Dr John Schormans
Senior Lecturer
School of Electronic Engineering and Computer Science
Queen Mary University of London
Queen Mary University of London
Research
packet networks, probabilistic performance analysis and evaluation of packet networks
Interests
My main focus is on analysis, simulation and measurement of packet-based networks, in wired and wireless scenarios. This includes evaluating QoE as well as more traditional network performance metrics.Publications
Publications of specific relevance to the Centre for Networks, Communications and Systems2023
Ahmad N, Wahab A, Schormans J and Arnab AA (2023). Significance of Cross-Correlated QoS Configurations for Validating the Subjective and Objective QoE of Cloud Gaming Applications. Future Internet, MDPI vol. 15 (2) 02-02-2023
2022
Ahmad N, Wahab A, Schormans J and Arnab AA (2022). Comparative QoE Study of VoD and Passive Gaming Videos using Cross-Correlated QoS Metrics. Proceedings of the 20th ACM International Symposium on Mobility Management and Wireless Access. 24-10-2022
Ahmad N, Wahab A, Schormans J and Arnab AA (2022). A Novel Objective Video Quality Assessment Metric For Cloud Gaming Applications. 2022 International Conference on Communications, Computing, Cybersecurity, and Informatics (CCCI). 19-10-2022
2021
Wahab A, Ahmad N, Martini MG and Schormans J (2021). Subjective Quality Assessment for Cloud Gaming. J — Multidisciplinary Scientific Journal, MDPI vol. 4 (3), 404-419. 05-08-2021
Arnab AA, Raj SMRH, Schormans J, Mukta SJ and Ahmad N (2021). Analysis of the Cost of Varying Levels of User Perceived Quality for Internet Access. Intelligent Computing and Optimization 393-405. 01-01-2021
2020
Wahab A, Ahmad N and Schormans J (2020). Direct propagation of network QoS distribution to subjective QoE for Video on Demand applications using VP9 codec. 2020 International Wireless Communications and Mobile Computing (IWCMC). 15-06-2020
Wahab A, Ahmad N and Schormans J (2020). Variation in QoE of passive gaming video streaming for different Packet Loss Ratios. 2020 Twelfth International Conference on Quality of Multimedia Experience (QoMEX). 26-05-2020
Wahab A, Ahmad N and Schormans J (2020). Statistical error propagation affecting the quality of experience evaluation in video on demand applications. Applied Sciences (Switzerland), MDPI AG vol. 10 (10) 25-05-2020
Guo T, Schormans J, Lexi X, Jinze W and Cao Y (2020). Proximity as a Service for the Use Case of Access Enhancement via Cellular Network-Assisted Mobile Device-to-Device test. IEEE Access, Institute of Electrical and Electronics Engineers (IEEE) vol. 4, C2-2. 10-02-2020
Schormans J, Guo TIANHAO, XU L, WU J and CAO Y (2020). Proximity as a Service for the Use Case of Access Enhancement via Cellular Network-Assisted MobileDevice-to-Device. IEEE Access, Institute of Electrical and Electronics Engineers (IEEE) 10-02-2020
Schormans J, Wahab A and Ahmad N (2020). Paper title: Direct propagation of network QoS distribution to subjective QoE for Video on Demand applications using VP9 codec. IWCMC 2020. 01-01-2020
Schormans J, Wahab A and Ahmad N (2020). Variation in QoE of Passive Gaming Video Streaming for Different Packet Loss Ratios. QoMEX 2020. 01-01-2020
Schormans J, Ahmad N and Wahab A (2020). Importance of Cross-Correlation of QoS metrics in Network Emulators to Evaluate QoE of Video Streaming Applications. 11th International Conference on Network of the Future (NoF 2020). 01-01-2020
2018
Dai Y, Wijeratne V, Chen Y and Schormans J (2018). User experience aware active queue management in cellular networks. Journal of Communications, Engineering and Technology Publishing vol. 13 (10), 588-593. 01-10-2018
Roshan M, Schormans JA and Ogilvie R (2018). Video-on-demand QoE Evaluation Across Different Age- Groups and Its Significance for Network Capacity. ICST Transactions on Mobile Communications and Applications, European Alliance for Innovation n.o. vol. 3 (9) 10-01-2018
2017
Guo T, Huang G, Schormans J, Wang T and Cao Y (2017). CAP: A ContAct based Proximity service via opportunistic device-to-device relay. ISWCS 2017. 14-11-2017
