User terminal

Abstract

The invention discloses a user terminal. The problem that the number of information bits required by a control channel is increased because the number of variable parameters is increased if multi-input multi-output (MIMO) is used for transmitting exists. The problem that the information of the control channel is increased proportionately to the number of users if the number of the users performing multiplexing is increased in a single frame also exists. In order to solve the problems, first, error correction coding processing for the information of the control channel is performed by using an adaptive modulating and coding scheme; then, the information of the control channel which is subjected to error correction coding is modulated by using a preset coding scheme; next, the information of the control channel is transmitted; and finally, the coding rate in the error correction coding can be changed according to a transmission state by further setting.

Description

[0001] This application is an invention patent application with the original application number 200580051722.9 (international application number: PCT / JP2005 / 018117, filing date: September 30, 2005, invention name: control channel information transmission method and base station and terminal using this method) divisional application. technical field [0002] The present invention relates to a control channel information transmission method and a base station and a terminal using the method, more specifically, to a control channel information transmission method for packet communication that uses a control channel to adaptively control communication parameters, and uses A base station and a terminal of the method. Background technique [0003] In third generation mobile communication systems, adaptive radio links such as adaptive modulation / demodulation, HARQ (Hybrid Automatic Repeat Request) and scheduling are used to increase the transmission efficiency of data packets. [...

AI Technical Summary

Problems solved by technology

[0018] Thus, as shown in the relationship between MIMO application and control channel information volume Image 6 As shown in , in period III of propagation environment I to which MIMO is applied, there is a problem that the number of variable parameters increases and the number of information bits required for the control channel increases

Furthermore, when the number of simultaneously multiplexed users in a single frame increases, there is a problem that the control channel information also increases in proportion to the number of users

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