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Researchers at UCD

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Liam Murphy

Prof of Computer Science & Informatics

School Of Computer Science & Informatics
Comp Science and Informatics
Belfield
Dublin 4

Tel: +353 1 7162914
Email: liam.murphy@ucd.ie

Biography

Prof. Liam Murphy received a B.E. in Electrical Engineering from University College Dublin in 1985, and an M.Sc. and Ph.D. in Electrical Engineering and Computer Sciences from the University of California, Berkeley in 1988 and 1992 respectively. He is currently a Professor in Computer Science & Informatics at University College Dublin, where he is Director of the Performance Engineering Laboratory. Prof. Murphy has published almost 150 refereed journal and conference papers on various topics, including multimedia transmissions, dynamic and adaptive resource allocation algorithms in computer/communication networks, and software development. His current research projects involve computer network convergence and software performance engineering. Prof. Murphy is a Member of the IEEE (Communications, Broadcasting, and Computer societies) and a Fellow of the Irish Computer Society.

Professional

Honours and Awards

Year: 2007.
Title: Fellow
Year: 2005.
Title: Faculty Fellow
Year: 2004.
Title: Conference Paper Award
Year: 2002.
Title: Best Student Poster Paper
Year: 2001.
Title: Best Paper

Associations

Association: Irish Computer Society, Function/Role: Fellow
Association: IEEE (Computer, Communications, and Broadcasting Societies), Function/Role: Member,
Association: IEI, Function/Role: Member,
       

Committees

Committee : IEEE Transactions on Broadcasting Editorial Board
Committee : IEEE Communications Surveys and Tutorials Editorial Board
Committee : 9th IFIP/IEEE International Conference on Management of Multimedia and Mobile Networks and Services (MMNS 2006)
Committee : International Conference on Software Engineering Advances (ICSEA 2006)
Committee : IEEE 65th Vehicular Technology Conference (VTC 2007 Spring)
Committee : 2007 IRMA International Conference
Committee : 5th International Conference on Wired/Wireless Internet Communications (WWIC 2007)
Committee : 17th ACM International workshop on Network and Operating Systems Support for Digital Audio & Video (NOSSDAV 2007)
Committee : IEEE International Conference on Communications (ICC 2007) Wireless Communications Symposium
Committee : First International Workshop on Tracking Computing Technologies (TRACK 2007)
Committee : International Symposium on Multimedia over Wireless (ISMW) 2007
Committee : 2nd International Conference on Software Engineering Advances (ICSEA 2007)
Committee : 3rd International Mobile Multimedia Communications Conference (MobiMedia 2007)
Committee : ACM Multimedia 2007 ¿ Systems Track
Committee : CASCON 2007 Symposium on Software and Systems Engineering Symposium
Committee : 10th International Conference on Management of Multimedia and Mobile Networks and Services (MMNS 2007)
Committee : 4th International Conference on Innovations in Information Technology (Innovations'07)
Committee : IEEE Globecom 2007 Internet Protocol Symposium
Committee : 5th IEEE Consumer Communications and Networking Conference (CCNC 2008)
Committee : 6th International Conference on Wired/Wireless Internet Communications (WWIC 2008)
Committee : 7th Workshop on Software and Performance (WOSP 2008)
Committee : 3rd International Conference on Digital Telecommunications (ICDT 2008)
Committee : 17th International Conference on Computer Communications and Networks (ICCCN '08) ¿ Multimedia Networking track
Committee : 3rd International Conference on Software Engineering Advances (ICSEA 2008)

Employment

Employer: UCD
Position: Senior Lecturer
Employer: UCD
Position: College Lecturer
Employer: Dublin City University
Position: Lecturer in Electronic Engineering and Telecommunications
Employer: Auburn University
Position: Assistant Professor of Computer Science and Engineering
Employer: University of California, Berkeley
Position: Visiting Lecturer
Employer: University of California, Berkeley
Position: Graduate Research Assistant
Employer: University of California, Berkeley
Position: Graduate Teaching Assistant
Employer: University College Dublin
Position: Research Engineer
Employer: UCD
Position: Associate Professor

Education

Year 1992 Institution: University of California, Berkeley, CA
Qualification: PhD Subject:
Year 1988 Institution: University of California, Berkeley, CA
Qualification: MSc Subject:
Year 1985 Institution: University College Dublin
Qualification: BE Subject:
         

Publications

 

Book Chapters

Y. Yu, V. Genc, S. Murphy, L. Murphy; (2009) 'Network Planning for IEEE 802.16j Relay Networks' In: Y. Zhang (eds). WiMAX Network Planning and Optimization. New York: Auerbach Publications. [Details]
O. Ashagi, S. Murphy, L. Murphy; (2008) 'Interference Mitigation in License-exempt 802.16 Systems: a distributed approach' In: Y. Zhang, L. T. Yang, J. Ma (eds). Unlicensed Mobile Access Technology: Protocols, Architectures, Security, Standards and Applications. New York: Auerbach Publications, Taylor&Francis Group. [Details]
N. Cranley and L. Murphy; (2006) 'Incorporating User Perception in Adaptive Video Streaming Systems' In: Digital Multimedia Perception and Design. *: Idea Group. [Details]
J. MacKie-Mason, L. Murphy and J. Murphy; (1997) 'Responsive Pricing in the Internet' In: MIT Press (eds). Internet Economics. [Details]
L. Murphy and J. Murphy; (1996) 'Feedback and Pricing in ATM networks' In: Chapman and Hall (eds). ATM Networks: Performance Modelling and Evaluation. [Details]

