A practical approach to SIP, qos and AAA integration

Authors:
Michael Stier;Emanuel Eick;Eckhart Koerner
Affiliations:
Institute for Software Engineering and Computer Networks, Faculty of Information Technology, University of Applied Sciences Mannheim, Mannheim, Germany;Institute for Software Engineering and Computer Networks, Faculty of Information Technology, University of Applied Sciences Mannheim, Mannheim, Germany;Institute for Software Engineering and Computer Networks, Faculty of Information Technology, University of Applied Sciences Mannheim, Mannheim, Germany
Venue:
NETWORKING'06 Proceedings of the 5th international IFIP-TC6 conference on Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; Mobile and Wireless Communications Systems
Year:
2006

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Abstract

In this paper, we present an overall architecture to integrate SIP-based session management with scalable QoS features and AAA functionality. The QoS features include a bandwidth reservation in the access network based on the Next Steps in Signaling (NSIS) architecture. Furthermore, we employ the DiffServ compliant Priority Promotion Scheme (PPS) which is a packet probing scheme to verify end-to-end premium bandwidth availability. To avoid misuse of the QoS features AAA functionality is added that binds the QoS usage with the specific SIP sessions. The AAA functionality is achieved by applying a combination of the widespread RADIUS protocol with the Common Open Policy Service (COPS). As a proof of concept our architecture has been implemented and performance tested. The strength of our approach is that it keeps away complexity from the carrier networks while providing QoS with access control in a scalable fashion.