Research Activity by Area

A brief description of our work by area as well as related publications are provided. Most of the papers are available through the IEEE, ACM, etc, journal and conference databases. We will be happy to send a paper per your request as well.
1. Wireless communications
1.1 Resource allocation in wireless ad-hoc networks: capacity issues time-varying topologies and maximum throughput algorithms
1.2 Wireless ad-hoc networks: protocols, topology control and service discovery
1.3 Wireless ad-hoc networks: Quality of Service provisioning
1.4 Smart antennas in wireless communication networks
1.5 Broadband wireless networks: cross-layer design approaches
1.6 Wireless cellular networks: architectures, resource allocation and quality of service
1.7 Mobility tracking in cellular wireless networks
2. Sensor networks and energy conservation
3. Architectures protocols and service models in the INTERNET
3.1 Congestion control and Quality of Service provisioning in the INTERNET
3.2 High speed switching: architectures algorithms and performance
3.3 Ring Networks: architectures control and management
3.4 Multicasting: architectures, routing and congestion control
3.5 Information delivery in the internet by broadcasting methods
4. Performance based network management tools
5. Satellite Communications
5.1 Mobile satellite communication networks
5.2 Communication systems for air-traffic control
  6. Vehicle routing techniques in transportation problems

1.1 Resource allocation in wireless ad-hoc networks: capacity issues time-varying topologies and maximum throughput algorithms
A model that captures the local interaction of wireless links and its impact on access control and routing has been introduced [ 1.1.1, 1.1.2, 1.1.13]. It is general enough to have under its scope arbitrary topology networks, with end-to-end routing and a wide variety of signaling methods. In addition to wireless systems the model has within its scope other systems with interdependent service like input queueing switches and databases with locking. The notion of network throughput region is introduced to represent capacity. Maximum throughput network control policies are presented. These policies are of high complexity in general and often NP-hard. In [ 1.1.4] we find scheduling policies that minimize delay in networks with specialized topologies. In [1.1.8, 1.1.12] a linear complexity policy that achieves maximum throughput in the general model is presented. In [1.1.1, 1.1.3, 1.1.14 ] a model for the time varying wireless channel due to fading and mobility is introduced. The impact to the access layer is analyzed and access control policies that optimize throughput and delay in view of channel variability in a single hop system are provided. In [ 1.1.5 , 1.1.11] the maximum throughput policies in a general topology time varying network are provided. The time variability statistics are generalized as well to included the case of correlated losses. In [1.1.6] a generalization of the model in [1.1.2] is considered to include the cases of asynchronous service times and correlation among the users. Optimal policies are obtained in the generalized model as well. In [1.1.9 ] the asymptotic capacity in a hybrid network involving ad-hoc components and an infrastructure network has been evaluated.
1.1.1. L. Tassiulas, "Dynamic link activation scheduling in multihop radio networks with fixed or changing topology" Doctoral Dissertation, University of Maryland , College Park , 1991.
1.1.2. L. Tassiulas, A. Ephremides, "Stability properties of constrained queueing systems and scheduling policies for maximum throughput in multihop radio networks,"  IEEE Transactions on Automatic Control, Vol. 37, No. 12, pp. 1936-1949, December 1992.  
1.1.3. L. Tassiulas, A. Ephremides, "Dynamic server allocation to parallel queues with randomly varying connectivity,"  IEEE Transactions on Information Theor y, Vol. 39, No. 2, pp. 466-478, March 1993.
1.1.4. L. Tassiulas, A. Ephremides, "Dynamic scheduling for minimum delay in tandem and parallel constrained queueing models,"  Annals of Operation Research , Vol. 48, pp. 333-355, 1993.
1.1.5. L. Tassiulas, "Scheduling and performance limits of networks with constantly changing topology,''  IEEE Transactions on Information Theory , Vol. 43, No. 3, pp. 1067-1073, May 1997.
1.1.6. L. Tassiulas, P. Bhattacharya, "Allocation of interdependent resources for maximum throughput,'' Stochastic Models , Vol 16, Issue Nr 1, pp$$ 2000.
1.1.7. L. Tassiulas, S. Papavassiliou, "Optimal anticipative scheduling with asynchronous transmission opportunities,''  IEEE Transactions on Automatic Control, Vol. 40, No. 12, pp. 2052-2062, December 1995.
1.1.8. L. Tassiulas, "Linear complexity algorithms for maximum throughput in radio networks and input queuing switches", Proceedings of INFOCOM98, San Francisco, California, 1998.
1.1.9. Ulas Kozat, Leandros Tassiulas " Throughput Capacity of Random Ad Hoc Networks with Infrastructure Support," Proceedings of MOBICOM03, Atlanta , GA 2003. .
1.1.10.
L. Tassiulas, A. Ephremides, "Comparison of transmission strategies in CSMA/CD multi-access systems," Proceedings of the twenty-fifth Annual Conference on Information Sciences and Systems, pp. 952, Baltimore , 1991.
1.1.11. L. Tassiulas, "The throughput region of networks with time-varying topology," Proceedings of the Information Theory Symposium, pp. 221, San Antonio, Texas, 1993.
1.1.12. L. Tassiulas, "Low complexity randomized policies for maximum throughput in systems with concurrency constraints," (invited) Proceedings of the 32nd Annual Allerton Conference on Communication, Control and Computing, pp. 392-395, Urbana , Illinois , 1994.
1.1.13. L. Tassiulas, A. Ephremides, "Stability properties of constrained queuing systems and scheduling policies for maximum throughput in multihop radio networks," Proceedings of the 29th CDC, Honolulu , Hawaii , 1990.
1.1.14. L. Tassiulas, A. Ephremides, "Allocation of a single server to a set of parallel queues with time dependent demands," Proceedings of the Information Theory Symposium, pp. 208, Budapest , 1991.

