Kok Keong Chai (Michael) BEng (Hons), MSc, PhD

 Lecturer in Telecommunications; Internet of Things Degree Programme Lead (Joint Programme with BUPT)

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I received my BEng (Hons) with First Class honours, MSc and PhD, in 1998, 1999 and 2007 respectively. My PhD thesis was on adaptive Orthogonal Frequency Division Multiplexing (OFDM) for wireless communications. From 2002 to 2008, I was at   Staffordshire University as a senior lecturer. I joined School of Electronic Engineering and Computer Science (EECS), Queen Mary University of London (QMUL) on August 2008 as a lecturer. I am a lecturer in Telecommunications and Internet of Things Programme Lead for Joint Programme QMUL between Beijing University of Posts and Telecommunications (BUPT) . I am a member in the Networks research group at QMUL and my current research interests include dynamic resource management wireless communications, medium access control (MAC) for machine to machine communications and networks, and sensing and prediction in distributed smart grid networks. I currently teach Telecom Systems, Internet Protocols and Networks and Protocols at QMUL and between QMUL and BUPT.

Awards

- 2012 Faculty Science & Engineering Outstanding Contribution to Teaching Award
- 2011 IET International Conference on Communication Technology and Application (ICCTA) Best Paper Award
- 2010 International Conference on Mobile Ubiquitous Computing, Systems, Services and Technologies (UBICOMM) Best Paper Award
- 2001 Third SHARC International DSP Conference Best Paper Award

 

  • News
  • Research
  • Teaching
  • Publications
  • Resources
  • About me and contact

NEWS:

Two post-doc reserach assistant posts will be opening soon on ESRC funded project on "Improving the Robustness of Urban Electricity Networks". The research project involves 5 European partners. This project focuses on utilising the decentralised nature of future energy generation to make them more robust to attacks, and on minimising impact of power outages on associated critical infrastructures such as water and gas supply, communication systems, public transport, and road traffic control. The aim to understand what social and technical measure should be considered when implementing these new technologies for the benefit of all stakeholders.The successful candidates are expected to hold a PhD in the research area of energy model prediction for energy distribution planning and energy correlation between human activities and energy prediction; and the classification of security threats. Outstanding candidates without a PhD, but having directly relevant research or practical experience are also welcome to apply. Informal inquiries about these posts may be directed to Dr Michael Chai (Michael.Chai@qmul.ac.uk) or Dr Yue Chen (Yue.Chen@qmul.ac.uk)

Call for paper [deadline: July 21, 2014 (extended)]: Wiley’s International Journal of Communication Systems: Special Issue on Energy Efficient Wireless Communication Networks with QoS. Click here for more info

 

 

Research

Current Projects

- Principal Investigator - Smart Grid: IRENE Improving the Robustness of Urban Electricity Networks funded by ESRC/TSB (£216k, Oct 2014 for 30 months )

 

Research Interests

- Dynamic resource management wireless communications;
- Efficient and reliable machine to machine communications and networks;
- Energy efficent protocols for home area networks and home automation;
- Internet of Things in intelligent transport systems;
- Energy demand prediction and controlling in smart grid

Current PhD students

- Miss Yanru Wang (First supervisor) on Low Power WiFi
- Miss Yun Li (First supervisor) on Delay and Energy Efficient Duty Cycle Control for Beacon-enabled IEEE 802.15.4 Networks
- Miss Liumeng Song (First supervisor) on Energy Efficient Cooperative Communication for Cluster-based Machine-to-Machine Capillary Networks
- Miss Jingjing Zhao (First supervisor) on Radio Resource Allocation for Device-to-Device Communications
- Miss Dan Zhao (Third examiner) on Resource Allocation Schemes in Wireless Communication Systems Powered by Renewable Energy Resources
- Miss Dantong Liu (Third examiner) on Optimisation for Radio Resource Management in HetNets
- Miss Anqi He (Third examiner) on Energy Efficient Heterogeneous Wireless Network

Former PhD students

- Dr Lexi Xu (Advisor), PhD project title: Self-organising load balancing for OFDMA cellular networks
- Miss Rehana Kausar (Second supervisor), PhD project title: QoS Aware Packet Scheduling in the Downlink of LTE-Advanced Networks

