method and computer readable storage medium.
This patent application is currently assigned to Sony Corporation. The applicant listed for this patent is Sony Corporation. Invention is credited to Jianfei CAO, Dongru LI, Wenjing REN, Xiaofeng TAO, Jin XU, Hang YANG.
Application Number | 20200220605 16/646153 |
Document ID | / |
Family ID | 67218862 |
Filed Date | 2020-07-09 |
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United States Patent
Application |
20200220605 |
Kind Code |
A1 |
XU; Jin ; et al. |
July 9, 2020 |
ELECTRONIC DEVICE, WIRELESS COMMUNICATION METHOD AND COMPUTER
READABLE STORAGE MEDIUM
Abstract
An electronic device includes a processing circuit configured
to: receive information about a number N of candidate transmit
beams from a user device, wherein N is an integer greater than 1;
select from the N candidate transmit beams a transmit beam for
sending downlink information to the user device; and determine, on
the basis of the selected transmit beam, a transmission
configuration indication (TCI) state, and send the TCI state to the
user device. The electronic device, the wireless communication
method and the computer readable storage medium enable a
network-side device to notify the user device of the information
about transmit beams. In this way, the user device can determine,
according to the transmit beam of the network-side device, a proper
receiving beam so as to improve the gain of the system.
Inventors: |
XU; Jin; (Beijing, CN)
; LI; Dongru; (Beijing, CN) ; REN; Wenjing;
(Beijing, CN) ; YANG; Hang; (Beijing, CN) ;
TAO; Xiaofeng; (Beijing, CN) ; CAO; Jianfei;
(Beijing, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Sony Corporation |
Tokyo |
|
JP |
|
|
Assignee: |
Sony Corporation
Tokyo
JP
|
Family ID: |
67218862 |
Appl. No.: |
16/646153 |
Filed: |
January 4, 2019 |
PCT Filed: |
January 4, 2019 |
PCT NO: |
PCT/CN2019/070379 |
371 Date: |
March 11, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H04B 7/0695 20130101;
H04L 5/0051 20130101; H04B 7/0617 20130101; H04B 7/06 20130101;
H04W 56/001 20130101; H04B 7/0626 20130101; H04B 7/08 20130101;
H04B 7/086 20130101 |
International
Class: |
H04B 7/06 20060101
H04B007/06; H04B 7/08 20060101 H04B007/08; H04L 5/00 20060101
H04L005/00; H04W 56/00 20060101 H04W056/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 11, 2018 |
CN |
201810026604.1 |
Claims
1. An electronic equipment comprising a processing circuit
configured to: receive, from a user equipment, information about N
candidate transmitted beams, wherein N is an integer greater than
1; select, from the N candidate transmitted beams, a transmitted
beam for transmitting downlink information to the user equipment;
and determine a Transmission Configuration Indication TCI state
according to the selected transmitted beam, and transmit the TCI
state to the user equipment.
2. The electronic equipment according to claim 1, wherein the
processing circuit is further configured to: determine
identification information of the N candidate transmitted beams
according to the information about the N candidate transmitted
beams.
3. The electronic equipment according to claim 2, wherein the
processing circuit is further configured to: determine order
information of the N candidate transmitted beams according to the
information about the N candidate transmitted beams; and select a
transmitted beam for transmitting downlink information to the user
equipment according to the order information of the N candidate
transmitted beams.
4. The electronic equipment according to claim 2, wherein the
processing circuit is further configured to: determine channel
quality information between all or a part of candidate transmitted
beams in the N candidate transmitted beams and the user equipment
according to the information about the N candidate transmitted
beams; and select a transmitted beam for transmitting downlink
information to the user equipment according to the channel quality
information between the all or a part of candidate transmitted
beams and the user equipment.
5. The electronic equipment according to claim 1, wherein the
processing circuit is further configured to: determine a beam for
transmitting a Synchronization Signal Block SSB corresponding to
the selected transmitted beam; and determine a TCI state to be
transmitted to the user equipment according to a mapping relation
between the TCI state and the beam for transmitting the SSB.
6. The electronic equipment according to claim 5, wherein a
radiation range of the selected transmitted beam is within a
radiation range of the beam for transmitting the SSB corresponding
to the selected transmitted beam.
7. The electronic equipment according to claim 5, wherein the
processing circuit is further configured to: after an initial
access is completed, establish a mapping relation between the TCI
state and the beam for transmitting the SSB; and transmit, to the
user equipment, the mapping relation between the TCI state and the
beam for transmitting the SSB.
8. The electronic equipment according to claim 1, wherein the
processing circuit is further configured to: periodically receive,
from the user equipment, the information about the N candidate
transmitted beams, or send a request to the user equipment to
obtain the information about the N candidate transmitted beams.
9. (canceled)
10. An electronic equipment comprising a processing circuit
configured to: receive, from a network side device, a Transmission
Configuration Indication TCI state; and determine a received beam
for receiving downlink information from the network side device
according to the TCI state.
11. The electronic equipment according to claim 10, wherein the
processing circuit is configured to: transmit, to the network side
device, information about N candidate transmitted beams for
selecting, by the network side device, a transmitted beam for
transmitting downlink information to the electronic equipment from
the N candidate transmitted beams, and determine the TCI state
according to the selected transmitted beam, wherein N is an integer
greater than 1.
12. The electronic equipment according to claim 11, wherein the
processing circuit is further configured to: determine the N
candidate transmitted beams according to channel quality between K
transmitted beams of the network side device and the electronic
equipment, wherein K is an integer greater than or equal to N.
13. (canceled)
14. The electronic equipment according to claim 11, wherein the
processing circuit is further configured to: periodically transmit
the information about the N candidate transmitted beams to the
network side device; or transmit the information about the N
candidate transmitted beams in response to a request of the network
side device.
15. The electronic equipment according to claim 11, wherein the
information about the N candidate transmitted beams comprises
identification information of the N candidate transmitted beams,
and wherein the processing circuit is further configured to express
identification of the N candidate transmitted beams in any means
of: expressing the identification of each of the N candidate
transmitted beams by using binary coding; expressing the
identification of the N candidate transmitted beams by using a bit
map; expressing the identification of a reference candidate
transmitted beam in the N candidate transmitted beams by using the
binary coding, and expressing the identification of other candidate
transmitted beams in addition to the reference candidate
transmitted beam in the N candidate transmitted beams by using
binary coding of a difference value between identifications of
other candidate transmitted beams and the reference candidate
transmitted beam; and according to a first mapping table and an
unordered combination of the N candidate transmitted beams,
determining combination identification corresponding to the
combination, and expressing the identification of the N candidate
transmitted beams by using the combination identification, wherein
the first mapping table stores a mapping relation between the
combination of the N candidate transmitted beams selected from the
K transmitted beams of the network side device and the combination
identification, wherein K is an integer greater than or equal to
N.
16. (canceled)
17. The electronic equipment according to claim 15, wherein the
information about the N candidate transmitted beams comprises order
information of the N candidate transmitted beams.
18. The electronic equipment according to claim 17, wherein the
processing circuit is further configured to: according to a second
mapping table and an ordered arrangement of the N candidate
transmitted beams, determine arrangement identification
corresponding to the arrangement; and express identification and
order of the N candidate transmitted beams by using the arrangement
identification, wherein the second mapping table stores a mapping
relation between the arrangement of the N candidate transmitted
beams selected from the K transmitted beams of the network side
device and the arrangement identification, wherein K is an integer
greater than or equal to N.
19. The electronic equipment according to claim 15, wherein the
information about the N candidate transmitted beams comprises
channel quality information between all or a part of candidate
transmitted beams in the N candidate transmitted beams and the
electronic equipment.
20. The electronic equipment according to claim 10, wherein the
processing circuit is further configured to: determine, according
to a mapping relation between the TCI state and a beam for
transmitting a Synchronization Signal Block SSB, a beam for
transmitting the SSB; and determine a received beam for receiving
downlink information from the network side device according to a
mapping relation between the beam for transmitting the SSB and the
received beam.
21. The electronic equipment according to claim 20, wherein the
processing circuit is further configured to: after an initial
access is completed, receive from the network side device the
mapping relation between the TCI state and the beam for
transmitting the SSB.
22. The electronic equipment according to claim 20, wherein the
processing circuit is further configured to: establish, in the
process of initial access, the mapping relation between the beam
for transmitting the SSB and the received beam.
23.-24. (canceled)
25. A wireless communication method, comprising: receiving, from
user equipment, information about N candidate transmitted beams,
wherein N is an integer greater than 1; selecting, from the N
candidate transmitted beams, a transmitted beam for transmitting
downlink information to the user equipment; and determining a
Transmission Configuration Indication TCI state according to the
selected transmitted beam, and transmitting the TCI state to the
user equipment.
26.-27. (canceled)
Description
[0001] The present application claims priority to Chinese Patent
Application No. 201810026604.1, titled "ELECTRONIC DEVICE, WIRELESS
COMMUNICATION METHOD AND COMPUTER READABLE STORAGE MEDIUM", filed
on Jan. 11, 2018 with the Chinese Patent Office, which is
incorporated herein by reference in its entirety.
TECHNICAL FIELD
[0002] Embodiments of the present disclosure generally relate to
the field of wireless communication, and in particular to an
electronic equipment, a wireless communication method and a
computer-readable storage medium. More particularly, the present
disclosure relates to an electronic equipment as a network side
device in a wireless communication system, an electronic equipment
as a user equipment in a wireless communication system, a wireless
communication method executed by a network side device in a
wireless communication system, a wireless communication method
executed by a user equipment in a wireless communication system and
a computer-readable storage medium.
BACKGROUND
[0003] Beamforming is a signal preprocessing technology based on an
antenna array. Beamforming produces a directional beam by adjusting
weighting coefficients of each element in the antenna array, such
that a significant array gain can be obtained. Therefore,
beamforming technology has great advantages in terms of expanding
coverage range, improving edge throughput and suppressing
interference and the like.
[0004] In downlink transmission, a network side device selects a
transmitted beam from multiple transmitted beams to transmit
downlink information. In a case that a user equipment has multiple
received beams, it is required to select an appropriate received
beam to receive downlink information transmitted by the network
side device, such that a beamforming gain can be obtained. In this
case, the user equipment needs to know related information about
the transmitted beam to determine that which received beam may be
used to receive the downlink information transmitted by the network
side device through the transmitted beam. Therefore, how the
network side device notifies the related information about the
transmitted beam to the user equipment and how the user equipment
determines the appropriate received beam are urgent technical
problems to be solved.
[0005] Therefore, the present disclosure aims to provide an
electronic equipment, a wireless communication method and a
computer-readable storage medium, so as to solve at least one of
the above technical problems.
SUMMARY
[0006] This section provides a general summary of the present
disclosure, instead of a comprehensive disclosure of full scope or
all features of the present disclosure.
[0007] The present disclosure aims to provide an electronic
equipment, a wireless communication method and a computer-readable
storage medium, such that user equipment may determine an
appropriate received beam based on transmitted beam of the network
side device, thereby improving a system gain.
[0008] According to one aspect of the present disclosure, an
electronic equipment is provided. The electronic equipment includes
a processing circuit configured to: receive, from a user equipment,
information about N candidate transmitted beams, where N is an
integer greater than 1; select, from the N candidate transmitted
beams, a transmitted beam for transmitting downlink information to
the user equipment; and determine a Transmission Configuration
Indication TCI state according to the selected transmitted beam,
and transmit the TCI state to the user equipment.
[0009] According to another aspect of the present disclosure, an
electronic equipment is provided. The electronic equipment includes
a processing circuit configured to: receive, from a network side
device, a Transmission Configuration Indication TCI state; and
determine a received beam for receiving downlink information from
the network side device according to the TCI state.
[0010] According to another aspect of the present disclosure, a
wireless communication method is provided. The wireless
communication method includes: receiving, from a user equipment,
information about N candidate transmitted beams, where N is an
integer greater than 1; selecting, from the N candidate transmitted
beams, a transmitted beam for transmitting downlink information to
the user equipment; and determining a Transmission Configuration
Indication TCI state according to the selected transmitted beam,
and transmitting the TCI state to the user equipment.
[0011] According to another aspect of the present disclosure, a
wireless communication method is provided. The wireless
communication method includes: receiving, from a network side
device, a Transmission Configuration Indication TCI state; and
determining a received beam for receiving downlink information from
the network side device according to the TCI state.
[0012] According to another aspect of the present disclosure, a
computer-readable storage medium is provided. The computer-readable
storage medium includes computer-executable instructions, which
when executed by a computer, cause the computer to perform the
wireless communication method according to the present
disclosure.
[0013] Using the electronic equipment, the wireless communication
method and the computer-readable storage medium according to the
present disclosure, the network side device may select a
transmitted beam for transmitting downlink information from N
candidate transmitted beams provided by the user equipment, and
notify information about the selected transmitted beam to the user
equipment through the TCI state. Further, the user equipment may
determine a received beam for receiving downlink information based
on the received TCI state. In this way, the network side device may
provide information about the selected transmitted beam to the user
equipment, such that the user equipment may determine a received
beam corresponding to the transmitted beam used by the network side
device to receive downlink information, thereby improving a system
gain.
