Reserch On Relay Clusters Mechanism And Routing Protocols In Wireless AD HOC Network

With the increasing of wireless communication services, the future demand and application for wireless network will be more and more intensive and diversified, and under the wireless network environment the users continue to surge, it makes the reliability and the security of data transmission become more and more low so that it will also become a major challenge to this trend, as to solve the above problems, the research on theory and application of wireless self organizing network demand will become more and more urgent. In this paper, in order to improve the relay selection and resource routing algorithm for wireless ad hoc network environment as the research content, the reliability safety transmission and data transmission between the users as the optimization objective; with cooperative communication, relay clustering technology, security capacity, time reversal technique, WCETT (Weighted Cumulative Expected Transmission Time)routing criterion as the theoretical basis, develop the study about the safety and reliability of wireless ad hoc networks.Firstly, the background and significance of the research are described, and the chapter structure of this thesis was arranged, and then the current wireless ad hoc networks relay clustering mechanism and routing algorithms are analyzed and summarized, based on the existing research, the main research contents of this article are brought out.In view of the existing wireless transmission between the throughput of network is lower and the node is not security, the third chapter proposes a scheme to safety relay cluster mechanism based on LEACH algorithm. In the current LEACH algorithms are analyzed and compared on the basis of the proposed a class of improved method, which introduces the concept of security capacity, taking into account the eavesdropper situation exists in reality, the introduction of safety capacity to improve the reliability of the transmission between nodes, considering the residual energy and the trust values of the nodes in the two sides, has been greatly improved to the original LEACH algorithm. The simulation results show that, the improved algorithm in the same network environment on the basis of LEACH, cluster head selection algorithm can effectively improve the survival period, anti-interference ability of network and inhibition of malicious nodes to the cluster head selection functions relative to the original LEACH algorithm.The routing protocol in wireless Ad hoc network environment existing in multiple channels, taking into account the real environment can improve the transmission rate, but would this problem increasing interference between nodes, in the fourth chapter, we propose a new routing time reversal technique based on TR-WCETT criterion. First carries on the analysis comparison to the existing wireless Ad hoc network in different types of routing protocols, and introduced to the improved MR-LQSR protocol, considering the MR-LQSR network environment, for inter node interference between channels is not very good solution, and then introduce a key technology of the time reversal technique, are introduced in detail. Application of the principle of this technology and wireless communication anti jamming. Finally, based on the WCETT criterion, introduced the TR technology, proposed a new routing selection criterion, improve routing reliability transmission. The simulation results show that, the improved MR-LQSR protocol based on TR-WCETT criterion based on the same network environment, effectively improve the system throughput and the reliability of data transmission.