Messaging scheme for controlling uplink transmit power of a wireless device

• US 8,886,245 B2
• Filed: 02/29/2008
• Issued: 11/11/2014
• Est. Priority Date: 03/09/2007
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Dayal, Pranav, Ji, Tingfang
• Primary Examiner(s): Sorowar, Golam
• Application Number:
  US12/040,343
• Publication Number:
  US 20080220805A1
• Time in Patent Office: 2,447 Days
• Field of Search: 455/522, 455/69, 455/439, 455/450, 455/456.1, 455/423, 455/63.1, 455/525, 455/442, 370/232, 370/329, 370/229
• US Class Current: 455/522
• CPC Class Codes: H04W 52/10 Open loop power control
• CPC Class Codes: H04W 52/241 taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: H04W 52/247 where the output power of a terminal is based on a path parameter sent by another terminal
• CPC Class Codes: H04W 52/26 using transmission rate or quality of service QoS [Quality of Service]
• CPC Class Codes: H04W 52/28 using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission

Abstract

In a power control messaging scheme for wireless communication, a wireless node sends vectorized information to another wireless node that uses the information to control its transmit power. In some aspects, the vectorized information may relate to interference observed at a wireless node. In some aspects, the vectorized information may relate to power adjustment offsets. In some aspects, the information may be vectorized based on one or more of different quality of service classes, different assignments within a frame, different permutation zones, different channel differences, different locations of a wireless node, different channel types, different other sector interference values, and different assignment sizes. In some aspects, a wireless node transmits a power control message via an uplink map in an assignment message.

Claims

1. A method of power control for a wireless communication, comprising:

identifying different quality of service classes associated with different traffic flows;

obtaining other sector interference information associated with the different traffic flows, wherein the obtained other sector interference information indicates a degree of other sector interference caused by the different traffic flows with respect to one or more other sectors;

generating different indications of interference for the different quality of service classes based on the obtained other sector interference information; and

transmitting the different indications of interference associated with the different quality of service levels.

2. The method of claim 1, wherein the indications of interference comprise noise and interference values for an open loop power equation.

3. The method of claim 1, wherein each indication of interference comprises an incremental interference value.

4. The method of claim 1, further comprising identifying different classification factors associated with the different traffic flows, wherein:

the different classification factors comprise at least one of the group consisting of;

different assignments within a frame, different permutation zones, different channel differences, different locations of a wireless node, different channel types, different other sector interference values, and different assignment sizes; and

the different indications of interference are further generated based on the identified different classification factors.

5. The method of claim 4, wherein the different channel types comprise at least two of the group consisting of:

an acknowledgement channel, a CQI feedback channel, and a ranging channel.

6. The method of claim 4, wherein the permutation zones define wireless resource allocations based on at least one of the group consisting of:

a time dimension, a frequency dimension, a space dimension, and a code dimension.

7. The method of claim 1, wherein the indications of interference are transmitted via unicast messages.

8. The method of claim 1, wherein the traffic flows comprise uplink traffic flows.

9. The method of claim 1, wherein the different traffic flows are associated with different connections.

10. The method of claim 1, wherein each of the different quality of service classes specifies a different throughput and/or latency requirement for any traffic flows associated with the quality of service class as compared to any traffic flows associated with any of the other different quality of service classes.

11. An apparatus for power control in a wireless communication, comprising:

a classifier configured to identify different quality of service classes associated with different traffic flows;

an interference controller configured to obtain other sector interference information associated with the different traffic flows, wherein the obtained other sector interference information indicates a degree of other sector interference caused by the different traffic flows with respect to one or more other sectors, and generate different indications of interference for the different quality of service classes based on the obtained other sector interference information; and

a transmitter configured to transmit the different indications of interference associated with the different quality of service levels.

12. The apparatus of claim 11, wherein the indications of interference comprise noise and interference values for an open loop power equation.

