一种新的三维FANETs跨层自适应广播协议

A Novel Adaptive Cross-layer Broadcasting Protocol NABP for Three-dimensional Flying Ad Hoc Networks

针对盲目广播带来的广播风暴问题,该文提出一种新的3维FANETs自适应广播协议NABP。NABP应用跨层设计的方法,在维持原有协议层间结构分离的基础上,允许路由层共享MAC层的接收信号强度信息,并根据转发分组时增加通信范围计算出转发概率,倾向于让增加通信范围大的节点以高概率转发分组,从而减少了分组在网络中的重复传输,降低了节点间的竞争和碰撞,提高广播效率。NS-2仿真结果表明:与flooding+802.11和fp-flooding+802.11协议相比,NABP提高了转播节省率、减少了平均端对端延迟和平均丢包率。

To alleviate the broadcast storm problem caused by blind flooding, a Novel Adaptive Broadcasting Protocol （NABP） for three-dimensional Flying Ad hoc NETworks （FANETs） is proposed. NABP adopts the cross-layer design, which lets routing layer share the received signal power information at MAC layer while still maintaining separation between the two layers. The additional transmission range that can benefit from rebroadcast is calculated according to the received signal power, which is applied to dynamically adjust the rebroadcast probability. NABP reduces the redundant retransmission and the chance of the contention and collision among neighboring nodes in the networks. The simulation results demonstrate preliminarily that NABP improves the saved rebroadcast and reduces the average end-to-end delay and the average number of packet loss per node at the expense of a little throughput, which all compare NABP with flooding＋802.11 and fp-flooding＋802.11.