DiffServ-based Network Coding Protocol in Heterogeneous Wireless Sensor Networks
Lei Cao · 2012
By combining multiple packets in a single broadcast transmission,network coding can greatly improve the capacity of multi-hop wireless networks.This paper proposed a diffserv-based network coding protocol(DBNC) for hetero-geneous wireless sensor networks.The main idea is to compute periodically the mean and standard deviation of resi-dual energy of nodes,together with a dynamic node classification.On this basis,the QoS requirements are mapped to network coding metrics.For this purpose,we introduced an energy-aware forwarding mechanism for coded-packet.Meanwhile,a multi-priority packet scheduling strategy was designed to increase the opportunities for coding.Our simulation results demonstrate that DBNC achieves a significant improvement in energy efficiency,as well as in reliability of data transmission.