Method Research And System Realization Of Analysis And Optimization On GSM Co-channel And Adjacent Channel Interference

Because of the shortage of the GSM network frequency planning methods based on mobile measurement report, there is some co-channel and adjacent channel interference in the result, which need check and optimization. For automate the check and optimization of co-channel and adjacent channel interference, this paper proposes a new intelligent method of analysis and optimization on co-channel and adjacent channel interference in GSM network.This new intelligent method is based on the cells' configuration information. An interference evaluation model is obtained from the analysis of various factors including the base station layers and the azimuth relation. The base station layers are got from Delaunay triangulation algorithm and the judgment criterion of graph connectivity based on adjacent matrix. The azimuth relation is got from analysis of relative bearing. With this model, the interference performance of each frequency can be evaluated, the problem frequencies can be checked out, and the best optimization scheme can be calculated and applied.This method does not rely on the measurement data to avoid the impact of its accuracy, but introduces the concept of cell layer to approach the actual situation. It has been verified by the practical application that the method is simple, efficient and accurate.