System and Method for Provision of IMS Based Services for Legacy CS UE with Home Node B Access
First Claim
Patent Images
1. A method for performing wireless communications, the method comprising:
- receiving a circuit switch (CS) attach request from a CS device;
causing a CS bearer channel to be established with the CS device;
causing an IP multimedia services (IMS) bearer channel to be established with an IMS system; and
providing an interface between the CS device and the IMS system.
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Abstract
A system and method for allowing legacy circuit switched user equipment (CS UE) to operate via a packet-switch system, such as an IP Multimedia Subsystem (IMS) system, is provided. The mobility and session control aspects of communications with a legacy CS UE is separated. A user agent is placed in the receiving node (e.g., a home node B) that acts as the SIP agent for the CS UE for session control. An interworking function is provided to allow mobility between the macro CS network and the PS (e.g., IMS) network.
71 Citations
20 Claims
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1. A method for performing wireless communications, the method comprising:
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receiving a circuit switch (CS) attach request from a CS device; causing a CS bearer channel to be established with the CS device; causing an IP multimedia services (IMS) bearer channel to be established with an IMS system; and providing an interface between the CS device and the IMS system. - View Dependent Claims (2, 3, 4, 5)
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6. A method for performing wireless communications, the method comprising:
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receiving an attach request for wireless communications via circuit switch techniques; separating a mobility component and a session control component of the wireless communications; forwarding the session control component to a packet-switch network; and forwarding the mobility component to an inter-working element, the inter-working element interfacing mobility information to a circuit switch network. - View Dependent Claims (7)
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8. A system for providing wireless communications, the system comprising:
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a femtocell configured for wireless communications with user equipment using circuit switch (CS) signaling, the femtocell further configured to transmit session control information to a packet-switch (PS) network using PS signaling; and an inter-working function (IWF), the IWF receiving location information from the femtocell and interfacing with a CS core network to provide mobility capabilities to the user equipment. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A communications system comprising:
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a home network node B configured to transmit and receive communications with circuit switch (CS) user equipment (UE); and a home user agent, the home user agent interfacing between the CS UE and an IP multimedia services (IMS) system, the home user agent further separating a CS attachment into a mobility component and a session control component. - View Dependent Claims (17, 18, 19, 20)
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Specification