Martti Kuparinen

Handover performance with HIP and MIPv6

Mobility management in the current Internet is designed to work with mobile IPv4 and, when IPv6 is available, with mobile IPv6. These solutions are based on the current architecture in the Internet, where the IP address represents both the locator and the identifier of the node. In the IETF, identity and location information separation has raised a lot of discussion and new ideas have emerged to separate these. Host identity protocol is one candidate that can be used for this separation. It introduces also a new way of handling mobility management taking advantage on the mentioned identity and location separation.

Towards an innovation oriented IP multimedia subsystem [IP Multimedia Systems (IMS) Infrastructure and Services]

This article proposes an approach to IMS policy control based on session policies that achieve transparent end-to-end session establishments between IMS terminals. The article identifies drawbacks in the current IMS policy control methodology, discusses how these drawbacks may negatively influence the potential of IMS to provide innovative services, and describes how the new approach overcomes these drawbacks. Our proposal offers modularity and scalability properties that enable operators to establish policies and modify existing ones without major changes in the IMS core. Thus, policies can be applied transparently to SIP dialogs between terminals and modified on the fly without tearing down ongoing dialogs. The article also discusses a test bed implementation that worked as a proof-of-concept