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地铁无线通信系统中,安装在列车上的无线通信设备STA(站点)随着列车的快速移动而频繁地与轨旁的AP(访问点)进行切换,因此及时、准确地发现它们之间的拓扑结构成了网络管理的一个难点.针对这个难点,本文扩展STA中SNMP代理的trap发送机制,与不同的AP关联时,STA主动向管理站报告与AP的拓扑信息,同时管理站利用AdventNet SNMP提供的API接收该拓扑信息.实验测试结果表明,该机制能及时、准确地发现AP与STA之间的拓扑结构,对地铁无线通信系统的有效管理和维护提供了重要的保障.
In the metro wireless communication system, the wireless communication apparatus STA (station) mounted on the train frequently switches from the AP (access point) beside the track as the train moves rapidly, so that the topology between them is found in good time and accurately Structure becomes a difficult point of network management.In view of this difficulty, this paper extends the trap sending mechanism of SNMP agent in STA. When correlating with different APs, STA reports the topology information with AP actively to the management station, and the management station uses AdventNet SNMP to provide API to receive the topology information.Experimental results show that this mechanism can find the topology between AP and STA in time and accurately and provide an important guarantee for the effective management and maintenance of the metro wireless communication system.