高效的动态按需时隙分配协议

摘要

A new slot assignment protocol for maritime wireless networks?on-demand random slot assignment ( DSRA) was proposed in this paper to solve the problem of reservation confliction and low efficiency. This protocol can assign different sluts randomly for every node according to the traffic load of the network nodes, but does not need any prior information about the concrete topological structure of network nodes in the process of assigning slots. Modeling analysis and simulation results show that even in a crowded network or under heavy load, the protocol can still make effective slot assignments and run the network efficiently. For complicated situations caused by the mobility and the change of service distribution, the protocol can provide superior adaptability, robustness, and extensibility.%针对时隙分配中的预留冲突和网络效率较低的问题,提出一种海上无线环境的高效分布式动态按需TDMA时隙分配协议——DRSA(on-demand random slot assignment protocol).该协议可以根据网络节点自身的业务负载情况,在两跳范围内随机地为各节点分配时隙资源,且在分配时隙的过程中无需任何有关具体网络拓扑结构的先验信息.模型分析和仿真结果表明:即使在拥挤网络环境下DRSA协议仍然能够保证信息时隙的有效分配,使得网络以较高效率运行；对于因节点移动、业务分布变化而引起的网络环境及网络规模变化,DRSA协议也具有较强的适应性、健壮性和可扩展性.