Scrambling code optimization method for wideband code division multiple access (WCDMA) network

Abstract

The invention provides a scrambling code optimization method for a wideband code division multiple access (WCDMA) network. The scrambling code optimization method for the WCDMA network comprises the following steps of step 1: selecting a to-be-optimized same scrambling code adjacent region chain, calculating probability P (A) of occurrence of scrambling code conflict between a head cell and a tail cell in the same scrambling code adjacent region chain; and step 2: optimizing primary scrambling codes of the head cell when the P (A) is larger than 0, namely selecting the smallest scrambling code which enables the probability P (A) of occurrence of scrambling code conflict between the head cell and the tail cell to be the minimum in all available scrambling codes as a new scrambling code of the head cell. The scrambling code optimization method for the WCDMA network has the advantages of being capable of alerting risks of conflict of the scrambling codes, capable of optimizing the scrambling codes in a WCDMA network in actual operation, free from the need of foreground drive test or manual analysis, capable of being entirely accomplished backstage by using a computer, capable of accurately locating a cell where the conflict of the scrambling codes occurs, and only needing to optimize a cell which causes the conflict of the scrambling codes without having any effect on scrambling codes in other cells.

Description

technical field [0001] The present invention is applied in the third-generation mobile communication WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access) system, each cell in the WCDMA system needs to be assigned a designated scrambling code as a cell identification mark, and the present invention relates to WCDMA A method for optimizing cell scrambling codes of the system. Background technique [0002] Each cell in the WCDMA system needs to be assigned a scrambling code as a cell identification. Since there are 512 scrambling codes in the WCDMA system, a large number of cells need to use the same scrambling code. In order to ensure that the cells using the same scrambling code do not interfere with each other, The cell that reuses the scrambling code must ensure a long enough multiplexing distance, so that it is impossible for the mobile terminal to receive signals from two cells with the same scrambling code at the same time. In the early...

AI Technical Summary

Problems solved by technology

[0012] In order to solve the problem that the scrambling code optimization method of the existing WCDMA network cannot provide early warning of the risk of scrambling code conflicts, and cannot perform scrambling code optimization when scrambling code conflicts occur when the network is in actual operation, it needs to be located through front-end drive testing and manual analysis Scrambling code problem, the present invention provides a kind of scrambling code optimization method of WCDMA network

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