Compression Algorithms for Vehicle-Bus-Messaging of Preview Data

摘要

Disclosures teach providing data over a vehicle bus, data providing values for a road attribute indexed to points anticipated to be traversed by a vehicle. To compress the data, a server may fit a regression function to the data with coefficients applied to kernels in the function. The server may limit the number of coefficients to reflect a limitation on rate of change imposed on data by the road on which it reports. Similarly, the server may limit one or more numbers of bits encoding the coefficients in a message transmitted on the vehicle bus, reflective of a limited range of potential amplitudes for data imposed by the road. A client may maintain a copy of the kernels and retrieve the coefficients from the message. The client may estimate future values of the road attribute by evaluating the coefficients applied to the kernels, which may, in some examples, be Gaussian.

主权项

1. A system for communicating data to a vehicle control system, comprising:
a vehicle bus provided within a vehicle and operable to provide message-based communication to a set of control systems for the vehicle; a server-side module, communicatively coupled to the vehicle bus, operable to:
acquire path-preview data indexed to values of a metric for vehicle progress;perform regression analysis on the path-preview data to generate a set of coefficients assigned to sub-functions combined in an approximation function characterizing variation in the path-preview data relative to the values indexed;transmit the coefficients by messaging on the vehicle bus; a client-side module, communicatively coupled to the vehicle bus, operable to:
receive the messaging from the vehicle bus;extract the set of coefficients from the messaging;evaluate the approximation function at the client-side module by applying the set of coefficients to a copy of the sub-functions maintained at the client-side module;utilize an evaluation of the approximation function to direct a control system.