Publications
2011
Journal papers:
Ben M Parker, Steven G Gilmour, John A Schormans: “Design of Experiments for Categorical Repeated Measurements in Packet Communication Networks”, to appear in Technometrics, Nov 2011
2010
Conference papers:
Rehana Kausar,Yue Chen,KokKeong Chai, Laurie Cuthbert, JohnSchormans: “QoS Aware Mixed Traffic Packet Scheduling in OFDMA-based LTE-Advanced Networks”, The Fourth International Conference on Mobile Ubiquitous Computing, Systems, Services and Technologies,UBICOMM 2010, October 25 - 30, 2010 - Florence, Italy (
selected as a "Best Paper" based on the reviews of the original submission, the camera-ready version, and the presentation during the conference)
2009
Journal papers
- Sharifah H.S. Ariffin and John A. Schormans: “Application of the Generalised Ballot Theorem for Evaluation of Performance in Packet Buffers with non-FIFO Scheduling”, IET Communications Special Edition on Simulation, Analysis and Measurement of Broadband Network Traffic, June 2009 Volume 3, Issue 6
- Mondragon, R.; Moore, A.; Pitts, J.; Schormans, J.: “Analysis, Simulation and Measurement in Large-scale Packet Networks”, invited review paper, IET Communications Special Edition on Simulation, Analysis and Measurement of Broadband Network Traffic, June 2009 Volume 3, Issue 6, , Page(s): 887-905, Digital Object Identifier 10.1049/iet-com.2008.0111
- Parker, B.M.; Gilmour, S.G.; Schormans, J.: “Measurement of packet loss probability by optimal design of packet probing experiments”, IET Communications Special Edition on Simulation, Analysis and Measurement of Broadband Network Traffic, Page(s): 979-991. Digital Object Identifier 10.1049/iet-com.2008.0075
- Amaradasa V, Schormans J, Pitts J, Leung CM, “Evaluating overflow probability for voice over internet protocol buffer dimensioning”, IET COMMUN 3(4) Apr 2009
Conference papers
- Robert Stewart, John Allen, and John Schormans: "Performance Monitoring and Evaluation of a Motorola Wireless Mesh Outdoor Campus Network". Session 8 Complex Networks at 2009 Networking and Electronic Commerce Research Conference (NAEC 2009), October 8-11, 2009 in Riva Del Garda, Italy
2008
Journal papers
- Schormans, J.A. and Lu, S.:“A Time-stepped Approach for Accelerated Simulation of Mobile Ad Hoc Networks”. IET Communications, 2008, Vol.2, No.5, pp609-620.
- Stewart, R. Li Xiaoguang, Schormans, J.A and Hasib, M.: “A Cross layer Analysis for Voice over WiFi communications in Multihop Wireless Networks”. Accepted - International journal of mobile networks.
Conference papers
- Song, G., Cuthbert, L. and Schormans, J.: "Queueing Network Topology for Modelling Cellular/Wireless LAN Interworking Systems". Accepted at HET-NETs 2008.
- Song, G., Cuthbert, L. and Schormans, J.: "Open Networks of Loss Systems in the Modelling of Two-Tier Heterogeneous Hierarchical Overlay Wireless Networks", accepted for ChinaCom2008-WCN in the ChinaCom proceedings.
- Song, G., Cuthbert, L. and Schormans, J.: "Modelling Cellular/Wireless LAN Integrated Systems with Multi-Rate Traffic Using Queueing Network". WiCOM 2008.
- Pitts, J.M.; Schormans, J.A.; “An analytical study of precedence and QOE for voice service in degraded IP networks”, Military Communications Conference, 2008. MILCOM 2008. IEEE, 16-19 Nov. 2008 Page(s):1–7, Digital Object Identifier 10.1109/MILCOM.2008.4753406
2007
Journal papers
- Maheen H as ib, John Schormans and Tijana Timotijevic: 'Accuracy of Packet Loss Monitoring over Networked CPE', IET Communications Volume 1, Issue 3, p. 507-513 June 2007.