SCHORMANS JA (2017). Channel Quality Aware Active Queue Management. Computer Science and Electronic Engineering (CEEC), 2017. 27-09-2017
Smith EA and Schormans JA (2017). Holistic assessment of call centre performance. IET Networks 18-07-2017
Song L, Chai KK, Chen Y, Schormans J, Loo J and Vinel A (2017). QoS-Aware Energy-Efficient Cooperative Scheme for Cluster-Based IoT Systems. IEEE Systems Journal vol. 11 (3), 1447-1455. 23-06-2017
Parker BM, Gilmour SG and Schormans J (2017). Optimal design of experiments on connected units with application to social networks. JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES C-APPLIED STATISTICS vol. 66 (3), 455-480. 28-02-2017
Wang Y, Chai KK, Chen Y, Schormans J and Loo J (2017). Energy-Aware Restricted Access Window Control with Retransmission Scheme for IEEE 802.11AH (Wi-Fi HaLow) Based Networks. 2017 13th Annual Conference on Wireless On-demand Network Systems and Services (WONS). 01-02-2017
2016
Song L, Chai KK, Chen Y, Loo J and Schormans J (2016). Cooperative Coalition Selection for Quality of Service Optimization in Cluster-Based Capillary Networks. IEEE Systems Journal, Institute of Electrical and Electronics Engineers (IEEE) vol. 12 (2), 1700-1708. 07-12-2016
Wang Y, Chai KK, Chen Y, Schormans J and Loo J (2016). Energy-Delay Aware Restricted Access Window with Novel Retransmission for IEEE 802.11ah Networks. 2016 IEEE Global Communications Conference (GLOBECOM). 01-12-2016
Han X and Schormans J (2016). Cross‐layer queueing analysis for aggregated ON–OFF arrivals with adaptive modulation and coding. IET Communications, Institution of Engineering and Technology (IET) vol. 10 (17), 2336-2343. 01-11-2016
Zhao J, Chai KK, Chen Y, Schormans J and Alonso-Zarate J (2016). Two-Level Game for Relay-Based Throughput Enhancement via D2D Communications in LTE Networks. 2016 IEEE International Conference on Communications (ICC). 01-05-2016
Song L, Chai KK, Chen Y, Loot J, Jimaa S and Schormans J (2016). QPSO-Based Energy-Aware Clustering Scheme in the Capillary Networks for Internet of Things Systems. 2016 IEEE Wireless Communications and Networking Conference. 01-04-2016
Song L, Chai KK, Chen Y and Schormans J (2016). Energy Efficiency Cooperative Scheme for Cluster-based Capillary Networks in Internet of Things Systems. 2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC). 01-01-2016
2015
Zhao J, Chai KK, Chen Y, Schormans J and Alonso‐Zarate J (2015). Joint mode selection and resource allocation for machine‐type D2D links. Transactions on Emerging Telecommunications Technologies, Wiley vol. 28 (2) 11-11-2015
SCHORMANS JA (2015). QoS-aware Energy Efficient Cooperative Scheme for Cluster-based IoT Systems. IEEE Systems Journal, Institute of Electrical and Electronics Engineers 11-11-2015
Wang Y, Li Y, Chai KK, Chen Y and Schormans J (2015). Energy-Aware Adaptive Restricted Access Window for IEEE 802.11AH Based Smart Grid Networks. 2015 IEEE International Conference on Smart Grid Communications (SmartGridComm). 01-11-2015
Wang Y, Li Y, Chai KK, Chen Y and Schormans J (2015). Energy-Aware Adaptive Restricted Access Window for IEEE 802.11ah Based Networks. 2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC). 01-08-2015
Xu L, Chen Y, Chai KK, Schormans J and Cuthbert L (2015). Self-organising cluster-based cooperative load balancing in OFDMA cellular networks. Wireless Communications and Mobile Computing vol. 15 (7), 1171-1187. 01-05-2015
Parker BM, Gilmour S, Schormans J and Maruri-Aguilar H (2015). Optimal design of measurements on queueing systems. QUEUEING SYSTEMS, Springer US vol. 79 (3-4), 365-390. 01-04-2015
Song L, Chai KK, Chen Y and Schormans J (2015). Energy efficient cooperative MISO scheme for cluster-based M2M capillary networks. 2014 International Symposium on Wireless Personal Multimedia Communications (WPMC). 19-01-2015
Parker BM, Schormans JA and Gilmour SG (2015). Increasing throughput in IEEE 802.11 by optimal selection of backoff parameters. IET Networks, Institution of Engineering and Technology (IET) vol. 4 (1), 21-29. 01-01-2015
