Research On Ad Hoc Network Adaptive Routing Technology Based On Network Situation Awareness

In wireless multi-hop networks,factors such as geographic environment,external interference,node movement,etc.will cause changes in the network situation.At the same time,different service types put forward different routing requirements,and a single routing mode cannot meet service requirements and cannot cope with network situation changes.The challenge.Therefore,this thesis designs and implements a complete set of multi-modal adaptive routing framework,which integrates multiple routing modes,and can make routing mode decisions based on business types and network conditions.In the multi-modal adaptive routing framework designed in this thesis,services are divided into two major categories: signaling services and data services,and the signaling reliable routing mode and the data service adaptive routing mode are designed respectively.In the signaling reliable routing mode,this thesis designs the signaling reliable distribution protocol,and in the data service adaptive routing mode,according to the different network forms,this thesis designs the MANET routing mode,intermittent interruption network routing mode and DTN routing mode.And designed a network situation awareness mechanism,which can adaptively switch the corresponding routing mode according to the perceived network situation.In the MANET routing mode,this thesis designs an adaptive transmission strategy,which can select a reasonable transmission method according to the path status in the MANET network,including multi-path redundant transmission,multi-path loadbalancing transmission and coded transmission.The intermittent interruption network routing mode is a supplement to the MANET routing mode.Considering that the MANET network is temporarily interrupted due to external interference or other factors,this mode will buffer the data packets that will be discarded due to the path interruption and wait for the path to recover and re-forward packet.In the DTN routing mode,this thesis designs an adaptive routing algorithm strategy,combining the advantages of the flooding-based routing algorithm and the routing algorithm based on probability estimation to realize the adaptive adjustment of the routing algorithm in DTN network communication.Based on the routing strategy and routing mode design of the adaptive routing framework,this thesis implements the adaptive routing framework,and designs a variety of experimental scenarios to conduct experimental tests on the multi-modal adaptive routing framework,and test various types of routing frameworks.Function and performance of routing mode.The test results show that the multi-modal adaptive framework can adapt to changes in different service types and network forms,and its performance is better than that of a single routing mode.