摘要
在理论分析用户接收组密钥平均等待时间的基础上,提出了按价值贡献度和重要性对用户区分优先级,并对不同优先级用户的组密钥采用不同分发频率的方案,然后对各种具体分发规则进行了性能分析。结果表明,采用优化的组密钥分发方案,在对系统整体性能影响不大的情况下,可以为高优先级的用户提供更高品质的服务。
At first, the paper analyzed in theory the average waiting time of receiving group key by old scheme. Then we proposed a scheme of prioritizing subscribers and distributing each priority keys by various frequencies. After introducing various regulations, the paper found out the optimized distribution scbeme. The result indicates that subscribers with high priority could receive better service without deteriorating the system performance obviously.
出处
《电视技术》
北大核心
2005年第12期7-9,21,共4页
Video Engineering
基金
广东省科技攻关项目2003B12224支持
关键词
数字电视
条件接收系统
密钥分发
等待授权时间
优先级
digital TV
conditional access system
keys distribution
waiting authorization time
priority
