Patent ID: 8803942

Claim:
A session processing method, comprising: sending a cluster user participation command to a conference control centre by a wireless Access Terminal (AT) supporting wireless video, wherein the command comprises an identifier of a cluster user which is invited to participate in a video conference, and the AT has an administration authority of adding a user into the conference which is convinced; sending, by the conference control centre, an invitation to a cluster terminal corresponding to the identifier of the cluster user through a Push To Talk Dispatch Server (PDS); returning by the cluster terminal which receives the invitation an Acknowledgement (ACK) response to the PDS when the cluster terminal agrees to participate in the video conference, and establishing by the cluster terminal a link with the PDS; and performing session interaction between the AT and the cluster terminal based on the link; the method further comprising: returning by the cluster terminal which receives the invitation a Negative Acknowledgement (NACK) response to the PDS when the cluster terminal disagrees to participate in the video conference; forwarding by the PDS the NACK response to the conference control centre; and sending by the conference control centre the NACK response to the AT through the IP network, the PCN and the RAN in turn.