Area update procedure(s) for radio system

A base station apparatus that communicates with a terminal apparatus, comprising:

• transmitter circuitry configured to
• transmit a first list during a registration procedure with a core network, the first list being used to identify an area for a tracking area update procedure for the core network, and
• transmit, to the terminal apparatus, a Radio Resource Control (RRC) message comprising a second list, the second list being used to identify a Radio Access Network-based (RAN-based) notification area;
• receiver circuitry configured to receive, from the terminal apparatus, a RAN-based notification area update upon the terminal apparatus moving out of the RAN-based notification area, in a case where the terminal apparatus is in RRC_INACTIVE state;
• and
• processor circuitry configured to process the received RAN-based notification area update, wherein
• Access Stratum (AS) context is stored during the RRC_INACTIVE state, and
• the first and the second list are specified by a first set of one or more tracking area codes and a second set of one or more tracking area codes respectively.

A method for a terminal apparatus that communicates with a base station apparatus, comprising:

• receiving a first list during a registration period with a core network, the first list being used to identify an area for a tracking area update procedure for the core network;
• receiving, from the base station apparatus, a Radio Resource Control (RRC) message comprising a second list, the second list being used to identify a Radio Access Network-based (RAN-based) notification area;
• and
• performing, in a case where the terminal apparatus is in RRC_INACTIVE state, the RAN-based notification area update procedure upon the terminal apparatus moving out of the RAN-based notification area, wherein
• Access Stratum (AS) context is stored during the RRC_INACTIVE state, and
• the first and the second list are specified by a first set of one or more tracking area codes and a second set of one or more tracking area codes respectively.

A method for a base station apparatus that communicates with a terminal apparatus, comprising:

• transmitting a first list during a registration procedure with a core network, the first list being used to identify an area for a tracking area update procedure for the core network;
• transmitting, to the terminal apparatus, a Radio Resource Control (RRC) message comprising a second list, the second list being used to identify a Radio Access Network-based (RAN-based) notification area;
• receiving, from the terminal apparatus, a RAN-based notification area update upon the terminal apparatus moving out of the RAN-based notification area, in a case where the terminal apparatus is in RRC_INACTIVE state;
• and
• processing the received RAN-based notification area update;
• wherein
• Access Stratum (AS) context is stored during the RRC_INACTIVE state, and
• the first and the second list are specified by a first set of one or more tracking area codes and a second set of one or more tracking area codes respectively.