Conference papers
- Pitts, Jonathan M.; Yang, Qiang; Schormans, John A.: ”Using AF-PHB BOUDICCA Configuration for Reliable Real-Time Precedence-Based SLAs in Degraded IP Networks”. Military Communications Conference, 2007.
2006
Journal papers
- J.M. Pitts, X. Wang, Q. Yang and J.A. Schormans: 'Excess-rate queueing theory for M/M/1/RED with application to VoIP QoS', Electronics Letters, 28th Volume 42, Issue 20, pp 1188- 1189. ISSN: 0013-5194 September 2006.
Conference papers
•Amaradasa, V. and Schormans, J.A.: 'Accelerated Simulation of a GPS Scheduler Using Traffic Aggregation' HETNETs '06 - 4th International Working Conference, Performance Modelling and evaluation of heterogeneous networks, Ilkley, West Yorkshire, U.K - Sept 2006.
•Shaowen LU and John Schormans : 'SSIM: A Multi-Resolution Fluid Traffic Simulator for MANETs' The Third International Conference on Mobile Computing and Ubiquitous Networking (ICMU2006)
•J.M.Pitts and John A Schormans: "Configuring IP QoS mechanisms for graceful degradation of real-time services". MILCOM 2006.
•Raza, A.; Schormans, J. A.; Chen, X.;"Advanced Receiver Algorithms for Multi-Layered Space-Time Block Codes" presented at Ultra Wideband Systems, Technologies and Applications, 2006. The Institution of Engineering and Technology Seminar on Apr. 2006 Page(s):181 - 185.
•126. R. Stewart, Li Xiaoguang, J.A. Schormans and M. Hasib: "A Cross layer Analysis for Voice over WiFi communications in Multihop Wireless Networks". International journal of mobile networks.
2005
Journal papers
Chi Ming Leung and J A Schormans: 'Me as urement-b as ed End to End Latency Performance Prediction for SLA Verification'. The Journal of Systems and Software, 74 (2005) 243-254.
Schormans, J.A.: " Ubiquitous packet networking and data compression". Electronics Letters, Vol.41, No.9, April 2005, pp 523-525.
Ma, A.H.I. and Schormans, J.A 'Fast, stable simulation of power-law packet traffic using concatenated acceleration techniques'. IEE Proceedings Communications, Vol.152, No.4, August 2005, pp420-426.
Conference papers
Amaradasa, V. and Schormans, J.A.: 'Future Simulation Acceleration of Packet Networks Using GPS Scheduling' PGNET '05 - 6th Annual PostGraduate Symposium on the Convergence of Telecommunications, Networking & Broadcasting, Liverpool, UK - 2005.
2004
Journal papers
J.A. Schormans and C.M. Leung: "Measurement for guaranteeing QoS in broadband multiservice networks". Invited chapter (8) in " Mobile and wireless systems beyond 3G: managing new business opportunities" , ISBN 159140544-0. Prof Pagani editor.
Timotijevic, T., Leung, C.M. and Schormans, J.A.: "Accuracy of measurement techniques supporting QoS in packet b as ed Intranet and Extranet VPNs". IEE Proceedings Communications Special Edition on VPNs and Broadband Technology Vol. 151, No.1, Feb. 2004.
A. Raza, J.A. Schormans and X. Chen: "KIL-BLAST: diversity and multiplexing trade-off for layered space-time architectures with channel estimation error" Electronics Letters , vol. 40, no. 12, 10 th June, 2004, pp747-749.
M. H as ib, J.A. Schormans and J.M. Pitts: "Probing limitations for packet loss probability me as urement on buffered access links". Electronics Letters , vol. 40, no. 20, 30 th September, 2004, pp 1315-1316.
Conference papers
Schormans, J.A. and Pitts, J.M.: "SO YOU THINK YOU CAN MEASURE IP QOS?" Presented at the 2 nd IEE conference on QoS in IP networks, Savoy Place , 2-3 March 2004.
Sharifah H.S. Ariffin and John A. Schormans: " A Buffer with Two Priority Inputs". Presented at the 2004 IEEE International Conference on Communications (ICC, Paris , June 2004).
