Signaling for downlink coordinated multipoint in a wireless communication system

• US 9,083,479 B2
• Filed: 12/28/2012
• Issued: 07/14/2015
• Est. Priority Date: 05/11/2012
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: Etemad, Kamran, Davydov, Alexei
• Primary Examiner(s): Rinehart, Mark
• Assistant Examiner(s): ONAMUTI, GBEMILEKE J
• Application Number:
  US13/730,289
• Publication Number:
  US 20130301548A1
• Time in Patent Office: 928 Days
• Field of Search: 370/328, 370/329, 370/252, 375/267
• US Class Current: 1/1
• CPC Class Codes: H04B 1/56 with provision for simultaneous communication in two directions
• CPC Class Codes: H04B 15/00 Suppression or limitation of noise or interference by means associated with receiver H04B1/10
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/0473 taking constraints in layer or codeword to antenna mapping into account
• CPC Class Codes: H04B 7/0486 taking channel rank into account
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/063 Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• CPC Class Codes: H04B 7/0639 Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
• CPC Class Codes: H04B 7/0647 Variable feedback rate
• CPC Class Codes: H04B 7/065 Variable contents, e.g. long-term or short-short
• CPC Class Codes: H04B 7/26 at least one of which is mobile
• CPC Class Codes: H04J 3/00 Time-division multiplex systems H04J14/00 takes precedence; relay systems H04B7/14; selecting techniques H04Q
• CPC Class Codes: H04J 3/1694 Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers Passive Optical Networks H04Q11/0062
• CPC Class Codes: H04J 3/26 in which the information and the address are simultaneously transmitted
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/1803 Stop-and-wait protocols
• CPC Class Codes: H04L 1/1822 involving configuration of automatic repeat request [ARQ] with parallel processes
• CPC Class Codes: H04L 27/2627 : Modulators
• CPC Class Codes: H04L 5/0007 : the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/001 : the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0035 : Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0053 : Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0073 : Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04L 5/0096 : Indication of changes in allocation
• CPC Class Codes: H04L 5/14 : Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 5/1469 : using time-sharing
• CPC Class Codes: H04L 65/00 : Network arrangements, protocols or services for supporting real-time applications in data packet communication real-time or near real-time messaging, e.g. instant messaging [IM] H04L51/04; selective video distribution H04N21/00
• CPC Class Codes: H04L 69/22 : Parsing or analysis of headers
• CPC Class Codes: H04L 69/324 : in the data link layer [OSI layer 2], e.g. HDLC
• CPC Class Codes: H04W 16/14 : Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 24/02 : Arrangements for optimising operational condition
• CPC Class Codes: H04W 24/10 : Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 36/00 : Hand-off or reselection arrangements
• CPC Class Codes: H04W 36/0061 : of neighbour cell information
• CPC Class Codes: H04W 36/0088 : Scheduling hand-off measurements
• CPC Class Codes: H04W 36/0094 : Definition of hand-off measurement parameters
• CPC Class Codes: H04W 36/04 : Reselecting a cell layer in multi-layered cells
• CPC Class Codes: H04W 36/16 : Performing reselection for specific purposes
• CPC Class Codes: H04W 36/22 : for handling the traffic
• CPC Class Codes: H04W 4/02 : Services making use of location information
• CPC Class Codes: H04W 4/023 : using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
• CPC Class Codes: H04W 4/029 : Location-based management or tracking services
• CPC Class Codes: H04W 4/06 : Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 4/16 : Communication-related supplementary services, e.g. call-transfer or call-hold
• CPC Class Codes: H04W 4/70 : Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 4/90 : Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
• CPC Class Codes: H04W 48/20 : Selecting an access point
• CPC Class Codes: H04W 52/0209 : in terminal devices terminal devices per se H04W88/02
• CPC Class Codes: H04W 52/0212 : managed by the network, e.g. network or access point is master and terminal is slave
• CPC Class Codes: H04W 52/0216 : using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/0225 : using monitoring of external events, e.g. the presence of a signal
• CPC Class Codes: H04W 52/0229 : where the received signal is a wanted signal
• CPC Class Codes: H04W 52/0235 : where the received signal is a power saving command
• CPC Class Codes: H04W 52/0251 : using monitoring of local events, e.g. events related to user activity
• CPC Class Codes: H04W 56/00 : Synchronisation arrangements
• CPC Class Codes: H04W 56/001 : Synchronization between nodes
• CPC Class Codes: H04W 72/02 : Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/04 : Wireless resource allocation
• CPC Class Codes: H04W 72/044 : based on the type of the allocated resource
• CPC Class Codes: H04W 72/12 : Wireless traffic scheduling
• CPC Class Codes: H04W 72/1215 : for collaboration of different radio technologies
• CPC Class Codes: H04W 72/21 : in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 : in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/27 : between access points
• CPC Class Codes: H04W 72/30 : Resource management for broadcast services
• CPC Class Codes: H04W 72/51 : based on terminal or device properties
• CPC Class Codes: H04W 72/54 : based on quality criteria
• CPC Class Codes: H04W 72/541 : using the level of interference
• CPC Class Codes: H04W 72/542 : using measured or perceived quality
• CPC Class Codes: H04W 72/56 : based on priority criteria
• CPC Class Codes: H04W 76/14 : Direct-mode setup
• CPC Class Codes: H04W 76/18 : Management of setup rejection or failure
• CPC Class Codes: H04W 76/27 : Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 76/28 : Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: H04W 88/02 : Terminal devices
• CPC Class Codes: H04W 88/06 : adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: H04W 88/08 : Access point devices
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

