Method, system and gateway device for enabling interworking between IP and CS networks
First Claim
1. A method comprising:
- receiving a Session Initiation Protocol (SIP) Refer message for a conference call between a first device in a circuit-switched network and a second device in an Internet protocol (IP)-based network at a gateway device from the second device, the SIP Refer message including first address information associated with the first device, second address information associated with the second device, and third address information associated with a conference controller, wherein the first address information comprises a uniform resource indicator including a telephone number of the first device included in a Request field of the SIP Refer message;
sending a first message to the first device from the gateway device;
receiving a first response from the first device at the gateway device establishing a first call leg towards the first device based on the first address information;
requesting a subscriber identity from the first device and checking the first address information based on the requested subscriber identity;
sending a second message to the conference controller from the gateway device;
receiving a second response from the conference controller at the gateway device establishing a second call leg towards the conference controller located in the IP-based network based on the third address information obtained from the SIP Refer message; and
connecting the first and second call legs to form a single connection.
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Accused Products
Abstract
A method, system and gateway device enables interworking between an IP-based network and a circuit-switched network. A first address information of a first connection end located in the circuit-switched network is routed in a trigger message from the IP-based network to a gateway control function. The first and second call legs are established in parallel towards the first connection end based on the first address information, and towards a second connection end located in the IP-based network based on a second address information obtained from the trigger message. A single connection between the two connection ends is then established by connecting the first and second call legs. Thereby, IP-based signaling functionality can be used to add capability for subscribers located in the CS domain to be invited into conferences or calls with subscribers located in an IP-based domain, e.g. the IMS domain.
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Citations
26 Claims
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1. A method comprising:
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receiving a Session Initiation Protocol (SIP) Refer message for a conference call between a first device in a circuit-switched network and a second device in an Internet protocol (IP)-based network at a gateway device from the second device, the SIP Refer message including first address information associated with the first device, second address information associated with the second device, and third address information associated with a conference controller, wherein the first address information comprises a uniform resource indicator including a telephone number of the first device included in a Request field of the SIP Refer message; sending a first message to the first device from the gateway device; receiving a first response from the first device at the gateway device establishing a first call leg towards the first device based on the first address information; requesting a subscriber identity from the first device and checking the first address information based on the requested subscriber identity; sending a second message to the conference controller from the gateway device; receiving a second response from the conference controller at the gateway device establishing a second call leg towards the conference controller located in the IP-based network based on the third address information obtained from the SIP Refer message; and connecting the first and second call legs to form a single connection. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A gateway device configured:
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to receive from an Internet protocol (IP)-based network a Session Initiation Protocol (SIP) Refer message for a conference call between a first device in a circuit-switched network and a second device in the IP-based network, the SIP Refer message comprising a first address information associated with the first device, a second address information associated with the second device, and third address information associated with a conference controller, wherein the first address information comprises a uniform resource indicator including a telephone number of the first device included in a Request field of the SIP Refer message; in response to the SIP Refer message, to send a first message to the first device and to receive a first response from the first device to establish a first call leg towards the first device located in the circuit-switched network, based on the first address information; to request a subscriber identity from the first device and check the first address information based on the requested subscriber identity; to send a second message to the conference controller and to receive a second response from the conference controller to establish a second call leg towards the conference controller located in the IP-based network based on the third address information; and further configured to connect the first and second call legs to form a single connection. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A network system for enabling interworking between different networks, the system comprising:
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a gateway device configured to enable interworking between a circuit-switched network and the IP-based network, the gateway device configured; to receive a Session Initiation Protocol (SIP) Refer message from an Internet protocol (IP)-based network for a conference call between a first device in the circuit-switched network and a second device in the IP-based network, the SIP Refer message comprising first address information associated with the first device, second address information associated with the second device, and third address information associated with a conference controller, wherein the first address information comprises a uniform resource indicator including a telephone number of the first device included in a Request field of the SIP Refer message; in response to the received SIP Refer message, to send a first message to the first device based on the first address information and to receive a first response from the first device to establish a first call leg towards the first device; to request a subscriber identity from the first device and check the first address information based on the requested subscriber identity; to send a second message to the conference controller based on the third address information and to receive a second response from the conference controller to establish a second call leg towards the conference controller; and to connect the first and second call legs to form a single connection. - View Dependent Claims (22, 23)
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24. A gateway device comprising:
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receiver configured to receive a first address information of a first device located in a circuit-switched network in a Session Initiation Protocol (SIP) Refer message, the SIP Refer message received from a second device in an Internet protocol (IP)-based network for a conference call between the first device and the second device, the SIP Refer message comprising second address information associated with the second device and third address information associated with a conference controller, wherein the first address information comprises a uniform resource indicator including a telephone number of the first device included in a Request field of the SIP Refer message; transmitter configured to send a first message to the first device based on the first address information and for sending a second message to the conference controller based on the third address information; wherein a subscriber identity is requested from the first device and means for checking the first address information based on the requested subscriber identity; wherein the receiver is further configured to receive a first response from the first device for establishing a first call leg towards the first device based on the first address information; wherein the receiver is further configured to receive a second response from the conference controller for establishing a second call leg towards the conference controller located in the IP-based network based on the third address information obtained from the SIP Refer message; and wherein the first and second call legs are connected to form a single connection. - View Dependent Claims (25, 26)
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Specification