U.S. patent application number 13/504921 was filed with the patent office on 2013-08-15 for component carrier uplink maximum transmission power reporting scheme for carrier aggregation.
The applicant listed for this patent is Rongzhen Yang, Xiangying Yang. Invention is credited to Rongzhen Yang, Xiangying Yang.
Application Number | 20130208666 13/504921 |
Document ID | / |
Family ID | 45218845 |
Filed Date | 2013-08-15 |
United States Patent
Application |
20130208666 |
Kind Code |
A1 |
Yang; Rongzhen ; et
al. |
August 15, 2013 |
COMPONENT CARRIER UPLINK MAXIMUM TRANSMISSION POWER REPORTING
SCHEME FOR CARRIER AGGREGATION
Abstract
Embodiments of the present disclosure describe method,
apparatus, and system configurations for reporting uplink maximum
transmission power for each component carrier of a carrier
aggregation scheme. A method includes establishing, by a user
equipment (UE), a communication link with an enhanced node B (eNB)
station of an Internet Protocol (IP) based wireless communication
network, and sending, by the UE to the eNB station, a message that
includes information for a Power Headroom Report (PHR) and a value
that indicates an uplink maximum transmission power P.sub.CMAX, c
for individual active component carriers of a carrier aggregation
scheme. Other embodiments may be described and/or claimed.
Inventors: |
Yang; Rongzhen; (Shanghai,
CN) ; Yang; Xiangying; (Portland, OR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Yang; Rongzhen
Yang; Xiangying |
Shanghai
Portland |
OR |
CN
US |
|
|
Family ID: |
45218845 |
Appl. No.: |
13/504921 |
Filed: |
August 25, 2011 |
PCT Filed: |
August 25, 2011 |
PCT NO: |
PCT/US11/49232 |
371 Date: |
November 27, 2012 |
Related U.S. Patent Documents
|
|
|
|
|
|
Application
Number |
Filing Date |
Patent Number |
|
|
61410740 |
Nov 5, 2010 |
|
|
|
Current U.S.
Class: |
370/329 |
Current CPC
Class: |
H04W 40/24 20130101;
H04W 52/34 20130101; Y02D 70/146 20180101; H04B 7/024 20130101;
H04W 72/06 20130101; Y02D 70/144 20180101; H04L 1/20 20130101; Y02D
70/1242 20180101; Y02D 70/1264 20180101; Y02D 70/142 20180101; H04L
5/0048 20130101; H04L 2001/0097 20130101; H04W 24/10 20130101; Y02D
70/1224 20180101; H04B 7/0617 20130101; H04B 7/0639 20130101; H04B
7/0482 20130101; Y02D 30/70 20200801; H04L 1/009 20130101; H04W
72/0473 20130101; H04W 52/146 20130101; H04B 7/0413 20130101; H04B
7/0652 20130101; Y02D 70/1262 20180101; H04B 7/0456 20130101; H04W
72/042 20130101; Y02D 70/444 20180101; H04B 7/0452 20130101; Y02D
70/164 20180101; H04W 52/0209 20130101; H04L 2001/0093 20130101;
Y02D 70/168 20180101; H04W 52/365 20130101 |
Class at
Publication: |
370/329 |
International
Class: |
H04W 72/04 20060101
H04W072/04 |
Claims
1. A method comprising: establishing, by a user equipment (UE), a
communication link with an enhanced node B (eNB) of an Internet
Protocol (IP)-based wireless communication network; and sending, by
the UE to the eNB, a message that includes information for a Power
Headroom Report (PHR) and a value that indicates an uplink maximum
transmission power for individual active component carriers of a
carrier aggregation scheme, wherein the value that indicates the
uplink maximum transmission power for individual active component
carriers of the carrier aggregation scheme is a quantized nominal
value that is sent by the UE to the eNB for the eNB to schedule
resources for uplink transmission by the UE.
2. The method of claim 1, wherein sending the message is performed
during establishment of the communication link.
3. The method of claim 2, further comprising: sending, by the UE to
the eNB, another message that includes updated information for a
Power Headroom Report (PHR) and another value that indicates an
updated uplink maximum transmission power for individual active
component carriers of the carrier aggregation scheme.
4. The method of claim 3, wherein sending the other message is
performed periodically or based on occurrence of an event.
5. The method of claim 1, wherein the information for the PHR
comprises a power headroom value that indicates a difference
between the uplink maximum transmission power and an estimated
transmission power for individual active component carriers of the
carrier aggregation scheme.
6. (canceled)
7. The method of claim 1, wherein the message is a second message
that is sent subsequent to a first message, the method further
comprising: sending, by the UE to the eNB, the first message to
report a base value of the uplink maximum transmission power for
individual active component carriers of the carrier aggregation
scheme, wherein the first message comprises one or more bits to
indicate the base value, the base value being a nominal value of
the uplink maximum transmission power, and wherein the second
message comprises one or more bits to differentially indicate an
updated value of the uplink maximum transmission power relative to
the base value.
8. The method of claim 7, wherein: sending the first message is
performed during establishment of the communication link; and
wherein the first message comprises eight bits to indicate the base
value and is sent independent of messages sent for the PHR, and the
second message comprises four bits to differentially indicate the
updated value relative to the base value.
9. The method of claim 7, further comprising: subsequent to sending
the first message, sending, by the UE to the eNB, a third message
to report another base value of the uplink maximum transmission
power for individual active component carriers of the carrier
aggregation scheme, wherein the other base value is a nominal value
of the uplink maximum transmission power, and wherein the third
message is sent based upon a difference between a measured uplink
maximum transmission power and the reported base value being
greater than a predetermined threshold.
10. The method of claim 9, wherein the first message, the second
message, and the third message each comprise a Media Access Control
(MAC) layer message.
