2846 IEEE TRANSACTIONS ON MOBILE COMPUTING,VOL.16.NO.10,OCTOBER 2017 [13]L.Fu,P.Cheng,Y.Gu,J.Chen,and T.He,"Minimizing charging Sheng Zhang received the BS and PhD degrees delay in wireless rechargeable sensor networks,"in Proc.IEEE from Nanjing University,in 2008 and 2014,respec- INFOCOM2013,Pp.2922-2930. tively.Now he is an assistant professor with Nanjing [14]S.Zhang,J.Wu,and S.Lu,"Collaborative mobile charging,"IEEE University.He is also a member of the State Key Lab Trans.Comput.,vol.64,no.3,pp.654-667,Mar.2015. for Novel Software Technology.His research inter [15]S.Zhang,Z.Qian,F.Kong,J.Wu,and S.Lu,"P:Joint optimiza- ests include cloud computing and mobile networks. tion of charger placement and power allocation for wireless His publications appeared in the IEEE Transactions power transfer,"in Proc.IEEE INFOCOM 2015,pp.2344-2352. on Mobile Computing,the IEEE Transactions on [16]S.He,J.Chen,F.Jiang,D.K.Yau,G.Xing,and'Y.Sun,"Energy Parallel and Distributed Systems,the IEEE Transac- provisioning in wireless rechargeable sensor networks,"in Proc tions on Computers,ICDCS,INFOCOM,and ACM IEEE INFOCOM 2011,pp.2006-2014. MobiHoc.He received the Best Paper Runner-Up [17]H.Dai,Y.Liu,G.Chen,X.Wu,and T.He,"Safe charging for wire- Award from IEEE MASS 2012.He is a member of the IEEE less power transfer,"in Proc.IEEE INFOCOM2014,pp.1105-1113 [18]Z.Li,Y.Peng,W.Zhang,and D.Qiao,"Study of joint routing and wireless charging strategies in sensor networks,"in Proc.5th Int Zhuzhong Qian received the PhD degree from Conf.Wireless Algorithms Syst.Appl.2010,pp.125-135. Nanjing University,in 2007.He is an associate [19]L.He,et al.,"Esync:An energy synchronized charging protocol professor in the Department of Computer Sci- for rechargeable wireless sensor networks,"in Proc.15th ACM Int. ence and Technology,Nanjing University.His current research interests include distributed sys- Symp.Mobile ad hoc Netw.Comput.,2014,pp.247-256. tems and data center networking.He has pub [20]M.Zhao,J.Li,and Y.Yang,"A framework of joint mobile energy lished more than 40 papers in referred joumals replenishment and data gathering in wireless rechargeable sensor networks,"IEEE Trans.Mobile Comput.,vol.13,no.12,pp.2689- and conferences,including the /EEE Transac- 2705,Dec.2014. tions on Parallel and Distributed Systems,INFO [21]C.Wang,J.Li,F.Ye,and Y.Yang,"NETWRAP:An NDN based COM,and IPDPS.He is a member of the IEEE. real-timewireless recharging framework for wireless sensor networks,"IEEE Trans.Mobile Comput.,vol.13,no.6,pp.1283- 1297,Jun.2014. Jie Wu(F'09)is the chair and a Laura H.Carnel [22] T.H.Cormen,C.E.Leiserson,R.L.Rivest,and C.Stein,Introduc- professor in the Department of Computer and tion to Algorithms.Cambridge,MA,USA:MIT Press,2001. Information Sciences,Temple University.He is [23]B.Tong,Z.Li,G.Wang,and W.Zhang,"How wireless power also an intellectual ventures endowed visiting charging technology affects sensor network deployment and chair professor in the National Laboratory for routing,"in Proc.IEEE 30th Int.Conf.Distrib.Comput.Syst.,2010, Information Science and Technology,Tsinghua Pp.438-447 University.Prior to joining Temple University,he [24]H.Dai,Y.Liu,A.X.Liu,L.Kong,G.Chen,and T.He,"Radiation was a program director of the National Science constrained wireless charger placement,"in Proc.IEEE INFO- Foundation and was a distinguished professor COM,2016,pp.1-9. with Florida Atlantic University.His curren 25 S.Nikoletseas,T.P.Raptis,and C.Raptopoulos,"Low radiation