Mobile Multimedia Broadcasting based on Integrated Communication and Broadcast Networks
This paper provides a new paradigm to integrate the Chinese Digital Television/Terrestrial Multimedia Broadcasting (DTMB) systems with the existing mobile communication systems, which can support mobile multimedia broadcasting services with carrier-grade quality. By dividing the services into 4 categories: digital TV, video on demand, data on demand and Internet access, a complete design of the layered structure and the signaling protocols are presented. Speciﬁcally, a SubNetwork Data Unit (SNDU) layer and a modiﬁed hybrid ARQ (Automatic Repeat-reQuest) signaling protocol have been proposed. A testbed in Tsinghua University based on DTMB and WLAN/CDMA1x has been successfully implemented and the experimental results clearly show the effectiveness of the proposed signaling protocols.
With the development of mobile communications and multimedia technologies, the demand for interactive mobile multimedia services under high-speed mobile reception environment grows rapidly. Although the existing mobile communication networks are good for interactive services, it is not easy to support broadband multimedia applications at high mobility. On the other hand, digital broadcast networks can easily deliver broadband mobile multimedia services to mass users, but can not support interactive communications. The concept of integrated communication and broadcast networks (ICBN) has been proposed in , taking advantage of the best of the two heterogeneous networks to support interactive broadband mobile multimedia services. ICBN is particularly suitable for the asymmetric information dissemination to a large number of subscribers. This is due mainly to the nature of broadcast networks, such as high-volume, high-data-rate, highly reliable, and, most importantly, congestion-free. Recently, with the vast deployment of digital broadcast networks worldwide, much attention has been paid to ICBN and some prototype systems have been developed . But most of them focus on the architecture study only with little discussion on detailed protocol and signaling design.
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