11. A user equipment (UE) comprising: an antenna; a processor
configured to communicate with an enhanced node B (eNB) of an
Internet Protocol (IP)-based wireless communication network via the
antenna; and a storage medium coupled to the processor, the storage
medium having instructions stored thereon, that if executed by the
processor, result in the UE: sending to the eNB a message to report
a base value of an uplink transmission power for individual active
component carriers of a carrier aggregation scheme; and subsequent
to sending the message, sending another message that includes
information for a Power Headroom Report (PHR) and a value that
differentially indicates an uplink transmission power for
individual active component carriers of a carrier aggregation
scheme relative to the base value, wherein the base value of the
uplink transmission power is reported to the eNB station for the
eNB station to schedule resources for uplink transmission by the
apparatus.
12. The UE of claim 11, wherein the instructions, if executed by
the processor, further result in the UE: establishing a
communication link with the eNB, wherein sending the message is
performed during establishment of the communication link.
13. The UE of claim 11, wherein the information for the PHR
comprises a power headroom value that indicates a difference
between the uplink transmission power and an estimated transmission
power for the individual active component carriers of the carrier
aggregation scheme.
14. The UE of claim 11, wherein sending the other message is
performed periodically or based on occurrence of an event.
15. (canceled)
16. The UE of claim 11, wherein the message comprises one or more
bits to indicate the base value, the base value being a quantized
nominal value of the uplink transmission power, and wherein the
other message comprises one or more bits to differentially indicate
an updated value of the uplink transmission power relative to the
base value.
17. The UE of claim 16, wherein: the message comprises eight bits
to indicate the base value and is sent independent of messages sent
for the PHR; and the another message comprises four bits to
differentially indicate the updated value relative to the base
value.
18. The UE of claim 16, wherein the message is a first message and
the other message is a second message, and wherein the
instructions, if executed, further result in the UE: subsequent to
sending the first message, sending to the eNB, a third message to
report another base value of the uplink transmission power for
individual active component carriers of the carrier aggregation
scheme, wherein the another base value is a quantized nominal value
of the uplink transmission power, and wherein the third message is
sent based upon a difference between a measured uplink transmission
power and the reported base value being greater than a
predetermined threshold.
19. The UE of claim 18, wherein the first message, the second
message, and the third message each comprise a Media Access Control
(MAC) layer message.
20. The UE of claim 11, wherein the uplink transmission power is a
maximum transmission power.
21. A method comprising: establishing, by an enhanced node B (eNB)
of an Internet Protocol (IP)-based wireless communication network,
a communication link with a user equipment (UE); receiving, by the
eNB from the UE, a message that includes a value that indicates an
uplink maximum transmission power for individual active component
carriers of a carrier aggregation scheme; and scheduling, by the
eNB, resources for uplink transmission by the UE based on the
received message, wherein receiving the message is performed during
establishment of the communication link.
22. (canceled)
23. The method of claim 21, further comprising: receiving, by the
eNB from the UE, another message that includes another value that
indicates an updated uplink maximum transmission power for
individual active component carriers of a carrier aggregation
scheme.
24. The method of claim 23, wherein the another message is sent by
the UE to the eNB based upon a difference between the another value
and the value being greater than a pre-determined threshold.
25. The method of claim 24, wherein: the message and the another
message each comprise a Media Access Control (MAC) layer message
that is received independent of Power Headroom Reporting (PHR)
received by the eNB; and the value and the another value each
comprise a quantized nominal value of the uplink maximum
transmission power.
26. An enhanced node B (eNB) comprising: a processor configured to
communicate with a user equipment (UE) via an Internet Protocol
(IP)-based wireless communication network; and a storage medium
coupled to the processor, the storage medium having instructions
stored thereon, that if executed by the processor, result in the
eNB: establishing a communication link with the UE; receiving, from
the UE, a message that includes a value that indicates an uplink
transmission power for individual active component carriers of a
carrier aggregation scheme, wherein the message is received
independent of Power Headroom Reporting (PHR) received by the eNB,
wherein receiving the message is performed during establishment of
the communication link; and scheduling, by the eNB, resources for
uplink transmission by the UE based on the received message.
27. (canceled)
28. The eNB of claim 26, wherein the instructions, if executed,
further result in the eNB: receiving, from the UE, another message
that includes another value that indicates an updated uplink
transmission power for individual active component carriers of a
carrier aggregation scheme.
29. The eNB of claim 28, wherein the another message is sent by the
UE to the eNB based upon a difference between the updated uplink
transmission power of the UE and the uplink transmission power
received by the eNB in the message being greater than a
pre-determined threshold.
30. The eNB of claim 29, wherein: the message and the another
message each comprise a Media Access Control (MAC) layer message;
the other message is received independent of Power Headroom
Reporting (PHR) received by the eNB; the value and the other value
each comprise a quantized nominal value of the uplink transmission
power; and the uplink transmission power is a maximum transmission
power.
31. An apparatus to be employed in a user equipment (UE), the
apparatus comprising: a communication module to facilitate
communication using carrier aggregation over a plurality of active
component carriers in a wireless communication network; and a power
headroom control module to send to an enhanced node B (eNB) of the
wireless communication network a message including information
about power headroom and information that indicates an uplink
maximum transmission power of individual active component carriers
of the plurality of active component carriers, wherein the
information about the power headroom indicates a difference between
the uplink maximum transmission power and an estimated transmission
power of the individual active component carriers.
32. The apparatus of claim 31, wherein the power headroom control
module is to send to the eNB another message that includes updated
information about power headroom and information that indicates an
updated uplink maximum transmission power of the individual active
component carriers.
33. The apparatus of claim 32, wherein the power headroom control
module is to send the other message based on a timer.
34. The apparatus of claim 31, wherein the power headroom control
module and the communication module are integrated in a System on
Chip (SoC).
35. A UE comprising: the apparatus of claim 31; and an antenna
coupled with the communication module, the antenna for use in
communication with the eNB, wherein the UE is a mobile phone.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] The present application claims priority to U.S. Provisional
Patent Application No. 61/410,740, filed Nov. 5, 2010, the entire
specification of which is hereby incorporated by reference in its
entirety for all purposes, except for those sections, if any, that
are inconsistent with this specification.
