SYNCHRONOUS ADAPTIVE HARQ

• US 20080253326A1
• Filed: 04/11/2008
• Published: 10/16/2008
• Est. Priority Date: 04/13/2007
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Damnjanovic, Aleksandar
• Application Number:
  US12/101,432
• Publication Number:
  US 20080253326A1
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/0006 by adapting the transmission format
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/1614 using bitmaps
• 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]

Abstract

Synchronous adaptive HARQ is utilized to mitigate resource fragmentation. Bitmaps are utilized instead of scheduling uplink grants for retransmission. The location of one or more resource blocks can be changed if there is a release of resources in a location of a corresponding resource block. Changing the location of the one or more resource blocks can group the resource blocks toward a first end of a spectrum. The bitmap can include a retransmission offset and a signal that indicates a direction with respect to the retransmission offset. The direction can be a positive direction or a negative direction.

Claims

1. A method for mitigating resource fragmentation, comprising:

deciding if a position of at least one resource block should be changed for an uplink transmission;

assigning the at least one resource block to a changed position;

creating a bitmap to indicate the changed position; and

transmitting the bitmap in place of an uplink grant.

2. The method of claim 1, wherein assigning the at least one resource block to the changed position comprises compacting assigned resources included in the uplink transmission.

3. The method of claim 1, wherein assigning the at least one resource block to the changed position comprises grouping assigned resources toward a first end of a spectrum.

4. The method of claim 1, further comprising:

including a bit in the bitmap that indicates a direction in which the position of the at least one resource block was changed, the direction is a positive direction or a negative direction.

5. The method of claim 1, deciding if the position of the at least one resource block should be changed for the uplink transmission, comprising:

determining if there is a release of resources in a location of a corresponding resource block; and

changing the position of the least one resource block if the determination is that there is a release of resources.

6. The method of claim 5, the release of resources is indicated by a “

0”

, wherein the “

0”

indicates a positive acknowledgement.

7. The method of claim 1, deciding if the position of the at least one resource block should be changed for the uplink transmission, comprising:

determining if there is a release of resources in a location of a corresponding resource block; and

retaining the position;

of the least one resource block if the determination is that there is no release of resources.

8. The method of claim 7, wherein retaining the position is indicated by a “

1”

, wherein the “

1”

indicates a negative acknowledgement.

9. The method of claim 1, further comprising:

transmitting no bitmap if it is decided that the position of the least one resource block should not be changed for the uplink transmission, wherein no bitmap indicates termination of HARQ retransmissions.

10. The method of claim 1, deciding if the position of the at least one resource block should be changed for the uplink transmission, comprising:

determining if a location of a corresponding resource block includes a “

0”

or a “

1”

, wherein the “

0”

indicates termination of HARQ retransmissions on the corresponding resource block and the “

1”

indicates continuing HARQ retransmissions on the corresponding resource block.

11. The method of claim 10, further comprising indicating in an uplink grant whether new data is to be transmitted or whether existing data should be transmitted in a different format if there is a termination of HARQ retransmissions, wherein the indication in the uplink grant is included in a New Data Indicator bit.

12. A wireless communications apparatus, comprising:

a memory that retains instructions related to determining whether a location of one or more resource blocks should be changed, assigning the one or more resource blocks to a changed location, creating a bitmap that provides information relating to the changed location, and conveying the bitmap to one or more access terminals; and

a processor, coupled to the memory, configured to execute the instructions retained in the memory.

13. The wireless communication apparatus of claim 12, the memory further retains instructions related to including within the bitmap a signal that indicates a direction of the changed location, wherein the direction is a positive direction or a negative direction.

14. The wireless communication apparatus of claim 12, wherein assigning the one or more resource blocks to a changed location comprises grouping the one or more resource blocks toward a first end of a spectrum.

15. The wireless communication apparatus of claim 12, the memory further retains instructions related to determining if there is a release of resources in a location of a corresponding resource block, changing the location of the one or more resource blocks if there is a release of resources, and not changing the location of the one or more resource blocks if there is no release of resources.

