Communication apparatus, base station, control method, and storage medium

A base station comprising:

• a communication unit configured to communicate with remote user equipment (UE) via relay UE;
• a reception unit configured to receive a Sidelink Relay Adaptation Protocol (SRAP) control protocol data unit (PDU), which is a PDU of SRAP, from the relay UE;
• and
• a control unit configured to, in a case where the reception unit receives the SRAP control PDU in which stop-related information related to a stop of relay performed via the relay UE is stored, perform communication control for the communication unit based on the stop-related information.

A method of controlling communication, the method comprising:

• relaying communication between a base station and remote user equipment (UE);
• generating a Sidelink Relay Adaptation Protocol (SRAP) control protocol data unit (PDU) that is a PDU of SRAP;
• and
• transmitting the SRAP control PDU generated by the generating,
• wherein, in a case where a predetermined condition is satisfied in a situation where relay is performed by the relaying, the generating includes storing, in the SRAP control PDU, stop-related information related to a stop of the relay by the relaying.

A control method comprising:

• communicating with remote UE via relay user equipment (UE);
• receiving a Sidelink Relay Adaptation Protocol (SRAP) control protocol data unit (PDU), which is a PDU of SRAP, from the relay UE;
• and
• performing, in a case where the SRAP control PDU in which stop-related information related to a stop of relay performed via the relay UE is stored is received by the receiving, communication control related to the communicating based on the stop-related information.

A non transitory computer-readable storage medium storing a program causing a computer to perform:

• communicating with remote user equipment (UE) via relay UE;
• receiving a Sidelink Relay Adaptation Protocol (SRAP) control protocol data unit (PDU), which is a PDU of SRAP, from the relay UE;
• and
• performing, in a case where the SRAP control PDU in which stop-related information related to a stop of relay performed via the relay UE is stored is received by the receiving, communication control related to the communicating based on the stop-related information.