Method and apparatus for scheduling resources for uplink MIMO communication

• US 8,842,542 B2
• Filed: 02/06/2013
• Issued: 09/23/2014
• Est. Priority Date: 02/08/2012
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Zhang, Danlu, Sambhwani, Sharad Deepak, Bharadwaj, Arjun, Agarwal, Ravi, Akkarakaran, Sony J.
• Primary Examiner(s): Phan, Tri H
• Application Number:
  US13/760,252
• Publication Number:
  US 20130201939A1
• Time in Patent Office: 594 Days
• Field of Search: 370229-240, 370241-252, 370310-350, 370431-442, 370449-450, 370464-482, 375/229, 375260-267, 375/349, 455/13.3, 455 59- 60, 455/112, 455/216, 455303-306, 455/422.1
• US Class Current: 370/236
• CPC Class Codes: H04B 7/0404 the mobile station comprising multiple antennas, e.g. to provide uplink diversity
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04L 1/00 Arrangements for detecting or preventing errors in the information received correcting synchronisation H04L7/00
• CPC Class Codes: H04L 1/0006 by adapting the transmission format
• CPC Class Codes: H04L 1/1867 Arrangements specially adapted for the transmitter end
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0064 Rate requirement of the data, e.g. scalable bandwidth, data priority
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 52/12 Outer and inner loops
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

Apparatus and methods of scheduling one or multiple streams for a user equipment (UE) include receiving a single happy bit for the one or multiple streams, determining a set of scheduling grants for a UE configured to transmit over the one or multiple streams, and transmitting the scheduling grant to the UE.

Claims

1. A method for scheduling a plurality of multiple-input, multiple-output (MIMO) streams for a user equipment (UE), comprising:

receiving a single happy bit for the plurality of MIMO streams, wherein the happy bit is computed based at least in part on one or both of a combined data rate and power of the plurality of MIMO streams;

determining a set of scheduling grants for the UE configured to transmit over the plurality of MIMO streams based at least in part on the single happy bit; and

transmitting the scheduling grant to the UE.

2. The method of claim 1, wherein determining the set of scheduling grants for the UE is based in part on determining whether the set of scheduling grants increases throughput at the UE or at a Node B.

3. The method of claim 2, wherein a primary scheduling grant for a primary stream of the plurality of MIMO streams is higher than a secondary scheduling grant for a secondary stream of the plurality of MIMO streams.

4. The method of claim 1, further comprising controlling rise-over-thermal (RoT) for the plurality of MIMO streams based in part on determining that the UE selects traffic-to-pilot ratios or transport block sizes below a threshold.

5. The method of claim 4, wherein controlling the RoT is performed irrespective of directionality in interference.

6. The method of claim 4, further comprising lowering the scheduling grant and reallocating resulting RoT margin to other UEs.

7. The method of claim 4, wherein the controlling the RoT is based on the RoT as measured after interference suppression or interference cancellation.

8. The method of claim 1, wherein a combined data rate across the plurality of MIMO streams is used to determine the scheduling grant.

9. The method of claim 1, further comprising including a stream identifier in communicating packets received over the plurality of MIMO streams to a radio network controller to facilitate power control using one of the plurality of MIMO streams.

10. The method of claim 1, further comprising implementing NULL detection for one or more control channels related to a secondary stream in the plurality of MIMO streams.

11. An apparatus for scheduling a plurality of multiple-input, multiple-output (MIMO) streams for a user equipment (UE), comprising:

means for receiving a single happy bit for the plurality of MIMO streams, wherein the happy bit is computed based at least in part on one or both of a combined data rate and power of the plurality of MIMO streams;

means for determining a set of scheduling grants for the UE configured to transmit over the plurality of MIMO streams based at least in part on the single happy bit; and

means for transmitting the scheduling grant to the UE.

12. The apparatus of claim 11, wherein the means for determining the set of scheduling grants for the UE is configured to determined based in part on determining whether the set of scheduling grants increases throughput at the UE or at a Node B.

13. The apparatus of claim 12, wherein a primary scheduling grant for a primary stream of the plurality of MIMO streams is higher than a secondary scheduling grant for a secondary stream of the plurality of MIMO streams.

14. The apparatus of claim 11, further comprising:

means for controlling rise-over-thermal (RoT) for the plurality of MIMO streams based in part on determining that the UE selects traffic-to-pilot ratios or transport block sizes below a threshold.

15. The apparatus of claim 14, wherein controlling the RoT is performed irrespective of directionality in interference.

16. The apparatus of claim 14, further comprising:

means for lowering the scheduling grant and reallocating resulting RoT margin to other UEs.

