中文

Journal of Applied Sciences ›› 2012, Vol. 30 ›› Issue (3): 239-244.doi: 10.3969/j.issn.0255-8297.2012.03.004

• Communication Engineering • Previous Articles     Next Articles

Modeling and Analysis of Survivability of IP Multimedia Subsystem Based on SPN

ZHAO Ming-feng1;2, ZHOU Ya-jian2, REN Dong-xiao1, YANG Yi-xian1;2   

  1. 1. School of Computer Science & Engineering, University of Electronic Science and Technology of China,
    Chengdu 610054, China
    2. National Engineering Laboratory for Disaster Backup and Recovery,
    Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2010-07-01 Revised:2011-03-29 Online:2012-05-30 Published:2012-05-30

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Abstract:

As one of network and business integration standard, IP multimedia subsystem (IMS) plays an important role in network convergence. It is important to analyze the authentication and registration process, and build a survivability model for IMS. Having defined survivability and its attributes, this paper proposes a survivability stochastic Petri net (SPN) model and its simplified version, and analyzes the survivability attributes including reliability, maintainability and availability. Simulation results show that the measures of survivability vary with time, failure rate and repair rate, respectively. Reliability is reduced with the increase of time and failure rate, and maintainability enhanced with the increase of time and repair rate. This study
provides useful clue for improving survivability of IMS systems.

Key words: stochastic Petri net, IP multimedia subsystem, survivability

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