CPC H04W 80/10 (2013.01) [H04W 8/08 (2013.01); H04W 24/08 (2013.01); H04W 48/16 (2013.01); H04W 76/11 (2018.02)] | 20 Claims |
1. A method, performed by a first session management function (SMF), for providing a continuous service to a user equipment (UE), the method comprising:
identifying, by the first SMF, triggering of an SMF change operation;
performing a subscription procedure with an access and mobility management function (AMF) for an event in which a status of the UE becomes an idle or an inactive;
in case that the status of the UE becomes the idle or the inactive, receiving, from the AMF, a notification message to report the event;
transmitting, to the AMF, a message indicating a change in a status of a protocol data unit (PDU) session so as to request a procedure of an SMF change, wherein the message indicating the change in the status of the PDU session includes a context identification (ID);
receiving a context request message requesting a context from a second SMF that is a target SMF; and
transmitting a context request response message to the second SMF.
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