Edited Books

N. Cranley, L. Murphy (Ed.). (2008) Wireless Multimedia: Quality of Service and Solutions. Hershey, PA: IGI Global. [Details]

Peer Reviewed Journals

Hnetynka, P., Murphy, L. and Murphy, J.; (2011) 'Comparing the Service Component Architecture and Fractal Component Model'. Computer Journal, 54 (7):1026-1037. Available Online [DOI] [Details]
P. McGovern, P. Perry, S. Murphy, L. Murphy; (2010) 'Endpoint Based Call Admission Control and Resource Management for VoWLAN'. IEEE Transactions on Mobile Computing, . [Details]
H. Melvin, L. Murphy; (2010) 'Synchronisation of Multimedia Streams: Benefits, Challenges and Solutions'. Recent Patents on Computer Science, . [Details]
S. Fallon, P. Jacob, Y. Qiao, L. Murphy; (2010) 'A unified notification service utilizing explicit wireless degradation notifications'. IEEE Communications Letters, 14 (7):679-681. [Details]
S. Robitzsch, J. Fitzpatrick, S. Murphy, L. Murphy; (2010) 'Behind-the-Scenes of IEEE 802.11a based Multi-Radio Mesh Networks: A Measurement driven Evaluation of Inter-Channel Interference'. IARIA International Journal on Advances in Internet Technology, 3 (1&2). [Details]
Y. Qiao, E. Fallon, J. Murphy, L. Murphy, Z. Shi and A. Hanley; (2009) 'Transmission Scheduling for Multi-homed Transport Protocols with Network Failure Tolerance'. Telecommunication Systems Journal, . [Details]
G. Cunningham, P. Perry, J. Murphy and L. Murphy; (2009) 'Seamless Handover of IPTV Streams in a Wireless LAN Network'. IEEE Transactions on Broadcasting, . [Details]
A. Nafaa, S. Murphy, L. Murphy; (2008) 'Analysis of a Large-Scale VOD Architecture for Broadband Operators: A P2P-Based Solution'. IEEE Communications Magazine, 46 (12):47-55. [Details]
Y. Qiao, E. Fallon, J. Murphy, L. Murphy, X. Zhu, G. Hayes, A. Matthews, A. Hanley; (2008) 'Performance Analysis of Multi-homed Transport Protocols with Network Failure Tolerance'. IEE PROCEEDINGS-COMMUNICATIONS, 2 (2):336-345. [Details]
A. Nafaa, T. Taleb and L. Murphy; (2008) 'Forward Error Correction Strategies for Media Streaming over Wireless Networks'. IEEE Communications Magazine, 46 (1):72-79. [Details]
T. Taleb, A. Nafaa, L. Murphy, K. Hashimoto, N. Kato and Y. Nemoto; (2007) 'Toward Efficient Service-Level QoS Provisioning in Large-Scale 802.11-Based Networks'. IEEE Network, 21 (5):42-48. [Details]
G. Muntean, P. Perry and L. Murphy; (2005) 'Objective and Subjective Evaluation of QOAS Video Streaming over Broadband Networks'. IEEE Electronic Trans. on Network & Service Management, 2 (1). [Details]
G. Muntean, P. Perry and L. Murphy; (2007) 'A Comparison-Based Study of Quality-Oriented Video on Demand'. IEEE TRANSACTIONS ON BROADCASTING, 53 (1):92-102. [Details]
Cranley, N., Perry, P. Murphy, L.; (2007) 'Dynamic Content-Based Adaptation of Streamed Multimedia'. Intelligence-based Adaptation for Ubiquitous Multimedia Communications: Special issue of the Journal of Network and Computer Applications, 30 (3):983-1006. [Details]
Cranley, N; Perry, P; Murphy, L; ; (2006) 'User perception of adapting video quality'. INTERNATIONAL JOURNAL OF HUMAN-COMPUTER STUDIES, 64 (8):637-647. [Details]
Narbutt, M; Kelly, A; Murphy, L; Perry, P; ; (2005) 'Adaptive VoIP playout scheduling: Assessing user satisfaction'. IEEE INTERNET COMPUTING, 9 (4):28-34. [Details]
Muntean, GM; Perry, P; Murphy, L; ; (2005) 'Subjective assessment of the quality-oriented adaptive scheme'. IEEE TRANSACTIONS ON BROADCASTING, 51 (3):276-286. [Details]
A. Oufimtsev and L. Murphy; (2005) 'Method Input Parameters and Performance of EJB Applications'. STUDIA INFORMATICA UNIVERSALIS, 4 (1):41-52. [Details]
Cranley, N; Perry, P; Murphy, L; ; (2005) 'Optimum adaptation trajectories for streamed multimedia'. MULTIMEDIA SYSTEMS, 10 (5):392-401. [Details]
Muntean, GM; Perry, P; Murphy, L; ; (2004) 'A new adaptive multimedia streaming system for All-IP multi-service networks'. IEEE Transactions on Broadcasting, 50 (1):1-10. [Details]
Narbutt, M; Murphy, L; ; (2004) 'Improving voice over IP subjective call quality'. IEEE COMMUNICATIONS LETTERS, 8 (5):308-310. [Details]
Muntean, G., Perry, P., Murphy, L.; (2004) 'Performance Comparison of Local Area Video Streaming Systems'. IEEE Communications Letters, 8 (5):326-328. [Details]
Muntean, GM; Perry, P; Murphy, L; ; (2003) 'Quality-oriented adaptation scheme for video-on-demand'. ELECTRONICS LETTERS, 39 (23):1689-1690. [Details]
Melvin, H; Murphy, L; ; (2002) 'TIme synchronization for VoIP quality of service'. IEEE INTERNET COMPUTING, 6 (3):57-63. [Details]
K. Chang, L. Murphy, J. Fouss, T. Dollar, B. Lee and Y. Chang,; (1998) 'Software Development and Integration in a Computer Supported Cooperative Work Environment'. Software- Practice and Experience, 28 (6):657-679. [Details]
Lun S.M., Lo T., Wu F.F., Murphy, L., Sen, A.; (1996) 'LANSIM and its Applications to Distributed EMS'. IEEE Transactions in Power Systems, 11 (3):1159-1165. [Details]
J. MacKie-Mason, L. Murphy and J. Murphy; (1996) 'The Role of Responsive Pricing in the Internet'. Journal of Electronic Publishing: Special Issue on Internet Economics . [Details]
D. M. Falcao, F. F. Wu and L. Murphy; (1995) 'Parallel and Distributed State Estimation'. IEEE Transactions on Power Systems, 10 (2):724-730. [Details]
L. Murphy, R. J. Kaye and F. F. Wu,; (1994) 'Distributed Spot Pricing in Radial Distribution Systems'. IEEE Transactions in Power Systems, 9 (1):311-317. [Details]
J. Murphy and L. Murphy,; (1994) 'Bandwidth Allocation By Pricing In ATM Networks'. Ifip Transactions C: Communications Systems, C-24 :333-351. [Details]
L. Murphy and F. F. Wu,; (1993) 'An Open Design Approach for Distributed Energy Management Systems'. IEEE Transactions in Power Systems, 8 (3):1172-1179. [Details]
S. Lumetta, L. Murphy, X. Li, D. Culler and I. Khalil,; (1993) 'Decentralized Optimal Power Pricing: The Development of a Parallel Program'. IEEE Parallel and Distributed Technology, 1 (4):23-31. [Details]
 

