Method and apparatus for transmit priority determination within a link

• US 9,113,492 B2
• Filed: 11/07/2011
• Issued: 08/18/2015
• Est. Priority Date: 11/07/2011
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Maguluri, Siva Theja, Wu, Xinzhou, Subramanian, Sundar
• Primary Examiner(s): LAM, YEE F
• Application Number:
  US13/290,312
• Publication Number:
  US 20130114424A1
• Time in Patent Office: 1,380 Days
• Field of Search: 370/329, 370/252, 370/395.42, 455/501, 455/513, 455/135, 455/67.11
• US Class Current: 1/1
• CPC Class Codes: H04W 28/021 in wireless networks with changing topologies, e.g. ad-hoc networks self-organizing networks H04W84/18
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 72/566 of the information or information source or recipient
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

A method, computer program product, and an apparatus for a transmit priority distributed backoff are provided. The apparatus forms a peer-to-peer communication link with a second apparatus. In addition, the apparatus determines whether to transmit in an assigned resource for securing a transmit priority for transfer of data to the second apparatus based on a quality of service estimation. Furthermore, the apparatus transmits to the second apparatus based on the determination. A method, computer program product, and an apparatus for a transmit priority token passing are provided. The apparatus forms a peer-to-peer communication link with a second apparatus. In addition, the apparatus determines a transmit priority within the link based on a quality of service estimation. The transmit priority is a priority of transmission between the apparatus and the second apparatus in the link.

Claims

1. A method of an apparatus for wireless communication, comprising:

forming a peer-to-peer communication link with a second apparatus;

determining whether the apparatus has a transmit priority over the second apparatus in the peer-to-peer communication link;

determining, upon determining the apparatus has transmit priority over the second apparatus, whether to transmit in an assigned resource for securing the transmit priority over the second apparatus in the peer-to-peer communication link for transfer of data to the second apparatus based on a quality of service estimation, the assigned resource being in a first subset of contention resources of a set of contention resources, wherein the apparatus transmits in the assigned resource to indicate an intention to secure the transmit priority over the second apparatus in the peer-to-peer communication link; and

transmitting to the second apparatus in the assigned resource based on the determination of whether to transmit in the assigned resources;

wherein the quality of service estimation is obtained by;

obtaining a first quality of service requirement for the apparatus;

receiving a second quality of service requirement from the second apparatus while forming the peer-to-peer communication link, the second quality of service requirement being for the second apparatus;

determining whether the first quality of service requirement is satisfied for the apparatus; and

estimating whether the second quality of service requirement is satisfied for the second apparatus,

wherein the quality of service estimation is based on a comparison of the satisfaction of the first quality of service requirement by the apparatus and the satisfaction of the second quality of service requirement by the second apparatus.

2. The method of claim 1, wherein the transmitting to the second apparatus in the assigned resource based on the determination comprises:

transmitting to the second apparatus in the assigned resource when a second quality of service requirement is satisfied by the second apparatus; and

refraining from transmitting to the second apparatus in the assigned resource when a first quality of service requirement is satisfied by the apparatus and the second quality of service requirement is unsatisfied by the second apparatus.

3. The method of claim 1, wherein the transmitting to the second apparatus in the assigned resource based on the determination comprises:

determining a first difference quantity between a current quality of service achieved by the apparatus and a first quality of service requirement of the apparatus;

determining a second difference quantity between a current quality of service achieved by the second apparatus and a second quality of service requirement of the second apparatus;

comparing the first difference quantity and the second difference quantity; and

determining whether to transmit to the second apparatus based on the comparison.

4. The method of claim 1, wherein the quality of service estimation is based on at least one of a latency requirement or a throughput requirement.

5. The method of claim 4, wherein:

the quality of service estimation is based on said latency requirement;

the determining whether the first quality of service requirement is satisfied for the apparatus is based on packet delays of transmitted packets; and

the estimating whether the second quality of service requirement is satisfied for the second apparatus is based on a comparison of a first time stamp indicating when a data packet was formed by the second apparatus and a second time stamp indicating when the data packet was received by the apparatus.

6. The method of claim 4, wherein:

the quality of service estimation is based on said throughput requirement;

the determining whether the first quality of service requirement is satisfied for the apparatus is based on a number of packets successfully transmitted in a particular duration of time; and

the estimating whether the second quality of service requirement is satisfied is based on a number of packets successfully received in the particular duration of time.

