U.S. patent application number 14/778511 was filed with the patent office on 2016-10-06 for signaling interference information for user equipment assistance.
The applicant listed for this patent is INTEL IP CORPORATION. Invention is credited to Cecilia Carbonelli, Stefan Fechtel, Stefan Franz, Sabine Roessel.
Application Number | 20160295597 14/778511 |
Document ID | / |
Family ID | 52390459 |
Filed Date | 2016-10-06 |
United States Patent
Application |
20160295597 |
Kind Code |
A1 |
Franz; Stefan ; et
al. |
October 6, 2016 |
SIGNALING INTERFERENCE INFORMATION FOR USER EQUIPMENT
ASSISTANCE
Abstract
Embodiments for providing signaling interference signaling
information for UE assistance are generally described herein. In
some embodiments, signaling information associated with interfering
cells from a network node is received by user equipment (UE). The
UE adjusts parameter estimation for mitigating interference based
on the received signaling information.
Inventors: |
Franz; Stefan; (Munich,
DE) ; Carbonelli; Cecilia; (Munich, DE) ;
Roessel; Sabine; (Munich, DE) ; Fechtel; Stefan;
(Zorneding, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
INTEL IP CORPORATION |
Santa Clara |
CA |
US |
|
|
Family ID: |
52390459 |
Appl. No.: |
14/778511 |
Filed: |
March 28, 2014 |
PCT Filed: |
March 28, 2014 |
PCT NO: |
PCT/US2014/032190 |
371 Date: |
September 18, 2015 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
61859121 |
Jul 26, 2013 |
|
|
|
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H04W 72/042 20130101;
H04W 36/0072 20130101; H04W 24/02 20130101; H04B 7/0632 20130101;
H04W 72/0413 20130101; H04W 76/27 20180201; H01Q 1/243 20130101;
H01Q 3/00 20130101; H04W 72/0446 20130101; H04L 5/0007 20130101;
H04W 16/28 20130101; H04W 72/082 20130101; H04W 88/08 20130101;
Y02D 30/70 20200801; H04J 11/0023 20130101; H04W 74/0833 20130101;
H04W 76/14 20180201; H04L 5/0094 20130101; H04L 69/16 20130101;
H04W 84/12 20130101; H04W 88/06 20130101; H04W 36/0083 20130101;
H04W 24/08 20130101; H04W 28/12 20130101; H04W 76/10 20180201; H04B
7/0695 20130101; H04L 5/14 20130101; H04W 4/70 20180201; H04W 24/10
20130101; H04W 36/30 20130101; H04W 36/0066 20130101; H04B 7/0686
20130101; H04W 52/0209 20130101; H04W 84/045 20130101; H04W 84/18
20130101; H04B 17/318 20150115; H04W 76/11 20180201 |
International
Class: |
H04W 72/08 20060101
H04W072/08; H04W 24/10 20060101 H04W024/10; H04W 24/02 20060101
H04W024/02; H04W 76/04 20060101 H04W076/04; H04W 72/04 20060101
H04W072/04 |
Claims
1. A method for signaling interference signaling information for UE
assistance, comprising: receiving, by a user equipment (UE),
signaling information associated with interfering cells from a
network node; and adjusting, by the UE, parameter estimation for
mitigating interference based on the received signaling
information.
2. The method of claim 1, wherein the receiving the signaling
information includes receiving information regarding variations of
interfering cells across time and frequency.
3-14. (canceled)
15. A user equipment (UE), comprising: a transceiver arranged to
receive signaling information associated with interfering cells
from a network node; and wherein the transceiver is further
arranged to adjust parameter estimation for mitigating interference
based on the received signaling information to receive information
regarding variations of interfering cells across time and
frequency.
16. The user equipment of claim 15, wherein the transceiver is
further arranged to receive an indication to the UE via signaling N
bits of assistance information per transmission time interval (TTI)
via a physical dedicated assistance channel (PDACH) and an
indication of a position of PDACH channel via radio resource
control (RRC) signaling.
17. The user equipment of claim 15, wherein the transceiver is
further arranged to receive at least one type of information
selected from the group consisting of an indication to the UE via
signaling N bits of assistance information per transmission time
interval (TTI) via a physical dedicated assistance channel (PDACH)
including signaling information of a single interfering cell for
log 2(N) resource allocation block, an indication of a position of
PDACH channel via radio resource control (RRC) signaling, an
indication of a frequency hopping pattern over 10 subframes within
a TTI and a frequency hopping pattern over multiple TTIs.
18. The user equipment of claim 15, wherein transceiver is further
arranged to receive a number of bits per transmission time interval
(TTI) and per interfering cell describing the scheduling of the
interfering cells.
19. The user equipment of claim 15, wherein the transceiver is
further arranged to receive signaling information including
signaling information regarding one 20 MHz interfering cell
including at least 28 bits per TTI.
20. The user equipment of claim 15, wherein the transceiver is
further arranged to receive additional signaling information for
only resource blocks determined to be affected by interference.
21. The user equipment of claim 15, wherein the transceiver is
further arranged to receive signaling information over a physical
dedicated assistance channel (PDACH) from a serving cell to the
UE.
22. The user equipment of claim 15, wherein the transceiver is
further arranged to identify form the received signaling
information a location and size of a physical dedicated assistance
channel (PDACH) via radio resource control signaling.
23. The user equipment of claim 15, wherein the transceiver is
further arranged to receive signaling information over an
assistance broadcast channel (ABCH) used for a plurality of
UEs.
24. The user equipment of claim 15, wherein the transceiver is
further arranged to receive signaling information using a component
carrier reserved solely for transmission of assistance
information.
25. The user equipment of claim 15, wherein the transceiver is
further arranged to receive signaling information using at least
one type of signaling selected from multi-cast transmission
information and DCI signaling in a physical downlink control
channel, the receiving signaling information signaling at least one
of slowly changing assistance information and how to interpret the
assistance information.
26. The user equipment of claim 15, wherein the transceiver is
further arranged to receive coordinated signaling information
including an accumulated resource allocation over a plurality of
interfering cells.
27. The user equipment of claim 15, wherein the transceiver is
further arranged to receive coordinated signaling information
including only a subset of resource blocks of the UE to allow
staggering of interference signaling information over multiple TTIs
using a predetermined periodicity.
28. At least one non-transitory machine readable medium comprising
instructions that, when executed by the machine, cause the machine
to perform operations for signaling interference signaling
information for user equipment assistance, the operations
comprising: receiving, by a user equipment (UE), signaling
information associated with interfering cells from a network node;
and adjusting, by the UE, parameter estimation for mitigating
interference based on the signaling information received by the
UE.
29. The at least one non-transitory machine readable medium of
claim 28, wherein the receiving the signaling information includes
receiving information regarding variations of interfering cells
across time and frequency.
30. The at least one non-transitory machine readable medium of
claim 28, wherein receiving, by a user equipment (UE), signaling
information associated with interfering cells from a network node
comprises at least one type of information selected from the group
consisting of an indication to the UE via signaling N bits of
assistance information per transmission time interval (TTI) via a
physical dedicated assistance channel (PDACH) including signaling
information of a single interfering cell for log 2(N) resource
allocation block, an indication of a position of PDACH channel via
radio resource control (RRC) signaling, an indication of a
frequency hopping pattern over 10 subframes within a TTI and a
frequency hopping pattern over multiple TTIs.
