| 主权项 |
1. A method of controlling, by a control server, a first terminal, which is currently performing a session including one or more of media among audio, video, and text media, with a remote end to share one or more of media within the session with a second terminal, the method comprising:
receiving, by the control server, a media sharing request message for requesting sharing one or more media within the session with the remote end between the first terminal and the second terminal, from the first terminal or the second terminal, the media sharing request message including:
a first indication indicating which terminal is a playback control master with respect to the media requested to be shared; anda second dication indicating whether or not an extra connection is required for playback control with respect to the media requested to be shared; requesting, by the control server, a resource allocation from a media server handling media sharing; checking, by the control server, whether or not there is information regarding whether or not the remote end can provide a playback control function with respect to the media requested to be shared; and transmitting, by the control server, a session change request message to the remote end such that the session goes through the media server, the session change request message including an inquiry indicator for inquiring as to whether or not the remote end can provide the playback control function with respect to the media requested to be shared when the information does not exist, the inquiry indicator being included in a Session Initiation Protocol (SIP) header or a Session Description Protocol (SDP) message; receiving, by the control server, a session change response message from the remote end, information whether or not the remote end can provide the playback control function with respect to the media requested to be shared being provided to the control server through the session change response message when the session change request message includes the inquiry indicator; receiving, by the control server, a media playback control request message by the first terminal or the second terminal, the media playback control request message including a third indication indicating who is a master handling playback control of the media requested for playback control; when the first terminal or the second terminal, which has transmitted the received media playback control request message, is not a master handling the playback control, transferring the media playback control request message to a terminal corresponding to the master; receiving an acceptance message with respect to the media playback control request message from the corresponding terminal; checking, by the control server, whether or not the remote end can provide the playback control function with respect to the shared media; and when the remote end cannot perform the playback control function, requesting an entity that controls the media server to control playback with respect to the shared media such that the shared media can be controlled according to the request, wherein all operations are performed based on an IP Multimedia Subsystem (IMS) network, wherein the session is a collaborative session that is a logical set of an IMS session over the first terminal or the second terminal, which is anchored on a Service Centralization and Continuity Application Server (SCC AS) to be combined into a single IMS session, wherein the control server is the SCC AS that is an application server supporting multimedia session continuity, wherein the playback control function is provided with respect to a multicast media stream, wherein a buffering function is provided to a counterpart node of the media with respect to the first terminal or the second terminal, to perform the playback control function, and wherein the buffering function is further provided to a node that plays a role with respect to the counterpart node of the media, to perform the playback control function. |
