A New Algorithm of GSM Co-Channel and Adjacent Channel Interference Optimization

  • Lina Lan
  • Xuerong Gou
  • Wenyuan Ke
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 113)


Most current methods of GSM frequency planning evaluate interference and assign frequencies based on the measurement reports. The same or adjacent frequencies are assigned to cells close to each other which cause co-channel and adjacent channel interference, and reduce the network performance. The traditional method to check and allocate the new frequencies is by man power which costs much time and the accuracy is not satisfied. This paper proposes a new intelligent algorithm of analysis and optimization on co-channel and adjacent channel interference based on the cells basic configuration information. The algorithm defines an interference evaluation model analyzing various factors such as the base station layer, the azimuth ward relationship, the cell neighborhood relationship, etc. The interference performance of each frequency can be evaluated and the problem frequencies can be optimized. This method is verified by a large number of actual datasets from an in-service GSM network. Contrast with the traditional method, this method demonstrates advantages in intelligence, accuracy, timeliness, and visualization.


GSM frequency optimization Co-channel and adjacent channel interference Interference evaluation model Base station site layer Azimuth ward Neighborhood relationship Triangulation 


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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  1. 1.School of Network EducationBeijing University of Posts and TelecommunicationsBeijingChina

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