Channel quality indicator for time, frequency and spatial channel in terrestrial radio access network

• US 20070026808A1
• Filed: 08/01/2005
• Published: 02/01/2007
• Est. Priority Date: 08/01/2005
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Nory, Ravikiran, Sun, Yakun, Classon, Brian, Love, Robert, Stewart, Kenneth, Bachu, Raja
• Granted Patent: US 7,457,588 B2
• Time in Patent Office: Days
• US Class Current: 455/67.700
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 25/0228 with direct estimation from sounding signals
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0026 Division using four or more dimensions
• CPC Class Codes: H04L 5/0046 Determination of how many bits are transmitted on different sub-channels
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 74/00 Wireless channel access

Abstract

A wireless communication terminal (200) that communicates on a plurality of sub-carriers divided into a plurality of frequency bands, wherein each frequency band includes at least one sub-carrier. The terminal successively generates channel quality indicator (CQI) measurement information reports based on CQI measurements, wherein each report includes non-differential channel quality indicator measurement information for at least one of the frequency bands and differential channel quality indicator measurement information for all other frequency bands.

Claims

1. A method in a wireless communication device capable of communicating on a channel comprising a plurality of sub-carriers divided into a plurality of frequency bands, wherein each frequency band includes at least one sub-carrier, the method comprising:

measuring a channel quality indicator for a plurality of frequency bands;

reporting channel quality indicator measurement information in successive reports,

each report including non-differential channel quality indicator measurement information for at least one of the frequency bands and each report including differential channel quality indicator measurement information for all other frequency bands for which the channel quality indicator was measured,

each successive report including non-differential channel quality indicator measurement information for different frequency bands and each successive report including differential channel quality measurement indicator information for all other frequency bands for which the channel quality indicator was measured.

2. The method of claim 1,

each report including non-differential channel quality indicator measurement information for not more than one of the frequency bands, each report including differential channel quality indicator measurement information for all other frequency bands for which the channel quality indicator was measured.

3. The method of claim 2, cyclicly reporting channel quality indicator information for each one of the frequency bands in successive reports.

4. The method of claim 1, reporting non-differential channel quality indicator measurement information includes reporting average channel quality indicator measurement information.

5. The method of claim 1, reporting differential channel quality indicator measurement information in a bit map.

6. The method of claim 5, reporting the non-differential channel quality indicator measurement information separately from the bit map.

7. The method of claim 1, reporting the differential channel quality indicator information using fewer bits than used for reporting channel quality indicator information.

8. The method of claim 1, reporting the differential channel quality indicator measurement information in a bit map wherein the bit map in each of the successive reports has a common number of bits.

9. The method of claim 1, receiving information identifying the plurality of frequency bands for which the channel quality indicator is to be measured before measuring.

10. The method of claim 1, basing the differential channel quality measurement indicator information on channel quality indicator measurement information reported previously for the corresponding channel.

11. A wireless communication terminal, comprising:

a transceiver capable of communicating on a channel comprising a plurality of sub-carriers divided into a plurality of frequency bands, wherein each frequency band includes at least one sub-carrier;

a processor communicably coupled to the transceiver, the processor obtaining channel quality indicator measurements for a plurality of frequency bands,

the processor successively generating channel quality indicator measurement information reports based on the channel quality indicator measurements,

each report including non-differential channel quality indicator measurement information for at least one of the frequency bands and each report including differential channel quality indicator measurement information for all other frequency bands for which the channel quality indicator was measured,

each successive report including non-differential channel quality indicator measurement information for different frequency bands and each successive report including differential channel quality measurement indicator information for all other frequency bands for which the channel quality indicator was measured.

12. The terminal of claim 11, each report includes a bit map having non-differential channel quality indicator measurement information and each the report includes non-differential channel quality indicator measurement information for at least one of the frequency bands.

13. The terminal of claim 11, the report has fewer bits allocated for reporting the differential channel quality indicator information than bits allocated for reporting non-differential channel quality indicator information.

14. The terminal of claim 12, the bit map in each of the successive reports has substantially the same number of bits.

15. The terminal of claim 11, the differential channel quality measurement indicator information is based on channel quality indicator measurement information reported previously for the corresponding channel.