Communication control method, radio terminal, apparatus and base station

An apparatus for controlling a user equipment configured to perform a predetermined data transmission in which the user equipment transmits uplink user data when the user equipment is in a radio resource control (RRC) inactive state, the apparatus comprising a processor and a memory, the processor configured to

• transmit to a base station during a random access procedure, a random access preamble configured for the predetermined data transmission, and
• transmit to the base station during the random access procedure, an MSG 3 message together with uplink user data.

A method used in a user equipment configured to perform a predetermined data transmission in which the user equipment transmits uplink user data when the user equipment is in a radio resource control (RRC) inactive state, the method comprising:

• transmitting to a base station during a random access procedure, a random access preamble configured for the predetermined data transmission;
• and
• transmitting to the base station during the random access procedure, an MSG 3 message together with uplink user data.

A base station configured to perform a predetermined data transmission in which a user equipment transmits uplink user data when the user equipment is in a radio resource control (RRC) inactive state, the base station comprising

• a receiver configured to receive, during a random access procedure, a random access preamble configured for the predetermined data transmission, from the user equipment, wherein
• the receiver is configured to receive from the user equipment during the random access procedure, an MSG 3 message together with uplink user data.