朱明

个人信息Personal Information

性别:男

毕业院校:大连理工大学

学位:硕士

所在单位:软件学院、国际信息与软件学院

学科:计算机应用技术. 通信与信息系统

联系方式:0411-62274436

电子邮箱:zhuming@dlut.edu.cn

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A Proportional Fair Backoff Scheme for Wireless Sensor Networks

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论文类型:会议论文

发表时间:2009-10-12

收录刊物:EI、CPCI-S、Scopus

页面范围:118-123

关键字:Backoff; Proportional fairness; Shadow price; Wireless sensor networks

摘要:This paper aims at improving the throughput of the wireless sensor networks (WSNs), particularly to overcome the so-called funneling effect for WSNs with converge-cast patterns. Due to the disproportionate larger number of packets accumulated in the sensors that are closer to the sink, there is a need to decrease the collisions and increase the throughput around the sink area as well as the nodes that experience a heavy pass-through traffic. In this paper, we proposed a new scheme, namely PFB (Proportional Fairness Backoff), which provides additional scheduling opportunities to nodes closer to the sink. The new scheme employs Kelly's shadow price theory to achieve the proportional fairness, which takes advantage of the tree topology that is the de facto standard in today's WSNs. In PFB, the size of backoff window is dynamically adjusted with respect to the height of nodes belong in the tree. With close-form analysis and extensive simulations, we show that PFB can achieve up to 100% throughput increase over the widely used CSMA when the network is highly loaded.