Conference Publications

C. Thorpe, S. Murphy, L. Murphy; (2011) IEEE802.11k Enabled Adaptive Carrier Sense Management Mechanism (KAPCS2) 12th IFIP/IEEE International Symposium on Integrated Network Management (IM 2011) Dublin, Ireland, [Details]
C. Olariu, M. O Foghlu, P. Perry, L. Murphy; (2011) VoIP Quality Monitoring in LTE Femtocells 12th IFIP/IEEE International Symposium on Integrated Network Management (IM 2011) Dublin, Ireland, [Details]
A. Nafaa, M. Gaucher, L. Murphy; (2010) RS-VOD: Reliable and Scalable VOD Services Provisioning System Using P2P Retransmissions IEEE Globecom 2010 Miami, Florida, USA, [Details]
S. Maurina, J. Fitzpatrick, L. Trifan, L. Murphy; (2010) An Enhanced Bridged-Based Multi-hop Wireless Network Implementation 5th ICST Wireless Internet Conference (WICON 2010) Singapore, [Details]
Fallon, E., Qiao, Y., Murphy, L., Murphy, J. and Muntean, G.; (2010) SOLTA ¿ A Service Oriented Link Triggering Algorithm for MIH Implementations 6th International Wireless Communications and Mobile Computing Conference (IWCMC 2010)  , pp.1146-1150 [Details]
Y. Hadjadj-Aoul, S. Murphy, L. Murphy; (2009) A bridging-based solution for efficient multicast support in wireless mesh networks Proc. 2nd IEEE International Workshop on Wireless & Internet Services (WISe 09), held in conjunction with 34th IEEE Conference on Local Computer Networks (LCN 2009) Zurich, Switzerland, , pp.971-976 [Details]
Qiao, Y., Fallon, E., Murphy, J., Murphy, L. and Hanley, A. ; (2008) Path Selection of SCTP Fast Retransmission in Multi-homed Wireless Environments 13th IFIP International Conference on Personal Wireless Communications, PWC 2008 , pp.447-458 [Details]
Ufimtsev, A. Murphy, L.; (2006) Automatic System for Linux Kernel Performance Testing Proc. 2006 Linux Symposium [Details]
Xu, J., Oufimtsev, A., Woodside, M. Murphy, L.; (2005) Performance Modeling and Prediction of Enterprise JavaBeans with Layered Queuing Network Templates Proc. ACM Workshop on Specification and Verification of Component-Based Systems (SAVCBS 2005) [Details]
Ufimtsev, A, Kucharenka, A, Murphy, L, ; (2006) Impact of virtual memory managers on performance of J2EE applications 9th International Symposium on Component-Based Software Engineering (CBSE 2006) , pp.285-293 [DOI] [Details]
Muntean, GM, Perry, P, Murphy, L, ; (2004) Performance assessment of the quality-oriented adaptation scheme 7th IFIP/IEEE International Conference on Management of Multimedia Networks and Services (MMNS 2004); and in Lecture Notes in Computer Science, vol. 3271/2004 , pp.50-62 [Details]
Cranley, N, Murphy, L, Perry, P, ; (2004) Content-based adaptation of streamed multimedia 7th IFIP/IEEE International Conference on Management of Multimedia Networks and Services (MMNS 2004); and in Lecture Notes in Computer Science, vol. 3271/2004 , pp.39-49 [Details]
Muntean, GM, Murphy, L, ; (2001) Feedback-controlled traffic shaping for multimedia transmissions in a real-time client-server system ICN¿01: International Conference on Networking, Colmar, France; and in Lecture Notes in Computer Science, vol. 2093/2001 , pp.540-548 [Details]
Y. Yu, S. Murphy and L. Murphy; (2010) Planning Base Station and Relay Station Locations for IEEE 802.16j Network with Capacity Constraints 7th IEEE Consumer Communications and Networking Conference (CCNC 2010) [Details]
S. Fallon, P. Jacob, Y. Qiao, A. Hanley and L. Murphy; (2009) Using 802.11 MAC Retransmissions for Path Selection in Multi-homed Transport Layer Protocols IEEE Globecom 2009 [Details]
C. Lamoriniere, A. Nafaa and L. Murphy; (2009) Dynamic Switching Between Adaptive FEC Protocols For Multi-Source Streaming IEEE Globecom 2009 [Details]
C. Thorpe, S. Murphy and L. Murphy; (2009) IEEE802.11k Enabled Adaptive Physical Carrier Sense Mechanism for Wireless Networks (K-APCS) 12th ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems (MSWiM 2009) [Details]
Y. Yu, S. Murphy and L. Murphy; (2009) Interference Aware Relay Station Location Planning for IEEE 802.16j Mobile Multi-hop Relay Network 12th ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems (MSWiM 2009) [Details]
E. Fallon, L. Murphy and J. Murphy; (2009) Optimizing Metropolitan Area Wireless Path Selection Using Media Independent Handover 2nd International Workshop on Cross Layer Design (IWCLD 2009) [Details]
S. Fallon, P. Jacob, Y. Qiao and L. Murphy; (2009) An Adaptive Optimized RTO Algorithm for Multi-homed Wireless Environments 7th International Conference on Wired/Wireless Internet Communications (WWIC 2009); and in Lecture Notes in Computer Science, Volume 5546/2009, Springer Berlin/Heidelberg, pp. 133-145 [Details]
