My research activities are classified into 3 major areas:

• Wireless Network and related research. The research covers mainly the wireless network from Ad Hoc to IP Mobility.
  • Ad Hoc network. My initial work has been on routing in a mobile environment. This has led to my initial work of using the public transport system, BUSES, to build a flexible backbone to carry traffic as there is more predictability in their movement. While routing remains an interest I have ventured into the area of Delay Tolerant Network and Multi-channel multi-interface communication.
  •  IP Mobility. As the convergence of network moves forward and the pervasiveness of wireless access, IP mobility will become an important requirement. My initial work has generated ONE international patent and a number of publications. The issues that need to be addressed are many diverse from multi-homing, QoS, etc..
    
    
• Grid/Cloud and related research.  My interest in this area originated from my initial work on parallel and distributed systems. I am currently the Director for Service Platform Lab., HP Labs Singapore which have a major focus in the area of Cloud Computing.
  • Infrastructure. A lot of my research has focus on the infrastructure, eg. Metering, replication algorithms. In this areas I am involved with  the Pacific Rim Application and Grid Middleware Assembly (PRAGMA) grid test-bed, a USA NSF initiative.   Service matching is an important area as we move towards a service oriented infrastructure.
  • Applications. I have been involved in the development of a number of applications using the Grid infrastructure, eg. Development of a Digital Media Grid for End-to-end rendering service under the Adaptive Enterprise@SG project.
    
    
• International Research and Education Network. My interest in this area started when I joined the Singapore Advance Research and Education Network committee in 1998. This has also helps me to look at some of the practical issues/problems in international network.
  • Building an efficient and effective network.  I have been working together with international R&E network community to build effective and efficient network that would support “bandwidth hungry” application, eg. HDTV transmission, telemedicine.  This involves a lot of coordination among the community.
  • Network measurement and monitoring. There are a lot of network monitoring and measurement tools. Understand and correlating them to extract meaning is certainly a challenging task. Initial work on measurement of the international research and education network , APAN. Currently involved with other international measurement projects.
  • IPv6. As the Internet grows there will coming a point where we will have to start moving network from IPv4 to IPv6 based. Thus, having the tools to ensure the smooth migration is essential.