FIELD
[0002] Embodiments of the present disclosure generally relate to
the field of wireless communication systems, and more particularly,
to methods, apparatus, and system configurations for reporting
uplink maximum transmission power for each component carrier of a
carrier aggregation scheme.
BACKGROUND
[0003] Mobile networks that facilitate transfer of information at
broadband rates continue to be developed and deployed. Such
networks may be colloquially referred to herein as broadband
wireless access (BWA) networks and may include networks operating
in conformance with one or more protocols specified by the 3.sup.rd
Generation Partnership Project (3GPP) and its derivatives, the
WiMAX Forum, or the Institute for Electrical and Electronic
Engineers (IEEE) 802.16 standards (e.g., IEEE 802.16-2005
Amendment), although the embodiments discussed herein are not so
limited. IEEE 802.16 compatible BWA networks are generally referred
to as WiMAX networks, an acronym that stands for Worldwide
Interoperability for Microwave Access, which is a certification
mark for products that pass conformity and interoperability tests
for the IEEE 802.16 standards.
[0004] A variety of different device types may be used in broadband
wireless technologies. Such devices may include, for example,
personal computers, handheld devices, and other consumer
electronics such as music players, digital cameras, etc., that are
configured to communicate over the wireless broadband networks.
[0005] Carrier aggregation is a feature in emerging wireless
systems that allows user equipment (UE) to concurrently utilize
radio resources from multiple carrier frequencies using component
carriers. Schemes for reporting of uplink maximum power
transmission for individual component carriers of a carrier
aggregation scheme are needed.
BRIEF DESCRIPTION OF THE DRAWINGS
[0006] Embodiments will be readily understood by the following
detailed description in conjunction with the accompanying drawings.
To facilitate this description, like reference numerals designate
like structural elements. Embodiments are illustrated by way of
example and not by way of limitation in the figures of the
accompanying drawings.
[0007] FIG. 1 schematically illustrates an example broadband
wireless access (BWA) network in accordance with some
embodiments.
[0008] FIG. 2 schematically illustrates an example reporting scheme
for uplink maximum transmission power P.sub.CMAX, c in accordance
with some embodiments.
[0009] FIG. 3 schematically illustrates another example reporting
scheme for uplink maximum transmission power P.sub.CMAX, c in
accordance with some embodiments.
[0010] FIG. 4 schematically illustrates yet another example
reporting scheme for uplink maximum transmission power P.sub.CMAX,
c in accordance with some embodiments.
[0011] FIG. 5 is a flow diagram of a method for reporting uplink
maximum transmission power P.sub.CMAX, c in accordance with some
embodiments.
[0012] FIG. 6 is a flow diagram of another method for reporting
uplink maximum transmission power P.sub.CMAX, c in accordance with
some embodiments.
[0013] FIG. 7 is a flow diagram of a method for scheduling
resources for uplink transmission in accordance with some
embodiments.
[0014] FIG. 8 schematically illustrates an example system that may
be used to practice various embodiments described herein.
DETAILED DESCRIPTION
[0015] Embodiments of the present disclosure provide method,
apparatus, and system configurations for reporting uplink
transmission power (e.g., maximum transmission power) for
individual component carriers of a carrier aggregation scheme. In
the following detailed description, reference is made to the
accompanying drawings which form a part hereof, wherein like
numerals designate like parts throughout, and in which is shown by
way of illustration embodiments in which the subject matter of the
present disclosure may be practiced. It is to be understood that
other embodiments may be utilized and structural or logical changes
may be made without departing from the scope of the present
disclosure. Therefore, the following detailed description is not to
be taken in a limiting sense, and the scope of embodiments is
defined by the appended claims and their equivalents.
[0016] Various operations are described as multiple discrete
operations in turn, in a manner that is most helpful in
understanding the claimed subject matter. However, the order of
description should not be construed as to imply that these
operations are necessarily order dependent. In particular, these
operations may not be performed in the order of presentation.
Operations described may be performed in a different order than the
described embodiment. Various additional operations may be
performed and/or described operations may be omitted in additional
embodiments.
[0017] For the purposes of the present disclosure, the phrase "A
and/or B" means (A), (B), or (A and B). For the purposes of the
present disclosure, the phrase "A, B, and/or C" means (A), (B),
(C), (A and B), (A and C), (B and C), or (A, B and C).
[0018] The description may use the phrases "in an embodiment," or
"in embodiments," which may each refer to one or more of the same
or different embodiments. Furthermore, the terms "comprising,"
"including," "having," and the like, as used with respect to
embodiments of the present disclosure, are synonymous.
[0019] As used herein, the term "module" may refer to, be part of,
or include an Application Specific Integrated Circuit (ASIC), an
electronic circuit, a processor (shared, dedicated, or group)
and/or memory (shared, dedicated, or group) that execute one or
more software or firmware programs, a combinational logic circuit,
and/or other suitable components that provide the described
functionality.
[0020] While example embodiments may be described herein in
relation to broadband wireless access networks in general,
embodiments of the present disclosure are not limited thereto and
can be applied to other types of wireless networks where similar
advantages may be obtained. Such networks include, but are not
limited to, wireless local area networks (WLANs), wireless personal
area networks (WPANs) and/or wireless wide area networks (WWANs)
such as cellular networks and the like.
[0021] The following embodiments may be used in a variety of
applications including transmitters and receivers of a mobile
wireless radio system. Radio systems specifically included within
the scope of the embodiments include, but are not limited to,
network interface cards (NICs), network adaptors, base stations,
access points (APs), relay nodes, enhanced node Bs, gateways,
bridges, hubs and satellite radiotelephones. Further, the radio
systems within the scope of embodiments may include satellite
systems, personal communication systems (PCS), two-way radio
systems, global positioning systems (GPS), two-way pagers, personal
computers (PCs) and related peripherals, personal digital
assistants (PDAs), personal computing accessories and all existing
and future arising systems which may be related in nature and to
which the principles of the embodiments could be suitably
applied.