13. The apparatus of claim 11, wherein:

the classifier is further configured to identify different classification factors associated with the different traffic flows;

the different classification factors comprise at least one of the group consisting of;

different assignments within a frame, different permutation zones, different channel differences, different locations of a wireless node, different channel types, different other sector interference values, and different assignment sizes; and

the interference controller is further configured to generate the different indications of interference based on the identified different classification factors.

14. The apparatus of claim 11, wherein the transmitter is further configured to transmit the indications of interference via unicast messages.

15. The apparatus of claim 11, wherein the traffic flows comprise uplink traffic flows.

16. An apparatus for power control in a wireless communication, comprising:

means for identifying different quality of service classes associated with different traffic flows;

means for obtaining other sector interference information associated with the different traffic flows, wherein the obtained other sector interference information indicates a degree of other sector interference caused by the different traffic flows with respect to one or more other sectors;

means for generating different indications of interference for the different quality of service classes based on the obtained other sector interference information; and

means for transmitting the different indications of interference associated with the different quality of service levels.

17. The apparatus of claim 16, wherein the indications of interference comprise noise and interference values for an open loop power equation.

18. The apparatus of claim 16, wherein:

the means for identifying identifies different classification factors associated with the different traffic flows;

the different classification factors comprise at least one of the group consisting of;

different assignments within a frame, different permutation zones, different channel differences, different locations of a wireless node, different channel types, different other sector interference values, and different assignment sizes; and

the means for generating generates the different indications of interference further based on the identified different classification factors.

19. The apparatus of claim 16, wherein the means for transmitting further transmits the indications of interference via unicast messages.

20. The apparatus of claim 16, wherein the traffic flows comprise uplink traffic flows.

21. A non-transitory computer-readable medium comprising code for causing a computer to:

identify different quality of service classes associated with different traffic flows;

obtain other sector interference information associated with the different traffic flows, wherein the obtained other sector interference information indicates a degree of other sector interference caused by the different traffic flows with respect to one or more other sectors;

generate different indications of interference for the different quality of service classes based on the obtained other sector interference information; and

transmit the different indications of interference associated with the different quality of service levels.

22. The non-transitory computer-readable medium of claim 21, wherein the indications of interference comprise noise and interference values for an open loop power equation.

23. The non-transitory computer-readable medium of claim 21, wherein:

the computer-readable medium further comprises code for causing the computer to identify different classification factors associated with the different traffic flows;

the different classification factors comprise at least one of the group consisting of;

different assignments within a frame, different permutation zones, different channel differences, different locations of a wireless node, different channel types, different other sector interference values, and different assignment sizes; and

the computer-readable medium further comprises code for causing the computer to generate the different indications of interference based on the identified different classification factors.

24. The non-transitory computer-readable medium of claim 21, wherein the computer-readable medium further comprises code for causing the computer to transmit the indications of interference via unicast messages.

25. The non-transitory computer-readable medium of claim 21, wherein the traffic flows comprise uplink traffic flows.

26. A method of power control performed at a subscriber station for a wireless communication, comprising:

receiving different indications of interference associated with different quality of service classes, wherein the different indications of interference are based upon a degree of other sector interference caused by different traffic flows with respect to one or more other sectors;

identifying a quality of service class associated with a traffic flow being transmitted by the subscriber station;

selecting an indication of interference by determining which one of the received indications of interference is associated with the identified quality of service class;

wherein the indications of interference are further associated with different classification factors comprising at least one of the group consisting of;

different assignments within a frame, different permutation zones, different channel differences, different locations of a wireless node, different channel types, different other sector interference values, and different assignment sizes;

the traffic flow is further associated with at least one of the different classification factors; and

the selection of the indication of interference further comprises determining which one of the received indications of interference is associated with the at least one of the different classification factors;

wherein the different channel types comprise at least two of the group consisting of;

an acknowledgement channel, a CQI feedback channel, and a ranging channel; and

defining uplink transmit power for the traffic flow based on the selected indication of interference.

27. The method of claim 26, wherein the indications of interference comprise noise and interference values for an open loop power equation.