[0014] Further applicability will become apparent from the
description provided herein. The description and specific examples
are provided only for illustration rather than limitation to the
present disclosure.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The drawings described herein are for illustrative purposes
only instead of showing all possible implementations, and are not
intended to limit the scope of the present disclosure. In the
drawings:
[0016] FIG. 1 is a schematic diagram showing an application
scenario according to an embodiment of the present disclosure;
[0017] FIG. 2 is a block diagram showing an example of a
configuration of an electronic equipment according to an embodiment
of the present disclosure;
[0018] FIG. 3(a) is a schematic diagram showing contents of
information about N candidate transmitted beams according to an
embodiment of the present disclosure;
[0019] FIG. 3(b) is a schematic diagram showing contents of
information about N candidate transmitted beams according to
another embodiment of the present disclosure;
[0020] FIG. 3(c) is a schematic diagram showing contents of
information about N candidate transmitted beams according to yet
another embodiment of the present disclosure;
[0021] FIG. 4 is a schematic diagram showing a mapping relation
between a TCI (Transmission Configuration Indication) state and
resource identification information of a SSB (Synchronization
Signal Block) according to an embodiment of the present
disclosure;
[0022] FIG. 5 is a signaling flowchart showing that a network side
device and a user equipment obtain a mapping relation between a TCI
state and resource identification information of a SSB according to
an embodiment of the present disclosure;
[0023] FIG. 6 is a block diagram showing an example of a
configuration of an electronic equipment according to another
embodiment of the present disclosure;
[0024] FIG. 7 is a signaling flowchart showing a method for
determining a transmitted beam and a received beam according to an
embodiment of the present disclosure;
[0025] FIG. 8 is a schematic diagram showing a first method for
reporting candidate transmitted beams according to an embodiment of
the present disclosure;
[0026] FIG. 9 is a schematic diagram showing a second method for
reporting candidate transmitted beams according to an embodiment of
the present disclosure;
[0027] FIG. 10 is a schematic diagram showing a third method for
reporting candidate transmitted beams according to an embodiment of
the present disclosure;
[0028] FIG. 11(a) is a schematic diagram showing a first mapping
table according to an embodiment of the present disclosure;
[0029] FIG. 11(b) is a schematic diagram showing a fourth method
for reporting candidate transmitted beams according to an
embodiment of the present disclosure;
[0030] FIG. 12(a) is a schematic diagram showing a second mapping
table according to an embodiment of the present disclosure;
[0031] FIG. 12(b) is a schematic diagram showing a fifth method for
reporting candidate transmitted beams according to an embodiment of
the present disclosure;
[0032] FIG. 13 is a schematic diagram showing a process for
reporting candidate transmitted beams according to an embodiment of
the present disclosure;
[0033] FIG. 14 is a signaling flowchart showing that a user
equipment obtains a mapping relation between resource
identification information of a SSB and a received beam and a
mapping relation between a TCI state and resource identification
information of the SSB according to an embodiment of the present
disclosure;
[0034] FIG. 15 is a flowchart showing a wireless communication
method performed by an electronic equipment according to an
embodiment of the present disclosure;
[0035] FIG. 16 is a flowchart showing a wireless communication
method performed by an electronic equipment according to another
embodiment of the present disclosure;
[0036] FIG. 17 is a block diagram showing a first example of a
schematic configuration of an eNB (Evolved Node B);
[0037] FIG. 18 is a block diagram showing a second example of a
schematic configuration of an eNB;
[0038] FIG. 19 is a block diagram showing an example of a schematic
configuration of a smart phone; and
[0039] FIG. 20 is a block diagram showing an example of a schematic
configuration of a vehicle navigation device.
[0040] While embodiments of the present disclosure may be modified
and replaced in various manners, specific embodiments are shown as
examples in the drawings and are described in detail herein. It
should be understood that description for the specific embodiments
is not intended to limit the present disclosure into a disclosed
specific form, and the present disclosure aims to cover all
modification, equivalents and alternations within the spirit and
scope of the present disclosure. It is noted that throughout the
several figures, corresponding reference numerals indicate
corresponding parts.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0041] Examples in the present disclosure will be described more
fully with reference to the drawings. The following description is
merely exemplary rather than being intended to limit the present
disclosure and applications or purposes of the present
disclosure.
[0042] Exemplary embodiments are provided to make the present
disclosure be exhaustive and fully convey the scope of the present
disclosure to those skilled in the art. Examples of numerous
specific details, such as specific components, devices, and
methods, are set forth to provide a thorough understanding of the
embodiments of the present disclosure. It will be apparent to those
skilled in the art that exemplary embodiments may be implemented in
many different forms without the use of specific details, which
should not be construed as limiting the scope of the present
disclosure. In some exemplary embodiments, well-known processes,
well-known structures, and well-known technologies are not
described in detail.
[0043] The description includes the following sections: [0044] 1.
Description of a scenario; [0045] 2. Configuration example of a
network side device; [0046] 3. Configuration example of a user
equipment; [0047] 4. Method embodiment; and [0048] 5. Application
example.
1. Description of a Scenario
[0049] FIG. 1 is a schematic diagram showing an application
scenario according to the present disclosure. As shown in FIG. 1, 8
transmitted beams of a gNB (a base station in 5th generation
communications system) are shown, which are numbered 0 to 7
respectively, and 4 received beams of a UE (User Equipment) within
coverage range of the gNB are shown, which are numbered 0 to 3
respectively. In a case that the gNB selects a transmitted beam
numbered 5 to transmit downlink data to the UE, the UE should
select a received beam numbered 2 to match the transmitted beam,
such that a better receiving effect can be implemented. In this
case, the UE needs to obtain information related to the transmitted
beam numbered 5 of the gNB and determine that the received beam
numbered 2 is adopted to receive downlink data.
[0050] For such a scenario, an electronic equipment in a wireless
communication system, a wireless communication method performed by
the electronic equipment in the wireless communication system and a
computer-readable storage medium according to the present
disclosure are provided, such that the user equipment may determine
an appropriate received beam based on a transmitted beam of a
network side device, thereby improving a system gain. It should be
noted that, although FIG. 1 shows 8 transmitted beams of the gNB,
the gNB may also have other number of multiple transmitted beams,
and although FIG. 1 shows 4 received beams of the UE, the UE may
also have other number of multiple received beams. That is, the
present disclosure is applicable to all scenarios in which the
network side device has multiple transmitted beams and the user
equipment has multiple received beams.
[0051] Both the network side device and the UE according to the
present disclosure may be included in a wireless communication
system, and the wireless communication system herein may be, for
example, a NR (New Radio) communication system.
[0052] The network side device according to the present disclosure
may be any type of TRP (Transmit and Receive Port). The TRP may
have functions of transmission and reception. For example, the TRP
may receive information from a user equipment and a base station
device and may also transmit information to the user equipment and
the base station device. In one example, the TRP may provide
services to the user equipment and is controlled by the base
station device. That is, the base station device provides services
to the user equipment through the TRP. Furthermore, the network
side device described in the present disclosure may also be a base
station device, such as an eNB or a gNB.
[0053] The user equipment according to the present disclosure may
be implemented as a mobile terminal (such as a smart phone, a
tablet personal computer (PC), a notebook PC, a portable game
terminal, a portable/dongle type mobile router, and a digital
camera device) or an in-vehicle terminal (such as a vehicle
navigation device). The user equipment may also be implemented as a
terminal (that is also referred to as a machine type communication
(MTC) terminal) that performs machine-to-machine (M2M)
communication. Furthermore, the user equipment may be a wireless
communication module (such as an integrated circuit module
including a single chip) mounted on each of the above
terminals.
2. Configuration Example of a Network Side Device
[0054] FIG. 2 is a block diagram showing an example of a
configuration of an electronic equipment 200 according to an
embodiment of the present disclosure. The electronic equipment 200
may serve as a network side device in a wireless communication
system. Specifically, the electronic equipment 200 may serve as a
base station device or a TRP in a wireless communication
system.
[0055] As shown in FIG. 2, the electronic equipment 200 may include
a communication unit 210, a selecting unit 220 and a determining
unit 230.
[0056] Various units of the electronic equipment 200 may be
included in a processing circuit. It should be noted that the
electronic equipment 200 may include one processing circuit or
multiple processing circuits. Further, the processing circuit may
include various separated functional units to perform various
different functions and/or operations. It should be noted that
these functional units may be physical entities or logical
entities, and units of different names may be implemented by a same
physical entity.
[0057] According to an embodiment of the present disclosure, the
communication unit 210 may receive information about N candidate
transmitted beams from a user equipment. N is an integer greater
than 1. According to an embodiment of the present disclosure, the
user equipment may be a user equipment to which the electronic
equipment 200 provides services. For example, in a case that the
electronic equipment 200 is a base station device, the user
equipment may be a user equipment within coverage range of the
electronic equipment 200. In a case that the electronic equipment
200 is a TRP, the user equipment may be a user equipment to which
the electronic equipment 200 provides services.
[0058] According to an embodiment of the present disclosure, the
selecting unit 220 may select, from the N candidate transmitted
beams, a transmitted beam for transmitting downlink information to
the user equipment. The N candidate transmitted beams herein are
transmitted beams of the electronic equipment 200 that may be used
to transmit downlink information. The selecting unit 220 may
select, from N candidate transmitted beams reported by the user
equipment, a transmitted beam for transmitting downlink
information.
[0059] According to an embodiment of the present disclosure, the
determining unit 230 may determine a Transmission Configuration
Indication TCI state based on the selected transmitted beam, such
that the communication unit 210 may transmit the TCI state to the
user equipment.
[0060] It can be seen that, the electronic equipment 200 according
to an embodiment of the present disclosure may select, from N
candidate transmitted beams provided by the user equipment, a
transmitted beam for transmitting downlink information and
determine a TCI state corresponding to the selected transmitted
beam, to notify the user equipment. Thus, the electronic equipment
200 may notify information related to the selected transmitted beam
to the user equipment by using the TCI state, such that the user
equipment may obtain information related to the transmitted beam
selected by the electronic equipment 200, thereby selecting an
appropriate received beam.
[0061] As shown in FIG. 2, the electronic equipment 200 may also
include a decoding unit 240 configured to decode information about
the N candidate transmitted beams.
[0062] According to an embodiment of the present disclosure, the
decoding unit 240 may determine identification information of the N
candidate transmitted beams based on the information about the N
candidate transmitted beams. That is, the decoding unit 240 may
decode the information about the N candidate transmitted beams,
thereby determining the identification information of the N
candidate transmitted beams.
[0063] In the present disclosure, identifications of the
transmitted beams may be represented by identifications of CSI-RS
(Channel State Information-Reference Signal) resources. This is
because a CSI-RS is transmitted using different resources for
different transmitted beams. That is, the transmitted beams
correspond to the CSI-RS resources one to one. Therefore, the
identifications of the transmitted beams may be represented by the
identifications of the CSI-RS resources.
[0064] FIG. 3(a) is a schematic diagram showing contents of
information about N candidate transmitted beams according to an
embodiment of the present disclosure. As shown in FIG. 3(a), the
information about the N candidate transmitted beams may include
identification information of the N candidate transmitted beams. N
is 4 and identifications of the candidate transmitted beams are
represented by the identifications of the CSI-RS resources. In FIG.
3(a), CSI-RS resource 1 represents a CSI-RS resource numbered 1,
CSI-RS resource 2 represents a CSI-RS resource numbered 2, CSI-RS
resource 3 represents a CSI-RS resource numbered 3, CSI-RS resource
4 represents a CSI-RS resource numbered 4, and the 4 CSI-RS
resources correspond to 4 candidate transmitted beams respectively.
According to an embodiment of the present disclosure, the decoding
unit 240 may determine identification information of the N
candidate transmitted beams as shown in FIG. 3(a).
[0065] According to an embodiment of the present disclosure, the
decoding unit 240 may determine order information of the N
candidate transmitted beams based on the information about the N
candidate transmitted beams. That is, the decoding unit 240 may
decode the information about the N candidate transmitted beams,
thereby determining the identification information and the order
information of the N candidate transmitted beams. A manner in which
the user equipment reports the information about the N candidate
transmitted beams may be previously agreed between the electronic
equipment 200 and the user equipment. For example, the electronic
equipment 200 may configure such information for the user
equipment, which will be described in detail hereinafter. In a case
that the user equipment reports the information about the N
candidate transmitted beams in an ordered manner is previously
agreed, for example, the information about the N candidate
transmitted beams is sequentially reported in a manner of ascending
order or descending order, the decoding unit 240 may determine the
order information of the N candidate transmitted beams based on
encoding order of the identifications of the N candidate
transmitted beams.
[0066] As shown in FIG. 3(a), it is assumed that the information of
the N candidate transmitted beams is reported in a manner of
descending order is previously agreed between the electronic
equipment 200 and the user equipment, after the decoding unit 240
sequentially decodes the CSI-RS resource 1, the CSI-RS resource 2,
the CSI-RS resource 3 and the CSI-RS resource 4, it is considered
that the candidate transmitted beams are arranged in descending
order, including: a candidate transmitted beam represented by the
CSI-RS resource 1; a candidate transmitted beam represented by the
CSI-RS resource 2; a candidate transmitted beam represented by the
CSI-RS resource 3; and a candidate transmitted beam represented by
the CSI-RS resource 4. That is, the candidate transmitted beam
represented by the CSI-RS resource 1 is optimal and the candidate
transmitted beam represented by the CSI-RS resource 4 is the
worst.
[0067] According to an embodiment of the present disclosure, in a
case that the decoding unit 240 determines the order information of
the N candidate transmitted beams based on the information about
the N candidate transmitted beams, the selecting unit 220 may
select a transmitted beam for transmitting downlink information to
the user equipment based on the order information of the N
candidate transmitted beams. For example, the selecting unit 220
may select an optimal transmitted beam in the N candidate
transmitted beams for transmitting downlink information to the user
equipment.
[0068] According to an embodiment of the present disclosure, the
decoding unit 240 may further determine channel quality information
between all or a part of candidate transmitted beams in the N
candidate transmitted beams and the user equipment based on the
information about the N candidate transmitted beams. That is, the
decoding unit 240 may decode the information of the N candidate
transmitted beams, thereby determining identification information
of the N candidate transmitted beams and the channel quality
information between all or a part of candidate transmitted beams in
the N candidate transmitted beams and the user equipment
[0069] According to an embodiment of the present disclosure, the
channel quality information may be represented by various
parameters, including but not limited to RSRP (Reference Signal
Receiving Power), RSRQ (Reference Signal Receiving Quality) and
BLER (Block Error Rate).
[0070] FIG. 3(b) is a schematic diagram showing contents of
information about N candidate transmitted beams according to
another embodiment of the present disclosure. As shown in FIG.
3(b), the information about the N candidate transmitted beams may
include identification information of the N candidate transmitted
beams and channel quality information between each of the N
candidate transmitted beams and a user equipment. N is 4 and
identifications of the candidate transmitted beams are represented
by identifications of CSI-RS resources, and channel qualities
between the candidate transmitted beams and the user equipment are
represented by RSRP values. For example, a RSRP between a candidate
transmitted beam represented by the CSI-RS resource 1 and the user
equipment is RSRP value 1, a RSRP between a candidate transmitted
beam represented by the CSI-RS resource 2 and the user equipment is
RSRP value 2, a RSRP between a candidate transmitted beam
represented by the CSI-RS resource 3 and the user equipment is RSRP
value 3, and a RSRP between a candidate transmitted beam
represented by the CSI-RS resource 4 and the user equipment is RSRP
value 4. That is, FIG. 3(b) shows a case in which the information
about the N candidate transmitted beams includes the channel
quality information between each of the N candidate transmitted
beams and the user equipment. That is, the user equipment reports
the channel quality information between each of the N candidate
transmitted beams and the user equipment when reporting the N
candidate transmitted beams. The report manner used by the user
equipment may be referred to as a "full report", and the report
manner shown in FIG. 3(a) may be referred to as a "partial
report".
[0071] FIG. 3(c) is a schematic diagram showing contents of
information about N candidate transmitted beams according to yet
another embodiment of the present disclosure. As shown in FIG.
