Terminal device executing random access procedure, base station device, control method, and computer-readable storage medium

A base station device of a mobile communication network, comprising:

• reception unit configured to receive a first message including user data from a terminal device that is in an inactive state, in a random access procedure;
• first transmission unit configured to transmit a second message as a response to the first message;
• and
• control unit configured to control the first transmission unit to:
• in a case where the first message includes predetermined information, transmit the second message that includes an instruction to transition to a connected state to the terminal device;
• and
• in a case where the first message does not include the predetermined information, transmit the second message that does not include the instruction.

A control method executed by a terminal device of a mobile communication network, comprising:

• a transmission step of transmitting a first message including user data to a base station device in a random access procedure in a mobile communication network, wherein
• in the transmission step:
• in a case where a predetermined condition for transitioning from an inactive state to a connected state is satisfied, the first message that includes predetermined information for notifying the base station device that the terminal device needs to transition to the connected state is transmitted;
• and
• in a case where the predetermined condition is not satisfied, the first message that does not include the predetermined information is transmitted.

A control method executed by a base station device of a mobile communication network, comprising:

• a reception step of receiving a first message including user data from a terminal device that is in an inactive state, in a random access procedure;
• and
• a transmission step of transmitting a second message as a response to the first message, wherein
• in the transmission step,
• in a case where the first message satisfies a predetermined condition, the second message that includes an instruction to transition to a connected state is transmitted to the terminal device;
• and
• in a case where the first message does not satisfy the predetermined condition, the second message that does not include the instruction is transmitted to the terminal device.

A computer-readable storage medium storing a program for causing a computer provided in a base station device of a mobile communication network to control a terminal device to:

• receive a first message including user data from the terminal device that is in an inactive state, in a random access procedure;
• and
• transmit a second message as a response to the first message, wherein
• in a case where the first message satisfies a predetermined condition, the second message that includes an instruction to transition to a connected state is transmitted to the terminal device;
• and
• in a case where the first message does not satisfy the predetermined condition, the second message that does not include the instruction is transmitted.