[0022] In some embodiments, a method of the present disclosure
includes establishing, by a user equipment (UE), a communication
link with a base station of an Internet Protocol (IP) based
wireless communication network, and sending, by the UE to the base
station, a message that includes information for a Power Headroom
Report (PHR) and a value that indicates an uplink maximum
transmission power for individual active component carriers of a
carrier aggregation scheme.
[0023] In some embodiments of the method, sending the message is
performed during establishment of the communication link.
[0024] In some embodiments, the method further includes sending, by
the UE to the base station, another message that includes updated
information for a Power Headroom Report (PHR) and another value
that indicates an updated uplink maximum transmission power for
individual active component carriers of the carrier aggregation
scheme. In some embodiments, sending the another message is
performed periodically or based on occurrence of an event.
[0025] In some embodiments, the information for the PHR includes a
power headroom value that indicates a difference between the uplink
maximum transmission power and an estimated transmission power for
individual active component carriers of the carrier aggregation
scheme.
[0026] In some embodiments, the value that indicates the uplink
maximum transmission power for individual active component carriers
of the carrier aggregation scheme is a quantized nominal value that
is sent by the UE to the base station for the base station to
schedule resources for uplink transmission by the UE.
[0027] In some embodiments, the message is a second message that is
sent subsequent to a first message, the method further including
sending, by the UE to the base station, the first message to report
a base value of the uplink maximum transmission power for
individual active component carriers of a carrier aggregation
scheme, wherein the first message includes one or more bits to
indicate the base value, the base value being a nominal value of
the uplink maximum transmission power, and wherein the second
message includes one or more bits to differentially indicate an
updated value of the uplink maximum transmission power relative to
the base value.
[0028] In some embodiments, sending the first message is performed
during establishment of the communication link, wherein the first
message includes 8 bits to indicate the base value and is sent
independent of messages sent for the PHR, and the second message
includes 4 bits to differentially indicate the updated value
relative to the base value.
[0029] In some embodiments, the method further includes, subsequent
to sending the first message, sending, by the UE to the base
station, a third message to report another base value of the uplink
maximum transmission power for individual active component carriers
of the carrier aggregation scheme, wherein the another base value
is a nominal value of the uplink maximum transmission power, and
wherein the third message is sent based upon a difference between a
measured uplink maximum transmission power and the reported base
value being greater than a predetermined threshold.
[0030] In some embodiments, the first message, the second message,
and the third message each include a Media Access Control (MAC)
layer message.
[0031] Embodiments of the present disclosure further include an
apparatus having an antenna, a processor configured to communicate
with a base station of an Internet Protocol (IP) based wireless
communication network via the antenna, and a storage medium coupled
to the processor, the storage medium having instructions stored
thereon, that if executed by the processor, result in establishing
a communication link with the base station, and sending a message
that includes information for a Power Headroom Report (PHR) and a
value that indicates an uplink transmission power for individual
active component carriers of a carrier aggregation scheme, wherein
the information for the PHR includes a power headroom value that
indicates a difference between the uplink transmission power and an
estimated transmission power for the individual active component
carriers of the carrier aggregation scheme.
[0032] In some embodiments, the apparatus is configured to send the
message during establishment of the communication link.
[0033] In some embodiments, the apparatus of claim 12 is configured
to send to the base station another message that includes updated
information for a Power Headroom Report (PHR) and another value
that indicates an updated uplink transmission power for individual
active component carriers of the carrier aggregation scheme.
[0034] In some embodiments, the apparatus is configured to send to
the base station the another message periodically or based on
occurrence of an event.
[0035] In some embodiments, the value that indicates the uplink
transmission power for individual active component carriers of the
carrier aggregation scheme is a quantized nominal value that is
sent to the base station for the base station to schedule resources
for uplink transmission by the apparatus.
[0036] In some embodiments, the message is a second message that is
sent subsequent to a first message, and the apparatus is further
configured send to the base station the first message to report a
base value of the uplink transmission power for individual active
component carriers of a carrier aggregation scheme, wherein the
first message includes one or more bits to indicate the base value,
the base value being a nominal value of the uplink transmission
power, and wherein the second message includes one or more bits to
differentially indicate an updated value of the uplink transmission
power relative to the base value.
[0037] In some embodiments, the apparatus is further configured to
send the first message during establishment of the communication
link, wherein the first message includes 8 bits to indicate the
base value and is sent independent of messages sent for the PHR,
and the second message includes 4 bits to differentially indicate
the updated value relative to the base value.
[0038] In some embodiments, the apparatus is further configured to,
subsequent to sending the first message, send, by the UE to the
base station, a third message to report another base value of the
uplink transmission power for individual active component carriers
of the carrier aggregation scheme, wherein the another base value
is a nominal value of the uplink transmission power, and wherein
the third message is sent based upon a difference between a
measured uplink transmission power and the reported base value
being greater than a predetermined threshold.
[0039] In some embodiments, the first message, the second message,
and the third message sent by the apparatus each include a Media
Access Control (MAC) layer message.
[0040] In some embodiments, the uplink transmission power is a
maximum transmission power.
[0041] Embodiments of the present disclosure include another method
including establishing, by a base station of an Internet Protocol
(IP) based wireless communication network, a communication link
with a user equipment (UE), receiving, by the base station from the
UE, a message that includes a value that indicates an uplink
maximum transmission power for individual active component carriers
of a carrier aggregation scheme, and scheduling, by the base
station, resources for uplink transmission by the UE based on the
received message.
[0042] In some embodiments, receiving the message is performed
during establishment of the communication link.
[0043] In some embodiments, the another method further includes
receiving, by the base station from the UE, another message that
includes another value that indicates an updated uplink maximum
transmission power for individual active component carriers of a
carrier aggregation scheme.
[0044] In some embodiments, the another message is sent by the UE
to the base station based upon a difference between the another
value and the value being greater than a pre-determined
threshold.
[0045] In some embodiments, the message and the another message
each include a Media Access Control (MAC) layer message that is
received independent of Power Headroom Reporting (PHR) received by
the base station, and the value and the another value each include
a quantized nominal value of the uplink maximum transmission
power.