Parker BM, Gilmour SG and Schormans J (2015). Utility based framework for optimal network measurement. IET Networks, Institution of Engineering and Technology (IET) vol. 4 (1), 10-20. 01-01-2015
Wahid AA and Schormans JA (2015). Bounds on Accuracy when Estimating the Loss Probability in a Packet Buffer. 2015 7th Computer Science and Electronic Engineering Conference (CEEC). 01-01-2015
Wang Y, Li Y, Chai KK, Chen Y and Schormans J (2015). Fnergy-aware Adaptive Restricted Access Window for IEEE 802.11ah Based Networks. 01-01-2015
Zhao J, Chai KK, Chen Y, Schormans J and Alonso-Zarate J (2015). Joint mode selection and radio resource allocation for D2D communications based on dynamic coalition formation game. 01-01-2015
2014
Xu L, Luan Y, Chao K, Cheng X, Zhang H and Schormans J (2014). Channel-Aware Optimised Traffic Shifting in LTE-Advanced Relay Networks. 2014 IEEE 25th Annual International Symposium on Personal, Indoor, and Mobile Radio Communication (PIMRC). 01-01-2014
2013
Wahid AA and Schormans J (2013). Bounding the Maximum Sampling Rate when Measuring PLP in a Packet Buffer. 2013 5th Computer Science and Electronic Engineering Conference (CEEC). 01-09-2013
Song G, Yang L, Wu J and Schormans J (2013). Performance comparisons between cellular-only and cellular/WLAN integrated systems based on analytical models. Frontiers of Computer Science vol. 7 (4), 486-495. 01-08-2013
Xu L, Chen Y, Chai KK, Schormans J and Cuthbert L (2013). Self‐organising cluster‐based cooperative load balancing in OFDMA cellular networks. Wireless Communications and Mobile Computing, Wiley vol. 15 (7), 1171-1187. 21-07-2013
Xu L, Chen Y, Chai KK, Liu D, Yang S and Schormans JA (2013). User Relay assisted Traffic Shifting in LTE-Advanced Systems., Editors: Fettweis G. 77th IEEE Vehicular Technology Conference (VTC2013-Spring) Dresden, Germany 2 Jun 2013 - 5 Jun 2013. 01-01-2013
Zhong B, Schormans J and Bodanese E (2013). Evaluating QoE in Cognitive Radio Networks for Improved Network and User Performance. IEEE COMMUNICATIONS LETTERS vol. 17 (12), 2376-2379. 01-01-2013
2012
Song G, Wu J, Schormans J and Cuthbert L (2012). Erlang's fixed-point approximation for performance analysis of HetNets. Journal of Applied Mathematics vol. 2012 20-06-2012
Song G, Wu J, Schormans J, Yang L and Cuthbert L (2012). A performance study of hierarchical heterogeneous wireless integrated networks. Applied Mathematics and Information Sciences vol. 6 (2 SUPPL.) 01-04-2012
Song G, Wu J, Schormans J, Yang L and Cuthbert L (2012). A Performance Study of Hierarchical Heterogeneous Wireless Integrated Networks. APPLIED MATHEMATICS & INFORMATION SCIENCES vol. 6 (2), 497S-504S. 01-01-2012
Lexi Xu , Yue Chen , Kok Keong Chai , Tiankui Zhang , Schormans J and Cuthbert L (2012). Cooperative load balancing for OFDMA cellular networks. European Wireless, 2012. EW. 18th European Wireless Conference. 01-01-2012
2011
SCHORMANS JA, Parker BM and Gilmour SG (2011). Design of Experiments for Categorical Repeated Measurements in Packet Communication Networks. Technometrics vol. 53 (4), 339-352. 01-01-2011
Xu L, Chen Y, Schormans J, Cuthbert L and Zhang T (2011). User-Vote Assisted Self-Organizing Load Balancing for OFDMA Cellular Systems. 01-01-2011
Wijeratne V and Schormans J (2011). Packet-delay invariance to scheduling under congestion. IET International Conference on Communication Technology and Application (ICCTA 2011). 01-01-2011
2010
Kausar R, Chen Y, Chai KK, Cuthbert L and Schormans J (2010). QoS aware mixed traffic packet scheduling in OFDMA-based LTE-advanced networks. 01-12-2010
2009
Lu S and Schromans JA (2009). Error analysis in accelerated session-level MANET simulations. Simulation Modelling Practice and Theory, Elsevier vol. 17 (7), 1171-1198. 01-08-2009
Parker BM, Gilmour SG and Schormans J (2009). Measurement of packet loss probability by optimal design of packet probing experiments. IET COMMUN vol. 3 (6), 979-991. 01-06-2009