31. The at least one non-transitory machine readable medium of
claim 28, wherein the receiving signaling information comprises
receiving a number of bits per transmission time interval (TTI) and
per interfering cell describing the scheduling of the interfering
cells.
32. The at least one non-transitory machine readable medium of
claim 28, where the operations further comprise: receiving an
indication at the UE of a location and size of a physical dedicated
assistance channel (PDACH) via radio resource control
signaling.
33. The at least one non-transitory machine readable medium of
claim 28, wherein the receiving signaling information comprises
receiving signaling information over an assistance broadcast
channel (ABCH) used for a plurality of UEs.
34. The at least one non-transitory machine readable medium of
claim 28, wherein the receiving signaling information comprises
receiving signaling information using at least one type of
signaling selected from multi-cast transmission information and DCI
signaling in a physical downlink control channel, the receiving
signaling information signaling at least one of slowly changing
assistance information and how to interpret the assistance
information.
Description
CLAIM OF PRIORITY
[0001] This application claims the benefit of priority to U.S.
Provisional Patent Application Ser. No. 61/859,121, filed on Jul.
26, 2013, which is incorporated herein by reference in its
entirety.
BACKGROUND
[0002] In heterogeneous networks where small cells are placed
within homogeneous macro coverage, user equipment (UE) will
experience significantly higher interference levels compared to a
homogeneous macro network scenario. The number of unknown
parameters associated with the interfering transmissions makes
accurate interference cancellation/suppression challenging and
often inaccurate. In addition, interference
cancellation/suppression may present a challenge in homogeneous
macro networks where UEs are located close to the cell edge.
[0003] To help the UE in mitigating the interference, a network
assisted interfere cancellation (NAICS) study was introduced in
Third Generation Partnership Project (3GPP) standardization. NAICS
aims at improving inter-cell interference mitigation by providing
knowledge about interfering transmissions with possible network
coordination to the victim UE. The potential gains of advanced UE
receivers with network assistance were identified as part of the
study. By increasing the degree of knowledge about interfering
transmissions with possible coordination in the network,
enhancements to intra-cell and inter-cell interference mitigation
at the receiver side may be achieved.
[0004] A conventional receiver, which does not receive signaling
information about interfering cells, uses the information
transmitted on the control and broadcast channels (PBCH) and other
parameters provided by the searcher, and higher layers to obtain a
preliminary interference classification. Unfortunately, this
information is often not sufficient to correctly assist the
receiver in generating accurate estimates of the physical layer
parameters. As a consequence, the conventional receiver is designed
in a conservative way and for the worst case scenario thus
compromising performance in many configurations.
BRIEF DESCRIPTION OF THE DRAWINGS
[0005] FIG. 1 illustrates a homogeneous macro network scenario
according to an embodiment;
[0006] FIG. 2 illustrates a first heterogeneous network according
to an embodiment;
[0007] FIG. 3 illustrates a second heterogeneous network according
to an embodiment;
[0008] FIG. 4 is a plot comparing interferer signaling information
assistance for a conventional receiver and a receiver using
network-provided signaling information on interfering cells
according to an embodiment;
[0009] FIG. 5 illustrates interference scheduling of single cell
via Physical Dedicated Assistance Channel (PDACH) according to an
embodiment;
[0010] FIG. 6 illustrates interference scheduling of two cells via
a Physical Dedicated Assistance Channel (PDACH) according to an
embodiment;
[0011] FIG. 7 is a flowchart of a method for signaling interference
signaling information for UE assistance according to an embodiment;
and
[0012] FIG. 8 illustrates a block diagram of an example machine for
signaling interference signaling information for UE assistance
according to an embodiment.
DETAILED DESCRIPTION
[0013] The following description and the drawings sufficiently
illustrate specific embodiments to enable those skilled in the art
to practice them. Other embodiments may incorporate structural,
logical, electrical, process, and other changes. Portions and
features of some embodiments may be included in, or substituted
for, those of other embodiments. Embodiments set forth in the
claims encompass available equivalents of those claims.
[0014] According to an embodiment, a user equipment (UE) is
provided assistance using signaling information of the main
interfering cells to allow the UE to improve its parameter
estimates upon the conventional receiver approach. Assistance
information provided by the network includes signaling information
of the interferers and their variations across time and frequency.
The signaling information allows the UE to improve parameter
estimation by reducing the number of unknowns that need to be
estimated by the UE. The interpretation of the signaling
information provided by the network may depend on radio resource
control (RRC) signaling or multi-cast transmissions information or
the downlink control information (DCI) information in the physical
downlink control channel/enhanced physical downlink control channel
(PDCCH/ePDCCH) transmitted to the UE. This allows different network
vendors to tailor and/or adapt their signaling scheme.
[0015] FIG. 1 illustrates a homogeneous macro network scenario 100
according to an embodiment. In FIG. 1, a single base station,
eNodeB, or other network node 110 provides coverage for three cells
120, 122, 124. In FIG. 1, the homogenous macro network 100 may
provide intra-site information exchange. However, inter-site
information exchange is subject to the backhaul latency.
[0016] FIG. 2 illustrates a first heterogeneous network 200
according to an embodiment. In FIG. 2, three base stations,
eNodeBs, or other network nodes 210, 212, 214 provide service
coverage for three cells 220, 222, 224. Small cells 230, 232, 234,
240, 242, 244, 250, 252, 254 are shown disposed within cells 220,
222, 224, respectively. However, in FIG. 2, small cell deployment
for small cells 230, 232, 234, 240, 242, 244, 250, 252, 254 is
sparse rather than clustered. Backhaul may be between macro-cells,
e.g., 220, 222, 224, and small cells, e.g., small cells 230, 232,
234, 240, 242, 244, 250, 252, 254, within its respective coverage.
Backhaul may also be between macros of different sites, e.g.,
between cell 220 and cell 222. Regarding coordination, intra-site
information exchange is possible. However, inter-site information
exchange is subject to the backhaul latency.
[0017] FIG. 3 illustrates a second heterogeneous network 300
according to an embodiment. In FIG. 3, three base stations,
eNodeBs, or other network nodes 310, 312, 314 provide service
coverage for three cells 320, 322, 324. Small cells 330, 332, 334,
340, 342, 344, 350, 352, 354 are shown disposed within cells 320,
322, 324, respectively. However, in FIG. 3, fiber access is
provided between network nodes 310, 312, 314 and the small cells
330, 332, 334, 340, 342, 344, 350, 352, 354.
[0018] In FIG. 3, backhaul may be provided between macro nodes 310,
312, 314 and small nodes within the network's coverage, and between
small nodes under the coverage of one macro, e.g., one of network
nodes 310, 312, 314. According to the backhaul assumptions,
information exchange is possible for intra-site scenarios, between
a macro and a small node within the network's coverage, and among
small nodes within the coverage of the same macro, e.g., one of
network nodes 310, 312, 314. Information exchange is subject to the
backhaul latency for inter-site exchange between macro nodes 310,
312, 314, between a macro node, e.g., one of network nodes 310,
312, 314, and a small node, e.g., one of small cells 330, 332, 334,
340, 342, 344, 350, 352, 354, outside its coverage and among small
nodes 330, 332, 334, 340, 342, 344, 350, 352, 354 within the
coverage of different macro nodes 310, 312, 314.