[0046] Embodiments of the present disclosure further include a
system including a processor configured to communicate with user
equipment (UE) via a base station of an Internet Protocol (IP)
based wireless communication network, and a storage medium coupled
to the processor, the storage medium having instructions stored
thereon, that if executed by the processor, result in establishing,
by the base station, a communication link with the UE, and
receiving, by the base station from the UE, a message that includes
a value that indicates an uplink transmission power for individual
active component carriers of a carrier aggregation scheme.
[0047] In some embodiments, the system is configured to send the
message during establishment of the communication link, and the
system is further configured to schedule, by the base station,
resources for uplink transmission by the UE based on the received
message.
[0048] In some embodiments, the system is further configured to
receive, by the base station from the UE, another message that
includes another value that indicates an updated uplink
transmission power for individual active component carriers of a
carrier aggregation scheme.
[0049] In some embodiments, the another message is sent by the UE
to the base station based upon a difference between the updated
uplink transmission power of the UE and the uplink transmission
power received by the base station in the message being greater
than a pre-determined threshold.
[0050] In some embodiments, the message and the another message
received by the base station each include a Media Access Control
(MAC) layer message that is received independent of Power Headroom
Reporting (PHR) received by the base station, the value and the
another value each include a quantized nominal value of the uplink
transmission power, and the uplink transmission power is a maximum
transmission power. Other embodiments may be described herein.
[0051] FIG. 1 schematically illustrates an example broadband
wireless access (BWA) network 100 in accordance with some
embodiments. The BWA network 100 may be a network having one or
more radio access networks (RANs) 20 and a core network 25.
[0052] User Equipment (UE) 15 may access the core network 25 via a
radio link with a base station (BS) (e.g., one of BSes 40, 42,
etc.) in the RAN 20. The UE 15 may, for example, be a subscriber
station that is configured to concurrently utilize radio resources
across multiple carriers such as in a carrier aggregation scheme
using protocols compatible with the 3GPP standards including, for
example, Long Term Evolution (LTE) including LTE Advanced or
variants thereof. Carrier aggregation may increase channel
bandwidth by combining the capacity of several individual carriers.
The aggregated carriers can be adjacent or nonadjacent and can be
in a single band or in different bands. Each individual carrier may
be referred to as a component carrier (CC). The UE 15 may be
configured to support multiple-input and multiple-output (MIMO)
communication with the BSes 40, 42. For example, multiple antennas
of the UE 15 may be used to concurrently utilize radio resources of
multiple respective component carriers (e.g., carriers of BSes 40,
42) of the BWA network 100. The UE 15 may be configured to
communicate using Orthogonal Frequency Division Multiple Access
(OFDMA) (e.g., downlink) and/or Single-Carrier Frequency Division
Multiple Access (SC-FDMA) (e.g., uplink) in some embodiments. While
FIG. 1 generally depicts the UE 15 as a cellular phone, in various
embodiments the UE 15 may be a personal computer (PC), a notebook,
an ultra mobile PC (UMPC), a handheld mobile device, an universal
integrated circuit card (UICC), a personal digital assistant (PDA),
a Customer Premise Equipment (CPE), or other consumer electronics
such as MP3 players, digital cameras, and the like.
[0053] The BSes 40, 42 may each be configured to provide radio
resources across multiple carriers to the UE 15. According to
various embodiments, the BSes 40, 42 are enhanced Node-B (eNB)
stations. The eNB stations may include multiple antennas, one or
more radio modules to modulate and/or demodulate signals
transmitted or received on an air interface, and one or more
digital modules to process signals transmitted and received on the
air interface.
[0054] In some embodiments, communication with the UE 15 via RAN 20
may be facilitated via one or more nodes 45. The one or more nodes
45 may act as an interface between the core network 25 and the
RAN(s) 20. According to various embodiments, the one or more nodes
45 may include a Mobile Management Entity (MME) that is configured
to manage signaling exchanges (e.g., authentication of the UE 15)
between the BSes 40, 42 and the core network 25 (e.g., one or more
servers 50), a Packet Data Network Gateway (PDN-GW) to provide a
gateway router to the Internet 55, and/or a Serving Gateway (S-GW)
to manage user data tunnels between the BSes 40, 42 of the RAN 20
and the PDN-GW. Other types of nodes may be used in other
embodiments.
[0055] The core network 25 may include logic (e.g., a module) to
provide authentication of the UE 15 or other actions associated
with establishment of a communication link to provide a connected
state of the UE 15 with the BWA network 100. For example, the core
network 25 may include one or more servers 50 that may be
communicatively coupled to the BSes 40, 42. In an embodiment, the
one or more servers 50 include a Home Subscriber Server (HSS),
which may be used to manage user parameters such as a user's
International Mobile Subscriber Identity (IMSI), authentication
information, and the like. The one or more servers 50 may include
over-the-air (OTA) servers in some embodiments. In some
embodiments, logic associated with different functionalities of the
one or more servers 50 may be combined to reduce a number of
servers, including, for example, being combined in a single machine
or module.
[0056] According to various embodiments, the BWA network 100 is an
Internet Protocol (IP) based network. For example, the core network
25 may be an IP based network. Interfaces between network nodes
(e.g., the one or more nodes 45) may be based on IP, including a
backhaul connection to the BSes 40, 42.
[0057] FIG. 2 schematically illustrates an example reporting scheme
200 for uplink maximum transmission power P.sub.CMAX, c in
accordance with some embodiments. At 202, the UE 15 may send a
message to report P.sub.CMAX, c to a base station 40. The message
may include a value that indicates the uplink maximum transmission
power for each active component carrier (e.g., P.sub.CMAX, c) of a
carrier aggregation scheme. The message can be sent over any active
component carrier between the UE 15 and the base station 40. For
example, the P.sub.CMAX, c for a first component carrier (CC1) and
a second component carrier (CC2) can be sent over CC1 or CC2. In
some embodiments, the message is a Media Access Control (MAC) layer
message. The message may be sent independent (e.g., in isolation)
of other messages sent by the UE 15. In an embodiment, the message
is sent independent of one or more messages to report power
headroom in a Power Headroom Report (PHR). For 3GPP embodiments,
the message may be sent by the UE 15 over a Physical Uplink Shared
Channel (PUSCH).
