Method and apparatus for inactive mode operation in wireless communication system

A terminal in a wireless communication system, the terminal comprising:

• a transceiver;
• and
• a controller configured to:
• receive, via the transceiver, a first radio resource control (RRC) release message including paging area information,
• transmit, via the transceiver, an RRC resume request message including a resume cause set to an update of paging area in case that the terminal is in an RRC inactive state and the update of paging area is required based on the paging area information, wherein the update of paging area is required in case that the terminal enters an area not belonging to a paging area configured by the paging area information,
• receive, via the transceiver, a second RRC release message including new paging area information,
• apply the new paging area information,
• receive, via the transceiver, a paging message including a paging identifier,
• perform actions upon going to an RRC idle in case that the paging identifier corresponds to a core network (CN) paging identifier, and
• initiate an RRC connection resume procedure in case that the paging identifier corresponds to a radio access network (RAN) paging identifier.

A method performed by a base station in a wireless communication system, the method comprising:

• receiving, from a terminal, an RRC resume request message including a resume cause set to an update of paging area in case that the terminal is in an RRC inactive state and the update of paging area is required based on paging area information included in a first radio resource control (RRC) release message, wherein the update of paging area is required in case that the terminal enters an area not belonging to a paging area configured by the paging area information;
• transmitting, to the terminal, a second RRC release message including new paging area information for applying updated paging area;
• and
• transmitting, to the terminal, a paging message including a paging identifier,
• wherein actions upon going to an RRC idle are performed in case that the paging identifier corresponds to a core network (CN) paging identifier, and
• wherein an RRC connection resume procedure is initiated in case that the paging identifier corresponds to a radio access network (RAN) paging identifier.

A base station in a wireless communication system, the base station comprising:

• a transceiver;
• and
• a controller configured to:
• receive, from a terminal via the transceiver, an RRC resume request message including a resume cause set to an update of paging area in case that the terminal is in an RRC inactive state and the update of paging area is required based on paging area information included in a first radio resource control (RRC) release message, wherein the update of paging area is required in case that the terminal enters an area not belonging to a paging area configured by the paging area information, and
• transmit, to the terminal via the transceiver, a second RRC release message including new paging area information for applying updated paging area, and
• transmit, to the terminal, paging message including a paging identifier,
• wherein actions upon going to an RRC idle are performed in case that the paging identifier corresponds to a core network (CN) paging identifier, and
• wherein an RRC connection resume procedure is initiated in case that the paging identifier corresponds to a radio access network (RAN) paging identifier.