學(xué)術(shù)報告通知(編號:2010-38)
時 間:2010年10月28日(周四)15:00-16:30
地 點:校學(xué)術(shù)會議中心二樓報告廳
報告人:石 怡 博士
單 位:美國弗吉尼亞理工大學(xué)
題 目:Renewable Sensor Networks with Wireless Energy Transfer
報告人簡介:石怡博士2007年畢業(yè)于弗吉尼亞理工大學(xué)電子和計算機工程系,現(xiàn)為弗吉尼亞理工大學(xué)研究員。石博士的研究領(lǐng)域集中在無線網(wǎng)絡(luò)的算法設(shè)計和優(yōu)化,包括認(rèn)知無線網(wǎng)絡(luò),MIMO網(wǎng)絡(luò),協(xié)作通訊網(wǎng)絡(luò),無線傳感器網(wǎng)絡(luò),無線Ad Hoc網(wǎng)絡(luò)等。石博士參與編寫了4本書,發(fā)表論文50多篇,其中20多篇被收集在IEEE或ACM的相關(guān)各類雜志中,其他30多篇出現(xiàn)在IEEE或ACM的相關(guān)各類學(xué)術(shù)會議中。2006年,石博士曾以華盛頓區(qū)第一名的身份獲得由中國政府頒發(fā)的“國家優(yōu)秀自費留學(xué)生”的獎勵;2008年,石博士的論文曾在IEEE INFOCOM會議中(IEEE在無線網(wǎng)絡(luò)方面最高級別的會議之一)獲得最佳論文獎。石博士擔(dān)任過美國科學(xué)基金會項目合作研究負(fù)責(zé)人。石博士擔(dān)任過20多個國際會議的技術(shù)委員會委員,包括IEEE INFOCOM, ACM MobiHoc, IEEE MILCOM, IEEE ICC, IEEE WCNC, IEEE GLOBECOM等。
內(nèi)容簡介:Traditional wireless sensor networks are constrained by limited battery energy. Thus, finite network lifetime is widely regarded as a fundamental performance bottleneck. Recent breakthrough in the area of wireless energy transfer offers the potential of removing such performance bottleneck, i.e., allowing a sensor network remain operational forever. In this paper, we investigate the operation of a sensor network under such new enabling energy transfer technology. There is a mobile charging vehicle periodically traveling inside the sensor network and charging each sensor node’s battery wirelessly. We introduce the concept of renewable energy cycle and offer both necessary and sufficient conditions. We study an optimization problem, with the objective of maximizing the ratio of the wireless charging vehicle (WCV)’s vacation time over the cycle time. For this problem, we prove that the optimal traveling path for the WCV is the shortest Hamiltonian cycle and provide a number of important properties. Subsequently, we develop a near-optimal solution and prove its performance guarantee.