Method and apparatus for transmitting control signaling for MIMO transmission

• US 8,908,790 B2
• Filed: 12/11/2012
• Issued: 12/09/2014
• Est. Priority Date: 02/16/2007
• Status: Active Grant

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Pan, Kyle Jung-Lin, Zhang, Guodong
• Primary Examiner(s): Tran, Khanh C
• Application Number:
  US13/710,699
• Publication Number:
  US 20130100905A1
• Time in Patent Office: 728 Days
• Field of Search: 375/267, 375/316, 375/340, 375/342, 375/346, 370328-329, 370/334, 370/350
• US Class Current: 375/267
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0064 Rate requirement of the data, e.g. scalable bandwidth, data priority
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A method and apparatus for processing multiple-input multiple-output (MIMO) transmission are disclosed. A wireless transmit/receive unit (WTRU) receives downlink control information including WTRU-specific MIMO and transport format information and MIMO information for all other WTRUs assigned to the same resource. The WTRU processes received MIMO data based on the downlink control information. The downlink control information may also include transport format information for all other WTRUs assigned to the same RB. The downlink control information may be transmitted via WTRU-specific control signaling. All WTRUs'"'"' MIMO and/or transport format information may be transmitted via resource-specific common control signaling. The downlink control signaling format may include at least one of a number of streams for the WTRU, a number of active WTRUs assigned to the same resource, a spatial channel identity for the WTRU, a MIMO mode, a precoding matrix index and a precoding vector index.

Claims

1. A method for processing multi-user multiple-input multiple-output (MU-MIMO) transmission associated with one wireless transmit/receive unit (WTRU) of a plurality of WTRUs that are assignable to a same resource, the method comprising:

receiving, by the one WTRU, downlink control information and MIMO data specific to the one WTRU, the downlink control information including a first indicator indicating information specific to the one WTRU and a second indicator indicating information common to the plurality of WTRUs assignable to the same resource; and

processing, by the one WTRU, the MIMO data specific to the one WTRU based on the downlink control information,

wherein the downlink control information indicates a number of layers associated with the MIMO data.

2. The method of claim 1, wherein:

the information specific to the one WTRU is MIMO information; and

the information common to the plurality of WTRUs assignable to the same resource is MIMO information.

3. The method of claim 1 wherein the downlink control information includes transport format information for the one WTRU.

4. The method of claim 3 wherein the downlink control information further includes transport format information for other WTRUs assigned to the same resource.

5. A wireless transmit/receive unit (WTRU) for processing multi-user multiple-input multiple-output (MU-MIMO) transmission associated with a plurality of WTRUs including the WTRU that are assignable to a same resource, the WTRU comprising:

a receiver for receiving downlink control information and MIMO data specific to the one WTRU, the downlink control information including a first indicator indicating information specific to the WTRU, and a second indicator indicating information common to the plurality of WTRUs assignable to the same resource; and

a processor for processing the MIMO data specific to the WTRU based on the downlink control information,

wherein the processor decodes the downlink control information indicating a number of layers associated with the MIMO data.

6. The WTRU of claim 5, wherein:

the processor includes a MIMO decoder;

the information specific to the WTRU is MIMO information; and

the information common to the plurality of WTRUs assignable to the same resource is MIMO information.

7. The WTRU of claim 5, wherein the processor decodes the downlink control information that includes transport format information for the WTRU.

8. The WTRU of claim 7, wherein the downlink control information further includes transport format information for other WTRUs assigned to the same resource.

9. A method for processing multi-user multiple-input multiple-output (MU-MIMO) transmission associated with one wireless transmit/receive unit (WTRU) of a plurality of WTRUs that are assignable to a same resource, the method comprising:

receiving downlink control information and MIMO data specific to the one WTRU, the downlink control information including an indicator that indicates information for processing the MIMO data specific to the one WTRU, exclusive of MIMO data of any other WTRU assignable to the same resource; and

processing the MIMO data specific to the one WTRU based on the downlink control information,

wherein the downlink control information indicates a number of layers associated with the MIMO data.

10. The method of claim 9, wherein the information for processing the MIMO data specific to the WTRU is MIMO information.

11. The method of claim 9, wherein the downlink control information includes transport format information for the one WTRU.

12. The method of claim 11, wherein the downlink control information further includes transport format information for other WTRUs assigned to the same resource.

13. A wireless transmit/receive unit (WTRU) for processing multi-user multiple-input multiple-output (MU-MIMO) transmission associated with a plurality of WTRUs including the WTRU that are assignable to a same resource, the WTRU comprising:

a receiver for receiving downlink control information and MIMO data specific to the WTRU, the downlink control information including an indicator that indicates information for processing the MIMO data specific to the WTRU, exclusive of MIMO data of any other WTRU assignable to the same resource; and

a processor for processing the MIMO data specific to the WTRU based on the downlink control information,

wherein the processor decodes the downlink control information indicating a number of layers associated with the MIMO data.

14. The WTRU of claim 13, wherein:

the processor includes a MIMO decoder; and

the information for processing the MIMO data is MIMO information.

15. The WTRU of claim 13 wherein the processor decodes the downlink control information that includes transport format information for the WTRU.

16. The WTRU of claim 15 wherein the downlink control information further includes transport format information for other WTRUs assigned to the same resource.

17. An access point (AP) for supporting multi-user multiple-input multiple-output (MU-MIMO) transmission, the AP comprising:

a controller configured to generate downlink control information and MIMO data specific to a first WTRU, the downlink control information including a first indicator indicating information specific to the first WTRU and a second indicator indicating information common to a plurality of WTRUs including the first WTRU that are assignable to the same resource; and

a transmitter configured to transmit the downlink control information and the MIMO data specific to the first WTRU,

wherein the downlink control information indicates a number of layers associated with the MIMO data.

18. The AP of claim 17, wherein the controller is configured to encode the MIMO data.

19. The AP of claim 17, wherein the controller is configured to encode the downlink control information that includes transport format information for the WTRU.

20. The AP of claim 19, wherein the controller is configured to encode transport format information for other WTRUs assigned to the same resource.