P. McDonagh, P. Perry and L. Murphy; (2009) QoS-Aware IPTV Routing Algorithms 9th Information Technology & Telecommunications Conference (IT&T 2009) [Details]
E. Fallon, J. Murphy, L. Murphy, Y. Qiao, X. Xie and A.Hanley; (2007) Towards a Media Independent Handover Based Approach to Heterogeneous Network Mobility Proc. Irish Signals and Systems Conference 2007, University of Ulster Magee Campus, Derry, Northern Ireland, September 13-14, 2007 [Details]
J. Bergin and L. Murphy; (2007) Reducing Runtime Complexity of Long-Running Application Services via Dynamic Profiling Proc. Workshop on Automating Service Quality (WRASQ), Co-Located with ASE 2007, Atlanta, Georgia, USA, November 6, 2007 [Details]
L. Murphy, J. Noonan, P. Perry and J. Murphy; (2007) An Application-quality-based Mobility Management Scheme Proc. 9th IFIP/IEEE International Conference on Mobile and Wireless Communications Networks (MWCN 2007), Cork, Ireland, September 19-21, 2007 , 19-SEP-07 - 21-SEP-07 [Details]
E. Fallon, L. Murphy, J. Murphy; (2008) An Analysis of the Performance of an MIH Based Switch Strategy for Heterogeneous Network Mobility ICT-MobileSummit 2008 [Details]
S. Fallon, P. Jacob, Y. Qiao, L. Murphy, E. Fallon, A. Hanley; (2008) An Analysis of Alterations to the SCTP RTO Calculation Mechanism for WLAN Environments 10th IFIP International Conference on Mobile and Wireless Communications Networks (MWCN 2008) [Details]
C. Thorpe, S. Murphy, L. Murphy; (2008) Analysis of Variation in IEEE802.11k Channel Load Measurements for Neighbouring WLAN Systems ICT-MobileSummit 2008 [Details]
Y. Yu, S. Murphy, L. Murphy; (2008) A Clustering Approach to Planning Base Station and Relay Station Locations in IEEE 802.16j Multi-hop Relay Networks IEEE International Conference on Communications (ICC 2008) [Details]
Y. Yu, S. Murphy and L. Murphy; (2008) Planning Base Station and Relay Station Locations in IEEE 802.16j Multi-hop Relay Networks Proc. 2nd IEEE Broadband Wireless Access Workshop, colocated with IEEE CCNC 2008 [Details]
S. Fallon, P. Jacob, Y. Qiao, L. Murphy, E. Fallon and A. Hanley; (2008) SCTP Switchover Performance Issues in WLAN Environments Proc. 5th IEEE Consumer Communications and Networking Conference (CCNC 2008) [Details]
E. Fallon, J. Murphy, L. Murphy, Y. Qiao, X. Xie and A. Hanley; (2007) Towards a Media Independent Handover Based Approach to Heterogeneous Network Mobility Proc. Irish Signals and Systems Conference 2007 [Details]
O. Ashagi, S. Murphy and L. Murphy; (2007) Centralised Approaches to Subcarrier Allocation for OFDM-based 802.16 Systems Operating in License-exempt Mode Proc. 2nd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2007) [Details]
A. Ufimtsev and L. Murphy; (2006) Performance Modelling of a JavaEE Component Application using Layered Queuing Networks: Revised Approach and a Case Study Proc. Specification and Verification of Component-Based Systems (SAVCBS'06) Workshop at ACM SIGSOFT 2006/FSE-14 [Details]
Ashagi, O; Murphy, S; Murphy, L; ; (2005) Mitigating Interference between IEEE 802.16 Systems Operating in License-exempt Mode Proc. 3rd International Conference on Wired/Wireless Internet Communications , pp.300-311 [Details]
S. Murphy, S. Goor, and L. Murphy; (2005) Performance comparison of multiplexing techniques for MPEG-4 object-based content Proc. IEEE International Workshop on Multimedia Systems and Networking (WMSN'05) [Details]
S. Murphy, M. Searles, C. Rambeau and L. Murphy; (2004) Evaluating the Impact of Network Performance on Video Streaming Quality for Categorised Video Content Proc. 14th International Packet Video Workshop [Details]
S. Goor, S. Murphy and L. Murphy; (2004) Experimental Performance Analysis of RTP-Based Transmission Techniques for MPEG-4 Proc. 14th International Packet Video Workshop [Details]
N. Dumitrascu, S. Murphy and L. Murphy; (2003) A Methodology for Predicting the Performance of Component-Based Applications Proc. WCOP 2003: Eighth International Workshop on Component-Oriented Programming [Details]
N. Cranley, P. Perry and L. Murphy; (2003) User-Perceived Quality-Aware Adaptive Delivery of MPEG-4 Content Proc. NOSSDAV 2003 [Details]
N. Cranley and L. Murphy; (2001) Adaptive Quality of Service for Streamed MPEG-4 over the Internet Proceedings of the 17th IEE UK Teletraffic Symposium , pp.16/1-16/6 [Details]
M. Narbutt and L. Murphy; (2001) Adaptive Playout Buffering for Audio/Video transmission over the Internet Proceedings of the 17th IEE UK Teletraffic Symposium , pp.27/1-27/6 [Details]
G. Muntean and L. Murphy; (2001) Experimental Results for a Feedback-Controlled Multimedia Transmission System Proceedings of the 17th IEE UK Teletraffic Symposium , pp.15/1-15/6 [Details]
