Network controlled channel information reporting

• US 7,599,698 B2
• Filed: 12/29/2003
• Issued: 10/06/2009
• Est. Priority Date: 12/29/2003
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Cheng, Jung-Fu, Krasny, Leonid, Grant, Stephen J., Molnar, Karl J., Wang, Yi-Pin
• Primary Examiner(s): Edouard; Patrick N.
• Assistant Examiner(s): CAI, WAYNE HUU
• Application Number:
  US10/747,752
• Publication Number:
  US 20050143084A1
• Time in Patent Office: 2,108 Days
• Field of Search: 455450-453, 455509-510, 455/513, 455/423, 455/434, 370/252, 370/329, 370/341, 370/441, 370/465, 370/468, 370/523, 370/320
• US Class Current: 455/452.2
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0027 Scheduling of signalling, e.g. occurrence thereof
• CPC Class Codes: H04L 1/0028 Formatting
• CPC Class Codes: H04L 1/0029 Reduction of the amount of signalling, e.g. retention of useful signalling or differential signalling power control H04W52/04
• CPC Class Codes: H04L 1/0031 Multiple signaling transmission H04L1/1664, F15 take precedence
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 8/24 Transfer of terminal data

Abstract

A method of supplying channel information in a wireless communication system comprises a mobile terminal normally providing a basic channel report to the wireless communication system; the mobile terminal receiving at least one common feedback criterion broadcast to a plurality of mobile terminals; the mobile terminal determining if the mobile terminal satisfies a condition based on the at least one common feedback criterion; and the mobile terminal selectively providing an enhanced channel report to the wireless communication system based on the determining. The basic channel report may comprise information related to a first set of channel parameters, and the enhanced channel report may provide greater detail on the first set of channel parameters and/or relate to a second set of channel parameters. A method of a base station adaptively controlling channel information reporting by broadcast transmitting at least one common feedback criterion is also presented.

Claims

1. A method of reporting channel information in a wireless communication system, comprising:

a mobile terminal normally providing a basic channel report, said basic channel report at least partially characterizing a downlink channel;

said mobile terminal receiving at least one common feedback criterion broadcast to a plurality of mobile terminals;

said mobile terminal determining whether said mobile terminal satisfies a condition based on said at least one common feedback criterion; and

said mobile terminal selectively providing an enhanced channel report regarding said downlink channel if said condition is satisfied, wherein said enhanced channel report provides a more detailed view of said downlink channel than said basic channel report.

2. The method of claim 1 wherein providing an enhanced channel report comprises providing an enhanced channel report that is a superset of said basic channel report.

3. The method of claim 1 wherein said at least one common feedback criterion comprises at least one threshold.

4. The method of claim 3 wherein said at least one common feedback criterion comprises a channel quality indicator threshold.

5. The method of claim 3 wherein said at least one common feedback criterion comprises a throughput level threshold.

6. The method of claim 1 wherein said at least one common feedback criterion comprises at least one range.

7. The method of claim 1 wherein said basic channel report comprises a channel quality indicator.

8. The method of claim 1 wherein normally providing a basic channel report comprises normally providing a basic channel report on a periodic basis.

9. The method of claim 1 wherein said mobile terminal selectively providing an enhanced channel report based on said determining comprises said mobile terminal selectively providing, on a periodic basis, either said basic channel report or said enhanced channel report based on said determining.

10. The method of claim 1 wherein said basic channel report comprises information related to a first set of one or more channel parameters of said downlink channel, and wherein said enhanced channel report comprises further information on said first set of channel parameters.

11. The method of claim 1 wherein said basic channel report comprises information related to a first set of one or more channel parameters of said downlink channel, and wherein said enhanced channel report comprises information related to a second set of one or more channel parameters of said downlink channel different from said first set of channel parameters.

12. The method of claim 1 wherein said basic channel report comprises information related to a first set of one or more channel parameters of said downlink channel, and wherein said enhanced channel report comprises information related to said first set of channel parameters and information related to a second set of one or more channel parameters of said downlink channel different from said first set of channel parameters.