[0019] FIG. 4 is a plot 400 comparing interferer signaling
information assistance for a conventional receiver and a receiver
using network-provided scheduling of interfering cells according to
an embodiment. FIG. 4 shows the throughput 410 versus SINR
measurements 420 for signaling interference signaling information
for UE assistance. One receiver 430 benefits from assistance
information related to the scheduling of interfering cells provided
by the network. The other receiver 440 is a conventional receiver
(state-of-the-art) that is designed for the worst case interference
configuration and has no access to assistance information. As can
be seen, the receiver 430 receiving interferer signaling
information may provide performance improvements in the order of
1-2 dB compared to a conventional receiver 440. In FIG. 4, the
serving cell and the aggressor cell occupy the same bandwidth, but
the aggressor is scheduled using a subset of resource blocks.
[0020] Referring to FIG. 3, for example, a base station 310 may
send to one UE 360, to some UEs 362, or to all served UEs 364 a
certain number of bits 370 per transmission time interval (TTI) and
per interfering cell describing the scheduling of the interfering
cells. The number of bits 370 may be variable, depending on
signaling or multi-cast transmission information, or DCI signaling
in PDCCH/ePDCCH. Current networks do not provide signaling
information about interfering cells to, for example, UE 360. By
providing signaling information about interfering cells to the UE
360, the UE 360 may adjust parameter estimation to mitigate
interference based on the received signaling information signaling
information. The signaling information providing in the bits may
include information regarding variations of interfering cells
across time and frequency.
[0021] It is assumed that the network 300 coordinates fast and that
the information about the scheduling of the interfering cells is
available in time at the primary serving cell 320, e.g., the cell
which serves the UE 360. Furthermore, it is assumed that the
network is synchronized with TTI accuracy. As the scheduling of
interferers could potentially change each TTI, a TTI mismatch would
limit the value of the interferer signaling information for the
receiver of the UE 360.
[0022] To signal the accurate signaling information of one
interfering cell's LTE component carrier (20 MHz bandwidth, 110
resource blocks (RBs)), N=28 bits per TTI may be used. However,
this may represent an upper limit. The 28 bits may reflect the need
for Physical Downlink Shared Channel (PDSCH) Resource Allocation
Types 0 and 1, while fewer bits may be used for the PDSCH Resource
Allocation Type 2. The PDSCH is the main data bearing channel which
is allocated to users on a dynamic and opportunistic basis. The
PDSCH carries data in what's known as Transport Blocks (TB) which
correspond to a MAC PDU. They are passed from the MAC layer to the
PHY layer once per TTI, which is 1 millisecond (ms) in duration,
i.e., the scheduling interval is 1 ms in order to meet low latency
goals.
[0023] Furthermore, in most scenarios where a certain level of
coordination has been already achieved within the network, only a
subset of resource blocks will be affected by interference and
fewer signaling bits might be used. Also, in the presence of more
interferers, the scheduling bits could indicate the resource
allocation of the superposition of all or of a subset of the
relevant interfering cells (typically, limited to a few resource
blocks). In another embodiment, the network could provide the
interferer signaling information incrementally. The method of
providing initial and delta assistance information could be
signaled upfront.
[0024] Depending on the type of traffic, the scheduling of the
interferer(s) may remain unchanged for some time. Then signaling
may not be required until the allocation changes again. This opens
the possibility to save control overhead by having the eNB transfer
differential allocation information, i.e., the boundaries of the
(time-frequency) regions where interferers are "switched" on or
off.
[0025] FIG. 5 shows the interference scheduling 500 of a cell via a
Physical Dedicated Assistance Channel (PDACH) according to an
embodiment. In FIG. 5, frames 510 are shown across time 512.
Signaling 520 is provided by the network, which indicates to the UE
that the N bit assistance information per TTI via the PDACH channel
530 provides signaling information of an interfering cell for log 2
(N) resource allocation blocks, e.g., where the UE is scheduled. An
RRC delay of t TTI 540 occurs prior to the signaling taking effect
550 in the PDACH 530.
[0026] In general, the way the network signals the signaling
information to the UE may be provided using a plurality of
techniques. For example, a new assistance channel, the Physical
Dedicated Assistance Channel (PDACH) 530, may be used to transmit
assistance information to the UE as shown in FIG. 5. The PDACH 530
is used by the serving cell to transmit assistance information
related to interference cancellation (NAICS) to the UE. Similar to
the enhanced physical downlink control channel (ePDCCH) channel,
this channel may reside in the data region of the subframe. For
example the ePDCCH is currently used to support increased downlink
control channel capacity, beamforming and improved spatial reuse,
and frequency-domain intercell interference coordination, while
taking into account the coexistence with legacy terminals. The
PDACH 530 uses the data regions to provide the signaling
information signaling information.
[0027] The position of the Physical Dedicated Assistance Channel
(PDACH) 530, i.e., subcarrier(s), starting OFDM symbol, ending OFDM
symbol, is also signaled by the network (RRC) signaling 520. In
FIG. 5, subframe 0 560 to subframe 9 562 are illustrated in more
detail. The signaling in a frame 564 may include N=10 bits per TTI
for indicating interference on the log 2 (N) allocated resource
blocks 570, 572. Thus, N=10 bits per TTI via PDACH are shown in the
resource block 570, 572 for subframe 0 560 and subframe 9 562.
Although not specifically shown in FIG. 5, the network may also
signal a frequency hopping pattern over the 10 subframes, i.e.,
subframe 0 560 to subframe 9 562 within a TTI or a hopping pattern
over multiple TTIs. As can be seen in FIG. 5, the signaling takes
effect 550 after t TTIs 540.
[0028] As mentioned, the location and size of the PDACH channel 530
is indicated to the UE via signaling 520 similar to the ePDCCH
channel. The UE reads the assistance information and applies it as
part of the layer one (L1) processing without involving higher
layers (latency). Signaling 520 may include RRC signaling for
indicating the location of the PDACH channel and may also specify a
frequency hopping pattern for the PDACH 530 to realize frequency
diversity. This approach is well-suited when one or a few UEs in a
cell request or can exploit interferer signaling information
signaling information. Transmitting the assistance information via
the PDACH channel 530 may be used for UE specific assistance
information. Nevertheless, the network may decide to transmit
mulit-cast transmission to a user-group of UE's via the PDACH 530.
A user-group may be defined by users that experience the same or
similar interference conditions. The size of the user-group may
vary from a single user to all users in a cell.
[0029] According to another embodiment, when the majority of served
UEs may exploit interferer signaling information signaling
information, an assistance broadcast channel (ABCH) may be used to
provide assistance information, e.g., reserving 1 to M center RBs
in the first Orthogonal Frequency Division Multiple Access (OFDMA)
symbol following the PDCCH OFDM symbols. Also, the ABCH may be
embedded into the common search space part of the PDCCH 530.
