Channel Quality Indicator Apparatus and Method

摘要

A method and apparatus are provided for a wireless communication system including a base station and at least one user equipment. A Channel Quality Indicator (CQI) table can be generated so that only an index corresponding to the measured CQI needs to be fed back to the base station. The CQI tables proposed herein may be suitable to different channel statistics, different Multiple Input Multiple Output (MIMO) mode and may be optimized based on either performance or implementation complexity. Multiple CQI tables may be formed into one compound CQI table. The CQI tables may be stored at both a base station and user equipment. The base station can select a CQI table from the set of tables. The base station signals the selection of the CQI table to the user equipment and the user equipment feeds back indices from the selected CQI table to the base station.

主权项

1. A method comprising:
forming by computing equipment a compound table including a plurality of individual channel quality indicator (CQI) tables generated for distribution to base stations and user equipment of a wireless communication system according to a set of block error rate (BLER) versus signal to noise ratio (SNR) curves, each table comprising a set of indices, each index corresponding to a respective modulation and coding scheme (MCS) level and to a respective measured signal-to-noise ratio, and for each table, the MCS levels being chosen based on expected block error rates for a respective channel statistic and/or Multiple-Input Multiple-Output (MIMO) transmission mode.