Ariffin SHS, Schormans JA and Ma AHI (2009). Application of the generalised ballot theorem for evaluation of performance in packet buffers with non-first in first out scheduling. IET COMMUN vol. 3 (6), 933-944. 01-06-2009
Schormans J (2009). Simulation, Analysis and Measurement of Broadband Network Traffic. IET COMMUN vol. 3 (6), 883-886. 01-06-2009
Mondragon R, Moore A, Pitts J and Schormans J (2009). Analysis, simulation and measurement in large-scale packet networks. IET COMMUN vol. 3 (6), 887-905. 01-06-2009
Amaradasa V, Schormans J, Pitts J and Leung CM (2009). Evaluating overflow probability for voice over internet protocol buffer dimensioning. IET COMMUN vol. 3 (4), 636-643. 01-04-2009
SCHORMANS JA, Song and Cuthbert LG (2009). Queueing Network Topology for Modelling Cellular/Wireless LAN Interworking Systems. Performance Modelling and Analysis of Heterogeneous Networks, 1–17 , Editors: Kouvatsos D. 01-01-2009
2008
Lu S and Schormans JA (2008). Time-stepped approach for accelerated simulation of mobile ad hoc networks. IET COMMUN vol. 2 (5), 609-620. 01-05-2008
Pitts JM and Schormans JA (2008). AN ANALYTICAL STUDY OF PRECEDENCE AND QOE FOR VOICE SERVICE IN DEGRADED IP NETWORKS. 01-01-2008
Song GZ, Cuthbert L and Schormans J (2008). Modelling Cellular/Wireless LAN Integrated Systems with Multi-Rate Traffic Using Queueing Network. 01-01-2008
Song GZ, Cuthbert L and Schormans J (2008). Open Networks of Loss Systems in the Modelling of Tow-Tier Heterogeneous Hierarchical Overlay Wireless Networks. 01-01-2008
2007
PITTS JM, Schormans JA and Yang Q (2007). Whole System Modelling and What-If QoS Evaluation of Enterprise VoIP Networks. Networking and Electronic Commerce Research Conference 2007 (NAEC 2007), Italy, October 2007. 01-10-2007
Hasib M, Schormans J and Timotijevic T (2007). Accuracy of packet loss monitoring over networked CPE. IET COMMUN vol. 1 (3), 507-513. 01-06-2007
Stewart R, Xiaoguang L, Schormans JA and Hasib M (2007). A cross layer analysis for voice over WiFi communications in multihop wireless networks. International Journal of Mobile Network Design and Innovation, Inderscience Publishers vol. 2 (3/4) 01-01-2007
Pitts JM, Yang Q and Schormans JA (2007). Using AF-PHB BOUDICCA configuration for reliable real-time precedence-based SLAs in degraded IP networks. 01-01-2007
2006
Pitts JM, Wang X, Yang Q and Schormans JA (2006). Excess-rate queuing theory for M/M/1/RED with application to VolP QoS. ELECTRON LETT vol. 42 (20), 1188-1189. 28-09-2006
SCHORMANS JA and Amaradasa V (2006). 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, UK - September 2006. 01-09-2006
SCHORMANS JA, Chen X and Raza A (2006). Advanced Receiver Algorithms for Multi-Layered Space-Time Block Codes. Ultra Wideband Systems, Technologies and Applications, 2006. The Institution of Engineering and Technology Seminar on April 2006. 01-04-2006
SCHORMANS JA and Lu S (2006). SSIM: A Multi-Resolution Fluid Traffic Simulator for MANETs. The Third International Conference on Mobile Computing and Ubitquitous Networking (ICMU2006). 01-01-2006
Pitts JM and Schormans JA (2006). Configuring IP QoS mechanisms for graceful degradation of real-time services. 01-01-2006
2005
PITTS JM and Schormans JA (2005). Configuring Packet Transport of Emerging Real-Time Services for Graceful Degraduation Under Congestion. IEEE Bandwidth Management Workshop XI, October 2005. 01-10-2005
Hasib M, Schormans J and Pitts J (2005). Erratum: Probing limitations for packet loss probability measurement on buffered access links (Electronics Letters (2004) 40:20 (1315-1316)). Electronics Letters vol. 41 (17) 18-08-2005
Hasib M, Schormans J and Pitts J (2005). Probing limitations for packet loss probability measurement on buffered access links (vol 40, pg 1315, 2004). ELECTRON LETT vol. 41 (17), 987-987. 18-08-2005
Ma AHI and Schormans JA (2005). Fast, stable simulation of power-law packet traffic using concatenated acceleration techniques. IEE P-COMMUN vol. 152 (4), 420-426. 01-08-2005
Schormans J (2005). Ubiquitous packet networking and data compression. ELECTRON LETT vol. 41 (9), 523-525. 28-04-2005
