Research

Dr. Kafle’s research areas are information technology and communication networking. He designs network architectures and protocols, models them, and evaluates their performance after having them implemented in experimental systems.

His research keywords are:

  • Internet (TCP/IP)
  • Network architectures
  • Network protocols
  • Routing protocols
  • Protocol verification
  • Network management and monitoring
  • Mobile communication systems
  • IP mobility protocols design and analysis
  • Modeling, implementation, and simulation of networks
  • Network security
  • Standardization

Communication networks have become indispensable to our life. We have been using communication networks for a variety of services such as telecommunication, information access, entertainment, education, health-care, shopping, and banking. The Internet is the most widely used communication network. It has become a converged network for providing all the traditional communication services – fixed and mobile telephone, radio, and television – as well as new online data services. The original Internet architecture designed and developed about 40 years ago was rather simple as its only objective was to provide best-effort packet delivery from one computer to another without maintaining any communication states, i.e., information about individual communication sessions or calls, inside the network. However, the current Internet has become rather complex because of a lot of new functions added randomly to the original architecture to enable it to support a variety of emerging services and satisfy their requirements such as security, quality of service (QoS), larger IP addressing space, mobility, and reliability. Consequently, the Internet architecture has become suboptimal.

Therefore, in order to develop a sustainable network to serve the future society, we have to research and develop new networking technologies and architectures. For this purpose, future Internet related research activities are being pursued worldwide. In Japan, the future Internet research activities are being carried out under the New Generation Network research projects. Dr. Kafle has been actively involved in R&D of the New Generation Network and pursuing his research on emerging network technologies since 2006.

Recent research topics:

  • New naming and addressing schemes
  • ID/locator split architectures
  • Name resolution
  • Interoperability among heterogeneous network-layer protocols (e.g., IPv4 and IPv6)
  • Integration of resource-constrained sensors into the Internet
  • Information-centric or content-centric networking (ICN/CCN)
  • Distributed mobility management
  • Delay or disruption tolerant networking (DTN)
  • Network security, privacy and trust
  • Internet of things (IoT) and Machine-to-machine (M2M) communications

As a member of the AKARI Architecture Design Project for New Generation Network, he has designed and implemented the HIMALIS (Heterogeneity Inclusion and Mobility Adaptation through Locator ID Separation) architecture. This architecture natively enables communication between IPv4 and IPv6, mobility across these protocols, and multihoming with them. It also helps in reducing the impact of the changes in edge network topology on the core network routing functions, thus maintaining routing scalability. He has published his research work through more than 50 research papers in journals, magazines and conferences.

He is also involved in standardizing his research outcome in International Telecommunications Union (ITU). He has edited four ITU-T Recommendations related with the Next Generation Network (NGN) and future networks and submitted several contributions to these and other Recommendations. He is regularly participating in the ITU-T Study Group 13 meetings held in Geneva or other places. He also participates in the meetings of the IETF (Internet Engineering Task Force), the standardization body for Internet protocols.

To update his knowledge with the current research and development in the areas of his expertise, he has been participating in several professional associations (such as IEEE, IEICE, and Internet Society), editorial boards of famous journals and technical program committees for several international conferences. Details of his involvement in the professional activies can be found in his profile page.