Communicating Channel State Information (CSI) of Multiple Transmission Points

• US 20170238323A1
• Filed: 12/22/2016
• Published: 08/17/2017
• Est. Priority Date: 06/04/2012
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: Marinier, Paul, Pani, Diana, Tooher, J. Patrick, Rudolf, Marian
• Granted Patent: US 11,039,329 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 17/24 with feedback of measurements to the transmitter
• 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 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/0647 Variable feedback rate
• CPC Class Codes: H04B 7/2612 Arrangements for wireless medium access control, e.g. by allocating physical layer transmission capacity H04B7/2615 - H04B7/2643 take precedence; provision for broadband connection H04Q11/0478
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0027 Scheduling of signalling, e.g. occurrence thereof
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/563 of the wireless resources
• CPC Class Codes: H04W 84/02 Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices
• CPC Class Codes: H04W 92/02 Inter-networking arrangements
• CPC Class Codes: H04W 92/10 between terminal device and access point, i.e. wireless air interface

Abstract

Embodiments contemplate methods and systems for determining and communicating channel state information (CSI) for one or more transmission points (or CSI reference signal resources). Embodiments further contemplate determining transmission states may include applying at least one CSI process for channel state information (CSI) reporting. Embodiments also contemplate aperiodic and/or periodic reporting of one or more report types (e.g., rank indicator (RI)) of CSI, perhaps based on one or more reporting modes that may be configured for each of the one or more CSI process.

Claims

1. A wireless transmit/receive unit (WTRU) the WTRU in communication with a serving cell, the WTRU comprising:

a processor, the processor configured at least with;

one or more channel state information (CSI) processes, the processor configured to at least;

receive an indication in a CSI request field, the indication indicating a first set of the one or more CSI processes, the first set of the one or more CSI processes configured via signaling from one or more logical layers higher than a physical layer of the WTRU, and at least one CSI process of the first set of the one or more CSI processes not corresponding to the serving cell;

generate an aperiodic report corresponding to the first set of the one or more CSI processes, the indication in the CSI request field triggering the generation of the report; and

send the report via a physical uplink shared channel (PUSCH).

4. The WTRU of claim 1, wherein the indication is a first indication and the aperiodic report is a first aperiodic report, the processor is further configured to receive a second indication in the CSI request field and generate a second aperiodic report, the second indication indicating a second set of the one or more CSI processes, the second set of the one or more CSI processes configured via signaling from the one or more logical layers higher than the physical layer of the WTRU and at least one CSI process of the second set of the one or more CSI processes not corresponding to the serving cell, the second aperiodic report corresponding to the second set of the one or more CSI processes, and the processor is further configured such that the second indication in the CSI request field triggers the generation of the second aperiodic report.

6. The WTRU of claim 1, wherein the serving cell corresponds to the PUSCH via which the aperiodic report is sent.

23. The WTRU of claim 1, wherein the aperiodic report is determined according to one or more aperiodic report modes configured for each of the first set and second set of the one or more CSI processes.

2. (canceled)

3. (canceled)

5. (canceled)

7-14. -14. (canceled)

15. A wireless transmit/receive unit (WTRU) comprising:

a processor, the processor configured at least with;

one or more channel state information (CSI) processes; and

a rank indicator (RI) associated with a first CSI process of the one or more CSI processes, the RI configurable to be associated with one or more CSI processes in addition to the first CSI process, the processor configured to at least;

associate the RI with at least a second CSI process; and

report a common RI value, the common RI value being the RI associated with the first CSI process and the at least second CSI process.

16. The WTRU of claim 15, wherein the processor is further configured to associate the RI with at least a third CSI process, and the common RI value being the RI associated with the first CSI process, the at least second CSI, and the at least third CSI.

17. A wireless transmit/receive unit (WTRU), the WTRU comprising:

a processor, the processor configured at least with;

one or more channel state information (CSI) processes; and

one or more types of feedback reports corresponding to the one or more CSI processes, the processor configured to;

generate a first periodic report corresponding to a first CSI process of the one or more CSI processes, the first periodic report corresponding to a rank indicator (RI) report type of the one or more report types;

generate a second periodic report corresponding to a second CSI process of the one or more CSI processes, the second periodic report corresponding to the RI report type of the one or more report types; and

drop one of the first periodic report or the second periodic report upon a collision between the first periodic report and the second periodic report, the first periodic report and the second periodic report including an RI value applicable to both the first periodic report and the second periodic report.

18. A wireless transmit/receive unit (WTRU) comprising:

a processor, the processor configured at least with;

one or more channel state information (CSI) processes, the processor configured to at least;

assume at least one of;

a physical downlink shared channel (PDSCH) transmission power for each of the one or more CSI processes, or a different ratio of PDSCH energy per resource element (EPRE) to CSI EPRE for each of the one or more CSI processes.

19. An evolved node-B (eNB), the eNB in communication with a wireless transmit/receive unit (WTRU), the WTRU in communication with a serving cell, the eNB comprising:

a processor, the processor configured to at least;

provide a configuration to the WTRU, the configuration including at least;

one or more channel state information (CSI) processes; and

a CSI request field, an indication associated with the CSI request field indicating at least one of a first set of the one or more CSI processes or a second set of the one or more CSI processes, at least one CSI process of the first set of the one or more CSI processes and the second set of the one or more CSI processes not corresponding to the serving cell; and

receive an aperiodic report corresponding to at least one of the first set of the one or more CSI processes or the second set of the one or more CSI processes from the WTRU via a physical uplink shared channel (PUSCH).

20. (canceled)

21. (canceled)

22. An evolved node-B (eNB) in communication with a wireless transmit/receive unit (WTRU), the eNB comprising:

a processor, the processor configured to at least;

provide the WTRU with a configuration including at least;

one or more channel state information (CSI) processes; and

a rank indicator (RI) associated with a first CSI process of the one or more CSI processes, the RI configurable to be associated with one or more CSI processes in addition to the first CSI process; and

receive a report including a common RI value from the WTRU, the common RI value being the RI associated with a first CSI process and at least a second CSI process.