[0030] In another embodiment, when the number of bits N is
sufficiently small, the network may use the control channel, e.g.,
the PDCCH or ePDCCH 590, to signal signaling information to the
UE.
[0031] According to another embodiment, one component carrier may
be reserved solely for the transmission of assistance information.
The system bandwidth of such an assistance carrier could be
different from other component carriers, for example 1.4 MHz or
even less or even a Global System for Mobile Communications,
originally Group Special Mobile (GSM) carrier. This implies that
the UE transceiver may be capable of receiving an additional
component carrier on top of the long term evolution (LTE) carrier
aggregation (CA). Having a dedicated beacon, e.g., pilot channel
for control and synchronization, may be provided to solve a variety
of issues, in particular, time and frequency synchronization. Also,
identifying a dedicated assistance channel, e.g., PDACH 530, may be
used to provide information for DL-CoMP operation, for supporting
cognitive radio, for support information in case of small cell
deployments with many component carriers, for deployment and
interference assistance information in the presence of new carrier
type, etc.
[0032] Most likely the amount of bits that can be spent to signal
signaling information is not too high. According to a further
embodiment, the UE may suffer from interference from more than 1
interfering cell/component carrier, implying that the number of
bits to provide signaling information increases depending on the
network setup and the system bandwidth of the eNodeBs. Signaling
the signaling information of a 20 MHz cell (a component carrier)
would require 28 bits per TTI if no scheduling restriction was
applied on the eNodeB side.
[0033] In order to fully specify the signaling information with a
reasonable number of bits (N) independently of the network setup
and UE configuration, the network uses either signaling 520, which
may also include multi-cast transmission information or DCI
signaling in PDCCH/ePDCCH 590 to signal slowly changing assistance
information and/or to signal the meaning of such messages, i.e.,
how to interpret the assistance information.
[0034] However, signaling 520 via a system information block (SIB)
is typically slow (quasi-static), while DCI signaling via
PDCCH/ePDCCH or PDACH signaling is fast (per TTI, if necessary).
Also, it is assumed that the network setup and UE configuration
does not change with TTI granularity and hence RRC or multi-cast
signaling related to the assistance/signaling information can be
exchanged less frequently than per TTI. Different network vendors
may signal with differing periodicity or frequency, potentially
exploiting different options of structuring the assistance
information depending on the behavior of the particular scheduling
algorithm.
[0035] Thus, according to an embodiment, the network uses signaling
520 to inform the UE about the meaning of the assistance/signaling
information signaling information. However, the network may use
multi-cast transmission information or DCI signaling to inform the
UE about the meaning of the UE specific assistance/signaling
information signaling information.
[0036] Supporting dedicated signaling 520 or the reception of
multi-cast transmission information, e.g., via system information
blocks (SIBs) of the meaning of or of the slowly changing
assistance information, also allows the network to trade-off
multi-cell scheduler coordination, and hence DL throughput gains
from network assisted UE receivers, versus scheduling flexibility
in a cell. The more coordination the network scheduler applies, the
more efficient could the required interferer signaling information
be signaled.
[0037] Thus, according to an embodiment, the network may employ
coordination to enable efficient assistance information signaling.
For example, the network may specify by signaling 520 whether the
(up to) N bits per TTI transferred via PDACH 530 refer to: [0038]
a) A differential resource allocation or not, meaning that a change
in resource allocation is signaled. [0039] b) An accumulated
resource allocation over interfering cells or the resource
allocation of a cell (depending on the location and on the
interference configuration seen by the UE). [0040] c) A subset of
the resource blocks of the served UE, e.g. the resource blocks
where the UE is scheduled and neighboring resource blocks (time and
frequency). The network could then send staggered interference
signaling information over multiple TTIs with a certain
periodicity. The interference signaling information rotates then
through that period, and/or [0041] d) Different interfering cells
or component carriers, e.g., in a round-robin fashion. The network
could use signaling 520 to map the N bits per TTI to different
interfering cells or component carriers.
[0042] FIG. 6 illustrates interference scheduling of two cells via
a PDACH channel 600 according to an embodiment. In FIG. 6, the
network dynamically changes the meaning of the assistance
information via signaling according to an embodiment. First, the
network indicates via signaling 620 to the UE that the N assistance
bits indicate the interference scheduling of two interfering cells.
In each TTI, the network transmits N bits for an interfering cell,
e.g., Cell0 622 or Cell1 624, in a staggered fashion. FIG. 6 shows
that at a later point in time 626, the network changes the meaning
of the assistance information via signaling 628 as there is a
single cell which interferes with the UE. Each time the signaling
takes effect 650, 652 after an RRC delay of t TTI 640, 642.
[0043] The signaling 520, 620, 622 of FIG. 5 and FIG. 6 assumes
that the network configures the channel state information (CSI)
reference symbols in such a way that there is no collision between
the location of the PDACH channel 530 and the CSI reference symbols
580, 582, 680 682. However, in another embodiment, the eNodeB may
indicate to the UE that there are 4 scheduling bits per TTI in the
PDACH channel 530, 630 and that the scheduling
assistance/information has a period of 3 TTI. Thus, in the first
TTI the 4 bits may refer to the first 16 resource allocation blocks
of the UE, the 4 bits in the second TTI may refer to the next 16
resource allocation blocks of the UE and the 4 bits in the third
TTI may refer to the last 16 resource allocation blocks of the UE.
The network then ensures that the scheduling of the interferers
covering the 48 resource allocation blocks of the UE in the
interfering cell is changed in accordance with these rules, i.e.,
the interferers can be rescheduled every third TTI and certain
resource allocation blocks may be changed in a given TTI.
[0044] In yet another embodiment, signaling information may be
transmitted every 5th or Jth TTI. Accordingly, the eNodeB may
change the scheduling of the UEs in the interfering cells, at least
those that interfere with the UE, every 5th or Jth TTI. At any
rate, the network may change this pattern via signaling 520,
620.
[0045] FIG. 7 is a flowchart 700 of a method for signaling
interference signaling information for UE assistance according to
an embodiment. In FIG. 7, signaling information associated with
interfering cells is received by a user equipment (UE) from a
network node via a physical dedicated assistance channel (PDACH)
from the serving cell to the UE or an assistance broadcast channel
(ABCH) used for a plurality of UEs 710. First, the location and
size of the PDACH are identified via radio resource control (RRC)
signaling, then the bits contained in the PDACH (or ABCH) are
decoded per transmission time interval (TTI) and per interfering
cell, describing the scheduling of the interfering cells 720. Based
on the interference signaling information 730 received, parameter
estimation in the UE is dynamically adjusted in order to mitigate
the interference. Changes in interference is monitored and a
determination is made whether changes in interference by cells have
occurred 740. If not 742, the process concludes. If yes 744,
additional signaling information may be received for resource
blocks found affected by interference 750.
