Analysis of Session Establishment Signaling Delay in IP Multimedia Subsystem

  • Melvi Ulvan
  • Robert Bestak
Conference paper
Part of the IFIP Advances in Information and Communication Technology book series (IFIPAICT, volume 308)


This paper investigates and analyzes SIP delay in the session establishment signaling procedure in the IMS system. We investigate the delay for end-to-end link scenarios such as WiMAX-to-WiMAX, UMTS-to-UMTS, UMTS-to-WiMAX and vice versa. The analyses consider three types of delays: transmission delay, processing delay and queuing delay. The obtained results show that the main delay of session establishment signaling process is due to the processing delay. In addition, the lower channel rate in the UMTS network as well as IMS service rate has significant impact to the session establishment signaling delay.


Wireless networks IMS SIP messages Session delay 


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Copyright information

© IFIP International Federation for Information Processing 2009

Authors and Affiliations

  • Melvi Ulvan
    • 1
  • Robert Bestak
    • 1
  1. 1.Czech Technical University in PraguePrague 6Czech Republic

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