Lin Gu is an assistant professor at the Department of Computer Science and Engineering. He received B.S. from Fudan University (1991), M.S. from Peking University (2001), and Ph.D. from the University of Virginia (2006). His current research interests include large-scale distributed systems and cloud computing, operating systems, wireless sensor networks, and energy-efficient computing.

Courses

COMP 362    Computer Communication Networks II, Fall 2009
COMP 660L Topics in cloud computing, Fall 2009
COMP 381    Design and Analysis of Computer Architectures, Fall 2008

Research projects

System software for cloud computing
Novel solutions are needed in the system software design for cloud computing systems. Neither traditional OS services nor existing search-oriented designs can provide the functionality, performance, and usability for the next-generation computing. Our poject studies how to design cloud-based system software, including the architecture, storage solutions, auto-parallelization utilities, and network organization.

Virtk (a.k.a. t-kernel): OS design for general low-power systems
Traditional OS services meet enormous difficulty in low-power embedded systems because of the stringent resource constraints. It is a research challenge to design OS services that are portable among a large spectrum of embedded platforms. I am working on a new OS kernel that supports virtual memory, preemptive scheduling, and reliable OS protection without traditional hardware support.

Lightweight detection and classification in wireless sensor networks
While a variety of sensors have been incorporated into a spectrum of wireless sensor network ( WSN) platforms, traditional signal processing algorithms, however, often prove too complex for energy-and-cost-effective WSN nodes. It is a challenge to to design efficient sensing and classification algorithms that achieve reliable sensing performance on energy-and-cost-effective hardware without special powerful nodes in a continuously changing physical environment. We have developed a lightweight detection and classification architecture and successfully used it in VigilNet.

Energy efficiency and power management
Novel hardware, architecture and middleware solutions are needed to make wireless sensor network sustain a long period of time. I am working on implementing radio-triggered hardware which greatly enhance the network nodes' wake-up capability and enable efficient power management services.

Network protocols
TDMA based MAC and data-link layer protocols. Low-latency routing protocols.

Selected publications (For all publications, visit Complete publication list.)

Conference Papers

• L. Gu and S. C. Cheung. Constructing and testing privacy-aware services in a cloud computing environment - challenges and opportunties (invited Paper). To appear in Proc. of the 1^st Asia-Pacific Symp. on Internetware (Internetware'09), Beijing, China, October 17-18, 2009

• L. Gu and J. A. Stankovic. t-kernel: Providing Reliable OS Support for Wireless Sensor Networks. In Proc. of the 4^th ACM Conf. on Embedded Networked Sensor Systems (SenSys'06), Nov., 2006. (Best Paper Award)

• S. Lin, J. Zhang, G. Zhou, L. Gu, T. He and J. A. Stankovic, ATPC: Adaptive Transmission Power Control for Wireless Sensor Networks. In Proc. of the 4th ACM Conference on Embedded Networked Sensor Systems (SenSys'06), Nov., 2006

• T. He, P. A. Vicaire, T. Yan, L. Luo, L. Gu, G. Zhou, R. Stoleru, Q. Cao, J. A. Stankovic and T. Abdelzaher. Achieving Real-Time Target Tracking Using Wireless Sensor Networks. In Proc. of the 12^th IEEE Real-Time and Embedded Technology and Applications Symposium (RTAS’06), Apr. 2006

• L. Luo, T. He, G. Zhou, L. Gu, T. Abdelzaher and J. A. Stankovic. Achieving Repeatability of Asynchronous Events in Wireless Sensor Networks with EnviroLog. In Proc. of the 25^th IEEE Conf. on Computer Communications (InfoCom’06), April, 2006

• T. He, P. Vicaire, T. Yan, Q. Cao, G. Zhou, L. Gu, L. Luo, R. Stoleru, J A. Stankovic, and T. Abdelzaher. Achieving Long-Term Surveillance in VigilNet. In Proc. of the 25^th IEEE Conf. on Computer Communications (InfoCom'06), April 2006

• L. Gu, D. Jia, P. Vicaire, T. Yan, L. Luo, A. Tirumala, Q. Cao, T. He, J. Stankovic, T. Abdelzaher, B. Krogh, Lightweight Detection and Classification for Wireless Sensor Networks in Realistic Environments, In Proc. of the 3^rd ACM Conf. on Embedded Networked Sensor Systems (SenSys'05). Nov., 2005 (PDF)

