Periodic channel state information reporting for coordinated multipoint (coMP) systems

• US 9,544,801 B2
• Filed: 11/29/2012
• Issued: 01/10/2017
• Est. Priority Date: 08/03/2012
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: Han, Seunghee, Davydov, Alexei, Fwu, Jong-Kae, Etemad, Kamran
• Primary Examiner(s): Mian, Omer S
• Application Number:
  US13/688,794
• Publication Number:
  US 20140036664A1
• Time in Patent Office: 1,503 Days
• US Class Current: 1/1
• CPC Class Codes: H04B 17/27 for locating or positioning the transmitter
• CPC Class Codes: H04L 1/0013 Rate matching, e.g. puncturing or repetition of code symbols
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0031 Multiple signaling transmission H04L1/1664, F15 take precedence
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 41/082 the condition being updates or upgrades of network functionality
• CPC Class Codes: H04L 41/0836 to enhance reliability, e.g. reduce downtime
• CPC Class Codes: H04L 43/0811 by checking connectivity
• CPC Class Codes: H04L 45/306 Route determination based on the nature of the carried application
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04L 65/1016 IP multimedia subsystem [IMS]
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 65/613 for the control of the source by the destination control signals issued by the client directed to the server or network components specially adapted for selective content distribution H04N21/637
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04L 67/51 Discovery or management thereof, e.g. service location protocol [SLP] or web services
• CPC Class Codes: H04L 67/75 Indicating network or usage conditions on the user display
• CPC Class Codes: H04N 21/23439 for generating different versions
• CPC Class Codes: H04N 21/25825 : involving client display capabilities, e.g. screen resolution of a mobile phone optimising the visualisation of content during browsing in the Internet G06F16/9577; processing of terminal status or physical abilities in wireless networks H04W8/22; authentication in wireless network security H04W12/06
• CPC Class Codes: H04W 12/06 : Authentication
• CPC Class Codes: H04W 16/18 : Network planning tools
• CPC Class Codes: H04W 16/28 : using beam steering
• CPC Class Codes: H04W 24/02 : Arrangements for optimising operational condition
• CPC Class Codes: H04W 24/04 : Arrangements for maintaining operational condition
• CPC Class Codes: H04W 28/0205 : at the air interface dynamic wireless traffic scheduling H04W72/12
• CPC Class Codes: H04W 28/0236 : radio quality, e.g. interference, losses or delay
• CPC Class Codes: H04W 28/065 : using assembly or disassembly of packets
• CPC Class Codes: H04W 28/12 : using signalling between network elements
• CPC Class Codes: H04W 4/02 : Services making use of location information
• CPC Class Codes: H04W 4/70 : Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 40/20 : based on geographic position or location
• CPC Class Codes: H04W 40/246 : Connectivity information discovery
• CPC Class Codes: H04W 48/14 : using user query or user detection
• CPC Class Codes: H04W 48/18 : Selecting a network or a communication service
• CPC Class Codes: H04W 52/00 : Power management, e.g. TPC [Transmission Power Control], power saving or power classes gain control in transmitters or power amplifiers H03G3/3042
• 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 52/0229 : where the received signal is a wanted signal
• CPC Class Codes: H04W 52/0258 : controlling an operation mode according to history or models of usage information, e.g. activity schedule or time of day
• CPC Class Codes: H04W 72/21 : in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 76/10 : Connection setup
• CPC Class Codes: H04W 76/11 : Allocation or use of connection identifiers
• CPC Class Codes: H04W 76/14 : Direct-mode setup
• CPC Class Codes: H04W 76/15 : Setup of multiple wireless link connections
• CPC Class Codes: H04W 76/16 : Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
• CPC Class Codes: H04W 76/28 : Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• 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: Y02D 30/70 : in wireless communication networks

Abstract

Technology for periodic channel state information (CSI) reporting in a coordinated multipoint (CoMP) scenario is disclosed. One method can include a user equipment (UE) generating a plurality of CSI reports for transmission in a subframe for a plurality of CSI processes. Each CSI report can correspond to a CSI process with a CSIProcessIndex. The UE can drop CSI reports corresponding to CSI processes except a CSI process with a lowest CSIProcessIndex. The UE can transmit at least one CSI report for the CSI process to an evolved Node B (eNB).

