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Mobility Management for VoIP on Heterogeneous Networks: Evaluation of Adaptive Schemes

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4 Author(s)
Bernaschi, M. ; Ist. per le Applic. del Calcolo Mauro Picone (C.N.R.), Rome ; Cacace, F. ; Iannello, G. ; Vellucci, M.

The introduction of the IP multimedia subsystem on 3G cellular networks and the integration with other widely deployed wireless networks based on the IEEE 802.11 protocol family require support for both mobility and quality of service. When mobile systems move across heterogeneous networks, ongoing real-time sessions are affected not only by handoff delay but also by different packet delay and bit rate. In this paper, we propose a cross-layer mechanism that takes into account mobility at different layers of the network stack in order to yield better quality for VoIP, videoconferencing, and other real-time applications. We describe our cross-layer architecture, adaptation techniques, a prototype implementation, and experimental results.

Published in:

Mobile Computing, IEEE Transactions on  (Volume:6 ,  Issue: 9 )

Date of Publication:

Sept. 2007

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