基于LTE和WiFi混合组网的综合承载研究

Study on comprehensive carrying based on LTE and WiFi hybrid network

为提高车地无线通信系统抗干扰性能,增强综合承载业务传输能力并验证其在LTE与Wi Fi混合组网环境下的适应性,在郑州市轨道交通2号线上进行以CBTC业务为核心的综合承载测试。测试结果表明,在LTE网络环境下,在保障CBTC业务高可靠性传输的同时,能够为IMS和PIS等业务提供有效的传输通道;在LTE和Wi Fi混合组网的环境下,使用专用车载终端可完成LTE网络和Wi Fi网络之间的无缝切换,从而保证CBTC业务的高可靠性传输。

To improve the anti-interference performance of train and trackside radio communication system,enhance the comprehensive carrying service transmission,verify its adaptability of LTE and WiFi hybrid network environment,this paper discuses the comprehensive carrying tests with CBTC as the core business on the Zhengzhou metro line2.The test results show that it can provide efficient transmission channels for IMS and PIS services in the LTE network environment while ensuring the high reliability transmission of CBTC services.In the environment of LTE and WiFi hybrid networks,seamless switching between LTE networks and WiFi networks can be accomplished by using dedicated train-carried terminals,thus ensuring high reliability of transmission of CBTC services.