多路径网络编码的传输可靠性提高策略

为了提高无线传感器网络的传输可靠性,提出在中间节点选择性编码的多路径传输策略.该策略建立从源节点到汇聚节点的相交多路径,并在源节点对数据包进行编码后沿多路径传输,中间节点接收并转发编码包.如果中间节点是簇首节点,则需对数据包重新编码后再发送给下一跳节点.解析计算了路径的传输可靠性和标准化能耗,并对所提传输策略下的网络传输可靠性和能耗进行仿真.结果表明,所提策略使得网络的传输可靠性有所提高,而且能量有效性得到大幅改善.

Transmission reliability enhancement strategy based on multi-path network coding

In order to improve the transmission reliability of wireless sensor network (WSN), a new kind of transmission strategy is proposed. Based on multi path and network coding, braided multipath to sink node are established for source node. The strategy encodes the packets at source node and transmits encoded packets on the established paths. Intermediate node is responsible for forwarding received packets. If intermediate node is a cluster head, it will recode the received packets and then transmit the encoded packets. Analyze, compute and simulate transmission reliability and energy consumption of WSN with the proposed strategy. Simulation results show that the strategy can improve transmission reliability and energy efficiency of WSN when compared with traditional multi path method.