28. The method of claim 26, wherein each indication of interference comprises an incremental interference value.

30. The method of claim 26, wherein the indications of interference are received via unicast messages.

31. The method of claim 26, wherein the traffic flow comprises an uplink traffic flow.

29. A method of power control performed at a subscriber station for a wireless communication, comprising:

receiving different indications of interference associated with different quality of service classes, wherein the different indications of interference are based upon a degree of other sector interference caused by different traffic flows with respect to one or more other sectors;

identifying a quality of service class associated with a traffic flow being transmitted by the subscriber station;

selecting an indication of interference by determining which one of the received indications of interference is associated with the identified quality of service class; and

defining uplink transmit power for the traffic flow based on the selected indication of interference

the indications of interference are further associated with different classification factors comprising at least one of the group consisting of;

different assignments within a frame, different permutation zones, different channel differences, different locations of a wireless node, different channel types, different other sector interference values, and different assignment sizes;

the traffic flow is further associated with at least one of the different classification factors;

wherein the permutation zones define wireless resource allocations based on at least one of the group consisting of;

a time dimension, a frequency dimension, a space dimension, and a code dimension; and

the selection of the indication of interference further comprises determining which one of the received indications of interference is associated with the at least one of the different classification factors.

32. A subscriber station for power control in a wireless communication, comprising:

a receiver configured to receive different indications of interference associated with different quality of service classes, wherein the different indications of interference are based upon a degree of other sector interference caused by different traffic flows with respect to one or more other sectors;

a classifier configured to identify a quality of service class associated with a traffic flow being transmitted by the subscriber station;

an indication selector configured to select an indication of interference by determining which one of the received indications of interference is associated with the identified quality of service class; and

a power controller configured to define uplink transmit power for the traffic flow based on the selected indication of interference.

33. The subscriber station of claim 32, wherein the indications of interference comprise noise and interference values for an open loop power equation.

34. The subscriber station of claim 32, wherein:

the indications of interference are further associated with different classification factors comprising at least one of the group consisting of;

different assignments within a frame, different permutation zones, different channel differences, different locations of a wireless node, different channel types, different other sector interference values, and different assignment sizes;

the classifier is further configured to identify at least one of the different classification factors as being associated with the traffic flow; and

the indication selector is further configured to select the indication of interference by determining which one of the received indications of interference is associated with the at least one of the different classification factors.

35. The subscriber station of claim 32, wherein the indications of interference are received via unicast messages.

36. The subscriber station of claim 32, wherein the traffic flow comprises an uplink traffic flow.

37. A subscriber station for power control in a wireless communication, comprising:

means for receiving different indications of interference associated with different quality of service classes, wherein the different indications of interference are based upon a degree of other sector interference caused by different traffic flows with respect to one or more other sectors;

means for identifying a quality of service class associated with a traffic flow being transmitted by the subscriber station;

means for selecting an indication of interference by determining which one of the received indications of interference is associated with the identified quality of service class; and

means for defining uplink transmit power for the traffic flow based on the selected indication of interference.

38. The subscriber station of claim 37, wherein the indications of interference comprise noise and interference values for an open loop power equation.

39. The subscriber station of claim 37, wherein:

the indications of interference are further associated with different classification factors comprising at least one of the group consisting of;

different assignments within a frame, different permutation zones, different channel differences, different locations of a wireless node, different channel types, different other sector interference values, and different assignment sizes;

the means for identifying identifies at least one of the different classification factors as being associated with the traffic flow; and

the means for selecting selects the indication of interference by further determining which one of the received indications of interference is associated with the at least one of the different classification factors.

40. The subscriber station of claim 37, wherein the indications of interference are received via unicast messages.

41. The subscriber station of claim 37, wherein the traffic flow comprises an uplink traffic flow.

42. A non-transitory computer-readable medium comprising code for causing a subscriber station to:

receive different indications of interference associated with different quality of service classes, wherein the different indications of interference are based upon a degree of other sector interference caused by different traffic flows with respect to one or more other sectors;

identify a quality of service class associated with a traffic flow being transmitted by the subscriber station;

select an indication of interference by determining which one of the received indications of interference is associated with the identified quality of service class; and

define uplink transmit power for the traffic flow based on the selected indication of interference.

