FIELD: radio engineering, communication.
SUBSTANCE: mobile communication method includes steps of: sending "INVITE" from UE#1 to a P-CSCF (proxy-call session control function)/VATF (visited access transfer function) in a visited network of the UE#1; sending "INVITE" from the P-CSCF/VATF to an IMS (IP multimedia subsystem); and allocating, by the P-CSCF/VATF, an MGW#1 to the path for voice communication.
EFFECT: preventing wastage of media gateway resources in a visited network when switching a voice communication channel between user equipment.
6 cl, 7 dwg
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