1.2 Wireless ad-hoc networks: protocols, topology control and service discovery
1.2.1. L. Tassiulas, A. Ephremides, "Jointly optimal routing and scheduling in packet radio networks ,"  IEEE Transactions on Information Theory, Vol. 38, No. 1, pp. 165-168, January 1992.
1.2.2. T. Salonidis, P. Bahgwat, L. Tassiulas, R. Lamaire " Distributed topology construction of bluetooth personal area networks ," Proceedings of IEEE INFOCOM01, Anchorage , Alaska April 2001.
1.2.3. N. Johansson, U. Korner, L. Tassiulas, "A distributed s cheduling algorithm for a bluetooth scatternet ," Proceedings of International Teletraffic Congress 2001.
1.2.4.Ulas Kozat, Leandros Tassiulas "Network Layer Support for Service Discovery in Mobile Ad Hoc Networks ," Proceedings of IEEE INFOCOM03, San Francisco 2003.
1.2.5.Koushik Kar, Saswati Sarkar, Leandros Tassiulas, "Achieving Proportional Fairness using Local Information in Multihop Aloha Networks'' Proceedings of 41st Annual Allerton Conference on Communication, Control and Computing, Allerton , Monticello , Illinois , October 1-3, 2003
1.2.6.S. Chari, P. Kermani, S.W. Smith, L. Tassiulas "Security Issues in M-Commerce: A Usage-Based Taxonomy." Advances in E-Commerce Agents: Broking, Negotiation, Security and Mobility. Lecture Notes in Computer Science, LNAI 2033, pp 264-282, Springer-Verlag, 2001.
1.2.7.V. Tabatabaee, L. Tassiulas, "Optimal distributed routing in networks with randomly varying connectivity," Proceedings of the 34th Annual Allerton Conference on Communications, Control and Computing, Urbana , Illinois , 1996.
1.2.8. L. Tassiulas, A. Ephremides, J. Gunn, "Solving hard optimization problems arising in packet radio networks using Hopfield's net," Proceedings of the 23rd Annual Conference on Information Sciences and Systems, pp. 603-608, John Hopkins Univ., Baltimore MD, 1989.
1.2.9. L. Tassiulas, A. Ephremides, " Joint Routing and Scheduling in Multihop Packet Radio Networks," Proceedings of the 1st Bilkent Conference on Communications and Information Processing, Ankara , Turkey , 1989.
1.2.10. L. Tassiulas, A. Ephremides, " The effect of the transmission range on the throughput of a multihop radio network," in the Proceedings of the 25th Annual Conference on Information Sciences and Systems, pp. 718, Baltimore , 1991. Theodoros Salonidis Masters Thesis, University of Maryland College Park , 1999
 