43. The non-transitory computer-readable medium of claim 42, wherein the indications of interference comprise noise and interference values for an open loop power equation.

44. The non-transitory computer-readable medium of claim 42, wherein:

the indications of interference are further associated with different classification factors comprising at least one of the group consisting of;

different assignments within a frame, different permutation zones, different channel differences, different locations of a wireless node, different channel types, different other sector interference values, and different assignment sizes;

the computer-readable medium further comprises code for causing the computer to identify at least one of the different classification factors as being associated with the traffic flow; and

the computer-readable medium further comprises code for causing the computer to select the indication of interference by determining which one of the received indications of interference is associated with the at least one of the different classification factors.

45. The non-transitory computer-readable medium of claim 42, wherein the indications of interference are received via unicast messages.

46. The non-transitory computer-readable medium of claim 42, wherein the traffic flow comprises an uplink traffic flow.

47. A method of operating a subscriber station, comprising:

receiving different indications of interference associated with different assignment locations within a frame for a given permutation zone;

identifying an assignment location associated with a traffic flow being transmitted by the subscriber station;

selecting an indication of interference by determining which one of the received indications of interference is associated with the identified assignment location; and

defining uplink transmit power for the traffic flow based on the selected indication of interference.

48. The method of claim 47, wherein the different indications of interference include other sector interference information that indicates a degree of other sector interference caused by transmissions of the subscriber station on one or more of the different assignment locations to one or more other sectors.

49. A method of power control for a wireless communication, comprising:

generating a power control message; and

transmitting the power control message in an assignment message for uplink transmissions,

wherein the uplink transmissions are associated with a modulation coding scheme that has defined power levels

wherein the power control message is contained within an uplink map within the assignment message,

wherein the power control message is transmitted to a subscriber station, and

wherein the uplink map defines which timeslots upon which the subscriber station can transmit.

50. The method of claim 49, wherein the assignment message corresponds to a frame assignment message.

51. A method of power control for a wireless communication, comprising:

receiving a power control message in an assignment message for uplink transmissions, wherein the uplink transmissions are associated with a modulation coding scheme that has defined power levels;

wherein the power control message is contained within an uplink map within the assignment message,

wherein the power control message is received at a subscriber station, and

wherein the uplink map defines which timeslots upon which the subscriber station can transmit; and

defining transmit power for at least one of the uplink transmissions based on the received power control message.

52. A method of power control for a wireless communication, comprising:

identifying, at a base station, different quality of service classes associated with different traffic flows;

obtaining, at the base station, other sector interference information associated with the different traffic flows, wherein the obtained other sector interference information indicates a degree of other sector interference caused by the different traffic flows with respect to one or more other sectors;

generating, at the base station, different indications of the obtained other sector interference information for the different quality of service classes; and

transmitting, from the base station, the different indications of the obtained other sector interference information associated with the different quality of service levels.

53. The method of claim 52, wherein each of the different quality of service classes specifies a different throughput and/or latency requirement for any traffic flows associated with the quality of service class as compared to any traffic flows associated with any of the other different quality of service classes.

54. The method of claim 52, wherein the transmitting transmits the different indications of the obtained other sector interference information associated with the different quality of service levels to one or more subscriber stations to facilitate reverse-link power control for the different traffic flows.

55. A method of power control for a wireless communication, comprising:

receiving, at a subscriber station, different indications of interference associated with different quality of service classes, wherein the different indications of interference are based upon a degree of other sector interference caused by the different traffic flows with respect to one or more other sectors;

identifying, at the subscriber station, a quality of service class associated with a traffic flow being transmitted by the subscriber station;

selecting, at the subscriber station, an indication of interference by determining which one of the received indications of interference is associated with the identified quality of service class; and

defining, at the subscriber station, uplink transmit power for the traffic flow based on the selected indication of interference.