System and method to keep continuity of media flows for a collaborative session without constant controller(s) involvement

摘要

A system of managing collaborative session control when controller is lost or changes to passive-control mode in a data communication network comprising of a control-capable terminal device that can generate and send user preferences on successive controller selection and control policy, a master server device that can make control transfer decisions or take over control upon events, a normal terminal device that can process and response to master server queries on control capacity and its willingness to take over control. These apparatus are connected to each other inside one collaborative session, regardless of their subscriptions. A method of control management of the collaborative session without constant enrollment of controller comprises the steps of sending different types of preferences to master server device; making control transfer or handover decision; and interacting with affected terminals.

主权项

1. A method for a system including an application server and UEs comprising:
transmitting, from a controller UE which controls a collaborative session among the application server and the UEs including the controller UE, preference rules to be used in a special case where at least one of the controller UE is lost from the collaborative session and a mode of the controller UE is changed to a passive control mode; selecting, in the special case, a single candidate of successor apparatus from among candidates of successor apparatus based on the preference rules; requesting, the single candidate of the successor apparatus to take over a control of the collaborative session; and requesting, when the single candidate of the successor apparatus rejects to take over the control of the collaborative session, another single candidate of the successor apparatus, selected from among the candidates of the successor apparatus based on the preference rules, to take over the control of the collaborative session, wherein: the preference rules contain, at least, information indicating candidates of the successor apparatus.