A. Jedidi
ABSTRACT
Fourth generation networks result from the cooperation between different existing networks, thus taking benefit from their complementary properties. In this context, recent researches have addressed Digital Video Broadcast (DVB) networks, which benefit of very high broadcast capacities, but are unidirectionnal. Coupling a DVB network with a bidirectional network brings bidirectionality and service interactivity.
In this context, we focus on a DVB-SH (satellite services for hand-held devices) network, which is a hybrid (satellite/terrestrial) standard. We couple DVB-SH with a 3G cellular network, thus providing bidirectionality. DVB-SH benefits from a very high bandwidth capacity that allows unidirectional IP-TV channels broadcast.
A residual bandwidth in the DVB-SH path may still be available because of the variable bit rates of served flows.
In a previous study [1], we focused on this small residual bandwidth and its potential utilization. Our idea was to use this architecture in order to provide interactive low cost services over DVB networks. We specified an efficient switching of IP services, coming from 3G networks, to the residual bandwidth of DVB networks.
In this paper, we extend DVB residual bandwidth thanks to some DVB channels reserved by the 3G provider and study the impact of this extension on the type and the quality of targeted services. This paper particularly highlights the scheduling algorithm of the 3G flows switched over DVB residual bandwidth. It also presents a user subscription prediction algorithm that aims to guarantee efficient switching while maintaining service continuity.
- A. Jedidi, M. Tlais, and F. Weis, "Coupling 3G with DVB networks for low cost services," International Conference on Engineering Management and Service Sciences, 2009.Google Scholar
- ETSI, "Digital video broadcasting (DVB); DVB specification for data broadcasting," European Standard EN 301 192, June 2004.Google Scholar
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- ETSI, "Digital video broadcasting (DVB); framing structure, channel coding and modulation for digital terrestrial television," European Standard EN 300 744, November 2004.Google Scholar
- ETSI, "Digital video broadcasting (DVB); transmission system for handheld terminals (DVB-H)," European Standard EN 302 304, November 2004.Google Scholar
- ETSI, "Digital video broadcasting (DVB); system specifications for satellite services to handheld devices (SH) below 3 GHZ," European Standard ETSI TS 102 585, 2008.Google Scholar
- J. Sesena, "Commonalities and peculiarities of DVB-S, DVB-C and DVB-SMATV systems (comm's and pec's of DVB systems)," International Broadcasting Convention, 1995.Google Scholar
- K. Schmidt, C. Gunter, and A. Rothermel, "Improving the mobility of DVB handheld devices with inter-carrier interference compensation," IEEE International Symposium on Consumer Electronics, 2004.Google Scholar
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- Conseil Superieur de L'audiovisuel, "Synthèse de la consultation sur le développement des services interactifs en télévision mobile personnelle."Google Scholar
- F. Leleu, "Techniques d'anticipation des acces à un service d'informations distribuees. application à un service de presse ecrite electronique," Ph.D. dissertation, Universite de Rennes I, 1997.Google Scholar
- DVB, "IP datacast over DVB-H: Electronic service guide (ESG)," DVB Document A099 Rev. 1, September 2008.Google Scholar
Index Terms
- Efficient switched services over a DVB-SH/3G network
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