7. The method of claim 1, further comprising:

obtaining a first quality of service requirement for the apparatus; and

receiving a second quality of service requirement from the second apparatus while forming the peer-to-peer communication link, the second quality of service requirement being for the second apparatus,

wherein the quality of service estimation is based on a comparison of the first quality of service requirement and the second quality of service requirement.

8. The method of claim 1, wherein the assigned resource is a transmit priority resource for indicating an intent to transmit the data to the second apparatus.

9. A method of an apparatus for wireless communication, comprising:

forming a peer-to-peer communication link with a second apparatus;

determining a transmit priority as between the apparatus and the second apparatus within the peer-to-peer communication link based on a quality of service estimation, the transmit priority being a priority of transmission between the apparatus and the second apparatus in the peer-to-peer communication link; and

determining whether to transmit in an assigned resource based at least on the determination of the transmit priority, the assigned resource being in a first subset of contention resources of a set of contention resources,

wherein the transmit priority indicates whether the apparatus has the priority of transmission over the second apparatus to transmit data in the peer-to-peer communication link;

wherein the quality of service estimation is obtained by;

obtaining a first quality of service requirement for the apparatus;

receiving a second quality of service requirement from the second apparatus while forming the peer-to-peer communication link, the second quality of service requirement being for the second apparatus;

determining whether the first quality of service requirement is satisfied for the apparatus; and

estimating whether the second quality of service requirement is satisfied for the second apparatus,

wherein the quality of service estimation is based on a comparison of the satisfaction of the first quality of service requirement by the apparatus and the satisfaction of the second quality of service requirement by the second apparatus.

10. The method of claim 9, further comprising:

obtaining a first quality of service requirement for the apparatus; and

receiving a second quality of service requirement from the second apparatus while forming the peer-to-peer communication link, the second quality of service requirement being for the second apparatus,

wherein the quality of service estimation is based on a comparison of the first quality of service requirement and the second quality of service requirement.

11. The method of claim 9, wherein the determining whether the first quality of service requirement is satisfied for the apparatus is based on packet delays of transmitted packets, and the estimating whether the second quality of service requirement is satisfied for the second apparatus is based on a comparison of a first time stamp indicating when a data packet was formed by the second apparatus and a second time stamp indicating when the data packet was received by the apparatus.

12. The method of claim 9, wherein the determining whether the first quality of service requirement is satisfied for the apparatus is based on a number of packets successfully transmitted in a particular duration of time, and the estimating whether the second quality of service requirement is satisfied for the second apparatus is based on a number of packets successfully received in the particular duration of time.

13. The method of claim 9, further comprising:

determining to maintain the transmit priority with the apparatus based on a first quality of service estimation;

determining to pass an ability to determine the transmit priority to the second apparatus based on a second quality of service estimation; and

informing the second apparatus that the ability to determine the transmit priority is being passed to the second apparatus.

14. An apparatus for wireless communication, comprising:

means for forming a peer-to-peer communication link with a second apparatus;

means for determining whether the apparatus has a transmit priority over the second apparatus in the peer-to-peer communication link;

means for determining, upon determining the apparatus has transmit priority over the second apparatus, whether to transmit in an assigned resource for securing the transmit priority over the second apparatus in the peer-to-peer communication link for transfer of data to the second apparatus based on a quality of service estimation, the assigned resource being in a first subset of contention resources of a set of contention resources, wherein the apparatus transmits in the assigned resource to indicate an intention to secure the transmit priority over the second apparatus in the peer-to-peer communication link; and

means for transmitting to the second apparatus in the assigned resource based on the determination of whether to transmit in the assigned resources;

wherein the quality of service estimation is obtained by;

means for obtaining a first quality of service requirement for the apparatus;

means for receiving a second quality of service requirement from the second apparatus while forming the peer-to-peer communication link, the second quality of service requirement being for the second apparatus;

means for determining whether the first quality of service requirement is satisfied for the apparatus; and

means for estimating whether the second quality of service requirement is satisfied for the second apparatus,

wherein the quality of service estimation is based on a comparison of the satisfaction of the first quality of service requirement by the apparatus and the satisfaction of the second quality of service requirement by the second apparatus.

15. The apparatus of claim 14, wherein the means for transmitting to the second apparatus in the assigned resource based on the determination is configured to:

transmit to the second apparatus in the assigned resource when a second quality of service requirement is satisfied by the second apparatus; and

refrain from transmitting to the second apparatus in the assigned resource when a first quality of service requirement is satisfied by the apparatus and the second quality of service requirement is unsatisfied by the second apparatus.

