Base station and user terminal used for receiving control channel information from transmitting station

Abstract

The invention discloses a base station and a user terminal used for receiving control channel information from a transmitting station. Problems are as follows: if MIMO (multiple input multiple output) is applied to transmission, the number of variable parameters is increased, so that the number of information bits needed by a control channel is increased; and the number of simultaneous reusable users is increased in a single frame, so that control channel information is increased proportionally with the number of users. In order to solve the problems, an adaptive modulation coding scheme is used for subjecting the control channel information to error correction coding processing, a predetermined coding scheme is used for modulation of the control channel information of error correction coding, the control channel information is transmitted, and the state is further set that the coding rate during error correction processing can be changed according to transmission states.

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. [...

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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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