本文提出的策略是一种融合分布式与集中式两种控制机制的一种混合策略。
The proposed strategy is a hybrid scheme, that is, a combination strategy of the centralized and distributed control strategies.
该文提出了一种多重组的访问控制方案，该方案使用集中式与分布协同式相结合的密钥更新算法实现了多权限的控制。
This paper presents a multi-group access control scheme that achieves multi-privileged access by combining the centralized and distributed key management scheme.
该文通过对各种会议拓扑结构的分析和比较，提出了一种以SIP作为控制信令的、集中式拓扑结构的多媒体会议系统。
After analysis and comparisons of various conference topologies, a centralized multimedia conference system using SIP as controlling signaling is pro-posed in this article.
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