Abstract: Long distance ad hoc network communication technology can be adopted to realize train-train communication for heavy-haul train. Based on TDMA principle, this paper establishes models aiming at the probability of frequent-point resource collision between one-hop nodes in ad hoc network, and puts forward the calculation method for air interface collision probability of heavy-haul railway MESH ad hoc network communication node. Through the key parameter setting, the system collision probability between one-hop nodes can be calculated, and by using Monte Carlo method, the statistical simulation verification in MATLAB will be performed, which have guiding significance to system design and engineering design optimization.

Key words: ad hoc network, air interface collision probability, railway communication

摘要： 重载列车车车通信可以采用长距离自组网通信技术实现。基于TDMA原理，针对自组网过程中一跳节点间频点资源碰撞概率进行数学建模，提出重载铁路MESH自组网通信节点空口碰撞概率的计算方法，通过关键参数的设置即可计算出系统一跳节点间的碰撞概率，利用蒙特·卡罗方法，在MATLAB中进行统计学仿真验证，对系统设计及工程设计优化均有指导意义。

关键词: 自组网, 空口碰撞概率, 铁路通信