Method and device for controlling launching power of shared control channel

Abstract

The invention provides a method and a device for controlling launching power of a shared control channel, which is used for a shared control channel HS-SCCH, belonging to the technical field of telecommunications. The method comprises the following steps that: a base station sends resource scheduling information on an HS-SCCH channel to user equipment; whether the UE receives the resource scheduling information or not is judged; a judging result is obtained; and then, the launching power of the HS-SCCH channel is controlled according to the judging result. Through the method, the launching power of the HS-SCCH channel can be accurately judged whether to be proper or not, and on the basis of guaranteeing that the UE can correctly receive the resource scheduling information on the HS-SCCH channel, the interference of the HS-SCCH channel to other channels and adjacent cells in the same time slot can be effectively lowered so as to improve the system capacity and the system stability.

Description

technical field [0001] The present invention relates to the technical field of electrical communication, in particular to a method and device for controlling the transmission power of a shared control channel. Background technique [0002] HSDPA (High Speed ​​Downlink Packet Access) technology is a technology that provides high-speed downlink data services for multiple users, and can be used to meet the packet services with burst characteristics in the downlink, such as streaming data services and interactive applications. . [0003] Due to limited wireless resources, in order to meet the service rate requirements, shared channels HS-DSCH (High-Speed ​​Downlink Shared Channel, High-Speed ​​Downlink Shared Channel), HS-SCCH (Shared Control Channel) and HS-SICH are introduced in HSDPA (Shared Information Channel for HS-DSCH, shared information channel of HS-DSCH), and through technologies such as AMC (Adaptive Modulation and Coding, adaptive modulation and coding) and HARQ (H...

AI Technical Summary

Problems solved by technology

[0010] Since the HS-DSCH channel and HS-SCCH channel are shared by multiple users in HSDPA, the time interval for a single user to be scheduled may be relatively long, so the time interval for a single user to receive HS-SCCH will also be relatively long. According to the existing The transmission power control algorithm of the HS-SCCH channel, the transmission power control interval of the HS-SCCH channel will be relatively long, resulting in inaccurate transmission power of the Node B (base station) HS-SCCH channel

Especially when the user moves at a high speed, the path loss changes greatly after a period of time, and at the same time, the downlink time slot interference may also change greatly, and the HS-SCCH channel uses the long-ago TPC command word Inner-loop power control makes it impossible to accurately control the transmission power of the HS-SCCH channel. If the transmission power of the HS-SCCH channel is too high, it will cause great interference to other users, causing other users in the same slot or adjacent cells to The user's reception quality is reduced; if the transmit power of the HS-SCCH channel is too low, the scheduled user may not be able to correctly demodulate the information on the HS-SCCH channel, and the UE will not receive MAC-hs (Media Access Layer) PDU (Protocol data unit) data blocks, resulting in waste of system resources, and the user's service rate and cell throughput will be reduced

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