16. The wireless communication apparatus of claim 15, wherein a release of resources is indicated by a “

0” and

no release of resources is indicated by a “

1”

.

17. The wireless communication apparatus of claim 12, the memory further retains instructions related to determing if a location of a corresponding resource block includes a “

0”

or a “

1”

, wherein the “

0”

indicates termination of HARQ retransmission on the corresponding resource block and a “

1”

indicates continuing HARQ retransmissions on the corresponding resource block.

18. A wireless communication apparatus that implements synchronous adaptive. HARQ, comprising:

means for ascertaining a position of a first resource block;

means for evaluating whether there is a release of resources for at least a second resource block;

means for changing the position of the first resource block if there is a release of resources; and

means for conveying a bitmap that includes the changed position to one or more access terminals.

19. The wireless communications apparatus of claim 18, wherein a “

0”

included in a location of the second resource block indicates a release of resources and a “

1”

included in the location of the second resource block indicates no release of resources.

20. The wireless communications apparatus of claim 19, wherein the release of resources indicates termination of HARQ retransmission and no release of resources indicates continuing HARQ retransmissions.

21. The wireless communications apparatus of claim 18, further comprising means for creating the bitmap, wherein the bitmap includes a retransmission offset and a signal that indicates a direction of the retransmission offset.

22. The wireless communications apparatus of claim 18, further comprising means for indicating whether new data is to be transmitted or whether existing data should be transmitted in a different format if there is a release of resources, wherein the indication is a New Data Indicator bit included in an uplink grant.

23. A computer program product, comprising:

a computer-readable medium comprising;

code for synchronous adaptive HARQ, comprising;

code for deciding whether there is a release of resources in a location of at least one resource block;

code for reassigning at least a second resource block to the location if there is a release of resources;

code for creating a bitmap that comprises the reassignment; and

code for conveying the bitmap to at least one access terminal.

24. The computer program product of claim 23, wherein the bitmap includes a retransmission offset and a signal that indicates a direction with respect to the retransmission offset, wherein the direction is a positive direction or a negative direction.

25. In a wireless communications system, an apparatus comprising:

a processor configured to;

decide if a position of at least one resource block should be changed for an uplink transmission;

assign the at least one resource block to a changed position;

create a bitmap to indicate the changed position, wherein the changed position is indicated by a retransmission offset and a signaling bit; and

transmit the bitmap in place of an uplink grant.

26. A method for mitigating resource fragmentation on an uplink, comprising:

determining if the bitmap is received in place of an uplink grant;

evaluating the bitmap for a changed position of at least one resource block; and

transmitting the at least one resource block at the changed position.

27. The method of claim 26, further comprising:

receiving an uplink grant if a bitmap was not received;

evaluating the uplink grant for a New Data Indicator bit; and

transmitting a first set of data or a second set of data based on information included in the New Data Indicator bit, wherein the first set of data is previously transmitted data and the second set of data is new data.

28. The method of claim 26, wherein the bitmap indicates continuation of HARQ resources or termination of HARQ resources.

29. The method of claim 26, wherein evaluating the bitmap includes reviewing a bit in the bitmap, wherein the bit indicates a direction of the changed position, the direction is a positive direction or a negative direction.

30. The method of claim 26, wherein the changed position groups assigned resources toward a first end of a spectrum.

31. The method of claim 26, transmitting the at least one resource block at the changed position further comprising:

placing a “

0”

or a “

1”

in the at least one resource blocks wherein the “

0”

indicates a release of resources and the “

1”

indicates no release of resources.

32. The method of claim 31, wherein the “

0”

indicates a positive acknowledgement and the “

1”

indicates a negative acknowledgement.

33. A wireless communications apparatus, comprising:

a memory that retains instructions related to determining if a bitmap is received in place of an uplink grant, evaluating the bitmap for a changed position of at least one resource block, and transmitting the at least one resource block at the changed position; and

a processor, coupled to the memory, configured to execute the instructions retained in the memory.