13. The method of claim 1:

wherein said basic channel report comprises a channel quality indicator; and

wherein said mobile terminal selectively providing an enhanced channel report based on said determining comprises said mobile terminal selectively providing either said basic channel report or said enhanced channel report based on said determining.

14. The method of claim 1 further comprising providing an explicit indication of the presence of said enhanced channel report when said enhanced channel report is provided.

15. The method of claim 1 further comprising employing a first spreading factor when transmitting said basic channel report and indicating the presence of said enhance channel report by employing a different second spreading factor when said enhanced channel report is transmitted.

16. The method of claim 1 further comprising employing a first pilot pattern when transmitting said basic channel report and indicating the presence of said enhance channel report by selectively employing a different second pilot pattern when said enhanced channel report is transmitted than when said basic channel report is transmitted.

17. The method of claim 1:

wherein providing a basic channel report comprises providing a basic channel report over a first logical channel; and

wherein selectively providing an enhanced channel report regarding said downlink channel comprises selectively providing an enhanced channel report over said first logical channel.

18. The method of claim 1:

wherein providing a basic channel report comprises providing a basic channel report over a first logical channel; and

wherein selectively providing an enhanced channel report regarding said downlink channel comprises selectively providing an enhanced channel report over at least a second logical channel.

19. The method of claim 18 wherein selectively providing an enhanced channel report over at least a second logical channel comprises selectively providing an enhanced channel report over said first logical channel and said second logical channel.

20. A wireless communications mobile terminal, comprising:

a transmitter operative to normally provide a basic channel report, said basic channel report at least partially characterizing a downlink channel;

a receiver operative to receive at least one common feedback criterion broadcast to a plurality of mobile terminals;

control logic coupled to said transmitter and said receiver and operative to determine whether said mobile terminal satisfies a condition based on said at least one common feedback criterion and to cause said transmitter to selectively transmit an enhanced channel report regarding said downlink channel if said condition is satisfied, wherein said enhanced channel report provides a more detailed view of said downlink channel than said basic channel report.

21. The mobile terminal of claim 20 wherein said enhanced channel report is a superset of said basic channel report.

22. The mobile terminal of claim 20 wherein said basic channel report comprises a channel quality indicator.

23. The mobile terminal of claim 20 wherein said transmitter is operative to normally provide said basic channel report on a periodic basis.

24. The mobile terminal of claim 20 wherein said basic channel report comprises information related to a first set of one or more channel parameters of said downlink channel, and wherein said enhanced channel report comprises further information on said first set of channel parameters.

25. The mobile terminal of claim 20 wherein said basic channel report comprises information related to a first set of one or more channel parameters of said downlink channel, and wherein said enhanced channel report comprises information related to a second set of one or more channel parameters of said downlink channel different from said first set of channel parameters.

26. The mobile terminal of claim 20 wherein said basic channel report comprises information related to a first set of one or more channel parameters of said downlink channel, and wherein said enhanced channel report comprises information related to said first set of channel parameters and information related to a second set of one or more channel parameters of said downlink channel different from said first set of channel parameters.

27. The mobile terminal of claim 20 wherein said control logic is further operative to cause said transmitter to transmit an explicit indication of the presence of said enhanced channel report when said enhanced channel report is transmitted.

28. The mobile terminal of claim 20 wherein said control logic is further operative to cause said transmitter to transmit using a first spreading factor if transmitting said basic channel report and a different second spreading factor if transmitting said enhanced channel report o indicate the presence of said enhanced channel report.

29. The mobile terminal of claim 20 wherein said control logic is further operative to cause said transmitter to transmit using a first pilot pattern if transmitting said basic channel report and a different second pilot pattern if transmitting said enhanced channel report to indicate the presence of said enhanced channel report.

30. The mobile terminal of claim 20:

wherein said transmitter is operative to normally said basic channel report over a first logical channel; and

wherein said control logic is further operative to cause said transmitter to selectively transmit an enhanced channel report regarding said downlink channel over said first logical channel based on said determining.

