Probe data collection method and probe data collection device
AssigneeNissan Motor Co., Ltd.
InventorMasahide Nakamura
Life of this patent
Estimating the term…
Abstract
A probe data collection method is provided to ensure real-time nature of collected probe data and to reduce a communication load of the server. Based on received probe data, a total number of vehicles that have transmitted probe data and upload times of the probe data for each vehicle are detected. Based on the detected upload times, correction values of the upload times are calculated for each of the vehicle according to the total number of the vehicles. Then, the calculated correction values are transmitted to the vehicles.
Claims7
A probe data collection method for a probe data management system having a server that receives probe data transmitted from vehicles, and a database that stores the probe data received by the server, the probe data collection method comprising:
- the server
- detecting a total number of the vehicles that transmitted the probe data and upload times of the probe data for each of the vehicles based on the probe data received,
- calculating correction values of the upload times corresponding to the total number of the vehicles based on the upload times detected for each of the vehicles,
- carrying out thinning correction, when calculating the correction values, for reducing a number of pieces of the probe data received by the server during a predetermined period upon detecting the total number of the vehicles being equal to or greater than a predetermined value that is set in advance,
- carrying out an equalization correction, when calculating the correction values, whereby the upload times are offset without changing upload intervals of the probe data upon detecting the total number of the vehicles being less than the predetermined value, and
- transmitting the correction values calculated to the vehicles respectively.
A probe data collection device in a probe data management system, the probe data collection device comprising:
- a server that receives probe data transmitted from vehicles;
- and
- a database that stores the probe data received by the server,
- the server comprising a probe data collection controller which
- detects a total number of the vehicles that transmitted the probe data, and upload times of the probe data for each of the vehicles based on the received probe data,
- calculates correction values of the upload times corresponding to the total number of the vehicles based on the upload times detected for each of the vehicles,
- carries out thinning correction, when calculating the correction values, for reducing a number of pieces of the probe data received by the server during a predetermined period upon detecting the total number of the vehicles being equal to or greater than a predetermined value that is set in advance,
- carries out an equalization correction, when calculating the correction values, whereby the upload times are offset without changing upload intervals of the probe data upon detecting the total number of the vehicles being less than the predetermined value, and
- transmits the correction values calculated to the vehicles, respectively.
Dependencies are inferred from the claim text.