Teaching

2014/15
- Internet Protocols (EBU5403) with Dr Yue Chen
- Networks and Protocols (EBU5504) with Dr Jesús Requena Carrión
- Telecoms Systems (ECS525U) with Dr John Schormans

2013/14
- Internet Protocols (EBU5403) with Dr Yue Chen
- Networks and Protocols (EBU5504) with Dr Hamed Haddadi
- Telecoms Systems (ECS525U) with Dr Athen Ma

2008/09 to 2012/13
- Internet Protocols (EBU5403)
- Telecoms Systems (EBU5302)
- Telecoms Systems (ELE302)
- Software Engineering (EBU5304)
- Software Engineering (ELE304)

Publications

Journals

D. Liu, Y. Chen, K. K. Chai, T. Zhang, M. Elkashlan, “Opportunistic User Association for Multi-service HetNets Using Nash Bargaining Solution”, IEEE Communications Letters, VOL.18, NO. 3, March 2014

J. Cao, T. Zhang, Z. Zeng, Y. Chen and K. K. Chai, “Multi-Relay Selection Schemes Based on Evolutionary Algorithm in Cooperative Relay Networks”, Wiley International Journal of Communication Systems, 2013

A Le, J Loo, A Lasebae, A Vinel, Y Chen and K. K. Chai, “The Impact of Rank Attack on Network Topology of Routing Protocol for Low-Power and Lossy Networks”, IEEE Sensors Journal, Vol. 13, No. 10, Oct 2013 (Top 25 download in third quater 2013)

D Liu, Y Chen, T Zhang, K. K. Chai, J Loo, and A Vinel, “Stackelberg Game Based Cooperative User Relay Assisted Load Balancing in Cellular Networks”, IEEE Communications Letters, Vol. 17, Issue 2, Feb 2013

L. Xu, Y. Chen, K. K. Chai, J. Schormans and L. G. Cuthbert, “Self-Organising Cluster-Based Cooperative Load Balancing in OFDMA Cellular Networks”, Wireless Communications and Mobile Computing, DOI: 10.1002/wcm.2394, 2013

M. A. Khalid, K. K. Chai, “Performance Comparison of Ad Hoc Routing Protocols in e-Health Applications”, Computer Science Journal, Vol. 2, Issue 1, April 2012

Y. Alfadhl, K. K. Chai, Y. Chen, L. Cuthbert, X. Chen, T. Zhang, “Analysis of Indoor Location Sensing Systems Based on Radio Channel Fingerprinting”, Technical Journal of China Communications, 2011, Vol. 8  Issue (8): pg 1-12

R. Kausar, Y. Chen, K. K. Chai, J. Schormans “Packet Scheduling Architecture with Service Specific Queue Sorting and Adaptive Time Domain Scheduling Algorithms for LTE-Advanced Networks”, International Journal on Advances in Networks and Services, Vol 4 No 3 & 4, 2011

Conference papers

2014

L. Song, K. K. Chai, Y. Chen, J. Schormans, "Energy Efficient Cooperative MISO Scheme for Cluster-based M2M Capillary Networks", 17th International Symposium on Wireless Personal Multimedia Communications (WPMC'2014), Sydney, Australia, 7-10 September 2014

Y. Li, K. K. Chai, Y. Chen, J Loo, "Optimised Delay-Energy Aware Duty Cycle Control for IEEE 802.15.4 with Cumulative Acknowledgement", the 2014 IEEE 25th International Symposium on Personal, Indoor
and Mobile Radio Communications (PIMRC 2014), Washington, USA, 2-5 September 2014

D. Liu, Y. Chen, K. K. Chai, T. Zhang, "Optimal User Association for Delay-Power Tradeoffs in HetNets with Hybrid Energy Sources", the 2014 IEEE 25th International Symposium on Personal, Indoor
and Mobile Radio Communications (PIMRC 2014), Washington, USA, 2-5 September 2014

