SIMULATION DEVICE, SIMULATION METHOD, AND RECORDING MEDIUM STORING SIMULATION PROGRAM

• US 20120095740A1
• Filed: 12/27/2011
• Published: 04/19/2012
• Est. Priority Date: 06/30/2009
• Status: Abandoned Application

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: KITAGAWA, Eiji, Ikeda, Takuro, Yamada, Hiroshi
• Application Number:
  US13/337,792
• Publication Number:
  US 20120095740A1
• Time in Patent Office: Days
• US Class Current: 703/6
• CPC Class Codes: G06Q 10/04 Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem" market predictions or forecasting for commercial activities G06Q30/0202
• CPC Class Codes: G08G 1/0112 from the vehicle, e.g. floating car data [FCD]

Abstract

A simulation device is accessible to a recording unit in which simulation data including status data and environmental data is recorded. The simulation device comprises: a plurality of status updaters to refer to the simulation data, and to execute a process of hierarchies into which a status updating process updating the status data is divided, the plurality of status updaters, in accordance with reference range information, referring to simulation data and updating the status data of the movable body for each of the hierarchies; and a drive decision unit to instruct the status updaters to update the status data according to update control information.

Claims

1. A simulation device which simulates motion of at least one movable body, the simulation device being accessible to a recording unit which records simulation data which includes status data representing a respective status of the movable body and environmental data representing information on a possible factor in changing the status of the movable body, the simulation device comprising:

a plurality of status updaters to refer to the simulation data, and to execute a process of hierarchies into which a status updating process updating the status according to the referred to simulation data data is divided, the plurality of status updaters, in accordance with reference range information which is preliminarily recorded for each of the hierarchies and which indicates a reference range of the simulation data, referring to simulation data of the reference range and updating the status data of the movable body for each of the hierarchies; and

a drive decision unit to instruct the plurality of status updaters having the hierarchies to update the status data, the drive decision unit instructing the plurality of status updaters to update the status data according to update control information in which a timing of updating the status data is defined for each of the status updaters at a timing defined in the update control information.

2. The simulation device according to claim 1, wherein

the timing of an update indicated by the update control information is defined according to a range of the simulation data indicated by the reference range information.

3. The simulation device according to claim 1, wherein

the update control information includes a cycle in which the status updaters refer to the simulation data, and

the cycle in which the status updaters refer to the simulation data becomes longer as a range of the simulation data indicated by the reference range information becomes wider.

4. The simulation device according to claim 1, wherein

the status data is associated with the movable body, and the environmental data is recorded in association with the position information indicating the position at which a factor exists,

the range of the simulation data is indicated by an area with reference to the position at which the movable body exists, and

the status updaters refer to the status data of the movable body existing in the area and the environmental data of the factor existing in the area.

5. The simulation device according to claim 1, wherein

the timing of updating indicated by the update control information is defined by condition data which indicates a condition of starting an update, and

the drive decision unit detects an event caused in a simulation, and when the detected event satisfies a condition indicated in the condition data, instructs the status updater to execute an update.

6. The simulation device according to claim 1, wherein

the status updaters vary a range of the simulation data indicated by the reference range information depending on the timing of updating of each of the status updaters in the update control information and a velocity of the movable body.

7. The simulation device according to claim 1, wherein

the movable body is a vehicle moving within a space or on a plane, and

the plurality of status updaters includes at least

a first-hierarchy status updater to refer to the environmental data, which includes information of a path connection in a first area, including a position of the vehicle, and to update at least a route from a current position of the vehicle to a destination,

a second-hierarchy status updater to refer to the status data of other vehicles in a second area, including the position of the vehicle, and to update at least a lane in which the vehicle is traveling, and

a third-hierarchy status updater to refer to the status data of other vehicles in a third area, including the position of the vehicle, and to update at least velocity, a direction, and a position of the vehicle, and

the first area, the second area, and the third area have different sizes in a decremental order.

8. The simulation device according to claim 1, wherein

the movable body is a person moving in a space or on a plane, and

the plurality of status updaters includes at least

a first-hierarchy status updater to refer to the environmental data, which includes information of a path connection in a first area, and to update at least a route from a current position of the person to a destination,

a second-hierarchy status updater to refer to the status data of other people in a second area, and to update at least a direction in which the person is traveling, and

a third-hierarchy status updater to refer to the environmental data in a third area, including information of a presented item or equipment provided for a facility, and to update an amount of movement of the person, and

the first area, the second area, and the third area have different sizes in a decremental order.

9. A non-transitory computer readable medium storing simulation program executed by a computer to simulate motion of at least one movable body, the simulation program comprising:

a plurality of status updating processes to refer to simulation data which includes status data representing a respective status of the movable body and environmental data representing information on a possible factor in changing the status of the movable body, and to execute each process of hierarchies into which a status updating process updating the status data is divided according to the referred to simulation data, the plurality of status updating processes, in accordance with reference range information which is preliminarily recorded for each of the hierarchies and which indicates a reference range of the simulation data, referring to simulation data of the reference range and updating the status data of the movable body for each of the hierarchies; and

a drive decision process to control a timing of the plurality of status updating processes having the hierarchies, the drive decision process initiating an information updating process of the hierarchies according to update control information in which a timing of updating the status data is defined for each of the hierarchies at a timing defined in the update control information.

10. A simulation method in which a computer simulates motion of at least one movable body, the simulation method comprising:

a plurality of status updating steps in which the computer refers to simulation data which includes status data representing a respective status of the movable body and environmental data representing information on a possible factor in changing the status of the movable body, and executes each process of hierarchies into which a status updating process updating the status data is divided according to the referred to simulation data, the plurality of status updating steps, in accordance with reference range information which is preliminarily recorded for each of the hierarchies and which indicates a reference range of the simulation data, referring to simulation data of the reference range and updating the status data of the movable body for each of the hierarchies; and

a drive decision step in which the computer controls a timing of the plurality of status updating processes having the hierarchies, the drive decision step initiating an information updating process of the hierarchies according to update control information in which a timing of updating the status data is defined for each of the hierarchies at a timing defined in the update control information.