An adaptive scrambling code allocation method for wcdma network

Abstract

The invention discloses a WCDMA network adaptive scrambling code allocation method, comprising steps: (1) constructing data tables of all cells and base stations; (2) for each base station, according to its distance to neighboring base stations, estimate the current Geographical environment information of the base station and its sub-district, and set the scrambling code multiplexing distance threshold of the base station according to the information; (3) Construct the scrambling code triplet and divide it into two parts: usable and reserved; ( 4) sort all base stations according to the predetermined principle, and assign available scrambling code triplets to each base station in sequence; (5) for each base station, it is feasible to perform scrambling code multiplexing according to its scrambling code multiplexing distance threshold To determine the reliability, if the base station repeats the code with the adjacent base station but the scrambling code multiplexing cannot be performed, then the scrambling code triplet of the base station is replaced. By adopting the present invention, appropriate scrambling code allocation can be made adaptively for scenarios such as dense urban areas, suburbs, rural areas, expressways, etc., and the allocation result has good user-friendliness.

Description

technical field [0001] The invention relates to wireless network planning in the communication field, in particular to an adaptive scrambling code allocation method for a WCDMA (Wideband Code Division Multiple Access) wireless network. 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. In the GSM system, limited by the number of frequency points, 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 constraints. constraint. But in WCDMA, the number of main scrambling codes is 512, and this number can be considered as sufficient allocation from a practical point of view. [0003] Whether it is GSM, TD-SCDMA or WCDMA,...

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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