Research of a new underground wireless communication system
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摘要: 针对应急救援常用的救灾通信电话存在通信链路建立时间长、通话质量差、不能实时在线等问题，提出了一种基于Mesh多跳和跳频扩谱技术的煤矿井下无线通信系统的设计方案。采用骨干路由节点和中继路由节点相互配合构建Mesh多跳的基础结构，同时采用多射频多通道技术来提高多跳子系统的容量、多跳次数及覆盖范围；针对跳频扩谱通信链路中需要解决多频天线技术和异频无线路由技术的问题，采用改进型最小费用路由算法来确保在灾变后煤矿井下不确定性因素增强的情况下，无线传输选择最优路由链路。试验结果表明，该系统能够实时准确地将井下信息传送到地面救援指挥中心，且能够实现地面救援指挥中心与井下救护队员的直接对话和通信指挥，提升了应急救援能力。Abstract: In view of problems of long setup time of communication link, bad voice quality and unable for online existed in common rescue communication telephone for emergency rescue, the paper proposed a design scheme of underground wireless communication system based on Mesh multi-hop and FHSS. The scheme uses backbone routing nodes and relay routing nodes to build basic structure of Mesh multi-hop, meanwhile uses multi-radio and multi-channel technology to improve capacity, multi-hop times and coverage ranges of multi-hop subsystem. For solving problems of technologies of multi-frequency antenna and wireless routing with different frequency, the scheme uses improved minimum cost routing algorithm to ensure wireless transportation select the best routing link under condition of enhancing of underground uncertain factors. The test result shows that the system can send related underground information to surface rescue and command center, and can realize direct communication and communication command between surface rescue and command center and rescuer with higher ability of emergency rescue.
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