Apparatus and method for hybrid automatic repeat request

• US 8,634,353 B2
• Filed: 02/01/2007
• Issued: 01/21/2014
• Est. Priority Date: 02/02/2006
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Teague, Edward Harrison
• Primary Examiner(s): Rinehart, Mark
• Assistant Examiner(s): ONAMUTI, GBEMILEKE J
• Application Number:
  US11/670,370
• Publication Number:
  US 20070211660A1
• Time in Patent Office: 2,546 Days
• Field of Search: 714/748, 714/749, 370/206, 370/473, 370/412, 370/329, 455/436
• US Class Current: 370/329
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04W 72/563 of the wireless resources

Abstract

Systems and methodologies are described that facilitate using both synchronous and asynchronous HARQ assignment schemes. According to various aspects, the system and methods are described for determining if a synchronous HARQ or an asynchronous HARQ assignment scheme should be used for providing a resource assignment and indicating whether the resource assignment is provided using the synchronous HARQ or an asynchronous HARQ assignment scheme.

Claims

1. A method of using Hybrid Automatic Repeat Request (HARQ) assignment in a wireless communication network, comprising:

determining if a synchronous HARQ or an asynchronous HARQ assignment scheme should be used for providing a resource assignment, the synchronous HARQ assignment scheme being used if an assignment overhead is greater than a threshold and the asynchronous HARQ assignment scheme being used if the assignment overhead is less than the threshold; and

transmitting over the wireless communication network an indication of whether the resource assignment is provided using the synchronous HARQ or an asynchronous HARQ assignment scheme.

2. The method of claim 1, wherein transmitting the indication comprises setting an indicator that is signaled to a receiver.

3. The method of claim 2, wherein the setting of the indicator comprises setting an indicator bit to a “

1”

for asynchronous HARQ assignment and setting the indicator bit to a “

0”

for synchronous HARQ assignment.

4. The method of claim 1, further comprising allocating a frequency range for the HARQ assignment, wherein a first frequency range is allocated for synchronous HARQ assignment scheme and a second frequency range is allocated for asynchronous HARQ assignment scheme.

5. The method of claim 4, wherein the transmitting the indication comprises signaling over a broadcast channel the frequency range used for synchronous and asynchronous HARQ assignment scheme.

6. The method of claim 1, wherein transmitting the indication comprises setting a single bit that is signaled to a receiver over a broadcast channel.

7. The method of claim 1, further comprising using the asynchronous HARQ assignment if an assignment overhead is small.

8. The method of claim 1, further comprising using the synchronous HARQ assignment if an assignment overhead is large.

9. The method of claim 1, further comprises using the asynchronous HARQ assignment during a fragment portion of the resource assignment.

10. The method of claim 1, wherein the assignment overhead is a measure of an amount of resources required to communicate an assignment to a user.

11. The method of claim 10, wherein the required resources to communicate the assignment message comprise the number of bits in an assignment message header.

12. An apparatus for using Hybrid Automatic Repeat Request (HARQ) assignment in a wireless communication network, comprising:

means for determining if a synchronous HARQ or an asynchronous HARQ assignment scheme should be used for providing a resource assignment, the synchronous HARQ assignment scheme being used if an assignment overhead is greater than a threshold and the asynchronous HARQ assignment scheme being used if the assignment overhead is less than the threshold; and

means for indicating whether the resource assignment is provided using the synchronous HARQ or an asynchronous HARQ assignment scheme.

13. The apparatus of claim 12, wherein the means for indicating comprises means for setting an indicator that is signaled to a receiver.

14. The apparatus of claim 13, wherein the means for setting of the indicator comprises means for setting an indicator bit to a “

1”

for asynchronous HARQ assignment and means for setting the indicator bit to a “

0”

for synchronous HARQ assignment.

15. The apparatus of claim 12, further comprising allocating a frequency range, wherein a first frequency range is allocated for synchronous HARQ assignment scheme and a second frequency range is allocated for asynchronous HARQ assignment scheme.

16. The apparatus of claim 15, wherein the indicting comprises signaling over a broadcast channel the frequency range used for synchronous and asynchronous HARQ assignment scheme.

17. The apparatus of claim 12, wherein the means for indicating comprises means for setting a single bit that is signaled to a receiver over a broadcast channel.

18. The apparatus of claim 12, further comprising means for using the asynchronous HARQ assignment if an assignment overhead is small.

19. The apparatus of claim 12, further comprising means for using the synchronous HARQ assignment if an assignment overhead is large.

20. The apparatus of claim 12, further comprises using the asynchronous HARQ assignment during a fragment portion of the resource assignment.

