Research On Technologies Of 3G-based New-media Broadcast

Media and communication technologies have been merging closely with the rapid developing mobile-internet. More people are used to get information with their intelligent terminals from the mobile internet. Mobile-internet has become a new dissemination channel for traditional media information. The consensus of traditional radio industry is that 3G-based new-media broadcast, as a new communication medium, can break the AM/FM band limitation, receiving-terminal restrictions and space coverage constraints. Researches on the relevant technologies in editing, posting and receiving are made respectively and orderly hereby. The specifications include:(1) A massive-data near-line storage scheme meets the need for massive multimedia data storage. All the on-line, near-line and off-line data are stored in the unified general hard disks. The high-speed crossbar-switch can move the data quickly. The low-cost and scalable scheme makes the demand for bandwidth and time lower, when data passes between different disk.(2) Stream-media matrix scheme makes personalized radio possible. Without the number constraints on broadcast frequencies, each audience respectively receives the unique program which is converged and regrouped from similar traditional broadcast programs. The traditional media capabilities are incorporated into the new-media business processes to achieve fine-grained personalized narrowcasting.(3) The rapid recovery scheme for main Service-Call Session Control Function can quickly restore the service provided by failure S-CSCF component server. Heartbeat line deals with system fault. Distributed Third-party Registration Requests are used to backup registration information. The domain name maps to two IP addresses, so the backup S-CSCF server can quickly take over the failure main server.(4) Improved Extensible Messaging and Presence Protocol scheme help terminal save bandwidth and power. Security Architecture for XMPP consumes less power compared with Transport Layer Security. Stanza Interception and Filtering Technology minimized the collection of communication messages. Terminal endurance and customer experience are improved effectively.(5) The Back to Back User Agent component scheme merges the feedback information from traditional broadcast and new-media broadcast. User telephone service CLASS-5 features is integrated into the VoIP. The feedback hotline information injects into the new-media broadcast system transparently for audience. The scheme makes it possible to share the feedback information between traditional-media and new-media.(6) Stream-media server performance testing tool provides quantitative basis for system deployment. The simulation scene shows that many pseudo-terminal instances random access multiple addresses on RTSP stream-media server. In order to avoid the resource eshaustion of pseudo-terminal server, additional IP addresses and ports are used to receive RTP media stream. Pseudo-terminal server only focus on RTSP signal for the purpose of quantitative test.Laboratory tests and practical applications show that 3G-based new-media broadcast is feasible and effective. In addition to the work hereby, more study on new-media business process design and deep integration with IMS will improve the complicated project.