Signaling for downlink coordinated multipoint in a wireless communication system

• US 9,736,780 B2
• Filed: 05/02/2016
• Issued: 08/15/2017
• 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): Onamuti, Gbemileke J
• Application Number:
  US15/144,117
• Publication Number:
  US 20160261387A1
• Time in Patent Office: 470 Days
• 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 36/0061 : 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 72/044 : 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:

means to obtain, from an evolved Node B (eNB) via a wireless communication network, configuration information for a plurality of channel state information (CSI) processes;

means to obtain, from the eNB, respective parameters to indicate a subset of precoding matrix indicators within a codebook to be used by the UE for CSI reporting for respective individual CSI processes of the plurality of CSI processes;

means to obtain, from the eNB, a message including a CSI request field, wherein the CSI request field is to indicate one or more CSI processes, of the plurality of CSI processes, for which the UE is to generate CSI feedback;

means to generate the CSI feedback for the one or more CSI processes based on the respective parameters; and

means to send the CSI feedback to the eNB.

2. The apparatus of claim 1, wherein the respective parameters are a CodebookSubsetRestriction parameter and are included in the configuration information for each individual CSI process.

3. The apparatus of claim 1, wherein the CSI request field is to have:

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

or a second value to indicate that the UE is to provide a CSI report for a second set of the CSI processes.

4. The apparatus of claim 3, wherein the message is a first message, and wherein the apparatus further comprises means to obtain a second message including a CSI request field having a third value to indicate that no CSI feedback is triggered by the second message.

5. The apparatus of claim 3, wherein the first set includes a subset of less than all CSI processes associated with a serving cell as configured by the configuration information.

6. The apparatus of claim 5, wherein the plurality of CSI processes include CSI processes associated with respective ones of a plurality of cells including the serving cell, and wherein the apparatus further comprises means to identify the first set of CSI processes associated with the serving cell based on receiving the message on the serving cell.

7. The apparatus of claim 1, wherein the configuration information for the plurality of CSI processes is obtained via radio resource control (RRC) signaling, and wherein the message is a downlink control information (DCI) message.

8. The apparatus of claim 1, wherein individual CSI processes of the one or more CSI processes are associated with a CSI reference signal (CSI-RS) resource and a CSI-interference measurement (CSI-IM) resource.

9. 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).

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

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

means to send, to a user equipment (UE) via the wireless communication network, configuration information for a plurality of channel state information (CSI) processes;

means to send, to the UE via the wireless communication network, respective parameters to indicate a subset of precoding matrix indicators within a codebook to be used by the UE for CSI reporting associated with a respective individual CSI process of the plurality of CSI processes;

means to send, to the UE, a message including a CSI request field, wherein the CSI request field is to indicate one or more CSI processes, of the plurality of CSI processes, for which the UE is to generate CSI feedback based on the respective parameters; and

means to obtain, from the UE, CSI feedback for the one or more CSI processes, the CSI feedback based on the respective parameters.

12. The apparatus of claim 11, wherein the respective parameters are a CodebookSubsetRestriction parameter and are included in the configuration information.

13. The apparatus of claim 11, wherein the CSI request field is to have:

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

or a second value to indicate that the UE is to provide a CSI report for a second set of the CSI processes.

14. The apparatus of claim 13, wherein the message is a first message, and wherein the instructions, when executed, further cause the eNB to transmit a second message to the UE including a CSI request field having a third value to indicate that no CSI feedback is triggered by the second message.

15. The apparatus of claim 13, wherein the first set includes a subset of less than all CSI processes associated with a serving cell as configured by the configuration information.

16. The apparatus of claim 11, wherein the plurality of CSI processes include CSI processes associated with respective ones of a plurality of cells.

17. The apparatus of claim 11, wherein the configuration information for the plurality of CSI processes is transmitted via radio resource control (RRC) signaling, and wherein the message is a downlink control information (DCI) message.

18. The apparatus of claim 11, 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).