Method and architecture for accessing an internet protocol multimedia subsystem (IMS) over a wireless local area network (WLAN)
First Claim
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1. Apparatus for enabling one of a wireless local area network (WLAN) and a wireless wide area network (WWAN) to access an internet protocol multimedia subsystem (IMS), comprising:
- a packet data gateway (PDG) coupled between said IMS and one of said WLAN and WWAN for providing IMS services to subscribers operating in said one of said WLAN and said WWAN systems.
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Abstract
A method and architecture for accessing an IMS over WLANs/WWANs generally, and more particularly over WLANs/WWANs viewed in light of existing related standards is disclosed. More specifically, the invention provides new interfaces enabling IMS access over WLANs/WWANs, and an exemplary method and architecture for such an interface.
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Citations
24 Claims
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1. Apparatus for enabling one of a wireless local area network (WLAN) and a wireless wide area network (WWAN) to access an internet protocol multimedia subsystem (IMS), comprising:
a packet data gateway (PDG) coupled between said IMS and one of said WLAN and WWAN for providing IMS services to subscribers operating in said one of said WLAN and said WWAN systems. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method employing a packet data gateway (PDG) for use in providing services to wireless transmit/receive units (WTRUs) communicating with a wireless local area network (WLAN) interworked with a cellular network having an internet protocol multimedia subsystem forming part of a call state control function (CSCF), comprising:
said PDG routing packet data between a packet data network and a WTRU through said WLAN.
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10. A method employing a packet data gateway (PDG) for use in providing services to wireless transmit/receive units (WTRUs) communicating with a wireless local area network (WLAN) interworked with a cellular network having an internet protocol multimedia subsystem (IMS) forming part of a call state control function (CSCF), comprising:
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said cellular network generating a short message, transfer protocol data unit (TPDU); and
said PDG;
receiving the short message TPDU;
checking the short message TPDU for errors; and
encapsulating and sending the short message TPDU to a targeted one of said WTRUs. - View Dependent Claims (11, 12, 13)
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14. A method for accessing an internet protocol multimedia subsystem (IMS) over wireless local area networks (WLANs) and/or wireless wide area networks (WWANs) and compatible with standard 3GPP TS 23.234, comprising:
providing a packet data gateway (PDG) between said IMS and one of said WLANs/WWANs to enable 3GPP based IMS access over said one of said WLANs/WWANs. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
Specification