Method of controlling power

• US 20060270435A1
• Filed: 02/13/2006
• Published: 11/30/2006
• Est. Priority Date: 05/31/2005
• Status: Abandoned Application

• Current Assignee: Nokia Corporation
• Original Assignee: Nokia Corporation
• Inventors: Wigard, Jeroen, Chemiakina, Svetlana
• Application Number:
  US11/352,256
• Publication Number:
  US 20060270435A1
• Time in Patent Office: Days
• US Class Current: 455/522
• CPC Class Codes: H04W 52/125 cascaded outer loop power control
• CPC Class Codes: H04W 52/286 during data packet transmission, e.g. high speed packet access [HSPA]
• CPC Class Codes: H04W 52/48 during retransmission after error or non-acknowledgment

Abstract

A method of controlling power of a data channel, said method comprising the steps of defining for said channel a target value for a layer 1 block error rate L1 BLER and controlling the power of said data channel based on said target value.

Claims

1. A method of controlling power of a data channel, said method comprising the steps of:

defining for said data channel a target value for a layer 1 block error rate; and

controlling the power of said data channel based on said target value.

2. The method as claimed in claim 1, wherein said defining step comprises defining the target value for each service mapped onto said data channel.

3. The method as claimed in claim 1, wherein said defining step comprises defining said target value of the layer 1 block error rate after N transmissions where N is less than a maximum number of transmissions.

4. The method as claimed in claim 1, wherein said defining step takes place in a radio network controller.

5. The method as claimed in claim 1, wherein said defining step comprises using a table.

6. The method as claimed in claim 1, wherein in said defining step, the target value is dependent on at least one of traffic class, delay, error ratio requirements and Service Data Unit error ratio requirements.

7. The method as claimed in claim 1, wherein in said controlling step, outer loop power control is used.

8. The method as claimed in claim 1, wherein in said controlling step, based on said target value, controlling at least one of a target signal to interference ratio and a beta factor.

9. The method as claimed in claim 8, wherein said beta factor is defined by

${\beta }_{}$

ed = β

c ·

10 ( Δ

E - DPDCH 20 ) .

10. The method as claimed in claim 1, further comprising the step of monitoring at least one parameter of said data channel.

11. The method as claimed in claim 10, wherein said at least one parameter comprises at least one of:

transfer delay;

RLC level transfer delay;

error ratio; and

Service Data Unit error ratio.

12. The method as claimed in claim 1, comprising the step of adjusting said target value in dependence on a service requirement.

13. The method as claimed in claim 12, wherein said service requirement is a quality of service requirement.

14. The method as claimed in claim 10, comprising the step of adjusting said target value in dependence on a service requirement, wherein said adjusting step is configured to adjust said target value in dependence on a value of said at least one parameter.

15. The method as claimed in claim 1, wherein said data channel is an enhanced dedicated channel

16. A node in a communications system configured to control the power of a data channel, said node being configured to define for said data channel a target value for a layer 1 block error rate and to control the power of said data channel based on said target value.

17. The node as claimed in claim 16, wherein said node is a radio network controller.

18. The node as claimed in claim 16, wherein said node is configured to define the target value for each service mapped onto said data channel.

19. The node as claimed in claim 16, wherein said node is configured to define said target value of the layer 1 block error rate after N transmissions where N is less than a maximum number of transmissions.

20. The node as claimed in claim 16, wherein a memory is provided to store a table containing target values.

21. The node as claimed in claim 16, wherein the target value is dependent on at least one of traffic class, delay, error ratio requirements and Service Data Unit error ratio requirements.

22. The node as claimed in claim 16, wherein said node uses outer loop power control to control the power.

23. The node as claimed in claim 16, wherein said node is configured to control, based on said target value, at least one of a target signal to interference ratio and a beta factor.

24. The node as claimed in claim 23, wherein said beta factor is defined by

${\beta }_{}$

ed = β

c ·

10 ( Δ

E - DPDCH 20 ) .

25. The node as claimed in claim 16, further comprising means for monitoring at least one parameter of said data channel.

26. The node as claimed in claim 25, wherein said at least one parameter comprises at least one of transfer delay, RLC level transfer delay, error ratio, and Service Data Unit error ratio.

27. The node as claimed in claim 16, comprising means for adjusting said target value in dependence on a service requirement.

28. The node as claimed in claim 27, wherein said service requirement is a quality of service requirement.

29. A node as claimed in claim 25, comprising means for adjusting said target value in dependence on a service requirement, wherein said adjusting means is configured to adjust said target value in dependence on a value of said at least one parameter.

30. The node as claimed in claim 16, wherein said data channel is an enhanced dedicated channel

31. A system of controlling power of a data channel, said system comprising:

means for defining for said data channel a target value for a layer 1 block error rate; and

means for controlling the power of said data channel based on the target value.

32. A radio network controller in a communications system configured to control the power of a data channel, said radio network controller being configured to define for said data channel a target value for a layer 1 block error rate and to control the power of said data channel based on said target value.