METHOD FOR DECREASING CONTROL INFORMATION CORRESPONDING TO MODULATION AND CODING SCHEME ON ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS/FREQUENCY DIVISION DUPLEX

摘要

The present invention relates to an MCS (Modulation & Coding Scheme) control information related reduction method in an OFDMA / FDD (Orthogonal Frequency Division Multiple Access / Frequency Division Duplex) communication system. A method of this method reduces the MCS associated control information in the OFDMA / FDD communication system that uses MCS selecting a channel coding scheme and modulation scheme according to a radio channel environment, a) a terminal, the base station during the call setup with the base station a particular top-level clusters by - where the cluster means a bundle of multiple subcarriers, and the top group meaning that the stack of units of the cluster in the group including the large-step taking allocation of a group; b) the terminal is contained in the cluster in the group by a particular top-level cluster group of the allocated by the base station the lowest cluster group - wherein the least significant cluster group meaning that the stack of units of a cluster included in the group of the small-Of comprising: a wireless environment, verify the location of the best clusters; c) the device is determined for the top of each group of cluster, a large similarity is determined level cluster group comprising clusters of the lowest group of the similarity of the clusters of the lowest group; d) the terminal determines an MCS level corresponding to the lowest radio environment by comparing the radio environment of the identified cluster in step b); And e) the terminal is a step in which the b) the location of the identified clusters in step c) above the determined cluster group level in the step, and the step d) passing the MCS associated control information including MCS level determined in step to the base station . According to the invention, the upper and to increase the system traffic throughput of the downlink from, OFDMA / FDD communication system by transmitting the MCS associated control information at a time, through a limited control channels to reduce the MCS-related control information transmitted through the DL have.