• L. Gu and J. Stankovic. Radio-Triggered Wake-Up Capability for Sensor Networks. The 11^th IEEE Real-Time and Embedded Technology and Applications Symposium (RTAS'04), May, 2004 (PDF available at the IEEE site, Journal version available at Springer site) (Best Student Paper Award)

• L. Gu and J. A. Stankovic. t-kernel: A Naturalizing OS Kernel for Low-Power Cost-Effective Computers (Extended Abstract, non-regular), the 20th ACM Symposium on Operating Systems Principles (SOSP'05), Oct., 2005 (PDF)

• T. He, L. Luo, T. Yan, L. Gu, Q. Cao, G. Zhou, R. Stoleru, P. Vicaire, Q. Cao, J. A. Stankovic, S. H. Son, and T. F. Abdelzaher. An Overview of the VigilNet Architecture. In Proc. of 11th IEEE International Conference on Embedded and Real-Time Computing Systems and Applications, August 2005. Note:(invited paper)

• T. He, S. Krishnamurthy, J. A. Stankovic, T. F. Abdelzaher, L. Luo, R. Stoleru, T. Yan, L. Gu, J. Hui, and B. Krogh, An Energy-Efficient Surveillance System Using Wireless Sensor Networks, In The Second International Conference on Mobile Systems, Applications, and Services (MobiSys), June 2004

• T. Abdelzaher, B. Blum, D. Evans, J. George, S. George, L. Gu, T. He, C. Huang, P. Nagaraddi, S. Son, P. Sorokin, J. Stankovic, and A. Wood, EnviroTrack: Towards an Environmental Computing Paradigm for Distributed Sensor Networks. IEEE ICDCS , March 2004

• K. Sullivan, L. Gu and Y. Cai, Non-modularity in Aspect-Oriented Languages: Integration as a Crosscutting Concern for AspectJ. Proceedings of the First International Conference on Aspect-Oriented Software Development (AOSD'02), 2002

Journals

• P. Vicaire, T. He, T. Yan, Q. Cao, G. Zhou, L. Gu, L. Luo, R. Stoleru, J. A. Stankovic, and T. Abdelzaher. Achieving Long-Term Surveillance in VigilNet. ACM Trans. on Sensor Networks 5(1), Feb. 2009

• T. He, P. A. Vicaire, T. Yan, L. Luo, L. Gu, G. Zhou, R. Stoleru, Q. Cao, J. A. Stankovic, and T. Abdelzaher. Achieving Real-Time Target Tracking Using Wireless Sensor Networks. ACM Transaction on Embedded Computing System (TECS), 2007

• L. Gu and J.A.Stankovic. Radio-Triggered Wake-Up for Wireless Sensor Networks . Real-Time Systems, Springer, Vol. 29, No. 2-3, ISSN: 0922-6443, Mar. 2005, pp 157 - 182 (Abstract and full paper available from Springer)

• T. He, S. Krishnamurthy, L. Luo, T. Yan, L. Gu, R. Stoleru, G. Zhou, Q. Cao, P. Vicaire, J. A. Stankovic, T. F. Abdelzaher, J. Hui and B. Krogh. VigilNet: An Integrated Sensor Network System for Energy-Efficient Surveillance . ACM Trans. on Sensor Networks (TOSN), 2(1):1-38, Feb., 2006

• L. Gu, A. Pan, J. Sun and Y. Cui. An Analysis of Internet Secure Session and the Proving of a Simplified Model. Computer Applications, Sept., 1999

Miscellaneous

• T. He, L. Gu, L. Luo, T. Yan, J. A. Stankovic, and S. H. Son, An Overview of Data Aggregation Architecture for Real-Time Tracking with Sensor Networks. In Proc. of the 14^th International Workshop on Parallel and Distributed Real-Time Systems, Apr., 2006

• L. Gu. Virtualizing Operating System for Wireless Sensor Networks. PhD Dissertation, University of Virginia, Aug., 20

• L. Gu, Information Retrieval and Automatic Feature Set Construction for Text Classification. Master Thesis, Peking University, 2001, Master Thesis, Peking University, 2001.