Network coding-aware opportunistic routing protocol in wireless multi-hop networks
Zheng Gang · Journal of Tsinghua University(Science and Technology) · 2010
This paper presents a network coding-aware opportunistic routing protocol called NCAOR to overcome the inefficiency of COPE with passive coding.By integrating the advantages of both opportunistic routing and network coding,the protocol can achieve the efficient packet delivery.For one-hop forwarding,the node chooses multiple redundancy neighbors called opportunistic node set to assist the packet transmission.After reception,the opportunistic node uses the knowledge of local topology and neighbor reception information to judge the coding opportunity of the received packet.The node then uses the utility function to evaluate the forwarding utility of the packet in consideration of both the distance to destination and the network coding gain,and sets the forwarding time of the packet intelligently.Simulation results show that the protocol can provide larger throughput,lower energy consumption,and more network coding chances of nodes than the COPE which uses the shortest path routing protocol.