Mobile multimedia service implementing method and condition receiving system

Abstract

The present invention provides a mobile multimedia service implementation method and a conditional access system. The present invention adds a time-varying key TBEK to the authorized encryption layer on the basis of the existing four-layer encryption structure, and utilizes the time-varying key TBEK to encrypt program streams. The encryption key is encrypted, and the transmission process of the time-varying key TBEK is combined with the mobile communication system, which provides a new way for the conditional access system to realize mobile multimedia services, so that the conditional access system can be based on the time-varying key The time-varying period of TBEK realizes the real-time billing function of mobile multimedia services, and the time-varying period of the time-varying key TBEK of the present invention can be flexibly set according to the accuracy of billing; the present invention does not change the existing mobile multimedia service implementation method, It only provides an achievable way for the receiving end to watch mobile multimedia programs in occasional, impromptu and other situations; thereby achieving the purpose of improving the flexibility of implementing mobile multimedia services.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a conditional access-based mobile multimedia service implementation method and a conditional access system. Background technique [0002] The development of cellular mobile communication has greatly improved the mobility of people's living space, thus giving birth to an increasing number of mobile phone users. With the development of digital multimedia technology, people can no longer be satisfied with the situation that mobile terminals can only make calls, send text messages, and simply surf the Internet. The demand for audio-visual multimedia information is becoming stronger and stronger. People hope that they can watch or listen to news, various information, songs, video programs, etc. through handheld terminals at any place and any time. 3G is an option, but the 3G network does not completely solve the bandwidth problem, the number of users that 3G can carry i...

AI Technical Summary

Problems solved by technology

3G is an option, but the 3G network does not completely solve the bandwidth problem, the number of users that 3G can carry is limited, and the charges are expensive

[0028] It can be seen from the above description that the existing digital multimedia broadcasting CA system can provide ideal security performance, and can achieve the purpose of differentiated charging by controlling SK and PDK. However, the means of such differentiated charging are limited. Yes, operators generally can only provide billing methods such as monthly subscription billing, billing by channel, billing by program, etc., and cannot provide real-time billing

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