Improved backup routing protocol of AODV based on PLC network

An improved backup routing protocol of AODV-AODV-IB was proposed and deployed in power line communication (PLC) network in order to reduce the delay of AODV routing reconstruction. The AODV-IB modified AODV-ABL and used Hello message to carry the backup routing information of destination node IP, serial number and hops. According to the principle of the shortest path and the regulation of avoiding backup routing loops, each node with the AODV-IB can get optimal backup routing information after cyclical exchange of Hello message. Each node with the AODV-IB can maintain primary routing and backup routing at the same time. Once the primary link breaks, it can be quickly recovered by using the backup routing. For the performance evaluation of the AODV-IB, a test-bed based on PLC network was constructed. Protocols of AODV-IB, AODV, AODV-BR, AODV-ABL and IBR-AODV were tested. Experimental results show that AODV-IB is vastly superior to other four protocols in the aspects of reducing the delay and improving the packet delivery ratio. AODV-IB is more suitable for the PLC network.