UWSNs中基于深度调整的混合型路由协议

Hybrid routing protocol based on depth adjustment in underwater wireless sensor networks

现有基于地理路由的水下无线传感器网络数据传输协议经常出现通信空闲区域,导致报文投递率较低、能耗较高等不足,为解决这一问题,提出一种基于深度调整的混合型路由协议(GEDAR),采用地理路由和机会路由进行协作来提升网络数据报文投递率。对水下报文投递概率进行估计,采用贪婪机会型转发策略确定用于报文传输的下跳转发节点集合,通过基于深度的拓扑控制将空闲节点移到新的深度,实现通信空闲区域上的通信修复。仿真结果表明,GEDAR协议在报文投递率及每个报文的延时和能耗方面,均优于其它基准路由协议。

The existing data transmission protocols based on geographic routing in underwater wireless sensor networks often raise communication-void regions,resulting in low packet delivery rate and high energy consumption.To solve this problem,a hybrid routing protocol based on the depth adjustment（GEDAR）was proposed,which used the geographic routing and the opportunistic routing to improve the packet delivery ratio.The underwater packet delivery probability was estimated,and the greedy opportunistic forwarding was used to determine the next hop node set for transmitting packets.Through the topology control based on the depth,the idle nodes were moved to new depth,achieving communication repair in the communication-void regions.Simulation results show that GEDAR outperforms the baseline routing protocols in terms of packet delivery ratio,latency and energy per message.