Mobility

Experiments and Analysis of Voice Over Mobile IP

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Executive Summary

Supporting mobility in real-time applications such as Internet telephony is in demand as mobile Internet becomes prevalent. A simple solution is to use Mobile IP in order to provide transparent handoffs to upper layer applications. However, due in part to the Mobile IP's limitations such as triangular routing delay and encapsulation overhead, application-layer solutions for mobile Internet telephony has been developed by extending Session Initiation Protocol (SIP). This paper presents experimental results on Internet telephony based on Mobile IP and examines its feasibility by analyzing delay factors and increased network loads.

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