Leung CM and Schormans JA (2005). Measurement-based end to end latency performance prediction for SLA verification. J SYST SOFTWARE vol. 74 (3), 243-254. 01-02-2005
SCHORMANS JA and Amaradasa V (2005). 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. 01-01-2005
2004
Hasib M, Schormans J and Pitts J (2004). Probing limitations for packet loss probability measurement on buffered access links. ELECTRON LETT vol. 40 (20), 1315-1316. 30-09-2004
Schormans JA, CHEN X and Raza A (2004). Layered Sapce-Time Block Codes with Interactive Decoding. London Communications Symposium 2004, London, UK - 13-14 September 2004. 13-09-2004
Raza A, Schormans JA and Chen X (2004). KIL-BLAST: diversity and multiplexing trade-off for layered space-time architectures with channel estimation error. ELECTRON LETT vol. 40 (12), 747-749. 10-06-2004
SCHORMANS JA and Ariffen SHS (2004). A Buffer with Two Priority Inputs. 2004 IEEE International Conference on Communications (ICC, Paris, June 2004). 01-06-2004
Pitts JM and SCHORMANS JA (2004). So You Think You Can Measure IP QoS? 2nd IEE Conference on QoS in IP Networks, Savoy Place, 2-3 March 2004. 02-03-2004
PITTS JM and Schormans JA (2004). So you think you can measure IP QoS. IEE Telecommunications QoS Conference, March 2004. 01-03-2004
SCHORMANS JA, Leung CM and Timotijevic T (2004). Accuracy of measurement techniques supporting QoS in packet-based intranet and extranet VPNs. IEE Proceedings - Communications: Special Edition on VPNs and Broadband Technology vol. 151 (1), 89-94. 01-02-2004
Schormans J (2004). Superhighways technology and broadband VPN. IEE P-COMMUN vol. 151 (1), 59-61. 01-02-2004
SCHORMANS JA and LEUNG CM (2004). Measurement for Guaranteeing QoS in Braodband Multiservice Networks. Mobile and Wireless Systems Beyond 3G: Managing New Business Opportunities , Editors: Pagani P. 01-01-2004
Ariffin SHS and Schormans JA (2004). Efficient accelerated simulation technique for packet switched networks: A buffer with two priority inputs. 01-01-2004
SCHORMANS JA and Leung CM (2004). Measurement for guaranteeing QoS in broadband multiservice networks. Mobile and wireless systems beyond 3G: managing new business opportunities, Professor Pagani (Ed) 01-01-2004
2003
SCHORMANS JA and Timotijevic T (2003). Bandwidth Overhead of Measurement Technology Used for Guaranteeing QoS in Packet Networks. International Network Optimization Conference (INOC), Paris, France, October 2003. 01-10-2003
Schormans J, Liu E, Stewart R and Cuthbert L (2003). Analytical technique for accelerating the simulation of packet networks. IEE P-COMMUN vol. 150 (5), 341-346. 01-10-2003
Ma A, Schormans J and Cuthbert L (2003). Aggregation technique for networks with power law traffic and application to accelerated simulation. IEE P-COMMUN vol. 150 (3), 177-183. 01-06-2003
Leung CM, Schormans JA, Pitts JM and Woolf M (2003). Accurate decay rate prediction for burst-scale queueing in packet buffers. ELECTRON LETT vol. 39 (2), 253-254. 23-01-2003
SCHORMANS JA and Ariffin SHS (2003). Accelerated Simulation Method for Power-Law Traffic and Non-FIFO Scheduling. London Communications Symposium, University College, London, 2003. 01-01-2003
SCHORMANS JA and Timotijevic T (2003). Bandwidth overhead of probe technology guaranteeing QoS in packet networks. Electronic Letters vol. 39 (10), 253-254. 01-01-2003
Schormans JA and Timotijevic T (2003). Evaluating the accuracy of active measurement of delay and loss in packet networks., Editors: Marshall A and Agoulmine N. 01-01-2003
Lu S and SCHORMANS JA (2003). Simulation Acceleration Techniques for Mobile Ad Hoc Networks. London Communications Symposium, University College London, 2003. 01-01-2003
SCHORMANS JA and Hasib M (2003). Limitations of Passive and Active Measurement in Packet Networks. London Communications Symposium, University College London, 2003. 01-01-2003
2002
Leung CM, Schormans JA and Ma AHI (2002). Measurement-based queue length distribution estimation for power-law traffic. ELECTRON LETT vol. 38 (24), 1608-1610. 21-11-2002
