| Wireless Sensor Network (WSN) is made up of a large amount of micro-sensor nodes with thecharacteristic of Multifunction, low-energy, low-cost, which are deployed in the surveillance area.Sensor nodes transmit information by self-organizing wireless communication, cooperate to completea necessary task. WSN can collect and process real-time environmental information, like temperature,humidity, seismic waves, sound, then forward the results to the users. It has been widely appliedbecause of its flexible-deploy, low-cost, advantages to expand, etc.While the energy of sensor node is quite limited, it is the most important focus for WSN that howto efficiently utilize network node energy and extend network lifetime. As a application-orientednetwork, with intensive application, it is necessary to provide support for QoS. The existing QoSrouting protocol mostly concerns about one of the parameters, especially extends the network lifetimeby reducing the energy consumption.Based on the domestic and abroad researches, QoS routing protocol for WSN are investigateddeeply in this thesis. The research finds and innovation are mainly indicated on two aspects asfollows:(1) With the merits of easy to management and better scalability, hierarchical routing protocol isone of the research hotspot in WSN. After analyzed LEACH and its related protocols, in this paper,we proposed a uniform clustering algorithm for LEACH (LEACH-UC), to improve the performancecluster formation and the selection of cluster head. The algorithm uses a fixed cluster radiuscontrolled the distribution of cluster head in the network. After clustering, the algorithm selects thecluster head through the cluster head consultation and adjustment mechanism. Simulation resultsshows that the algorithm can distribute the cluster head uniform, as well as balance the energyconsumption of network nodes, then extend network lifetime.(2) At the same time, a Secure Multipath Routing Protocol (SMRP) is presented in this thesis forsolving the problems which exist in current routing protocol. Similar to the client/server (C/S), thework mode makes full use of the superiority of Sink node, completes the selection and maintenance ofrouting. The simulation shows that the SMRP has good performance in throughput, control energyconsumption, and network lifetime. |