T. Dollar, L. Murphy, K. Chang, B. Lee, Y. Chang and J. Fouss; (1997) Supporting Document Organization and Security in Distributed Collaborative Authoring Systems Through the Use of Collaborations Proceedings of the 35th ACM Southeast Conference , pp.208-210 [Details]
K. Chang, L. Murphy, B. Lee, T. Dollar, Y. Chang and J. Fouss; (1997) Design and Model for a Computer Supported Cooperative Environment for CASE and CAD Applications Proceedings of the 35th ACM Southeast Conference , pp.191-198 [Details]
McGovern, P., Chung, S., Murphy, S. Murphy, L.; (2006) Endpoint Admission Control for VoIPoWLAN Proc. 13th International Conference of Telecommunications [Details]
McGovern, P., Murphy, S. Murphy, L.; (2006) Protection Against Link Adaptation for VoWLAN Proc. 15th IST Mobile & Wireless Communications Summit [Details]
Hanley, G. Murphy, S. Murphy, L.; (2005) Adapting WLAN MAC Parameters to Maximise VoIP Call Capacity Proc. 8th ACM/IEEE International Symposium on Modeling, Analysis and Simulation of Wireless and Mobile Systems [Details]
Hanley, G. Murphy, S. Murphy, L.; (2005) Performance of VOIP over IEEE 802.11g DSSS-OFDM Mode with IEEE 802.11e QOS Support Proc. 2nd International Conference on E-Business and Telecommunication Networks [Details]
Melvin, H. Murphy, L.; (2005) Synchronisation of Internet Multimedia Streams: Some Issues and Solutions Proc. 26th IEEE Real-Time Systems Symposium [Details]
O. Ashagi, S. Murphy and L. Murphy; (2007) Distributed Approach to Interference Mitigation between OFDM-based 802.16 Systems Operating in License-exempt Spectrum IEEE International Conference on Communications (ICC 2007) Wireless Communications Symposium [Details]
Y. Qiao, E. Fallon, L. Murphy, J. Murphy, A. Hanley, X. Zhu1, A. Matthews and E. Conway; (2007) SCTP Performance Issue on Path Delay Differential 5th International Conference on Wireless/Wired Internet Communications (WWIC 2007) [Details]
P. McGovern, S. Murphy and L. Murphy; (2006) Addressing the Link Adaptation Problem for VoWLAN using Codec Adaptation Proc. IEEE Globecom 2006 - Wireless Communications and Networking San Francisco, CA, [Details]
C. Thorpe, S. Murphy and L. Murphy; (2006) Seamless Handover in Heterogeneous Radio Access Networks Proc. 6th IT&T Conference Carlow, Ireland, [Details]
A. Ufimtsev, T. Parsons, L. Patcas, J. Murphy and L. Murphy; (2006) Introducing Performance Engineering by means of Tools and Practical Exercises Proc. CASCON 2006 Dublin Symposium, in association with CASCON 2006: 16th Annual International Conference on Computer Science and Software Engineering IBM Dublin Center for Advanced Studies, Ireland, [Details]
C. Thorpe and L. Murphy; (2006) A Survey of Seamless Handover in Heterogeneous Radio Access Networks Proc. 9th ACM/IEEE International Symposium on Modeling, Analysis and Simulation of Wireless and Mobile Systems (MSWiM 2006) Malaga, Spain, [Details]
H. Jerome and L. Murphy; (1996) A Soft Bandwidth Reservation Protocol for Non-Real-Time Traffic in ATM Local Area Networks Proceedings of the IASTED International Conference on Networks Orlando, FL, , pp.113-116 [Details]
C. Hava and L. Murphy; (2000) Performance Measurement of World Wide Web Servers Proceedings of the 16th IEE UK Teletraffic Symposium Harlow, England, , pp.31/1-32/6 [Details]
S. Goor and L. Murphy; (2003) An Adaptive MPEG-4 Streaming System based on Object Prioritisation Proc. Irish Signals and Systems Conference 2003 Limerick, Ireland, [Details]
L. Murphy and F. F. Wu; (1993) Distributed Constrained Optimization Proceedings of the Sixth SIAM Conference on Parallel Processing for Scientific Computing Norfolk, VA, , pp.619-622 [Details]
J. Murphy, L. Murphy and E. C. Posner; (1994) Distributed Pricing for Embedded ATM Networks Proceedings of International Teletraffic Congress ITC-14 Antibes, France, , pp.1053-1063 [Details]
L. Murphy, J. Contreras and F. F. Wu; (1995) A Decomposition-Coordination Approach for Large-Scale Optimization Proceedings of the Seventh SIAM Conference on Parallel Processing for Scientific Computing San Francisco, CA, , pp.78-83 [Details]
L. Murphy and J. Murphy; (1995) Pricing For ATM Network Efficiency Proceedings of the Third International Conference on Telecommunication Systems Modelling and Analysis Nashville, TN, , pp.349-356 [Details]
G. Cunningham, S. Murphy, L. Murphy and P. Perry; (2005) Seamless Handover of Streamed Video over UDP between Wireless LANs Proc. IEEE Consumer Communications and Networking Conference (CCNC'05) Las Vegas, Nevada, [Details]
O. Ashagi, A. Ruzzelli, S. Murphy, L. Murphy and J. Murphy; (2005) Performance Modelling of a Distributed Approach to Interference Mitigation in License-Exempt IEEE 802.16 Systems Proc. IEEE Symposium on New Frontiers in Dynamic Spectrum Access Networks (DYSPAN 2005) Baltimore, Maryland, USA, [Details]
