Mitsuaki Kakemizu

Global PNNI internetworking architecture for ATM public networks

The number of ATM-LANs based on the private network node interface (PNNI) has been increasing since the PNNI specification was standardized at the ATM Forum. Evolution of the Internet will lead to a great demand for global PNNI internetworking architecture that can seamlessly interconnect remote ATM-LANs via several public networks based on broadband ISDN user part (BISUP). This paper discusses a peer group configuration method for such an internetworking architecture that can avoid an overload of the PNNI routing processing in each peer group. The paper also proposes a method for seamless interconnection of remote ATM-LANs. In this method, complete PNNI signalling and routing is executed between a local switch (LS) in a public network and each ATM-LAN. It also can reduce the PNNI routing processing load on each public network by emulating PNNI routing and signalling between LSs.

A Method for Generating Context-Aware Services

There is a need for a context-aware service control platform that dynamically generates proper service execution methods according to the various contexts, instead of developing a variety of service control programs for every context. A method for generating service execution methods by interpreting the context is proposed. This method combines context interpretation information with the context based on the service definition. Semantic constraints, which are introduced as a part of the service definition, generate appropriate service execution methods by specifying how to use the context, and they also improve the processing performance

PNNI internetworking architecture over ATM public networks

An increase in high quality of service (QoS) applications such as video conferencing and distribution, and the evolution of the Internet have popularized ATM-LAN use based on the private network node interface (PNNI). Also in public networks, which serve as backbone networks for LANs, ATM technology is being introduced for high-speed and broadband communication. These situations lead to a great demand for economically and seamlessly interconnecting remote ATM-LANs via ATM public networks, which are based on the broadband ISDN user part (BISUP). This paper discusses a peer group configuration method for such an internetworking architecture that can avoid an overload of the PNNI routing processing in each peer group. The paper also proposes a method for seamless interconnection of remote ATM-LANs. In this method, complete PNNI signalling and routing is executed between a local switch (LS) in a public network and each ATM-LAN. It can also reduce the PNNI routing processing load on each public network by emulating PNNI routing and signalling between LSs.