SCHORMANS JA and Al-Hammadi AS (2002). A Neural Network Techniques in ATM Congestion Control. MESM'02, 28-30 September 2002, American University Sharjah, Sharjah, UAE. 28-09-2002
Leung CM and Schormans JA (2002). Measurement-based traffic characteristic estimation for QoS-oriented IP networks. 01-07-2002
Schormans JA, CHEN X and Raza A (2002). Space-time Block Coded OFDM without Guarded Intervals. 9th IEEE International Conference on Telecommunications, Beijing, China - 23-26 June 2002. 23-06-2002
SCHORMANS JA and Ma HI (2002). Accelerated Simulation Modelling of Power-law Traffic via Aggregation. ITC2002, Beijing. China. 01-06-2002
SCHORMANS JA and Ma HI (2002). Efficient Simulation Modelling for Long Range Dependent Traffic. Presented at the Fourth Workshop on Rare Simulation and related Combinatorial Optimization Problems (RESIM/COP'02), April 11-12, 2002, Madrid, Spain. 11-04-2002
Ma AHI and Schormans JA (2002). Hybrid technique for analysis of multiplexed power-law traffic in broadband networks. ELECTRON LETT vol. 38 (6), 295-297. 14-03-2002
Miah B, Scharf EM, Cuthbert LG and Schormans JA (2002). A new charging scheme for ATM based on QoS. INT J COMMUN SYST vol. 15 (1), 85-100. 01-02-2002
SCHORMANS JA and Al-Hammadi AS (2002). A Neuro-Fuzzy Congestion Controller in a Prioritised ATM Switch. First International ICSC Conference on Neuro-Fuzzy Technologies, January 16-19, 2002 at University of Havana, Cuba. 16-01-2002
SCHORMANS JA and Leung CM (2002). Measurement-Based Traffic Characteristic Estimation for QoS Oriented IP Networks. The Journal of the Communications Network. vol. 1 (2) 01-01-2002
SCHORMANS J and Pitts JM (2002). Overflow Probability in Shared Cell Switched Buffers. IEEE Communications Letters, IEEExplore vol. 4 (5), 167-169. 01-01-2002
Ma AHI and Schormans JA (2002). Accelerated simulation modelling of Power-law traffic via aggregation. ICT02 Beijing, China 1 Jan 1970. 01-01-2002
SCHORMANS JA and Ariffin S (2002). ON/OFF Pareto Distributed Source at Burst Level: A Study of Fast Simulation Methods for Packet Network. PGNET2002. 01-01-2002
Pitts JM, ARROWSMITH DK, Schormans JA, Mondragon DK and Woolf RJ (2002). End-to-end performance in real time IP networks with self-similar behavior. IEEE Trans on Accoustics, Speech, and Signal Processing. vol. 4 01-01-2002
Pitts JM, Schormans JA, Woolf M, Mondragon RJ and Arrowsmith DK (2002). End to end performance in real time IP networks with self-similar behaviour. 01-01-2002
SCHORMANS JA and Leung CM (2002). Non-intrusive Measurement for QoS Inference. PGNET2002. 01-01-2002
Leung CM and Schormans JA (2002). Measurement-based end to end latency performance prediction for SLA verification., Editors: Luijten R, Wong E, Makki K and Park EK. 01-01-2002
2001
CUTHBERT LG, Schormans JA, Phillips CI, Liu E and Stoneley G (2001). Applications of Neural Networks to Accelerated Simulation of Internet Type WANs. 17th International Telecommunications Congress, Brazil. 01-12-2001
Schormans JA and Pitts JM (2001). From Erlangs to excess rate. J INST BRIT TELECOMM vol. 2, 54-60. 01-10-2001
SCHORMANS JA and Stewart RA (2001). Accurate Dimensioning of Service Level Agreements in Voice over IP Networks. Journal of the Institution of British Telecommunications Engineers vol. 2 (3), 109-111. 01-09-2001
Pitts JM, Schormans JA, Scharf EM and Pearmain AJ (2001). Tight bounds for the tail of the packet waiting time distribution in buffered networks. INT J COMMUN SYST vol. 14 (7), 715-723. 01-09-2001
Stewart R and Schormans J (2001). Accurate dimensioning of service level agreements in voice-over-IP networks. 01-07-2001
Cuthbert LG, Pitts JM, SCHORMANS JA and Liu E (2001). A Hybrid Technique for Accelerated Simulation of ATM Networks and Network Elements. ACM Transactions on Modeling and Computer Simulation (TOMACS) vol. 11 (2), 182-205. 01-04-2001
Al-Hammadi A and Schormans J (2001). Fuzzy congestion controller in a prioritised ATM switch. IEE P-COMMUN vol. 148 (2), 57-62. 01-04-2001
Pitts JM, Schormans JA, Phillips CI and Griffiths JM (2001). Accurate delay bounds for real-time IP services in presence of variable packet size. ELECTRON LETT vol. 37 (3), 166-167. 01-02-2001
