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

1. 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  
2. 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
3. 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
4. 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

1. 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

1. 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.
2. 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

1. Song, G., Cuthbert, L. and Schormans, J.: "Queueing Network Topology for Modelling Cellular/Wireless LAN Interworking Systems". Accepted at HET-NETs 2008.
2. 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.
3. Song, G., Cuthbert, L. and Schormans, J.: "Modelling Cellular/Wireless LAN Integrated Systems with Multi-Rate Traffic Using Queueing Network". WiCOM 2008.
4. 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

1. 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

1. 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

1. 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