“盲区”通信可靠性的优化模型与求解方法

Optimization model and solution method for communication reliability in dead spots

针对无线蜂窝网中存在信号难以到达的领域,即"盲区"通信的实际问题,提出了一种"盲区"通信可靠性的优化模型和求解方法.通过引入Ad Hoc网络来提高通信节点在进入该区域过程中的通信可靠性,根据移动节点的物理位置、移动速度以及邻接移动节点的关联因素,利用单点通信解决通信结点在进入"盲区"过程中(即存在中继区)的通信问题,再利用追击通信策略解决通信节点完全进入"盲区"(即不存在中继区)的通信问题,建立"盲区"通信可靠性优化模型,并利用遗传算法(GA)进行了仿真.仿真结果表明,此方法具有一定的可行性和有效性.

Aimimg at the pratical problem of communication in dead spots where signals are difficult to arrive in wireless cellular network,the optimization model and solution method for the communication reliability in dead spots were proposed.The Ad Hoc network was introduced to enhance the communication reliability of communication nodes in the process of entering the dead spots.Based on the physical location and moving velocity of mobile nodes as well as the correlation factors between adjacent mobile nodes,the single-point communication was used to solve the communication problem in the entering process of communication nodes into the dead spots.Then the pursuit communication strategy was applied to solve the communication problem when the communication nodes entirely entered into the dead spots.A communication optimization model in dead spots was established,and the genetic algorithm（GA） was used to perform the simulation.The simulation results show that the proposed method has definite feasibility and effectiveness.