Claims

1. A user equipment (UE) operable to report periodic channel state information (CSI) configured in a specified transmission mode (TM), having computer circuitry configured to:

generate, at the UE, a plurality of CSI reports for serving cells for transmission in a subframe for a plurality of CSI processes for the UE operating in the specified TM used in a coordinated multipoint (CoMP) operation and carrier aggregation (CA) configuration, each of the CSI processes include a respective configuration of a channel and a corresponding interference part, wherein each CSI report corresponds to a physical uplink control channel (PUCCH) reporting type among a plurality of PUCCH reporting types, a CSI process among a plurality of CSI processes having a CSI process index (CSIProcessIndex) and a serving cell index (ServCellIndex) among a plurality of ServCellIndexes;

determine different priorities corresponding to each of the plurality of PUCCH reporting types;

determine a first collision between CSI reports, among the plurality of CSI reports, having PUCCH reporting types with equal priorities in the subframe and, upon determining the first collision, drop CSI reports corresponding to all CSI processes except a CSI process having the lowest CSIProcessIndex, wherein a CSI report for a specific ServCellIndex with a lower CSIProcessIndex has a higher priority than a CSI report for the specific ServCellIndex with a CSIProcessIndex higher than the lower CSIProcessIndex;

determine a second collision between CSI reports, after determining the first collision, among retained ones of the plurality of CSI reports, having CSIProcessIndexes with equal priorities in the subframe and, upon determining the second collision, drop CSI reports corresponding to all ServCellIndexes except a CSI report with the lowest ServCellIndex, wherein a CSI report for a specific CSIProcessIndex with a lower ServCellIndex has a higher priority than a CSI report for the specific CSIProcessIndex with a ServCellIndex that is higher than the lower ServCellIndex; and

prepare at least one non-colliding CSI report from among CSI reports that are not dropped;

multiplex a hybrid automatic repeat request-acknowledgement (HARQ-ACK) and the at least one non-colliding CSI report;

determine whether the at least one non-colliding CSI report with HARQ-ACK feedback bits and any scheduling request (SR) fits into a payload of the PUCCH format 3;

transmit the HARQ-ACK feedback bits including any SR without the at least one non-colliding CSI report when the at least one non-colliding CSI report with HARQ-ACK feedback bits and any SR does not fit into the payload; and

transmit the multiplexed HARQ-ACK feedback bits including any SR with the at least one non-colliding CSI report when the at least one non-colliding CSI report with HARQ-ACK feedback bits and any SR fits into the payload.

2. The computer circuitry of claim 1, wherein the PUCCH format includes a PUCCH format 2, 2a, 2b, or 3.

3. The computer circuitry of claim 1,

wherein PUCCH reporting types 3, 5, 6, and 2a have a priority higher than PUCCH reporting types 1, 1a, 2, 2b, 2c, and 4, and PUCCH reporting types 2, 2b, 2c, and 4 have a priority higher than PUCCH reporting types 1 and 1a.

4. The computer circuitry of claim 1, further configured to:

assign a highest priority CSI process to a default CSI process for a serving cell corresponding to a lowest CSIProcessIndex.

5. The computer circuitry of claim 1, wherein the CSIProcessIndex is unique for a specified CSI process and a specified serving cell.

23. The computer circuitry of claim 1, wherein the UE includes at least one of an antenna, a touch sensitive display screen, a speaker, a microphone, a graphics processor, an application processor, internal memory, a non-volatile memory port, and combinations thereof.

