| The rapid development of wireless sensor network in military applications,medical and health,social transportation and other fields has brought great convenience to people's production and life.However,most wireless sensor nodes are powered by batteries,the whole wireless sensor network is energy limited.Therefore,the design of efficient routing protocols is an important topic in wireless sensor networks.In addition,the rapid development of CTC(cross technology communication)technology makes it possible for different types of wireless node communication to coexist.However,the existing routing protocols are not well adapted to the network where multiple sensor nodes coexist,and the improvement of energy efficiency and network throughput,network load balance and other aspects still need to be improved.Therefore,it is of great significance to study the routing protocol based on CTC heterogeneous network.In this thesis,aiming at heterogeneous wireless sensor networks based on CTC technology,in order to improve the energy utilization efficiency of nodes,increase the network throughput and prolong the network life cycle,the energy efficient one-hop fuzzy clustering routing protocol named Fuzzy-k and multi-hop routing protocol named MFuzzy-k are proposed respectively.Fuzzy-K protocol fully considers the characteristics of heterogeneous network with coexistence of multiple sensor nodes,and makes corresponding design for the differences in frame length and mobility.Different from other traditional protocols,which first select the cluster head and then cluster nearby,k-means clustering algorithm is introduced to cluster nodes.The proposed protocol fully considers the location and distribution of nodes to cluster,so as to make the formation of clusters more balanced.At the same time,Mamdani fuzzy reasoning system is adopted to reasonably avoid the defects of the initial clustering center and cluster number of k-means algorithm.The Mamdani fuzzy reasoning system is used again to select the cluster head,and the final cluster head was selected by considering the remaining energy of the node,the distance between the node and other nodes in the cluster,and the selection history of the node.Through the simulation experiments of three different network topologies,it is compared with the classical LEACH protocol,heterogeneous network protocol EEHCCP,TEAR,and Fuzzy unequal clustering protocol DUCF,and it is shown that Fuzzy-K protocol can obviously prolong the network life cycle,balance the network load,and increase the network throughput.Multi-hop routing protocol MFuzzy-K is proposed based on Fuzzy-K protocol for data transmission in steady phase.In the network setup phase,the clustering method and cluster head election mechanism of the protocol are the same as Fuzzy-K protocol.In the steady-state transmission phase,the nodes suitable for direct communication with the base station adopt one-hop transmission mode to send packets directly to the base station.For other nodes,ant colony algorithm is used to construct the optimal forwarding path to adopt multi-hop transmission.The experiment shows that the communication energy consumption between the node and the base station is further reduced,the energy utilization efficiency of the nodes is improved,and the life cycle of the whole network is effectively extended. |
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