The City Moves Multimedia Broadcasts The (CMMB) Network Entire Cover The Realization

As information technology and communications industries, as a new handheld digital television multimedia services become the focus of attention. CMMB handheld TV technology for mobile phones and other mobile multimedia devices to provide digital television broadcasting services, television programs to meet user demand for mobile reception.CMMB is China's own R & D, with completely independent intellectual property rights of mobile multimedia broadcasting standards. CMMB signals via satellite and terrestrial radio broadcasts, the signal coverage to meet people in the small screen, small size, portable hand-held type terminals such as mobile phones, PDA, MP3, MP4, digital cameras, notebook computers and car, boat set anywhere on portable mobile devices to receive news, information, entertainment and TV needs.The State Administration of Radio Film and Television in 2008,37 major cities across the country completed the CMMB network construction.CMMB network coverage system, communication system, including basic software and hardware, hardware design, including launch systems, transmission networks, distribution systems, monitoring systems, a combination of multiple independent systems, software including the channel transfer instructions, CA encryption system commands, source codecs and other aspects of transmission and control systems, more complex, including network systems, application software, users and other business support systems, in addition to covering the actual effect of the test part; coverage theoretically complete, testing is also necessary The test is the effect of the guarantee, the coverage only after the actual test results is the science system can be run only after the test coverage improvement projects to better optimize the existing network. Thus, CMMB network coverage and scope of work more professional, this paper combined with the city network coverage of the actual work, and with reference to brothers in the city's successful experience, study the feasibility of its network coverage, the system of basic knowledge, basic structure, introduced them to use key technologies and to complete the function, use the framework of a large number of actual coverage map shows the network coverage and optimization methods. CMMB network coverage solution provinces are not the same, but the basic design ideas and methods are the same, the purpose of this paper is to study the foundation, providing reference for, and can not complete and face mask.