一种新的基于部分网络编码的机会路由机制

网络编码能够提升无线网络传输性能,网络中的节点若采用传统的全网络编码,必须等待所有的数据包到达后才能进行解码,而这将造成网络的延迟。通过将部分网络编码和机会路由相结合,提出了一种新的路由协议(ORoPNC),该协议可以降低网络编码延迟,提高网络的稳定性。同时,设计了一种新的转发策略——ETXoEC。在这一策略下,转发节点的选取决定于当前链路状态和节点的剩余能量。仿真结果表明,网络的延迟降低了25%左右,能量消耗也得到了较好的平衡,整个网络的稳定性得到进一步提高。

A New Opportunistic Routing Mechanism Based on Partial Network Coding

The network coding can improve the wireless network transmission performance.The network nodes using the traditional full network coding have to wait the arrival of other data packets for coding, which increases the network delay.This paper proposes the ORoPNC（ Opportunistic Routing based on Partial Network Coding）protocol, which combines partial network coding with opportunistic routing to decrease the network delays and improve the network stability. Meanwhile,a new forwarding strategy--ETXoEC is designed, and the forwarding node is selected according to current link status and node residual energy during designing candidate set for forward- ing.The simulation results show that the network delay can be reduced by about 25% .The energy consumption of network nodes can be well balanced by using ETXoEC forwarding strategy,and the network stability can be further improved.