Research on Data Transmission Schemes for Wireless Multimedia Sensor Networks

• Main Authors: Bo-Yi Li, 李柏逸
• Other Authors: Po-Jen Chuang
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/24676193528691292859

博士 === 淡江大學 === 電機工程學系博士班 === 100 === Wireless multimedia sensor networks have been widely discussed in recent years because there are many potential applications, and how to increase the throughput in constrained environments has become the main challenge. Multipath routing is a promising solution because it can improve the channel utilization rate, reduce transmission delay, and balance the transmission load, but the efficiency will be limited if we construct the paths without taking the characteristics of wireless environments and sensor networks into consideration. In this thesis, we first explain the characteristics of data transmission schemes in wireless multimedia sensor networks, and then analyze the pros and cons of multipath routing, especially the problem of inter-path interference. After discussing the related works about routing schemes, we propose a Geographic Energy-Aware non-interfering Multipath (GEAM) routing scheme which can keep high performance through harsh sensor network environment. The proposed scheme divides the whole network topology into many districts, and in the same time forwards data through districts that won’t interfere with others, to achieve interference-free transmissions. We also adjust the load and boundary of each district according to the energy and location information of nodes in that district. Our scheme does not construct fixed paths in advance and can keep high performance even though the network topology changes rapidly. In the simulation we show that proposed scheme achieves high performance for real-time transmission and can evenly distribute the transmission loads to most of nodes in the network.