6LoWPAN中route-over分片转发策略的改进

6LoWPAN使得在无线传感网络上进行基于IPv6的数据传输成为可能, 它定义了route-over和mesh-under两种路由策略. 针对传统的route-over策略在分片转发中存在的问题, 提出了基于虚电路的route-over分片流水转发策略, 详细介绍了该改进策略的详细设计, 即根据第1个分片的IP压缩头部信息建立后续分片的转发映射. 仿真实验结果表明, 改进的策略较原始策略在网络传输和时延上有更好的表现.

Improvement on Route-over Forwarding for IP Fragmented Packets in 6LoWPAN

6LoWPAN enables the IPv6 communication over Wireless Sensor Networks, which defines two routing strategies: mesh-under if the layer concerned is adaptation layer and route-over if the network layer. To address problems in route-over forwarding for IP fragmented packets in 6LoWPAN, this paper proposes an improved route-over strategy based on virtual circuit which enables fragments forwarding in pipelined manner, and presents the design of the improved strategy which create a forwarding mapping for subsequent fragments based on IP compression header of the first fragment. The experiments show that the improved strategy proposed in this paper perform better than original one in transmission and time delay in dealing with IP fragmented packets.