16. The apparatus of claim 14, wherein the means for transmitting to the second apparatus in the assigned resource based on the determination is configured to:

determine a first difference quantity between a current quality of service achieved by the apparatus and a first quality of service requirement of the apparatus;

determine a second difference quantity between a current quality of service achieved by the second apparatus and a second quality of service requirement of the second apparatus;

compare the first difference quantity and the second difference quantity; and

determine whether to transmit to the second apparatus based on the comparison.

17. The apparatus of claim 14, wherein the quality of service estimation is based on at least one of a latency requirement or a throughput requirement.

18. The apparatus of claim 17, wherein:

the quality of service estimation is based on said latency requirement;

the means for determining whether the first quality of service requirement is satisfied for the apparatus performs the determination based on packet delays of transmitted packets; and

the means for estimating whether the second quality of service requirement is satisfied for the second apparatus performs the estimation based on a comparison of a first time stamp indicating when a data packet was formed by the second apparatus and a second time stamp indicating when the data packet was received by the apparatus.

19. The apparatus of claim 17, wherein:

the quality of service estimation is based on said throughput requirement;

the means for determining whether the first quality of service requirement is satisfied for the apparatus performs the determination based on a number of packets successfully transmitted in a particular duration of time; and

the means for estimating whether the second quality of service requirement is satisfied performs the estimation based on a number of packets successfully received in the particular duration of time.

20. The apparatus of claim 14, further comprising:

the means for obtaining a first quality of service requirement for the apparatus; and

the means for receiving a second quality of service requirement from the second apparatus while forming the peer-to-peer communication link, the second quality of service requirement being for the second apparatus,

wherein the quality of service estimation is based on a comparison of the first quality of service requirement and the second quality of service requirement.

21. The apparatus of claim 14, wherein the assigned resource is a transmit priority resource for indicating an intent to transmit the data to the second apparatus.

22. An apparatus for wireless communication, comprising:

means for forming a peer-to-peer communication link with a second apparatus;

means for determining a transmit priority as between the apparatus and the second apparatus within the peer-to-peer communication link based on a quality of service estimation, the transmit priority being a priority of transmission between the apparatus and the second apparatus in the peer-to-peer communication link; and

means for determining whether to transmit in an assigned resource based at least on the determination of the transmit priority, the assigned resource being in a first subset of contention resources of a set of contention resources,

wherein the transmit priority indicates whether the apparatus has the priority of transmission over the second apparatus to transmit data in the peer-to-peer communication link;

wherein the quality of service estimation is obtained by;

means for obtaining a first quality of service requirement for the apparatus;

means for receiving a second quality of service requirement from the second apparatus while forming the peer-to-peer communication link, the second quality of service requirement being for the second apparatus;

means for determining whether the first quality of service requirement is satisfied for the apparatus; and

means for estimating whether the second quality of service requirement is satisfied for the second apparatus,

wherein the quality of service estimation is based on a comparison of the satisfaction of the first quality of service requirement by the apparatus and the satisfaction of the second quality of service requirement by the second apparatus.

23. The apparatus of claim 22, further comprising:

the means for obtaining a first quality of service requirement for the apparatus; and

the means for receiving a second quality of service requirement from the second apparatus while forming the peer-to-peer communication link, the second quality of service requirement being for the second apparatus,

wherein the quality of service estimation is based on a comparison of the first quality of service requirement and the second quality of service requirement.

24. The apparatus of claim 22, wherein the means for determining whether the first quality of service requirement is satisfied for the apparatus performs the determination based on packet delays of transmitted packets, and the means for estimating whether the second quality of service requirement is satisfied for the second apparatus performs the estimation based on a comparison of a first time stamp indicating when a data packet was formed by the second apparatus and a second time stamp indicating when the data packet was received by the apparatus.

25. The apparatus of claim 22, wherein the means for determining whether the first quality of service requirement is satisfied for the apparatus performs the determination based on a number of packets successfully transmitted in a particular duration of time, and the means for estimating whether the second quality of service requirement is satisfied for the second apparatus performs the estimation based on a number of packets successfully received in the particular duration of time.

