An apparatus comprising: a vehicle base station configured and arranged to: transmit radio frequency signals including a number N of at least three data packets with a time gap T G (T G) between each data packet, each data packet having a first length in time T 1 (T 1) and including data that is common to all three data packets, after transmitting the at least three data packets, transmit a radio frequency signal including a wake-up data packet; and a remote transceiver circuit having a data-receiving circuit configured and arranged to receive the radio frequency signals from the vehicle base station, the remote transceiver circuit being configured and arranged to: intermittently transition between on and off states in which the data-receiving circuit is respectively enabled and not enabled, each on state having a length in time T ON (T ON) in which T ON ≥ T G + 2T 1, and each off state having a length in time T OFF (T OFF) in which T OFF < (N - 2) * T 1 + (N - 1) * T G, and in response to receiving at least one of the three data packets via the data-receiving circuit, operate in the on state for at least a period T ON, and in response to receiving the wake-up data packet while operating in the on state, transmitting response data to the vehicle base station. a vehicle base station configured and arranged to: transmit radio frequency signals including a number N of at least three data packets with a time gap T G (T G) between each data packet, each data packet having a first length in time T 1 (T 1) and including data that is common to all three data packets, after transmitting the at least three data packets, transmit a radio frequency signal including a wake-up data packet; and transmit radio frequency signals including a number N of at least three data packets with a time gap T G (T G) between each data packet, each data packet having a first length in time T 1 (T 1) and including data that is common to all three data packets, after transmitting the at least three data packets, transmit a radio frequency signal including a wake-up data packet; and a remote transceiver circuit having a data-receiving circuit configured and arranged to receive the radio frequency signals from the vehicle base station, the remote transceiver circuit being configured and arranged to: intermittently transition between on and off states in which the data-receiving circuit is respectively enabled and not enabled, each on state having a length in time T ON (T ON) in which T ON ≥ T G + 2T 1, and each off state having a length in time T OFF (T OFF) in which T OFF < (N - 2) * T 1 + (N - 1) * T G, and in response to receiving at least one of the three data packets via the data-receiving circuit, operate in the on state for at least a period T ON, and in response to receiving the wake-up data packet while operating in the on state, transmitting response data to the vehicle base station. intermittently transition between on and off states in which the data-receiving circuit is respectively enabled and not enabled, each on state having a length in time T ON (T ON) in which T ON ≥ T G + 2T 1, and each off state having a length in time T OFF (T OFF) in which T OFF < (N - 2) * T 1 + (N - 1) * T G, and in response to receiving at least one of the three data packets via the data-receiving circuit, operate in the on state for at least a period T ON, and in response to receiving the wake-up data packet while operating in the on state, transmitting response data to the vehicle base station. operate in the on state for at least a period T ON, and in response to receiving the wake-up data packet while operating in the on state, transmitting response data to the vehicle base station.