3(c), the information about the N candidate transmitted beams may
include identification information of the N candidate transmitted
beams and channel quality information between a part of the N
candidate transmitted beams and a user equipment. This report
manner may be referred to as a "hybrid report". N is 2 and
identifications of the candidate transmitted beams are represented
by identifications of CSI-RS resources, and channel qualities
between the candidate transmitted beams and the user equipment are
represented by RSRP values. For example, a RSRP between a candidate
transmitted beam represented by the CSI-RS resource 2 and the user
equipment is RSRP value 2, and a RSRP between a candidate
transmitted beam represented by the CSI-RS resource 3 and the user
equipment is RSRP value 3.
[0072] According to an embodiment of the present disclosure, the
information about the N candidate transmitted beams may only
include a maximum value and a minimum value included in the channel
quality information between the N candidate transmitted beams and
the user equipment. For example, in FIG. 3(c), it is assumed that
among the RSRPs between the 4 candidate transmitted beams and the
user equipment, the RSRP between the candidate transmitted beam
represented by the CSI-RS resource 2 and the user equipment is the
maximum value which is RSRP value 2, and the RSRP between the
candidate transmitted beam represented by the CSI-RS resource 3 and
the user equipment is the minimum value which is RSRP value 3, the
information about the N candidate transmitted beams may only
include identification information of the 4 candidate transmitted
beams, the RSRP value 2 and the RSRP value 3.
[0073] According to an embodiment of the present disclosure, in a
case that the decoding unit 240 determines channel quality
information between all or a part of candidate transmitted beams in
the N candidate transmitted beams and the user equipment based on
the information about the N candidate transmitted beams, the
selecting unit 220 may select a transmitted beam for transmitting
downlink information to the user equipment based on the channel
quality information between the all or a part of candidate
transmitted beams and the user equipment. For example, the
selecting unit 220 may select a candidate transmitted beam with the
best channel quality for transmitting downlink information to the
user equipment.
[0074] As described above, the selecting unit 220 may select the
transmitted beam for transmitting downlink information to the user
equipment based on the information about the N candidate
transmitted beams. The process of selection may follow criteria
such as: the order information of the N candidate transmitted
beams; and the channel quality information between all or a part of
the N candidate transmitted beams and the user equipment and the
like. Alternatively, the selecting unit 220 may also select a
transmitted beam based on other criteria, which are not limited in
the present disclosure. The selecting unit 220 may only select one
transmitted beam for transmitting downlink information. Next, the
determining unit 230 may determine a TCI state based on the
selected transmitted beam.
[0075] According to an embodiment of the present disclosure, the
determining unit 230 may determine a beam for transmitting a
Synchronization Signal Block SSB corresponding to the selected
transmitted beam.
[0076] According to an embodiment of the present disclosure, during
an initial access of the user equipment, the electronic equipment
200 may transmit a SSB (which includes a synchronization signal
such as a primary synchronization signal and a secondary
synchronization signal) to the user equipment by using a beam.
Similar to transmitting a CSI-RS, a SSB is transmitting using
different resources for different beams used for transmitting the
SSB. That is, beams used for transmitting the SSB correspond to SSB
resources one to one, and therefore, in the present disclosure, the
beams for transmitting the SSB may be represented by
identifications of the SSB resources. Furthermore, according to an
embodiment of the present disclosure, a radiation range in space of
the beams for transmitting the SSB during the initial access is
greater than or equal to a radiation range of transmitted beams for
transmitting downlink information during data transmission. That
is, one or more transmitted beams for transmitting downlink
information may be included in a radiation range of the beams for
transmitting the SSB. That is, from the perspective of space, one
beam for transmitting a SSB may include one or more transmitted
beams for transmitting downlink information.
[0077] According to an embodiment of the present disclosure, the
determining unit 230 may determine a beam for transmitting a
Synchronization Signal Block SSB corresponding to the selected
transmitted beam, such that a radiation range of the selected
transmitted beam is within a radiation range of a beam for
transmitting the SSB corresponding to the selected transmitted
beam. That is, the determining unit 230 may determine that the
selected transmitted beam is within a radiation range of which of
beams for transmitting the SSB, thereby determining that the beam
for transmitting the SSB is a beam for transmitting the SSB
corresponding to the selected transmitted beam, and the beam may be
represented by identification of the SSB resource.
[0078] According to an embodiment of the present disclosure, the
determining unit 230 may determine a TCI state to be transmitted to
the user equipment based on a mapping relation between the TCI
state and the beam for transmitting the SSB.
[0079] FIG. 4 is a schematic diagram showing a mapping relation
between a TCI state and resource identification information of a
SSB according to an embodiment of the present disclosure. In FIG.
4, beams for transmitting SSB are represented by identifications of
SSB resources. FIG. 4 shows 8 identifications of the SSB resources,
ranging from SSB resource ID (Identification) 1 to SSB resource ID
8. Therefore, the electronic equipment 200 may use 3-bit TCI state
to represent the 8 identifications of the SSB resources, ranging
from 000 to 111. In FIG. 4, QCL (Quasi Co-Location) represents that
a relationship between a synchronization signal in a SSB and
downlink information (for example, CSI-RS) transmitted by a
transmitted beam in a space range of beams for transmitting a SSB
is a quasi co-location relation, that is, a user equipment may
adopt the same received beam to receive beams for transmitting the
SSB and transmitted beams for transmitting downlink information
within a space range of the beams. That is, the TCI may be used for
representing that there is a QCL relationship between the
synchronization signal in the SSB and the downlink information (for
example, CSI-RS) transmitted by the transmitted beams. Further, a
QCL type shown in FIG. 4 represents that the QCL type parameter is
used for a time domain or a spatial domain. The QCL type shown in
FIG. 4 is 4, which represents that the QCL type parameter may be
used for the spatial domain. According to an embodiment of the
present disclosure, after determining a beam for transmitting a SSB
corresponding to the selected transmitted beam, the determining
unit 230 may determine a TCI state to be transmitted based on a
mapping relation shown in FIG. 4. For example, it is assumed that
the determining unit 230 determines that the beam for transmitting
the SSB corresponding to the selected transmitted beam is a beam
represented by SSB resource ID 3, it may be determined that the TCI
state to be transmitted is 010.
[0080] As shown in FIG. 2, the electronic equipment 200 may further
include an establishing unit 250 configured to establish a mapping
relation between the TCI state and the beam for transmitting a SSB
after an initial access is completed. The electronic equipment 200
may establish a mapping relation as shown in FIG. 4 for each of
user equipments. After the initial access of the user equipment is
completed, the establishing unit 250 may determine all of beams for
transmitting the SSB that can be identified by the user equipment,
and determine a TCI state for each of beams based on the beams,
thereby establishing a mapping relation as shown in FIG. 4.
Further, the communication unit 210 may also transmit, to the user
equipment, the mapping relation between the TCI state and the beam
for transmitting the SSB, such that the user equipment may
determine corresponding beam for transmitting the SSB after
receiving the TCI state.
[0081] As shown in FIG. 2, the electronic equipment 200 may further
include a storage unit 260 configured to store the mapping relation
between the TCI state and the beam for transmitting the SSB, such
that the determining unit 230 may determine the TCI state to be
transmitted to the user equipment based on the mapping relation
between the TCI state and the beam for transmitting the SSB stored
in the storage unit 260.
[0082] FIG. 5 is a signaling flowchart showing a network side
device and user equipment acquiring a mapping relation between a
TCI state and a beam of transmitting a SSB according to an
embodiment of the present disclosure. In FIG. 5, the beam for
transmitting the SSB is still represented by a SSB resource ID. As
shown in FIG. 5, in step S501, a process of initial access is
performed between a base station and a user equipment. The present
disclosure does not focus on the process of initial access, and
therefore the process is not described in detail. Next, in step
S502, the base station establishes a mapping relation between a TCI
state and a SSB resource ID and stores the mapping relation. Next,
in step 503, the base station transmits the mapping relation
between the TCI state and the SSB resource ID to the user
equipment. Thus, both the base station and the user equipment may
obtain and store the mapping relation between the TCI state and
resource identification information of the SSB.
[0083] As described above, there is a mapping relation between the
TCI state and beams for transmitting the SSB to which the selected
transmitted beam belongs, and therefore, the electronic equipment
200 may report information about the selected transmitted beam to
the user equipment by using the TCI state, such that the user
equipment may know the information about the selected transmitted
beam, thereby selecting an appropriate received beam.
[0084] According to an embodiment of the present disclosure, the
electronic equipment 200 may transmit the TCI state to the user
equipment through a low-level signaling, including but not limited
to DCI (Downlink Control Information)
[0085] According to an embodiment of the present disclosure, the
communication unit 200 may periodically receive, from the user
equipment, the information about the N candidate transmitted beams.
Furthermore, the communication unit 210 may also send a request to
the user equipment to request the user equipment to report the
information about the N candidate transmitted beams, thereby
obtaining the information about the N candidate transmitted beams.
That is, the electronic equipment 200 may configure a manner of
reporting the N candidate transmitted beams for the user equipment
as needed. In one exemplary embodiment, the communication unit 210
may periodically receive, from the user equipment, the information
about the N candidate transmitted beams as shown in FIG. 3(a), and
send a request to the user equipment to obtain the information
about the N candidate transmitted beams as shown in FIG. 3(b) and
FIG. 3(c) if needed.
[0086] According to an embodiment of the present disclosure, the
electronic equipment 200 may configure the related information
about reporting N candidate transmitted beams for the user
equipment. For example, the electronic equipment 200 may configure
a number of the N candidate transmitted beams and transmit
configuration information about the number of the N candidate
transmitted beams to the user equipment. In an embodiment, the
electronic equipment 200 may transmit the configuration information
about the number of the N candidate transmitted beams to the user
equipment through a high-level signaling, including but not limited
to an RRC (Radio Resource Control) signaling. In an embodiment, N
may be 2.sup.n, where n is a nonnegative integer such as 1, 2, 4
and 8.
[0087] According to an embodiment of the present disclosure, the
electronic equipment 200 may transmit K transmitted beams to the
user equipment for selecting, by the user equipment, N candidate
transmitted beams from the K transmitted beams, where K is an
integer greater than or equal to N. In an embodiment, K may be
2.sup.k, where K is a positive integer which is preferably 4, 8,
16, 32 or 64.
[0088] According to an embodiment of the present disclosure, the
electronic equipment 200 may configure contents of the information
about the N candidate transmitted beams which include the full
report, the partial report and the hybrid report as described
above, and transmit the configuration information of the contents
of the information about the N candidate transmitted beams to the
user equipment. In an embodiment, the electronic equipment 200 may
transmit such configuration information to the user equipment
through the low-level signaling, including but not limited to DCI.
Further, the electronic equipment 200 may configure a default
report manner as the partial report for the user equipment, and
triggers the partial report and the hybrid report if needed. In
this case, the electronic equipment 200 may use 1 bit to represent
such configuration information. For example, the full report is
represented by 0 and the hybrid report is represented by 1.
[0089] According to an embodiment of the present disclosure, the
electronic equipment 200 may configure a encoding mode about the
information of the N candidate transmitted beams which are five
report manners of the user equipment mentioned below, and transmits
configuration information of the encoding mode about the
information of the N candidate transmitted beams to the user
equipment. In an embodiment, the electronic equipment 200 may
transmit such configuration information to the user equipment
through the low-level signaling, including but not limited to DCI.
In an embodiment, the electronic equipment 200 may use 3 bits to
represent such configuration information.
[0090] According to an embodiment of the present disclosure, the
electronic equipment 200 may configure report triggering modes
about the information of the N candidate transmitted beams, which
include periodic triggering and event triggering. In a case of the
periodic triggering, the electronic equipment 200 may transmit
configuration information about reporting periods of the
information of the N candidate transmitted beams to the user
equipment. In a case of the event triggering, the electronic
equipment 200 may send a request to the user equipment to request
to report the information about the N candidate transmitted
beams.
[0091] Thus, according to an embodiment of the present disclosure,
the electronic equipment 200 may configure the related information
about reporting the N candidate transmitted beams for the user
equipment. Furthermore, in order to further save overhead, the
network side device may further set some default configurations.
For example, in a case of configuring the periodic report for the
user equipment, the partial report manner may be configured for the
user equipment. In a case of configuring the event report for the
user equipment, the manners of the full report and the hybrid
report may be configured for the user equipment. Illustration
described above is only exemplary, and the electronic equipment 200
may further configure other information about reporting the N
candidate transmitted beams.
[0092] According to an embodiment of the present disclosure, the
TCI state may be used for indicating a received beam for receiving
downlink information to the user equipment. That is, the TCI state
is information associated with the received beam for receiving the
downlink information by the user equipment. The downlink
information may include controlling information such as a reference
signal (which includes but not limited to CSI-RS). Specifically,
the TCI may be used for representing that there is a QCL relation
between the synchronization signal in the SSB and the downlink
information (for example, CSI-RS) transmitted by the transmitted
beams for transmitting downlink information included in a radiation
range of beams for transmitting the SSB. In other words, the TCI
state may be used for representing that there is a QCL relation
between downlink information to be transmitted by the electronic
equipment 200 and the synchronization signal transmitted by the
beams for transmitting the SSB to which the selected transmitted
beam belongs. That is, the user equipment may adopt the same
received beam to receive a transmitted beam for transmitting
downlink information and a beam for transmitting the SSB
corresponding to the transmitted beam for transmitting the downlink
information. In conclusion, the TCI state is information associated
with the transmitted beams for transmitting the downlink
information by the electronic equipment 200, and the user equipment
knows a mapping relation between the transmitted beams and the
received beams, such that the TCI state may indirectly indicate the
received beams for receiving the downlink information to the use
equipment.
[0093] Thus, it can be seen that the electronic equipment 200
according to an embodiment of the present disclosure may select a
transmitted beam for transmitting downlink information from the N
candidate transmitted beams provided by the user equipment, and
determine a TCI state corresponding to the selected transmitted
beam to notify the user equipment. Thus, the electronic equipment
200 may notify the user equipment of information related to the
selected transmitted beam by using the TCI state, such that the
user equipment may obtain the information related to the
transmitted beam selected by the electronic equipment 200, thereby
selecting an appropriate received beam.
3. Configuration Example of a User Equipment
[0094] FIG. 6 is a block diagram showing a structure of an
electronic equipment 600 serving as a user equipment in a wireless
communication system according to an embodiment of the present
disclosure. As shown in FIG. 6, the electronic equipment 600 may
include a communication unit 610 and a determining unit 620.
[0095] Various units of the electronic equipment 600 may be
included in a processing circuit. It should be noted that the
electronic equipment 600 may include one processing circuit or
multiple processing circuits. Further, the processing circuit may
include various separated functional units to perform various
different functions and/or operations. It should be noted that
these functional units may be physical entities or logical
entities, and units of different names may be implemented by a same
physical entity.
