Mobility management for VoIP service: Mobile IP vs. SIP

  • Authors:
  • T. T. Kwon;M. Gerla;S. Das

  • Affiliations:
  • California Univ., Los Angeles, CA, USA;-;-

  • Venue:
  • IEEE Wireless Communications
  • Year:
  • 2002

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Abstract

Wireless Internet access has gained significant attention as wireless/mobile communications and networking become widespread. The voice over IP service is likely to play a key role in the convergence of IP-based Internet and mobile cellular networks. We explore different mobility management schemes from the perspective of VoIP services, with a focus on Mobile IP and session initiation protocol. After illustrating the signaling message flows in these two protocols for diverse cases of mobility management, we propose a shadow registration concept to reduce the interdomain handoff (macro-mobility) delay in the VoIP service in mobile environments. We also analytically compute and compare the delay and disruption time for exchanging signaling messages associated with the Mobile IP and SIP-based solutions.