Systems, methods and apparatus for retransmitting protocol data units in wireless communications

• US 8,873,535 B2
• Filed: 06/29/2012
• Issued: 10/28/2014
• Est. Priority Date: 09/26/2011
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Arulprakasam, Rajasekar, Kanamarlapudi, Sitaramanjaneyulu
• Primary Examiner(s): Rutkowski, Jeffrey M
• Assistant Examiner(s): Ohri, Romani
• Application Number:
  US13/539,190
• Publication Number:
  US 20130077616A1
• Time in Patent Office: 851 Days
• Field of Search: 370/236, 370/312, 370/346, 370/449, 370/394, 455/39, 455/502, 714748-749
• US Class Current: 370/346
• CPC Class Codes: H04L 1/1685 the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
• CPC Class Codes: H04L 1/1867 Arrangements specially adapted for the transmitter end
• CPC Class Codes: H04L 1/188 Time-out mechanisms
• CPC Class Codes: H04L 1/1896 ARQ related signaling

Abstract

Systems, devices, and methods for retransmitting protocol data units in wireless communication are provided. In one aspect, a device configured to communicate via a wireless communication link includes a processor. The processor is configured to transmit a plurality of protocol data units (PDUs) to a receiving device, select a first PDU from a set of PDUs that has not been acknowledged by the receiving device, retransmit the first selected PDU with a first poll indicator, select a second PDU from the set, and retransmit the second selected PDU with a second poll indicator. The second PDU is different than the first PDU. In some aspects, the PDUs are selected based on the PDUs'"'"' original transmission time. In other aspects, the PDUs may be selected based on the PDU'"'"'s most recent transmission time.

Claims

1. A device configured to communicate via a wireless communication link, the device comprising a processor, configured to:

transmit a plurality of protocol data units (PDUs) to a receiving device,

order a set of PDUs that have not been acknowledged by the receiving device,

select a first PDU from the set based on the ordered set and a PDU index, the PDU index being a number assigned to the PDUs that have not been acknowledged by the receiving device,

retransmit the first selected PDU with a first poll indicator,

alter the PDU index to an altered PDU index,

select a second PDU from the set, based on the ordered set and the altered PDU index, wherein the second PDU is different than the first PDU, and

retransmit the second selected PDU with a second poll indicator.

2. The device of claim 1, wherein the PDUs are selected based on the PDUs'"'"' original transmission time.

3. The device of claim 1, wherein the PDUs are selected based on the PDUs'"'"' most recent transmission time.

4. The device of claim 1, wherein the unacknowledged PDUs are ordered from least recent transmission time to most recent transmission time, and altering the PDU index comprises incrementing the PDU index.

5. The device of claim 1, wherein the unacknowledged PDUs are ordered from most recent transmission time to least recent transmission time, and altering the PDU index comprises decrementing the PDU index.

6. The device of claim 1, wherein the unacknowledged PDUs are randomly ordered.

7. The device of claim 1, wherein the selecting is in response to the expiration of a timer.

8. The device of claim 1, wherein the retransmitting is in response to the expiration of a timer.

9. The device of claim 1, wherein the processor is further configured to transmit a second plurality of PDUs to the receiving device, and add the second plurality of PDUs to the set of PDUs that has not been acknowledged by the receiving device.

10. The device of claim 1, wherein at least one of the first and second poll indicators comprises a bit in a packet header field.

11. The device of claim 1, wherein the wireless communication link comprises a universal mobile telecommunication system.

12. The device of claim 1, wherein the wireless communication link comprises a 3G system.

13. A method of wireless communication, comprising:

transmitting a plurality of PDUs to a receiving device;

ordering a set of PDUs that have not been acknowledged by the receiving device;

selecting a first PDU from the set based on the ordered set and a PDU index, the PDU index being a number assigned to the PDUs that have not been acknowledged by the receiving device;

retransmitting the first selected PDU with a first poll indicator;

altering the PDU index to an altered PDU index;

selecting a second PDU from the set, based on the ordered set and the altered PDU index, wherein the second PDU is different than the first PDU; and

retransmitting the second selected PDU with a second poll indicator.

14. The method of claim 13, wherein the PDUs are selected based on the PDUs'"'"' original transmission time.

15. The method of claim 13, wherein the PDUs are selected based on the PDUs'"'"' most recent transmission time.

16. The method of claim 13, wherein the set of PDUs is ordered from most recently transmitted to least recently transmitted, and altering the PDU index comprises incrementing the PDU index.

