Implementing quality of service (QoS) by using hybrid ARQ (HARQ) response for triggering the EV-DO reverse activity bit (RAB)

• US 8,245,088 B1
• Filed: 06/30/2009
• Issued: 08/14/2012
• Est. Priority Date: 06/30/2009
• Status: Active Grant

• Current Assignee: Sprint Spectrum LLC (Deutsche Telekom AG)
• Original Assignee: Sprint Spectrum LP (Deutsche Telekom AG)
• Inventors: Srinivas, Shilpa Kowdley, Khanka, Bhagwan, Goyal, Anoop K., Pawar, Hemanth Balaji
• Primary Examiner(s): Baker, Stephen M
• Application Number:
  US12/494,999
• Time in Patent Office: 1,141 Days
• Field of Search: 714/708
• US Class Current: 714/708
• CPC Class Codes: H04L 1/0017 where the mode-switching is based on Quality of Service requirement
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1825 Adaptation of specific ARQ protocol parameters according to transmission conditions
• CPC Class Codes: H04L 1/1864 ARQ related signaling H04L1/1607 takes precedence

Abstract

Methods and systems are provided for implementing quality of service (QoS) by using Hybrid ARQ (HARQ) response for triggering the EV-DO reverse activity bit (RAB). In an embodiment, an access node provides service to a plurality of access terminals, the plurality including a select group of one or more access terminals. The access node detects that it has, over a time period, sent more than a threshold number of HARQ negative acknowledgements (NACKs) with respect to reverse-link communication of the select group, and responsively (1) sets the RAB for the first wireless coverage area and (2) instructs the select group of access terminals to ignore the RAB. The select group ignores the RAB, while the rest of the access terminals obey the RAB.

Claims

1. A method comprising:

an access node providing service to a plurality of access terminals in a first wireless coverage area, the plurality of access terminals comprising a select group of one or more access terminals; and

the access node detecting that, over a given first time period, the access node has sent more than a first threshold number of Hybrid ARQ (HARQ) negative acknowledgements (NACKs) with respect to reverse-link communication of the select group, and responsively;

setting a reverse activity bit (RAB) for the first wireless coverage area; and

instructing the select group of access terminals to ignore the RAB being set, wherein the access terminals in the select group responsively ignore the RAB being set, and wherein the access terminals in the plurality but not in the select group obey the RAB being set.

2. The method of claim 1, wherein the access node comprises a radio network controller (RNC) and at least one base transceiver station (BTS).

3. The method of claim 1, wherein the access node is an EV-DO access node, and wherein the access terminals are EV-DO access terminals, and wherein the service is compliant with at least one of IS-856, Release 0 and IS-856, Revision A.

4. The method of claim 1, wherein the first wireless coverage area is a cell or a sector.

5. The method of claim 1, wherein the select group consists of one access terminal.

6. The method of claim 1, wherein the select group comprises more than one access terminal.

7. The method of claim 1, wherein each access terminal in the select group is subscribed to a premium level of service.

8. The method of claim 1, wherein the RAB can be set or cleared, wherein a given access terminal ignoring the RAB being set has the options of maintaining or increasing a reverse-link data rate for the given access terminal, and wherein a given access terminal obeying the RAB being set has the options of maintaining or decreasing a reverse-link data rate for the given access terminal.

9. The method of claim 1, wherein instructing the select group of access terminals to ignore the RAB being set comprises broadcasting a message in the first wireless coverage area.

10. The method of claim 1, wherein instructing the select group of access terminals to ignore the RAB being set comprises sending a respective message directly to each access terminal in the select group.

11. The method of claim 1, further comprising the access node detecting that, over a given second time period, the access node has sent less than a second threshold number of HARQ NACKs with respect to reverse-link communication of the select group, and responsively clearing the RAB.

12. The method of claim 11, wherein the given first time period is equal in duration to the given second time period.

13. The method of claim 11, wherein the given first time period is not equal in duration to the given second time period.

14. The method of claim 11, wherein the first threshold number of HARQ NACKs is equal to the second threshold number of HARQ NACKs.

15. The method of claim 11, wherein the first threshold number of HARQ NACKs is not equal to the second threshold number of HARQ NACKs.

16. An access node comprising:

a communication interface comprising a wireless-communication interface;

a processor; and

data storage comprising instructions executable by the processor for causing the access node to carry out functions including;

providing service to a plurality of access terminals in a first wireless coverage area, the plurality of access terminals comprising a select group of one or more access terminals; and

detecting that, over a given first time period, the access node has sent more than a first threshold number of Hybrid ARQ (HARD) negative acknowledgements (NACKs) with respect to reverse-link communication of the select group, and responsively;

setting a reverse activity bit (RAB) for the first wireless coverage area; and

instructing the select group of access terminals to ignore the RAB being set, wherein the access terminals in the select group responsively ignore the RAB being set, and wherein the access terminals in the plurality but not in the select group obey the RAB being set.

17. The access node of claim 16, wherein the access node comprises a radio network controller (RNC) and at least one base transceiver station (BTS).

18. The access node of claim 16, wherein the access node is an EV-DO access node, and wherein the access terminals are EV-DO access terminals, and wherein the service is compliant with at least one of IS-856, Release 0 and IS-856, Revision A.

19. The access node of claim 16, wherein the first wireless coverage area is a cell or a sector.

20. The access node of claim 16, wherein the select group consists of one access terminal.

21. The access node of claim 16, wherein the select group comprises more than one access terminal.

22. The access node of claim 16, wherein each access terminal in the select group is subscribed to a premium level of service.

23. The access node of claim 16, wherein the RAB can be set or cleared, wherein a given access terminal ignoring the RAB being set has the options of maintaining or increasing a reverse-link data rate for the given access terminal, and wherein a given access terminal obeying the RAB being set has the options of maintaining or decreasing a reverse-link data rate for the given access terminal.

24. The access node of claim 16, the instructions for instructing the select group of access terminals to ignore the RAB being set comprise instructions for carrying out at least one of (1) broadcasting a message in the first wireless coverage area and (2) sending a respective message directly to each access terminal in the select group.

25. The access node of claim 16, the data storage further comprising instructions for detecting that, over a given second time period, the access node has sent less than a second threshold number of HARQ NACKs with respect to reverse-link communication of the select group, and responsively clearing the RAB.