基于Hello机制的无线传感器网络路由优化

在不同网络拓扑稳定性的情况下，AODV协议都会产生一个固定的协议开销，占用网络带宽。针对该问题，提出一种自适应时间间隔发送Hello消息以达到功率控制、提高网络带宽、减小收敛时间的方案。该方案根据网络拓扑的变化缓急自动调整时间间隔发送Hello消息。仿真测试表明，在其他条件相同的情况下，使用自适应时间间隔发送Hello消息的机制能更合理地利用网络带宽，优化网络性能。

Routing Optimization of Wireless Sensor Network Based on Hello Mechanism

This paper analyzes the shortcomings of fixed protocol expenses that occur under network topologies with different degrees of stability for Adhoc On-demand Distance Vector(AODV) protocol which occupy network bandwith. It puts forward a method to transmit the Hello message through the auto-adapted time-lag to control the power, to enhance the network bandwidth, and to reduce the convergent time. This algorithm transmits the Hello message by adjusting time-lag automatically according to the change emergency of the network topology. Simulation tests indicate that on the same premise of other conditions, network bandwidth is more reasonably used and network performance is optimized by applying auto-adapted time-lag to transmit the Hello message.