SCHORMANS JA and Ma H (2001). A Fast Simulation Method for Modelling IP Networks. IEE 17th UK Teletraffic Symposium, Dublin 2001. 01-01-2001
SCHORMANS JA and Stewart R (2001). Prediction Bounds for End-to-End Delay Analysis in Enterprise IP Networks. IEE 17th UK Teletraffic Symposium, Dublin, 2001. 01-01-2001
2000
SCHORMANS JA, Stewart R, Pitts JM, Scharf EM, Pearmain A and Phillips CI (2000). Analysis of local internet / enterprise networking multiplexer for on-off VoIP sources. Electronics Letters vol. 36 (21), 1825-1826. 01-10-2000
Al-Hammadi A and Schormans J (2000). Access flow control scheme for ATM networks usingadaptive linear prediction. Electronics Letters, Institution of Engineering and Technology (IET) vol. 36 (17), 1509-1510. 17-08-2000
SCHORMANS JA and Timotijevic T (2000). ATM Level Performance Analysis on a DS-CDMA Satellite Link using DTX. IEE Proc. Comms vol. 147 (1) 01-02-2000
SCHORMANS JA, Pitts JM, Ma A, Scharf E, Pearmain A and Phillips CI (2000). Design rules and equivalent capacity for a Pareto source. electronics letters vol. 36 (15), 1274-1275. 01-01-2000
SCHORMANS JA, Awadalla H and Cuthbert LG (2000). Resource allocation strategy for ATM-based satellite systems. Electronics Letters vol. 36 (3), 281-282. 01-01-2000
SCHORMANS JA (2000). Access flow control scheme for ATM networks using adaptive linear prediction. Electronics Letters, IEE/IET vol. 36 (7), 1274-1275. 01-01-2000
SCHORMANS JA, Pitts JM, Scharf E, Pearmain A and Phillips CI (2000). Buffer Overflow Probability for Multiplexed On-Off VoIP Sources. Electronics Letters, IEE/IET vol. 36 (6), 523-524. 01-01-2000
SCHORMANS J, Pitts JM, Mondragon R, Scharf E, Pearmain A and Phillips CI (2000). Design rules for buffering overlapping Pareto processes in packetised networks. Electronics Letters, IEEExplore vol. 36 (12), 1086-1088. 01-01-2000
Liu EJ, Schormans J, Cuthbert L and Stoneley G (2000). A novel fast simulation method for ATM networks. 01-01-2000
Ma AHI, Schormans JA, Pitts JM, Scharf EM, Pearmain AJ and Phillips CI (2000). Design rules and equivalent capacity for buffering of Pareto source. Elec Lett vol. 36 (15), 1274-1275. 01-01-2000
Liu E, Schormans J, Cuthbert L and Stoneley G (2000). Novel fast simulation method for ATM networks. IEEE ATM Workshop, Proceedings, 387-393. 01-01-2000
Liu E, Cuthbert L, Schormans J and Stoneley G (2000). Neural network in fast simulation modelling. Proceedings of the IEEE-INNS-ENNS International Joint Conference on Neural Networks. IJCNN 2000. Neural Computing: New Challenges and Perspectives for the New Millennium. 01-01-2000
1999
Schormans J, Liu E, Cuthbert L and Stoneley G (1999). Analytic technique for accelerating simulation of generic network traffic. Electronics Letters vol. 35, 2168 -2170-2168 -2170. 01-12-1999
Pitts J and Schormans J (1999). Resource partitioning and management of inter-networks for heterogeneous services. 01-12-1999
Pitts J and Schormans J (1999). End to end QoS bounds for RTP based service sub-networks. 01-12-1999
Awadalla HO, Cuthbert LG and Schormans JA (1999). Improving the delay performance of ‘besteffort’ traffic over ATM satellite networks. Electronics Letters, Institution of Engineering and Technology (IET) vol. 35 (17), 1430-1432. 19-08-1999
Schormans JA (1999). Buffer partitioning formula for different traffic classes in ATM. International Journal of Communication Systems, Wiley vol. 12 (3), 175-180. 01-05-1999
Awadalla HO, Cuthbert LG and Schormans JA (1999). Framework for supporting real time VBR traffic over satellite networks. Electronics Letters vol. 35, 616 -617-616 -617. 01-04-1999
1998
Zeiss J and Schormans JA (1998). Analysing the interdeparture process in an ATM multiplexer. International Journal of Communication Systems, Wiley vol. 11 (5), 319-325. 01-09-1998
Ho LTH, Pitts JM, Samuel LG and Schormans JA (1998). Buffering packetised data: an examination of thecrossover effect. Electronics Letters, Institution of Engineering and Technology (IET) vol. 34 (17), 1637-1638. 20-08-1998
