基于网络编码的转发节点协作多跳广播协议

摘要

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 .