Research On Intelligent Optimized Routing Protocol For Hybrid Wireless Mesh Networks In Coal Mine

Hybrid wireless mesh network has advantages of large network capacity,strong robustness and simple network construction.It is suitable for communication network in special areas and emergency scenarios in coal mine.The network has characteristics of long chain topology,many kinds of data and limited energy.Aiming at those characteristics,two routing protocols based on intelligent optimization method have been proposed in this paper.(1)Physarum-inspired multi-parameter adaptive routing protocol.The protocol drawing the network parameters into Poisson's equation of Physarum-inspired autonomic-optimization model to measure the quality of link and implements two adjustment strategies to make protocol more adaptive and has achieved distributed routing decision.The strategies include the resource depended adjustment and the position depended adjustment.The protocol makes the energy consumption problem prominent when lacking of energy and reducing load pressure of key nodes in manyto-one data transmission scenarios.(2)Fuzzy-logic-based data-differentiated service supported routing protocol.The protocol divides the data into emergency data and regular data.According to different data types,the protocol can choose suitable multi-parameters and rules separately to make optimized routing decisions and provide differentiated services to meet the different transmission requirements.In addition,a path soft handoff strategy has been proposed to maintain continuous data transmission and improve the network performance when the path quality deteriorates.Based on NS2 platform,this paper tests the performance of the two protocols and compares them with the related protocols.The results show that the two routing protocols proposed in this paper can efficiently improve the quality of service such as average end-to-end delay and delivery ratio,and prolong the lifetime of network.The protocols achieve load balancing and energy balancing of the network,meet the transmission requirements of different types of data,and improve the efficiency of data transmission.