Method and packet radio system for controlling link adaptation

Details Method and packet radio system for controlling link adaptation Method and packet radio system for controlling link adaptation

2007-11-13

2007-11-13

Gesesse, Tilahun (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Plural transmitters or receivers

C455S063100, C455S452200

Reexamination Certificate

active

10716530

ABSTRACT:
A method of controlling link adaptation in a packet radio system is described, the method comprising receiving (302) a CQI (channel quality indicator) report, the CQI report including the number of parallel multi-codes, the transport block size, TBS, and the modulation scheme to be used in link adaptation; and calculating an effective code rate, ECR, based on the received CQI report. The method comprises calculating (306) new estimates for the effective code rate (ECR) and the transport block size (TBS) based on a ratio of the number of multi-codes of the CQI report and the number of multi-codes that the packet radio system has available for transmission, and executing (308) link adaptation based on the new estimates for the effective code rate (ECR) and the transport block size (TBS).

REFERENCES:
patent: 7113782 (2006-09-01), Lucidarme
patent: 2004/0022213 (2004-02-01), Choi et al.
patent: 2004/0142698 (2004-07-01), Pietraski
Motorola, Ericsson, Revised CQI proposal Apr. 9-12, 2002, pp. 1-8, see appendix A.
3GPP TS 25.215 v5.3.0, Mar. 2003, Technical Specification, 3rdGeneration Partnership Project; Technical Specification Group Radio Access Network; Physical Layer—Measurements (FDD) (Release 5), pp. 1-18.
3GPP TS 25.212 v5.3.0, Dec. 2002, Technical Specification, 3rdGeneration Partnership Project; Technical Specification Group Radio Access Network; Multiplexing and Channel Coding (FDD) (Release 5), pp. 1-74.

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