Transmission power control method, mobile station and radio network controller

Abstract

A transmission power control method for controlling transmission power of an enhanced dedicated physical data channel for transmitting uplink user data, includes: storing, at a mobile station, a reference transmission format including a transmission data block size which is used in the enhanced dedicated physical data channel, and a gain factor which is a transmission power ratio between the enhanced dedicated physical data channel and a dedicated physical control channel or which is a transmission wave amplitude ratio between the enhanced dedicated physical data channel and the dedicated physical control channel, calculating, at the mobile station, a gain factor of a normal transmission format based on the transmission data block size and the gain factor of the reference transmission format and the transmission data block size of the normal transmission format, and controlling, at the mobile station, a transmission power of enhanced dedicated physical data channel based on the gain factor of the reference transmission format or the normal transmission format.

Description

[0001] Cross References to Related Applications [0002] This application is based on, and claims priority from, prior Japanese Patent Application No. P2005-056631 filed on March 1, 2005; the entire contents of which are hereby incorporated by reference. technical field [0003] The invention relates to a transmission power control method, a mobile station and a radio network controller for controlling the transmission power of an enhanced dedicated physical data channel for sending uplink user data. Background technique [0004] In a conventional mobile communication system, in an uplink from a mobile station UE to a radio base station Node B, the radio network controller RNC is configured to consider the radio resources of the radio base station Node B, the amount of interference in the uplink, the mobile The transmission power of the station UE, the transmission processing performance of the mobile station UE, the transmission rate required by the upper layer application,...

AI Technical Summary

Problems solved by technology

Therefore, in the conventional mobile communication system, there is a problem that it is difficult to perform fast control (for example, about every 1 to 100 ms) on the change of the signal transmission rate due to processing load, processing delay, etc.

[0008] In addition, in the traditional radio network controller RNC, there is still such a problem: even if it is possible to perform fast control of the channel transmission rate change, the cost for implementing the device and the cost of operating the network has also increased significantly

[0032]Due to the above reasons, there is a problem that the reference transmission format must be strictly provided, otherwise when transmitting using a transmission format with a relatively large transmission data block size, would use an excessively large gain factor

[0033] In other words, there is a problem that because many reference transmission formats are set, the number of control signals increases, hardware complexity increases, test operations increase, and system operation increase

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