在该算法下，网络节点按照群组移动性进行分簇，在位置更新中利用簇中心的移动来预测各个节点的位置。
In this algorithm, nodes are divided into clusters according to their group mobility. Location is updated by prediction of each node with the aid of the motion of their cluster center.
针对普适环境中节点随时加入和退出群组的特点，设计了组密钥更新协议，保证了组密钥的前向和后向安全性。
Concerning nodes' free joining and leaving the group, group key renewing protocol was proposed, which could guarantee the forward security and backward security of the group key.
此外，赋予被撤销节点新的秘密信息，使其能够重新加入群组参与会话。
New private information was distributed to revoked nodes so as to rejoin group in later sessions.
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