Method and apparatus for managing dynamic vehicle data recording data by

Abstract

A method and system relating to management of dynamic vehicle data from data sources that produce data entries that have both type and latency and are possibly periodic. Data sources produce data entries that are entered into a fixed interval data storage structure that has positions related to times. Data entries are entered into the storage structure at a position represented by the position of the current time minus the known latency of the data source. The position in the structure representing the current time is updated at predetermined times so that the structure represents a historical record in real time. Data clients receive notification of availability of data and request retrievals from the fixed interval storage structure of either current or historical data entries. When a current entry of a given data type is requested, the system returns the most recent data of that type stored. When historical data is requested, the system returns the first data entry of that type before the position in the structure to that representing the historical time requested. Fixed times can be marked in the structure by clients, and data can be retrieved relative to these marked locations. Data sources receive notification of the need to acquire new measurements or terminate acquisition of measurements as requested by data clients.