Wireless data apparatus, system and method

摘要

In accordance with various example embodiments, a vehicle base station wirelessly communicates data with a remote transceiver circuit. The remote transceiver circuit intermittently transitions a data-receiving circuit of the remote transceiver circuit between on and off states. The vehicle base station intermittently polls the remote transceiver circuit with a series of data packets, at least one of which the data-receiving circuit of the remote transceiver circuit will receive while in the on state. The remote transceiver circuit, upon receiving the data packet, will reset a state counter to enable the remote transceiver circuit to receive a wake-up data packet while operating in the on state; in response, transmitting response data to the vehicle base station. The data communication is carried out to facilitate authentication of the remote transceiver. Exemplary embodiments include a system for passive keyless go and passive keyless entry in a vehicle.

主权项

1. An apparatus comprising:
a vehicle base station configured and arranged to
transmit radio frequency signals including a number (N) of a plurality of data packets with a time gap (TG) between each data packet, each data packet having a first length in time (T1) and including data that is common to all plurality of data packets,after transmitting the plurality of 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 (TON) in which TON≧TG+2T1, and each off state having a length in time (TOFF) in which TOFF<(N−2)*T1+(N−1)*TG, andin response to receiving at least one of the plurality data packets via the data-receiving circuit,
operate in the on state for at least a period TON, andin response to receiving the wake-up data packet while operating in the on state, transmitting response data to the vehicle base station.