Transmission method, distribution method and transmission system for authentication management information

Abstract

The invention provides a transmission method of entitle management messages, comprising steps that: the network side distributes subscriber numbers to the terminals receiving the entitle management messages EMM one to one, sends the total number and the length information of the EMM to the terminals; the network side carries the SN of a corresponding terminal in each EMM, plays the EMM in turn according to a SN arrangement order consulted with the terminal; the terminal positions and receives a corresponding EMM according to the SN of the terminal, the total number and the length information of the EMM. The invention further provides a sending system of entitle management messages, for improving the positioning information for EMM, via which the terminals can position and receive corresponding EMM according to the positioning information, to reduce the receiving and analysis of the terminals on irrelative EMM, save terminal resource and reduce the power consumption of the terminals.

Description

technical field [0001] The invention belongs to the technical field of mobile multimedia broadcasting, and in particular relates to a method and system for distributing authorization management information of a conditional access system. Background technique [0002] In recent years, the development of mobile multimedia broadcasting technology has made the establishment of professional channels and diversified charging methods an important aspect of mobile multimedia broadcasting technology. To establish charging channels, the key technology is to have the support of encryption technology. Through information encryption technology, the legitimate rights and interests of viewers and the interests of operators can be protected from a technical point of view. [0003] Conditional Access (CA) is the core technical guarantee of encryption control of mobile multimedia broadcasting technology. users cannot use this service. [0004] The conditional access system itself is a compr...

AI Technical Summary

Problems solved by technology

Of course, the conditional access system authorization management center will send EMMs in a group-like manner to reduce data traffic, but for terminals, obtaining EMMs from data broadcasts consumes too much resources, and users can only passively receive all EMM data Broadcast until an EMM encrypted with the user's user key is received

[0010] This approach increases the processing burden of the terminal, greatly wastes terminal resources, increases the amount of network data, and it is unknown whether all terminals can reliably obtain EMM, which is not conducive to the promotion of conditional access systems.

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