[0046] FIG. 8 illustrates a block diagram of an example machine 800
for signaling interference signaling information for UE assistance
according to an embodiment of any one or more of the techniques
(e.g., methodologies) discussed herein. In alternative embodiments,
the machine 800 may operate as a standalone device or may be
connected (e.g., networked) to other machines. In a networked
deployment, the machine 800 may operate in the capacity of a server
machine and/or a client machine in server-client network
environments. In an example, the machine 800 may act as a peer
machine in peer-to-peer (P2P) (or other distributed) network
environment. The machine 800 may be a personal computer (PC), a
tablet PC, a set-top box (STB), a Personal Digital Assistant (PDA),
a mobile telephone, a web appliance, a network router, switch or
bridge, or any machine capable of executing instructions
(sequential or otherwise) that specify actions to be taken by that
machine. Further, while a single machine is illustrated, the term
"machine" shall also be taken to include any collection of machines
that individually or jointly execute a set (or multiple sets) of
instructions to perform any one or more of the methodologies
discussed herein, such as cloud computing, software as a service
(SaaS), other computer cluster configurations.
[0047] Examples, as described herein, may include, or may operate
on, logic or a number of components, modules, or mechanisms.
Modules are tangible entities (e.g., hardware) capable of
performing specified operations and may be configured or arranged
in a certain manner. In an example, circuits may be arranged (e.g.,
internally or with respect to external entities such as other
circuits) in a specified manner as a module. In an example, at
least a part of one or more computer systems (e.g., a standalone,
client or server computer system) or one or more hardware
processors 802 may be configured by firmware or software (e.g.,
instructions, an application portion, or an application) as a
module that operates to perform specified operations. In an
example, the software may reside on at least one machine readable
medium. In an example, the software, when executed by the
underlying hardware of the module, causes the hardware to perform
the specified operations.
[0048] Accordingly, the term "module" is understood to encompass a
tangible entity, be that an entity that is physically constructed,
specifically configured (e.g., hardwired), or temporarily (e.g.,
transitorily) configured (e.g., programmed) to operate in a
specified manner or to perform at least part of any operation
described herein. Considering examples in which modules are
temporarily configured, a module need not be instantiated at any
one moment in time. For example, where the modules comprise a
general-purpose hardware processor 802 configured using software;
the general-purpose hardware processor may be configured as
respective different modules at different times. Software may
accordingly configure a hardware processor, for example, to
constitute a particular module at one instance of time and to
constitute a different module at a different instance of time. The
term "application," or variants thereof, is used expansively herein
to include routines, program modules, programs, components, and the
like, and may be implemented on various system configurations,
including single-processor or multiprocessor systems,
microprocessor-based electronics, single-core or multi-core
systems, combinations thereof, and the like. Thus, the term
application may be used to refer to an embodiment of software or to
hardware arranged to perform at least part of any operation
described herein.
[0049] Machine (e.g., computer system) 800 may include a hardware
processor 802 (e.g., a central processing unit (CPU), a graphics
processing unit (GPU), a hardware processor core, or any
combination thereof), a main memory 804 and a static memory 806, at
least some of which may communicate with others via an interlink (e
g, bus) 808. The machine 800 may further include a display unit
810, an alphanumeric input device 812 (e.g., a keyboard), and a
user interface (UI) navigation device 814 (e.g., a mouse). In an
example, the display unit 810, input device 812 and UI navigation
device 814 may be a touch screen display. The machine 800 may
additionally include a storage device (e.g., drive unit) 816, a
signal generation device 818 (e.g., a speaker), a network interface
device 820, and one or more sensors 821, such as a global
positioning system (GPS) sensor, compass, accelerometer, or other
sensor. The machine 800 may include an output controller 828, such
as a serial (e.g., universal serial bus (USB), parallel, or other
wired or wireless (e.g., infrared (IR)) connection to communicate
or control one or more peripheral devices (e.g., a printer, card
reader, etc.).
[0050] The storage device 816 may include at least one machine
readable medium 822 on which is stored one or more sets of data
structures or instructions 824 (e.g., software) embodying or
utilized by any one or more of the techniques or functions
described herein. The instructions 824 may also reside, at least
partially, in additional machine readable memories such as main
memory 804, static memory 806, or within the hardware processor 802
during execution thereof by the machine 800. In an example, one or
any combination of the hardware processor 802, the main memory 804,
the static memory 806, or the storage device 816 may constitute
machine readable media.
[0051] While the machine readable medium 822 is illustrated as a
single medium, the term "machine readable medium" may include a
single medium or multiple media (e.g., a centralized or distributed
database, and/or associated caches and servers) that are configured
to store the one or more instructions 824.
[0052] The term "machine readable medium" may include any medium
that is capable of storing, encoding, or carrying instructions for
execution by the machine 800 and that cause the machine 800 to
perform any one or more of the techniques of the present
disclosure, or that is capable of storing, encoding or carrying
data structures used by or associated with such instructions.
Non-limiting machine readable medium examples may include
solid-state memories, and optical and magnetic media. Specific
examples of machine readable media may include: non-volatile
memory, such as semiconductor memory devices (e.g., Electrically
Programmable Read-Only Memory (EPROM), Electrically Erasable
Programmable Read-Only Memory (EEPROM)) and flash memory devices;
magnetic disks, such as internal hard disks and removable disks;
magneto-optical disks; and CD-ROM and DVD-ROM disks.
[0053] The instructions 824 may further be transmitted or received
over a communications network 826 using a transmission medium via
the network interface device 820 utilizing any one of a number of
transfer protocols (e.g., frame relay, internet protocol (IP),
transmission control protocol (TCP), user datagram protocol (UDP),
hypertext transfer protocol (HTTP), etc.). Example communication
networks may include a local area network (LAN), a wide area
network (WAN), a packet data network (e.g., the Internet), mobile
telephone networks ((e.g., channel access methods including Code
Division Multiple Access (CDMA), Time-division multiple access
(TDMA), Frequency-division multiple access (FDMA), and Orthogonal
Frequency Division Multiple Access (OFDMA) and cellular networks
such as Global System for Mobile Communications (GSM), Universal
Mobile Telecommunications System (UMTS), CDMA 2000 1.times.*
standards and Long Term Evolution (LTE)), Plain Old Telephone
(POTS) networks, and wireless data networks (e.g., Institute of
Electrical and Electronics Engineers (IEEE) 802 family of standards
including IEEE 802.11 standards (WiFi), IEEE 802.16 standards
(WiMax.RTM.) and others), peer-to-peer (P2P) networks, or other
protocols now known or later developed.
[0054] For example, the network interface device 820 may include
one or more physical jacks (e.g., Ethernet, coaxial, or phone
jacks) or one or more antennas to connect to the communications
network 826. In an example, the network interface device 820 may
include a plurality of antennas to wirelessly communicate using at
least one of single-input multiple-output (SIMO), multiple-input
multiple-output (MIMO), or multiple-input single-output (MISO)
techniques. The term "transmission medium" shall be taken to
include any intangible medium that is capable of storing, encoding
or carrying instructions for execution by the machine 800, and
includes digital or analog communications signals or other
intangible medium to facilitate communication of such software.
Additional Notes & in Examples
[0055] Example 1 includes subject matter (such as a method or means
for performing acts), including receiving, by a user equipment
(UE), signaling information associated with interfering cells from
a network node and adjusting, by the UE, parameter estimation for
mitigating interference based on the received signaling
information.
[0056] In Example 2 the subject matter of Example 1 may optionally
include, wherein the receiving the signaling information includes
receiving information regarding variations of interfering cells
across time and frequency.
