Research And Implementation Of Routing Technology In Multi-interface Multi-channel Wireless Multi-hop Networks

MANET(Mobile Ad-hoc Networks)has been widely used in military communications,temporary emergency communications and other fields because of its strong robustness and other characteristics.According to the node interface configuration,MANET can be divided into node interface isomorphic network and node interface heterogeneous network.With the application of MANET network more and more widely,simple interface isomorphism network has been unable to meet the demand,complex heterogeneous wireless ad-hoc network has become a research hotspot.Based on BATMAN-ADV(Better Approach To Mobile Ad-hoc Networking Advanced)routing protocol,this paper designs a fast sensing routing algorithm,the adaptive multi-interface multipath routing protocol and the routing protocol for network temporary interruption,and implement the above protocol.First of all,due to the instability of the MANET network link,it may cause dynamic routing changes.In order to reduce the response time of transmission path switching,this paper designs a fast route aware algorithm based on exponentially weighted moving average.When the node senses that the link quality changes,it can speed up the route convergence speed,reduce the routing delay,and improve the network transmission quality.At the same time,the algorithm can effectively prevent the network from sudden interference caused by link quality jitter to avoid routing shock.The simulation results show that the algorithm can effectively reduce the path switching response time and have better performance.Secondly,we design the adaptive multi-interface multipath routing protocol for heterogeneous networks of node interfaces.The design goal of this routing protocol is to make full use of the advantages of multiple network communication interfaces,and adaptively switch the transmission mode according to the network topology information,and make full use of multiple interfaces for simultaneous transmission and improve communication performance.The node obtains some network topology information by collecting OGM packets.In the process of routing,the nodes adaptively select the transmission modes such as multipath load balancing transmission,single-path transmission and multipath redundant transmission according to the path metric information of the destination node,improve the transmission throughput and end-to-end delivery rates.Thirdly,a routing protocol for temporary interruption of the network is designed for the temporary interruption of MANET network due to node movement and other reasons,this protocol combines DTN(Disruption Tolerant Networks)route with MANET route.Each node dynamically senses the network's on-off condition.When a temporary interruption occurs on the network,the MANET route is adaptively switched to the DTN route mode,and the packets that can not be routed are locally cached and managed.According to the real-time changes in the network environment,adaptively switch to MANET routing and forward the packet in the cache,in order to improve the reliability of transmission.Finally,we design and implement a multi-interface network routing protocol implementation platform,and test the function and performance of the proposed routing protocol.Experiments show that the adaptive multi-interface multipath routing protocol can effectively improve the throughput of nodes and improve the end-to-end delivery rate.routing protocol for temporary interruption of the networ can respond quickly to network interruption,manage packets efficiently and forward it,improve end-to-end delivery rates.