Modeling PCS networks under general call holding time and cell residence time distributions
IEEE/ACM Transactions on Networking (TON)
On performance analysis of challenge/response based authentication in wireless networks
Computer Networks and ISDN Systems
The 3G IP Multimedia Subsystem (IMS): Merging the Internet and the Cellular Worlds, Second Edition
The 3G IP Multimedia Subsystem (IMS): Merging the Internet and the Cellular Worlds, Second Edition
Analysis of handoff in a location-aware vertical multi-access network
Computer Networks: The International Journal of Computer and Telecommunications Networking - Wireless IP through integration of wireless LAN and cellular networks
Characterization by measurement of a CDMA 1x EVDO network
WICON '06 Proceedings of the 2nd annual international workshop on Wireless internet
Performance Analysis of Handoff Techniques Based on Mobile IP, TCP-Migrate, and SIP
IEEE Transactions on Mobile Computing
Modeling Credit Reservation Procedure for UMTS Online Charging System
IEEE Transactions on Wireless Communications
Charging in the IP Multimedia Subsystem: A Tutorial
IEEE Communications Magazine
Cluster-based AAA architecture for wireless sensor and WiMax networks
Proceedings of the 6th International Conference on Ubiquitous Information Management and Communication
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Authentication, Authorization, and Accounting (AAA) systems are one of the most significant architectural components of the current cellular networks and within the emerging IP Multimedia Subsystem (IMS) standard. Despite the operators' experience in AAA operations, very little is fundamentally known about the expected signaling rate towards the AAA system. In this paper, using stochastic and renewal theoretic techniques, we develop the first analytical model for the AAA signaling rate as a function of protocol parameters, users' access rates, session durations, and mobility. We provide model approximations and evaluate their accuracy under various operational conditions. Our results show that the AAA signaling rate is a monotonic non-linear function of the mobility rate and asymptotically converges to the AAA signaling rate in fixed networks. We also show that by adjusting the accounting interim and the authorization-lifetime intervals from half to full mean session duration, it is possible to define an AAA operational range for accounting messages that minimizes the signaling rate fluctuations due to likely perturbations in session and mobility statistics. The results also include the effect of the session dropping during handoffs and shows that is marginal in operational networks.