Embodiments herein describe apparatuses, systems, and methods for signaling to support downlink coordinated multipoint (CoMP) communications with a user equipment (UE) in a wireless communication network. In embodiments, the UE may be configured with a plurality of channel state information (CSI) processes (e.g., via radio resource control (RRC) signaling) to use for providing CSI feedback to an evolved Node B (eNB) to support downlink CoMP communications. The UE may be configured with a plurality of sets of CSI processes. The UE may further receive a downlink control information (DCI) message from the eNB that indicates one of the configured sets of CSI processes on which the UE is to provide CSI feedback to the UE. The UE may generate the CSI feedback for the indicated set of CSI processes, and transmit the CSI feedback to the eNB in a CSI report.

Claims

1. An apparatus to be employed by a user equipment (UE), the apparatus comprising:

communications circuitry to communicate with an evolved Node B (eNB) over a wireless communications network; and

feedback circuitry coupled to the communications circuitry, the feedback circuitry to;

receive, via the communications circuitry, a downlink control information (DCI) message from the eNB, the DCI message including a two-bit channel state information (CSI) request field, wherein the CSI request field is to have;

a first value to indicate that the feedback circuitry is to provide a CSI report for a first set of pre-configured CSI processes associated with a serving cell, wherein individual CSI processes are associated with a CSI reference signal (CSI-RS) resource and a CSI-interference measurement (CSI-IM) resource;

a second value to indicate that the feedback circuitry is to provide a CSI report for a second set of pre-configured CSI processes;

or

a third value to indicate that the feedback circuitry is to provide a CSI report for a third set of pre-configured CSI processes;

receive a CodebookSubsetRestriction parameter associated with individual CSI processes to indicate a subset of precoding matrix indicators within a codebook to be used by the UE for CSI reporting;

generate CSI feedback for CSI processes indicated by the CSI request field based on the CodebookSubsetRestriction parameter; and

transmit, via the communications circuitry, a CSI report to the eNB on a physical uplink shared channel (PUSCH), the CSI report including the generated CSI feedback.

2. The apparatus of claim 1, wherein the DCI message is a first DCI message, and wherein the feedback circuitry is further configured to receive a second DCI message including a CSI request field having a fourth value to indicate that no CSI report is triggered by the second DCI message.

3. The apparatus of claim 1, wherein the second and third sets of CSI processes are configured via radio resource control (RRC) signaling with the UE.

