Downlink Control Channel for Relay Resource Allocation

• US 20110164550A1
• Filed: 07/02/2010
• Published: 07/07/2011
• Est. Priority Date: 07/06/2009
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Gorokhov, Alexei Yurievitch, Bhushan, Naga, Montojo, Juan, Chen, Wanshi, Khandekar, Aamod Dinkar
• Granted Patent: US 8,861,424 B2
• Time in Patent Office: Days
• US Class Current: 370/315
• CPC Class Codes: H04B 7/15 Active relay systems
• CPC Class Codes: H04B 7/15542 Selecting at relay station its transmit and receive resources selection of wireless resources by user or terminal H04W72/02; arrangements affording multiple use of the transmission path by two-dimensional division of the resources H04L5/0003, or by allocating sub-channels H04L5/003
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 84/047 using dedicated repeater stations
• CPC Class Codes: H04W 92/20 between access points

Abstract

Certain aspects of the present disclosure provide a method for wireless communications. The method generally includes allocating resources of a backhaul link between a donor base station and a relay base station to the relay station for communicating with the donor base station and transmitting a control channel indicating the allocated resources to the relay base station, wherein the control channel is transmitted on a subset of physical resource blocks (PRBs) of subframes assigned for downlink communications on the backhaul link.

Claims

1. A method for wireless communications, comprising:

allocating resources of a backhaul link between a donor base station and a relay base station to the relay station for communicating with the donor base station; and

transmitting a control channel indicating the allocated resources to the relay base station, wherein the control channel is transmitted on a subset of physical resource blocks (PRBs) of subframes assigned for downlink communications on the backhaul link.

2. The method of claim 1, wherein the control channel is transmitted on PRBs that are contiguous in frequency and do not hop in time within a subframe.

3. The method of claim 1, wherein a location of the control channel is centered around resource blocks that are not used in distributed resource allocation of resource blocks for a physical shared data channel of a UE.

4. The method of claim 1, wherein a size of the control channel is aligned with a bandwidth-dependent resource block group (RBG) size.

5. The method of claim 1, wherein the control channel is transmitted on PRBs that are non-contiguous in frequency and do not hop in time within a subframe.

6. The method of claim 5, wherein a gap in the non-contiguous PRBs is aligned with a defined gap in resource blocks defined for a physical shared data channel of a UE.

7. The method of claim 5, wherein a size of the control channel has a granularity of N RBs, wherein N is independent of system bandwidth.

8. The method of claim 1, wherein the control channel is transmitted on PRBs that are non-contiguous in frequency and hop in time within a subframe.

9. The method of claim 8, wherein:

a size of the control channel has a granularity of N RBs, wherein N is a fraction of a bandwidth-dependent resource block group (RBG) size; and

one or more RBs of the control channel are transmitted with one or more RBs of a physical shared data channel of a UE within the same RBG.

10. The method of claim 1, further comprising transmitting a set of bits indicating locations of the PRBs.

11. A method for wireless communications, comprising:

receiving a control channel indicating allocated resources of a backhaul link between a donor base station and a relay base station to the relay station for communicating with the donor base station, wherein the control channel is transmitted on a subset of physical resource blocks (PRBs) of subframes assigned for downlink communications on the backhaul link; and

communicating with the donor base station over the backhaul link using the allocated resources.

12. The method of claim 11, wherein the control channel is transmitted on PRBs that are contiguous in frequency and do not hop in time within a subframe.

13. The method of claim 11, wherein a location of the control channel is centered around resource blocks that are not used in distributed resource allocation of resource blocks for a physical shared data channel of a UE.

14. The method of claim 11, wherein a size of the control channel is aligned with a bandwidth-dependent resource block group (RBG) size.

15. The method of claim 11, wherein the control channel is transmitted on PRBs that are non-contiguous in frequency and do not hop in time within a subframe.

16. The method of claim 15, wherein a gap in the non-contiguous PRBs is aligned with a defined gap in resource blocks defined for a physical shared data channel of a UE.

17. The method of claim 15, wherein a size of the control channel has a granularity of N RBs, wherein N is independent of system bandwidth.

18. The method of claim 11, wherein the control channel is transmitted on PRBs that are non-contiguous in frequency and hop in time within a subframe.

19. The method of claim 18, wherein:

a size of the control channel has a granularity of NRBs, wherein N is a fraction of a bandwidth-dependent resource block group (RBG) size; and

one or more RBs of the control channel are transmitted with one or more RBs of a physical shared data channel of a UE within the same RBG.

20. The method of claim 11, further comprising receiving a set of bits indicating locations of the PRBs.

21. An apparatus for wireless communications, comprising:

means for allocating resources of a backhaul link between a donor base station and a relay base station to the relay station for communicating with the donor base station; and

means for transmitting a control channel indicating the allocated resources to the relay base station, wherein the control channel is transmitted on a subset of physical resource blocks (PRBs) of subframes assigned for downlink communications on the backhaul link.

