Research on multi-interface and multi-channel Routing protocols for Channel Allocation and Path Selection

Wireless mesh network is a wireless multi hop mesh topology network, which is a very promising wireless network access technology. Multi interface multi-channel wireless mesh network can further release the performance of mesh network and make full use of RF resources. This paper proposes a multi- interface multi-channel routing protocol IAPDCA (Interference Avoidance Path Detection Channel Allocation) which combines path selection and channel allocation. IAPDCA protocol interacts real-time information between MAC layer and routing layer. Each node selects the channel with the lowest channel interference index on the target path, so as to reduce the channel interference and channel conflict of neighbor nodes. In the aspect of path selection, IAPDCA takes the physical interference model as the basis to select a path with the least interference as the target path to establish a route. Through the analysis and improvement of AODV protocol, the multi-interface and multi-channel scheme is added, and the algorithm proposed by IAPDCA protocol is deployed. The simulation results show that IAPDCA can effectively improve the network performance compared with the existing multi-interface multi-channel routing protocols.