Y. Li, K. K. Chai, Y. Chen, J Loo, "Low Complexity Duty Cycle Control with Joint Delay and Energy Efficiency for Beacon-enabled IEEE 802.15.4 Wireless Sensor Networks", The Eleventh International Symposium on Wireless Communication Systems 2014 (ISWCS'2014), Barcelona, Spain, 26-29 August 2014

T. Zhang, L. An, Y. Chen, K. K. Chai, " Aggregate Interference Statistical Modeling and User Outage Analysis of Heterogeneous Cellular Networks",  IEEE International Conference on Communications (ICC 2014), Sydney, Australia, 10-14 June 2014

D. Liu, Y. Chen, T. Zhang, K. K. Chai, "Nash Bargaining Solution Based User Association Optimization in HetNets", the 11th Annual IEEE Consumer Communications and Networking Conference, 10-13 Jan, 2014

2013

Y. Li, K. K. Chai, Y. Chen, “Optimal Transmission Policy with Joint Minimization on Energy Consumption and Delay for Wireless Sensor Networks”, 15th IEEE International Conference on Communication Technology (ICCT2013), Guilin, China, 17-19 Nov 2013 

D. Liu, Y. Chen, K. K. Chai, T. Zhang, "Performance Evaluation of Nash Bargaining Solution Based User Association in HetNet", IEEE 9th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob), Lyon, France, 7-9 Oct 2013

K. K. Chai, S. Jimaa, Y. Li, Y. Chen, "Multichannel MAC for Energy Efficient Home Area Networks", 1st International Workshop on GReen Optimized Wireless Networks (GROWN'13), Lyon, France, 7-9 Oct 2013

L Xu, Y Chen, K K Chai, D Liu, S Yang, J Schormans, “User Relay assisted Traffic Shifting in LTE-Advanced Systems”, IEEE VTC-Spring 2013, Dresden, Germany, 2-5 June 2013

S Deng, J Ye, B Wang, L Du, W Wang, Y Zheng, K K Chai, “Dynamic Channel Reservation Based on Forecast in Cognitive Radio”, IEEE VTC-Spring 2013, Dresden, Germany, 2-5 June 2013

Y Tan, K. K. Chai, et al, “Smart Energy Management System for Home Area Network”, 3rd International Conference on Smart Grids, Green Communications and IT Energy-aware Technologies, ENERGY 2013, Lisbon, Portugal, 24th – 29th March 2013

2012

K Niu, J Sun, Z He, K. K. Chai, “LTE eNodeB prototype based on GPP platform”, IEEE GLOBECOM 2012 Workshop: International Workshop on Cloud Base-Station and Large-Scale Cooperative Communications, GC'12 Workshop – CACAO, California, USA, 3-7th December 2012

Y Lai, K. K. Chai, Y. Chen, “A Utility-based Intelligent Network Selection for 3G and WLAN Heterogeneous Networks”, IET International Conference on Wireless Communications and Applications, ICWCA2012, Kuala Lumpur, Malaysia, 8-10th October 2012

K Niu, J Sun, K Chen, K. K. Chai, “TD-LTE eNodeB prototype using general purpose processor”, The 1st International ICST Workshop on C-RAN, C-RAN 2012, Kunming, China, 7 August 2012

Y. Chen, D. Liu, T. Zhang, K. K. Chai, “Cooperative User Relay Assisted Load Balancing in LTE Networks”, Poster, IEEE The First Women’s Workshop on Communications and Signal Processing, Alberta, Canada, 13-15 July 2012

R. Kausar, Y. Chen, K. K. Chai, “An Intelligent Scheduling Architecture for Mixed Traffic in LTE-Advanced”, IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'12, Sydney, 9-12 Sept 2012

D. Liu, Y. Chen, K. K. Chai, L.G. Cuthbert, T. Zhang, ‘Cognitive Cooperative Traffic Offloading Scheme over Heterogeneous Networks’, 7th International Conference on Communications and Networking in China, Kunming, People's Republic of China, 8-10 August, 2012.