1.3 Wireless ad-hoc networks: Quality of Service provisioning
In [1.3.2, 1.3.5] we present a methodology for providing QoS in wireless networks, that deals effectively with the main peculiarity of wireless networks, that differentiates them from their wireline counterparts, namely coordination of transmissions of neighboring interfering links. A distributed algorithm that does virtual bandwidth allocation to the different flows based on a token mechanism is provided. The algorithm is proven to be optimal, providing maxmin fair bandwidth allocation. In [1.3.4] end-to-end QoS provisioning is considered and a related algorithm that works in the multi-hop setting is provided. In [1.3.3, 1.3.6] a similar question of QoS provisioning has been investigated in a more general operating regime where the traffic is not pre-regulated and the scheduler may need to perform in conditions of overloading. In [1.3.1] we develop a technique for analyzing the performance of TCP sessions over wireless links with correlated losses and subsequently we use the technique to compare different TCP versions.
1.3.1. F. Anjum, L. Tassiulas , " Comparative study of various TCP versions over a wireless link with correlated losses ," IEEE/ACM Transactions on Networking , Vol.11 Is: 3 pp. 370 -383 June 2003.
1.3.2. L. Tassiulas, S. Sarkar , "Maxmin fair scheduling in wireless networks," Proceedings of IEEE INFOCOM02, NY,NY 2002.
1.3.3. Vagelis Tsibonis, Leonidas Georgiadis, Leandros Tassiulas "Exploiting Wireless Channel State Information for Throughput Maximization" Proceedings of IEEE INFOCOM03, San Francisco 2003 .
1.3.4. Saswati Sarkar, Leandros Tassiulas, "End-to-end bandwidth guarantees through fair local spectrum share in wireless ad-hoc networks,'' Proceedings of Conference on Decision and Control (CDC), 2003, Maui , Hawaii , December 9-12, 2003
1.3.5. S. Sarkar, L. Tassiulas, "Maxmin Fair Scheduling in Wireless Adhoc Networks," submitted to IEEE Journal on Selected Areas in Communications 2003.
1.3.6. Vagelis Tsibonis, Leonidas Georgiadis, Leandros Tassiulas " Exploiting Wireless Channel State Information for Throughput Maximization " submitted to IEEE Transactions on Information Theory 2003.
1.4 Smart antennas in wireless communication networks
1.4.1. J.H. Chang, L. Tassiulas, F.-R. Farrokhi, "Beamforming for maximum capacity in wireless networks with transmitter and receiver antenna arrays," IEEE Transactions on Wireless Communications, vol.1, no.1, pp 16-27, Jan. 2002.
1.4.2. F. Farrokhi,, L. Tassiulas, K.J.R. Liu, "Joint optimal power control and beamforming in wireless networks using antenna arrays,'' IEEE Transactions On Communications, pp.1313-1324, Vol 46, No. 10, Oct . 1998.
1.4.3. F. Farrokhi, K.J.R. Liu, L. Tassiulas, "Transmit beamforming and power control for cellular wireless systems," IEEE Journal on Selected Areas in Communications, Special issue on signal processing in wireless communications, Vol. 16, No. 8, pp. 1437-1450, 1998.
1.4.4. L. Tassiulas, "Null placement configurations for radio network capacity enhancement," Proceedings of the 8th IEEE Workshop on Statistical Signal and Array Processing, Corfu, Greece, June 1996.
1.4.5. F. Rashid-Farrokhi, L. Tassiulas, "Power control and space-time diversity for CDMA systems," Proceedings of IEEE GLOBECOM-98, November 1998.
1.4.6. A. Korakis, G, Yaklari, Leandros Tassiulas " A MAC protocol for full exploitation of Directional Antennas in Ad-hoc Wireless Networks," Proceedings of MobiHoc03, Annapolis , MD 2003.
1.4.7. Tianmin Ren, R. La, L. Tassiulas, " Optimal transmission scheduling with base station antenna array in cellular networks" Proceedings of IEEE INFOCOM04, Hong Kong 2004.
1.4.8. I. Koutsopoulos, Tianmin Ren L. Tassiulas, " The Impact of Space Division Multiplexing on Resource Allocation: A Unified Approach " Proceedings of IEEE INFOCOM03, San Francisco 2003.
1.4.9. Farrokh-Rashid Farrokhi, Combined Power Control and Space Time Diversity in Cellular Communications, Doctoral Dissertation, University of Maryland , College Park 1997
1.4.10. Jae-Hwan Chang Adaptive beamforming and energy efficient routing in wireless networks, Doctoral Dissertation, University of Maryland , College Park 2003.
 
