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这里主要讨论了GSM系统在铁路覆盖场景下LAC边界小区SDCCH(独立专用控制信道)性能问题。通过SDCCH信令信道的原理、普通优化方法,延伸到针对铁路的SDCCH分流理论,总结出铁路覆盖小区的SDCCH话务分担流程,并提出特殊场景的覆盖和SDCCH容量解决方案。最后以一个应用实例举证了该理论的实际可操作性和相应的应用效果,给出应用前后对比。对GSM网络优化中特殊场景的SDCCH拥塞问题处理和后期网络优化具有很大的借鉴和指导意义。
This paper mainly discusses the performance problems of SDCCH (Independent Dedicated Control Channel) in the LAC border cell of the GSM system under the railway coverage scenario. Through the principle and common optimization methods of SDCCH signaling channel, it extends to the theory of SDCCH offloading for railway, and summarizes the SDCCH traffic sharing process in railway coverage area and proposes special scene coverage and SDCCH capacity solution. Finally, an application example is given to prove the practicality of the theory and the corresponding application effect, and the comparison before and after the application is given. It has great reference and guiding significance to deal with SDCCH congestion problem in the special scene in GSM network optimization and later network optimization.