Abstract: The present invention relates to a method for obtaining group information by an invited user in a Push-to-Talk over Cellular (PoC) session. The method comprises: sending, by a PoC client where a user initiating the session is located, a session request message carrying information about the user initiating the session and the session group member information to a PoC server; and sending, by the PoC server, the session request message carrying the information about the user initiating the session to a PoC client where the invited user is located. The PoC server sends session group member information to the PoC client where the invited user is located, so that the invited user is able to know the session group member, or refer to the session group member information to determine subsequent operations. The present invention has also disclosed a PoC system.

Abstract: The present invention discloses a method and an apparatus for controlling user's participation into a session so that the system can control accession to a PoC session requested by anonymous users and restrict an expelled user from joining the session again. Under the present invention, a client in the PoC session sends a request of expelling a user to the control server, with the SSRC identifier or nickname of the user or an anonymous user wildcard carried in the request; according to the received SSRC identifier, nickname or anonymous user wildcard, the control server searches for the corresponding PoC address, and expels the user out of the session as required according to the PoC address. Therefore, the client with the expulsion right can control accession to the PoC session requested by other users, especially anonymous users, thus keeping order of the session.

Abstract: A method of providing a voice mailbox function in a PoC service, including: if the voice mailbox of at least one called user is to be connected in response to receiving a session establishment request from a calling user, determining whether the session corresponding to the session establishment request is a one-to-many session; and recording a message from the calling user through the voice mailbox if the session is a one-to-many session. The invention further discloses a method in a PoC service of notifying of a message in a voice mailbox, and a PoC service server.

Abstract: The present invention discloses a method and an apparatus for controlling user's participation into a session so that the system can control accession to a PoC session requested by anonymous users and restrict an expelled user from joining the session again. Under the present invention, a client in the PoC session sends a request of expelling a user to the control server, with the SSRC identifier or nickname of the user or an anonymous user wildcard carried in the request; according to the received SSRC identifier, nickname or anonymous user wildcard, the control server searches for the corresponding PoC address, and expels the user out of the session as required according to the PoC address. Therefore, the client with the expulsion right can control accession to the PoC session requested by other users, especially anonymous users, thus keeping order of the session.

Abstract: A method of providing a voice mailbox function in a PoC service, including: if the voice mailbox of at least one called user is to be connected in response to receiving a session establishment request from a calling user, determining whether the session corresponding to the session establishment request is a one-to-many session; and recording a message from the calling user through the voice mailbox if the session is a one-to-many session. The invention further discloses a method in a PoC service of notifying of a message in a voice mailbox, and a PoC service server.

Abstract: The present invention relates to a method for obtaining group information by an invited user in a Push-to-Talk over Cellular (PoC) session. The method comprises: sending, by a PoC client where a user initiating the session is located, a session request message carrying information about the user initiating the session and the session group member information to a PoC server; and sending, by the PoC server, the session request message carrying the information about the user initiating the session to a PoC client where the invited user is located. The PoC server sends session group member information to the PoC client where the invited user is located, so that the invited user is able to know the session group member, or refer to the session group member information to determine subsequent operations. The present invention has also disclosed a PoC system.

Abstract: A method for processing PoC service, comprising: PoC user terminal initiates a call to PoC media storage means to start the media storage means; then, establishing media stream path between the PoC server and PoC media storage means; and transferring media stream between the PoC server and the PoC media storage means; the present invention enables users to obtain complete contents of the whole session when they are absent from the session, and can be realized easily.

Abstract: A method and a system for talk burst control in wireless PoC in the field of group talk technology and a moderator terminal therefore, wherein the method comprises: determining, by a moderator terminal, a talk burst sequence and delivering a talk burst dispatch message to a PoC server; dispatching, by the PoC server, the talk burst to a user terminal according to the talk burst dispatch message. According to the method and the system of the invention, the operation on talk burst control will be more flexible and the requirements of a scheduling system will be met more satisfactorily.

Abstract: A method and a system for adding a group member, includes: sending a client corresponding to a user to be possibly added to a group a notification message to confirm whether the user agrees to be added to the group; obtaining a confirmation result from the client, and adding to the group the user who agrees to be added to the group. By utilizing the method and the system, unwanted disturbance caused by group management in a group communication system is lessened, meanwhile security of a group communication system is improved, and illegal spread of media which is harmful to individuals and society caused by flaws of a group system may be prevented.