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Energy-Balanced And Delay-Reduced Data Gathering Protocol For Wireless Sensor Networks

Posted on:2011-10-18Degree:MasterType:Thesis
Country:ChinaCandidate:Z Y LuoFull Text:PDF
GTID:2178360305994620Subject:Information and Communication Engineering
Abstract/Summary:PDF Full Text Request
Wireless Sensor networks(WSNs) which consist of numerous small size, low cost, and flexibility dispenser sensor nodes form by way of self-organization. As a front research area of WSNs, it is currently the attention of international arena. Its main function is to collect and manage information of environment monitored. The energy of sensor node is very limited, this reduces the lifetime of wireless sensor networks. Therefore, how to use the energy efficiently and then extending network's lifetime become the main research questions. At the same time, for some real-time demanding applications, it should collect event data as soon as possible in order to make people respond to the incident in time.To solve the problems described above, this thesis investigates these issues in wireless sensor networks for data collection protocol, and proposes a mobile data gathering protocol for large-scale wireless sensor networks. The basic ideas of the protocol are:devide the networks into many same size grid, and select the sensor node whose residual energy is the biggest one as gird head and the gird head collects data of the common nodes. Grid head fuses the data using the spatial correlation to reduce the amount of data, then sends data to the agent node. The mobile sink traverses in the entire network to upload the sensed data from agent nodes. In order to reduce the length of path in which the mobile sink traverses the network, the solution of ant colony optimization (ACO) is used, which ensures the mobile sink always choose the shortest path to walk through the network.Simulation results demonstrate that the proposed data collection protocol has a significant advantage in extending the network life time, balancing network energy and reducing data transmission delays.
Keywords/Search Tags:wireless sensor networks, data gathering, mobile sink, agent node, ant colony optimization
PDF Full Text Request
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