高速环境下GSM-R小区广播性能研究

Research of Broadcast Performance of GSM-R Cell in High-speed Environment

结合GSM-R小区广播系统架构、协议体系结构、小区广播消息格式和消息流程,研究小区广播在高速环境下的性能。基于实验室GSM-R小区广播测试平台和现场测试情况,对小区广播传输时延、传输速率和丢包率进行测量和分析。得出结论:时延主要由信息处理和信息传输决定,通常由信息长度决定;高速运行、小区重选、干扰都会对丢包率产生影响。小区广播单独占用一个SDCCH信道,不对其它无线通信业务造成影响。

Combined with the architecture of GSM-R cell broadcast system,the architecture of protocols,cell broadcast message formats and messaging processes,we study the performance of cell broadcast under high-speed environment.Based on the test platform of GSM-R cell broadcast in our laboratory and the results of test on site,the transmission delay,transmission rate and packet loss rate of cell broadcast are measured and analyzed.It was concluded that the delay is mainly determined by data processing and data transmission,usually determined by the length of the data.High speed,cell re-election,interference will affect packet loss rate.Cell broadcast occupy a SDCCH channel exclusively and cannot affect other services of wireless communication.