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针对B城市“TD-GSM系统间CS域切换成功率”指标恶化的问题,从终端侧和网络侧两个方面分别着手进行研究,首先定位出了K终端本身不符合3GPP协议规范是造成指标恶化的根本原因,推动终端厂家对该款终端进行了软件升级,之后又对网络侧进行了详细分析,提出简单有效的方案,解决了已经投放到市场的问题终端无法从TD网络切换到GSM网络的问题。
Aiming at the problem that the index of “CS domain handover success rate between TD-GSM systems” is deteriorating in B city, we study separately from the terminal side and the network side. First we locate that the K terminal itself does not conform to the 3GPP protocol specification. The root cause deteriorating indicators to promote the terminal manufacturers to the terminal software upgrades, and then conducted a detailed analysis of the network side, put forward a simple and effective solution to the problem has been put on the market terminal can not switch from the TD network to GSM Network problem.