[0057] In Example 3, the subject matter of any one or more of
Examples 1-2 may optionally include, wherein receiving, by a user
equipment (UE), signaling information associated with interfering
cells from a network node comprises at least one type of
information selected from the group, consisting of an indication to
the UE via signaling of N bit assistance information per TTI via a
PDACH channel, including signaling information of a single
interfering cell for log 2(N) resource allocation blocks, an
indication of a position of PDACH channel via RRC, an indication of
a frequency hopping pattern over 10 subframes within a TTI, and a
frequency hopping pattern over multiple TTIs.
[0058] In Example 4 the subject matter of any one or more of
Examples 1-3 may optionally include, wherein the receiving
signaling information comprises receiving a number of bits per
Transmission Time Interval (TTI) and per interfering cell
describing the scheduling of the interfering cells.
[0059] In Example 5 the subject matter of any one or more of
Examples 1-4 may optionally include, wherein the receiving a number
of bits per Transmission Time Interval (TTI) and per interfering
cell is variable.
[0060] In Example 6 the subject matter of any one or more of
Examples 1-5 may optionally include, wherein the receiving
signaling information comprises signaling information of one 20 MHz
interfering cell including at least 28 bits per TTI.
[0061] In Example 7 the subject matter of any one or more of
Examples 1-6 may optionally include, wherein the receiving at least
28 bits per TTI comprises receiving 28 bits per TTI for Physical
Downlink Shared Channel (PDSCH) Resource Allocation Types 0 and
1.
[0062] In Example 8 the subject matter of any one or more of
Examples 1-7 may optionally include, wherein the receiving at least
28 bits per TTI comprises receiving less than 28 bits per TTI for
PDSCH Resource Allocation Type 2.
[0063] In Example 9 the subject matter of any one or more of
Examples 1-8 may optionally include, wherein the receiving
signaling information further comprises receiving additional
signaling information for only resource blocks determined to be
affected by interference.
[0064] In Example 10 the subject matter of any one or more of
Examples 1-9 may optionally include, wherein the receiving
signaling information comprises receiving signaling information
incrementally.
[0065] In Example 11 the subject matter of any one or more of
Examples 1-10 may optionally include, wherein the receiving
signaling information comprises receiving signaling information
only after allocation changes.
[0066] In Example 12 the subject matter of any one or more of
Examples 1-11 may optionally include, wherein the receiving
signaling information comprises receiving signaling information
over a physical dedicated assistance channel (PDACH) from the
serving cell to the UE.
[0067] In Example 13 the subject matter of any one or more of
Examples 1-12 may optionally include, wherein the receiving
signaling information over a physical dedicated assistance channel
(PDACH) from the serving cell to the UE comprises receiving
information in a data region of a subframe of the PDACH.
[0068] In Example 14 the subject matter of any one or more of
Examples 1-13 may optionally include, wherein the receiving
signaling information includes receiving identification of a
frequency hopping pattern for the PDACH to provide frequency
diversity.
[0069] In Example 15 the subject matter of any one or more of
Examples 1-14 may optionally include, wherein the receiving
signaling information comprises receiving multi-cast transmission
information directed to a plurality of UEs via PDACH allocated for
the plurality of UEs.
[0070] In Example 16 the subject matter of any one or more of
Examples 1-15 may optionally include, receiving an indication at
the UE of the location and size of the PDACH via radio resource
control signaling.
[0071] In Example 17 the subject matter of any one or more of
Examples 1-16 may optionally include, reading, by the UE, the
received assistance information and applying the received
assistance information as part of the layer one (L1) processing
without involving higher layers (latency).
[0072] In Example 18 the subject matter of any one or more of
Examples 1-17 may optionally include, wherein the receiving
signaling information comprises receiving signaling information
over an assistance broadcast channel (ABCH) used for a plurality of
UEs.
[0073] In Example 19 the subject matter of any one or more of
Examples 1-18 may optionally include, wherein the receiving
signaling information over an assistance broadcast channel (ABCH)
comprises receiving signaling information using center resource
blocks (RBs) 1 to M in the first Orthogonal Frequency Division
Multiple Access (OFDMA) symbol following the PDCCH OFDM
symbols.
[0074] In Example 20 the subject matter of any one or more of
Examples 1-19 may optionally include, wherein the receiving
signaling information over an assistance broadcast channel (ABCH)
comprises receiving signaling information embedded into the common
search space part of the PDCCH.
[0075] In Example 21 the subject matter of any one or more of
Examples 1-20 may optionally include, wherein the receiving
signaling information comprises receiving the signaling information
over a control channel when a number of bits, N, less than a
predetermined number.
[0076] In Example 22 the subject matter of any one or more of
Examples 1-21 may optionally include, wherein the receiving
signaling information comprises receiving signaling information
using a component carrier reserved solely for the transmission of
assistance information.
[0077] In Example 23 the subject matter of any one or more of
Examples 1-22 may optionally include, wherein the receiving
signaling information using a component carrier comprises receiving
signaling information using a component carrier having a bandwidth
different from other component carriers.
[0078] In Example 24 the subject matter of any one or more of
Examples 1-23 may optionally include, wherein the receiving
signaling information comprises receiving signaling information
using at least one type of signaling selected multi-cast
transmission information and DCI signaling in PDCCH/ePDCCH, the
receiving signaling information signaling at least one of slowly
changing assistance information and how to interpret the assistance
information.
[0079] In Example 25 the subject matter of any one or more of
Examples 1-24 may optionally include, wherein the receiving the
signaling information comprises receiving coordinated signaling
information including a differential resource allocation reflecting
only a change in resource allocation.
[0080] In Example 26 the subject matter of any one or more of
Examples 1-25 may optionally include, wherein the receiving the
signaling information comprises receiving coordinated signaling
information including an accumulated resource allocation over a
plurality of interfering cells.
[0081] In Example 27 the subject matter of any one or more of
Examples 1-26 may optionally include, wherein the receiving the
signaling information comprises receiving coordinated signaling
information including only a subset of the resource blocks of the
served UE to allow staggering of interference signaling information
over multiple TTIs using a predetermined periodicity.
[0082] Example 28 may include subject matter (such as a device,
apparatus, client or system) including a transceiver arranged to
receive signaling information associated with interfering cells
from a network node, wherein the transceiver is further arranged to
adjust parameter estimation for mitigating interference based on
the received signaling information to receive information regarding
variations of interfering cells across time and frequency.
[0083] In Example 29 the subject matter of Example 28 may
optionally include, wherein the transceiver is further arranged to
receive an indication to the UE via signaling N bits of assistance
information per transmission time interval (TTI) via a physical
dedicated assistance channel (PDACH) and an indication of a
position of PDACH channel via radio resource control (RRC)
signaling.
[0084] In Example 30 the subject matter of any one or more of
Examples 28-29 may optionally include, wherein the transceiver is
further arranged to receive at least one type of information
selected from the group consisting of an indication to the UE via
signaling N bits of assistance information per transmission time
interval (TTI) via a physical dedicated assistance channel (PDACH)
including signaling information of a single interfering cell for
log 2(N) resource allocation block, an indication of a position of
PDACH channel via radio resource control (RRC) signaling, an
indication of a frequency hopping pattern over 10 subframes within
a TTI and a frequency hopping pattern over multiple TTIs.
