基于网络编码的转发节点协作多跳广播协议

Network coding-based cooperative forwarding multi-hop broadcasting protocol in VANETs

车载网VANETs的车间通信V2V为车间紧急消息的传递提供了平台。为此,提出了基于网络编码的转发节点协作广播协议NCFMB。NCFMB协议首先利用节点的距离、方向以及局部密度信息计算节点的竞争权值,并择优选择节点作为转发节点。然后,再利用网络编码技术,在广播数据包前对数据包进行编码,进而提高数据包传输率。最后,通过仿真数据表明,提出的NCFMB协议能够有效地提高数据包传输率,并降低了端到端传输时延。与FUZZBR协议相比,数据包传输成功率提高了近10%,而时延降低了近50%。

In Vehicle Ad hoc Networks（ VANETs）, Vehicle- to- Vehicle（ V2V） communication is able to transmit emergency message.Therefore, NCFMB protocol is proposed in this paper. In NCFMB, firstly, the distance between nodes, direction and local density are used to compute the contention weight of nodes. The node with max contention weight is considered to be forwarding node.Secondly, the data is encoded before broadcasting the data in order to improve the data transmission ratio. Finally, the simulation results show that proposed NCFMB protocol performs 10 % better than FUZZBR protocol in terms of data transmission ratio, and about 50 % in term of end- to- end delay.