1.5 Broadband wireless networks: cross-layer design approaches
1.5.1. I. Koutsopoulos, L. Tassiulas, " Channel state-adaptive techniques for throughput enhancement in wireless broadband networks ," Proceedings of IEEE INFOCOM01, Anchorage , Alaska April 2001.
1.5.2. I. Koutsopoulos, L. Tassiulas, " Adaptive Resource Allocation in SDMA- based Wireless Broadband Networks with OFDM Signaling," Proceedings of IEEE INFOCOM02, NY,NY 2002.
1.5.3. I. Koutsopoulos and L. Tassiulas, "Towards efficient Resource Allocation in Wireless Broadband networks using Adaptive Modulation techniques", Proceedings of ICC 2001.
1.5.4. U. Kozat I. Koutsopoulos, L. Tassiulas, " Dynamic Code Assignment and Spreading Gain Adaptation in Synchronous CDMA Wireless Networks ," Proceedings of International Symposium of Spread Spectrum Theory and Applications (ISSSTA), Prague , 2002.
1.5.5. U. Kozat, J. Koutsopoulos, L. Tassiulas, " A Framework for Cross-layer Design of Energy-efficient Communication with QoS Provisioning in Multi-hop Wireless Networks", roceedings of IEEE INFOCOM04, Hong Kong 2004
1.5.6. Goran Dimic, Nicholas D. Sidiropoulos, Leandros Tassiulas, "Wireless Networks with retransmission Diversity Access Mechanisms: Stable Throughput and Delay Properties", IEEE Transactions on Signal Processing Vol. 51 Is. 8 , pp. 2019 -2030 Aug. 2003
1.5.7. Iordanis Koutsopoulos Resource allocation issues in broadband wireless networks with OFDM signaling December 2002.
   
1.6 Wireless cellular networks: architectures, resource allocation and quality of service
1.6.1. S. Papavassiliou, L. Tassiulas, P. Tandon "Meeting QOS requirements in a cellular network with reuse partitioning,''  IEEE Journal on Selected Areas in Communications , Vol. 12, No. 8, pp. 1389-1401, October 1994.
1.6.2. F. Farrokhi, K.J.R. Liu, L. Tassiulas, "Downlink power control and base station assignment,''  IEEE Communications Letters , pp. 102-104, July 1997.
1.6.3. S. Papavassiliou, L. Tassiulas, "Joint optimal channel base station and power assignment for wireless access,''  IEEE/ACM Transactions on Networking , Vol. 4, no. 6, pp. 857-872, December 1996.
1.6.4. S. Papavassiliou, L. Tassiulas, "Improving the capacity in wireless networks through integrated channel, base station and power assignment,''  IEEE Transactions on Vehicular Technology , Vol. 47, No 2, pp. 417-427, May, 1998.
1.6.5. L. Tassiulas, "Efficient spectrum management for high capacity wireless networks," Proceedings of the 8th IEEE Workshop on Computer Communication, Del Mar, California , 1993. (invited)
1.6.6. L. Tassiulas, S. Weinstein , "Traffic forwarding by radio relay in personal communication networks," Proceedings of the 2nd International Conference on Universal Personal Communications, Ottawa , Canada , 1993.
1.6.7. P. Bhattacharya, L. Tassiulas, "An optimal channel allocation algorithm in a linear cellular reuse partitioning network," Proceedings of the IEEE workshop on Multiaccess, Mobility and Teletraffic for Personal Communications, Paris, France, May 1996.
1.6.8. Symeon Papavassiliou, Efficient Resource Allocation in High Capacity Wireless Networks, Doctoral Dissertation, Polytechnic University , New York , 1995
1.6.9. Puneet Tandon Masters Thesis Polytechnic University , New York , 1994
1.6.10. Svetlana Nadelson Cellular Systems Control Using Neural Networks Masters Thesis Polytechnic University , New York , 1995

