SCHEDULING POLICY-BASED TRAFFIC MANAGEMENT

• US 20090207730A1
• Filed: 02/14/2008
• Published: 08/20/2009
• Est. Priority Date: 02/14/2008
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Sampath, Ashwin, Stamoulis, Anastasios
• Granted Patent: US 8,767,541 B2
• Time in Patent Office: Days
• US Class Current: 370/230.100
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04L 47/24 Traffic characterised by specific attributes, e.g. priority or QoS
• CPC Class Codes: H04W 28/02 Traffic management, e.g. flow control or congestion control
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 84/047 using dedicated repeater stations

Abstract

Various traffic management techniques may be employed in a multi-hop wireless communication system. For example, a decision to transmit data to another node may be based on whether that node is able to effectively transmit its data. A decision to transmit an interference management message may be based on the amount of data a parent node may transmit. A decision to transmit an interference management message may be based on how effectively data is being transmitted. A weight may be assigned for an interference management message based on a traffic scheduling policy.

Claims

1. A method of wireless communication, comprising:

determining, at a first wireless node, a traffic scheduling policy of a second wireless node;

generating, based on the scheduling policy, a quality of service indication relating to reception of data at the first wireless node; and

transmitting an interference management message comprising the indication.

2. The method of claim 1, wherein the indication comprises a weighting factor that is based on scheduled traffic flow through the first wireless node.

3. The method of claim 2, wherein the scheduling policy comprises equal grade of service between wireless relay nodes.

4. The method of claim 3, wherein:

the first wireless node transmits data to at least one other wireless node; and

the weighting factor is based on a minimum expected of quality of service associated with each of the at least one other wireless node.

5. The method of claim 2, wherein the scheduling policy comprises equal grade of service between all wireless nodes at any lowest levels of a hierarchy of wireless nodes.

6. The method of claim 5, wherein:

the first wireless node transmits data to at least one other wireless node; and

the weighting factor is based on a sum of an expected level of quality of service for each of the at least one other wireless node.

7. The method of claim 1, wherein the indication indicates a degree to which reception of data at the first wireless node is adversely affected by interfering transmissions from at least one other wireless node.

8. The method of claim 7, wherein the at least one other wireless node determines, based on the interference management message, whether to limit at least one transmission.

9. The method of claim 1, wherein the indication is based on an expected quality of service associated with the reception of data at the first wireless node.

10. The method of claim 9, wherein the quality of service relates to data throughput or latency.

11. The method of claim 1, wherein the first wireless node comprises a wireless relay node.

12. The method of claim 1, wherein the second wireless node comprises a wired access point.

13. An apparatus for wireless communication, comprising:

a scheduling policy determiner adapted to determine, at a first wireless node, a traffic scheduling policy of a second wireless node;

an interference controller adapted to generate, based on the scheduling policy, a quality of service indication relating to reception of data at the first wireless node; and

a transmitter adapted to transmit an interference management message comprising the indication.

14. The apparatus of claim 13, wherein the indication comprises a weighting factor that is based on scheduled traffic flow through the first wireless node.

15. The apparatus of claim 14, wherein the scheduling policy comprises equal grade of service between wireless relay nodes.

16. The apparatus of claim 15, wherein:

the first wireless node transmits data to at least one other wireless node; and

the interference controller is further adapted to generate the weighting factor based on a minimum expected of quality of service associated with each of the at least one other wireless node.

17. The apparatus of claim 14, wherein the scheduling policy comprises equal grade of service between all wireless nodes at any lowest levels of a hierarchy of wireless nodes.

18. The apparatus of claim 17, wherein:

the first wireless node transmits data to at least one other wireless node; and

the interference controller is further adapted to generate the weighting factor based on a sum of an expected level of quality of service for each of the at least one other wireless node.

19. The apparatus of claim 13, wherein the indication indicates a degree to which reception of data at the first wireless node is adversely affected by interfering transmissions from at least one other wireless node.

20. The apparatus of claim 19, wherein the at least one other wireless node determines, based on the interference management message, whether to limit at least one transmission.

21. The apparatus of claim 13, wherein the interference controller is further adapted to generate the indication based on an expected quality of service associated with the reception of data at the first wireless node.

22. The apparatus of claim 21, wherein the quality of service relates to data throughput or latency.

23. The apparatus of claim 13, wherein the first wireless node comprises a wireless relay node.

24. The apparatus of claim 13, wherein the second wireless node comprises a wired access point.

25. An apparatus for wireless communication, comprising:

means for determining, at a first wireless node, a traffic scheduling policy of a second wireless node;

means for generating, based on the scheduling policy, a quality of service indication relating to reception of data at the first wireless node; and

means for transmitting an interference management message comprising the indication.

26. The apparatus of claim 25, wherein the indication comprises a weighting factor that is based on scheduled traffic flow through the first wireless node.

27. The apparatus of claim 26, wherein the scheduling policy comprises equal grade of service between wireless relay nodes.

28. The apparatus of claim 27, wherein:

the first wireless node transmits data to at least one other wireless node; and

the means for generating generates the weighting factor based on a minimum expected of quality of service associated with each of the at least one other wireless node.

29. The apparatus of claim 26, wherein the scheduling policy comprises equal grade of service between all wireless nodes at any lowest levels of a hierarchy of wireless nodes.

30. The apparatus of claim 29, wherein:

the first wireless node transmits data to at least one other wireless node; and

the means for generating generates the weighting factor based on a sum of an expected level of quality of service for each of the at least one other wireless node.

31. The apparatus of claim 25, wherein the indication indicates a degree to which reception of data at the first wireless node is adversely affected by interfering transmissions from at least one other wireless node.

32. The apparatus of claim 31, wherein the at least one other wireless node determines, based on the interference management message, whether to limit at least one transmission.

33. The apparatus of claim 25, wherein the means for generating generates the indication based on an expected quality of service associated with the reception of data at the first wireless node.

34. The apparatus of claim 33, wherein the quality of service relates to data throughput or latency.

35. The apparatus of claim 25, wherein the first wireless node comprises a wireless relay node.

36. The apparatus of claim 25, wherein the second wireless node comprises a wired access point.

37. A computer-program product for wireless communication, comprising:

computer-readable medium comprising codes executable to;

determine, at a first wireless node, a traffic scheduling policy of a second wireless node;

generate, based on the scheduling policy, a quality of service indication relating to reception of data at the first wireless node; and

transmit an interference management message comprising the indication.

38. An access point, comprising:

an antenna;

a scheduling policy determiner adapted to determine, at a first wireless node, a traffic scheduling policy of a second wireless node;

an interference controller adapted to generate, based on the scheduling policy, a quality of service indication relating to reception of data at the first wireless node; and

a transmitter adapted to transmit, via the antenna, an interference management message comprising the indication.

39. An access terminal, comprising:

a scheduling policy determiner adapted to determine, at a first wireless node, a traffic scheduling policy of a second wireless node;

an interference controller adapted to generate, based on the scheduling policy, a quality of service indication relating to reception of data at the first wireless node;

a transmitter adapted to transmit an interference management message comprising the indication; and

a user interface configured to output an indication based on data received from another wireless node.