H. Melvin and L. Murphy; (2005) Exploring the Extent and Impact of Playout Adjustments within VoIP Applications on MOS Scores Proc. Measurement of Speech and Audio Quality in Networks (MESAQIN 2005) Prague, Czech Republic, , 09-JUN-05 - 10-JUN-05 [Details]
G. Muntean and L. Murphy; (2005) Solution Design for Efficient Distribution of Multimedia-based Services to Home Residences Proc. SWDC-REK International Conference on Software Development University of Iceland, , 27-MAY-05 - 01-JUN-05 [Details]
D. McGuinness and L. Murphy; (2005) A simulation model of a multi-server EJB system Proc. ICSE 2005 Workshop on Advances in Model-Based Software Testing (A-MOST) St. Louis, Missouri, USA, , 15-MAY-05 - 16-MAY-05 [Details]
D. McGuinness, L. Murphy and A. Lee; (2004) Issues in Developing a Simulation Model of an EJB Application Server Computer Measurement Group 2004 International Conference (CMG 2004) Las Vegas, Nevada, , 05-DEC-04 - 10-DEC-04 [Details]
G. Cunningham, P. Perry and L. Murphy; (2004) Application Layer Delay-Centric Handover of Streamed Video in a 4G Network Proc. ITT 2004 Limerick, Ireland, , 20-OCT-04 - 21-OCT-04 [Details]
G. Cunningham, P. Perry and L. Murphy; (2004) Soft, Vertical Handover of Streamed Video Proc. 5th IEE International Conference on 3G Mobile Communication Technologies (3G 2004) London, England, , 18-OCT-04 - 20-OCT-04 [Details]
N. Cranley, P. Perry and L. Murphy; (2004) Perceptual Quality Adaptation (PQA) Algorithm for 3GP and Multi-Tracked MPEG-4 Content over Wireless IP Networks Proc. 15th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2004) Barcelona, Spain, , 05-SEP-04 - 08-SEP-04 [Details]
G. Muntean, P. Perry and L. Murphy; (2004) Quality-Oriented Adaptation Scheme (QOAS) for High Bit-rate Multimedia Streaming Proc. 6th International Conference on Technical Informatics (CONTI 2004) Timisoara, Romania, , 27-MAY-04 - 28-MAY-04 , pp.199-204 [Details]
H. Melvin and L. Murphy; (2004) An Evaluation of Delay-Aware Receiver Playout Strategies for VoIP Applications Proc. Third IFIP-TC6 Networking Conference, Athens, Greece, May 9-14, 2004; and in Lecture Notes in Computer Science, vol. 3042/2004, Springer-Verlag, p. 320-331 Athens, Greece, , 09-MAY-04 - 14-MAY-04 [Details]
M. Narbutt and L. Murphy; (2004) A New VoIP Adaptive Playout Algorithm Proc. IEE Telecommunications Quality of Service: The Business of Success (QoS 2004) London, UK, , 02-MAR-04 - 03-MAR-04 [Details]
M. Narbutt and L. Murphy; (2003) VoIP Playout Buffer Adjustment using Adaptive Estimation of Network Delays Proc. International Teletraffic Congress ITC-18 Berlin, Germany, , 31-AUG-03 - 05-SEP-03 [Details]
M. Searles, P. Perry and L. Murphy; (2003) Probe based Dynamic Server Selection for Multimedia QoS Proc. HET-NETs '03: First International Working Conference on Performance Modelling and Evaluation of Heterogeneous Networks Ilkley, England, , 21-JUL-03 - 23-JUL-03 [Details]
H. Melvin and L. Murphy; (2003) An Integrated NTP-RTCP Solution to Audio Skew Detection and Compensation for VoIP Applications Proc. IEEE ICME 2003: International Conference on Multimedia and Expo Baltimore, Maryland, , 06-JUL-03 - 09-JUL-03 [Details]
H. Melvin and L. Murphy; (2003) An Evaluation of the Potential of Synchronised Time to improve VoIP Quality Proc. IEEE ICC 2003: International Conference on Communications Anchorage, Alaska, , 11-MAY-03 - 15-MAY-03 [Details]
S. Goor and L. Murphy; (2003) A Priority Based Adaptive MPEG-4 Streaming System Using Pre-encoded Video Objects Proc. Second Joint IEI/IEEE Symposium on Telecommunications Systems Research Dublin, Ireland, , 06-MAY-03 - 06-MAY-03 [Details]
M. Searles and L. Murphy; (2003) Selecting Among Replicated Rate-Adaptive Multimedia Servers: A Probe Based Approach Proc. Second Joint IEI/IEEE Symposium on Telecommunications Systems Research Dublin, Ireland, , 06-MAY-03 - 06-MAY-03 [Details]
G. Cunningham and L. Murphy; (2003) Adaptive MPEG-4 transmission at the Wireless Transmitter Proc. Second Joint IEI/IEEE Symposium on Telecommunications Systems Research Dublin, Ireland, , 06-MAY-03 - 06-MAY-03 [Details]
G. Muntean and L. Murphy; (2002) Adaptive Pre-recorded Multimedia Streaming Proc. IEEE Globecom 2002 Taipei, Taiwan, , 17-NOV-02 - 21-NOV-02 [Details]
N. Dumitrascu and L. Murphy; (2002) A Framework for Optimal Deployment Schema in Component-based Systems Proc. IEEE SOFTCOM 2002: 10th Conference on Software, Telecommunications and Computer Networks , 08-OCT-02 - 11-OCT-02 [Details]
