Ph.D. student

Department of Computer Science & Engineering
Pennsylvania State University

Research

My recent research interests include: Collaborative Caching for Data Access in Mobile P2P Networks We design and implement a novel cooperative caching scheme for improving P2P data access in wireless ad hoc networks and mesh networks. Our solution is to let nodes cache the data or the path of the data to reduce query delays and improve data accessibility. We evaluate the system performance in terms of communication latency, bandwidth consumption and communication error rate by prototype implementation and simulations. This work has been published in ICDCS 2008. Data Dissemination in Vehicular Ad Hoc Networks We design a data dissemination framework for vehicular ad hoc networks. Our solution combines both pull and push based approaches. The pull-based approach adopts the idea of "store and forward", and optimizes the relay path to handle disconnections in the network; the push-based approach uses reliable multi-hop directional broadcast and localized data buffering techniques to improve dissemination throughput and capacity. This work has been published in Infocom 06', VANET 07', VANET 08' TVT 07', TVT 08', PerCom 08'.

Publication

J. Zhao, P. Zhang and G. Cao, "On Cooperative Caching in Wireless P2P Networks," IEEE International Conference on Distributed Computing Systems (ICDCS'08), June 2008. [full paper] [slides] J. Zhao and G. Cao, "VADD: Vehicle-Assisted Data Delivery in Vehicular Ad Hoc Networks", IEEE Transactions on Vehicular Technology, Vol. 57, No. 3, May, 2008. [full paper] J. Zhao, T. Arnold, Y. Zhang and G. Cao, "Extending Drive-Thru Data Access by Vehicle-to-Vehicle Relay", in Proc. of ACM VANET 08', in conjunction with Mobicom 08', San Francisco, September 2008, accepted for publication. [full paper] T. Arnold, W. Lloyd, J. Zhao and G. Cao, "IP Address Passing for VANETs", IEEE International Conference on Pervasive Computing and Communications (PerCom'08), March 2008. [full paper] J. Zhao, Y. Zhang and G. Cao, "Data Pouring and Buffering on The Road: A New Data Dissemination Paradigm for Vehicular Ad Hoc Networks", IEEE Transactions on Vehicular Technology, Vol. 56, No. 6, November 2007. [full paper] J. Zhao, Y. Zhang and G. Cao, "Improving Drive-Thru Access to Roadside Infrastructure by Lightweight Relay", IEEE Infocom Workshop on Mobile Networking for Vehicular Environments (MOVE-07), Anchorage, Alaska, May 2007. Y. Zhang, J. Zhao and G. Cao, "On Scheduling Vehicle-Roadside Data Access," in Proc. of ACM VANET 07', in conjunction with Mobicom 07', Montreal, Canada, September 2007. [full paper] Jing Zhao and Guohong Cao, "VADD: Vehicle-Assisted Data Delivery in Vehicular Ad Hoc Networks", The 25th Conference on Computer Communications (IEEE INFOCOM '06), April 2006. [full paper] [slides] Y. Wu, J. Zhao, M. Shao, and G. Cao, "Scheduling On-Demand Data Broadcasts," Book Chapter of "Combinatorial Optimization in Communication Networks" (edited by Ding-Zhu Du, Maggie Cheng and Yingshu Li), published by Kluwer. 2005

Talk & Demonstration

"Data Dissemination in Vehicular Ad Hoc Networks", The 3nd Annual Industry Day, The Pennsylvania State University, University Park, October, 2006 [poster] "VADD: Vehicle-Assisted Data Delivery in Vehicular Ad Hoc Networks", The 25th IEEE Conference on Computer Communications (INFOCOM'06), Barcelona, Spain, April 27, 2006. [slides] "Collaborative Data Access in Mobile P2P Networks", The 2nd Annual Industry Day, The Pennsylvania State University, University Park, October, 2005 [poster]

Awards

National Science Foundation: ICDCS 08' Travel Grant, 2008 National Science Foundation: INFOCOM 06' Student Travel Award, 2006 Penn State CSE Graduate Student Teaching Assistant Award, 2005 Guanghua Fellowship, Peking University, Beijing, China, 2001 Peking University Excellent Student Title, Beijing, China, 2001

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