| Summary: | The structure of railway catenary line is “long chain”. Considering each catenary as a wireless node, it will form the chain wireless network that solves the transmission problem of monitoring data on railway catenary line. Using token method to manage the distribution of channel resources can optimize the structure of “long chain”. The local system decomposes several subnet class units which consist of one or more nodes. Then the token is transmitted in denomination of subnet. The system structure is composed of multiple subnets connected in series, making the route more flexible. The network can self-repair and prevent system breakdown due to node failures. The stability of system will be enhanced. The monitoring data can be sent in parallel, and the network efficiency becomes higher. Using token as control information, nodes will not interfere with each other, thus achieving orderly utilization of the channel.
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