effi- research interests include mobile computing and cient wireless energy transfer in wireless distributed systems,"in wireless networks,routing protocols,cloud and green computing,net- Proc.IEEE 35th Int.Conf.Distrib.Comput.Syst.,Jun.2015,pp.196-204. work trust and security,and social network applications.He regularly 26]Y.Shu,H.Yousefi,P.Cheng,J.Chen,Y.Gu,T.He,and K.Shin, publishes in scholarly journals,conference proceedings,and books.He "Near-optimal velocity control for mobile charging in wireless serves on several editorial boards,including the IEEE Transactions on rechargeable sensor networks,"IEEE Trans.Mobile Comput., Service Computing and the Journal of Parallel and Distributed Comput- vol.15,no.7,Pp.1699-1713,Jul.2016. ing.He was general co-chair/chair for IEEE MASS 2006,IEEE IPDPS [27]L.Fu,L.He,P.'Cheng,Y.Gu,J.Pan,and J.Chen,"ESync:Energy 2008,IEEE ICDCS 2013,and ACM MobiHoc 2014,as well as program synchronized mobile charging in rechargeable wireless sensor co-chair for IEEE INFOCOM 2011 and CCF CNCC 2013.He was an networks,"IEEE Trans.Veh.Technol.,vol.65,no.9,pp.7415-7431, IEEE Computer Society distinguished visitor,ACM distinguished Sept.2016. speaker,and chair for the IEEE Technical Committee on Distributed [28]W:Xu,W.Liang,X.Lin,and G.Mao,"Efficient scheduling of mul- Processing.He received the 2011 China Computer Federation(CCF) tiple mobile chargers for wireless sensor networks,"IEEE Trans. Overseas Outstanding Achievement Award.He is a CCF distinguished Veh.Technol,vol.65,no.9,pp.7670-7683,Sept.2016. speaker and a fellow of the IEEE 29] S.Nikoletseas,T.P.Raptis,and C.Raptopoulos,"Interactive wire- less charging for energy balance,"in Proc.IEEE 36th Int.Conf.Dis- trib.Comput.Syst..Jun.2016,pp.262-270. Fanyu Kong received the BS and MS degrees [30]C.Wang,I.Li,Y.Yang,and F.Ye,"A hybrid framework combin- from Nanjing University,in 2013 and 2016 respectively.He is now with Ant Financial,China ing solar energy harvesting and wireless charging for wireless, His research interests include load balancing and in Proc.IEEE INFOCOM,2016,pp.1-9. 31]L.Chen,S.Lin,and H.Huang,"Charge me if you can:Charging failure monitoring in public clouds via openstack. path optimization and scheduling in mobile networks,"in Proc.17th ACM Int.Symp.Mobile Ad Hoc Netw.Comput.,2016,pp.101-110. [32]G.B.Dantzig and I.H.Ramser,"The truck dispatching problem," Manage.Sci.,vol.6,no.1,pp.80-91,1959. [33) V.V.Vazirani,Approximation Algorithms.Berlin,Germany Springer,2003. [34]Powercast,(2015,Jul.).[Onlinel.Available:http://www. powercastco.com/ Sanglu Lu received the BS,MS,and PhD degrees 351 PuLP,(2015,Jul.).[Online].Available:https://pythonhosted.org/ from Nanjing University,in 1992,1995,and 1997 respectively,all in computer science.She is cur- PuLP/ rently a professor in the Department of Computer Science and Technology,Nanjing University and the State Key Laboratory for Novel Software Tech nology.Her research interests include distributed computing,wireless networks,and pervasive com- puting.She has published more than 80 papers in referred joumals and conferences in the above areas.She is a member of IEEE. For more information on this or any other computing topic, please visit our Digital Library at www.computer.org/publications/dlib.