Department of Electronic Engineering, CityU HK

Photo

 WONG, Eric Wing-Ming  (黃永明)
B.Sc., M.Phil. CUHK, Ph.D. UMASS/Amherst, SMIEEE

 Associate Professor

 


Room: G6416 Tel: (852) 3442-7706 Fax: (852) 3442-7791 Email: eeewong@cityu.edu.hk


Dr. Wong joined the City University of Hong Kong in the Department of Electronic Engineering in 1994. He received his B.Sc. and M.Phil. degrees in Electronic Engineering from the Chinese University of Hong Kong in 1988 and 1990 respectively, and his Ph.D. degree in Electrical and Computer Engineering from the University of Massachusetts at Amherst in 1994.  His current research interests include in the analysis and design of telecommunications networks, optical networks, and cellular networks. He served as a Guest Editor for IEEE Journal on Selected Areas in Communications - one of the highest ranked journals in the field of Telecommunications - for the special issue “Next-Generation Spectrum-Efficient and Elastic Optical Transport Networks” (vol. 31, no. 1, January 2013).

 

Dr. Eric Wong has more than twenty years of research experience in the analysis, design and optimization of telecommunications networks and the development of accurate and computationally efficient approximate methods for performance evaluation in those networks. One important example is his pioneering work on the Erlang fixed-point approximation (EFPA) for the analysis and design of circuit-switched networks that use dynamic routing. This work has supported a major network evolution implemented by AT&T over the past two decades in the US national telephone network. This includes the first workable approximate model for state-dependent dynamic routing [2]. The methodology has significantly reduced the computational effort required and since 1991 has been used by AT&T to design, dimension and optimize its telephone network using Real Time Network Routing (RTNR). His work is important to the successful evolution of the dynamic network. Dr. Wong's contribution in dynamic routing network design is referenced in the book Dynamic Routing in Telecommunications Networks (McGraw-Hill).

 

Recently, Dr. Wong made fundamental contributions in teletraffic modeling for blocking probability evaluation in overflow loss systems and networks, which potentially have applications in many telecommunications and service systems, e.g. cellular networks [55], optical networks [37,43,45,47], video-on-demand [10,24,27], emergency healthcare [56], and cloud data center services [48,51,54]. These are based on the development of the well-known decomposition methodology, which decomposes an overflow loss system/network into independent subsystems and applies a suitable node model to each subsystem. In particular, Dr. Wong, working with his research team and collaborators, has invented new teletraffic performance evaluation methods, namely the Overflow Priority Classification Approximation (OPCA) [22], the Information Exchange Surrogate Approximation (IESA) [46,58] and more recently the Information Exchange Surrogate Approximation for Cellular Networks (IESA-CN) [55].  IESA/OPCA can substantially improve the accuracy for performance evaluation over the well-known classical EFPA method and hence can potentially be applied to many networking applications. In particular, IESA-CN can be used for the design and analysis of 5G cellular networks.

 

Dr. Wong also has experience in software development. Dr. Wong has worked with Huawei to develop a software tool for evaluating and dimensioning Huawei's telecommunication network. In addition, Dr. Wong is carrying out an Innovation and Technology Fund (ITF) project (funded by the Hong Kong government) entitled "Working Software Tools for Dynamic Base Station Sleeping for Green Cellular Networks". The aim of this ITF project is to develop software tools to reduce 3G/4G networks' electricity cost and reduce energy consumption by switching off some components in under-utilized base stations during non-busy hours.

 

More recently, Dr. Wong has obtained another ITF project, entitled "Base Station Deployment and Dynamic User Association for 5G Millimeter Wave Cellular Networks". This project aims to develop novel techniques for next generation 5G millimeter wave (mmWave) cellular networks that will:
1. Develop an mmWave cellular network simulator based on a geometric stochastic model, using real Hong Kong street maps.
2. Using the simulator, design optimal base-station deployment techniques that meet 5G's high data rate and low latency requirements.
3. Using the simulator, develop techniques for dynamic user association and traffic offloading across macro-cell and small-cell base stations.

