Radio terminal and base station

1. A user equipment as a pedestrian user equipment, comprising:

a transmitter configured to perform Pedestrian-to-Everything (P2X) communication that is a direct inter-terminal communication with another user equipment;

a receiver configured to receive, when the pedestrian user equipment is in a radio resource control (RRC) idle state, from a base station a message including a resource pool; and

a controller configured to:

when the pedestrian user equipment is in the RRC idle state, determine whether or not the resource pool included in the message is a P2X resource pool for the P2X communication;

in accordance with a determination that the resource pool included in the message is not the P2X resource pool for the P2X communication, transition from the RRC idle state to an RRC connected state for requesting a radio resource for the P2X communication to the base station, wherein

the transmitter is configured to, when the pedestrian user equipment is in the RRC connected mode, transmit capability information indicating whether the pedestrian user equipment supports sensing, and

the receiver is configured to, when the pedestrian user equipment is in the RRC connected mode, receive information indicating a resource pool that is a resource pool requiring the sensing for use of the resource pool.

2. The user equipment according to claim 1 , wherein

the controller is configured to determine whether or not the resource pool included in the message is the P2X resource pool according to a type of the resource pool.

3. The user equipment according to claim 1 , wherein

the controller is configured to include information indicating whether or not the user equipment is the pedestrian user equipment in a first message for requesting the radio resource, and

the transmitter is configured to transmit the first message to the base station.

4. An apparatus that controls a user equipment as a pedestrian user equipment, the apparatus comprising:

at least one processor and a memory communicatively coupled to the at least one processor, the at least one processor is configured to execute processes of:

performing Pedestrian-to-Everything (P2X) communication that is a direct inter-terminal communication with another user equipment;

when the pedestrian user equipment is in a radio resource control (RRC) idle state, receiving from a base station a message including a resource pool;

when the pedestrian user equipment is in the RRC idle state, determining whether or not the resource pool included in the message is a P2X resource pool for the P2X communication; and

in accordance with a determination that resource pool included in the message is not the P2X resource pool for the P2X communication, transitioning from the RRC idle state to an RRC connected state for requesting a radio resource for the P2X communication to the base station, wherein

when the pedestrian user equipment is in the RRC connected mode, transmitting capability information indicating whether the pedestrian user equipment supports sensing, and

when the pedestrian user equipment is in the RRC connected mode, receiving information indicating a resource pool that is a resource pool requiring the sensing for use of the resource pool.

5. A communication method comprising:

performing by a user equipment as a pedestrian user equipment, Pedestrian-to-Everything (P2X) communication that is a direct inter-terminal communication with another user equipment;

when the pedestrian user equipment is in a radio resource control (ARC) idle state, receiving by the pedestrian user equipment from a base station, a message including a resource pool;

when the pedestrian user equipment is in the ARC idle state, determining whether or not the resource pool included in the message is a P2X resource pool for the P2X communication; and

in accordance with a determination that the resource pool included in the message is not the resource pool for the P2X communication, transitioning from the ARC idle state to an ARC connected state for requesting a radio resource for the P2X communication to the base station,

wherein when the pedestrian user equipment is in the ARC connected mode, transmitting capability information indicating whether the pedestrian user equipment supports sensing, and

when the pedestrian user equipment is in the ARC connected mode, receiving information indicating a resource pool that is a resource pool requiring the sensing for use of the resource pool.