2003
Journal papers
Leung, C.M., Schormans, J.A., Pitts, J.M. and Woolf, M.: "Accurate decay rate prediction for burst-scale queueing in packet buffers". Electronics Letters, Vol.39, No.2, 23 rd January, 2003, pp253-254.
Ma, A.H.I., Schormans, J.A and Cuthbert, L.G.: "Aggregation Technique for Networks with Power Law Traffic and Application to Accelerated Simulation". IEE Proceedings - Communications - Volume 150, Issue 03. June 2003, p177.
Timotijevic, T. and Schormans, J.A.: "Bandwidth overhead of probe technology guaranteeing QoS in packet networks". IEE Electronics Letters , 15 th May, 2003, Vol. 39, No. 10, pp 816-818.
Schormans, J.A., Liu, E., Stewart, R.A. and Cuthbert, L.G.: "Analytical technique for accelerating the simulation of packet networks". IEE Proceedings Communications, Vol.150, No.5, October 2003, pp341-346. I EE Proceedings Communications , Vol.152, No.4, August 2005, pp420-426.
Conference papers
Shaowen Lu and J.A Schormans: " Simulation Acceleration Techniques for Mobile Ad-Hoc Networks ". London Communications Symposium, University College London , 2003.
M. H as ib and J.A. Schormans: "Limitations of P as sive and Active Me as urement in Packet Networks" London Communications Symposium, University College London , 2003.
Sharifah H. S. Ariffin and John A. Schormans: "Accelerated simulation method for power-law traffic and non-FIFO scheduling". London Communications Symposium, University College London , 2003.
John A. Schormans, Tijana T imotijevic: "Evaluating the Accuracy of Active Me as urement of Delay and Loss in Packet Networks". 6th IFIP/IEEE International Conference on Management of Multimedia Networks and Services, September 2003 , Queens University , Belf as t .
Tijana T imotijevic and John A. Schormans: "Bandwidth overhead of me as urement technology used for guaranteeing QoS in packet networks". International Network Optimization Conference (INOC), Paris , France , October 2003.
2002
A.S. Al-Hammadi & J.A. Schormans, A neuro-fuzzy congestion controller in a prioritised ATM switch, First International ICSC Conference on Neuro-Fuzzy Technologies, university of Havana, Cuba, January 2002
A.H.I. Ma & J.A. Schormans, A hybrid technique for the analysis of multiplexed power-law traffic in broadband networks, Electronics Letters, 38(6), pp 295-297, March 2002
A.H.I. Ma & J.A. Schormans, Efficient simulation modelling for long range dependent traffic, RESIM 02, 2002: 4th Workshop on "Rare Event Simulation and related Combinatorial Optimization Problems" (RESIM / COP02), , April 2002
A. Raza, J.A. Schormans & X. Chen, Space-time block coded OFDM without guard intervals. , International Conference on Telecommunications (ITC2002), Beijing, June 2002
A.S. Al-Hammadi & J.A. Schormans, Neural network techniques in ATM congestion control, MESM02, American University Sharjah, Sharjah, UAE, September 2002
C.M. Leung & J.A Schormans, Measurement-based traffic characteristic estimation for QoS oriented IP networks, 41st European Telecommunications Congress, Genoa, September 2002
2001
J.M. Pitts, J.A. Schormans, C.I. Phillips & J.M. Griffiths, Accurate delay bounds for real-time IP services in presence of variable packet size, Electronics Letters, 37(3), pp
A.S.Al-Hammadi & J.A.Schormans, A fuzzy congestion controller in a prioritised ATM switch, IEE Proceedings - Communications, April 2001
J.M. Pitts, J.A. Schormans, E.M. Scharf & A.J. Pearmain, Tight bounds for the tail of the packet waiting time distribution in buffered networks, International Journal of Communications Systems, 14, pp 715-723, June 2001
J.A. Schormans & J.M. Pitts, From Erlangs to excess rate, Journal of the IBTE, December 2001