Most recently, Dr. Wong has obtained a Health and Medical Research Fund (HMRF) project, entitled ''Design, Modeling, Evaluation, and Optimization of an Efficient and Cost-Effective Intensive Care Network in Hong Kong''. The objective of the project is to develop optimization tools to maximize the acceptance rate of patients in a network of intensive care units (ICUs), making Hong Kong's ICU network more efficient and cost effective. The direct and most important impact is the saving of valuable human lives. In this project, we will develop patient referral policies that can potentially be used throughout Hong Kong. In addition, the analytical models developed in this project can potentially also be used in Hong Kong to evaluate the cost-effectiveness of its ICU network, to plan improvements to the network to meet future demand, and to effectively dimension ICUs in newly built hospitals.

Eric Wong talking in a Press Conference about New Technology developed at CityU saves at least 4.5% of Energy in Mobile Networks:

https://newscentre.cityu.edu.hk/media/news/2019/03/13/new-technology-developed-cityu-saves-least-45-energy-mobile-networks

https://newscentre.cityu.edu.hk/zh-hant/media/news/2019/03/13/new-technology-developed-cityu-saves-least-45-energy-mobile-networks

Eric Wong in a TV Program talking about Technology Talent Scheme under the ITF Project:

https://news.now.com/home/local/player?newsId=318093&catCode=124&topicId=566&main=y

https://news.now.com/home/local/player?newsId=318097


Selected Publications:

59. Shuo Li, H. C. Leung, Eric. W. M. Wong and C. S. Leung, "Enhancement of Extreme Learning Machine for Estimating Blocking Probability of OCS Networks with Fixed-Alternate Routing," to appear in IEEE Access.

58. Y. C. Chan and Eric W. M. Wong, “Blocking Probability Evaluation for Non-hierarchical Overflow Loss Systems IEEE Transactions on Communications, vol. 66, no. 5, May 2018. 

57. H. C. Leung, C. S. Leung, Eric. W. M. Wong and Shuo Li, “Extreme Learning Machine for Estimating Blocking Probability of Bufferless OBS/OPS NetworksIEEE/ OSA Journal of Optical Communications and Networking, vol. 9, pp. 682-692, August 2017.

56. Y. C. Chan, Eric W. M. Wong, G. Joynt, P. Lai and M. Zukerman, "Overflow Models for the Admission of Intensive Care Patients," Health Care Management Science, vol. 21, no. 4, December 2018.

55. J. Wu, Eric W. M. Wong, J. Guo, and M. Zukerman, "Performance Analysis of Green Cellular Networks with Selective Base-Station Sleeping," Performance Evaluation, vol. 111, pp. 17-36, May 2017.

54. J. Fu, B. Moran, J. Guo, Eric W. M. Wong and M. Zukerman, "Asymptotically Optimal Job Assignment for Energy-Efficient Processor-Sharing Server Farms," IEEE Journal on Selected Areas in Communications, vol. 34, no. 12, pp. 4008-4023, December 2016.

53. Y. C. Chan, J. Guo, Eric W. M. Wong and M. Zukerman, "Surrogate Models for Performance Evaluation of Multi-Skill Multi-Layer Overflow Loss Systems," Performance Evaluation, vol. 104, pp. 1–22, October 2016.

52. S. Li, M. Wang, Eric W. M. Wong, H. Overby and M. Zukerman, "Evaluation of Burst/Packet Loss Ratio in a Bufferless OBS/OPSNetwork with 1 + X Path Protection," IEEE Photonics Technology Letters, vol. 28, no. 15, pp. 1688-1691, August 2016.

51. J. Fu, J. Guo, Eric W. M. Wong and M. Zukerman, "Energy-Efficient Heuristics for Insensitive Job Assignment in Processor-Sharing Server Farms," IEEE Journal on Selected Areas in Communications,  vol. 33, no. 12, pp. 2878-2891, December 2015.

50. S. Li, M. Zukerman, M. Wang and Eric W. M. Wong, "Improving Throughput and Effective Utilization in OBS Networks," Optical Switching and Networking, vol. 18, no. 3, pp. 222-234, November 2015.

49. S. Li, M. Wang,  H. Overby,  Eric W. M. Wong and M. Zukerman, "Performance Evaluation of a Bufferless OBS/OPS Network With 1 + 1 Path Protection," IEEE Photonics Technology Letters, vol. 27, no. 20, pp. 2115-2118, October 2015.

48. Z. Rosberg, Y. Peng, J. Fu, J. Guo, Eric W. M. Wong and M. Zukerman, "Insensitive Job Assignment with Throughput and Energy Criteria for Processor-Sharing Server Farms," IEEE/ACM Transactions on Networking, vol. 22, no. 4, pp. 1257-1270, August 2014. 

