Method for controlling power for a communications system having multiple traffic channels per subscriber

• US 6,285,886 B1
• Filed: 07/08/1999
• Issued: 09/04/2001
• Est. Priority Date: 07/08/1999
• Status: Expired due to Term

• Current Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Weaver, Carl Francis, Meyers, Martin Howard, Kamel, Raafat Edward, Kuo, Wen-Yi, Wu, Xiao Cheng
• Primary Examiner(s): Maung, Nay
• Assistant Examiner(s): Vuong, Quochien B.
• Application Number:
  US09/349,238
• Time in Patent Office: 789 Days
• Field of Search: 455/522, 455/63, 455/69, 455/67.1, 455/67.3, 455/70, 370/332, 370/333, 370/334, 370/335, 370/336, 370/337
• US Class Current: 455/522
• CPC Class Codes: H04W 52/12 Outer and inner loops
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/265 taking into account the quality of service QoS
• CPC Class Codes: H04W 52/283 Power depending on the position of the mobile

Abstract

A power control method of the invention may be applied to downlink power control, uplink power control, or both to support different quality of service levels for multiple channels per a mobile station. The power control method transmits control data between a base station and a multi-channel mobile station on a single communications channel or sub-channel to minimize or reduce overhead traffic from the control data.

Claims

1. A method for controlling power in a wireless communications system that supports multiple communication channels per mobile station, the method comprising the steps of:

recognizing a first quality of service target for a first communications channel and a second quality of service target for a second communications channel;

measuring a first quality of service parameter and a second quality of service parameter at a mobile station;

transmitting control data over at least one of said first communications channel and said second communications channel to control downlink transmit power based upon the first quality of service parameter and the first quality of service target and incremental offset data for the second communications channel.

2. The method according to claim 1 wherein transmitting control data further comprises transmitting a first difference between the first quality of service and the first quality of service target.

3. The method according to claim 1 further comprising the step of deriving a second difference between the second quality of service parameter and the second quality of service target with reference to the incremental offset data.

4. The method according to claim 1 wherein the transmitting step includes sending the incremental offset data on an as-needed basis.

5. The method according to claim 1 further comprising the step of updating the control data by sending a latest incremental offset data between the mobile station and the base station to supersede said incremental offset data in said transmitting step.

6. The method according to claim 1 further comprising the step of updating the control data by sending a latest incremental offset data between the mobile station and the base station to supersede said transmitted incremental offset data in said transmitting step, if the latest incremental offset data differs from said previous incremental offset data by a threshold amount or greater.

7. The method according to claim 1 wherein the transmitting step includes sending incremental update data related to the first difference and the incremental offset data related to a second difference between the second quality of service parameter and the second quality of service target.

8. The method according to claim 1 further comprising the step of establishing a voice channel as the first channel and a data channel as the second channel for temporally overlapping or simultaneous operation.

9. The method according to claim 1 wherein the setting step includes a first error rate as the first quality of service and a second error rate as the second quality of service, wherein the first error rate and the second error rate have different values.

10. The method according to claim 1 wherein the setting step includes a first frame-error rate as the first quality of service and a second frame-error rate as the second quality of service, wherein the frame-error rate and the second frame-error rate have different values.

11. A method for controlling power in a wireless communications system that supports multiple communication channels per subscriber, the method comprising the steps of:

recognizing a first quality of service target for a first communications channel and a second quality of service target for a second communications channel;

measuring a first quality of service parameter and a second quality of service parameter at a mobile station;

transmitting control data over a single control channel to control downlink transmit power based upon the first quality of service parameter and the first quality of service target and incremental offset data for the second communications channel.

12. The method according to claim 11 wherein transmitting control data further comprises transmitting a first difference between the first quality of service and the first quality of service target.

13. The method according to claim 11 further comprising the step of deriving a second difference between the second quality of service parameter and the second quality of service target with reference to the incremental offset data.

14. The method according to claim 11 wherein the transmitting of control data includes sending the incremental offset data on an as-needed basis.

15. The method according to claim 11 further comprising the step of updating the control data by sending a latest incremental offset data between the mobile station and the base station to supersede said incremental offset data in said transmitting step.

16. The method according to claim 11 further comprising the step of updating the control data by sending a latest incremental offset data between the mobile station and the base station to supersede said transmitted incremental offset data in said transmitting step, if the latest incremental offset data differs from said previous incremental offset data by a threshold amount or greater.

