System and method for provision of IMS based services for legacy CS UE with home node B access
First Claim
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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;
providing, by a femtocell, an interface between the CS device and the IMS system; and
sending, by the femtocell, mobility signaling to an inter-working function (IWF), the IWF providing an interface for communicating the mobility signaling between the femtocell and a CS core network, wherein the mobility signaling is used for handing over a communications session of the UE from the femtocell to the CS core network.
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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.
39 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; providing, by a femtocell, an interface between the CS device and the IMS system; and sending, by the femtocell, mobility signaling to an inter-working function (IWF), the IWF providing an interface for communicating the mobility signaling between the femtocell and a CS core network, wherein the mobility signaling is used for handing over a communications session of the UE from the femtocell to the CS core network. - View Dependent Claims (2, 3, 4, 5)
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6. A method for providing wireless access to a user equipment (UE), the method comprising:
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receiving, at a home node B (HNB), an attach request for wireless communications from the UE 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, by the HNB, the mobility component to an inter-working element that provides an interface between the HNB and a circuit switch core network, wherein the mobility component includes signaling information for handing over a communications session of the UE from the HNB to the circuit switch (CS) core network. - View Dependent Claims (7, 8)
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9. A system for providing wireless communications, the system comprising:
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a femtocell configured for wireless communications with a user equipment (UE) 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) configured to provide an interface between the femtocell and a CS core network for transporting mobility signaling from the femtocell to the CS core network, wherein the mobility signaling is used to hand over a communications session of the UE from the femtocell to the CS core network. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A femtocell for providing wireless access to a circuit switch (CS) user equipment (UE), the femtocell comprising:
- a processor; and
a non-transitory computer readable storage medium storing programming for execution by the processor, the programming including instructions to;
establish a communications session of the CS UE, wherein the communications session is transported over path extending through the femtocell to a packet switched (PS) network; and
forward a mobility signaling component to an inter-working element that provides an interface between the femtocell and a CS core network, wherein the mobility signaling component is used to execute a handover of the communications session from the femtocell to the CS core network. - View Dependent Claims (17, 18, 19, 20)
- a processor; and
Specification