CMMB数据广播前端发送平台研究

摘要

The methods of data transmission and package for data business broadcasting in CMMB system are stipulated in the data broasdcasting, the 5th part of China Mobile Multimedia Broadcasting(CMMB).The frant-end transmission platform of CMMB is researched and discussed based on the data broadcasting front-end network to satisfy the service feature and functional requirement of data brosdcasting.The platform primarily includes document generator and XPE package.The segmentation and transmission principles of data files and FAT files are analyzed.The integrality and accuracy of data transmission are discussed.The prospect and advantages of CMMB are given.%CMMB标准体系中<第5部分:数据广播>规定了CMMB系统中数据业务广播的数据传输和封装方法,为了满足数据广播的业务特征和功能需求,以数据广播前端网络为基础,研究并讨论了移动多媒体数据广播的前端发送平台,该平台主要包括文件发生器、业务数据的协议封装(即XPE封装)系统,分析了数据文件及FAT文件的分割和传输原理,讨论了数据传输过程中的可靠性和准确性,给出了CMMB的发展前景和优势.