A Method for Implementing Multimedia Broadcast Multicast Service Key Distribution

摘要

A Method for Implementing Multimedia Broadcast Multicast Service Key Distribution. The method comprises: the network side locates a time interval T for each group users, and informs to the corresponding user terminal; the network side distributes the new key valid message after updating the shared key, and the user terminals which have received the new key valid message initiates a timer corresponding to the time interval T; the user terminals send a request key message to the broadcast/multicast server when the timer reaches the point; the broadcast/multicast server distributes the new shared key to the user terminals which have sent request after receiving the request key message. The present method ena~es the different user to send a request at different time point, which solves the network communication blocking problem brought by a large number of user terminals appling the new shared key to the network at the same time.