移动Ad hoc网络基于链路质量的地理位置路由协议

基于地理位置的路由算法要周期性发送信标报文,以维护邻居节点的位置信息。但是频繁广播信标控制包会占用大量的网络带宽,于是近几年提出了基于竞争机制的无信标路由算法来减少控制开销。然而,大部分路由协议没有考虑到实际无线信道的不可靠性,使其在实际应用中表现不理想。提出了一种基于链路质量的地理位置跨层路由协议(LQBGR)。它利用跨层技术,在竞争机制中充分考虑链路质量因素,通过选择通信质量较好的链路来减少重传,提高整体网络性能。最终仿真结果表明,该协议能够达到较高的数据包投递率、较短的端到端延迟及较低的通信总量。

Link-quality Aware Beacon-less Geographic Routing Protocol for Mobile Ad hoc Networks

Geographic routing algorithms require nodes to periodically transmit HELLO messages to allow neighbors get their positions (beaconing mechanism). But periodically transmitting the messages will result in high bandwidth overhcad. For this reason, beacon-less routing algorithms have been recently proposed to reduce the control overhead.However, existing beacon-less algorithms don't consider unreliability of realistic physical channels. In this paper, a novel beacon-less routing protocol called I_QBGR was presented. Based on cross-layer routing technology, its design takes link quality into account to reduce the retransmission and enhance the performance. Simulation results show that LQBGR achieves higher packet delivery ratio, shorter end-to-end delay and lower traffic.