[0085] In Example 31 the subject matter of any one or more of
Examples 28-30 may optionally include, wherein the transceiver is
further arranged to receive a number of bits per transmission time
interval (TTI) and per interfering cell describing the scheduling
of the interfering cells.
[0086] In Example 32 the subject matter of any one or more of
Examples 28-31 may optionally include, wherein the transceiver is
further arranged to receive signaling information including
signaling information regarding one 20 MHz interfering cell
including at least 28 bits per TTI.
[0087] In Example 33 the subject matter of any one or more of
Examples 28-32 may optionally include, wherein the transceiver is
further arranged to receive 28 bits per TTI for Physical Downlink
Shared Channel (PDSCH) Resource Allocation Types 0 and 1.
[0088] In Example 34 the subject matter of any one or more of
Examples 28-33 may optionally include, wherein the transceiver is
further arranged to receive less than 28 bits per TTI for PDSCH
Resource Allocation Type 2.
[0089] In Example 35 the subject matter of any one or more of
Examples 28-34 may optionally include, wherein the transceiver is
further arranged to receive additional signaling information for
only resource blocks determined to be affected by interference.
[0090] In Example 36 the subject matter of any one or more of
Examples 28-35 may optionally include, wherein the transceiver is
further arranged to receive signaling information comprises
receiving signaling information incrementally.
[0091] In Example 37 the subject matter of any one or more of
Examples 28-36 may optionally include, wherein the transceiver is
further arranged to receive signaling information only after
allocation changes.
[0092] In Example 38 the subject matter of any one or more of
Examples 28-37 may optionally include, wherein the transceiver is
further arranged to receive signaling information over a physical
dedicated assistance channel (PDACH) from the serving cell to the
UE.
[0093] In Example 39 the subject matter of any one or more of
Examples 28-38 may optionally include, wherein the transceiver is
further arranged to receive information in a data region of a
subframe of the PDACH.
[0094] In Example 40 the subject matter of any one or more of
Examples 28-39 may optionally include, wherein the transceiver is
further arranged to receive identification of a frequency hopping
pattern for the PDACH to provide frequency diversity.
[0095] In Example 41 the subject matter of any one or more of
Examples 28-40 may optionally include, wherein the transceiver is
further arranged to receive multi-cast information directed to a
plurality of UEs.
[0096] In Example 42 the subject matter of any one or more of
Examples 28-41 may optionally include, wherein the transceiver is
further arranged to identify from the received signaling
information a location and size of the PDACH via radio resource
control signaling.
[0097] In Example 43 the subject matter of any one or more of
Examples 28-42 may optionally include, wherein the transceiver is
further arranged to reading the received assistance information and
apply the received assistance information as part of the layer one
(L1) processing without involving higher layers (latency).
[0098] In Example 44 the subject matter of any one or more of
Examples 28-43 may optionally include, wherein the transceiver is
further arranged to receive signaling information over an
assistance broadcast channel (ABCH) used for a plurality of
UEs.
[0099] In Example 45 the subject matter of any one or more of
Examples 28-44 may optionally include, wherein the transceiver
receives signaling information using center resource blocks (RBs) 1
to M in the first Orthogonal Frequency Division Multiple Access
(OFDMA) symbol following the PDCCH OFDM symbols.
[0100] In Example 46 the subject matter of any one or more of
Examples 28-45 may optionally include, wherein the transceiver
receives signaling information embedded into the common search
space part of the PDCCH.
[0101] In Example 47 the subject matter of any one or more of
Examples 28-46 may optionally include, wherein the transceiver is
further arranged to receive signaling information over a control
channel when a number of bits, N, is less than a predetermined
number.
[0102] In Example 48 the subject matter of any one or more of
Examples 28-47 may optionally include, wherein the transceiver is
further arranged to receive signaling information using a component
carrier reserved solely for the transmission of assistance
information.
[0103] In Example 49 the subject matter of any one or more of
Examples 28-48 may optionally include, wherein the transceiver is
further arranged to receive signaling information using a component
carrier having a bandwidth different from other component
carriers.
[0104] In Example 50 the subject matter of any one or more of
Examples 28-49 may optionally include, wherein the transceiver is
further arranged to receive signaling information using at least
one type of signaling selected from multi-cast transmission
information and DCI signaling in a physical downlink control
channel, the receiving signaling information signaling at least one
of slowly changing assistance information and how to interpret the
assistance information.
[0105] In Example 51 the subject matter of any one or more of
Examples 28-50 may optionally include, wherein the transceiver is
further arranged to receive coordinated signaling information
including a differential resource allocation reflecting only a
change in resource allocation.
[0106] In Example 52 the subject matter of any one or more of
Examples 28-51 may optionally include, wherein the transceiver is
further arranged to receive coordinated signaling information
including an accumulated resource allocation over a plurality of
interfering cells.
[0107] In Example 53 the subject matter of any one or more of
Examples 28-52 may optionally include, wherein the transceiver is
further arranged to receive coordinated signaling information
including only a subset of the resource blocks of the served UE to
allow staggering of interference signaling information over
multiple TTIs using a predetermined periodicity.
[0108] Example 54 may include subject matter (such as means for
performing acts or machine readable medium including instructions
that, when executed by the machine, cause the machine to perform
acts) including signaling information associated with interfering
cells from a network node and adjusting, by the UE, parameter
estimation for mitigating interference based on the received
signaling information.
[0109] In Example 55 the subject matter of Example 54 may
optionally include, wherein the receiving the signaling information
includes receiving information regarding variations of interfering
cells across time and frequency.
[0110] In Example 56 the subject matter of any one or more of
Examples 54-55 may optionally include, wherein receiving, by a user
equipment (UE), signaling information associated with interfering
cells from a network node comprises at least one type of
information selected from the group consisting of an indication to
the UE via signaling that the N bit assistance information per TTI
via a PDACH channel including signaling information of a single
interfering cell for log 2(N) resource allocation block, an
indication of a position of PDACH channel via RRC, an indication of
a frequency hopping pattern over 10 subframes within a TTI and a
frequency hopping pattern over multiple TTIs.
[0111] In Example 57 the subject matter of any one or more of
Examples 54-56 may optionally include, wherein the receiving
signaling information comprises receiving a number of bits per
Transmission Time Interval (TTI) and per interfering cell
describing the scheduling of the interfering cells.
[0112] In Example 58 the subject matter of any one or more of
Examples 54-57 may optionally include, wherein the receiving a
number of bits per Transmission Time Interval (TTI) and per
interfering cell is variable.
[0113] In Example 59 the subject matter of any one or more of
Examples 54-58 may optionally include, wherein the receiving
signaling information comprises signaling information of one 20 MHz
interfering cell including at least 28 bits per TTI.
[0114] In Example 60 the subject matter of any one or more of
Examples 54-59 may optionally include, wherein the receiving at
least 28 bits per TTI comprises receiving 28 bits per TTI for
Physical Downlink Shared Channel (PDSCH) Resource Allocation Types
0 and 1.