Schormans JA and Pitts JM (1998). Decay rate (ER) modelling of G/D/1 queue, and resultsfor ATMtelecommunications. Electronics Letters, Institution of Engineering and Technology (IET) vol. 34 (10), 943-945. 14-05-1998
1997
Schormans JA and Pitts JM (1997). Solution for M/G/1 queues. Electronics Letters, Institution of Engineering and Technology (IET) vol. 33 (25), 2109-2111. 04-12-1997
Yousef SY, Strange CM and Schormans JA (1997). ATM modelling: Parameterization of the 4-phase MMPP model for the superposed traffic sources. 01-12-1997
Yousef SY, Strange CM and Schormans JA (1997). ATM modelling: Parameterisation of 4-phase MMPPmodel for admission control of superposed traffic sources. Electronics Letters, Institution of Engineering and Technology (IET) vol. 33 (10), 829-830. 08-05-1997
1996
Schormans J and Pitts J (1996). New models for admission control of priority traffic in ATM networks. 01-12-1996
Schormans JA, Pitts JM, Clements BR and Scharf EM (1996). Approximation to M/D/1 for ATM CAC, buffer dimensioningand cellloss performance. Electronics Letters, Institution of Engineering and Technology (IET) vol. 32 (3), 164-165. 01-02-1996
Yousef SY and Schormans JA (1996). Performance, interarrival, and correlation analysis of four-phase MMPP model in ATM-based B-ISDN. IEE Proceedings - Communications, Institution of Engineering and Technology (IET) vol. 143 (6) 01-01-1996
1995
Schormans JA, Smith R and Phillips CI (1995). Performance evaluation of multipoint cellbuffering in ATM. Electronics Letters, Institution of Engineering and Technology (IET) vol. 31 (6), 431-432. 16-03-1995
Pitts JM (1995). Discretised fluid-flow analysis for ATM connection admission control. 5th IEE Conference on Telecommunications. 01-01-1995
1994
Schormans JA, Pitts J, Williams K and Cuthbert LG (1994). Equivalent capacity for on/off sources in ATM. Electronics Letters vol. 30, 1740 -1741-1740 -1741. 01-10-1994
Schormans J, Pitts J and Cuthbert L (1994). Exact fluid-flow analysis of single on/off source feeding an ATM buffer. Electronics Letters vol. 30, 1116 -1117-1116 -1117. 01-07-1994
Schormans J, Smith R, Phillips C, Pitts J and Cuthbert L (1994). Performance evaluation of point to multi-point cell buffering in ATM network switches. 01-03-1994
Schormans JA, Phillips CI, Smith R and Cuthbert LG (1994). Analysis of a finite shared buffer. Electronics Letters vol. 30, 8 -9-8 -9. 01-01-1994
1993
Schormans JA, Pitts JM and Scharf EM (1993). A priority queue with superimposed geometric batch arrivals. Stochastic Models, Taylor & Francis vol. 9 (1), 105-122. 01-01-1993
Schormans JA, Scharf EM and Pitts JM (1993). Waiting time probabilities in a statistical multiplexer with priorities. IEE Proceedings I Communications Speech and Vision, Institution of Engineering and Technology (IET) vol. 140 (4) 01-01-1993
1992
Schonnans JA, Scharf EM and Pitts JM (1992). Prioritised GEO/D/1 telecommunications switch model. Electronics Letters, Institution of Engineering and Technology (IET) vol. 28 (6), 597-598. 12-03-1992
Pitts JM and Schormans JA (1992). Renewal theory validation of burst level technique for ATM simulation. Electronics Letters, Institution of Engineering and Technology (IET) vol. 28 (2), 106-107. 16-01-1992
1990
Sun Z, Cosmas J, Cuthbert LG, Pitts JM and Schormans J (1990). Analytical studies of superposition GMDP traffic sources for ATM networks. 01-09-1990
Pitts JM and Schormans JA (1990). Analysis of ATM switch model (GEO/ATD/1) with time priorities. Electronics Letters, Institution of Engineering and Technology (IET) vol. 26 (15), 1192-1193. 19-07-1990
Schormans JA, Scharf EM and Pitts JM (1990). Analysis of telecommunications switch model (GEO/D/1) with time priorities. Electronics Letters, Institution of Engineering and Technology (IET) vol. 26 (5), 325-326. 01-03-1990
Grants
Grants of specific relevance to the Centre for Networks, Communications and SystemsBespoke network emulation - impact accelerationJohn Schormans
£19,032 EPSRC Engineering and Physical Sciences Research Council (01-12-2018 - 31-07-2019)