1.7 Mobility tracking in cellular wireless networks
1.7.1. F. Anjum, L. Tassiulas , M. Shayman " Optimal paging for mobile location tracking ," to appear in the Advances in Performance Analysis , 2001.
1.7.2. Y. Mihalas, L. Tassiulas, "Multiuser paging policies in cellular wireless networks," Proceedings of the IEEE workshop on Multiaccess, Mobility and Teletraffic for Personal Communications, Washington DC , 1998.
1.7.3. L. Tassiulas, F. Anjum, "A hierarchical multiresolution registration structure for mobility tracking," Proceedings of the 5th International Conference on Universal Personal Communications, Boston, MA, September 1996.
1.7.4. L. Tassiulas, F. Anjum, "Location tracking mechanisms for optimal mobility adaptation," Proceedings of the 34th Annual Allerton Conference on Communications Control and Computing, Urbana , Illinois , 1996.
1.7.5. P. Kumar, L. Tassiulas, " Mobile multi-user ATM platforms: architectures, design issues and challenges," IEEE Networks Magazine , vol 14, no 2, pp.42-50, March 2000.
1.7.6. Yianni Michalas; Multi-user Paging Strategies for Increased Signaling Efficiency , Masters Thesis, University of Maryland College Park ,1998.
   
2. Sensor networks and energy conservation
2.1. J.H. Chang, L. Tassiulas, "Maximum life time routing in wireless sensor networks," to appear IEEE/ACM Transactions on Networking, 2003.
2.2. Koushik Kar, M. Kodialam, T. V. Lakshman, Leandros Tassiulas , " Routing for Network Capacity Maximization in Energy-constrained Ad-hoc Networks ," submitted to IEEE/ACM Transactions on Networking, 2003.
2.3. J.H. Chang, L. Tassiulas, " Energy Conserving Routing in Wireless Ad-hoc Networks ," Proceedings of IEEE INFOCOM00, Tel-Aviv , Israel , March 2000.
2.4. Koushik Kar, M. Kodialam, T. V. Lakshman, Leandros Tassiulas , " Routing for Network Capacity Maximization in Energy-constrained Ad-hoc Networks ," Proceedings of IEEE INFOCOM03, San Francisco 2003.
2.5. Jae-Hwan Chang Adaptive beamforming and energy efficient routing in wireless networks, Doctoral Dissertation, University of Maryland , College Park 2003.

