User equipment, control device, and communication control method
Provided is a communication unit for implementing error processing of a control device of a core network and error processing of User Equipment in a case that connectivity to a Local Area Data Network (LADN) is not able to be provided in a 5GS. Provided is a communication unit for implementing error processing in which a request for establishing connectivity to a Local Area Data Network (LADN) requested by a user equipment is rejected by a control device of a core network in a case that the connectivity to the LADN is not able to be provided in a 5GS. Further, a communication unit for implementing appropriate error processing that User Equipment performs in a case that a request for establishing connectivity to the LADN is rejected.
1. A User Equipment (UE) comprising:
transmitting and receiving circuitry configured to:
in a UE-requested Protocol Data Unit (PDU) session establishment procedure,
transmit a PDU session establishment request message to a control device in a core network; and
receive a PDU session establishment reject message including a 5GS Session
Management (5GSM) cause value from the control device; and
a controller,
wherein
the controller initiates the UE-requested PDU session establishment procedure with Local Area Data Network (LADN) Data Network Name (DNN) to establish a PDU session for LADN,
in a case that the 5GSM cause value indicates the UE is out of LADN service area, the controller configures the transmitting and receiving circuitry not to send a PDU session establishment request message with the LADN DNN until LADN information for the LADN DNN is updated.
2. The UE according to claim 1 , wherein
the LADN information is updated by performing a generic UE configuration procedure or a registration procedure.
3. A control device in a core network comprising:
transmitting and receiving circuitry configured to:
in a UE-requested Protocol Data Unit (PDU) session establishment procedure,
receive a PDU session establishment request message from a User Equipment (UE); and
transmit a PDU session establishment reject message to the UE, and
a controller,
wherein
the controller performs the UE-requested PDU session establishment procedure with Local Area Data Network (LADN) Data Network Name (DNN) to establish a PDU session for LADN,
in a case that the UE is located outside of LADN service area,
the controller includes, in the PDU session establishment reject message, a 5GS Session Management (5GSM) cause value indicating the UE is out of LADN service area, and
the control device configures the UE not to send a PDU session establishment request message with the LADN DNN until LADN information for the LADN DNN is updated.
4. The control device according to claim 3 , wherein the LADN information is updated by performing a generic UE configuration procedure or a registration procedure.
5. A communication control method performed by a User Equipment (UE), the communication control method comprising:
in a UE-requested Protocol Data Unit (PDU) session establishment procedure,
transmitting a PDU session establishment request message to a control device in a core network; and
receiving a PDU session establishment reject message including a 5GS Session Management (5GSM) cause value from the control device,
wherein
the UE initiates the UE-requested PDU session establishment procedure with Local Area Data Network (LADN) Data Network Name (DNN) to establish a PDU session for LADN,
in a case that the 5GSM cause value indicates the UE is out of LADN service area, the UE does not send a PDU session establishment request message with the LADN DNN until LADN information for the LADN DNN is updated.