Terminal device, base station device, management device, and communication method

A base station device comprising:

• a transceiver;
• and
• a processor,
• wherein the processor configured to
• generate setting information for measurement of one or more frequencies used for each of one or more network slices,
• provide the setting information for measurement to a terminal device,
• acquire, from the terminal device, a request for using a first network slice among the one or more network slices and a measurement result of the one or more frequencies used for the first network slice,
• when the measurement result fulfills a threshold value, start procedure of establishing or updating a PDU session including a cell operating at the frequency, and
• provide the setting information for measurement to the terminal device before receiving the request for using the first network slice.

A management device comprising:

• a communication unit;
• and
• a processor,
• the processor is configured to
• generate network slice selection assistance information including information for identifying one or more network slices that are allowed to be used within a registration area,
• generate setting information for measurement of one or more frequencies used for each of the one or more network slices included in the network slice selection assistance information,
• provide the network slice selection assistance information and the setting information for measurement to a base station device, and
• when a result of a measurement executed on the basis of the network slice selection assistance information and the setting information for measurement fulfills a threshold value,
• execute processing related to a PDU session establishment request or a service request for a first network slice that has been decided to be used among the one or more network slices is executed, and
• provides the network slice selection assistance information and the setting information for measurement before a decision to use the first network slice is made.

A method comprising:

• deciding to use a first network slice of one or more network slices;
• performing a measurement of one or more frequencies used for the first network slice;
• when a result of the measurement fulfills a threshold value, transmitting a PDU session establishment request message or a service request message to a management device via an access node (AN);
• and
• acquiring, from the AN, setting information for the measurement prior to deciding to use the first network slice.