26. The apparatus of claim 22, further comprising:

the means for determining to maintain the transmit priority with the apparatus based on a first quality of service estimation;

the means for determining to pass an ability to determine the transmit priority to the second apparatus based on a second quality of service estimation; and

means for informing the second apparatus that the ability to determine the transmit priority is being passed to the second apparatus.

27. An apparatus for wireless communication, comprising:

a processing system configured to;

form a peer-to-peer communication link with a second apparatus;

determine whether the apparatus has a transmit priority over the second apparatus in the peer-to-peer communication link;

determine, upon determining the apparatus has transmit priority over the second apparatus, whether to transmit in an assigned resource for securing the transmit priority over the second apparatus in the peer-to-peer communication link for transfer of data to the second apparatus based on a quality of service estimation, the assigned resource being in a first subset of contention resources of a set of contention resources, wherein the apparatus transmits in the assigned resource to indicate an intention to secure the transmit priority over the second apparatus in the peer-to-peer communication link; and

transmit to the second apparatus in the assigned resource based on the determination of whether to transmit in the assigned resource;

wherein the quality of service estimation is obtained by;

obtain a first quality of service requirement for the apparatus;

receive a second quality of service requirement from the second apparatus while forming the peer-to-peer communication link, the second quality of service requirement being for the second apparatus;

determine whether the first quality of service requirement is satisfied for the apparatus; and

estimate whether the second quality of service requirement is satisfied for the second apparatus,

wherein the quality of service estimation is based on a comparison of the satisfaction of the first quality of service requirement by the apparatus and the satisfaction of the second quality of service requirement by the second apparatus.

28. The apparatus of claim 27, wherein the processing system is configured to transmit to the second apparatus in the assigned resource based on the determination by:

transmitting to the second apparatus in the assigned resource when a second quality of service requirement is satisfied by the second apparatus; and

refraining from transmitting to the second apparatus in the assigned resource when a first quality of service requirement is satisfied by the apparatus and the second quality of service requirement is unsatisfied by the second apparatus.

29. The apparatus of claim 27, wherein the processing system is configured to transmit to the second apparatus in the assigned resource based on the determination by:

determining a first difference quantity between a current quality of service achieved by the apparatus and a first quality of service requirement of the apparatus;

determining a second difference quantity between a current quality of service achieved by the second apparatus and a second quality of service requirement of the second apparatus;

comparing the first difference quantity and the second difference quantity; and

determining whether to transmit to the second apparatus based on the comparison.

30. The apparatus of claim 27, wherein the quality of service estimation is based on at least one of a latency requirement or a throughput requirement.

31. The apparatus of claim 30, wherein:

the quality of service estimation is based on said latency requirement;

the processing system is configured to determine whether the first quality of service requirement is satisfied for the apparatus based on packet delays of transmitted packets; and

the processing system is configured to estimate whether the second quality of service requirement is satisfied for the second apparatus based on a comparison of a first time stamp indicating when a data packet was formed by the second apparatus and a second time stamp indicating when the data packet was received by the apparatus.

32. The apparatus of claim 30, wherein:

the quality of service estimation is based on said throughput requirement;

the processing system is configured to determine whether the first quality of service requirement is satisfied for the apparatus is based on a number of packets successfully transmitted in a particular duration of time; and

the processing system is configured to estimate whether the second quality of service requirement is satisfied based on a number of packets successfully received in the particular duration of time.

33. The apparatus of claim 27, wherein the processing system is further configured to:

obtain a first quality of service requirement for the apparatus; and

receive a second quality of service requirement from the second apparatus while forming the peer-to-peer communication link, the second quality of service requirement being for the second apparatus,

wherein the quality of service estimation is based on a comparison of the first quality of service requirement and the second quality of service requirement.

34. The apparatus of claim 27, wherein the assigned resource is a transmit priority resource for indicating an intent to transmit the data to the second apparatus.

35. An apparatus for wireless communication, comprising:

a processing system configured to;

form a peer-to-peer communication link with a second apparatus;

determine a transmit priority as between the apparatus and the second apparatus within the peer-to-peer communication link based on a quality of service estimation, the transmit priority being a priority of transmission between the apparatus and the second apparatus in the peer-to-peer communication link; and

determine whether to transmit in an assigned resource based at least on the determination of the transmit priority, the assigned resource being in a first subset of contention resources of a set of contention resources,

wherein the transmit priority indicates whether the apparatus has the priority of transmission over the second apparatus to transmit data in the peer-to-peer communication link;

wherein the quality of service estimation is obtained by;

obtain a first quality of service requirement for the apparatus;

receive a second quality of service requirement from the second apparatus while forming the peer-to-peer communication link, the second quality of service requirement being for the second apparatus;

determine whether the first quality of service requirement is satisfied for the apparatus; and

estimate whether the second quality of service requirement is satisfied for the second apparatus,

wherein the quality of service estimation is based on a comparison of the satisfaction of the first quality of service requirement by the apparatus and the satisfaction of the second quality of service requirement by the second apparatus.

