Objectives:

Full time position in wireless networks, mobile computing, computer networking and systems

Education:

• Ph.D. (expected 8/2001), Computer Science, Cornell University (GPA: 3.93/4.0)
• M.S. (5/1999), Computer Science, Cornell University
• M.S. (6/1996), EE, National Lab of Pattern Recognition,Chinese Academy of Sciences
• B.S.  (6/1993), EE, Beijing Polytechnic University

Wireless and mobile networks

Internet architecture and related networking issues

Systems and distributed computing

1. Cornell Wireless Networks Lab (9/98-):
• Gossiping-based ad hoc routing
• A decision-theoretic framework for resource allocation in

wireless multimedia networks.
2. Microsoft Research OS and Networking Group (5/00-8/00):

Research Intern in the Systems and Networking Group.  Worked on the
Panorama project with Dr. Yi-Min Wang,  Paramvir Bahl and Roger
Wattenhofer.  Designed and evaluated topology control algorithms for
wireless networks that overcome the problem associated with
pre-configuring a fixed transmission power for all nodes in multi-hop
wireless networks. Preconfiguring scheme has several drawbacks:  In
areas where the network is dense, throughput and energy-efficiency
will be low due to  severe interference. In areas where the network is
sparse, it may disconnect  the network. Our topology control
algorithms maintain global connectivity,  conserve energy consumption
and balance throughput.
3. ACIRI/ICSI (10/99-1/2000):

Worked on cost sharing of multicast transmissions with Dr. Scott
Shenker. Distributing high quality multimedia data are likely to incur
significant costs. Unlike unicast transmission, a multicast
transmission can not attribute its bandwidth usage to  any single
receiver. Therefore, mechanisms to distribute the cost among various
receivers are needed.  The network complexity of two strategyproof
cost sharing mechanisms,  Marginal Cost (MC) and Shapley Value (SH),
has been studied in the literature. However, little is known about the
performance of the two mechanisms given different multicast trees and
user utility distribution. We show that none of the average welfare
loss of SH and the average budget deficit of MC dominates the other.
Note that neither MC nor SH collects any revenue. Profit maximization
is also an important goal for economic mechanisms. We have also
studied issues related to revenue maximization of multicast
transmissions.
4. Bell-Labs' Networking Techniques Department (5/99-8/99):

Research Intern in the Networking Techniques Department.  Worked on
the HAWAII project with Dr. Ramachandran Ramjee and Tom La
Porta. Designed and implemented a paging  protocol for HAWAII. Paging
facilitates efficient power management  at the mobile host by allowing
the host to update the network less  frequently. Our protocol provides
a means for the network to locate  the exact location of the mobile
host based on approximate location  information before delivering
packets destined to the mobile host.
5. Microsoft Research OS and Networking Group (5/98-8/98):

Research Intern in the Systems and Networking Group.  Worked on
Millennium Falcon, part of the Millennium project with Dr. Yi-Min
Wang. Built an architecture for high performance commercial
distributed objects over system area network(SAN) with user-level
networking.
6. Cornell Ensemble Group and jointly with AT&T Research (9/97-1/98):

Worked on the COMERA project with Dr. Yi-Min Wang. Built an extensible
architecture for fault tolerance distributed objects.
7. Cornell Ensemble Group (5/97-8/97):

Ported Electra (a fault tolerant ORB based on OMG CORBA 2.0) from UNIX to NT.

• Teaching Assistant for CS211:  Computers and Programming, Fall 1998
• Teaching Assistant for CS222:  Introduction to Scientific Computing, Spring 1998
• Teaching Assistant for CS414:  Introduction to Operating Systems, Fall 1996

• Excellent in C, C++, Java, ML and MATLAB.
• Strong in DCOM, CORBA, NT system Programming and application development.
• Strong in UNIX shell and system programming, Network programming, Database, SQL.
• Working knowledge of FreeBSD network stack and kernel.
• Good command in Perl, http tools, html and latex.