L. Xu, Y. Chen, K. K. Chai, T. Zhang, L. Cuthbert, “Cooperative Load Balancing for OFDMA Cellular Networks”, 18th European Wireless Conference 2012, EW2012, Poznan, Poland, 18-20 April 2012

2011

Q. Liu, J. Tu, Y. Yan, K. K. Chai, Yue Chen, “Bandwidth-efficient Contention-free Mechanism for Wireless Networks”, 2011 IET International Communication Conference on Wireless, Mobile & Computing, Shanghai, China, 14-16 Nov 2011

X. Chen, Y. Alfadhl, K. K. Chai, “An indoor item finder with active RFID tags”, 2011 IET International Conference on Communication Technology and Application, ICCAT2011, Beijing, 14-16 Oct 2011

F. Peng, Y. Gao, Y. Chen, K. K. Chai, L.G. Cuthbert, “Using TV White Space for Interference Mitigation in LTE Femtocell Networks”, 2011 IET International Conference on Communication Technology and Application, ICCTA, Beijing, 14-16 Oct 2011

R. Kausar, Y. Chen, K. K. Chai, “QoS Aware Packet Scheduling with Adaptive Resource Allocation for OFDMA Based LTE‐Advanced Networks”, 2011 IET International Conference on Communication Technology and Application, ICCTA2011, Beijing, 14-16 Oct 2011

S. Jimaa, K. K. Chai, Y. Chen, Y. Alfadhl, “LTE- A an Overview and Future Research Areas”, the Second International Workshop on the Performance Enhancements in MIMO-OFDM Systems, Shanghai,10 Oct 2011

R. Kausar, Y Chen, K. K. Chai, “Service Specific Queue Sorting and Scheduling Algorithm for OFDMA-Based LTE-Advanced Networks”, 6th International Conference on Broadband and Wireless Computing, Communications and Applications, Spain, 26-28 October 2011 

R. Kausar, Y Chen, K. K. Chai, “Adaptive Time Domain Scheduling Algorithm for OFDMA Based LTE-Advanced Networks”, IEEE 7th International Conference on Wireless and Mobile Computing, Networking and Communications, Shanghai, 10-12 October 2011

X. Fang, K. K. Chai, Y Alfadhl, Y Sun, “Evaluation of Ad-hoc routing protocols in Vehicular Ad-hoc Network using OPNET”, 11th Int’l Conference on ITS Telecommunications, Russia, 23-25 Aug 2011

T. Jiang, Y Alfadhl, K. K. Chai, “Efficient Dynamic Scheduling Scheme between Vehicles and Roadside Units based on IEEE 802.11p/WAVE Communication Standard”, 11th Int’l Conference on ITS Telecommunications, Russia, 23-25 Aug 2011

Prior 2010

R. Kausar, Y. Chen, K. K. Chai, L. Cuthbert, J Schormans, “QoS Aware Mixed Traffic Packet Scheduling in OFDMA-based LTE-Advanced Networks, UBICOMM 2010, Florence, Italy 25-30 Oct 2010 

K. K. Chai, S A Jimaa, T. Alukaidey, B. Sharif, “OFDM Frequency Offset Estimation using MUSIC Algorithm”, IASTED International Conference on Communication Systems and Networks, CNS’2002, Benalmádena, Spain, 8-10 Sept 2003

K. K. Chai, S. A. Jimaa, T Alukaidey, “New Study on OFDM with Root-MUSIC Algorithm at 60GHz Band”, IASTED International Conference on Communication Systems and Networks, CNS’2002, Malaga, Spain, 9-12 Sept 2002

K. K. Chai, K. K. Loo, T Alukaidey, S A Jimaa, K Salman, “Performance of FFT Processor in future OFDM system”, IASTED International Conference on Signal Processing, Pattern Recognition, and Applications (SPPRA 2002), June25-28 2002

K. K. Loo, K. K. Chai, T Alukaidey, S A Jimaa, K Salman, “The Performance of Turbo Codes and OFDM over the Fading and AWGN Channels”, Communication Systems, Networks and Digital Signal Processing, CSNDSP' 2002 Conference, Staffordshire University, 15-17 July 2002

