基于3G的新媒体广播技术研究

发布时间：2018-05-28 05:24

本文选题：3G + 新媒体　；参考：《东北大学》2014年博士论文

【摘要】：移动互联网快速发展和普及,传媒业和通信业结合更加紧密。人们已经习惯通过智能终端获取各种信息,这为传统媒体提供了新的信息发布渠道。传统广播电台借助全新的移动互联网传播媒介,可以打破AM/FM频段限制、接收终端限制、覆盖空间限制和信息单向传播限制,大力发展基于3G的新媒体广播已经成为业界共识。本文按新媒体广播业务流程的顺序,分别对编辑、播出和收听环节的相关技术进行了研究,具体内容包括以下几个方面：(1)针对编辑环节的数据存储问题,提出了海量数据近线存储方案。在线、近线、离线数据都采用普通硬盘作为存储介质,通过高速交叉开关实现数据迅速移动,突破了不同介质间传递数据的带宽限制,降低了时间成本,是一种低成本的具有无限扩展能力的数据存储方案。(2)针对播出环节的个性化播出问题,提出了流媒体矩阵的设计方案。流媒体矩阵将传统广播的同类节目汇聚后重新组合,为每一个听众定义一路输出,突破了传统广播频率资源不足的限制,将传统广播的编播能力纳入到新媒体业务流程中,实现细粒度的个性化窄播。(3)针对播出环节主服务-会话控制功能(S-CSCF)组件服务器失效后无法迅速恢复服务的问题,提出了S-CSCF的迅速恢复方案。采用心跳线检测系统级故障,采用第三方注册请求方式实现用户注册信息备份,将备份压力平均分布。采用同一个域名对应两个IP地址方式实现故障时切换,保证当主服务器失效时,备份S-CSCF组件服务器迅速接管服务。(4)针对收听环节中智能收听终端能耗和带宽过高的问题,提出了可扩展信息和出席协议(XMPP)的改进方案。改进的XMPP协议将高能耗的传输层安全机制分离出来,代之以安全体系结构达到降低功耗、提高终端续航能力目的。采用节拦截和过滤技术协商最小通讯消息集合,节省了带宽,改善了用户体验。(5)针对收听环节中新、旧两种媒体反馈信息融合的问题,提出了背靠背用户代理(SIP-B2BUA)组件方案。利用SIP-B2BUA组件将用户电话服务CLASS-5的特性融入VoIP系统,透明地将传统热线电话的反馈信息融入到新媒体广播系统,实现了新、旧两种广播系统反馈信息的共享。(6)针对测试工具缺乏问题,提出了RTSP流媒体服务器性能测试方案。多个伪终端实例随机访问流媒体服务器上的多个RTSP地址,模拟现实的使用过程。为避免伪终端服务器的资源被耗尽,另外约定IP地址和端口接收RTP媒体流,伪终端服务器只处理并发的RTSP信令,达到定量测试的目的。对上述研究成果进行了实验测试和实际应用,测试数据和使用效果表明,基于3G的新媒体广播系统有效可行。3G新媒体广播是一项复杂的系统工程,除了本文所做工作外,在新媒体业务流程设计、与IMS系统深度融合等方面还有待进一步改进和完善。
[Abstract]:With the rapid development and popularization of mobile Internet, the media industry and communication industry are combining more closely. People have been used to obtaining various information through intelligent terminals. This provides a new channel for information dissemination for traditional media. The traditional radio stations can use the new mobile Internet communication media to break the limits of AM/FM frequency bands and receive terminal restrictions. The development of new media broadcasting based on 3G has become an industry consensus. This paper, according to the order of the new media broadcasting business process, studies the related technologies of editing, broadcasting and listening. The specific contents include the following aspects: (1) the data storage of the editing link is asked. On the line, the line, the offline data and the off-line data are used as the storage medium, and the data can be moved quickly through the high speed cross switch, which breaks through the bandwidth limitation and reduces the time cost between different media. It is a low cost data storage scheme with unlimited expansion ability. (2) in view of the personalized broadcasting problem of the broadcast link, a design scheme of the streaming media matrix is proposed. The streaming media matrix recombines the traditional broadcast of the same program, defines the output for each audience, breaks through the limitation of the shortage of traditional broadcasting frequency resources, and integrates the traditional broadcasting capability into the new media business flow. In the process, the fine-grained personalized sowing is realized. (3) in view of the problem that the main service session control function (S-CSCF) server of the broadcast link can not recover the service quickly after the failure of the component server, a quick recovery scheme of S-CSCF is proposed. The system level fault of the heartbeat line is detected and the user registration information backup is realized by using the third party registration request. The average distribution of backup pressure is distributed. When the same domain name corresponds to two IP addresses, a fault switch is realized. When the main server fails, the backup S-CSCF component server takes over the service quickly. (4) the improvement of the energy consumption and the high bandwidth of the intelligent listening terminal in the hearing link is proposed, and the improvement of the extensible information and the attendance protocol (XMPP) is proposed. The improved XMPP protocol separates the high energy transport layer security mechanism, replacing it with the security architecture to reduce the power consumption and improve the terminal endurance. Using the node interception and filtering technology to negotiate the minimum communication message set, save the bandwidth and improve the user's test. (5) the new and old two kinds of media are counter to the hearing link. The back-to-back user agent (SIP-B2BUA) component scheme is proposed. Using the SIP-B2BUA component, the characteristics of the user telephone service CLASS-5 are integrated into the VoIP system, and the feedback information of the traditional hotline telephone is transparently integrated into the new media broadcasting system, and the feedback information of the new and old two broadcasting systems is shared. (6) The test tool is lacking, and the performance test scheme of RTSP streaming media server is proposed. Multiple pseudo terminal instances randomly access multiple RTSP addresses on the streaming media server, simulate the use process of the reality. In order to avoid the resource of the pseudo terminal server being exhausted, the IP address and port receive the RTP media stream, and the pseudo terminal server only handles and deals with it. RTSP signaling to achieve the purpose of quantitative testing. Experimental testing and practical application of the above research results, test data and application results show that the effective and feasible new media broadcasting system based on 3G based new media broadcasting system is a complex system engineering. In addition to the work done in this paper, the new media business process design, and the IMS system are designed. The depth of integration and other aspects need further improvement and improvement.
【学位授予单位】：东北大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TN931;TN929.53

【参考文献】