System, apparatus, and method for establishing circuit-switched communications via packet-switched network signaling
First Claim
1. A method comprising:
- forming a session initiation protocol (SIP) INVITE at a first user equipment (UE-A) to establish a SIP dialog associated with originating a call in the CIS domain with a second user equipment (UE-B), the SIP INVITE message including a session description protocol (PSTN) payload comprising;
a) a connection data field indicating public switched telephony network (PSTN) connection parameters;
b) a media type indicating an audio stream; and
c) an indication that the circuit-switched (CS) domain will be used for delay-sensitive class flow;
sending the SIP INVITE message via an Internet Protocol Multimedia Subsystem (IMS);
receiving a SIP response comprising a CS bearer media descriptor that includes a phone number associated with the UE-B; and
sending, in response to receiving the SIP response, a circuit-switched call setup message to establish the call via the circuit switched domain, wherein the call setup message comprises the phone number associated with the UE-B.
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Abstract
A system, apparatus and method for establishing circuit-switched (CS) communications in packet-switched (PS) multimedia networks such as IMS, and providing services via the PS networks to CS domain users. A dialog is established between terminals through the PS multimedia network. A service is provided to at least one of the terminals by way of the dialog. CS bearer information, including an indication that a communication flow is requested via a CS network, is communicated between the terminals by way of the dialog. A communication flow via the CS network is effected between the terminals as directed by the CS bearer information. IMS or other PS multimedia network services can thus be provided to users otherwise communicating via the CS-domain.
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Citations
17 Claims
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1. A method comprising:
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forming a session initiation protocol (SIP) INVITE at a first user equipment (UE-A) to establish a SIP dialog associated with originating a call in the CIS domain with a second user equipment (UE-B), the SIP INVITE message including a session description protocol (PSTN) payload comprising; a) a connection data field indicating public switched telephony network (PSTN) connection parameters; b) a media type indicating an audio stream; and c) an indication that the circuit-switched (CS) domain will be used for delay-sensitive class flow; sending the SIP INVITE message via an Internet Protocol Multimedia Subsystem (IMS); receiving a SIP response comprising a CS bearer media descriptor that includes a phone number associated with the UE-B; and sending, in response to receiving the SIP response, a circuit-switched call setup message to establish the call via the circuit switched domain, wherein the call setup message comprises the phone number associated with the UE-B. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus comprising:
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a processor configured with instructions, the processor causing the apparatus to; form a session initiation protocol (SIP) INVITE at a first user equipment (UE-S) to establish a SIP dialog associated with originating a call in the CS domain with a second user equipment (UE-B), the SIP INVITE message including a session description protocol (SDP) payload comprising; a) a connection data field indicating public switched telephony network (PSTN) connection parameters; b) a media type indicating an audio stream; and c) an indication that the circuit-switched (CS) domain will be used for delay-sensitive class flow; send the SIP INVITE message via an Internet Protocol Multimedia Subsystem (IMS); receive a SIP response comprising a CS bearer media descriptor that includes a phone number associated with the UE-B; and send, in response to receiving the SIP response, a circuit-switched call setup message to establish the call via the circuit switched domain, wherein the call setup message comprises the phone number associated with the UE-B. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A non-transitory computer-readable storage medium having instructions stored thereon which are executable by a computer for performing:
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forming a session initiation protocol (SIP) INVITE at a first user equipment (UE-A) to establish a SIP dialog associated with originating a call in the CS domain with a second user equipment (UE-B), the SIP INVITE message including a session description protocol (SDP)_payload comprising; a) a connection data field indicating public switched telephony network (PSTN) connection parameters; b) a media type indicating an audio stream; and c) an indication that a circuit-switched (CS) domain will be used for delay-sensitive class flow; sending the SIP INVITE message via an Internet Protocol Multimedia Subsystem (IMS); receiving a SIP response comprising a CS bearer media descriptor that includes a phone number associated with the UE-B; and sending, in response to receiving the SIP response, a circuit-switched call setup message to establish the call via the circuit switched domain, wherein the call setup message comprises the phone number associated with the UE-B. - View Dependent Claims (16, 17)
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Specification