[0115] In Example 61 the subject matter of any one or more of
Examples 54-60 may optionally include, wherein the receiving at
least 28 bits per TTI comprises receiving less than 28 bits per TTI
for PDSCH Resource Allocation Type 2.
[0116] In Example 62 the subject matter of any one or more of
Examples 54-61 may optionally include, wherein the receiving
signaling information further comprises receiving additional
signaling information for only resource blocks determined to be
affected by interference.
[0117] In Example 63 the subject matter of any one or more of
Examples 54-62 may optionally include, wherein the receiving
signaling information comprises receiving signaling information
incrementally.
[0118] In Example 64 the subject matter of any one or more of
Examples 54-63 may optionally include, wherein the receiving
signaling information comprises receiving signaling information
only after allocation changes.
[0119] In Example 65 the subject matter of any one or more of
Examples 54-64 may optionally include, wherein the receiving
signaling information comprises receiving signaling information
over a physical dedicated assistance channel (PDACH) from the
serving cell to the UE.
[0120] In Example 66 the subject matter of any one or more of
Examples 54-65 may optionally include, wherein the receiving
signaling information over a physical dedicated assistance channel
(PDACH) from the serving cell to the UE comprises receiving
information in a data region of a subframe of the PDACH.
[0121] In Example 67 the subject matter of any one or more of
Examples 54-66 may optionally include, wherein the receiving
signaling information includes receiving identification of a
frequency hopping pattern for the PDACH to provide frequency
diversity.
[0122] In Example 68 the subject matter of any one or more of
Examples 54-67 may optionally include, wherein the receiving
signaling information comprises receiving multicast information
directed to a plurality of UEs via PDACH allocated for the
plurality of UEs.
[0123] In Example 69 the subject matter of any one or more of
Examples 54-68 may optionally include, receiving an indication at
the UE of the location and size of the PDACH via radio resource
control signaling.
[0124] In Example 70 the subject matter of any one or more of
Examples 54-69 may optionally include, reading, by the UE, the
received assistance information and applying the received
assistance information as part of the layer one (L1) processing
without involving higher layers (latency).
[0125] In Example 71 the subject matter of any one or more of
Examples 54-70 may optionally include, wherein the receiving
signaling information comprises receiving signaling information
over an assistance broadcast channel (ABCH) used for a plurality of
UEs.
[0126] In Example 72 the subject matter of any one or more of
Examples 54-71 may optionally include, wherein the receiving
signaling information over an assistance broadcast channel (ABCH)
comprises receiving signaling information using center resource
blocks (RBs) 1 to M in the first Orthogonal Frequency Division
Multiple Access (OFDMA) symbol following the PDCCH OFDM
symbols.
[0127] In Example 73 the subject matter of any one or more of
Examples 54-72 may optionally include, wherein the receiving
signaling information over an assistance broadcast channel (ABCH)
comprises receiving signaling information embedded into the common
search space part of the PDCCH.
[0128] In Example 74 the subject matter of any one or more of
Examples 54-73 may optionally include, wherein the receiving
signaling information comprises receiving the signaling information
over a control channel when a number of bits, N, less than a
predetermined number.
[0129] In Example 75 the subject matter of any one or more of
Examples 54-74 may optionally include, wherein the receiving
signaling information comprises receiving signaling information
using a component carrier reserved solely for the transmission of
assistance information.
[0130] In Example 76 the subject matter of any one or more of
Examples 54-75 may optionally include, wherein the receiving
signaling information using a component carrier comprises receiving
signaling information using a component carrier having a bandwidth
different from other component carriers.
[0131] In Example 77 the subject matter of any one or more of
Examples 54-76 may optionally include, wherein the receiving
signaling information comprises receiving signaling information
using at least one type of signaling selected from multi-cast
information and DCI signaling in PDCCH/ePDCCH, the receiving
signaling information signaling at least one of slowly changing
assistance information and how to interpret the assistance
information.
[0132] In Example 78 the subject matter of any one or more of
Examples 54-77 may optionally include, wherein the receiving the
signaling information comprises receiving coordinated signaling
information including a differential resource allocation reflecting
only a change in resource allocation.
[0133] In Example 79 the subject matter of any one or more of
Examples 54-78 may optionally include, wherein the receiving the
signaling information comprises receiving coordinated signaling
information including an accumulated resource allocation over a
plurality of interfering cells.
[0134] In Example 80 the subject matter of any one or more of
Examples 54-79 may optionally include, wherein the receiving the
signaling information comprises receiving coordinated signaling
information including only a subset of the resource blocks of the
served UE to allow staggering of interference signaling information
over multiple TTIs using a predetermined periodicity.
[0135] The above detailed description includes references to the
accompanying drawings, which form a part of the detailed
description. The drawings show, by way of illustration, specific
embodiments that may be practiced. These embodiments are also
referred to herein as "examples." Such examples may include
elements in addition to those shown or described. However, also
contemplated are examples that include the elements shown or
described. Moreover, also contemplate are examples using any
combination or permutation of those elements shown or described (or
one or more aspects thereof), either with respect to a particular
example (or one or more aspects thereof), or with respect to other
examples (or one or more aspects thereof) shown or described
herein.
[0136] Publications, patents, and patent documents referred to in
this document are incorporated by reference herein in their
entirety, as though individually incorporated by reference. In the
event of inconsistent usages between this document and those
documents so incorporated by reference, the usage in the
incorporated reference(s) are supplementary to that of this
document; for irreconcilable inconsistencies, the usage in this
document controls.
[0137] In this document, the terms "a" or "an" are used, as is
common in patent documents, to include one or more than one,
independent of any other instances or usages of "at least one" or
"one or more." In this document, the term "or" is used to refer to
a nonexclusive or, such that "A or B" includes "A but not B," "B
but not A," and "A and B," unless otherwise indicated. In the
appended claims, the terms "including" and "in which" are used as
the plain-English equivalents of the respective terms "comprising"
and "wherein." Also, in the following claims, the terms "including"
and "comprising" are open-ended, that is, a system, device,
article, or process that includes elements in addition to those
listed after such a term in a claim are still deemed to fall within
the scope of that claim. Moreover, in the following claims, the
terms "first," "second," and "third," etc. are used merely as
labels, and are not intended to suggest a numerical order for their
objects.
[0138] The above description is intended to be illustrative, and
not restrictive. For example, the above-described examples (or one
or more aspects thereof) may be used in combination with others.
Other embodiments may be used, such as by one of ordinary skill in
the art upon reviewing the above description. The Abstract is to
allow the reader to quickly ascertain the nature of the technical
disclosure, for example, to comply with 37 C.F.R. .sctn.1.72(b) in
the United States of America. It is submitted with the
understanding that it will not be used to interpret or limit the
scope or meaning of the claims. Also, in the above Detailed
Description, various features may be grouped together to streamline
the disclosure. However, the claims may not set forth features
disclosed herein because embodiments may include a subset of said
features. Further, embodiments may include fewer features than
those disclosed in a particular example. Thus, the following claims
are hereby incorporated into the Detailed Description, with a claim
standing on its own as a separate embodiment. The scope of the
embodiments disclosed herein is to be determined with reference to
the appended claims, along with the full scope of equivalents to
which such claims are entitled.
* * * * *