Negotiated channel information reporting in a wireless communication system

• US 20060287743A1
• Filed: 06/16/2006
• Published: 12/21/2006
• Est. Priority Date: 06/16/2005
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Sampath, Hemanth, Julian, David Jonathan
• Granted Patent: US 7,907,958 B2
• Time in Patent Office: Days
• US Class Current: 700/90
• CPC Class Codes: H04L 1/0016 involving special memory structures, e.g. look-up tables
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• 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 1/003 Adaptive formatting arrangements particular to signalling, e.g. variable amount of bits

Abstract

Techniques to enhance the performance in a wireless communication system using CQI feedback optimized to support different scenarios. According to one aspect, an access terminal may select a CQI feedback table based on the access terminals capability. According to another aspect, an access point may select a CQI feedback table based on an access terminals capability, system loading and the type of service provided by the access point. An access point which provides services that require high data rates may select a larger CQI feedback table to support the high data rates for access terminals which support the larger CQI feedback table. The same access point may select a smaller CQI feedback table for access terminals which do not have the capability or need for the high data rate services.

Claims

1. A method for determining feedback information to be provided, comprising:

receiving an indicator identifying at least one feedback table to use;

selecting a feedback table, from at least one feedback table, for quantizing channel information, wherein selecting is determined at least in part by the received indicator; and

transmitting information associated with the feedback table.

2. The method of claim 1, further comprising:

broadcasting a type of one or more of the at least one feedback table, wherein the received indicator may be determined by the type of feedback table broadcast.

3. The method of claim 1, further comprising:

providing a range of signal-to-noise ratios, wherein each of the at least one feedback tables comprises a range of signal-to-noise ratios each range corresponding to a feedback value.

4. The method of claim 1, further comprising:

providing information regarding a forward link channel quality, wherein each of the at least one feedback tables includes information indicative of a forward link channel quality.

5. The method of claim 1, further comprising:

providing information regarding a data transmission format, wherein each of the at least one feedback tables includes information that may be utilized to determine a packet format appropriate for data transmission.

6. The method of claim 1, further comprising:

transmitting a feedback table indicator, wherein the feedback table indicator comprises at least one bit.

7. The method of claim 6, wherein a feedback table comprising a smaller number of entries contains less quantizing channel information compared to a feedback table comprising a larger number of entries.

8. The method of claim 1, determining a system loading, wherein the selection of the feedback table is further a function of system loading.

9. The method of claim 1, further comprising:

determining a capability of an access terminal, wherein the selection of the feedback table is further a function the capability of an access terminal transmitting the indicator.

10. The method of claim 1, further comprising:

determining a reverse link capacity, wherein the selection of the feedback table is further a function of reverse link capacity.

11. The method of claim 10, further comprising:

determining the reverse link capacity utilizing a reverse link control channel capacity metric.

12. The method of claim 1, wherein each of the at least one feedback tables is a CQI table.

13. A method for providing information comprising:

transmitting at least one first indicator identifying at least one feedback table from a plurality of feedback tables for quantizing channel information;

receiving at least one second indicator identifying at least one feedback table;

determining based at least upon whether the at least one feedback table identified by the at least one second indicator is one of the at least one feedback table identified by the at least one first indicator;

selecting a feedback table from the plurality of feedback tables based on the determination; and

transmitting information associated with the selected feedback table.

14. The method of claim 13, wherein the determination indicates that the at least one feedback table identified by the at least one second received indicator is not one of the at least one feedback table identified by the at least one first transmitted indicator, said method further comprising:

transmitting at least one additional indicator identifying at least one feedback table from a plurality of feedback tables for quantizing channel information;

receiving at least one additional indicator identifying at least one feedback table; and

determining whether the at least one feedback table identified by the at least one additional received indicator is one of the at least one feedback table identified by the at least one additional transmitted indicator, wherein the selection further comprises;

selecting a feedback table from the plurality of the feedback tables based on the determination associated with the additional transmitted and received indicators.

15. The method of claim 13, further comprising:

providing information regarding a forward link channel quality, wherein each of the at least one feedback tables from a plurality of feedback tables includes information indicative of a forward link channel quality.

16. The method of claim 13, further comprising:

providing a range of signal-to-noise ratios, wherein at least one feedback tables from a plurality of feedback tables comprises a range of signal-to-noise ratios.

17. The method of claim 13, further comprising:

providing information regarding a data transmission format, wherein each of the at least one feedback tables from a plurality of feedback tables includes information that may be utilized to determine a packet format appropriate for data transmission.

18. The method of claim 13, wherein the feedback table includes information indicative of a forward link channel quality each range corresponding to a feedback value.

19. The method of claim 13, further comprising:

transmitting a feedback table indicator, wherein the feedback table indicator comprises at least one bit.

20. The method of claim 19, wherein a feedback table comprising a smaller number of entries contains less quantizing channel information compared to a feedback table comprising a larger number of entries.

21. The method of claim 13, further comprising:

determining a decoding complexity of an access point wherein the selection of the feedback table is further a function of the access point decoding complexity.

22. The method of claim 13, further comprising:

determining a reverse link capacity, wherein the selection of the feedback table is further a function of reverse link capacity.

23. The method of claim 13, further comprising:

determining the reverse link capacity utilizing a reverse link control channel capacity metric.

24. The method of claim 13, wherein each of the at least one feedback tables from a plurality of feedback tables is a CQI table.

25. A wireless communication apparatus comprising:

a receiver configured to receive an indicator identifying at least one feedback table;

a processor configured to select a feedback table from at least one feedback table for quantizing channel information, wherein the selection is determined at least in part by the received indicator; and

a transmitter configured to transmit information associated with the feedback table.

26. A wireless communication apparatus comprising:

a transmitter configured to transmit at least one first indicator identifying at least one feedback table from a plurality of feedback tables for quantizing channel information;

a receiver configured to receive at least one second indicator identifying at least one feedback table;

a processor configured to determine, based at least upon, whether the at least one feedback table identified by the at least one second indicator is one of the at least one feedback table identified by the at least one first indicator;

wherein the processor is configured to select a feedback table from the plurality of feedback tables based on the determination; and

wherein the transmitter is configured to transmit information associated with the selected feedback table.

27. A wireless communication apparatus comprising:

means for receiving an indicator identifying at least one feedback table to use;

means for selecting a feedback table, from at least one feedback table, for quantizing channel information, wherein selecting is determined at least in part by the received indicator; and

means for transmitting information associated with the feedback table.

28. A wireless communication apparatus comprising:

means for transmitting at least one first indicator identifying at least one feedback table from a plurality of feedback tables for quantizing channel information;

means for receiving at least one second indicator identifying at least one feedback table;

means for determining based at least upon whether the at least one feedback table identified by the at least one second indicator is one of the at least one feedback table identified by the at least one first indicator;

means for selecting a feedback table from the plurality of feedback tables based on the determination; and

means for transmitting information associated with the selected feedback table.