17. The method according to claim 11 wherein the transmitting of control data includes sending incremental update data related to the first difference and the incremental offset data related to a second difference between the second quality of service parameter and the second quality of service target.

18. The method according to claim 11 further comprising the step of establishing a first channel as a voice channel and a second channel as a data channel for temporally overlapping or simultaneous operation.

19. The method according to claim 11 wherein the setting step includes a first error rate as the first quality of service and a second error rate as the second quality of service, wherein the first error rate and the second error rate have different values.

20. The method according to claim 11 wherein the setting step includes a first frame-error rate as the first quality of service and a second frame-error rate as the second quality of service, wherein the frame-error rate and the second frame-error rate have different values.

21. A method for controlling power in a wireless communications system that supports multiple communication channels per subscriber, the method comprising the steps of:

setting a first quality of service target for the first communications channel and a second quality of service target for the second communications channel;

measuring a first quality of service parameter and a second quality of service parameter at a base station;

transmitting control data over one of said first communications channel and said second communications channel to control uplink transmit power based upon a first difference between the first quality of service parameter and the first quality of service target and incremental offset data.

22. The method according to claim 21 wherein transmitting control data further comprises transmitting a first difference between the first quality of service and the first quality of service target.

23. The method according to claim 21 further comprising the step of deriving a second difference between a second quality of service parameter and a second quality of service target with reference to the incremental offset data.

24. The method according to claim 21 wherein the transmitting of control data includes sending the incremental offset data on an as-needed basis.

25. The method according to claim 21 further comprising the step of updating the control data by sending a latest incremental offset data between the mobile station and the base station to supersede said incremental offset data in said transmitting step.

26. The method according to claim 21 further comprising the step of updating the control data by sending a latest incremental offset data between the mobile station and the base station to supersede said transmitted incremental offset data in said transmitting step, if the latest incremental offset data differs from said previous incremental offset data by a threshold amount or greater.

27. The method according to claim 21 wherein the transmitting of control data includes sending incremental update data related to the first difference and the incremental offset data related to a second difference between the second quality of service parameter and the second quality of service target.

28. The method according to claim 21 further comprising the step of establishing a voice channel as the first channel and a data channel as the second channel for temporally overlapping or simultaneous operation.

29. The method according to claim 21 wherein the setting step includes a first error rate as the first quality of service and a second error rate as the second quality of service, wherein the first error rate and the second error rate have different values.

30. The method according to claim 21 wherein the setting step includes a first frame-error rate as the first quality of service and a second frame-error rate as the second quality of service, wherein the frame-error rate and the second frame-error rate have different values.

31. A method for controlling power in a wireless communications system that supports multiple communication channels per subscriber, the method comprising the steps of:

setting a first quality of service target for the first communications channel and a second quality of service target for the second communications channel;

measuring a first quality of service parameter and a second quality of service parameter at a base station;

transmitting control data over a single control channel to control uplink transmit power based upon a first difference between the first quality of service parameter and the first quality of service target and incremental offset data.

32. The method according to claim 31 wherein transmitting control data further comprises transmitting a first difference between the first quality of service and the first quality of service target.

33. The method according to claim 31 further comprising the step of deriving a second difference between the second quality of service parameter and the second quality of service target with reference to the incremental offset data.

34. The method according to claim 31 wherein the transmitting of control data includes sending the incremental offset data on an as-needed basis.

35. The method according to claim 31 further comprising the step of updating the control data by sending a latest incremental offset data between the mobile station and the base station to supersede said incremental offset data in said transmitting step.

36. The method according to claim 31 further comprising the step of updating the control data by sending a latest incremental offset data between the mobile station and the base station to supersede said transmitted incremental offset data in said transmitting step, if the latest incremental offset data differs from said previous incremental offset data by a threshold amount or greater.

37. The method according to claim 31 wherein the transmitting of control data includes sending incremental update data related to the first difference and the incremental offset data related to a second difference between the second quality of service parameter and the second quality of service target.

38. The method according to claim 31 further comprising the step of establishing a voice channel as the first communications channel and a data channel as the second communications channel for simultaneous or overlapping operation.

39. The method according to claim 31 wherein the setting step includes a first error rate as the first quality of service and a second error rate as the second quality of service, wherein the first error rate and the second bit error rate have different values.

40. The method according to claim 31 wherein the setting step includes a first frame-error rate as the first quality of service and a second frame-error rate as the second quality of service, wherein the frame-error rate and the second frame-error rate have different values.