K. K. Loo, K. K. Chai, T Alukaidey, S A Jimaa, “Reduced Complexity Max-Log-MAP Decoder on SHARC DSP”, in Proc., Third SHARC Int. DSP Conf., Northeastern University, Boston, USA, pp. 143-149, 10-11 September 2001 

K.K. Chai, K.K. Loo, T. Alukaidey, S.A. Jimaa, “Implementation of SHARC FFT Processor in OFDM System”, in Proc., Third SHARC Int. DSP Conf., Northeastern University, Boston, USA, pp. 160-165, 10-11 September 2001

K.K. Loo, K. K. Chai, T. Alukaidey, S. A. Jimaa, “Wireless Multi-SHARC DSP Connectivity Using Bluetooth”, Microwave Product Digest, April 2001. Can be found at the following link http://www.mpdigest.com/Articles/Apr2001/analog/Default.htm

F.J. Arenal, K.K. Loo, K.K. Chai, S.A. Jimaa, T. Alukaidey, “Implementation of a WCDMA Modulator on SHARC DSP”, in Proc., Third SHARC Int. DSP Conf., Northeastern University, Boston, USA, pp. 95-103, 11-13 September 2000

K.K. Loo, K.K. Chai, T. Alukaidey, S.A. Jimaa, “Wireless Multi-SHARC DSP Connectivity Using Bluetooth”, in Proc., Third SHARC Int. DSP Conf., Northeastern University, Boston, USA, pp. 111-115, 11-13 September 2000

Useful Resources

  • About me and Contact

    Contact:

    Room E206, Engineering Building
    School of Electroic Engineering and Computer Science
    Queen Mary University of London
    Engineering Building, Mile End, London, E14 NS, United Kingdom
    Telephone: +44 (0) 20 7882 5343
    Email: michael.chai@qmul.ac.uk
    Skype: k.k.chai
    Linkedin: http://uk.linkedin.com/pub/michael-chai/23/759/b72/

    Relevant Working Experience


2008 – Present, Lecturer in Telecommunications and Internet of Things Degree Programme Lead (Joint Programme with BUPT)  (School of Electronic Engineering and Computer Science, Queen Mary, University of London)
Main responsibilities: - Undertake a range of teaching, developing and assessment wireless, networks and software engineering modules
- Supervise undergraduate project students in Joint Programme and postgraduate students in QMUL master degree programme;
- Develop and maintain research link in the field of wireless networks;
- Supervise and co-supervise postgraduate research students (MSc by research and PhD);
- Organise and co-organise conferences and workshops;
- Generate research incomes.


2002 – 2008, Senior Lecturer in Network systems, multimedia systems and software development (Faculty of Computing, Engineering and Technology, Staffordshire University)
Main responsibilities: - Taught, developed and assessed modules in the areas of mobile communication systems, computer networks and multimedia systems;
- Cisco Certified Network Associate (CCNA) instructor;
- Contributed the development of the Faculty curriculum at Applied Computing Division;
- Contributed student support in administrative and pastoral role;
- Managed and co-ordinated peer observation activity within Applied Computing Division;
- Level 2 and 3 tutor; final year project coordination;
- International partnership coordination


1998 - 1999, Research Assistant (Department of Electronic, Communication and Electrical Engineering, University of Hertfordshire)
Main responsibilities: Developed a novel DSP Motion Control in DC Brushless Motor


Academic Qualifications

Certificate in Learning and Teaching (2010)
Doctor of Philosophy in Mobile Communication Networks (2007)
Master of Science in Electronic in Digital Systems (1999)
Degree in Electrical and Electronic Engineering in Communication systems (1998)


Membership of Professional Bodies and Professional Activities

Member of Institute of Electrical and Electronic Engineer (IEEE); Member of the Technical Program Committee (TPC) for IEEE Wireless Communications and Networking Conference (WCNC) 2012, IET International Conference on Communication Technology and Application (IET ICCTA) 2011, IEEE International Workshop on the Performance Enhancements in MIMO-OFDM Systems (PEMOS) 2011, 2012, 2013 and IEEE Symposium on Industrial Electronics and Applications (ISIEA) 2012