Devices and methods for updating maps in autonomous driving systems in bandwidth constrained networks
Vehicle navigation control systems in autonomous driving rely on the accuracy of maps which include features about a vehicle's environment so that a vehicle may safely navigate through its surrounding area. Accordingly, this disclosure provides methods and devices which implement mechanisms for communicating features observed about a vehicle's environment for use in updating maps so as to provide vehicles with accurate and “real-time” features of its surroundings while taking network resources, such as available frequency-time resources, into consideration.
1. A communication device for a vehicle to communicate features about the vehicle's environment, the communication device comprising one or more processors configured to:
estimate a number of other vehicles competing for an available bandwidth;
divide stored data about the vehicle's environment into a plurality of subsets of data based on the number of other vehicles and the available bandwidth, wherein a respective amount of data in each of the plurality of subsets is less than the amount of stored data; and
select one or more subsets from the plurality of subsets for transmission.
2. The communication device of claim 1 , wherein the stored data comprises data collected from one or more of data acquisition devices of the vehicle.
3. The communication device of claim 2 , wherein the one or more data acquisition devices of the vehicle comprises one or more of an image acquisition device, a proximity detector, or an acoustic sensor.
4. The communication device of claim 3 , wherein the one or more acoustic sensors comprise at least one of a microphone, sonar sensor, or ultrasonic sensor.
5. The communication device of claim 1 , the one or more processors configured to tag the stored data with metadata, wherein the metadata comprises at least one of a temporal metadata or a location metadata.
6. The communication device of claim 1 , wherein estimating the number of other vehicles competing for an available bandwidth comprises transmitting a query to a network infrastructure element and receiving a response with information for estimating the number of other vehicles competing for an available bandwidth.
7. The communication device of claim 1 , wherein estimating the number of other vehicles competing for an available bandwidth comprises transmitting a query to at least one of the other vehicles and receiving a response with information for estimating the number of other vehicles competing for an available bandwidth.
8. The communication device of claim 1 , wherein estimating the number of other vehicles competing for an available bandwidth comprises the vehicle estimating the number of other vehicles based on at least one of a token, node area density, communication channel status, or data collected about the vehicle's environment.
9. The communication device of claim 1 , wherein the selection of the one or more subsets is random.
10. The communication device of claim 1 , the one or more processors further configured to rank the stored data depending on an identified feature type.
11. The communication device of claim 10 , the one or more processors configured to increase a likelihood of selecting one or more subsets including higher ranked features of the collected data for transmission.
12. The communication device of claim 1 , wherein determining the available bandwidth is based on a radio access technology used by the vehicle.