47.M. Wang, S. Li, Eric W. M. Wong and M. Zukerman, "Performance Analysis of Circuit Switched Multi-service Multi-rate Networks with Alternative Routing," IEEE/OSA Journal of Lightwave Technology,  vol. 32, no. 2, pp. 179-200, January 2014.

46. Eric W. M. Wong, J. Guo, B. Moran and M. Zukerman, "Information Exchange Surrogates for Approximation of Blocking Probabilities in Overflow Loss Systems," Proc. The 25th International Teletraffic Congress (ITC), Shanghai, P. R. China, September 2013.

45. M. Wang, S. Li, Eric. W. M. Wong, and M. Zukerman,   "Performance Analysis of Circuit Switched Networks with Long-lived and Short-lived Connections," IEEE/OSA Journal of Optical Communications and Networking, vol. 5, no. 6, pp. 621-640, June 2013.

44. Eric W. M. Wong, B. Moran, A. Zalesky, Z. Rosberg and M. Zukerman, “On the accuracy of the OPC approximation for a symmetric overflow loss model,” Stochastic Models, Stochastic Models, vol. 29, no. 2, pp. 149-189, May 2013.

43. S. Li, M. Wang, Eric W. M. Wong, V. Abramov and M. Zukerman, “Bounds of the Overflow Priority Classification for Blocking Probability Approximation in OBS NetworksIEEE/OSA Journal of Optical Communications and Networking, vol. 5, no. 4, pp. 378-393, April 2013.

42. M. Wang, S. Li, Eric W. M. Wong and M. Zukerman, “Evaluating OBS by Effective UtilizationIEEE Communications Letters, , vol. 17, no. 3, pp. 576-579, March 2013.

41. V. Abramov, S. Li, M. Wang, Eric W. M. Wong and M. Zukerman, “Computation of Blocking Probability for Large Circuit Switched NetworksIEEE Communications Letters, vol. 16, no. 11, pp. 1892-1895, November 2012.

40. J. Zhang, Eric W. M. Wong and M. Zukerman, “Modeling an OBS Node under Critical Load and High Utilization Conditions,” IEEE Communications Letters, vol. 16, no. 4, pp. 544-546, April 2012.

39. J. Zhang, Y. Peng, Eric W. M. Wong and M. Zukerman, “Sensitivity of Blocking Probability in the Generalized Engset Model for OBSIEEE Communications Letters, vol. 15, no. 11, pp. 1243-1245, November 2011.

38. T. Guo, C. H. Foh, J. Cai, D. Niyato, and Eric W. M. Wong, "Performance Evaluation of IPTV over Wireless Home Networks," IEEE Transactions on Multimedia, vol. 13, no. 5, pp. 1116-1126, October 2011.

37. Eric W. M. Wong, J. Baliga, M. Zukerman, A. Zalesky and G. Raskutti, “A New Method for Blocking Probability Evaluation in OBS/OPS Networks with Deflection RoutingIEEE/OSA Journal of Lightwave Technology, vol. 27, no. 23, pp. 5335–5347, 1 December, 2009.

36. Eric W. M. Wong, A. Zalesky and M. Zukerman,  “A State-Dependent Approximation for the Generalized Engset ModelIEEE Communications Letters, vol. 13, no. 12, December 2009.

35. J. Baliga, Eric W. M. Wong and M. Zukerman, “Analysis of Bufferless OBS/OPS Networks with Multiple DeflectionsIEEE Communications Letters, vol. 13, no. 12, December 2009.

34. X. G. Tang and Eric W. M. Wong, “Information traffic in scale-free networks with fluctuations in packet generation ratePhysica A: Statistical Mechanics and its Applications, vol. 388, no. 22, pp. 4797-4802, 15 November 2009.

33. T. K. C. Chan, Eric W. M. Wong and Y. W. Leung, “High-Capacity Time-Domain Wavelength Interleaved NetworksIEEE/OSA Journal of Lightwave Technology, vol. 27, no. 17, pp. 3948-3958, September 2009.

32. Eric W. M. Wong, L. H. Andrew, T. Cui, B. Moran, A. Zalesky, R. S. Tucker, and M. Zukerman, “Towards a Bufferless Optical InternetIEEE/OSA Journal of Lightwave Technology, vol. 27, no. 14, pp. 2817-2833, 15 July 2009.       

