Variable-power regulation access method for CDMA communication system

Abstract

The method of the present invention includes the receiving quality estimation in the base station to physical random accessed channel prefix of ascending receiving, the channel access of physical public grouping and collision detection prefix; the precise control of collision detection and power control prefix and message part emitted power; the precisely controlled sending of control command via descending capture indication channel, access prefix capture indication channel and collision detection / channel configuration indication channel; and sending by the user's equipment the message part of subsequent physical random access channel and the collision detection and power control prefix and message part of physical public grouping channel. The method can reduce the interference to other channel and raise system capacity.

Description

technical field [0001] The present invention relates to mobile communication system access, in particular to a variable power adjustment access method in a code division multiple access communication system, the method supports uplink Physical Random Access Channel (PRACH), Physical Common Packet Channel (PCPCH ) and downlink Acquisition Indication Channel (AICH), Access Prefix Acquisition Indication Channel (AP-AICH), Collision Detection / Channel Configuration Indication Channel (CD / CA-ICH). Background technique [0002] In the access technology of wireless communication, there is an access method based on quick indication. The incoming burst data can usually be divided into several parts, and the next part of the information is generally sent only after receiving a response (such as a capture response) to the previous part of the data. Usually this type of response has only two value 1, -1 or three value 1, -1, 0 responses. The indication of access allowed for successful ...

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Problems solved by technology

[0015] Therefore, only two indications 1 and -1 are captured for conflict detection, and no indication can be provided for finer control of the user equipment.

[0016] Since the power fluctuation range of the current physical random access channel (PRACH) and physical common packet channel (PCPCH) is very large, but there is only one indication that the acquisition is successful and the access is allowed, which will lead to using it as a power offset later The fluctuation range of information transmission power in the subsequent part of the benchmark is also very large, resulting in the decline of the entire access performance

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