31. The mobile terminal of claim 20:

wherein said transmitter is operative to normally said basic channel report over a first logical channel; and

wherein said control logic is further operative to cause said transmitter to selectively transmit an enhanced channel report regarding said downlink channel over at least a second logical channel based on said determining.

32. The mobile terminal of claim 31 wherein said control logic is further operative to cause said transmitter to selectively transmit an enhanced channel report regarding said downlink channel over said first logical channel and said second logical channel based on said determining.

33. A method of controlling channel information reporting in a wireless communication system, comprising:

a base station receiving a plurality of basic channel reports transmitted from a plurality of mobile terminals, said basic channel reports at least partially characterizing one or more downlink channels from said base station;

determining, by said base station, at least one common feedback criterion;

said at least one common feedback criterion helping to define a condition whose satisfaction controls which plurality of said plurality of mobile terminals subsequently transmit an enhanced channel report regarding one or more of said downlink channels to said base station;

broadcast transmitting said at least one common feedback criterion from said base station to said plurality of mobile terminals; and

wherein said enhanced channel report provides a more detailed view of said downlink channel than said basic channel report.

34. The method of claim 33 wherein determining at least one common feedback criterion comprises determining at least one common feedback criterion based on at least a desired amount of enhanced channel reports.

35. The method of claim 34 wherein determining at least one common feedback criterion based on a desired amount of enhanced channel reports comprises determining at least one common feedback criterion based on said desired amount of enhanced channel reports and a data throughput rate.

36. The method of claim 34 wherein determining at least one common feedback criterion based on a desired amount of enhanced channel reports comprises determining at least one common feedback criterion based on said desired amount of enhanced channel reports and at least one reported channel quality indicator.

37. The method of claim 36 wherein determining at least one common feedback criterion based on said desired amount of enhanced channel reports and at least one reported channel quality indicator comprises determining at least one common feedback criterion based on said desired amount of enhanced channel reports and a plurality of reported channel quality indicators.

38. The method of claim 34 wherein determining at least one common feedback criterion based on a desired amount of enhanced channel reports comprises determining at least one common feedback criterion based on said desired amount of enhanced channel reports and an amount of data queued at said base station for transmission to a plurality of said plurality of mobile terminals.

39. A base station in a wireless communication system, comprising:

at least one receiver circuit receiving a plurality of basic channel reports transmitted from a plurality of mobile terminals, said basic channel reports at least partially characterizing one or more downlink channels from said base station;

a transmitter;

control logic connected to said receiver and said transmitter and operative to determine at least one common feedback criterion;

said at least one common feedback criterion helping to define a condition whose satisfaction controls which plurality of said plurality of mobile terminals subsequently transmit an enhanced channel report regarding one or more of said downlink channels to said base station;

said control logic further operative to cause said transmitter to transmit said at least one common feedback criterion in a broadcast fashion from said base station to said plurality of mobile terminals; and

wherein said enhanced channel report provides a more detailed view of said downlink channel than said basic channel report.

40. The base station of claim 39 wherein said control logic is further operative to determine said at least one common feedback criterion based on at least a desired amount of enhanced channel reports.

41. The base station of claim 40 wherein said control logic is further operative to determine said at least one common feedback criterion based on said desired amount of enhanced channel reports and a data throughput rate.

42. The base station of claim 40 wherein said control logic is further operative to determine said at least one common feedback criterion based on said desired amount of enhanced channel reports and at least one reported channel quality indicator.

43. The base station of claim 42 wherein said control logic is further operative to determine said at least one common feedback criterion based on said desired amount of enhanced channel reports and a plurality of reported channel quality indicators.

44. The base station of claim 40 wherein said control logic is further operative to determine said at least one common feedback criterion based on said desired amount of enhanced channel reports and an amount of data queued at said base station for transmission to a plurality of said plurality of mobile terminals.