3.1 Congestion control and Quality of Service provisioning in the INTERNET
3.1.1. L. Tassiulas, Y.C. Hung, S. Panwar, "Optimal buffer control during congestion in an ATM network node,''  IEEE/ACM Transactions on Networking,  Vol. 2, No. 4, pp. 374-396, August 1994.
3.1.2. L. Tassiulas, "Adaptive back-pressure congestion control based on local information,''  IEEE Transactions on Automatic Control, Vol. 40, No. 2, pp. 236-250, February 1995.
3.1.3. L. Tassiulas, A. Ephremides, "Throughput properties of a queueing network with distributed dynamic routing and flow control,"  Advances in Applied Probability,  Vol. 28, pp. 285-307, March 1996.
3.1.4. L. Tassiulas, "Push-forward link-level scheduling for network-wide performance,''  IEEE/ACM Transactions on Networking , Vol. 4, No. 3, pp. 398-407, June 1996.
3.1.5. L. Tassiulas, "Cut-through switching, pipelining and scheduling for network evacuation,''  IEEE/ACM Transactions on Networking , vol. 7, no 1, pp 88-97, February 1999.
3.1.6. P. Bhattacharya, L. Tassiulas, A. Ephremides, "Optimal scheduling with deadline constraints in tree networks,"  IEEE Transactions on Automatic Control , Vol. 42, No. 12, pp. 1703-1705, 1997.
3.1.7. G. Kesidis, L. Tassiulas, "Traffic shaping for a loss system," to appear in the IEEE Communication Letters , pp. 417-419, Dec 2000 .
3.1.8. F. Anjum, L. Tassiulas, "Fair bandwidth sharing among adaptive and non-adaptive flows in the Internet," Proceedings of IEEE INFOCOM99, New York , New York , March 1999.
3.1.9. K. Kar, S. Sarkar, L. Tassiulas, "Optimization Based Rate Control for Multipath Sessions" , Proceedings of Seventeenth International Teletraffic Congress (ITC), Salvador da Bahia, Brazil, December 2001 .

3.2 High speed switching: architectures algorithms and performance
3.2.1. V. Tabatabaae, L. Georgiadis, L. Tassiulas, "QoS Provisioning and Tracking Fluid Policies in Input Queueing Switches," IEEE/ACM Transactions on Networking , vol 9 no 5 pp 605-617, October 2001.
3.2.2 K. Kar, T.V. Lakshman, D. Stiliadis, L. Tassiulas " Scheduling Algorithms for Optical Packet Fabrics ." IEEE Journal on Selected Areas on Communications Special Issue on "High Performance Optical/Electronic Switches/Routers for High Speed Internet" Vol. 21 Issue: 7 , pp. 1143 -1155, Sept. 2003.
3.2.3. L. Tassiulas, "Linear complexity algorithms for maximum throughput in radio networks and input queuing switches", Proceedings of INFOCOM98, San Francisco, California, 1998.
3.2.4. Vahid Tabatabaee, Leandros Tassiulas , " MNCM a new class of efficient scheduling algorithms for input-buffered switches with no speedup ," Proceedings of IEEE INFOCOM03, San Francisco 2003.
3.2.5. L. Tassiulas, A. Ephremides, "Stability properties of constrained queueing systems and scheduling policies for maximum throughput in multihop radio networks,"  IEEE Transactions on Automatic Control, Vol. 37, No. 12, pp. 1936-1949, December 1992.  
3.2.6. Vahid Tabatabaee Scheduling and Rate Provisioning for Input-Buffered Cell Based Switch fabrics, Doctoral Dissertation, University of Maryland , College Park , 2003.
3.2.7. Koushik Kar, Masters Thesis, University of Maryland , College Park , 2001.
 
3.3 Ring Networks: architectures control and management
3.3.1. L. Tassiulas, J. Joung, ''Performance measures and scheduling policies in ring networks,''  IEEE/ACM Transactions on Networking , Vol. 3, pp. 576-584, 1995.
3.3.2. L. Tassiulas, L. Georgiadis, "Any work-conserving policy stabilizes the ring with spatial reuse,''  IEEE/ACM Transactions on Networking,  Vol. 4, No. 2, pp. 205-208, April 1996.
3.3.3. L. Georgiadis, W. Szpankowski, L. Tassiulas, "A scheduling policy with maximal stability region for ring networks with spatial reuse,''  Queueing Systems: Theory and Applications, Vol. 19, pp. 131-148, October 1995.
3.3.4. L. Georgiadis, W. Szpankowski, L. Tassiulas, "Stability analysis of quota allocation access protocols in ring networks with spatial reuse,''  IEEE Transactions on Information Theory, Vol. 43, No. 3, pp. 923-937, May 1997.
 
