Architecture and testbed implementation of vertical handovers based on SIP session border controllers |
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Authors: | Stefano Salsano Luca Veltri Andrea Polidoro Alessandro Ordine |
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Affiliation: | (1) Department of Electronic Engineering, University of Rome, “Tor Vergata” Via del Politecnico 1, 00133 Rome, Italy;(2) Department of Information Engineering, University of Parma, Parma, Italy |
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Abstract: | This paper describes a Session Initiation Protocol (SIP) based solution for mobility management that provides seamless mobile
multimedia services in a heterogeneous scenario where different radio access technologies are used (802.11/ WiFi, Bluetooth,
2.5G/3G networks). The solution relies on the so called “Session Border Controllers” which are now widely used in many commercial
SIP telephony solutions, mainly to deal with NAT traversal. Session Border Controller functionality has been extended to support
seamless mobility for multimedia applications. A prototype of the proposed solution focused on VoIP services has been implemented
in a test bed which is able to perform seamless handovers (and NAT traversal) using the 802.11, Bluetooth and 3G (UMTS) access
networks. Measurements results are reported which analyze the performance of the solution in a real world environment, using
commercial WiFi and 3G services. |
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Keywords: | Seamless handover-SIP Application layer mobility Session Border Controller WiFi 3G networks |
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