• Presidential Scholarship of the Chinese Academy of Sciences, 1996
• Best Thesis Award, Institute of Automation, Chinese Academy of Sciences, 1994-1996

• Z. Haas, J. Y. Halpern, and L. Li, "Gossiping-based Ad Hoc Routing",  Submitted for publication.
• R. Ramjee, L. Li, T. LaPorta and S. Kasera, "IP Paging Service for Mobile Hosts", ACM/IEEE International Conference on Mobile Computing and Networking (MobiCom), July 2001.
• L. Li and Y. M. Wang, "Analysis of a Cone-Based Distributed Topology Control Algorithms for Wireless Multi-hop Networks", ACM Symposium on Principle of Distributed Computing (PODC), August 2001.
• L. Li and J. Halpern, "Minimum Energy Mobile Wireless Networks Revisited", in Proc.  IEEE International Conference on Communications (ICC), June 2001.
• R. Wattenhofer, L. Li, V. Bahl and Y.M. Wang , "Distributed Topology Control for Power Efficient Operation in Multihop Wireless Ad Hoc Networks",  in Proc. IEEE INFOCOM, April 2001.
• z. Haas, J. Halpern, L. Li and S. Wicker, "A decision theoretic approach to resource allocation in wireless multimedia networks", in Proc. 4th International Workshop on Discrete Algorithms and Methods for Mobile Computing and Communications (dialM) , 2000
• R. Ramjee, T. La Porta, L. Salgarelli, S. Thuel, K. Varadhan and L. Li, "IP-based Access Network Infrastructure for Next Generation Wireless Data Networks", IEEE Personal Communications Magazine, 2000
• R. Ramjee, L. Li and T. LaPorta, "Paging support for IP mobility using HAWAII", Internet Draft, Jul, 2000
• A. Forin, G. Hunt, L. Li, and Y. M. Wang, " High-Performance Distributed Objects over System Area Networks," in Proc. 3rd USENIX Windows NT Symp. , pp. 21-30, July 1999.
• L. Qiu and L. Li, "Contour Extraction of Moving Objects", in Proc. 14th International Conference on Pattern Recognition (ICPR ),1998
• S.D. MA and L. LI "Ellipsoid Reconstucting from three perspective views" 13th International Conference on Pattern Recognition (ICPR), Austria, 1996.
• L. LI and S.D. MA," 3D Pose Estimation from a N-degree planar curve in two perspective views" 13th International Conference on Pattern Recognition (ICPR), Austria, 1996

• L. Li, J. Halpern, z. Haas, and S. Wicker, "A decision theoretic approach to resource allocation in wireless multimedia networks", Cornell CS Technical Report TR 2000-1789, May, 2000
• R. Ramjee, L. Li and T. LaPorta, "IP Paging Service for Mobile Hosts", Cornell CS Technical Report TR 2000-1816, October, 2000

• "Distributed Topology Control for Multihop Wireless Sensor Networks Using Directional Information", V. Bahl, L. Li, Y.M. Wang and R. Wattenhofer, US Patent Pending, 2000
• "IP Paging Service for Mobile Hosts", R. Ramjee, L. Li and T. LaPorta, US Patent Pending, 2000

• Referee for submissions to IEEE/ACM MobiCom, IEEE INFOCOM, IEEE ICC and IEEE MC2R
• Student member, IEEE Communication Society
• Student member, USENIX

References:

Prof. Joseph Y. Halpern (Thesis advisor)
Department of Computer Science
Cornell University
Ithaca, NY 14853
TEL: (607) 255-9562
EMAIL: halpern@cs.cornell.edu

Prof. Zygmunt Haas (Thesis advisor)
The School of Electrical and Computer Engineering
Cornell University
Ithaca, NY 14853
TEL: (607) 255-3454
EMAIL: haas@ee.cornell.edu

Prof. Stephen B. Wicker (Thesis advisor)
The School of Electrical and Computer Engineering
Cornell University
Ithaca, NY 14853
TEL: (607) 255-8817
EMAIL: wicker@ee.cornell.edu

Dr. Yi-Min Wang (Intern Supervisor)
Systems and Networking Research Group
Microsoft Research
Redmond, WA 98052
EMAIL:  ymwang@microsoft.com

Dr. Ramachandran Ramjee (Intern Supervisor)
Bell Laboratories
Networking Techniques Research Department
101 Crawfords Corner Road
Holmdel, New Jersey 07733
EMAIL:  ramjee@bell-labs.com

Dr. Scott Shenker (Intern Supervisor)
AT&T Center for Internet Research at ICSI
1947 Center St.
Berkeley, CA 94704
EMAIL:  shenker@aciri.org