3.4 Multicasting: architectures, routing and congestion control
3.4.1. S. Sarkar , L. Tassiulas, "A framework for routing and congestion control for multicast information flows," to appear in the IEEE Transactions on Information Theory , 2001 . (short version appeared in INFOCOM 99)
3.4.2. S. Sarkar, L. Tassiulas, "Layered bandwidth allocation for multicasting of hierarchically encoded sources," to appear in the IEEE Transactions on Computers , 2004.
3.4.3. S. Sarkar, L. Tassiulas, "Fair distributed congestion control in multirate multicast networks," to appear in the IEEE/ACM Transactions on Networking , 2002. (short version appeared in INFOCOM 2000).
3.4.4. S. Sarkar , L. Tassiulas, "Fair allocation of utilities in multirate multicast network: a framework for unifying diverse fairness objectives," IEEE Transactions on Automatic Control , vol. 47, no. 6, pp 931-944, June 2002.
3.4.5. K. Kar, S. Sarkar, L. Tassiulas, " A Scalable, Low-Overhead Rate Control Algorithm for Multirate Multicast Sessions," IEEE Journal on Selected Areas on Communications Special Issue on Network Support for Multicast Communications, vol 20, no 8, October 2002.
3.4.6. S. Sarkar, T. Ren, L. Tassiulas, "An Asynchronous Distributed Algorithm for Computation of Fair Rates in Multirate Multicast Trees" submitted to the IEEE Transactions on Parallel and Distributed Systems
3.4.7. Saswati Sarkar, Leandros Tassiulas, "Scheduling for Fair Allocation of Rates in Multirate Multicast Networks,'' Proceedings of International Symposium on Information Theory, 2000.
3.4.8. S. Sarkar, L. Tassiulas, " Back-pressure based multicast scheduling for fair bandwidth allocation ," Proceedings of IEEE INFOCOM01, Anchorage , Alaska April 2001.
3.4.9. K. Kar, S. Sarkar , L. Tassiulas, " A simple rate control algorithm for maximizing total user utillity ," Proceedings of IEEE INFOCOM01, Anchorage , Alaska April 2001.
3.4.10. K. Kar, S. Sarkar , L. Tassiulas, " Optimization based rate control for multirate multicast sessions ," Proceedings of IEEE INFOCOM01, Anchorage , Alaska April 2001.
3.4.11. S. Sarkar, T. Ren, L. Tassiulas, "Achieving fairness in multicasting with almost stateless rate control" Proceedings of the conference on "Scalability and Traffic Control in IP Networks" SPIE, ITcom 2002.
3.4.12. K. Kar, L. Tassiulas, " Dual Based Multicast Rate Control with Discrete Bandwidth Constraints" Proceedings of 41st Annual Allerton Conference on Communication, Control and Computing, Allerton , Monticello , Illinois , October 1-3, 2003 .
3.4.13. Saswati Sarkar, Fair Resource Allocation in Multicast Networks , Doctoral Dissertation, University of Maryland , College Park 2000.
3.4.14. Koushik Kar, Scalable Low Overhead Rate Control Algorithms for Aggregate Utility Maximization , Doctoral Dissertation, University of Maryland, College Park 2002..
 
