@inproceedings{dcf231ba5713422096669607a61aa447,
title = "End-to-End Availability Analysis of IMS-Based Networks: Simplex and Redundant System",
abstract = "Various methods and models have recently been proposed and applied for evaluating IP Multimedia Subsystem (IMS) in terms of reliability, availability and performance. End-to-end availability is one of the key factors that can improve the quality of service (QoS) and increase the reliability of Next Generation Networks (NGNs). In this paper, an end-to-end availability model is proposed and evaluated using a combination of Reliability Block Diagrams (RBD) and a proposed five-state Markov model. The overall availability for intra- and inter domain communication in IMS is analyzed, and the state-of-the-art models are compared with the proposed novel Markov-based reliability modeling for both simplex and redundant systems. The proposed model is proved to efficiently represent the system behaviors. The effect of the end-to-end availability model when applying redundancy in the IMS core system is investigated and numerical results are included.",
keywords = "end-to-end availability, Reliability : System reliability, IP Multimedia Subsystems (IMS), Redundancy, Reliability Block Diagram (RBD), Continuous Time Markov Chain (CTMC)",
author = "Chayapol Kamyod and Nielsen, {Rasmus Hjorth} and Prasad, {Neeli R.} and Ramjee Prasad",
year = "2013",
month = apr,
day = "7",
doi = "10.1109/WCNC.2013.6554718",
language = "English",
isbn = "978-1-4673-5938-2 ",
series = "I E E E Wireless Communications and Networking Conference. Proceedings",
publisher = "IEEE",
pages = "1103 -- 1108 ",
booktitle = "Wireless Communications and Networking Conference (WCNC), 2013 IEEE",
address = "United States",
note = "2013 IEEE Wireless Communications and Networking Conference (WCNC) ; Conference date: 07-04-2013 Through 10-04-2013",
}