[0096] According to an embodiment of the present disclosure, the
communication unit 610 may receive, from a network side device, a
Transmission Configuration Indication TCI state. The network side
device may be a network side device providing services to the
electronic equipment 600, and may be implemented by the electronic
equipment 200 described above.
[0097] According to an embodiment of the present disclosure, the
determining unit 620 may determine a received beam for receiving
downlink information from the network side device based on the TCI
state.
[0098] Thus, it can be seen that the electronic equipment 600
according to an embodiment of the present disclosure may determine
a received beam for receiving downlink information based on a TCI
state received from the network side device. As described above,
the TCI state received from the network side device is associated
with a transmitted beam selected by the network side device, such
that the electronic equipment 600 may select an appropriate
received beam based on the transmitted beam, thereby improving a
system gain.
[0099] FIG. 7 is a signaling flowchart showing a method for
determining a transmitted beam and a received beam according to an
embodiment of the present disclosure. As shown in FIG. 7, in step
S701, a UE transmits information about N candidate transmitted
beams to a base station. Next, in step S702, the base station
selects, from the N candidate transmitted beams, a transmitted beam
for transmitting downlink information to the UE. Next, in step
S703, the base station determines a TCI state based on the selected
transmitted beam and transmits the TCI state to the UE. Next, in
step S704, the UE determines a received beam for receiving the
downlink information based on the received TCI state. Therefore,
the UE may determine an appropriate received beam based on the
transmitted beam selected by the base station.
[0100] According to an embodiment of the present disclosure, the
electronic equipment 600 may receive the TCI state from the network
side device based on the low-level signaling, including but not
limited to DCI.
[0101] According to an embodiment of the present disclosure, the
communication unit 610 may further transmit, to the network side
device, information about N candidate transmitted beams for
selecting, by the network side device, a transmitted beam for
transmitting downlink information to the electronic equipment from
the N candidate transmitted beams, and determine the TCI state
based on the selected transmitted beam, where N is an integer
greater than 1.
[0102] According to an embodiment of the present disclosure, the
communication unit 610 may receive K transmitted beams of the
network side device from the network side device. Further, as shown
in FIG. 6, the electronic equipment 600 may further include a
selecting unit 630 configured to determine the N candidate
transmitted beams based on channel quality between the K
transmitted beams of the network side device and the electronic
equipment 600, where K is an integer greater than or equal to N.
That is, the selecting unit 630 may measure channel quality between
each of the K transmitted beams and the electronic equipment 600,
and selects, from the K transmitted beams, N transmitted beams with
good channel quality as candidate transmitted beams based on the
channel quality.
[0103] According to an embodiment of the present disclosure, the
selecting unit 630 may determine the channel quality based on one
or more of parameters including RSRP, RSRQ and BLER. Each of the
above parameters may include multiple parameters. For example, the
BLER may include a BLER for PDCCH (Physical Downlink Control
Channel) and a BLER for PDSCH (Physical Downlink Share
Channel).
[0104] According to an embodiments of the present disclosure, in a
case of determining the channel quality based on one parameter such
as RSRP, for example, the selecting unit 630 may measure a RSRP
value between each of the K transmitted beams and the electronic
equipment 600, and selects, from the K transmitted beams, N
transmitted beam with the highest RSRP values as candidate
transmitted beams. A case that the channel quality is represent by
the RSRQ and the BLER is similar to the case that the channel
quality is represent by the RSRP.
[0105] According to an embodiment of the present disclosure, the
selecting unit 630 may further determine the channel quality based
on two parameters. For example, the selecting unit 630 may select a
transmitted beam that meets the two following conditions as a
candidate transmitted beam, including: a first channel quality
parameter between the transmitted beam and the electronic equipment
600 meets a condition defined by a first channel quality parameter
threshold (for example, the first channel quality parameter is
greater than or less than the first channel quality parameter
threshold, which depends on a specific representation of the first
channel quality parameter. For example, in a case that the first
channel quality parameter is the RSRP or the RSRQ, the first
channel quality parameter needs to be greater than the first
channel quality parameter threshold; in a case that the first
channel quality parameter is the BLER, the first channel quality
parameter needs to be less than the first channel quality parameter
threshold; and such a criterion also applies to other channel
quality parameters); and a second channel quality parameter between
the transmitted beam and the electronic equipment 600 is the best
top N of the second channel quality parameters of all transmitted
beams.
[0106] The selecting unit 630 may implement the above selection by
the following steps: first, the selection unit 630 may select, from
the K transmitted beams, transmitted beams that the first channel
quality parameter between the electronic equipment 600 and the
transmitted beams is greater than or less than the first channel
quality parameter threshold; and then, the selecting unit 630 may
select, from the above transmitted beams, transmitted beams with
the top N ranked second channel quality parameter as candidate
transmitted beams.
[0107] According to an embodiment of the present disclosure, each
of the RSRP, the RSRQ and the BLER may include multiple parameters,
and therefore, there may be more than two conditions that a
transmitted beam needs to meet. For example, the selecting unit 630
may also select a transmitted beam that meets the following three
conditions as a candidate transmitted beam: the first channel
quality parameter between the transmitted beam and the electronic
equipment 600 meets a condition defined by the first channel
quality parameter threshold; a third channel quality parameter
between the transmitted beam and the electronic equipment 600 meets
a condition defined by a third channel quality parameter threshold
(for example, the third channel quality parameter is greater than
or less than the third channel quality parameter threshold, which
depends on a specific representation of the third channel quality
parameter. For example, in a case that the third channel quality
parameter is the RSRP or the RSRQ, the third channel quality
parameter needs to be greater than the third channel quality
parameter threshold; and in a case that the third channel quality
parameter is the BLER, the third channel quality parameter needs to
be less than the third channel quality parameter threshold); and
the second channel quality parameter between the transmitted beam
and the electronic equipment 600 is the best top N of the second
channel quality parameters of all transmitted beams.
[0108] The selecting unit 630 may implement the above selection by
the following steps: first, the selecting unit 630 may select, from
the K transmitted beams, multiple transmitted beams that meet the
following conditions: the first channel quality parameter between
each of the multiple transmitted beams and the electronic equipment
600 is greater than or less than the first channel quality
parameter threshold and the third channel quality parameter between
each of the multiple transmitted beams and the electronic equipment
600 is greater than or less than the third channel quality
parameter threshold; and then, the selecting unit 630 may select
transmitted beams with the top N ranked second channel quality
parameter from the multiple transmitted beams that meet conditions
as candidate transmitted beams.
[0109] A specific example is given below. The BLER for the PDSCH is
defined as the first channel quality parameter, the BLER for the
PDCCH is defined as the third channel quality parameter, and the
RSRP is defined as the second channel quality parameter. The first
channel quality parameter threshold is 10% and the third channel
quality parameter threshold is 1%. First, the selecting unit 630
may select transmitted beams with the BLER for the PDSCH which is
less than 10% and the BLER for the PDCCH which is less than 1%; and
then, the selecting unit 630 ranks the transmitted beams that meet
the above conditions in order of large to small RSRP values, and
selects the ranked top N transmitted beams as candidate transmitted
beams.
[0110] As described above, an embodiment that the selecting unit
630 selects the N candidate transmitted beams based on one or two
parameters is shown in an exemplary way. Alternatively, the
selecting unit 630 may also select N candidate transmitted beams
based on other criteria and may also select N candidate transmitted
beams based on more parameters, such that the channel quality of
the selected N candidate transmitted beams is good. Next, the
electronic equipment 600 may report the selected N candidate
transmitted beams to the network side device.
[0111] As shown in FIG. 6, the electronic equipment 600 may further
include a encoding unit 640 configured to encode information of the
N candidate transmitted beams to generate information about the N
candidate transmitted beams for transmitting to the network side
device.
[0112] According to an embodiment of the present disclosure, as
shown in FIG. 3(a), the information about the N candidate
transmitted beams may include identification information of the N
candidate transmitted beams. Further, the information about the N
candidate transmitted beams may include order information of the N
candidate transmitted beams. For example, in a case that an ordered
manner is agreed between the electronic equipment 600 and the
network side device to report the N candidate transmitted beams,
the encoding unit 640 may sequentially encode the information of
the N candidate transmitted beams in a manner of descending order
or ascending order. Furthermore, as shown in FIG. 3(b) and FIG.
3(c), the information of the N candidate transmitted beams may
include the channel quality information between all or a part of
candidate transmitted beams in the N candidate transmitted beams
and the electronic equipment 600.
[0113] According to an embodiment of the present disclosure, the
encoding unit 640 may express the identification of each of the N
candidate transmitted beams by using binary coding. The encoding
unit 640 may determine number of bits of the binary coding based on
value of K. For example, in a case that K=8, that is, the
electronic equipment 600 selects N candidate transmitted beams from
8 transmitted beams, the encoding unit 640 may express the
identification of each of the candidate transmitted beams by using
3-bit binary coding.
[0114] FIG. 8 is a schematic diagram showing a first method for
reporting candidate transmitted beams according to an embodiment of
the present disclosure. As shown in FIG. 8, it is assumed that K=8
and N=4. The selecting unit 630 selects 4 transmitted beams from 8
transmitted beams (t CSI-RS resource 0 to 7), including: a
transmitted beam represented by CSI-RS resource 2; a transmitted
beam represented by CSI-RS resource 4; a transmitted beam
represented by CSI-RS resource 3; a transmitted beam represented by
CSI-RS resource 7, and the 4 transmitted beams are arranged in a
descending order in direction of arrow. That is, the transmitted
beam represented by the CSI-RS resource 2 is best and the
transmitted beam represented by the CSI-RS resource 7 is worst.
According to an embodiment of the present disclosure, the encoding
unit 640 may determine that the identification of each of the
candidate transmitted beams is expressed by 3 bits. That is, the
transmitted beam represented by the CSI-RS resource 2 is expressed
by 010, the transmitted beam represented by the CSI-RS resource 4
is expressed by 100, the transmitted beam represented by the CSI-RS
resource 3 is expressed by 011, and the transmitted beam
represented by the CSI-RS resource 7 is expressed by 111. Next, the
encoding unit 640 may combine the identification information of the
N candidate transmitted beams to generate final report information.
As shown in FIG. 8, the information about the N candidate
transmitted beams is expressed by 010100011111. Furthermore, the
information about the N candidate transmitted beams shown in FIG. 8
includes the order information of the N candidate transmitted
beams. That is, the network side device may obtain the order
information of the N candidate transmitted beams when decoding the
information of the N candidate transmitted beams. If the 4
candidate transmitted beams as shown in FIG. 8 are reported in
unordered manner, the order of identification information of the 4
candidate transmitted beams after being encoded may be changed. For
example, the reported information may be expressed by
010011100111.
[0115] According to an embodiment of the present disclosure, the
encoding unit 640 may express the identification of the N candidate
transmitted beams by using a bit map. That is, the encoding unit
640 may determine bits of the bit map based on value of K. A bit in
the bit map of 1 indicates that a transmitted beam corresponding to
the bit is selected as a candidate transmitted beam and a bit in
the bit map of 0 indicates that a transmitted beam corresponding to
the bit is not selected as a candidate transmitted beam.
[0116] FIG. 9 is a schematic diagram showing a second method for
reporting candidate transmitted beams according to an embodiment of
the present disclosure. As shown in FIG. 9, it is still assumed
that K=8, N=4, and the selecting unit 630 selects 4 transmitted
beams from 8 transmitted beams (CSI-RS resource 0 to 7), including:
a transmitted beam represented by CSI-RS resource 2; a transmitted
beam represented by CSI-RS resource 4; a transmitted beam
represented by CSI-RS resource 3; a transmitted beam represented by
CSI-RS resource 7, and the 4 transmitted beams are arranged in a
descending order in direction of arrow. The encoding unit 640 may
determine that identification information of the 4 candidate
transmitted beams is expressed by using an 8-bit bit map. That is,
8 bits of the bit map correspond to transmitted beams represented
by CSI-RS resource 0 to 7 respectively. Then the bit map as shown
in FIG. 9 may be determined, such that the encoding unit 640 may
determine that the report information is expressed by 00111001. The
information about the N candidate transmitted beams as shown in
FIG. 9 only includes identification information of the N candidate
transmitted beams without order information of the N candidate
transmitted beams. That is, a network side device does not know the
order information of the N candidate transmitted beams when
decoding the information of the N candidate transmitted beams.
[0117] According to an embodiment of the present disclosure, the
encoding unit 640 may express the identification of a reference
candidate transmitted beam in the N candidate transmitted beams by
using the binary coding, and express the identification of other
candidate transmitted beams in addition to the reference candidate
transmitted beam in the N candidate transmitted beams by using
binary coding of a difference value between identifications of
other candidate transmitted beams and the reference candidate
transmitted beam. The encoding unit 640 may select a candidate
transmitted beam closest to an intermediate position of all
transmitted beams as a reference candidate transmitted beam, and
express the identification of the reference candidate transmitted
beam by using the binary coding. The identification of other
candidate transmitted beams is expressed by using binary coding of
a difference value between identifications of other candidate
transmitted beams and the reference candidate transmitted beam.
Further, the encoding unit 640 may determine whether the difference
value between identifications of other candidate transmitted beams
and the reference candidate transmitted beam is positive or
negative, based on an encoding order of identifications of other
candidate transmitted beams and the reference candidate transmitted
beam. For example, the encoding unit 640 may determine a difference
value between identifications of the reference candidate
transmitted beam and candidate transmitted beam that is encoded
before the identification of the reference candidate transmitted
beam is negative, and may determine a difference value between
identifications of the reference candidate transmitted beam and
candidate transmitted beam that is encoded after the identification
of the reference candidate transmitted beam is positive.