34. The wireless communications apparatus of claim 33, the memory further retains instructions related to receiving an uplink grant if the bitmap was not received, evaluating the uplink grant for a New Data Indicator bit, and transmitting a first set of data or a second set of data based on information included in the New Data Indicator bit, wherein the first set of data is previously transmitted data and the second set of data is new data.

35. The wireless communications apparatus of claim 33, wherein the bitmap indicates continuation of HARQ resources or termination of HARQ resources.

36. The wireless communications apparatus of claim 33, wherein evaluating the bitmap includes reviewing a bit in the bitmap, wherein the bit indicates a direction in which the position of the at least one resource block was changed, the direction is a positive direction or a negative direction.

37. The wireless communications apparatus of claim 33, wherein the changed position groups assigned resources toward a first end of a spectrum.

38. The wireless communications apparatus of claim 33, the memory further retains instructions related to placing a “

0”

or a “

1”

in the at least one resource block, wherein the “

0”

indicates a release of resources and the “

1”

indicates no release of resources.

39. The wireless communications apparatus of claim 38, wherein the “

0”

indicates a positive acknowledgement and the “

1”

indicates a negative acknowledgement.

40. A wireless communication apparatus that mitigates resource fragmentation on an uplink, comprising:

means for determining if a bitmap is received in place of an uplink grant;

means for evaluating the bitmap for a changed position of at least one resource block; and

means for transmitting the at least one resource block at the changed position.

41. The wireless communications apparatus of claim 40, wherein the means for determining receives an uplink grant, the means for evaluating reviews the uplink grant for a New Data Indicator bit, and the means for transmitting sends a first set of data or a second set of data based on information included in the New Data Indicator bit, wherein the first set of data is previously transmitted data and the second set of data is new data.

42. The wireless communications apparatus of claim 40, wherein the bitmap indicates continuation of HARQ resources or termination, of HARQ resources.

43. The wireless communications apparatus of claim 40, wherein the means for evaluating reviews a bit in die bitmap, wherein the bit indicates a direction in which the position of the at least one resource block was changed, the direction is a positive direction or a negative direction.

44. The wireless communications apparatus of claim 40, wherein the changed position groups assigned resources toward a first end of a spectrum.

45. The wireless communications apparatus of claim 40, further comprising:

means for placing a “

0”

or a “

1”

in the at least one resource block, wherein the “

0”

indicates a release of resources and the “

1”

indicates no release of resources.

46. The wireless communications apparatus of claim 45, wherein the “

0”

indicates a positive acknowledgement and the “

1”

indicates a negative acknowledgement.

47. A computer program product, comprising;

a computer-readable medium comprising;

code for synchronous adaptive HARQ, comprising;

code for determining if a bitmap is received in place of an uplink grant;

code for evaluating the bitmap for a changed position of at least one resource block; and

code for transmitting the at least one resource block at the changed position.

48. The computer program product of claim 47, further comprising:

code for determining if an uplink grant is received after an indication of termination of HARQ retransmissions;

code for evaluating the uplink grant for a New Data Indicator bit, and

code for transmitting a first set of data or a second set of data based on information included in the New Data Indicator bit, wherein the first set of data is previously transmitted data and the second set of data is new data.

49. In a wireless communications system, an apparatus comprising:

a processor configured to;

decide if a bitmap is received in place of an uplink grant;

evaluate the bitmap for a changed position of at least one resource block;

place a “

0”

or a “

1”

in the at least one resource block, wherein the “

0”

indicates a release of resources and the “

1”

indicates no release of resources; and

transmit the at least one resource block at the changed position.

50. A method, comprising:

receiving a resource block that includes at least one assigned resource that is set to “

1”

; and

interpreting the “

1”

as continuing HARQ retransmission, otherwise there is a termination of HARQ retransmission;

.

51. The method of claim 50, further comprising:

receiving an uplink grant that includes a New Data Indicator (NDI) bit;

determining whether the NDI bit is set or is not set;

transmitting a current set of data on a different resource if the NDI bit is not set; and

transmitting a new set of data if the NDI bit is set.