贪婪转发策略广泛应用于水下无线传感网络UWSNs(underwater wireless sensor network)地理路由,但是,该协议存在数据包丢失严重以及在遭遇路由空洞时路由效率低下的不足.为此,提出了基于拓扑深度调整的贪婪地理路由协议的改进协议,记为GFTP.GFTP协议依据拓扑信息调整路由空洞节点的深度,将路由空洞节点移到新的深度,进而克服路由空洞.仿真结果表明,提出的GFTP协议有效地提高了数据包传递率,并降低了端到端的传输时延,与VAPR协议相比,数据包传递率提高了约43%、端到端传输时延降低了约68%.%Greedy forwarding is an important routing strategy among those routing protocols based on geography routing in underwater wireless sensor network (UWSNs).However, there are some problems of high-packet loss and low-routing efficiency in case of routing void.Therefore, depth adjustment based topology greedy geography routing was proposed in this paper, which was marked as GFTP.It provided a novel depth adjustment based topology control mechanism used to move void nodes to new depths to overcome the communication void regions.Simulation data results show that GFTP protocol has a good performance in terms of average end-to-end delay and packet delivery ratio.Compared with VAPR, packet delivery ratio of the GFTP protocol is improved by about 43%, and average end-to-end delay is reduced by about 68%.
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