Enhanced Voice Roaming for UE Devices Associated with a Home Network without SRVCC

摘要

Some embodiments relate to a cellular network which better utilizes packet-switched (PS) voice technologies, such as VoLTE, for roaming user equipment (UE) devices. When a roaming UE associated with a home cellular carrier that does not support PS to CS handover (SRVCC) desires to make a VoLTE call, the cellular network may determine probability of such a handover during the the call. The cellular network may selectively accept or reject the packet-switched wireless voice call based on the handover probability. If the probability of handover is high, the cellular network may reject the packet-switched wireless voice and trigger the UE to fall back to a circuit-switched network and re-originate the wireless voice call on the circuit-switched network. In the case of a mobile terminated call, the cellular network may provide signaling to the UE to perform a fallback to a circuit-switched network in order to receive the mobile terminated call.

主权项

1. A method performed by a cellular network, the method comprising:
receiving, in a wireless manner, a request from a user equipment (UE) to make a packet-switched wireless voice call; determining that the UE is associated with a home cellular carrier that does not support handover from a packet-switched network to a circuit-switched network; determining information regarding probability of a handover of the packet-switched wireless voice call from the packet-switched network to the circuit-switched network; providing, in a wireless manner, signaling to the UE rejecting the packet-switched wireless voice call, wherein said providing signaling to the UE rejecting the packet-switched wireless voice call is performed in response to said determining that the UE is associated with the home cellular carrier that does not support handover from the packet-switched network to the circuit-switched network and is based on the probability of the handover from the packet-switched network to the circuit-switched network during the packet-switched wireless voice call.