36. The apparatus of claim 35, wherein the processing system is further configured to:

obtain a first quality of service requirement for the apparatus; and

receive a second quality of service requirement from the second apparatus while forming the peer-to-peer communication link, the second quality of service requirement being for the second apparatus,

wherein the quality of service estimation is based on a comparison of the first quality of service requirement and the second quality of service requirement.

37. The apparatus of claim 35, wherein the processing system is configured to determine whether the first quality of service requirement is satisfied for the apparatus based on packet delays of transmitted packets, and to estimate whether the second quality of service requirement is satisfied for the second apparatus based on a comparison of a first time stamp indicating when a data packet was formed by the second apparatus and a second time stamp indicating when the data packet was received by the apparatus.

38. The apparatus of claim 35, wherein the processing system is configured to determine whether the first quality of service requirement is satisfied for the apparatus based on a number of packets successfully transmitted in a particular duration of time, and to estimate whether the second quality of service requirement is satisfied for the second apparatus based on a number of packets successfully received in the particular duration of time.

39. The apparatus of claim 35, wherein the processing system is further configured to:

determine to maintain the transmit priority with the apparatus based on a first quality of service estimation;

determine to pass an ability to determine the transmit priority to the second apparatus based on a second quality of service estimation; and

inform the second apparatus that the ability to determine the transmit priority is being passed to the second apparatus.

40. A computer program product in an apparatus for wireless communication, comprising:

a non-transitory computer-readable medium comprising code for;

forming a peer-to-peer communication link with a second apparatus;

determining whether the apparatus has a transmit priority over the second apparatus in the peer-to-peer communication link;

determining, upon determining the apparatus has transmit priority over the second apparatus, whether to transmit in an assigned resource for securing the transmit priority over the second apparatus in the peer-to-peer communication link for transfer of data to the second apparatus based on a quality of service estimation, the assigned resource being in a first subset of contention resources of a set of contention resources, wherein the apparatus transmits in the assigned resource to indicate an intention to secure the transmit priority over the second apparatus in the peer-to-peer communication link; and

transmitting to the second apparatus in the assigned resource based on the determination of whether to transmit in the assigned resources;

wherein the quality of service estimation is obtained by;

obtaining a first quality of service requirement for the apparatus;

receiving a second quality of service requirement from the second apparatus while forming the peer-to-peer communication link, the second quality of service requirement being for the second apparatus;

determining whether the first quality of service requirement is satisfied for the apparatus; and

estimating whether the second quality of service requirement is satisfied for the second apparatus,

wherein the quality of service estimation is based on a comparison of the satisfaction of the first quality of service requirement by the apparatus and the satisfaction of the second quality of service requirement by the second apparatus.

41. A computer program product in an apparatus for wireless communication, comprising:

a non-transitory computer-readable medium comprising code for;

forming a peer-to-peer communication link with a second apparatus;

determining a transmit priority as between the apparatus and the second apparatus within the peer-to-peer communication link based on a quality of service estimation, the transmit priority being a priority of transmission between the apparatus and the second apparatus in the peer-to-peer communication link; and

determining whether to transmit in an assigned resource based at least on the determination of the transmit priority, the assigned resource being in a first subset of contention resources of a set of contention resources,

wherein the transmit priority indicates whether the apparatus has the priority of transmission over the second apparatus to transmit data in the peer-to-peer communication link;

wherein the quality of service estimation is obtained by;

obtaining a first quality of service requirement for the apparatus;

receiving a second quality of service requirement from the second apparatus while forming the peer-to-peer communication link, the second quality of service requirement being for the second apparatus;

determining whether the first quality of service requirement is satisfied for the apparatus; and

estimating whether the second quality of service requirement is satisfied for the second apparatus,

wherein the quality of service estimation is based on a comparison of the satisfaction of the first quality of service requirement by the apparatus and the satisfaction of the second quality of service requirement by the second apparatus.