Communication control method, radio terminal, and base station
A control method according to one embodiment is for controlling early data transmission configured to perform user data transmission during a random access procedure. The control method comprises: transmitting, by the user equipment to a base station during the random access procedure, a random access preamble configured for the early data transmission; and transmitting, by the user equipment to the base station during the random access procedure, a MSG 3 message including uplink user data. The MSG 3 message further includes a Medium Access Control (MAC) Control Element (CE) indicating that no downlink user data transmission is expected.
1. A control method for controlling early data transmission configured to perform user data transmission during a random access procedure comprising:
transmitting, by the user equipment to a base station during the random access procedure, a random access preamble configured for the early data transmission; and
transmitting, by the user equipment to the base station during the random access procedure, a MSG 3 message including uplink user data, wherein
the MSG 3 message further includes a Medium Access Control (MAC) Control Element (CE) indicating that no downlink user data transmission is expected.
2. A user equipment configured to perform early data transmission in which user data is transmitted during a random access procedure, the user equipment comprising:
a processor and a memory, the processor is configured to
transmit to a base station during the random access procedure, a random access preamble configured for the early data transmission, and
transmit to the base station during the random access procedure, a MSG 3 message including uplink user data, wherein
the MSG 3 message further includes a Medium Access Control (MAC) Control Element (CE) indicating that no downlink user data transmission is expected.
3. An apparatus for controlling a user equipment configured to perform early data transmission in which user data is transmitted during a random access procedure, the apparatus comprising:
a processor and a memory, the processor is configured to
transmit to a base station during the random access procedure, a random access preamble configured for the early data transmission, and
transmit to the base station during the random access procedure, a MSG 3 message including uplink user data, wherein
the MSG 3 message further includes a Medium Access Control (MAC) Control Element (CE) indicating that no downlink user data transmission is expected.
4. A base station configured to communicate with a user equipment configured to perform early data transmission in which user data is transmitted during a random access procedure, the base station comprising:
a processor and a memory, the processor is configured to
receive from the user equipment during the random access procedure, a random access preamble configured for the early data transmission, and
receive from the user equipment during the random access procedure, a MSG 3 message including uplink user data, wherein
the MSG 3 message further includes a Medium Access Control (MAC) Control Element (CE) indicating that no downlink user data transmission is expected.