[0118] FIG. 10 is a schematic diagram showing a third method for
reporting candidate transmitted beams according to an embodiment of
the present disclosure. As shown in FIG. 10, it is still assumed
that K=8, N=4, and the selecting unit 630 selects 4 transmitted
beams from 8 transmitted beams (CSI-RS resource 0 to 7), including:
a transmitted beam represented by CSI-RS resource 2; a transmitted
beam represented by CSI-RS resource 4; a transmitted beam
represented by CSI-RS resource 3; a transmitted beam represented by
CSI-RS resource 7, and the 4 transmitted beams are arranged in a
descending order in direction of arrow. Since the candidate
transmitted beam represented by the CSI-RS resource 3 and the
candidate transmitted beam represented by the CSI-RS resource 4 are
located in an intermediate position of the 8 candidate transmitted
beams, the candidate transmitted beam represented by the CSI-RS
resource 3 or the candidate transmitted beam represented by the
CSI-RS resource 4 may be selected as a reference candidate
transmitted beam. In FIG. 10, the candidate transmitted beam
represented by the CSI-RS resource 4 is selected as the reference
candidate transmitted beam. As shown in FIG. 10, the encoding unit
640 represents identification information of the candidate
transmitted beam represented by the CSI-RS resource 4 by using
binary coding 100. Next, the encoding unit 640 calculates that a
difference value between the CSI-RS resource 2 and the CSI-RS
resource 4 is 2 and is negative, and therefore, identification
information of the candidate transmitted beam represented by the
CSI-RS resource 2 is expressed by 10 and the identification
information should be encoded before identification information of
the reference candidate transmitted beam. Similarly, the encoding
unit 640 calculates that a difference value between the CSI-RS
resource 3 and the CSI-RS resource 4 is 1 and is negative, and
therefore, identification information of the candidate transmitted
beam represented by the CSI-RS resource 3 is expressed by 01 and
the identification information should be encoded before the
identification information of the reference candidate transmitted
beam. The encoding unit 640 calculates that a difference value
between the CSI-RS resource 7 and the CSI-RS resource 4 is 3 and is
positive, and therefore, identification information of the
candidate transmitted beam represented by the CSI-RS resource 7 is
expressed by 11 and the identification information should be
encoded after the identification information of the reference
candidate transmitted beam. As shown in FIG. 10, the information
about the N candidate transmitted beams that is finally determined
by the encoding unit 640 is expressed by 100110011. The information
about the N candidate transmitted beams as shown in FIG. 10 only
includes the identical information about the N candidate
transmitted beams without order information of the N candidate
transmitted beams. That is, a network side device does not know the
order information of the N candidate transmitted beams when
decoding the information of the N candidate transmitted beams.
Further, since the identification of the reference candidate
transmitted beam is one bit more than that of identifications of
other candidate transmitted beams, the network side device may
determine a reference candidate transmitted beam when receiving the
information of the N candidate transmitted beams, and may determine
whether the difference value is positive or negative based on a
context between other candidate transmitted beams and the reference
candidate transmitted beam, thereby decoding identifications of all
candidate transmitted beams.
[0119] According to an embodiment of the present disclosure, the
encoding unit 640 may further be configured such that the bits of
identification of the reference candidate transmitted beam are more
than the bits of identifications of other candidate transmitted
beams in addition to the reference candidate transmitted beam.
Further, the encoding unit 640 may implement the above effect by
performing zero padding before the binary coding of the
identification of the reference candidate transmitted beam. That
is, if the encoding unit 640 determines that the bits of
identification of the reference candidate transmitted beam are the
same as the bits of the identifications of other candidate
transmitted beams, the encoding unit 640 may perform zero padding
before the binary coding of the identification of the reference
candidate transmitted beam, such that the bits of the
identification of the reference candidate transmitted beam are more
than the bits of the identifications of other candidate transmitted
beams.
[0120] According to an embodiment of the present disclosure, as
shown in FIG. 6, the electronic equipment 600 may further include a
storage unit 650 configured to store a first mapping table, which
stores a mapping relation between the combination of the N
candidate transmitted beams selected from the K transmitted beams
of the network side device and the combination identification.
Further, a storage unit of the network side device may also store
the first mapping table. The first mapping table may be stored in
advance in the storage unit of the electronic equipment 600 and the
storage unit of the network side device. Furthermore, the first
mapping table may be established by the network side device and
transmitted to the electronic equipment 600 through a high-level
signaling, including but not limited to an RRC signaling.
[0121] FIG. 11(a) is a schematic diagram showing a first mapping
table according to an embodiment of the present disclosure. FIG.
11(a) shows a case that K=4 and N=2. That is, the electronic
equipment 600 needs to select 2 candidate transmitted beams from 4
transmitted beams (CSI resource 0 to 3). The left side of FIG.
11(a) shows all combinations of the 2 candidate transmitted beams
selected from the 4 transmitted beams and the right side of FIG.
11(a) shows combination identifications corresponding to the
combinations. For example, 1100 shown in the left side expresses
that a transmitted beam represented by the CSI-RS resource 0 and a
transmitted beam represented by the CSI-RS resource 1 are selected,
and a combination identification corresponding to this combination
is expressed by 000. Bits required by combination identifications
may be determined based on the total number of the combinations.
For example, the total number of the combinations is calculated to
be 6 according to a formula C.sub.4.sup.2, to determine that 3 bits
are required to express the combination identifications.
[0122] According to an embodiment of the present disclosure, the
encoding unit 640 may determine combination identification
corresponding to the combination based on a first mapping table and
an unordered combination of the N candidate transmitted beams, and
express the identification of the N candidate transmitted beams by
using the combination identification.
[0123] FIG. 11(b) is a schematic diagram showing a fourth method
for reporting candidate transmitted beams according to an
embodiment of the present disclosure. As shown in FIG. 11(b), it is
assumed that K=4 and N=2. The selecting unit 630 selects 2
transmitted beams from 4 transmitted beams, including: a
transmitted beam represented by CSI-RS resource 1 and a transmitted
beam represented by CSI-RS resource 3, and the 2 transmitted beams
are arranged in a descending order in direction of arrow. According
to an embodiment of the present disclosure, the encoding unit 640
may determine that an unordered combination of the transmitted beam
represented by the CSI-RS resource 1 and the transmitted beam
represented by the CSI-RS resource 3 is expressed by 0101 as shown
in FIG. 11(a), thereby determining that a combination
identification corresponding to the unordered combination is
expressed by 100. Thus, the encoding unit 640 may determine that
information about the N candidate transmitted beams is expressed by
100. The information about the N candidate transmitted beams as
shown in FIG. 11(b) only includes identification information of the
N candidate transmitted beams without order information of the N
candidate transmitted beams. That is, a network side device does
not know the order information of the N candidate transmitted beams
when decoding the information about the N candidate transmitted
beams. Furthermore, the network side device may determine
identifications of the N candidate transmitted beams based on a
first mapping table stored in advance when receiving such
information.
[0124] According to an embodiment of the present disclosure, the
storage unit 650 may also store a second mapping table, which
stores a mapping relation between an arrangement of N candidate
transmitted beams selected from the K transmitted beams of the
network side device and arrangement identification. Further, a
storage unit of the network side device may also store the second
mapping table. The second mapping table may be stored in advance in
the storage unit of the electronic equipment 600 and the storage
unit of the network side device. Furthermore, the second mapping
table may be established by the network side device and transmitted
to the electronic equipment 600 through a high-level signaling,
including but not limited to an RRC signaling.
[0125] FIG. 12(a) is a schematic diagram showing a second mapping
table according to an embodiment of the present disclosure. FIG.
12(a) shows a case that K=4 and N=2. That is, the electronic
equipment 600 needs to select an ordered arrangement of 2 candidate
transmitted beams from 4 transmitted beams (CSI resource 0 to 3).
The left side of FIG. 12(a) shows all arrangements of 2 candidate
transmitted beams selected from the 4 transmitted beams, and the
right side of FIG. 12(a) shows arrangement identifications
corresponding to the arrangements. For example, 0001 shown in the
left side expresses that a transmitted beam represented by CSI-RS
resource 0 and a transmitted beam represented by CSI-RS resource 1
are selected, and the transmitted beam represented by the CSI-RS
resource 0 and the transmitted beam represented by the CSI-RS
resource 1 are arranged in a descending order, and arrangement
identification corresponding to this arrangement is expressed by
0000. As another example, 0010 shown in the left side expresses
that a transmitted beam represented by the CSI-RS resource 0 and a
transmitted beam represented by CSI-RS resource 2 are selected, and
the transmitted beam represented by the CSI-RS resource 0 and the
transmitted beam represented by the CSI-RS resource 2 are arranged
in a descending order, and arrangement identification corresponding
to this arrangement is expressed by 0001. Bits required by
arrangement identifications may be determined based on the total
number of arrangements. For example, the total number of the
arrangements is calculated to be 12 according to a formula
A.sub.4.sup.2, to determine that 4 bits are required to express the
arrangement identifications.
[0126] According to an embodiment of the present disclosure, the
encoding unit 640 may determine arrangement identification
corresponding to the arrangement based on the second mapping table
and an ordered arrangement of the N candidate transmitted beams,
and express identification and order of the N candidate transmitted
beams by using the arrangement identification.
[0127] FIG. 12(b) is a schematic diagram showing a fifth method for
reporting candidate transmitted beams according to an embodiment of
the present disclosure. As shown in FIG. 12(b), it is assumed that
K=4 and N=2. The selecting unit 630 selects 2 transmitted beams
from 4 transmitted beams, including: a transmitted beam represented
by CSI-RS resource 1 and a transmitted beam represented by CSI-RS
resource 3, and the 2 transmitted beams are arranged in a
descending order in direction of arrow. According to an embodiment
of the present disclosure, the encoding unit 640 may determine that
an ordered arrangement of the transmitted beam represented by the
CSI-RS resource 1 and the transmitted beam represented by the
CSI-RS resource 3 is expressed by 01, 11 shown in FIG. 12(a),
thereby determining that arrangement identification corresponding
to this arrangement is expressed by 0101. Thus, the encoding unit
640 may determine that information about the N candidate
transmitted beams is expressed by 0101. The information about the N
candidate transmitted beams shown in FIG. 12(b) includes not only
identification information of the N candidate transmitted beams,
but also order information of the N candidate transmitted beams.
That is, the network side device knows the order information of the
N candidate transmitted beams when decoding the information about
the N candidate transmitted beams. Furthermore, the network side
device may determine identification and order of the N candidate
transmitted beams based on a second mapping table stored in advance
when receiving such information.
[0128] As described above, FIG. 8, FIG. 9, FIG. 10, FIG. 11(b) and
FIG. 12(b) show five methods for reporting candidate transmitted
beams according to an embodiment of the present disclosure,
respectively. Among these reporting methods, only a method for
decoding identifications of the N candidate transmitted beams is
shown, and a method for decoding channel quality information is not
shown. Further, in a case that the information about the N
candidate transmitted beams includes channel quality information
between all or a part of candidate transmitted beams and the
electronic equipment 600, the encoding unit 640 may encode the
channel quality information according to any one of methods
well-known in the art, and may add an encoding of the channel
quality information between the candidate transmitted beams and the
electronic equipment 600, which is not described in detail in the
present disclosure.
[0129] As described above, the selecting unit 630 may select N
candidate transmitted beams, and the encoding unit 640 may encode
information about the N candidate transmitted beams. Further,
according to an embodiment of the present disclosure, the selecting
unit 630 may also select less than N candidate transmitted beams.
For example, after selecting N candidate transmitted beams, the
selecting unit 630 may also determine that whether a second channel
quality parameter between the N candidate transmitted beams and the
electronic equipment 600 meets a condition defined by a second
channel quality parameter threshold (for example, the second
channel quality parameter is greater than or less than the second
channel quality parameter threshold, which depends on a specific
representation of the second channel quality parameter. For
example, in a case that the second channel quality parameter is the
RSRP or the RSRQ, the second channel quality parameter need to be
greater than the second channel quality parameter threshold, and in
a case that the second channel quality parameter is the BLER, the
second channel quality parameter need to be less than the second
channel quality parameter threshold). Further, the selecting unit
630 may remove candidate transmitted beams which do not meet the
condition defined by the second channel quality parameter threshold
from the N candidate transmitted beams. In the above embodiment, if
candidate transmitted beams selected by the selecting unit 630 is
less than N, the encoding unit 640 may select the first reporting
method, the second reporting method and the third reporting method
to report the candidate transmitted beams. Further, in the first
reporting method and the second reporting method, the encoding unit
640 may encode identification information of the removed candidate
transmitted beam as 0. For example, it is assumed that a second
channel quality parameter of a transmitted beam represented by
CSI-RS resource 7 does not meet the condition defined by the second
channel quality parameter threshold, in an example shown in FIG. 8,
reported information may be expressed by 0101000110; in an example
shown in FIG. 9, reported information may be expressed by 00111000;
and in an example shown in FIG. 10, reported information may be
expressed by 10011000.
[0130] According to an embodiment of the present disclosure, the
selecting unit 630 may select N candidate transmitted beams further
based on the second channel quality parameter threshold, such that
candidate transmitted beams with poor channel quality parameter are
removed, thereby further reducing overhead.
[0131] According to an embodiment of the present disclosure, the
communication unit 610 may receive configuration information about
the number of the N candidate transmitted beams from the network
side device, for example, through a high-level signaling (which
includes but not limited to an RRC signaling). Furthermore, the
communication unit 610 may also send a request to the network side
device to request to reconfigure the number of N, and may receive
reconfiguration information about the number of the N candidate
transmitted beams from the network side device, for example,
through a low-level signaling (which includes but not limited to
DCI).
[0132] According to an embodiment of the present disclosure, the
communication unit 610 may also receive configuration information
of reporting methods from the network side device, for example,
through a high-level signaling (which includes but not limited to
an RRC signaling). One of the five reporting methods may be
expressed by 3 bits. Furthermore, the communication unit 610 may
also send a request to the network side device to request to
reconfigure the reporting method, and receive reconfiguration
information of the reporting method from the network side device,
for example, through a low-level signaling (which includes but not
limited to DCI).
[0133] Table 1 shows overhead required by the above five methods.
The unit of numbers in the table is number of bits. For the fourth
method and the fifth method, only the number of bits required in a
case of reporting the N candidate transmitted beams is shown, and
the number of bits required to store the first mapping table and
the second mapping table is not shown. Furthermore, Table 1 only
shows a case that K=[4, 8, 16, 32, 64] and N=[1, 2, 4, 8] where K
is greater than or equal to N.
TABLE-US-00001 TABLE 1 The third The second The fourth The first
The fifth method method method method method (unor- (unor- (unor-
(ordered) (ordered) dered) dered) dered) K = 4, 2 2 2 4 2 N = 1 K =
4, 4 4 3~4 4 3 N = 2 K = 4, 8 5 6 4 1 N = 4 K = 8, 3 3 3 8 3 N = 1
K = 8, 6 6 4~6 8 5 N = 2 K = 8, 12 11 9~10 8 7 N = 4 K = 8, 24 16
13 8 1 N = 8 K = 16, 4 4 4 16 4 N = 1 K = 16, 8 8 5~8 16 7 N = 2 K
= 16, 16 16 8~13 16 11 N = 4 K = 16, 32 29 17~25 16 14 N = 8 K =
32, 5 5 5 32 5 N = 1 K = 32, 10 10 6~10 32 9 N = 2 K = 32, 20 20
9~17 32 16 N = 4 K = 32, 40 39 18~33 32 24 N = 8 K = 64, 6 6 6 64 6
N = 1 K = 64, 12 12 7~12 64 11 N = 2 K = 64, 24 24 10~21 64 20 N =
4 K = 64, 48 48 19~41 64 33 N = 8
[0134] According to an embodiment of the present disclosure, the
network side device may select a reporting method based on values
of K and N, to reduce overhead required for reporting. In an
embodiment, in a case that N/K.gtoreq.0.5 and K>16, the second
method may be selected; in a case that K=N, the fourth method may
be selected; in a case that N.gtoreq.8, K.gtoreq.16 and N/K<0.5,
the third method may be selected; and in a case that N.ltoreq.4 and
K.ltoreq.16, the fourth method may be selected. Alternatively, the
above-described embodiment is only exemplary, and the network side
device may select a reporting method according to actual
situations.