M. Searles, N. Cranley and L. Murphy; (2002) Adaptive Multicast Architecture for Streamed MPEG-4 over IP Networks Proc. Irish Signals and Systems Conference 2002 Cork, Ireland, , 25-JUN-02 - 26-JUN-02 [Details]
G. Muntean and L. Murphy; (2002) Adaptive Traffic-based Techniques for Live Multimedia Streaming Proc. ICT 2002: International Conference on Telecommunications Beijing, China, , 23-JUN-02 - 26-JUN-02 [Details]
G. Muntean and L. Murphy; (2002) A Novel Traffic-Based Adaptive Technique for Feedback-Controlled Transmissions of Pre-recorded Multimedia Streams Proceedings of WWW2002: The 11th International World Wide Web Conference Honolulu, Hawaii, , 07-MAY-02 - 11-MAY-02 [Details]
C. Hava, J. McManis, J. Murphy and L. Murphy; (2002) A Clients Perception Based Adaptive Web Server Application Proceedings of WWW2002: The 11th International World Wide Web Conference Honolulu, Hawaii, , 07-MAY-02 - 11-MAY-02 [Details]
H. Melvin and L. Murphy; (2001) An Investigation into the use of Synchronised Time to Improve VoIP Service Proceedings of the First Joint IEI/IEE Symposium on Telecommunications Systems Research Dublin, Ireland, , 27-NOV-01 - 27-NOV-01 [Details]
M. Narbutt and L. Murphy; (2001) Adaptive Anti-jitter Mechanism for Multi-Party Conferencing in a H.323 Multi-Point Control Unit Proceedings of the First Joint IEI/IEE Symposium on Telecommunications Systems Research Dublin, Ireland, , 27-NOV-01 - 27-NOV-01 [Details]
M. Narbutt and L. Murphy; (2001) Adaptive Playout Buffering for H.323 Voice over IP applications Proceedings of Irish Signals and Systems Conference 2001 Maynooth, Ireland, , 25-JUN-01 - 27-JUN-01 , pp.201-206 [Details]
N. Cranley and L. Murphy; (2001) Adaptive Quality of Service for Streamed MPEG-4 over the Internet Proceedings of IEEE ICC2001: International Conference on Communications Helsinki, Finland, , 11-JUN-01 - 15-JUN-01 , pp.1206-1210 [Details]
G. Muntean and L. Murphy; (2001) A Novel Feedback Controlled Multimedia Transmission Scheme Proceedings of ICT 2001: International Conference on Telecommunications Bucharest, Romania, , 04-JUN-01 - 07-JUN-01 , pp.123-128 [Details]
C. Hava, J. McManis, J. Murphy and L. Murphy; (2001) A New Dynamic Web Server Proceedings of ICT 2001: International Conference on Telecommunications Bucharest, Romania, , 04-JUN-01 - 07-JUN-01 [Details]
C. Hava, J. McManis, J. Murphy and L. Murphy; (2001) A Client-Orientated Dynamic Web Server Proceedings of the 17th IEE UK Teletraffic Symposium Dublin, Ireland, , 16-MAY-01 - 18-MAY-01 , pp.14/1-14/6 [Details]
G. Muntean and L. Murphy; (2000) Some Software Issues of a Real-Time Multimedia Networking System Proceedings of CONTI 2000 Timisoara, Romania, , 12-OCT-00 - 13-OCT-00 , pp.35-40 [Details]
C. Hava, S. Holban, J. Murphy and L. Murphy; (2000) Initial Tool for Monitoring Performance of Web Sites Proceedings of CONTI 2000 Timisoara, Romania, , 12-OCT-00 - 13-OCT-00 , pp.123-128 [Details]
G. Muntean and L. Murphy; (2000) An Object-Oriented Prototype System for Feedback Controlled Multimedia Networking Proceedings of the Irish Signals and Systems Conference 2000 Dublin, Ireland, , 29-JUN-00 - 30-JUN-00 , pp.173-180 [Details]
N. Cranley, L. Fiard and L. Murphy; (2000) Quality of Service for Streamed Multimedia over the Internet Proceedings of the Irish Signals and Systems Conference 2000 Dublin, Ireland, , 29-JUN-00 - 30-JUN-00 , pp.181-188 [Details]
P. Bindal and L. Murphy; (1997) Multimedia Feedback Control in ATM Local Area Networks Proceedings of the 35th ACM Southeast Conference Murfreesboro, TN, , 02-APR-97 - 04-APR-97 [Details]
M. Birkner and L. Murphy; (1997) ImpRes: Supporting Services in IPv6 using the Flow Label and Hop-by-Hop Option Fields Proceedings of the 35th ACM Southeast Conference Murfreesboro, TN, , 02-APR-97 - 04-APR-97 , pp.235-242 [Details]
Y. Chang, K. Chang, L. Murphy, T. Dollar, B. Lee and J. Fouss; (1997) Hypertext Document Generator in a Computer Supported Cooperative Work Environment Proceedings of the 35th ACM Southeast Conference Murfreesboro, TN, , 02-APR-97 - 04-APR-97 , pp.205-207 [Details]
J. Fouss, K. Chang, L. Murphy, T. Dollar, B. Lee and Y. Chang; (1997) Computer-Aided Software Engineering in a Computer Supported Cooperative Environment Proceedings of the 35th ACM Southeast Conference Murfreesboro, TN, , 02-APR-97 - 04-APR-97 , pp.268-274 [Details]
L. Murphy, J. Murphy and J. MacKie-Mason; (1996) Feedback and Efficiency in ATM Networks Proceedings of IEEE ICC 96 Dallas, TX, , 24-JUN-96 - 27-JUN-96 , pp.1045-1049 [Details]
J. Lewis and L. Murphy; (1996) Dynamic Synchronization of Multimedia Traffic in ATM Networks Proceedings of 34th Annual ACM Southeast Conference Tuskegee, AL, , 18-APR-96 - 19-APR-96 , pp.57-61 [Details]
                                       

