Method and apparatus for supporting circuit switched interworking
AssigneeInterDigital Technology Corporation
InventorKamel M. Shaheen
Life of this patent
Estimating the term…
Abstract
A wireless transmit/receive unit communicates with a second wireless transmit/receive unit in a combined circuit switched (CS) session and an IP multimedia core network subsystem (IMS) session, where the second wireless transmit/receive unit uses VoIP.
Claims10
A method implemented in a first wireless transmit/receive unit (WTRU) for communication with a second WTRU via a wireless network, the first WTRU being configured to support a circuit switched (CS) voice call and an IP multimedia core network subsystem (IMS), the method comprising:
- receiving a Session Initiation Protocol (SIP) Invite message that indicates a request for the first WTRU to participate in a combined CS and IMS session with the second WTRU, wherein the combined CS and IMS session includes a CS call and a PS session at the first WTRU, and a voice over IP (VoIP) call at the second WTRU;
- and
- sending a SIP OK message to the second WTRU in response to the SIP Invite message.
A wireless transmit/receive unit (WTRU) in a wireless communication with a second WTRU via a wireless network, the WTRU comprising:
- a circuit switched (CS) domain device configured to process a voice call;
- an IP multimedia core network subsystem (IMS) domain device configured to:
- process a media content session,
- receive a Session Initiation Protocol (SIP) Invite message that indicates a request for the WTRU to participate in a combined CS and IMS session with the second WTRU, wherein the combined CS and IMS session includes a CS call and a PS session at the WTRU, and a voice over IP (VoIP) call at the second WTRU, and
- send an SIP OK message to the second WTRU in response to the SIP Invite message.
Dependencies are inferred from the claim text.