[0135] According to an embodiment of the present disclosure, the
electronic equipment 600 may periodically transmit the information
about the N candidate transmitted beams to the network side device.
Further, the electronic equipment 600 may also transmit the
information about the N candidate transmitted beams in response to
a request of the network side device. That is, the electronic
equipment 600 transmits the information about the N candidate
transmitted beams to the network side device when receiving a
request of the network side device.
[0136] According to an embodiment of the present disclosure, the
electronic equipment 600 may receive, from the network side device,
configuration information of contents in the information of the N
candidate transmitted beams, for example, through a low-level
signaling (which includes but not limited to DCI), which includes
the full report, the partial report and the hybrid report. The full
report represents that the identification information of the N
candidate transmitted beams and the channel quality information
between each of the N candidate transmitted beams and the
electronic equipment 600 are required to be reported, as shown in
FIG. 3(b). The partial report represents that only the
identification information of the N candidate transmitted beams is
required to be reported, as shown in FIG. 3(a). The hybrid report
represents that the identification information of the N candidate
transmitted beams and maximum and minimum values of the channel
quality information between the N candidate transmitted beams and
the electronic equipment 600 are required to be reported, as shown
in FIG. 3(c).
[0137] That is, the network side device may configure contents,
triggering modes and reporting methods included in the information
about the N candidate transmitted beams. Furthermore, in order to
further reduce overhead for reporting, the network side device may
also configure the above information based on a certain criterion.
For example, in a case that the partial report is configured for
the electronic equipment 600, only the first reporting method and
the fifth reporting method (that is, the ordered reporting method)
may be adopted; and in a case that the full report and the hybrid
report are configured for the electronic equipment 600, only the
second reporting method, the third reporting method and the fourth
reporting method (that is, the unordered reporting method) may be
adopted. As another example, in a case that the periodic report is
configured for the electronic equipment 600, a manner of the
partial report may be configured for the electronic equipment 600;
and in a case that the event report is configured for the
electronic equipment 600, a manner of the full report and the
hybrid report may be configured for the electronic equipment 600.
In this case, the electronic equipment 600 may receive, from the
network side device, indicating information indicating the full
report or the hybrid report, for example, indicating by using 1-bit
information. Further, in a case that the third reporting method is
configured for the electronic equipment 600, a manner of the full
report method may be configured for the electronic equipment 600.
Alternatively, the above criteria are only exemplary preferred
manner and have no limiting effect.
[0138] Table 2 shows preferred manners of configuring, by the
network side device, reporting information for the electronic
equipment 600.
TABLE-US-00002 TABLE 2 Reporting method Triggering mode Reporting
content First method Periodic Partial report (ordered) Second
method Event Full report or (unordered) hybrid report Third method
Event Full report (unordered) Fourth method Event Full report or
(unordered) hybrid report Fifth method Periodic Partial report
(ordered)
[0139] FIG. 13 is a schematic diagram showing a process for
reporting candidate transmitted beams according to an embodiment of
the present disclosure. As shown in FIG. 13, a UE periodically
report information of N candidate transmitted beams to a base
station in a partial report manner, such that the base station
transmits a TCI state to the UE. The base station may also transmit
an indication for requesting a non-periodic report to the UE. For
example, 1 bit may be used to indicate whether the full reporting
manner or the hybrid reporting manner is used, and the UE may
report the information about the N candidate transmitted beams to
the base station in the full reporting manner or the hybrid
reporting manner in response to such indication. As described
above, FIG. 13 only shows an exemplary embodiment regarding report,
which is not limiting.
[0140] A process in which the electronic equipment 600 reports the
information about the N candidate transmitted beams to the network
side device is described in detail above. How the electronic
equipment 600 determines an appropriate received beam based on the
received TCI state is described in detail below.
[0141] According to an embodiment of the present disclosure, the
determining unit 620 may determine, based on a mapping relation
between the TCI state and a beam for transmitting a Synchronization
Signal Block SSB, a beam for transmitting the SSB.
[0142] According to an embodiment of the present disclosure, the
communication unit 610 may receive, after an initial access is
completed, from the network side device the mapping relation
between the TCI state and the beam for transmitting the SSB.
Further, the electronic equipment 600 may store the mapping
relation between the TCI state and the beam for transmitting the
SSB in the storage unit 650. The mapping relation between the TCI
state and the beam for transmitting the SSB is established by the
network side device, as shown in above FIG. 4, which is not
repeated herein. For example, the electronic equipment 600 may
determine a beam for transmitting the SSB represented by SSB
resource ID5 based on the mapping relation shown in FIG. 4 when
receiving a TCI state of 100.
[0143] According to an embodiment of the present disclosure, the
determining unit 620 may determine a received beam for receiving
downlink information from the network side device based on a
mapping relation between the beam for transmitting the SSB and the
received beam.
[0144] As shown in FIG. 6, the electronic equipment 600 may include
a establishing unit 660 configured to establish, in the process of
initial access, the mapping relation between the beam for
transmitting the SSB and the received beam. Also, the beam for
transmitting the SSB may be represented by resource identification
information of the SSB. During the process of initial access, the
network side device may transmit the SSB to the electronic
equipment 600, and the electronic equipment 600 uses the received
beam to receive the SSB transmitted by the network side device, and
may record which received beam is used to receive which beam for
transmitting the SSB, so as to gradually establish a mapping
relation between the received beam and the beam for transmitting
the SSB. Further, the electronic equipment 600 may store the
mapping relation between the beam for transmitting the SSB and the
received beam in the storage unit. For example, the electronic
equipment 600 may determine the beam for transmitting the SSB
represented by the SSB resource ID5 based on the mapping relation
shown in FIG. 4 when receiving a TCI state of 100, and may
determine the corresponding received beam based on the mapping
relation between the beam for transmitting the SSB and the received
beam.
[0145] FIG. 14 is a signaling flowchart showing that a user
equipment obtains a mapping relation between resource
identification information of a SSB and a received beam and a
mapping relation between a TCI state and resource identification
information of the SSB according to an embodiment of the present
disclosure. In FIG. 14, a beam for transmitting the SSB is
represented by the resource identification of the SSB. As shown in
FIG. 14, in step S1401, a UE establishes a mapping relation between
the resource identification of the SSB and a received beam during
the process of access. Next, in step S1402, after the process of
access is completed, a base station establishes a mapping relation
between the TCI state and the resource identification of the SSB.
Next, in step S1403, the base station transmits the mapping
relation between the TCI state and the resource identification of
the SSB to the UE. Thus, the UE obtains and stores the mapping
relation between the TCI state and the resource identification of
the SSB and the mapping relation between the resource
identification of the SSB and the received beam.
[0146] As described above, the electronic equipment 600 according
to an embodiment of the present disclosure may receive, from the
network side device, a TCI state which is related to a transmitted
beam selected by the network side device, and therefore, the
electronic equipment 600 may determine an appropriate received beam
based on the TCI state, such that the determined received beam
matches the transmitted beam of the network side device, thereby
implementing beamforming, and thus improving a system gain.
[0147] The electronic equipment 200 according to embodiments of the
present disclosure may serve as a network side device and the
electronic equipment 600 may serve as a user equipment. That is,
the electronic equipment 200 may provide services for the
electronic equipment 600. Therefore, all of the embodiments with
respect to the electronic equipment 200 described above are
applicable thereto.
4. Method Embodiments
[0148] Below a wireless communication performed by the electronic
equipment 200 which serves as a network side device in a wireless
communication system according to embodiments of the present
disclosure will be described in detail.
[0149] FIG. 15 is a flowchart showing a wireless communication
method performed by the electronic equipment 200 which serves as a
network side device in a wireless communication system according to
an embodiment of the present disclosure.
[0150] As shown in FIG. 15, in step S1510, information about N
candidate transmitted beams is received from a user equipment,
where N is an integer greater than 1.
[0151] Next, in step S1520, a transmitted beam for transmitting
downlink information to the user equipment is selected from the N
candidate transmitted beams.
[0152] Next, in step S1530, a Transmission Configuration Indication
TCI state is determined based on the selected transmitted beam, and
the TCI state is transmitted to the user equipment.
[0153] In an embodiment, the method further includes: determining
identification information of the N candidate transmitted beams
based on the information about the N candidate transmitted
beams.
[0154] In an embodiment, the method further includes: determining
order information of the N candidate transmitted beams based on the
information about the N candidate transmitted beams; and selecting
a transmitted beam for transmitting downlink information to the
user equipment based on the order information of the N candidate
transmitted beams.
[0155] In an embodiment, the method further includes: determining
channel quality information between all or a part of candidate
transmitted beams in the N candidate transmitted beams and the user
equipment based on the information about the N candidate
transmitted beams; and selecting a transmitted beam for
transmitting downlink information to the user equipment based on
the channel quality information between the all or a part of
candidate transmitted beams and the user equipment.
[0156] In an embodiment, determining a Transmission Configuration
Indication TCI state based on the selected transmitted beam
includes: determining a beam for transmitting a Synchronization
Signal Block SSB corresponding to the selected transmitted beam;
and determining a TCI state to be transmitted to the user equipment
based on a mapping relation between the TCI state and the beam for
transmitting the SSB.
[0157] In an embodiment, determining a beam for transmitting a
Synchronization Signal Block SSB corresponding to the selected
transmitted beam includes: causing that a radiation range of the
selected transmitted beam is within a radiation range of the beam
for transmitting the SSB corresponding to the selected transmitted
beam.
[0158] In an embodiment, the method further includes: after an
initial access is completed, establishing a mapping relation
between the TCI state and the beam for transmitting the SSB; and
transmitting, to the user equipment, the mapping relation between
the TCI state and the beam for transmitting the SSB.
[0159] In an embodiment, the method further includes: periodically
receiving, from the user equipment, the information about the N
candidate transmitted beams, or sending a request to the user
equipment to obtain the information about the N candidate
transmitted beams.
[0160] In an embodiment, the electronic equipment 200 includes a
network side device in a New Radio NR communication system.
[0161] According to an embodiment of the present disclosure, the
main body performing the above method may be the electronic
equipment 200 according to an embodiment of the present disclosure,
and thus all of the embodiments described above with respect to the
electronic equipment 200 are applicable thereto.
[0162] Below a wireless communication performed by the electronic
equipment 600 which serves as a user equipment in a wireless
communication system according to embodiments of the present
disclosure will be described in detail.
[0163] FIG. 16 is a flowchart showing a wireless communication
method performed by the electronic equipment 600 which serves as a
user equipment in a wireless communication system according to an
embodiment of the present disclosure.
[0164] As shown in FIG. 16, in step S1610, a Transmission
Configuration Indication TCI state is received from a network side
device.
[0165] Next, in step S1620, a received beam for receiving downlink
information from the network side device is determined based on the
TCI state.
[0166] In an embodiment, the method further includes: transmitting,
to the network side device, information about N candidate
transmitted beams for selecting, by the network side device, a
transmitted beam for transmitting downlink information to the
electronic equipment 600 from the N candidate transmitted beams,
and determine the TCI state based on the selected transmitted beam,
where N is an integer greater than 1.
[0167] In an embodiment, the method further includes: determining
the N candidate transmitted beams based on channel quality between
K transmitted beams of the network side device and the electronic
equipment 600, where K is an integer greater than or equal to
N.
[0168] In an embodiment, the method further includes: determining
the channel quality based on one or more of parameters including
Reference Signal Receiving Power RSRP, Reference Signal Receiving
Quality RSRQ, and Block Error Rate BLER.
[0169] In an embodiment, the method further includes: periodically
transmitting the information about the N candidate transmitted
beams to the network side device; or transmitting the information
about the N candidate transmitted beams in response to a request of
the network side device.
[0170] In an embodiment, the information about the N candidate
transmitted beams includes identification information of the N
candidate transmitted beams.
[0171] In an embodiment, the method further includes: expressing
the identification of each of the N candidate transmitted beams by
using binary coding.
[0172] In an embodiment, the method further includes: expressing
the identification of the N candidate transmitted beams by using a
bit map.
[0173] In an embodiment, the method further includes: expressing
the identification of a reference candidate transmitted beam in the
N candidate transmitted beams by using the binary coding, and
expressing the identification of other candidate transmitted beams
in addition to the reference candidate transmitted beam in the N
candidate transmitted beams by using binary coding of a difference
value between identifications of other candidate transmitted beams
and the reference candidate transmitted beam.
[0174] In an embodiment, the method further includes: based on a
first mapping table and an unordered combination of the N candidate
transmitted beams, determining combination identification
corresponding to the combination, and expressing the identification
of the N candidate transmitted beams by using the combination
identification, where the first mapping table stores a mapping
relation between the combination of the N candidate transmitted
beams selected from the K transmitted beams of the network side
device and the combination identification, where K is an integer
greater than or equal to N.
[0175] In an embodiment, the method further includes: the
information about the N candidate transmitted beams including order
information of the N candidate transmitted beams.
[0176] In an embodiment, the method further includes: based on a
second mapping table and an ordered arrangement of the N candidate
transmitted beams, determining arrangement identification
corresponding to the arrangement; and expressing identification and
order of the N candidate transmitted beams by using the arrangement
identification, where the second mapping table stores a mapping
relation between the arrangement of the N candidate transmitted
beams selected from the K transmitted beams of the network side
device and the arrangement identification, where K is an integer
greater than or equal to N.
[0177] In an embodiment, the information about the N candidate
transmitted beams includes channel quality information between all
or a part of candidate transmitted beams in the N candidate
transmitted beams and the electronic equipment 600.
[0178] In an embodiment, determining a received beam for receiving
downlink information from the network side device based on the TCI
state includes: determining, based on a mapping relation between
the TCI state and a beam for transmitting a Synchronization Signal
Block SSB, a beam for transmitting the SSB; and determining a
received beam for receiving downlink information from the network
side device based on a mapping relation between the beam for
transmitting the SSB and the received beam.
[0179] In an embodiment, the method further includes: after an
initial access is completed, receiving from the network side device
the mapping relation between the TCI state and the beam for
transmitting the SSB.
[0180] In an embodiment, the method further includes: establishing,
in the process of initial access, the mapping relation between the
beam for transmitting the SSB and the received beam.
[0181] In an embodiment, the method further includes: receiving,
from the network side device, configuration information about the
number of the N candidate transmitted beams.
