Method and apparatus for media independent handover

H - Electricity – 04 – L

Patent

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Details

H04L 29/06 (2006.01) H04L 12/28 (2006.01)

Patent

CA 2675843

A method and apparatus for performing a handover are disclosed. An Internet protocol (IP) multimedia subsystem (IMS) client registers with an IMS network and establishes a media independent handover (MIH) session with an MIH application server using a session initiation protocol (SIP). The IMS client establishes a session for IP-based service, (e.g., voice over IP (VoIP)), with a communication peer using an SIP. MIH messages are exchanged for handover with the MIH application server over IP. After handover, the session is resumed. A serving call session control function (S-CSCF) triggers the MIH application server based on a string "MIH services" and a unique identifier included in an INVITE request. The IMS client may send a REFER request to the MIH application server after the handover to resume the session. Alternatively, the IMS client may send a RE-INVITE request to the MIH application server and the communication peer.

L'invention concerne un procédé et un appareil pour effectuer un transfert. Un client de sous-système multimédia (IMS) de protocole Internet (IP) se connecte à un réseau IMS et établit une session de transfert indépendant de contenu multimédia (MIH) avec un serveur d'application MIH en utilisant un protocole d'ouverture de session (SIP). Le client IMS établit une session pour un service via IP, (par exemple voix sur IP (VoIP)), avec un poste de communication en utilisant un SIP. Des messages MIH sont échangés pour un transfert avec le serveur d'application MIH sur IP. Après le transfert, la session est reprise. Une fonction de commande de session d'appel de desserte (S-CSCF) déclenche le serveur d'application MIH sur la base d'une chaîne "services MIH" et d'un identifiant unique inclus dans une requête INVITE. Le client IMS peut envoyer une requête REFER au serveur d'application MIH après le transfert pour reprendre la session. En variante, le client IMS peut envoyer une requête RE-INVITE au serveur d'application MIH et au poste de communication.

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