基于层级的水下传感器网络自适应地理路由协议

Level-based adaptive geo-routing for underwater sensor network

针对水下传感器网络(UWSN)需要专门的路由协议满足适应性、鲁棒性、高能效和能量均衡等要求,提出了基于层级的UWSN自适应地理路由协议LB-AGR,不同流量采用不同路由决策,根据节点层级、剩余能量、节点密度和位置信息,为候选下一跳节点计算复合转发因子,从而确定最佳路由,并将上行流量单播传送,减少了碰撞和能耗。仿真表明,LB-AGR在降低能耗、缩短端到端延时的同时,延长了网络生存期。

Underwater sensor network （UWSN） calls for specialized routing protocols to address adaptability, robustness, energy efficient and balanced energy-consuming. This paper proposed level-based adaptive geo-routing（LB-AGR） protocol in which traffics were divided into four categories, and routed different types of traffic in accordance with different decisions. It forwarded traffics upstream to sink unicast to the best next-hop instead of broadcasting to all neighbor nodes as in present UWSN routing protocols. It used an integrated forwarding factor to determine the best next-hop from multiple qualified candidates based on available energy, density, location, and level difference between neighbor nodes. The simulations show that LB-AGR can prolong the lifetime of the whole networks greatly by reducing and balancing energy consumption. Moreover, the end-to-end delay is also shortened under different environments.