31. X. G. Tang, Eric W. M. Wong and Z. X. Wu, “Integrating Network Structure and Dynamic Information for Better Routing Strategy on Scale-free NetworksPhysica A: Statistical Mechanics and its Applications, vol. 388, no. 12, pp. 2547-2554, 15 June 2009.

30. Eric W. M. Wong and C. H. Foh, “Analysis of Cognitive Radio Spectrum Access with Finite User PopulationIEEE Communications Letters, vol. 13, no. 5, pp. 294-296, May 2009.

29. Eric W. M. Wong and M. Zukerman, “An Optical Hybrid Switch With Circuit Queueing for Burst ClearingIEEE/OSA Journal of Lightwave Technology, vol. 26, no. 21, November 2008.

28. Z. X. Wu, G. Peng, Eric W. M. Wong, and K. H. Yeung, “Improved Routing Strategies for Data Traffic in Scale-Free NetworksJournal of Statistical Mechanics: Theory and Experiment, no. 11, P11002, November, 2008.

27. J. Guo, Eric W. M. Wong, S. Chan, P. Taylor, M. Zukerman and K. S. Tang, “Combination Load Balancing for Interactive Video-on-demand SystemsIEEE Transactions on Circuits and Systems for Video Technology, vol. 18, no. 7, pp. 937–948, July 2008.

26. J. Guo, Yi Wang, K. S. Tang, S. Chan, Eric W. M. Wong, P. Taylor, and M. Zukerman, “Evolutionary Optimization of File Assignment for a Large Scale Video-on-demand SystemIEEE Transactions on Knowledge and Data Engineering, vol. 20, no. 6, pp. 836-850, June 2008. 

25. Z. X. Wu, G. Peng, W. X. Wang, S. Chan, and Eric W. M. Wong, “Cascading failure spreading on weighted heterogeneous networksJournal of Statistical Mechanics: Theory and Experiment, no. 5, P05013, May 2008.

24. J. Guo, Eric W. M. Wong, S. Chan, P. Taylor, M. Zukerman and K. S. Tang, “Performance Analysis of Resource Selection Schemes for a Large Scale Video-on-demand SystemIEEE Transactions on Multimedia, vol. 10, no. 1, pp. 153-158, January 2008.   

23. A. Zalesky, H. L. Vu, Z. Rosberg, Eric W. M. Wong and M. Zukerman, “Stabilizing Deflection Routing in Optical Burst Switched Networks,”  IEEE Journal on Selected Areas in Communications, supplement on optical communications and networking, vol. 25, no. 6, pp. 3-19, August 2007.

22. Eric W. M. Wong, A. Zalesky, Z. Rosberg and M. Zukerman, “A New Method for Approximating Blocking Probability in Overflow Loss NetworksComputer Networks. vol. 51, no. 11, pp. 2958-2975, 8 August 2007.

21. G. Raskutti, A. Zalesky, Eric W. M. Wong and M. Zukerman, “Enhanced Blocking Probability Evaluation Method for Circuit-Switched Trunk Reservation Networks,” IEEE Communications Letters, vol.11 no.6, June 2007.

20. A. Zalesky, H. L. Vu, Z. Rosberg, Eric W. M. Wong and M. Zukerman, “OBS Contention Resolution PerformancePerformance Evaluation, vol. 64, no. 4, pp. 357-373, May 2007.

19. Eric W. M. Wong, A. Zalesky and M. Zukerman, “On Generalizations of the Engset ModelIEEE Communications Letters, vol. 11, no. 4, pp. 360–362, April 2007.

18. Eric W. M. Wong and M. Zukerman, “Bandwidth and Buffer Tradeoffs in Optical Packet SwitchingIEEE/OSA Journal of Lightwave Technology,  vol. 24, no. 12, pp. 4790–4798, Dec. 2006.

17. Eric W. M. Wong and M. Zukerman, “Performance evaluation of an optical hybrid switch with circuit queued reservations and circuit priority preemptionOptics Express, vol. 14, no. 23, pp. 11043–11070, November 2006.

