Method, push system, and relevant devices for setting up push session

A method for setting up a push session, comprising:

• receiving a Session Initiation Request (SIR) message;
• if the SIR message contains a public user identity (ID), judging, according to the SIR message and information of a client itself, whether a push session connection based on a Session Initiation Protocol (SIP) needs to be set up with a server, and if yes, setting up the push session connection based on the SIP with the server.

A push system, comprising:

• a server, configured to obtain device identity information of a client, add the device identity information of the client to a Session Initiation Request (SIR) message, send the SIR message to the client according to the device identity information of the client, and request the client to set up a push session connection based on a Session Initiation Protocol (SIP) with the server according to the SIR message;
• and
• a client, configured to receive a SIP message sent by the server, and set up the push session connection based on the SIP with the server.

A push system, comprising:

• a server, configured to add a public identity (ID) of a client to a Session Initiation Request (SIR) message, send the SIR message to all clients corresponding to the public user ID, and request all the clients to determine whether a push session connection based on a Session Initiation Protocol (SIP) needs to be set up with the server according to the SIR message;
• and
• a client, configured to receive the SIR message containing the public user ID sent by the server, and set up the push session connection based on the SIP with the server when determining that the push session connection based on the SIP needs to be set up with the server according to the SIR message and information of itself.

A client, comprising:

• a request receiving unit, configured to receive a Session Initiation Request (SIR) message;
• and
• a judging and connecting unit, configured to judge whether a push session connection based on a Session Initiation Protocol (SIP) needs to be set up with a server according to the SIR message and information of itself if the SIR message received by the request receiving unit contains a public user identity (ID), and if yes, set up the push session connection based on the SIP with the server.