METHOD AND APPARATUS FOR MEDIA INDEPENDENT HANDOVER
First Claim
1. A method of performing a handover, the method comprising:
- registering with an Internet protocol (IP) multimedia subsystem (IMS) network;
establishing a media independent handover (MIH) session with an MIH application server using a session initiation protocol (SIP);
establishing a session for IP-based service with a communication peer using an SIP;
detecting a need for a handover;
exchanging an MIH message for a handover with the MIH application server over an IP; and
performing a handover and resuming the session for IP-based service.
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Accused Products
Abstract
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.
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Citations
53 Claims
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1. A method of performing a handover, the method comprising:
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registering with an Internet protocol (IP) multimedia subsystem (IMS) network; establishing a media independent handover (MIH) session with an MIH application server using a session initiation protocol (SIP); establishing a session for IP-based service with a communication peer using an SIP; detecting a need for a handover; exchanging an MIH message for a handover with the MIH application server over an IP; and performing a handover and resuming the session for IP-based service. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of performing a handover, the method comprising:
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receiving an INVITE request from an Internet protocol (IP) multimedia subsystem (IMS) client via a serving call session control function (S-CSCF); creating a binding for the IMS client; establishing a media independent handover (MIH) session with the IMS client using a session initiation protocol (SIP); and exchanging an MIH message for a handover with the IMS client over an IP. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A wireless transmit/receive unit (WTRU) for performing a handover, the WTRU comprising:
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an Internet protocol (IP) multimedia subsystem (IMS) application layer configured to establish a session for IP-based service with a communication peer using a session initiation protocol (SIP); a service policy entity configured to establish a media independent handover (MIH) session with an MIH application server using an SIP and perform a handover so that the session for IP-based service is resumed after the handover; and an MIH function entity configured to exchange an MIH message with the MIH application server over an IP. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. A media independent handover (MIH) application server for supporting a handover, the MIH application server comprising:
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a session initiation protocol (SIP) interface for receiving an INVITE request from an Internet protocol (IP) multimedia subsystem (IMS) client via a serving call session control function (S-CSCF); a mobility and handover policy function (MHPF) entity for creating a binding for the IMS client and establishing an MIH session with the IMS client; and an MIH function entity for exchanging an MIH message for a handover with the IMS client over an IP. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53)
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Specification