On Reliable Transmission by Applying Network Coding in Wireless Sensor Network
Date Issued
2008
Date
2008
Author(s)
Li, Ting-Ge
Abstract
Wireless sensor network(WSN) has been widely used in many applications, e.g.,environment and habitat monitoring, health-care application, traffic control, or wildcological survey. Due to scarce resources like energy, computational capability and storage space in a sensor node and rapid change in wireless link characteristics suchs signal strength, interference, and multipath propagation, how to provide a reliable data transmission in WSN while prolonging the network lifetime as long as possible is an important and challenging issue, which is the focus of this work. n general, there are several end-to-end approaches, e.g., automatic repeat request, multipath routing and forward error correction coding, used for provision of reliable data transfer in a wireless sensor network. We note that the overhead and performance of such end-to-end fixed-routing approaches are often dominated by some poor-quality links or nodes on the path. This could result in quick degradationn performance, adding too much redundancy data, spending many efforts in route maintenance. That is, these traditional approaches are not able to quickly and properly react in this multihop wireless environment. To cope with the above issues,n this work we would like to propose an efficient reliable data transfer scheme for a wireless sensor network. In other words, the goal of our scheme is to guarantee the reliability in data transmission, to add redundancy data as less as possible, and to self-adapt to the time-varying network environment. Hence, we propose a height-basedata-centric routing structure in a WSN. In addition, by applying the network coding, we derive an analytic model to guarantee an end-to-end reliable data transfer in a hop-by-hop manner. At last, with the help of a lazy re-computation scheme, our protocol is able to quickly react to the fluctuation of wireless network environment.e use the simulation in ns2 to evaluate our approach and the results show that, compared with existing reliable data transfer schemes, our approach is able to perform substantially better in various experiment-settings.
Subjects
無線感測網路
網路編碼
可靠性傳輸
Type
thesis
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