Systems, methods, apparatuses, and computer program products for facilitating voice call continuity in intersystem handover

摘要

Systems, methods, apparatuses, and computer program products are provided for facilitating voice call continuity in intersystem handover. A method may include determining that a user equipment device being handed over from a packet switched network to a circuit switched network is a party to a voice call in an alerting state. The method may further include providing session state information indicating that the user equipment device is a party to a voice call in an alerting state to a network entity on the circuit switched network in response to the determination. Corresponding systems, computer program products and apparatuses are also provided.

主权项

1. A method comprising:
determining, by a service centralization and continuity application server, that a user equipment being handed over from a packet switched network to a circuit switched network is a party to a voice call in an alerting state, wherein the alerting state represents a ringing state; and providing, by the service centralization and continuity application server, session state information to a network entity on the circuit switched network, wherein the session state information indicates that the user equipment is in an alerting state, wherein the providing is in response to the determining.