A method is disclosed which sets a PoC Box service and transmits information on a service
identifier by using a standard SIP, a SDP, an XCAP, and a PAP, in order to remain …

Accordingly, the present invention has been made to solve the above-mentioned problems
occurring in the prior art, and an object of the present invention is to provide a system …

Provided are a system for establishing and managing a Push To Talk (PTT) over Cellular
(PoC) session between PoC clients supporting various media types, a method thereof, and a …

Provided is a method and system for granting the floor in a PoC network, in which, when a
PoC server makes a request to establish a PoC Session according to preset information of a …

Disclosed is a method and system for initiating a Push-To-Talk over Cellular (PoC) session
between PoC clients supporting various types of media. A PoC client performing Open …

(57) ABSTRACT A method for performing session merging between PoC Ses sions under
the environment of multiple PoC sessions is pro vided. A merging PoC client sends a …

(57) ABSTRACT A method, user equipment and system provide simultaneous Push-To-Talk
(PTT) over Cellular (PoC) multimedia ser vices. After a PoC client participates in multiple …

Disclosed is a method and system for transferring and apply ing a floor control scheme when
a Push-To-Talk (PTT) over Cellular (PoC) session is established between PoC clients …

(57) ABSTRACT A method and system for guaranteeing a seamless session when replacing
a PoC terminal in a PoC system is provided, in which a currently busy PoC client can be …

Disclosed are a method and a system in which a client intend ing to participate in a chat
Push-to-talk over Cellular (PoC) group, presents a session participation-invitation …