[0182] In an embodiment, the electronic equipment 600 includes user
equipment in a New Radio NR communication system.
[0183] According to an embodiment of the present disclosure, a main
body performing the above method may be the electronic equipment
600 according to an embodiment of the present disclosure, and thus
all of the embodiments described above with respect to the
electronic equipment 600 are applicable thereto.
5. Application Example
[0184] The technology according to the present disclosure may be
applied in various productions.
[0185] The network side device may be implemented as any type of
TRPs. The TRP may provide both transmitting function and receiving
function, for example, receiving information from a user equipment
and a base station device and transmitting information to the user
equipment and the base station device. In a typical example, the
TRP may provide services to the user equipment and is controlled by
the base station device. Further, the TRP may have a structure
similar to that of the base stations described below, and only may
have a structure related to transmitting and receiving information
in the base station device.
[0186] The network side device may also be implemented as any type
of base stations such as a macro eNB and a small eNB, and further
be implemented as any type of gNB. The small eNB may be an eNB such
as a pico eNB, a micro eNB, and a home (femto) eNB that covers a
cell smaller than a macro cell. Alternatively, the base station may
be implemented as any other types of base stations, such as a NodeB
and a base transceiver station (BTS). The base station may include
a main body (also referred to as base station device) configured to
control wireless communication, and one or more remote radio heads
(RRH) located at positions different from the main body.
[0187] The user equipment may be realized as a mobile terminal
(such as a smart phone, a tablet personal computer (PC), a notebook
PC, a portable game terminal, a portable/dongle type mobile router,
and a digital camera device), or an in-vehicle terminal (such as a
vehicle navigation device). The user equipment may also be
implemented as a terminal (that is also referred to as a machine
type communication (MTC) terminal) that performs machine-to-machine
(M2M) communication. Furthermore, the user equipment may be a
wireless communication module (such as an integrated circuit module
including a single chip) mounted on each of the above user
equipments.
APPLICATION EXAMPLES OF A BASE STATION
First Application Example
[0188] FIG. 17 is a block diagram illustrating a first example of a
schematic configuration of an eNB to which the technology of the
present disclosure may be applied. An eNB 1700 includes one or more
antennas 1710 and a base station device 1720. The base station
device 1720 and each of the antennas 1710 may be connected to each
other via an RF cable
[0189] Each of the antennas 1710 includes a single antenna element
or multiple antenna elements (such as multiple antenna elements
included in the multiple-input multiple-output (MIMO) antenna), and
is used for transmitting and receiving a radio signal by the base
station device 1720. The eNB 1700 may include multiple antennas
1710, as shown in FIG. 17. For example, the multiple antennas 1710
may be compatible with multiple frequency bands used by the eNB
1700. Although FIG. 17 shows an example in which the eNB 1700
includes the multiple antennas 1710, the eNB 1700 may also include
a single antenna 1710.
[0190] The base station device 1720 includes a controller 1721, a
memory 1722, a network interface 1723, and a wireless communication
interface 1725.
[0191] The controller 1721 may be, for example, a CPU or a DSP, and
operates various functions of a higher layer of the base station
device 1720. For example, the controller 1721 generates a data
packet based on data in signals processed by the wireless
communication interface 1725, and transfers the generated packet
via the network interface 1723. The controller 1721 may bundle data
from multiple base band processors to generate the bundled packet,
and transfer the generated bundled packet. The controller 1721 may
include logical functions of performing control such as radio
resource control, radio bearer control, mobility management,
admission control, and scheduling. The control may be performed in
corporation with an eNB or a core network node in the vicinity. The
memory 1722 includes an RAM and an ROM, and stores a program that
is executed by the controller 1721, and various types of control
data (such as a terminal list, transmission power data, and
scheduling data).
[0192] The network interface 1723 is a communication interface for
connecting the base station device 1720 to a core network 1724. The
controller 1721 may communicate with a core network node or another
eNB via the network interface 1723. In that case, the eNB 1700, and
the core network node or the other eNB may be connected to each
other through a logical interface (such as an S1 interface and an
X2 interface). The network interface 1723 may also be a wired
communication interface or a wireless communication interface for
radio backhaul. If the network interface 1723 is a wireless
communication interface, the network interface 1723 may use a
higher frequency band for wireless communication than a frequency
band used by the wireless communication interface 1725.
[0193] The wireless communication interface 1725 supports any
cellular communication schemes (such as long term evolution (LTE)
and LTE-advanced), and provides a wireless connection to a terminal
located in a cell of the eNB 1700 via the antenna 1710. The
wireless communication interface 1725 may generally include, for
example, a baseband (BB) processor 1726 and an RF circuit 1727. The
BB processor 1726 may perform, for example, coding/decoding,
modulation/demodulation and multiplexing/de-multiplexing, and
perform various types of signal processes of the layer (for example
L1, medium access control (MAC), wireless link control (RLC) and
packet data convergence protocol (PDCP)). Instead of the controller
1721, the BB processor 1726 may include some or all of the above
logical functions. The BB processor 1726 may be a memory storing
communication control programs, or a module including a processor
and related circuit configured to perform the program. Updating the
program may allow the functions of the BB processor 1726 to be
changed. The module may be a card or a blade that is inserted into
a slot of the base station device 1720. Alternatively, the module
may also be a chip that is mounted on the card or the blade. In
addition, the RF circuit 1727 may include, for example, a frequency
mixer, a filter, and an amplifier, and transmits and receives a
radio signal via the antenna 1710.
[0194] The wireless communication interface 1725 may include the
multiple BB processors 1726, as shown in FIG. 17. For example, the
multiple BB processors 1726 may be compatible with multiple
frequency bands used by the eNB 1700. The wireless communication
interface 1725 may include the multiple RF circuits 1727, as shown
in FIG. 17. For example, the multiple RF circuits 1727 may be
compatible with multiple antenna elements. Although FIG. 17 shows
an example in which the wireless communication interface 1725
includes multiple BB processors 1726 and multiple RF circuits 1727,
the wireless communication interface 1725 may include a single BB
processor 1726 or a single RF circuit 1727.
Second Application Example
[0195] FIG. 18 is a block diagram showing a second example of a
schematic configuration of an eNB to which the technology of the
present disclosure may be applied. An eNB 1830 includes one or more
antennas 1840, a base station device 1850 and an RRH 1860. The RRH
1860 and each of the antennas 1840 may be connected to each other
via an RF cable. The base station device 1850 and the RRH 1860 may
be connected to each other via a high speed line such as an optical
fiber cable.
[0196] Each of the antennas 1840 includes a single antenna element
or multiple antenna elements (such as multiple antenna elements
included in an MIMO antenna), and is used for transmitting and
receiving a radio signal by the RRH 1860. As shown in FIG. 18, the
eNB 1830 may include multiple antennas 1840. For example, the
multiple antennas 1840 may be compatible with multiple frequency
bands used by the eNB 1830. Although FIG. 18 shows an example in
which the eNB 1830 includes the multiple antennas 1840, the eNB
1830 may also include a single antenna 1840.
[0197] The base station device 1850 includes a controller 1851, a
memory 1852, a network interface 1853, a wireless communication
interface 1855, and a connection interface 1857. The controller
1851, the memory 1852, and the network interface 1853 are the same
as the controller 1721, the memory 1722, and the network interface
1723 described with reference to FIG. 17.
[0198] The wireless communication interface 1855 supports any
cellular communication schemes (such as the LTE and the
LTE-advanced), and provides a wireless connection to a terminal
located in the a sector corresponding to the RRH 1860 via the RRH
1860 and the antenna 1840. The wireless communication interface
1855 may generally include, for example, a baseband (BB) processor
1856. Except for the BB processor 1856 being connected to a RF
circuit 1864 of the RRH 1860 via the connection interface 1857, the
BB processor 1856 is the same as the BB processor 1726 described
with reference to FIG. 17. The wireless communication interface
1855 may include multiple BB processors 1856, as shown in FIG. 18.
For example, the multiple BB processors 1856 may be compatible with
multiple frequency bands used by the eNB 1830. Although FIG. 18
shows an example in which the wireless communication interface 1855
includes multiple BB processors 1856, the wireless communication
interface 1855 may also include a single BB processor 1856.
[0199] The connection interface 1857 is an interface for connecting
the base station device 1850 (wireless communication interface
1855) to the RRH 1860. The connection interface 1857 may also be a
communication module for communication in the above high-speed line
that connects the base station device 1850 (the wireless
communication interface 1855) to the RRH 1860.
[0200] The RRH 1860 includes a connection interface 1861 and a
wireless communication interface 1863.
[0201] The connection interface 1861 is an interface for connecting
the RRH 1860 (wireless communication interface 1863) to the base
station device 1850. The connection interface 1861 may also be a
communication module for communication in the above-described
high-speed line.
[0202] The wireless communication interface 1863 transmits and
receives a radio signal via the antenna 1840. The wireless
communication interface 1863 may generally include, for example,
the RF circuit 1864. The RF circuit 1864 may include, for example,
a frequency mixer, a filter, and an amplifier, and transmits and
receives a radio signal via the antenna 1840. The wireless
communication interface 1863 may include multiple RF circuits 1864,
as shown in FIG. 18. For example, the multiple RF circuits 1864 may
support multiple antenna elements. Although FIG. 18 shows an
example in which the wireless communication interface 1863 includes
the multiple RF circuits 1864, the wireless communication interface
1863 may also include a single RF circuit 1864.
[0203] In the eNB 1700 and the eNB 1830 shown in FIG. 17 and FIG.
18, the selecting unit 220, the determining unit 230, the decoding
unit 240, the establishing unit 250 and the storing unit 260
described with reference to FIG. 2 may be implemented by the
controller 1721 and/or the controller 1851, and the communication
unit 210 described with reference to FIG. 2 may be implemented by
the wireless communication interface 1725 and the wireless
communication interface 1855 and/or the wireless communication
interface 1863. At least a part of the functions may be implemented
by a controller 1721 and a controller 1851. For example, the
controller 1721 and/or the controller 1851 may perform a function
of selecting a transmitted beam and determining a TCI state by
executing instructions stored in the corresponding memory.
APPLICATION EXAMPLE OF A TERMINAL DEVICE
First Application Example
[0204] FIG. 19 is a block diagram illustrating an example of a
schematic configuration of a smart phone 1900 to which the
technology of the present disclosure may be applied. The smart
phone 1900 includes a processor 1901, a memory 1902, a storage
device 1903, an external connection interface 1904, a camera device
1906, a sensor 1907, a microphone 1908, an input device 1909, a
display device 1910, a speaker 1911, a wireless communication
interface 1912, one or more antenna switches 1915, one or more
antennas 1916, a bus 1917, a battery 1918 and an auxiliary
controller 1919.
[0205] The processor 1901 may be, for example, a CPU or a system on
chip (SoC), and controls functions of application layer and other
layers of the smart phone 1900. The memory 1902 includes an RAM and
an ROM, and stores programs executed by the processor 1901, and
data. The storage device 1903 may include a storage medium, such as
a semiconductor memory and a hard disk. The external connection
interface 1904 is an interface for connecting an external device
(such as a memory card or a universal serial bus (USB) device) to
the smart phone 1900.
[0206] The camera device 1906 includes an image sensor (such as a
charge coupled device (CCD) and a complementary metal oxide
semiconductor (CMOS)) and generates a captured image. The sensor
1907 may include a set of sensors, such as a measurement sensor, a
gyroscope sensor, a geomagnetic sensor and an acceleration sensor.
The microphone 1908 converts sound inputted into the smart phone
1900 into an audio signal. The input device 1909 includes, for
example, a touch sensor configured to detect touch on a screen of
the display device 1910, a keypad, a keyboard, a button or a
switch, and receives an operation or information inputted by a user
equipment. The display device 1910 includes a screen (such as a
liquid crystal display (LCD) and an organic light emitting diode
(OLED)), and displays an output image from the smart phone 1900.
The speaker 1911 converts an audio signal that is output from the
smart phone 1900 to sound.
[0207] The wireless communication interface 1912 supports any
cellular communication schemes (such as LET and LTE-Advanced), and
performs wireless communication. The wireless communication
interface 1212 may generally include, for example, a BB processor
1913 and an RF circuit 1914. The BB processor 1913 may perform, for
example, encoding/decoding, modulating/demodulating, and
multiplexing/demultiplexing, and performs various types of signal
processing for wireless communication. In addition, the RF circuit
1914 may include, for example, a frequency mixer, a filter and an
amplifier, and transmits and receives a radio signal via the
antenna 1916. The wireless communication interface 1912 may be one
chip module on which the BB processor 1913 and the RF circuit 1914
are integrated. The wireless communication interface 1912 may
include multiple BB processors 1913 and multiple RF circuits 1914,
as shown in FIG. 19. Although FIG. 19 shows an example in which the
wireless communication interface 1912 includes the multiple BB
processors 1913 and the multiple RF circuits 1914, the wireless
communication interface 1912 may also include a single BB processor
1913 or a single RF circuit 1914.
[0208] Furthermore, in addition to a cellular communication scheme,
the wireless communication interface 1912 may support another type
of wireless communication scheme such as a short-distance wireless
communication scheme, a near field communication scheme, and a
wireless local area network (LAN) scheme. In this case, the
wireless communication interface 1912 may include the BB processor
1913 and the RF circuit 1914 for each wireless communication
scheme.
[0209] Each of the antenna switches 1915 switches connection
destinations of the antennas 1916 among multiple circuits (such as
circuits for different wireless communication schemes) included in
the wireless communication interface 1912.
[0210] Each of the antennas 1916 includes a single antenna element
or multiple antenna elements (such as multiple antenna elements
included in an MIMO antenna), and is used for transmitting and
receiving a radio signal by the wireless communication interface
1912. The smart phone 1900 may include multiple antennas 1916, as
shown in FIG. 19. Although FIG. 19 shows an example in which the
smart phone 1900 includes multiple antennas 1916, the smart phone
1900 may also include a single antenna 1916.
[0211] Furthermore, the smart phone 1900 may include the antenna
1916 for each wireless communication scheme. In this case, the
antenna switch 1915 may be omitted from of the configuration of the
smart phone 1900.
[0212] The bus 1917 connects the processor 1901, the memory 1902,
the storage device 1903, the external connection interface 1904,
the camera device 1906, the sensor 1907, the microphone 1908, the
input device 1909, the display device 1910, the speaker 1911, the
wireless communication interface 1912, and the auxiliary controller
1919 to each other. The battery 1918 supplies power to each block
of the smart phone 1900 shown in FIG. 19 via feeder lines, which
are partially shown as dashed lines in the figure. The auxiliary
controller 1919 operates a minimum necessary function of the smart
phone 1900, for example, in a sleep mode.