4. The apparatus of claim 3, wherein the first set includes a subset of less than all CSI processes associated with the serving cell as configured via radio resource control (RRC) signaling with the UE.

5. The apparatus of claim 3, wherein the first set includes all CSI processes associated with the serving cell.

6. The apparatus of claim 4, wherein a subset of CSI processes are configured for the UE, via RRC signaling, associated with respective ones of a plurality of cells including the serving cell, and wherein the UE is to identify the first set of pre-configured CSI processes for the serving cell based on receiving the DCI message on the serving cell.

7. The apparatus of claim 1, wherein the second set and third set of pre-configured CSI processes include one or more common CSI processes.

8. The apparatus of claim 1, wherein the generated CSI feedback includes a channel quality indicator (CQI), a precoding matrix indicator (PMI), one or more selected subbands, or a rank indicator (RI).

9. The apparatus of claim 1, wherein the CSI feedback is to support downlink coordinated multipoint (CoMP) transmission to the UE.

10. The apparatus of claim 1, wherein the CSI report includes CSI feedback for a plurality of CSI processes concatenated in increasing order of CSI process index.

11. The apparatus of claim 1, further comprising:

an applications processor coupled to the communications circuitry; and

a memory coupled to the applications processor and configured as a package-on-package (PoP) with the applications processor.

12. An apparatus to be employed by an evolved Node B (eNB) of a wireless communication network, the apparatus comprising:

coordinated multipoint (CoMP) circuitry to manage downlink CoMP communications with a user equipment (UE) over the wireless communication network; and

aperiodic feedback circuitry coupled to the CoMP circuitry, the aperiodic feedback circuitry to;

transmit a downlink control information (DCI) message to the UE, the DCI message including a two-bit channel state information (CSI) request field, wherein the CSI request field is to have;

a first value to indicate that the UE is to provide a CSI report for a first set of pre-configured CSI processes associated with a serving cell, wherein individual CSI processes are associated with a CSI reference signal (CSI-RS) resource and a CSI-interference measurement (CSI-IM) resource;

a second value to indicate that the UE is to provide a CSI report for a second set of pre-configured CSI processes;

or

a third value to indicate that the UE is to provide a CSI report for a third set of pre-configured CSI processes;

transmit a codebookSubsetRestriction parameter associated with individual CSI processes to indicate a subset of precoding matrix indicators within a codebook to be used by the UE for CSI reporting; and

receive a CSI report from the UE on a physical uplink shared channel (PUSCH), the CSI report including CSI feedback for the CSI processes identified by the CSI request field, wherein the CSI report is to support the downlink CoMP communications with the UE.

13. The apparatus of claim 12, wherein the DCI message is a first DCI message, and wherein the aperiodic feedback circuitry is further to receive a second DCI message including a CSI request field having a fourth value to indicate that no CSI report is triggered by the second DCI message.

14. The apparatus of claim 12, wherein the second and third sets of pre-configured CSI processes are configured via radio resource control (RRC) signaling.

15. The apparatus of claim 12, wherein the first set includes a subset of less than all CSI processes associated with the serving cell.

16. The apparatus of claim 12, wherein the first set includes all CSI processes associated with the serving cell.

17. The apparatus of claim 12, wherein the second set and third set of pre-configured CSI processes include one or more common CSI processes.

18. The apparatus of claim 12, wherein the generated CSI feedback includes a channel quality indicator (CQI), a precoding matrix indicator (PMI), one or more selected subbands, or a rank indicator (RI).

19. The apparatus of claim 12, wherein the CoMP management circuitry is further to configure the individual CSI processes at the UE via higher layer signaling.

