Masashi Kaneko

Applying flexibility in scale-out-based web cloud to future telecommunication session control systems

In traditional telecommunication networks, server resources are statically allocated to session control systems based on demand forecasting. However, the open platform on which third party developers provide various applications has recently made demand prediction difficult. In addition, static allocation concerning load peak results in less resource utilization during nonpeak times, and is not capable of handling unexpected demand fluctuation. To enable flexible on-demand resource control in telecommunication systems that reduces costs, we propose applying a scale-out architecture, which is commonly used in Web systems for resource optimization, to high availability telecommunication systems. We implemented a scale-out-based session control server cluster and showed that the number of servers comprising the cluster can be dynamically configured without serious interruption in service. We also confirmed that the performance of the cluster linearly scales to the number of servers, which indicates the feasibility of the scale-out-based telecommunication system architecture.

SIP servlet dialogue handling for NGN Service Capability Interaction Manager

The Next-Generation Network (NGN) is currently under development. Supporting 3rd party SIP applications on NGNs is necessary in order to improve the services provided to NGN subscribers. We propose using certain function in order to fully open up NGN and allow 3rd party service providers to offer services running on SIP application servers. If the deployment objectives of our proposed functions are taken into consideration, it is necessary to focus on the Service Capability Interaction Manager (SCIM). We propose that the SLIM acts as a function point to coordinate application service runtime execution between SIP application servers provided by both 3rd party service providers and telcos.

Novel SIP session handling in a service delivery platform for telecom-web integration

This paper proposes a new call control API model that will be used in the next generation network (NGN) and can promote the provision of rich and advanced services. The NGNs main characteristics are its SIP based session control framework over the 3GPP IMS, and its open application network interfaces (ANIs) to facilitate the use of network functions for applications positioned outside the network. By using these published ANIs, third party service providers can develop SIP-session related service applications more easily and Web-coordinated service applications through the ldquomash uprdquo manner, which is one of the major concepts of Web 2.0.

Highly flexible media handling enabler for NGN service delivery platform

We propose a new media handling architecture that can be used to create or mash up diverse services in the next generation network (NGN). By clarifying problems with the current implementation situations, such as the use of Web service-based Parlay X application program interfaces (APIs), we explain the approaches to solving them. The proposed APIs have an appropriate granularity and flexibility, and the proposed platform architecture enables easy functional extension in a multi-vendor environment. In conjunction with SIP handling capabilities, our platform is expected to promote diversification of services in the NGN.