Design considerations of a novel media streaming architecture for heterogeneous access environment
BWAN '06 Proceedings of the 2006 workshop on Broadband wireless access for ubiquitous networking
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IMSA'07 IASTED European Conference on Proceedings of the IASTED European Conference: internet and multimedia systems and applications
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MobiMedia '06 Proceedings of the 2nd international conference on Mobile multimedia communications
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Computer Communications
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Advances in Multimedia
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Proceedings of the 7th International Conference on Mobile and Ubiquitous Multimedia
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IEEE Transactions on Wireless Communications
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EurolMSA '07 Proceedings of the Third IASTED European Conference on Internet and Multimedia Systems and Applications
CCNC'09 Proceedings of the 6th IEEE Conference on Consumer Communications and Networking Conference
ANSWER: Adaptive network selection in WLAN/UMTS environment
EUC'07 Proceedings of the 2007 conference on Emerging direction in embedded and ubiquitous computing
Computer Networks: The International Journal of Computer and Telecommunications Networking
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This article addresses several challenges related to the evolution toward seamless interworking of wireless LAN and 3G cellular networks. The main objective is to evaluate the conditions and restrictions under which seamless continuity of video sessions across the two networks is feasible. For this purpose, we formulate a number of practical interworking scenarios, where UMTS subscribers with ongoing real-time video sessions hand over to WLAN, and we study the feasibility of seamless continuity by means of simulation. We particularly quantify the maximum number of UMTS subscribers that can be admitted to the WLAN, subject to maintaining the same level of UMTS QoS and respecting the WLAN policies. Our results indicate that the WLAN can support seamless continuity of video sessions for only a limited number of UMTS subscribers, which depends on the applied WLAN policy, access parameters, and QoS requirements. In addition to this study, we do address several other issues that are equally important to seamless session continuity, such as the QoS discrepancies across UMTS and WLAN, the vertical handover details, and various means of access control and differentiation between regular WLAN data users and UMTS subscribers. The framework for discussing these issues is created by considering a practical UMTS/WLAN interworking architecture.