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Research of Energy Efficient Routing Protocol in WSN Based on Mobile Sink

Author: ChengZiDong
Tutor: MengSiYi
School: Beijing Jiaotong University
Course: Communication and Information System
Keywords: Wireless Sensor Networks Mobile Sink Moving Scheme Network Lifetime
CLC: TN915.04
Type: Master's thesis
Year: 2011
Downloads: 122
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Abstract


Wireless sensor networks (WSN) are appealing to researchers due to their wide range of application potential in military, industry, home networks and so on. And WSN have been proposed to deliver in situ observation of events and environments over long period of time. A large number of small and simple sensor devices communicate over short range wireless interfaces to deliver observations over multiple hops to central locations called Sink. A significant portion of the energy expenditure is attributed to communications and, in particular, the nodes close to the sensor network gateways used for data collection typically suffer a large overhead as these nodes must relay data from the remaining network. If all the processed data must traverse these nodes to reach the gateway, the network will be invalid for the depletion of these nodes. In recent years, it is possible to pull in mobile Sinks to WSN with the development of technique, which solved this "hotspot" problem but also caused many difficulties for designing the routing protocol.This work presents the current major WSN routing protocols, analyzes the features and performance of WSN routing protocol based on mobile Sinks, and summarizes current problems of these algorithms. Through the analysis of TTDD routing algorithm’s performance, we discuss a new controlled Sinks moving scheme in TTDD, thus, increase network lifetime of WSN.The main contribution and innovation of this paper are as follows:1. This work presents the differences between four types of traditional static WSN routing protocol, and also analyzes their pros and cons in the application of WSN.2. WSN protocol algorithms based on mobile Sinks are classified and described. We also summarize the current Sink mobile scheme adopted by these algorithms.3. Advanced TTDD routing algorithm (henceforth called ATTDD) is designed, which introduces an adaptive Sink moving scheme based on the local residual energy of nodes to the origin algorithm. Through the comparison of communication overhead and redundancy overhead of SODD and ATTDD, it is proved that ATTDD decreases network overhead in WSN with multiple mobile Sinks, and prolongs network lifetime significantly.4. In the end of the paper, the analysis is carried on to ATTDD. It is compared to TTDD from three respects:network lifetime, success rate and delay. Simulation results show that ATTDD can raise the success rate and prolong the network lifetime compared with TTDD when there is few mobile Sinks with low speed in WSN.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Communication network > General issues > Communication protocols, communication protocols
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