6. A wireless device configured for a periodic channel state information (CSI) transmission configured in a specified transmission mode (TM), comprising:

a processing module to;

generate, at the wireless device, a plurality of CSI reports for serving cells in a subframe for a plurality of CSI processes for the wireless device operating in the specified TM used in a coordinated multipoint (CoMP) operation and carrier aggregation (CA) configuration, each of the CSI processes include a respective configuration of a channel and a corresponding interference part, wherein each CSI report corresponds to a physical uplink control channel (PUCCH) reporting type among a plurality of PUCCH reporting types, a CSI process among a plurality of CSI processes having a CSI process index (CSIProcessIndex) and a serving cell index (ServCellIndex) among a plurality of ServCellIndexes;

determine different priorities corresponding to each of the plurality of PUCCH reporting types;

determine a first collision between CSI reports, among the plurality of CSI reports, having PUCCH reporting types with equal priorities in the subframe and, upon determining the first collision, drop CSI reports corresponding to all CSI processes except a CSI process having the lowest CSIProcessIndex, wherein a CSI report for a specific ServCellIndex with a lower CSIProcessIndex has a higher priority than a CSI report for the specific ServCellIndex with a CSIProcessIndex higher than the lower CSIProcessIndex;

determine a second collision between CSI reports, after determining the first collision, among retained ones of the plurality of CSI reports, having CSIProcessIndexes with equal priorities in the subframe and, upon determining the second collision, drop CSI reports corresponding to all ServCellIndexes except a CSI report with the lowest ServCellIndex, wherein a CSI report for a specific CSIProcessIndex with a lower ServCellIndex has a higher priority than a CSI report for the specific CSIProcessIndex with a ServCellIndex that is higher than the lower ServCellIndex;

prepare at least one non-colliding CSI report from among CSI reports that are not dropped;

multiplex a hybrid automatic repeat request-acknowledgement (HARQ-ACK) and the at least one non-colliding CSI report; and

determine whether the at least one non-colliding CSI report with HARQ-ACK feedback bits and any scheduling request (SR) fits into a payload of the PUCCH format 3; and

a transceiver module to;

transmit the HARQ-ACK feedback bits including any SR without the at least one non-colliding CSI report when the at least one non-colliding CSI report with HARQ-ACK feedback bits and any SR does not fit into the payload; and

transmit the multiplexed HARQ-ACK feedback bits including any SR with the at least one non-colliding CSI report when the at least one non-colliding CSI report with HARQ-ACK feedback bits and any SR fits into the payload.

7. The wireless device of claim 6, wherein PUCCH reporting types with rank indication (RI) or wideband precoding matrix indicator (PMI) feedback without channel quality indicator (CQI) feedback have a priority higher than PUCCH reporting types with CQI feedback, and PUCCH reporting types with wideband CQI feedback have a priority higher than PUCCH reporting with sub-band CQI feedback.

8. The wireless device of claim 6, wherein the processing module is further configured to:

prioritize the CSI reports based on the CSI process index, and then prioritize the CSI reports based on the serving cell index.

9. The wireless device of claim 6, wherein the transceiver module is further configured to receive a priority for a CSI report with a specified CSI process index or a specified serving cell index via radio resource control (RRC) signaling.

10. The wireless device of claim 6, wherein the processing module is further configured to:

prioritize the CSI reports based on a combined CSI process index and serving cell index, wherein the CSI report with a lower combined CSI process index and serving cell index has a higher priority than a CSI report with a higher combined CSI process index and serving cell index.

11. The wireless device of claim 6, wherein the processing module is further configured to assign a highest priority CSI process to a default CSI process that has a lowest CSI process index for a plurality of CSI processes.

12. The wireless device of claim 6, wherein the wireless device is selected from the group consisting of a user equipment (UE) and a mobile station (MS), and the wireless device includes at least one of an antenna, a touch sensitive display screen, a speaker, a microphone, a graphics processor, an application processor, internal memory, a non-volatile memory port, and combinations thereof.