Presentation

H. Melvin, P. Corcoran, L. Murphy; (2007) Time and Timing Issues within the Wireless Application Home Environment. Presentation [Details]
H. Melvin, L. Murphy; (2006) Synchronisation and Skew Issues within IP-based Multimedia Terminals. Presentation [Details]
J. Murphy, M. Doorley and L. Murphy; (2006) Prediction of Performance Bottlenecks in Scaling Java Enterprise Systems. Presentation [Details]
T. Parsons, J. Murphy and L. Murphy; (2006) Performance Monitoring of Enterprise Java Systems. Presentation [Details]
L. Murphy; (2006) Higher Returns on IPTV and Video-on-Demand Networks. Presentation [Details]
J. Murphy, A. Lee and L. Murphy; (2005) Peeling the Layers of the 'Performance Onion'. Presentation [Details]
L. Murphy; (2004) Mobile/Wireless Multimedia. Presentation [Details]
A. Oufimtsev and L. Murphy; (2004) Predicting Performance of EJB-based Systems Using Layered Queuing Networks. Presentation [Details]
A. Lee, J. Murphy and L. Murphy; (2003) The Performance of Component-based Software Systems. Presentation [Details]
H. Melvin and L. Murphy; (2003) Internet Telephony: Performance gains through use of Synchronized Time. Presentation [Details]
J. Murphy and L. Murphy; (2003) Performance Engineering Middleware Systems. Presentation [Details]
H. Melvin and L. Murphy; (2003) Internet telephony: Benefits and Issues relating to the use of synchronised time. Presentation [Details]
M. Narbutt and L. Murphy; (2000) Testing the Quality of Service of H.323 network applications. Presentation [Details]
J. MacKie-Mason, L. Murphy and J. Murphy; (1995) The Role of Feedback in Network Allocation. Presentation [Details]
                                 

Policy Contribution

S. Murphy, O. Ashagi, A. Ruzzelli, L. Murphy and J. Murphy; (2005) Performance Analysis of a Distributed Approach to Interference Mitigation in LE 802.16 Systems. Policy Contribution [Details]
           

Research

Research Interests

Performance Issues in Computer and Telecommunications Networks; Multimedia Networking; Performance issues in component-oriented software systems.