重载铁路MESH自组网一跳节点空口碰撞算法

Air Interface Time Slot Collision Probability Algorithm of MESH ad Hoc One-hop Nodes on Heavy-haul Railway

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。

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 verifi cation in MATLAB will be performed,which have guiding signifi cance to system design and engineering design optimization.