13. A method for periodic channel state information (CSI) reporting from a user equipment (UE) in a coordinated multipoint (COMP) scenario, comprising:

generating, at the UE, a plurality of CSI reports for serving cells for transmission in a subframe for a plurality of CSI processes for the UE operating in a specified transmission mode (TM) used in the CoMP scenario and carrier aggregation (CA) configuration, each of the CSI processes include a respective configuration of a channel and a corresponding interference part, wherein each CSI report corresponds to a physical uplink control channel (PUCCH) reporting type among a plurality of PUCCH reporting types, a CSI process among a plurality of CSI processes having a CSI process index, and a serving cell index among a plurality of serving cell indexes;

determining different priorities corresponding to each of the plurality of PUCCH reporting types;

determining a first collision between CSI reports, among the plurality of CSI reports, having PUCCH reporting types with equal priorities in the subframe and, upon determining the first collision, drop CSI reports corresponding to all CSI processes except a CSI process having the lowest CSI process index, wherein a CSI report for a specific serving cell index with a lower CSI process index has a higher priority than a CSI report for the specific serving cell index with a CSI process index higher than the lower CSI process index;

determining a second collision between CSI reports, after determining the first collision, among retained ones of the plurality of CSI reports, having CSI process indexes with equal priorities in the subframe and, upon determining the second collision, drop CSI reports corresponding to all serving cell indexes except a CSI report with the lowest serving cell index, wherein a CSI report for a specific CSI process index with a lower serving cell index has a higher priority than a CSI report for the specific CSI process index with a serving cell index that is higher than the lower serving cell index;

preparing at the UE at least one non-colliding CSI report from among CSI reports that are not dropped;

multiplexing a hybrid automatic repeat request-acknowledgement (HARQ-ACK) and the at least one non-colliding CSI report;

determining whether the at least one non-colliding CSI report with HARQ-ACK feedback bits and any scheduling request (SR) fits into a payload of the PUCCH format 3;

transmitting the HARQ-ACK feedback bits including any SR without the at least one non-colliding CSI report when the at least one non-colliding CSI report with HARQ-ACK feedback bits and any SR does not fit into the payload; and

transmitting the multiplexed HARQ-ACK feedback bits including any SR with the at least one non-colliding CSI report when the at least one non-colliding CSI report with HARQ-ACK feedback bits and any SR fits into the payload.

14. The method of claim 13, wherein

CQI/PMI/RI reporting types 3, 5, 6, and 2a have a priority higher than CQI/PMI/RI reporting types 1, 1a, 2, 2b, 2c, and 4, and CQI/PMI/RI reporting types 2, 2b, 2c, and 4 have a priority higher than CQI/PMI/RI reporting types 1 and 1 a.

15. The method of claim 14, further comprising:

prioritizing the plurality of CSI reports based on the serving cell index or a component carrier (CC), wherein the CC with a higher priority has a lower serving cell index, and then

prioritizing the plurality of CSI reports based on the CSI process index.

16. The method of claim 14, further comprising:

prioritizing the plurality of CSI reports based on the CSI process index, and then

prioritizing the plurality of CSI reports based on the serving cell index or a component carrier (CC), wherein the CC with a higher priority has a lower serving cell index.

17. The method of claim 14, further comprising:

receiving via radio resource control (RRC) signaling a priority for the CSI reports based on the CSI process index or a component carrier (CC) for each CSI report.

18. The method of claim 14, wherein a unique CSI process index is assigned for a specified CSI process and a specified CC.

19. The method of claim 14, further comprising:

defining a default CSI process with a highest priority CSI process, wherein the default CSI process corresponds to a lowest CSI process index.

20. The method of claim 13, wherein transmitting the at least one non-colliding CSI report further comprises:

transmitting the at least one non-colliding CSI report for each at most 11 CSI bits available in a PUCCH format.

21. The method of claim 13, wherein the node is selected from the group consisting of a base station (BS), a Node B (NB), an evolved Node B (eNB), a baseband unit (BBU), a remote radio head (RRH), a remote radio equipment (RRE), a remote radio unit (RRU), and combinations thereof.

22. At least one non-transitory machine readable storage medium comprising a plurality of instructions adapted to be executed to implement the method of claim 13.