E. Liu, J. Schormans, L. Cuthbert, C.Phillips & G. Stoneley, Application of neural networks to accelerated simulation of Internet type WANs, 17th International Telecommunications Congress, Brazil, , December 2001
2000
H.O. Awadalla, L.G. Cuthbert & J.A. Schormans, Novel resource allocation strategy for ATM satellite systems, Electronics Letters, Vol. 36, no.3, pp 281-282, February 2000
T. Timotijevic. & J.A. Schormans, ATM Level Performance Analysis on a DS-CDMA Satellite Link using DTX, IEE Proceedings - Communications, Vol. 147, no. 1, pp 47-56,
J.A. Schormans, J.M. Pitts, E.M. Scharf, A.J. Pearmain & C.I. Phillips, Buffer Overflow Probability for Multiplexed On-Off VoIP Sources, Electronics Letters, Vol. 36, no. 6, pp 523-524, March 2000
E. Liu, L.G. Cuthbert & J.A. Schormans, Fast and Adaptive Simulation Method for IP Networks, 8th International Conference on Telecommunication Systems, Nashville, USA, March 2000
R. Stewart & J.A. Schormans, Accelerated Simulation of a Reservation-Capabel Network with Optimised Refreshing of Soft State, 8th International Conference on Telecommunication Systems, Modeling and Analysis, March 2000
R. Stewart & J.A. Schormans, Integration of Resource Reservation Capable IP Networks and Broadband Satellite Constellations., PREP 2000, University of Nottingham, April 2000
J.A. Schormans, J.M. Pitts, A.H.I. Ma & R.J. Mondragon, Accurate results for traffic engjneering in the presence of LRD, 16th IEE UK Teletraffic Symposium, May 2000
R. Stewart & J.A. Schormans, A Simulation study of a Differentiated Services Network, 16th IEE UK Teletraffic Symposium, May 2000
E. Liu, J.A. Schormans, L.G. Cuthbert, G. Stoneley & C.I. Phillips, A novel accelerated simulation technique for WANs, 16th IEE UK Teletraffic Symposium on Management of Quality Services, UK, May 2000
J.A. Schormans & J.M. Pitts, Overflow probability in shared cell switched buffers, IEEE Communications Letters, Vol. 4, no. 5, pp 167-169, May 2000
E. Liu, J.A. Schormans, L.G. Cuthbert. & G. Stoneley, A novel fast simulation method for ATM networks, IEEE Conference on High Performance Switching and Routing, Germany, pp 387-393, June 2000
J.A. Schormans, J.M. Pitts, R.J. Mondragon, E.M. Scharf, A.J. Pearmain & C.I. Phillips, Design rules for buffering overlapping Pareto processes in packetised networks, Electronics Letters, Vol. 36, no.12, pp 1086-1088, June 2000
E. Liu, L.G. Cuthbert, J.A. Schormans & G. Stoneley, Neural Network in fast simulation modeling, IEEE-INNS-ENNS International Joint Conference on Neural Networks, Italy, Vol. 6, pp 109-113, July 2000
A.H.I. Ma, J.A. Schormans, J.M. Pitts & A.J. Pearmain, Design rules and equivalent capacity for a Pareto source, Electronics Letters, Vol. 36, no. 15, pp 1274-1275, July
E. Liu, J.A. Schormans, L.G. Cuthbert, C.I. Phillips & G. Stoneley, Fast hybrid simulation with neural network prediction, World Multiconference on Systemics, Cybernetics and Informatics, Vol 7, Computer Science and Engineering Part 1, pp 254-258, July 2000
J.A. Schormans, J.M. Pitts, E.M. Scharf, Pearmain, A. & C.I. Phillips, Analysis and design rules for multiplexing models: SRD traffic and LRD traffic, Eighth IFIP Workshop on Performance Modelling and Evaluation of ATM and IP, University of Bradford, July 2000
A. Al-Hammadi & J.A. Schormans, Access flow control scheme for ATM networks using adaptive linear prediction, Electronics Letters, Vol. 36, no 17, pp 1509-1510,
R. Stewart, J.A. Schormans, J.M. Pitts, A.J. Pearmain & C.I. Phillips, Analysis of local internet/enterprise networking multiplexer for on-off VoIP sources, Electronics Letters, Vol. 36, no. 21, pp 1825-1826, October 2000
J.M. Pitts & J.A. Schormans, Introduction to IP and ATM design and performance, John Wiley and Sons, December 2000