17. The method of claim 13, wherein the set of PDUs is ordered from least recently transmitted to most recently transmitted, and altering the PDU index comprises decrementing the PDU index the PDU index.

18. The method of claim 13, wherein the set of PDUs is randomly ordered.

19. The method of claim 13, wherein the set of PDUs is ordered based on the PDU'"'"'s original transmission time.

20. The method of claim 13, wherein the selecting is in response to the expiration of a timer.

21. The method of claim 13, wherein the retransmitting is in response to the expiration of a timer.

22. The method of claim 13, further comprising:

transmitting a second plurality of PDUs to the receiving device; and

adding the second plurality of PDUs to the set of PDUs that have not been acknowledged by the receiving device.

23. The method of claim 13, wherein at least one of the first and second poll indicators comprises a bit in a packet header field.

24. A device configured to communicate via a wireless communication link, the device comprising:

means for transmitting a plurality of PDUs to a receiving device;

means for ordering a set of PDUs that have not been acknowledged by the receiving device;

means for selecting a first PDU from the set based on the ordered set and a PDU index, the PDU index being a number assigned to the PDUs that have not been acknowledged by the receiving device;

means for retransmitting the first selected PDU with a first poll indicator;

means for altering the PDU index to an altered PDU index;

means for selecting a second PDU from the set, based on the ordered set and the altered PDU index, wherein the second PDU is different than the first PDU; and

means for retransmitting the second selected PDU with a second poll indicator.

25. The device of claim 24, wherein the means for selecting are configured to select the PDUs based on the PDU'"'"'s original transmission times.

26. The device of claim 24, wherein the means for selecting are configured to select the PDUs based on the PDU'"'"'s most recent transmission times.

27. The device of claim 24, wherein the ordered list of unacknowledged PDUs is ordered from least recently transmitted to most recently transmitted, and altering the PDU index comprises incrementing the PDU index.

28. The device of claim 24, wherein the ordered list of unacknowledged PDUs is ordered from most recently transmitted to least recently transmitted, and altering the PDU index comprises decrementing the PDU index.

29. The device of claim 24, wherein the means for selecting is configured to select a PDU in response to the expiration of a timer.

30. The device of claim 24, wherein the means for retransmitting is configured to retransmit a PDU in response to the expiration of a timer.

31. A non-transitory computer readable storage medium comprising instructions that, when executed by a processor of an apparatus, cause the apparatus to:

transmit a plurality of PDUs to a receiving device;

order a set of PDUs that have not been acknowledged by the receiving device

select a first PDU from the set based on the ordered set and a PDU index, the PDU index being a number assigned to the PDUs that have not been acknowledged by the receiving device;

retransmit the first selected PDU with a first poll indicator;

alter the PDU index to an altered PDU index;

select a second PDU from the set, based on the ordered set and the altered PDU index, wherein the second PDU is different than the first PDU; and

retransmit the second selected PDU with a second poll indicator.

32. The computer readable storage medium of claim 31, wherein the PDUs are selected based on the PDUs'"'"' original transmission time.

33. The computer readable storage medium of claim 31, wherein the PDUs are selected based on the PDUs'"'"' most recent transmission time.

34. The computer readable storage medium of claim 31, wherein the unacknowledged PDUs are ordered from least recent transmission time to most recent transmission time, and altering the PDU index comprises incrementing the PDU index.

35. The computer readable storage medium of claim 31, wherein the unacknowledged PDUs are ordered from most recent transmission time to least recent transmission time, and altering the PDU index comprises decrementing the PDU index.

36. The computer readable storage medium of claim 31, wherein the unacknowledged PDUs are randomly ordered.

37. The computer readable storage medium of claim 31, wherein the selecting is in response to the expiration of a timer.

38. The computer readable storage medium of claim 31, wherein the retransmitting is in response to the expiration of a timer.

39. The computer readable storage medium of claim 31, further comprising instructions that, when executed by a processor of an apparatus, cause the apparatus to:

transmit a second plurality of PDUs to the receiving device, and add the second plurality of PDUs to the set of PDUs that has not been acknowledged by the receiving device.

40. The computer readable storage medium of claim 31, wherein at least one of the first and second poll indicators comprises a bit in a packet header field.