FIELD: radio engineering, communication.
SUBSTANCE: after user equipment (UE-1) establishes an IP multimedia messaging (IMS) session with a remote area via a packet switch (PS) network, wherein in the IMS session, signalling is anchored to an IMS control point (ICP) and media is anchored to an access gateway (AGW) controlled by the ICP, the disclosed method is carried out, comprising: sending a switch-over request by a control net element of the PS network to an enhanced mobile switch centre (eMSC) to request switch-over of the IMS session to a circuit switch (CS) network access mode; after receiving the switch-over request, preparing a media link resource by the eMSC for the UE-1 to communicate with the eMSC and sending a connection request to the ICP; and controlling the AGW to correlate a media link established by the connection request with a remote area media link of the IMS session by the ICP.
EFFECT: reducing the communication interruption time and improving communication quality for the user.
13 cl, 20 dwg