20. The apparatus of claim 12, further comprising an Ethernet network adapter.

21. An apparatus to be employed by a user equipment (UE), the apparatus comprising circuitry to:

receive a first bitmap, from an evolved Node B (eNB) over a wireless communication network, the first bitmap indicating one or more CSI processes that are included in a first set of CSI processes, wherein individual CSI processes are associated with a CSI reference signal (CSI-RS) resource and a CSI-interference measurement (CSI-IM) resource;

receive a second bitmap, from the eNB, indicating one or more CSI processes that are included in a second set of CSI processes;

receive a CodebookSubsetRestriction parameter associated with individual CSI processes to indicate a subset of precoding matrix indicators within a codebook to be used by the UE for CSI reporting;

receive a downlink control information (DCI) message from the eNB, the DCI message including a two-bit channel state information (CSI) request field to request CSI feedback to support downlink coordinated multipoint (CoMP) transmission to the UE, wherein the CSI request field is to have;

a first value to indicate that the UE is to provide CSI feedback for the first set of CSI processes;

or

a second value to indicate that the UE is to provide CSI feedback for the second set of CSI processes; and

generate CSI feedback for the CSI processes indicated by the CSI request field based on the CodebookSubsetRestriction parameter; and

transmit a CSI report to the eNB including the generated CSI feedback.

22. The apparatus of claim 21, wherein the DCI message is a first DCI message, and wherein the circuitry to receive the first DCI message is further configured to receive a second DCI message including a CSI request field having a third value to indicate that the UE is to provide a CSI report for a third set of CSI processes configured for a serving cell.

23. The apparatus of claim 22, wherein the circuitry to receive the first DCI message is further configured to receive a third DCI message including a CSI request field having a fourth value to indicate that no CSI report is triggered by the third DCI message.

24. The apparatus of claim 21, wherein the DCI message is a first DCI message, and wherein the circuitry to receive the first DCI message is further configured to receive a second DCI message including a CSI request field having a third value to indicate that the UE is to provide a CSI report for the first set and the second set of CSI processes.

25. The apparatus of claim 21, wherein the first bitmap includes a plurality of bits, wherein individual bits correspond to individual CSI processes to indicate if the CSI process is included in the first set of CSI processes, wherein the plurality of bits are ordered in the bitmap according to a cell index, and wherein the plurality of bits corresponding to CSI processes associated with a same cell index are ordered by a CSI process identifier (ID).

26. The apparatus of claim 21, wherein the first and second bitmaps are received via radio resource control (RRC) signaling.

27. The apparatus of claim 21, wherein the first and second sets of CSI processes include one or more common CSI processes.

28. The apparatus of claim 21, wherein the CSI report is transmitted on a physical uplink shared channel (PUSCH).

29. An apparatus to be employed by a user equipment (UE) of a wireless communication network comprising:

coordinated multipoint (CoMP) circuitry to receive configuration information related to individual channel state information (CSI) processes for use by the UE to report CSI feedback to support downlink CoMP transmission to the UE, wherein individual CSI processes are associated with a CSI reference signal (CSI-RS) resource and a CSI-interference measurement (CSI-IM) resource, and wherein the configuration information includes a CodebookSubsetRestriction parameter associated with individual CSI processes to indicate a subset of precoding matrix indicators within a codebook to be used by the UE for CSI reporting; and

feedback circuitry coupled to the CoMP circuitry, the feedback circuitry to;

generate CSI feedback for a plurality of configured CSI processes;

generate a CSI report including the CSI feedback for the plurality of configured CSI processes concatenated according to a CSI process index of the CSI process; and

transmit the CSI report to an evolved Node B (eNB) of the wireless communication network.

30. The apparatus of claim 29, wherein the CSI report includes CSI feedback for CSI processes of different component carriers, wherein the CSI feedback includes a channel quality indicator (CQI), a precoding matrix indicator (PMI), or a rank indicator (RI), and wherein the CSI feedback are concatenated first in increasing order of CSI process index for CSI processes of a given cell and then in increasing order of cell index.

31. The apparatus of claim 29, wherein the CSI report includes CSI feedback for a first CSI process and a second CSI process, and wherein a shared component of CSI feedback that is the same of the first and second CSI processes is reported only once in the CSI report.

32. The apparatus of claim 31, wherein the shared component is a rank indicator (RI) associated with the first and second CSI processes.

33. The apparatus of claim 29, wherein the CSI report is encoded using turbo coding and cyclic redundancy check (CRC) encoding.