[0058] The message sent at 202 may include a quantized nominal
value of P.sub.CMAX, c for each active component carrier. The
quantized nominal value may include, for example, one or more bits
that indicate the actual maximum uplink transmission power
P.sub.CMAX, c (e.g., 23 dBm) for each active component carrier.
[0059] According to various embodiments, the message sent at 202
may be a first message sent to report P.sub.CMAX, c during
establishment of a communication link, at 201, between the UE 15
and the base station 40. In some embodiments, the communication
link is established between the UE 15 and the base station 40 when
the UE 15 receives an IP address for use in communication with the
wireless network (e.g., the BWA network 100 of FIG. 1). The message
at 202 may be sent based on an event or message associated with
establishment of the communication link between the UE 15 and the
wireless network which the base station 40 services.
[0060] The UE 15 may determine whether a reporting condition has
occurred at 250. For example, the UE 15 may calculate or otherwise
determine a current P.sub.CMAX, c on a periodic or event-driven
basis and compare the current P.sub.CMAX, c with a reported
P.sub.CMAX, c (e.g., the last reported P.sub.CMAX, c at 202). When
a difference between the current P.sub.CMAX, c and the reported
P.sub.CMAX, c is greater than a predetermined threshold, another
message is sent to report the current P.sub.CMAX, c. This same
technique can be used to send another message at 206 to report an
updated P.sub.CMAX, c and can be repeated, for example, until the
UE 15 is disconnected from the wireless network. The base station
40 may schedule or otherwise allocate resources for uplink
transmission by the UE 15 based on the messages received at, e.g.,
202, 204, and 206 to report the P.sub.CMAX, c.
[0061] In the reporting scheme 200, the P.sub.CMAX, c may only be
reported when a change to the P.sub.CMAX, c has occurred. Such
reporting scheme 200 may provide reduced bandwidth usage compared
to other reporting schemes where P.sub.CMAX, c is reported even
when a threshold change to the P.sub.CMAX, c has not occurred.
[0062] FIG. 3 schematically illustrates another example reporting
scheme 300 for uplink maximum transmission power P.sub.CMAX, c in
accordance with some embodiments. In the reporting scheme 300,
messages sent at 302, 304, and 306 include information for a Power
Headroom Report (PHR) and the P.sub.CMAX, c for each active
component of the carrier aggregation scheme. The information for
the PHR may include, for example, a power headroom value that
indicates a difference between the P.sub.CMAX, c and an estimated
transmission power for each active component carrier of the carrier
aggregation scheme.
[0063] According to various embodiments, the UE 15 may be
configured to send a PHR message to the base station 40 during
establishment of a communication link with the wireless network
(e.g., the BWA network 100 of FIG. 1) at 301. The UE 15 may be
configured to send additional PHR messages at 304 and 306 based on
occurrence of a reporting condition. For example, the UE 15 may
determine whether a reporting condition (e.g., timer, event, etc.)
for PHR has occurred at 350. If the reporting condition has
occurred, then the UE sends the PHR message to the base station 40
at 304. Sending of the PHR messages (e.g., at 304, 306, and so
forth) may be controlled by a PHR control module disposed in the UE
15. The messages may be sent periodically or based on the
occurrence of an event, or combinations thereof.
[0064] In the reporting scheme 300, the P.sub.CMAX, c may be sent
with each PHR message sent by the UE 15 to the base station 40.
According to various embodiments, the messages sent at 302, 304,
and 306 may include a quantized nominal value of P.sub.CMAX, c for
each active component carrier. In some embodiments, the messages
sent at 302, 304, and 306 are MAC layer messages.
[0065] FIG. 4 schematically illustrates yet another example
reporting scheme 400 for uplink maximum transmission power
P.sub.CMAX, c in accordance with some embodiments. At 402, the UE
15 sends a message to report a base value of P.sub.CMAX, c to the
base station 40. In some embodiments, the message is sent at 402
during establishment of a communication link, at 401, between the
UE 15 and the base station 40. The base value may include a
quantized nominal value of P.sub.CMAX, c.
[0066] At 403, the UE 15 determines whether a reporting condition
for reporting the base value has occurred. When the UE 15 has
determined that the reporting condition for reporting of the base
value has occurred, the UE 15 sends another message at 408 to
report an updated base value P.sub.CMAX, c, which may include
another quantized nominal value of P.sub.CMAX, c. The determining
at 403 may be performed until it has been determined that the
reporting condition for reporting the base value has occurred
(e.g., `yes` corresponding with the arrow from determining at 403
in FIG. 4), whereupon the message is sent at 408. In the depicted
example flow in FIG. 4, the reporting condition for reporting of
the base value is determined to have occurred subsequent to
messages sent at 404 and 406, however the reporting condition for
reporting of the base value may be determined to have occurred at
different times including earlier and later times than what is
depicted in other embodiments.
[0067] At 405, the UE 15 determines whether a reporting condition
for PHR has occurred. Upon determining that the reporting condition
for PHR has occurred, the UE 15 sends a message, at 404, to report
a differential value of P.sub.CMAX, c together with PHR
information. The message sent at 404 may include a quantized
differential value of P.sub.CMAX, c for each active component
carrier. The quantized differential value may include, for example,
one or more bits that indicate an updated maximum uplink
transmission power P.sub.CMAX, c relative to the reported base
value of P.sub.CMAX, c for each active component carrier. For
example, if the base value of P.sub.CMAX, c reported at 402 is 21
dBm, then the differential value can include one or more bits to
indicate an updated P.sub.CMAX, c relative to the reported base
value (e.g., the one or more bits can indicate a change of .+-.1,
.+-.2, .+-.3 dBm, or other difference from the reported base value
of +21 dBm). According to various embodiments, the messages sent to
report a base value of P.sub.CMAX, c (e.g., messages sent at 402 or
408) include eight bits to indicate the nominal value of
P.sub.CMAX, c and the messages sent to report a differential value
of P.sub.CMAX, c (e.g., messages sent at 404 or 406) include four
bits to indicate the difference from the reported value. Other
numbers of bits can be used to report the base and differential
values in other embodiments.