16. T. K. C. Chan, Eric W. M. Wong and Y. W. Leung, “Shared-by-Wavelength-Switches: A Node Architecture Using Small Optical Switches and Shared Wavelength ConvertersIEEE Photonics Technology Letters, vol.18, no.12, pp. 1335–1337, June 2006.

15. Eric W. M. Wong and M. Zukerman, “Performance Evaluation for an Optical Hybrid Switch with Circuit Queued ReservationsOSA Optics Express, vol. 13, pp. 9446–9459, November, 2005.

14. H. L. Vu, A. Zalesky, Eric W. M. Wong, Z. Rosberg and M. S. Bilgrami, M. Zukerman and R. S. Tucker, “Scalable Performance Evaluation of a Hybrid Optical SwitchIEEE/OSA Journal of Lightwave Technology, vol. 23, no. 10, pp. 2961–2973, Oct. 2005.

13. K. S. Tang, Eric W. M. Wong, S. Chan and K. T. Ko, “Optimal Video Placement Scheme for Batching VOD ServicesIEEE Transactions on Broadcasting, vol. 50, no. 1, pp. 16 - 25, March 2004.

12. A. Zalesky, Eric W. M. Wong, M. Zukerman, H. L. Vu and R. S. Tucker, “Performance Analysis of an OBS Edge RouterIEEE Photonics Technology Letters, vol. 16, no. 2, pp. 695-697, Feb. 2004.

11. M. Zukerman, Eric W. M. Wong, Z. Rosberg, G. M. Lee and H. L. Vu, “On Teletraffic Applications to OBSIEEE Communications Letters, vol. 8, no. 2, pp. 116-118, Feb. 2004.

10. Eric W. M. Wong and S. Chan, “Performance Modeling of Video-on-Demand Systems in Broadband NetworksIEEE Transactions on Circuits and Systems for Video Technology, vol. 11, No. 7, pp. 848-859, July, 2001.

9. Y. W. Leung and Eric W. M. Wong, “An Incentive Charging Scheme for Video-on-DemandJournal of the Operational Research Society, vol. 52, no. 1, pp. 55-63, January, 2001.

8.   Eric W. M. Wong, K. M. Chan, and T. S. Yum, “Analysis of Rerouting in Circuit-Switched NetworksIEEE/ACM Transactions on Networking, vol. 8, no.3, pp. 419-427, June 2000.

7.   Eric W. M. Wong, T. S. Yum and K. M. Chan, “A Taxonomy of Rerouting in Circuited-Switched NetworksIEEE Communications Magazine, vol. 37, pp. 116-122, Nov. 1999.

6.   S. Chan, Eric W. M. Wong, K. T. Ko, “Fair Packet Discarding for Controlling ABR Traffic in ATM NetworksIEEE Transactions on Communications, vol. 45, pp. 913-916, August 1997.

5.   V. O. K. Li, W. Liao, X. Qiu, and Eric W. M. Wong, “Performance Model of  Interactive Video-on-Demand SystemIEEE Journal on Selected Areas in Communications, vol. 14, no. 6, pp. 1151-1161, August 1996.

4.   Eric W. M. Wong, T. S. Yum, and K. M. Chan, “Analysis of the M and M2 Routings in Circuit-Switched Networks,” European Transactions on Telecommunications, vol. 6, no. 5, pp. 613-619, Sept.-Oct. 1995. An earlier version appeared in Proceedings, IEEE GLOBECOM ’92, Orlando, Florida, vol.3, pp. 1487 - 1492, Dec. 1992. 3.   Eric W. M. Wong and T. S. Yum, “The optimal multi-copy alohaIEEE Transactions on Automatic Control, vol. 39, no. 6, pp. 1233-6, Jun. 1994.

3.   Eric W. M. Wong and T. S. Yum, “A Controlled Multi-Access Protocol for Packet Satellite CommunicationsIEEE Transactions on Communications, vol. COM-39, no. 7, pp. 1133-1140, July 1991.

2.   Eric W. M. Wong and T. S. Yum, “Maximum Free Circuit Routing in Circuit-Switched Networks", Proceedings, IEEE INFOCOM ’90, San Francisco, California, June 1990.

1. T. S. Yum and Eric W. M. Wong, “The Scheduled Retransmission Multi-Access Protocol for Packet Satellite Communications,” IEEE Transactions on Information Theory, vol. IT-35, no. 6, pp. 1319-1324, Nov. 1989.       

 

 

 

Updated on 20 March 2019