3.5 Information delivery in the internet by broadcasting methods
3.5.1. C.J. Su, L. Tassiulas, "Joint Broadcast Scheduling and User's Cache Management for Efficient Information Delivery," in ACM Journal on Wireless Networks , pp 279-288, vol 6, 4, 2000.
3.5.2. L. Tassiulas, C.J. Su, "Optimal memory management strategies for a mobile user in a broadcast data delivery system,''  IEEE Journal on Selected Areas in Communications , Vol. 15, No 7, pp. 1226-1238, 1997.
3.5.3. C.J. Su, L. Tassiulas, V. Tsotras, "Broadcast scheduling for information distribution''  ACM Journal on Wireless Networks , Vol. 5, No. 2, pp. 137-147, 1999.
3.5.4. L. Tassiulas, C.J. Su, "Information delivery through broadcasting in satellite communication networks'' Automatica , special issue on Control Methods in Communication Networks, Vol. 35, 12, p. 2013-2030, December, 1999.
3.5.5 O. Ercetin, L. Tassiulas, "Push based information delivery in two-stage satellite-terrestrial wireless systems," IEEE Transactions on Computers , vol 50 pp 506-518, May 2001.
3.5.6. C.J. Su, L. Tassiulas, "Broadcast scheduling for information distribution," Proceedings of INFOCOM97, Kobe , Japan , 1997.
3.5.7. C.J. Su, L. Tassiulas, " Mobile user's memory management to minimize deadline misses of users requests in a data broadcasting system," Proceedings of 15th International Teletraffic Congress, pp. 223-232, June 1997.
3.5.8. C.J. Su, L. Tassiulas, "Joint broadcast scheduling and user's cache management for efficient information delivery," Proceedings of 4 th ACM/IEEE International Conference on Mobile Computing and Networking, MOBICOM98, 1998.
3.5.9. Chi-Jiun Su, Information Dissemination Through Broadcast Delivery. Doctoral Dissertation, Polytechnic University , New York January 1998.
3.5.10. Ozgur Ercetin " Information Delivery in Two-Stage Satellite-Terrestrial Wireless Networks" , Masters Thesis, University of Maryland College Park ,1998.

4. Performance based network management tools
4.1. P. Sarachik, S. Panwar, P. Liang, S. Papavassiliou, D. Tsaih, L. Tassiulas, ''A Modeling approach for the performance management of high speed networks,'' in Network Management and Control , Vol. 2, pp. 149-163, Edited by I.T. Frisch et al., Plenum Press, 1994. (book chapter)
4.2. D. Tsaih, G. Lapiotis, S. Panwar, L. Tassiulas, "A model-based performance management tool for ATM and frame-relay networks," Journal of Network and Systems Management , vol 6, no 4, pp399-428 December 1998. 
4.3. Y.T. Hou, L.Tassiulas, H.J. Chao, "Overview of implementing ATM-based enterprise local area network for desktop multimedia computing,''  IEEE Communications Magazine , Vol. 34, no. 4, pp. 70-76, April 1996.
5.1 Mobile satellite communication networks
5.1.1. J. Koutsopoulos, L. Tassiulas, "Carrier Grouping for Half-duplex Communication in GSM-based MEO mobile satellite networks," IEEE Transactions on Wireless Communications, vol.1, no.2, pp 342-351, Jan. 2002.
5.1.2. O. Ercetin, S. Krishnamurthy , S. Dao , L. Tassiulas, " A Predictive Quality of Service Routing Scheme for Broadband LEO Satellite Networks ," Computer Networks, 2002 (to appear).
5.1.3. L. Tassiulas, S. Papavassiliou , "A dynamic scheduling problem in packet switched satellite networks," Proceedings of the 33rd CDC, Lake Buena Vista , Florida , 1994.
5.1.4. J. Koutsopoulos, L. Tassiulas, "A unified framework for the study of handover prediction an resource allocation in non-geostationary mobile satellite networks," Proceedings of Vehicular Technology Conference, October 1999.
5.1.5. Iordanis Koutsopoulos Masters Thesis, Univeristy of Maryland College Park , 1999
 
5.2 Communication systems for air-traffic control
5.2.1. O. Ercetin, M. Ball, A. Trani, L. Tassiulas, "Next Generation Satellite Systems for Aeronautical Communications", to appear International Journal of Satellite Communications 2003.
5.2.2 O. Ercetin, M. Ball, A. Trani, L. Tassiulas, "Delivering Real-Time Weather Maps to Aircraft by Hybrid Unicast/Broadcast LEO/GEO Satellite Communications", submitted to IEEE Transactions on Aerospace and Electronic Systems 2002.
 
6. Vehicle routing techniques in transportation problems

6.1. L. Tassiulas, " Adaptive routing on the plane,''  Operations Research , Vol. 44, No. 6, Sept.-Oct. pp 171-179, 1996.
6.2. L. Tassiulas, "Worst case length of nearest neighbor tours for the Euclidean traveling salesman problem,''  SIAM J. Discrete Math ., Vol. 10, No. 2, pp 171-179, May 1997.
 

 

 

 

 

 

 

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