[0068] The UE 15 may send another message at 406 to report another
differential value for P.sub.CMAX, c and PHR information upon again
determining that a reporting condition for PHR has occurred at 405.
According to various embodiments, the UE 15 may continue to report
the differential value for P.sub.CMAX, c with each PHR message sent
to report PHR information (e.g., each time the UE 15 determines
that a reporting condition for PHR has occurred).
[0069] Although in the depicted example embodiment, the message at
408 is sent subsequent to sending a message at 404 and 406 to
report a differential value of P.sub.CMAX, c in other embodiments,
the message sent at 408 to update the base value P.sub.CMAX, c can
be sent in cases where other numbers of messages or even no
messages to report a differential value for P.sub.CMAX, c (e.g.,
messages sent at 404 and 406) are sent. The flow shown in reporting
scheme 400 is merely one example of a possible flow in accordance
with embodiments herein.
[0070] In reporting scheme 400, some aspects of reporting scheme
300 and reporting scheme 200 may be combined. For example, the
messages sent, e.g., at 402 and 408, to report the base value
P.sub.CMAX, c may comport with embodiments described for messages
sent at 202, 204, and/or 206 in FIG. 2. The messages sent, e.g., at
404 and 406, to report the differential value P.sub.CMAX, c and PHR
information may comport with embodiments described for messages
sent at 302, 304, and/or 306 in FIG. 3. The determination of
whether a reporting condition for reporting base value has
occurred, at 403, may comport with the determination of whether a
reporting condition has occurred at 250 of FIG. 2. The
determination of whether a reporting condition for PHR has
occurred, at 405, may comport with the determination of whether a
reporting condition for PHR has occurred at 350 of FIG. 3. The
reporting scheme 400 may facilitate reporting of P.sub.CMAX, c with
each PHR message similar to reporting scheme 300, but using less
bandwidth than the reporting scheme 300 by using a differential
value to report the P.sub.CMAX, c instead of a nominal value.
[0071] The determining by the UE 15 at 403 and 405 may be
continuously or periodically performed while the UE 15 is in a
connected state with the base station 40. Whenever the respective
reporting condition has occurred for said determining, a respective
message to report a base and differential value of P.sub.CMAX, c
may be sent. The techniques described in connection with reporting
schemes 200, 300, and 400 may be combined in various
embodiments.
[0072] FIG. 5 is a flow diagram of a method 500 for reporting
uplink maximum transmission power P.sub.CMAX, c in accordance with
some embodiments. At 502, the method 500 includes establishing a
communication link with a base station (e.g., the base station 40
of FIGS. 2 and 3) of an Internet Protocol (IP) based wireless
communication network (e.g., the BWA network 100 of FIG. 1). For
example, a UE (e.g., UE 15 of FIGS. 2 and 3) may exchange
authentication information with and receive an IP address from the
IP based wireless communication network for communication within
the network. The UE may be in a connected state after receiving the
IP address.
[0073] At 504, the method 500 further includes sending a message
that includes a value that indicates an uplink maximum transmission
power P.sub.CMAX, c for each active component of a carrier
aggregation scheme. In some embodiments, the message may comport
with embodiments described for the message sent at 202 or at
204/206 in FIG. 2. In other embodiments, the message may comport
with embodiments described for the message sent at 302 or at
304/306 in FIG. 3.
[0074] At 506, the method 500 further includes determining whether
a reporting condition has occurred. In some embodiments, the
determining may comport with embodiments described in connection
with determining whether a reporting condition has occurred at 250
of FIG. 2. In other embodiments, the determining may comport with
embodiments described in connection with determining whether a
reporting condition for PHR has occurred at 350 of FIG. 3.
[0075] At 508, the method 500 further includes sending another
message that includes another value that indicates an uplink
maximum transmission power P.sub.CMAX, c for each active component
of a carrier aggregation scheme. In some embodiments, sending
another message at 508 comports with embodiments described in
connection with sending a message at 204 or 206 in FIG. 2. In other
embodiments, sending another message at 508 comports with
embodiments described in connection with sending a message at 304
or 306 in FIG. 3.
[0076] FIG. 6 is a flow diagram of another method 600 for reporting
uplink maximum transmission power P.sub.CMAX, c in accordance with
some embodiments. At 602, the method 600 includes establishing a
communication link with a base station of an IP-based wireless
communication network. The communication link may be established,
for example, according to embodiments described for establishing a
communication link at 502 in FIG. 5.
[0077] At 604, the method 600 further includes sending a message to
report a base value of an uplink maximum transmission power
P.sub.CMAX, c for each active component of a carrier aggregation
scheme. According to various embodiments, sending the message at
604 comports with embodiments described, e.g., in connection with
sending the message at 402 or 408 of FIG. 4.
[0078] At 606, the method 600 further includes determining whether
a reporting condition for reporting a base value has occurred. The
determining at 606 may comport with embodiments described in
connection with determining at 403 of FIG. 4.
[0079] At 608, when it is determined that a reporting condition has
occurred at 606, the method 600 further includes sending a message
to report another base value of P.sub.CMAX, c for each active
component of a carrier aggregation scheme. Sending a message at 608
may comport with embodiments described in connection with sending a
message at 408 of FIG. 4. The actions at 606 and 608 may be
repeated until the UE is disconnected from the network.
[0080] At 610, the method 600 further includes determining whether
a reporting condition for PHR has occurred. The determining at 610
may comport with embodiments described in connection with
determining at 405 of FIG. 4. The determining at 606 and 610 may
occur simultaneously or in any suitable order.
