A method of operating a communications device to provide a ranging-based service which uses a proximity between the communications device and at least one other communications device, the method comprising transmitting, by transceiver circuitry in the communications device, a discovery signal to the at least one other communications device, the discovery signal including an indication that the communications device is attempting to initiate a ranging-based service with the at least one other communications device; receiving, by the transceiver circuitry in the communications device, a response signal from the at least one other communications device; determining, by control circuitry in the communications device, an estimate of an angle-of-arrival of the response signal to the communications device and an estimate of a distance between the communications device and the at least one other communications device from the response signal; using, by the control circuitry in the communications device, the estimate of the angle-of-arrival of the response signal to the communications device and the estimate of the distance between the communications device and the at least one other communications device to initiate the ranging-based service between the communications device and the at least one other communications device, characterized in that the transmitting, by the transceiver circuitry in the communications device, the discovery signal to the at least one other communications device, comprises transmitting the discovery signal in a Physical Sidelink Broadcast Channel, PSBCH and the indication that the communications device is attempting to initiate the ranging-based service with the at least one other communications device is indicated by one or more bits in the PSBCH, transmitting, by the transceiver circuitry in the communications device, a plurality of copies of the discovery signal in a plurality of directions in a plurality of pre-defined time intervals, and including, by the control circuitry in the communications device, an indication of a direction of transmission of the respective copy of the discovery signal in each of the plurality of copies of the discovery signal. transmitting, by transceiver circuitry in the communications device, a discovery signal to the at least one other communications device, the discovery signal including an indication that the communications device is attempting to initiate a ranging-based service with the at least one other communications device; receiving, by the transceiver circuitry in the communications device, a response signal from the at least one other communications device; determining, by control circuitry in the communications device, an estimate of an angle-of-arrival of the response signal to the communications device and an estimate of a distance between the communications device and the at least one other communications device from the response signal; using, by the control circuitry in the communications device, the estimate of the angle-of-arrival of the response signal to the communications device and the estimate of the distance between the communications device and the at least one other communications device to initiate the ranging-based service between the communications device and the at least one other communications device, characterized in that the transmitting, by the transceiver circuitry in the communications device, the discovery signal to the at least one other communications device, comprises transmitting the discovery signal in a Physical Sidelink Broadcast Channel, PSBCH and the indication that the communications device is attempting to initiate the ranging-based service with the at least one other communications device is indicated by one or more bits in the PSBCH, transmitting, by the transceiver circuitry in the communications device, a plurality of copies of the discovery signal in a plurality of directions in a plurality of pre-defined time intervals, and including, by the control circuitry in the communications device, an indication of a direction of transmission of the respective copy of the discovery signal in each of the plurality of copies of the discovery signal.