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Application US20190138018
Published 2019-05-09
Autonomous Driving System Emergency Signaling
A vehicular autonomous driving system includes a time division multiplexed (TDM) bus, an autonomous driving (AD) controller coupled to the TDM bus, and a plurality of AD sensors coupled to the TDM bus. The AD sensors are configured to collect AD data and transmit collected AD data to the AD controller on the TDM bus in an assigned time slot at a first power level. A first
AD sensor of the plurality of AD sensors is configured to, based upon collected AD data, detect an AD emergency event. In response to the detection, the first AD sensor is configured to transmit an AD emergency message on the TDM bus in a non-assigned time slot and at a second power level that exceeds the first power level. The AD sensor may transmit the AD emergency message in a particular sub-slot of the non-assigned time slot.
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- 1. A vehicular autonomous driving system comprising:
a time division multiplexed (TDM) bus; an autonomous driving controller coupled to the TDM bus; a plurality of autonomous driving sensors coupled to the TDM bus and configured to:
collect autonomous driving data; and
transmit collected autonomous driving data to the autonomous driving controller on the TDM bus in an assigned time slot at a first power level; and
a first autonomous driving sensor of the plurality of autonomous driving sensors configured to:
based upon collected autonomous driving data, detect an autonomous driving emergency event; and
in response to a detected autonomous driving emergency event, transmit an autonomous driving emergency message on the TDM bus in a non-assigned time slot and at a second power level that exceeds the first power level.
- 7. An autonomous driving sensor comprising:
a data collection component configured to collect autonomous driving data; processing circuitry; memory; and a transceiver coupled to the processing circuitry and configured to communicate with an autonomous driving controller via a time division multiplexed (TDM) bus, wherein the processing circuitry and the transceiver are configured to:
transmit first autonomous driving data to the autonomous driving controller on the TDM bus in at least one assigned time slot at a first power level;
detect an autonomous driving emergency event based upon at least second collected autonomous driving data; and
in response to the detected autonomous driving emergency event, transmit an autonomous driving emergency message on the TDM bus in a non-assigned time slot and at a second power level that exceeds the first power level.
- 12. An autonomous driving controller comprising:
processing circuitry; memory; and a transceiver coupled to at least the processing circuitry and configured to communicate with a plurality of autonomous driving sensors via a time division multiplexed (TDM) bus, wherein the processing circuitry and the transceiver are configured to:
assign TDM bus time slots to the plurality of autonomous driving sensors;
direct the plurality of autonomous driving sensors to transmit data in assigned time slots;
receive first autonomous driving data from the plurality of autonomous driving sensors transmit data in assigned time slots at a first power level;
detect an autonomous driving emergency message at a second power level that exceeds the first power level; and
receive the autonomous driving emergency message.
- 17. A method of operating an autonomous driving controller comprising:
communicating with a plurality of autonomous driving sensors via a time division multiplexed (TDM) bus; assigning TDM bus time slots to the plurality of autonomous driving sensors; directing the plurality of autonomous driving sensors to transmit data in assigned time slots; receiving first autonomous driving data from the plurality of autonomous driving sensors transmit data in assigned time slots at a first power level; detecting an autonomous driving emergency message at a second power level that exceeds the first power level; and receiving the autonomous driving emergency message.
