Method for allocating scrambling codes in self-adapting mode for a WCDMA network

Abstract

The invention discloses a method for allocating scrambling codes in a self-adapting mode for a WCDMA network, which comprises the following steps: (1) constructing a data table for all districts and base stations; (2) for each base station, estimating the geographical environment information of the current base station and the district managed by the current base station according to the distance between the current base station and an adjacent base station, and setting a scrambling code multiplexing distance threshold of the base station according to the geographical environment information; (3) constructing scrambling code triples, and dividing the scrambling code triples into available triples and reserved triples; (4) sorting all the base stations according to the a predetermined principle, and allocating an available scrambling code triple for each base station in sequence; and (5) for each base station, judging the scrambling code multiplexing feasibility according to the scrambling code multiplexing distance threshold of each base station, and if the base station has the same scrambling code with the adjacent base station but can not carry out scrambling code multiplexing, replacing the scrambling code triple of base station. The method for allocating scrambling codes in the self-adapting mode for the WCDMA network can be used for properly allocating scrambling codes in the self-adapting mode for scenes, such as dense urban areas, suburban areas, rural areas, highways and the like, and the allocated result has good user-friendly property.

Description

Technical field [0001] The invention relates to wireless network planning in the communication field, and in particular to an adaptive scrambling code allocation method for WCDMA (Wideband Code Division Multiple Access) wireless networks. Background technique [0002] The scrambling code planning in WCDMA is similar to the frequency planning in the GSM network, and its purpose is to ensure that the cells in the network do not interfere with each other. The GSM system is limited by the number of frequency points, and the frequency planning is often stretched, and it is difficult to find the optimal solution; similarly, the number of available scrambling codes in the TD-SCDMA system is also relatively small, and the scrambling code planning is also subject to more constraint. However, in WCDMA, the number of primary scrambling codes is 512, which can be considered sufficient from a practical point of view. [0003] Regardless of whether it is GSM, TD-SCDMA or WCDMA, the reuse dista...

AI Technical Summary

Problems solved by technology

However, these methods generally adopt a fixed distance relationship threshold, which lacks certain flexibility, and it is difficult to give appropriate scrambling code allocation results for scenarios such as dense urban areas, suburbs, rural areas, and expressways.

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