[0213] In the smart phone 1900 shown in FIG. 19, the determining
unit 620, the selecting unit 630, the encoding unit 640, the
storing unit 650 and the establishing unit 660 described with
reference to FIG. 6 may be implemented by the processor 1901 or the
auxiliary controller 1919, and the communication unit 610 described
with reference to FIG. 6 may be implemented by the wireless
communication interface 1912. At least a part of functions may also
be implemented by the processor 1901 or the auxiliary controller
1919. For example, the processor 1901 or the auxiliary controller
1919 may perform a function of determining a received beam by
executing instructions stored in the memory 1902 or the storage
device 1903.
Second Application Example
[0214] FIG. 20 is a block diagram showing an example of a schematic
configuration of a vehicle navigation device 2020 to which the
technology of the present disclosure may be applied. The vehicle
navigation device 2020 includes a processor 2021, a memory 2022, a
global positioning system (GPS) module 2024, a sensor 2025, a data
interface 2026, a content player 2027, a storage medium interface
2028, an input device 2029, a display device 2030, a speaker 2031,
a wireless communication interface 2033, one or more antenna
switches 2036, one or more antennas 2037 and a battery 2038.
[0215] The processor 2021 may be, for example, a CPU or a SoC, and
controls the navigation function and additional functions of the
vehicle navigation device 2020. The memory 2022 includes an RAM and
an ROM, and stores programs executed by the processor 2021, and
data.
[0216] The GPS module 2024 measures a location of the vehicle
navigation device 2020 (such as a latitude, a longitude and a
height) using a GPS signal received from a GPS satellite. The
sensor 2025 may include a group of sensors such as a gyroscope
sensor, a geomagnetic sensor and an air pressure sensor. The data
interface 2026 is connected to, for example, an in-vehicle network
2041 via a terminal that is not shown, and acquires data (such as
vehicle speed data) generated by the vehicle.
[0217] The content player 2027 reproduces contents stored in a
storage medium (such as a CD and a DVD) which is inserted into the
storage medium interface 2028. The input device 2029 includes, for
example, a touch sensor configured to detect touch on a screen of
the display device 2030, a button, or a switch, and receives an
operation or information inputted by a user equipment. The display
device 2030 includes a screen such as a LCD or an OLED display, and
displays an image of the navigation function or content that is
reproduced. The speaker 2031 outputs a sound of a navigation
function or the reproduced content.
[0218] The wireless communication interface 2033 supports any
cellular communication schemes (such as LTE and LTE-advanced) and
performs wireless communication. The wireless communication
interface 2033 may generally include, for example, a BB processor
2034 and an RF circuit 2035. The BB processor 2034 may perform, for
example, coding/decoding, modulation/demodulation and
multiplexing/de-multiplexing, and perform various types of signal
processing for wireless communications. In addition, the RF circuit
2035 may include, for example, a frequency mixer, a filter and an
amplifier, and transmits and receives a radio signal via the
antenna 2037. The wireless communication interface 2033 may be one
chip module on which the BB processor 2034 and the RF circuit 2035
are integrated. As shown in FIG. 20, the wireless communication
interface 2033 may include multiple BB processors 2034 and multiple
RF circuits 2035. Although FIG. 20 shows an example in which the
wireless communication interface 2033 includes the multiple BB
processors 2034 and the multiple RF circuits 2035, the wireless
communication interface 2033 may also include a single BB processor
2034 or a single RF circuit 2035.
[0219] Furthermore, in addition to a cellular communication scheme,
the wireless communication interface 2033 may support another type
of wireless communication scheme, such as a short-distance wireless
communication scheme, a near field communication scheme and a
wireless LAN scheme. In this case, the wireless communication
interface 2033 may include a BB processor 2034 and an RF circuit
2035 for each wireless communication scheme.
[0220] Each of the antenna switches 2036 switches connection
destinations of the antennas 2037 among multiple circuits (such as
circuits for different wireless communication schemes) included in
the wireless communication interface 2033.
[0221] Each of the antennas 2037 includes a single antenna element
or multiple antenna elements (such as multiple antenna elements
included in a MIMO antenna) and is used for transmitting and
receiving a radio signal by the wireless communication interface
2033. As shown in FIG. 20, the vehicle navigation device 2020 may
include multiple antennas 2037. Although FIG. 20 shows an example
in which the vehicle navigation device 2020 includes multiple
antennas 2037, the vehicle navigation device 2020 may also include
a single antenna 2037.
[0222] Furthermore, the vehicle navigation device 2020 may include
the antenna 2037 for each wireless communication scheme. In this
case, the antenna switch 2036 may be omitted from the configuration
of the vehicle navigation device 2020.
[0223] The battery 2038 supplies power to each block of the vehicle
navigation device 2020 shown in FIG. 20 via feeder lines, which are
partially shown as dashed lines in the figure. The battery 2038
accumulates the power supplied from the vehicle.
[0224] In the vehicle navigation device 2020 shown in FIG. 20, the
determining unit 620 the selecting unit 630, the encoding unit 640,
the storing unit 650 and the establishing unit 660 described with
reference to FIG. 6 may be implemented by the processor 2021, and
the communication unit 610 described with reference to FIG. 6 may
be implemented by the wireless communication interface 2033. At
least a part of functions may also be implemented by the processor
2021. For example, the processor 2021 may perform a function of
determining a received beam by executing instructions stored in the
memory 2022.
[0225] The technology of the present disclosure may also be
implemented as an in-vehicle system (or a vehicle) 2040 including
the vehicle navigation device 2020, an in-vehicle network 2041 and
one or more blocks of a vehicle module 2042. The vehicle module
2042 generates vehicle data (such as vehicle speed, motor speed and
fault information), and outputs the generated data to the
in-vehicle network 2041.
[0226] The preferred embodiments of the present disclosure have
been described above with reference to the drawings, but the
present disclosure is not limited to the above examples. Those
skilled in the art can make various changes and modifications
within the scope of the appended claims, and it should be
understood that such changes and modifications naturally fall
within the technical scope of the present disclosure.
[0227] For example, units shown by dashed boxes in functional block
diagrams shown in the drawings indicate that the functional units
are optional in the respective devices, and the various optional
functional units may be combined in an appropriate manner to
implement the required features.
[0228] For example, multiple functions included in a unit in the
above embodiments may be implemented by separate devices.
Alternatively, multiple functions implemented by multiple units in
the above embodiments may be implemented by separate devices,
respectively. In addition, one of the above functions may be
implemented by multiple units. Needless to say, such configuration
is included in the technical scope of the present disclosure.
[0229] In the specification, steps described in the flowchart
include not only the processing performed chronologically, but also
the processing performed in parallel or individually rather than
chronologically. Furthermore, even in the step of processing in
time series, the order can be appropriately changed.
[0230] In addition, according to the present disclosure, the
following configuration can be performed. [0231] (1) An electronic
equipment including a processing circuit configured to: [0232]
receive, from a user equipment, information about N candidate
transmitted beams, where N is an integer greater than 1; [0233]
select, from the N candidate transmitted beams, a transmitted beam
for transmitting downlink information to the user equipment; and
[0234] determine a Transmission Configuration Indication TCI state
according to the selected transmitted beam, and transmit the TCI
state to the user equipment. [0235] (2) The electronic equipment
according to item (1), where the processing circuit is further
configured to: [0236] determine identification information of the N
candidate transmitted beams according to the information about the
N candidate transmitted beams. [0237] (3) The electronic equipment
according to item (2), where the processing circuit is further
configured to: [0238] determine order information of the N
candidate transmitted beams according to the information about the
N candidate transmitted beams; and [0239] select a transmitted beam
for transmitting downlink information to the user equipment
according to the order information of the N candidate transmitted
beams. [0240] (4) The electronic equipment according to item (2),
where the processing circuit is further configured to: [0241]
determine channel quality information between all or a part of
candidate transmitted beams in the N candidate transmitted beams
and the user equipment according to the information about the N
candidate transmitted beams; and [0242] select a transmitted beam
for transmitting downlink information to the user equipment
according to the channel quality information between the all or a
part of candidate transmitted beams and the user equipment. [0243]
(5) The electronic equipment according to item (1), where the
processing circuit is further configured to: [0244] determine a
beam for transmitting a Synchronization Signal Block SSB
corresponding to the selected transmitted beam; and [0245]
determine a TCI state to be transmitted to the user equipment
according to a mapping relation between the TCI state and the beam
for transmitting the SSB. [0246] (6) The electronic equipment
according to item (5), where a radiation range of the selected
transmitted beam is within a radiation range of the beam for
transmitting the SSB corresponding to the selected transmitted
beam. [0247] (7) The electronic equipment according to item (5),
where the processing circuit is further configured to: [0248] after
an initial access is completed, establish a mapping relation
between the TCI state and the beam for transmitting the SSB; and
[0249] transmit, to the user equipment, the mapping relation
between the TCI state and the beam for transmitting the SSB. [0250]
(8) The electronic equipment according to item (1), where the
processing circuit is further configured to: [0251] periodically
receive, from the user equipment, the information about the N
candidate transmitted beams, or [0252] send a request to the user
equipment to obtain the information about the N candidate
transmitted beams. [0253] (9) The electronic equipment according to
any one of items (1) to (8), where the electronic equipment
includes a network side device in a New Radio NR communication
system. [0254] (10) An electronic equipment including a processing
circuit configured to: [0255] receive, from a network side device,
a Transmission Configuration Indication TCI state; and [0256]
determine a received beam for receiving downlink information from
the network side device according to the TCI state. [0257] (11) The
electronic equipment according to item (10), where the processing
circuit is further configured to: [0258] transmit, to the network
side device, information about N candidate transmitted beams for
selecting, by the network side device, a transmitted beam for
transmitting downlink information to the electronic equipment from
the N candidate transmitted beams, and determine the TCI state
according to the selected transmitted beam, where N is an integer
greater than 1. [0259] (12) The electronic equipment according to
item (10), where the processing circuit is further configured to:
[0260] determine the N candidate transmitted beams according to
channel quality between K transmitted beams of the network side
device and the electronic equipment, where K is an integer greater
than or equal to N. [0261] (13) The electronic equipment according
to item (12), where the processing circuit is further configured
to: [0262] determine the channel quality according to one or more
of parameters including Reference Signal Receiving Power RSRP,
Reference Signal Receiving Quality RSRQ, and Block Error Rate BLER.
[0263] (14) The electronic equipment according to item (11), where
the processing circuit is further configured to: [0264]
periodically transmit the information about the N candidate
transmitted beams to the network side device; or [0265] transmit
the information about the N candidate transmitted beams in response
to a request of the network side device. [0266] (15) The electronic
equipment according to item (11), where the information about the N
candidate transmitted beams includes identification information of
the N candidate transmitted beams. [0267] (16) The electronic
equipment according to item (15), where the processing circuit is
further configured to express identification of the N candidate
transmitted beams in any means of: [0268] expressing the
identification of each of the N candidate transmitted beams by
using binary coding; [0269] expressing the identification of the N
candidate transmitted beams by using a bit map; [0270] expressing
the identification of a reference candidate transmitted beam in the
N candidate transmitted beams by using the binary coding, and
expressing the identification of other candidate transmitted beams
in addition to the reference candidate transmitted beam in the N
candidate transmitted beams by using binary coding of a difference
value between identifications of other candidate transmitted beams
and the reference candidate transmitted beam; and [0271] according
to a first mapping table and an unordered combination of the N
candidate transmitted beams, determining combination identification
corresponding to the combination, and expressing the identification
of the N candidate transmitted beams by using the combination
identification, wherein the first mapping table stores a mapping
relation between the combination of the N candidate transmitted
beams selected from the K transmitted beams of the network side
device and the combination identification, wherein K is an integer
greater than or equal to N. [0272] (17) The electronic equipment
according to item (15), where the information about the N candidate
transmitted beams includes order information of the N candidate
transmitted beams. [0273] (18) The electronic equipment according
to item (17), where the processing circuit is further configured
to: [0274] according to a second mapping table and an ordered
arrangement of the N candidate transmitted beams, determine
arrangement identification corresponding to the arrangement; and
[0275] express identification and order of the N candidate
transmitted beams by using the arrangement identification, [0276]
where the second mapping table stores a mapping relation between
the arrangement of the N candidate transmitted beams selected from
the K transmitted beams of the network side device and the
arrangement identification, where K is an integer greater than or
equal to N. [0277] (19) The electronic equipment according to item
(15), where the information about the N candidate transmitted beams
includes channel quality information between all or a part of
candidate transmitted beams in the N candidate transmitted beams
and the electronic equipment. [0278] (20) The electronic equipment
according to item (10), where the processing circuit is further
configured to: [0279] determine, according to a mapping relation
between the TCI state and a beam for transmitting a Synchronization
Signal Block SSB, a beam for transmitting the SSB; and [0280]
determine a received beam for receiving downlink information from
the network side device according to a mapping relation between the
beam for transmitting the SSB and the received beam. [0281] (21)
The electronic equipment according to item (20), where the
processing circuit is further configured to: [0282] after an
initial access is completed, receive from the network side device
the mapping relation between the TCI state and the beam for
transmitting the SSB. [0283] (22) The electronic equipment
according to item (20), where the processing circuit is further
configured to: [0284] establish, in the process of initial access,
the mapping relation between the beam for transmitting the SSB and
the received beam. [0285] (23) The electronic equipment according
to item (11), where the processing circuit is further configured
to: [0286] receive, from the network side device, configuration
information about a number of the N candidate transmitted beams.
[0287] (24) The electronic equipment according to any one of items
(10) to (23), where the electronic equipment includes user
equipment in a New Radio NR communication system. [0288] (25) A
wireless communication method, including: [0289] receiving, from a
user equipment, information about N candidate transmitted beams,
where N is an integer greater than 1; [0290] selecting, from the N
candidate transmitted beams, a transmitted beam for transmitting
downlink information to the user equipment; and [0291] determining
a Transmission Configuration Indication TCI state according to the
selected transmitted beam, and transmitting the TCI state to the
user equipment. [0292] (26) A wireless communication method,
including: [0293] receiving, from a network side device, a
Transmission Configuration Indication TCI state; and [0294]
determining a received beam for receiving downlink information from
the network side device according to the TCI state. [0295] (27) A
computer-readable storage medium including computer-executable
instructions which, when executed by a computer, cause the computer
to perform the wireless communication method according to items
(25) or (26).
[0296] Although the embodiments of the present disclosure have been
described above in detail in conjunction with the drawings, it
should be understood that the embodiments described above are
merely illustrative but not limitative of the present disclosure.
Those skilled in the art can make various modifications and changes
to the above embodiments without departing from the spirit and
scope of the present disclosure. Therefore, the scope of the
present disclosure is defined only by the appended claims and their
equivalents.
* * * * *