APPARATUS FOR A TRADITIONAL TERMINAL TO ACCESS AN IMS SYSTEM AND THE METHOD THEREOF
First Claim
1. An apparatus for realizing an access of a legacy terminal to an IMS system, wherein said IMS system has a CSCF function entity comprising:
- a session control module that provides signaling interworking between terminal signaling and SIP signaling and controls terminal registration and session;
a downlink signaling interface function module that provides signaling interaction with one or more legacy terminals, and provides legacy switch function for one or more legacy terminals operating under the control of said session control module;
a downlink bearer interface function module that provides a media channel with the one or more legacy terminals;
an uplink signaling interface function module that provides SIP signaling interaction with CSCF function entity of an IMS core network, and provides SIP UA function for one or more legacy terminals operating under the control of said session control module;
an uplink bearer interface function module that provides a media channel with an IMS carrier network; and
a media interworking module that provides connection and media adaptation between the uplink bearer interface function module and the downlink bearer interface function module operating under the control of said session control module.
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Accused Products
Abstract
An apparatus and method for realizing the access of a legacy terminal to an IMS system. The apparatus includes a session control module, a downlink signaling interface function module, a downlink bearer interface function module, an uplink signaling interface function module, an uplink bearer interface function module and a media interworking module. The session control module registers the terminal that has entered service status to the I-CSCF on IMS side. During the session, the uplink signaling interface function module provides SIP signaling interaction with the CSCF function entity of IMS core network; the downlink signaling interface function module provides signaling interaction with the legacy terminal; the media interworking module provides the connection and media adaptation between the uplink bearer interface function module and the downlink bearer interface function module. The invention enables the services of the legacy networks such as PSTN/ISDN and the like to be integrated with those of IMS networks, thus reducing the cost of network construction and operation.
22 Citations
11 Claims
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1. An apparatus for realizing an access of a legacy terminal to an IMS system, wherein said IMS system has a CSCF function entity comprising:
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a session control module that provides signaling interworking between terminal signaling and SIP signaling and controls terminal registration and session; a downlink signaling interface function module that provides signaling interaction with one or more legacy terminals, and provides legacy switch function for one or more legacy terminals operating under the control of said session control module; a downlink bearer interface function module that provides a media channel with the one or more legacy terminals; an uplink signaling interface function module that provides SIP signaling interaction with CSCF function entity of an IMS core network, and provides SIP UA function for one or more legacy terminals operating under the control of said session control module; an uplink bearer interface function module that provides a media channel with an IMS carrier network; and a media interworking module that provides connection and media adaptation between the uplink bearer interface function module and the downlink bearer interface function module operating under the control of said session control module. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for realizing an access of a legacy terminal to an IMS system comprising:
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detecting whether a legacy terminal has entered service status through a downlink signaling interface function module; registering a terminal that has entered service status to an I-CSCF on an IMS side through said uplink signaling interface function module; obtaining a service profile of legacy terminal users based on the interaction with an HSS module; providing SIP signaling interaction with a CSCF module of the IMS core network; providing signaling interaction with the legacy terminal; providing connection and media adaptation between an uplink bearer interface module and a downlink bearer interface module; controlling the uplink bearer interface module to provide the media channel with the IMS network; controlling downlink bearer interface function module to provide the media channel with the legacy terminal. - View Dependent Claims (10, 11)
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Specification