22. The apparatus of claim 21, wherein the control channel is transmitted on PRBs that are contiguous in frequency and do not hop in time within a subframe.

23. The apparatus of claim 21, wherein a location of the control channel is centered around resource blocks that are not used in distributed resource allocation of resource blocks for a physical shared data channel of a UE.

24. The apparatus of claim 21, wherein a size of the control channel is aligned with a bandwidth-dependent resource block group (RBG) size.

25. The apparatus of claim 21, wherein the control channel is transmitted on PRBs that are non-contiguous in frequency and do not hop in time within a subframe.

26. The apparatus of claim 25, wherein a gap in the non-contiguous PRBs is aligned with a defined gap in resource blocks defined for a physical shared data channel of a UE.

27. The apparatus of claim 25, wherein a size of the control channel has a granularity of N RBs, wherein Nis independent of system bandwidth.

28. The apparatus of claim 21, wherein the control channel is transmitted on PRBs that are non-contiguous in frequency and hop in time within a subframe.

29. The apparatus of claim 28, wherein:

a size of the control channel has a granularity of N RBs, wherein N is a fraction of a bandwidth-dependent resource block group (RBG) size; and

one or more RBs of the control channel are transmitted with one or more RBs of a physical shared data channel of a UE within the same RBG.

30. The apparatus of claim 21, further comprising means for transmitting a set of bits indicating locations of the PRBs.

31. The apparatus for wireless communications, comprising:

means for receiving a control channel indicating allocated resources of a backhaul link between a donor base station and a relay base station to the relay station for communicating with the donor base station, wherein the control channel is transmitted on a subset of physical resource blocks (PRBs) of subframes assigned for downlink communications on the backhaul link; and

means for communicating with the donor base station over the backhaul link using the allocated resources.

32. The apparatus of claim 31, wherein the control channel is transmitted on PRBs that are contiguous in frequency and do not hop in time within a subframe.

33. The apparatus of claim 31, wherein a location of the control channel is centered around resource blocks that are not used in distributed resource allocation of resource blocks for a physical shared data channel of a UE.

34. The apparatus of claim 31, wherein a size of the control channel is aligned with a bandwidth-dependent resource block group (RBG) size.

35. The apparatus of claim 31, wherein the control channel is transmitted on PRBs that are non-contiguous in frequency and do not hop in time within a subframe.

36. The apparatus of claim 35, wherein a gap in the non-contiguous PRBs is aligned with a defined gap in resource blocks defined for a physical shared data channel of a UE.

37. The apparatus of claim 35, wherein a size of the control channel has a granularity of N RBs, wherein Nis independent of system bandwidth.

38. The apparatus of claim 31, wherein the control channel is transmitted on PRBs that are non-contiguous in frequency and hop in time within a subframe.

39. The apparatus of claim 38, wherein:

a size of the control channel has a granularity of N RBs, wherein N is a fraction of a bandwidth-dependent resource block group (RBG) size; and

one or more RBs of the control channel are transmitted with one or more RBs of a physical shared data channel of a UE within the same RBG.

40. The apparatus of claim 31, further comprising means for receiving a set of bits indicating locations of the PRBs.

41. An apparatus for wireless communications, comprising:

at least one processor configured to

allocate resources of a backhaul link between a donor base station and a relay base station to the relay station for communicating with the donor base station, and

transmit a control channel indicating the allocated resources to the relay base station, wherein the control channel is transmitted on a subset of physical resource blocks (PRBs) of subframes assigned for downlink communications on the backhaul link; and

a memory coupled with the at least one processor.

42. An apparatus for wireless communications, comprising:

at least one processor configured to

receive a control channel indicating allocated resources of a backhaul link between a donor base station and a relay base station to the relay station for communicating with the donor base station, wherein the control channel is transmitted on a subset of physical resource blocks (PRBs) of subframes assigned for downlink communications on the backhaul link, and

communicate with the donor base station over the backhaul link using the allocated resources; and

a memory coupled with the at least one processor.

43. A computer-program product for wireless communications, the computer-program product comprising a computer-readable medium comprising code for:

allocating resources of a backhaul link between a donor base station and a relay base station to the relay station for communicating with the donor base station; and

transmitting a control channel indicating the allocated resources to the relay base station, wherein the control channel is transmitted on a subset of physical resource blocks (PRBs) of subframes assigned for downlink communications on the backhaul link.

44. A computer-program product for wireless communications, the computer-program product comprising a computer-readable medium comprising code for:

receiving a control channel indicating allocated resources of a backhaul link between a donor base station and a relay base station to the relay station for communicating with the donor base station, wherein the control channel is transmitted on a subset of physical resource blocks (PRBs) of subframes assigned for downlink communications on the backhaul link; and

communicating with the donor base station over the backhaul link using the allocated resources.