21. An apparatus for scheduling Hybrid Automatic Repeat Request (HARQ) assignment in a wireless communication network, comprising:

a scheduler configured to determine if a synchronous HARQ or an asynchronous HARQ assignment scheme should be used for providing a resource assignment, the synchronous HARQ assignment scheme being used if an assignment overhead is greater than a threshold and the asynchronous HARQ assignment scheme being used if the assignment overhead is less than the threshold; and

wherein the scheduler is further configured to indicate whether the resource assignment is provided using the synchronous HARQ or an asynchronous HARQ assignment scheme.

22. The apparatus of claim 21, wherein the scheduler is further configured to set an indicator that is signaled to a receiver.

23. The apparatus of claim 22, wherein the setting of the indicator comprises setting an indicator bit to a “

1”

for asynchronous HARQ assignment and setting the indicator bit to a “

0”

for synchronous HARQ assignment.

24. The apparatus of claim 21, wherein the scheduler is further configured to allocate a frequency range for the HARQ assignment, wherein a first frequency range is allocated for synchronous HARQ assignment scheme and a second frequency range is allocated for asynchronous HARQ assignment scheme.

25. The apparatus of claim 24, wherein the scheduler is further configured to signal over a broadcast channel the frequency range used for synchronous and asynchronous HARQ assignment scheme.

26. The apparatus of claim 21, wherein the scheduler is further configured to set as an indicator a single bit that is signaled to a receiver over a broadcast channel.

27. The apparatus of claim 21, wherein the scheduler is further configured to use the asynchronous HARQ assignment if an assignment overhead is small.

28. The apparatus of claim 21, wherein the scheduler is further configured to use the synchronous HARQ assignment if an assignment overhead is large.

29. The apparatus of claim 21, wherein the scheduler is further configured to use the asynchronous HARQ assignment during a fragment portion of the resource assignment.

30. The apparatus of claim 21, wherein the assignment overhead is a measure of an amount of resources required to communicate an assignment to a user.

31. The apparatus of claim 30, wherein the required resources to communicate the assignment message comprise the number of bits in an assignment message header.

32. A non-transitory computer readable medium having stored thereon computer executable instructions for performing the following acts for Hybrid Automatic Repeat Request (HARQ) assignment in a wireless communication network:

determining if a synchronous HARQ or an asynchronous HARQ assignment scheme should be used for providing a resource assignment, the synchronous HARQ assignment scheme being used if an assignment overhead is greater than a threshold and the asynchronous HARQ assignment scheme being used if the assignment overhead is less than the threshold; and

transmitting an indication of whether the resource assignment is provided using the synchronous HARQ or an asynchronous HARQ assignment scheme.

33. A method of using Hybrid Automatic Repeat Request (HARQ) assignment in a wireless communication network, comprising:

receiving a resource assignment grant transmitted over the wireless communication network; and

determining if the resource assignment uses a synchronous HARQ or an asynchronous HARQ assignment scheme, the synchronous HARQ assignment scheme being used if an assignment overhead is greater than a threshold and the asynchronous HARQ assignment scheme being used if the assignment overhead is less than the threshold.

34. A receiver for using Hybrid Automatic Repeat Request (HARQ) assignment in a wireless communication network, comprising:

a processor configured to receive a resource assignment grant, wherein the processor is configured to determine if the resource assignment grant uses a synchronous HARQ or an asynchronous HARQ assignment scheme, the synchronous HARQ assignment scheme being used if an assignment overhead is greater than a threshold and the asynchronous HARQ assignment scheme being used if the assignment overhead is less than the threshold.

35. The receiver of claim 34, the processor further configured to receive an indicator that is set and signaled to the receiver.

36. The receiver of claim 35, wherein the indicator comprises an indicator bit set to a “

1”

for asynchronous HARQ assignment and the indicator bit set to a “

0”

for synchronous HARQ assignment.

37. The receiver of claim 34, wherein a frequency range for the HARQ assignment includes a first frequency range for the synchronous HARQ assignment scheme and a second frequency range for the asynchronous HARQ assignment scheme.

38. The receiver of claim 37, wherein the processor is further configured to receive over a broadcast channel the frequency range used for synchronous and asynchronous HARQ assignment scheme.

39. The receiver of claim 34, wherein the processor is further configured to receive as an indicator a single bit that is received at the receiver over a broadcast channel.

40. The receiver of claim 34, wherein the assignment overhead is a measure of an amount of resources required to communicate an assignment to a user.

41. The receiver of claim 40, wherein the required resources to communicate the assignment message comprise the number of bits in an assignment message header.