[0081] At 612, when it is determined that a reporting condition for
PHR has occurred, the method 600 further includes sending a message
to report a PHR value and a differential value of P.sub.CMAX, c
relative to a reported base value for each active component of a
carrier aggregation scheme. The PHR value may include, for example,
a power headroom value that indicates a difference between the
P.sub.CMAX, c and an estimated transmission power for each active
component carrier of the carrier aggregation scheme. The
differential value may indicate an updated P.sub.CMAX, c value
relative to a most recently reported base value of P.sub.CMAX, c.
The actions at 610 and 612 may be repeated until the UE is
disconnected from the network. The actions of methods 500 and 600
may be performed by the UE.
[0082] FIG. 7 is a flow diagram of a method for scheduling
resources for uplink transmission in accordance with some
embodiments. The actions of method 700 may be performed, for
example, by a base station (e.g., the base station 40 of FIG. 1) of
an IP based wireless communication network (e.g., the BWA network
100 of FIG. 1).
[0083] At 702, the method 700 includes establishing a communication
link with user equipment (UE) (e.g., UE 15 of FIG. 1) of an
Internet Protocol (IP) based wireless communication network. In
establishing the communication link, the base station may, for
example, exchange authentication information with the UE and send
an IP address to the UE for use by the UE in communication with the
network.
[0084] At 704, the method 700 further includes receiving a message
that includes a value that indicates an uplink maximum transmission
power P.sub.CMAX, c for each active component carrier of a carrier
aggregation scheme. In some embodiments, the message received at
704 may correspond with the message sent at 504 in method 500 of
FIG. 5. In other embodiments, the message received at 704 may
correspond with the message sent at 604, 608, or 612 in method 600
of FIG. 6.
[0085] At 706, the method 700 further includes scheduling resources
for uplink transmission by the UE based on the received message.
For example, the resources may be scheduled based on the reported
uplink maximum transmission power P.sub.CMAX, c for each active
component carrier of a carrier aggregation scheme. The scheduled
resources may include radio resources such as uplink component
carriers for communication with the UE. Actions at 704 and 706 may
be repeated until the UE has been disconnected from the
network.
[0086] Embodiments of the present disclosure may be implemented
into a system using any suitable hardware and/or software to
configure as desired. FIG. 8 schematically illustrates an example
system 800 that may be used to practice various embodiments
described herein. FIG. 8 illustrates, for one embodiment, an
example system 800 having one or more processor(s) 804, system
control module 808 coupled to at least one of the processor(s) 804,
system memory 812 coupled to system control module 808,
non-volatile memory (NVM)/storage 816 coupled to system control
module 808, and one or more communications interface(s) 820 coupled
to system control module 808.
[0087] In some embodiments, the system 800 may be capable of
functioning as the UE 15 as described herein. In other embodiments,
the system 800 may be capable of functioning as the one or more
servers 50 of FIG. 1 or otherwise provide logic/module that
performs functions as described for the base station herein.
[0088] System control module 808 for one embodiment may include any
suitable interface controllers to provide for any suitable
interface to at least one of the processor(s) 804 and/or to any
suitable device or component in communication with system control
module 808.
[0089] System control module 808 may include memory controller
module 810 to provide an interface to system memory 812. The memory
controller module 810 may be a hardware module, a software module,
and/or a firmware module.
[0090] System memory 812 may be used to load and store data and/or
instructions, for example, for system 800. System memory 812 for
one embodiment may include any suitable volatile memory, such as
suitable DRAM, for example. In some embodiments, the system memory
812 may include double data rate type four synchronous dynamic
random-access memory (DDR4 SDRAM).
[0091] System control module 808 for one embodiment may include one
or more input/output (I/O) controller(s) to provide an interface to
NVM/storage 816 and communications interface(s) 820.
[0092] The NVM/storage 816 may be used to store data and/or
instructions, for example. NVM/storage 816 may include any suitable
non-volatile memory, such as flash memory, for example, and/or may
include any suitable non-volatile storage device(s), such as one or
more hard disk drive(s) (HDD(s)), one or more compact disc (CD)
drive(s), and/or one or more digital versatile disc (DVD) drive(s),
for example.
[0093] The NVM/storage 816 may include a storage resource
physically part of a device on which the system 800 is installed or
it may be accessible by, but not necessarily a part of, the device.
For example, the NVM/storage 816 may be accessed over a network via
the communications interface(s) 820.
[0094] Communications interface(s) 820 may provide an interface for
system 800 to communicate over one or more network(s) and/or with
any other suitable device. In some embodiments, the communications
interface(s) 820 may include a wireless network interface
controller (WNIC) 824 having one or more antennae 828 to establish
and maintain a wireless communication link with one or more
components of a wireless network. The system 800 may wirelessly
communicate with the one or more components of the wireless network
in accordance with any of one or more wireless network standards
and/or protocols.
[0095] For one embodiment, at least one of the processor(s) 804 may
be packaged together with logic for one or more controller(s) of
system control module 808, e.g., memory controller module 810. For
one embodiment, at least one of the processor(s) 804 may be
packaged together with logic for one or more controllers of system
control module 808 to form a System in Package (SiP). For one
embodiment, at least one of the processor(s) 804 may be integrated
on the same die with logic for one or more controller(s) of system
control module 808. For one embodiment, at least one of the
processor(s) 804 may be integrated on the same die with logic for
one or more controller(s) of system control module 808 to form a
System on Chip (SoC).
[0096] In various embodiments, the system 800 may be, but is not
limited to, a server, a workstation, a desktop computing device, or
a mobile computing device (e.g., a laptop computing device, a
handheld computing device, a tablet, a netbook, etc.). In various
embodiments, the system 800 may have more or less components,
and/or different architectures.
[0097] Although certain embodiments have been illustrated and
described herein for purposes of description, a wide variety of
alternate and/or equivalent embodiments or implementations
calculated to achieve the same purposes may be substituted for the
embodiments shown and described without departing from the scope of
the present disclosure. This application is intended to cover any
adaptations or variations of the embodiments discussed herein.
Therefore, it is manifestly intended that embodiments described
herein be limited only by the claims and the equivalents
thereof.
* * * * *