17. The apparatus of claim 14, wherein the controlling the RoT is based on the RoT as measured after interference suppression or interference cancellation.

18. The apparatus of claim 11, wherein a combined data rate across plurality of MIMO streams is used to determine the scheduling grant.

19. The apparatus of claim 11, further comprising:

means for including a stream identifier in communicating packets received over the plurality of MIMO streams to a radio network controller to facilitate power control using one of the plurality of MIMO streams.

20. The apparatus of claim 11, further comprising:

means for implementing NULL detection for one or more control channels related to a secondary stream in the plurality of MIMO streams.

21. A non-transitory computer-readable medium for scheduling a plurality of multiple-input, multiple-output (MIMO) streams for a user equipment (UE), comprising code for causing a computer to:

receive a single happy bit for the plurality of MIMO streams, wherein the happy bit is computed based at least in part on one or both of a combined data rate and power of the plurality of MIMO streams;

determine a set of scheduling grants for the UE configured to transmit over the plurality of MIMO streams based at least in part on the single happy bit; and

transmit the scheduling grant to the UE.

22. The non-transitory computer-readable medium of claim 21, wherein the code to determine the set of scheduling grants for the UE is further configured to determine based in part on determining whether the set of scheduling grants increases throughput at the UE or at a Node B.

23. The non-transitory computer-readable medium of claim 22, wherein a primary scheduling grant for a primary stream of the plurality of MIMO streams is higher than a secondary scheduling grant for a secondary stream of the plurality of MIMO streams.

24. The non-transitory computer-readable medium of claim 21, further comprising code for causing the computer to control rise-over-thermal (RoT) for the plurality of MIMO streams based in part on determining that the UE selects traffic-to-pilot ratios or transport block sizes below a threshold.

25. The non-transitory computer-readable medium of claim 24, wherein controlling the RoT is performed irrespective of directionality in interference.

26. The non-transitory computer-readable medium of claim 24, further comprising code for causing the computer to lower the scheduling grant and reallocating resulting RoT margin to other UEs.

27. The non-transitory computer-readable medium of claim 24, wherein the controlling the RoT is based on the RoT as measured after interference suppression or interference cancellation.

28. The non-transitory computer-readable medium of claim 21, wherein a combined data rate across the plurality of MIMO streams is used to determine the scheduling grant.

29. The non-transitory computer-readable medium of claim 21, further comprising code for causing the computer to include a stream identifier in communicating packets received over the plurality of MIMO streams to a radio network controller to facilitate power control using one of the plurality of MIMO streams.

30. The non-transitory computer-readable medium of claim 21, further comprising code for causing the computer to implement NULL detection for one or more control channels related to a secondary stream in the plurality of MIMO streams.

31. An apparatus for scheduling a plurality of multiple-input, multiple-output (MIMO) streams for a user equipment (UE) comprising:

at least one processor configured to;

receive a single happy bit for the plurality of MIMO streams, wherein the happy bit is computed based at least in part on one or both of a combined data rate and power of the plurality of MIMO streams;

determine a set of scheduling grants for the UE configured to transmit over the plurality of MIMO streams based at least in part on the single happy bit; and

transmit the scheduling grant to the UE; and

a memory coupled to the at least one processor.

32. The apparatus of claim 31, wherein the at least one processor is further configured to determine the set of scheduling grants for the UE based in part on determining whether the set of scheduling grants increases throughput at the UE or at a Node B.

33. The apparatus of claim 32, wherein a primary scheduling grant for a primary stream of the plurality of MIMO streams is higher than a secondary scheduling grant for a secondary stream of the plurality of MIMO streams.

34. The apparatus of claim 31, wherein the at least one processor is further configured to control rise-over-thermal (RoT) for the plurality of MIMO streams based in part on determining that the UE selects traffic-to-pilot ratios or transport block sizes below a threshold.

35. The apparatus of claim 34, wherein controlling the RoT is performed irrespective of directionality in interference.

36. The apparatus of claim 34, wherein the at least one processor is further configured to lower the scheduling grant and reallocating resulting RoT margin to other UEs.

37. The apparatus of claim 34, wherein the controlling the RoT is based on the RoT as measured after interference suppression or interference cancellation.

38. The apparatus of claim 31, wherein the at least one processor is further configured to determine a combined data rate across the plurality of MIMO streams to determine the scheduling grant.

39. The apparatus of claim 31, wherein the at least one processor is further configured to include a stream identifier in communicating packets received over the plurality of MIMO streams to a radio network controller to facilitate power control using one of the plurality of MIMO streams.

40. The apparatus of claim 31, wherein the at least one processor is further configured to implement NULL detection for one or more control channels related to a secondary stream in the plurality of MIMO streams.