[13] L. Fu, P. Cheng, Y. Gu, J. Chen, and T. He, “Minimizing charging delay in wireless rechargeable sensor networks,” in Proc. IEEE INFOCOM 2013, pp. 2922–2930. [14] S. Zhang, J. Wu, and S. Lu, “Collaborative mobile charging,” IEEE Trans. Comput., vol. 64, no. 3, pp. 654–667, Mar. 2015. [15] S. Zhang, Z. Qian, F. Kong, J. Wu, and S. Lu, “P3: Joint optimiza￾tion of charger placement and power allocation for wireless power transfer,” in Proc. IEEE INFOCOM 2015, pp. 2344–2352. [16] S. He, J. Chen, F. Jiang, D. K. Yau, G. Xing, and Y. Sun, “Energy provisioning in wireless rechargeable sensor networks,” in Proc. IEEE INFOCOM 2011, pp. 2006–2014. [17] H. Dai, Y. Liu, G. Chen, X. Wu, and T. He, “Safe charging for wire￾less power transfer,” in Proc. IEEE INFOCOM 2014, pp. 1105–1113. [18] Z. Li, Y. Peng, W. Zhang, and D. Qiao, “Study of joint routing and wireless charging strategies in sensor networks,” in Proc. 5th Int. Conf. Wireless Algorithms Syst. Appl. 2010, pp. 125–135. [19] L. He, et al., “Esync: An energy synchronized charging protocol for rechargeable wireless sensor networks,” in Proc. 15th ACM Int. Symp. Mobile ad hoc Netw. Comput., 2014, pp. 247–256. [20] M. Zhao, J. Li, and Y. Yang, “A framework of joint mobile energy replenishment and data gathering in wireless rechargeable sensor networks,” IEEE Trans. Mobile Comput., vol. 13, no. 12, pp. 2689– 2705, Dec. 2014. [21] C. Wang, J. Li, F. Ye, and Y. Yang, “NETWRAP: An NDN based real-timewireless recharging framework for wireless sensor networks,” IEEE Trans. Mobile Comput., vol. 13, no. 6, pp. 1283– 1297, Jun. 2014. [22] T. H. Cormen, C. E. Leiserson, R. L. Rivest, and C. Stein, Introduc￾tion to Algorithms. Cambridge, MA, USA: MIT Press, 2001. [23] B. Tong, Z. Li, G. Wang, and W. Zhang, “How wireless power charging technology affects sensor network deployment and routing,” in Proc. IEEE 30th Int. Conf. Distrib. Comput. Syst., 2010, pp. 438–447. [24] H. Dai, Y. Liu, A. X. Liu, L. Kong, G. Chen, and T. He, “Radiation constrained wireless charger placement,” in Proc. IEEE INFO￾COM, 2016, pp. 1–9. [25] S. Nikoletseas, T. P. Raptis, and C. Raptopoulos, “Low radiation effi- cient wireless energy transfer in wireless distributed systems,” in Proc. IEEE 35th Int. Conf. Distrib. Comput. Syst., Jun. 2015, pp. 196–204. [26] Y. Shu, H. Yousefi, P. Cheng, J. Chen, Y. Gu, T. He, and K. Shin, “Near-optimal velocity control for mobile charging in wireless rechargeable sensor networks,” IEEE Trans. Mobile Comput., vol. 15, no. 7, pp. 1699–1713, Jul. 2016. [27] L. Fu, L. He, P. Cheng, Y. Gu, J. Pan, and J. Chen, “ESync: Energy synchronized mobile charging in rechargeable wireless sensor networks,” IEEE Trans. Veh. Technol., vol. 65, no. 9, pp. 7415–7431, Sept. 2016. [28] W. Xu, W. Liang, X. Lin, and G. Mao, “Efficient scheduling of mul￾tiple mobile chargers for wireless sensor networks,” IEEE Trans. Veh. Technol., vol. 65, no. 9, pp. 7670–7683, Sept. 2016. [29] S. Nikoletseas, T. P. Raptis, and C. Raptopoulos, “Interactive wire￾less charging for energy balance,” in Proc. IEEE 36th Int. Conf. Dis￾trib. Comput. Syst., Jun. 2016, pp. 262–270. [30] C. Wang, J. Li, Y. Yang, and F. Ye, “A hybrid framework combin￾ing solar energy harvesting and wireless charging for wireless,” in Proc. IEEE INFOCOM, 2016, pp. 1–9. [31] L. Chen, S. Lin, and H. Huang, “Charge me if you can: Charging path optimization and scheduling in mobile networks,” in Proc. 17th ACM Int. Symp. Mobile Ad Hoc Netw. Comput., 2016, pp. 101–110. [32] G. B. Dantzig and J. H. Ramser, “The truck dispatching problem,” Manage. Sci., vol. 6, no. 1, pp. 80–91, 1959. [33] V. V. Vazirani, Approximation Algorithms. Berlin, Germany: Springer, 2003. [34] Powercast, (2015, Jul.). [Online]. Available: http://www. powercastco.com/ [35] PuLP, (2015, Jul.). [Online]. Available: https://pythonhosted.org/ PuLP/ Sheng Zhang received the BS and PhD degrees from Nanjing University, in 2008 and 2014, respec￾tively. Now he is an assistant professor with Nanjing University. He is also a member of the State Key Lab. for Novel Software Technology. His research inter￾ests include cloud computing and mobile networks. His publications appeared in the IEEE Transactions on Mobile Computing, the IEEE Transactions on Parallel and Distributed Systems, the IEEE Transac￾tions on Computers, ICDCS, INFOCOM, and ACM MobiHoc. He received the Best Paper Runner-Up Award from IEEE MASS 2012. He is a member of the IEEE. Zhuzhong Qian received the PhD degree from Nanjing University, in 2007. He is an associate professor in the Department of Computer Sci￾ence and Technology, Nanjing University. His current research interests include distributed sys￾tems and data center networking. He has pub￾lished more than 40 papers in referred journals and conferences, including the IEEE Transac￾tions on Parallel and Distributed Systems, INFO￾COM, and IPDPS. He is a member of the IEEE. Jie Wu (F’09) is the chair and a Laura H. Carnell professor in the Department of Computer and Information Sciences, Temple University. He is also an intellectual ventures endowed visiting chair professor in the National Laboratory for Information Science and Technology, Tsinghua University. Prior to joining Temple University, he was a program director of the National Science Foundation and was a distinguished professor with Florida Atlantic University. His current research interests include mobile computing and wireless networks, routing protocols, cloud and green computing, net￾work trust and security, and social network applications. He regularly publishes in scholarly journals, conference proceedings, and books. He serves on several editorial boards, including the IEEE Transactions on Service Computing and the Journal of Parallel and Distributed Comput￾ing. He was general co-chair/chair for IEEE MASS 2006, IEEE IPDPS 2008, IEEE ICDCS 2013, and ACM MobiHoc 2014, as well as program co-chair for IEEE INFOCOM 2011 and CCF CNCC 2013. He was an IEEE Computer Society distinguished visitor, ACM distinguished speaker, and chair for the IEEE Technical Committee on Distributed Processing. He received the 2011 China Computer Federation (CCF) Overseas Outstanding Achievement Award. He is a CCF distinguished speaker and a fellow of the IEEE. Fanyu Kong received the BS and MS degrees from Nanjing University, in 2013 and 2016, respectively. He is now with Ant Financial, China. His research interests include load balancing and failure monitoring in public clouds via openstack. Sanglu Lu received the BS, MS, and PhD degrees from Nanjing University, in 1992, 1995, and 1997, respectively, all in computer science. She is cur￾rently a professor in the Department of Computer Science and Technology, Nanjing University and the State Key Laboratory for Novel Software Tech￾nology. Her research interests include distributed computing, wireless networks, and pervasive com￾puting. She has published more than 80 papers in referred journals and conferences in the above areas. She is a member of IEEE. " For more information on this or any other computing topic, please visit our Digital Library at www.computer.org/publications/dlib. 2846 IEEE TRANSACTIONS ON MOBILE COMPUTING, VOL. 16, NO. 10, OCTOBER 2017