Method and apparatus for simulation, and a computer product

• US 20010051861A1
• Filed: 12/29/2000
• Published: 12/13/2001
• Est. Priority Date: 06/09/2000
• Status: Abandoned Application

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Ishibashi, Koji, Tamura, Naohiro
• Application Number:
  US09/751,889
• Publication Number:
  US 20010051861A1
• Time in Patent Office: Days
• US Class Current: 703/13
• CPC Class Codes: G06F 30/20 Design optimisation, verification or simulation optimisation, verification or simulation of circuit designs G06F30/30

Abstract

A simulator includes a model generation/management section that generates and manages a model corresponding to a system to be simulated; a scenario generation/management section that prepares a future-forecasting scenario for verifying a state that the system does not satisfy a predetermined performance standard in future, and at the same time, prepares a design-supporting scenario for verifying a state that the system satisfies the predetermined performance standard; a simulation engine that executes a simulation corresponding to the future-forecasting scenario or the design-supporting scenario; and a simulation control section that controls a simulation corresponding to the design-supporting scenario or the future-forecasting scenario based on a result of a simulation of the future-forecasting scenario or the design-supporting scenario.

Claims

1. A simulator comprising:

a model preparation unit that prepares a model corresponding to a system to be simulated;

a future-forecasting scenario preparation unit that prepares a future-forecasting scenario for verifying a state that said system does not satisfy a predetermined performance standard in future, based on a result of executing a simulation of the model;

a design-supporting scenario preparation unit that prepares a design-supporting scenario for verifying a state that said system satisfies a performance standard, based on a result of executing a simulation of the model;

a simulation execution unit that executes a simulation corresponding to the future-forecasting scenario or the design-supporting scenario; and

a simulation control unit that makes said simulation execution unit execute a simulation corresponding to the design-supporting scenario or the future-forecasting scenario, based on a result of the simulation of the future-forecasting scenario or the design-supporting scenario.

2. The simulator according to

claim 1

, wherein said simulation control unit controls the sequence of executing a simulation by utilizing a mutually dependent relationship between the future-forecasting scenario and the design-supporting scenario.

3. The simulator according to

claim 1

, wherein said system includes a network to which many network devices are connected.

4. The simulator according to

claim 3

, wherein said future-forecasting scenario preparation unit prepares the future-forecasting scenario by setting a topology and a service rate as constants and setting a qualitative arrival rate and a quantitative arrival rate as variables among parameters of said network and said network devices.

5. The simulator according to

claim 3

, wherein said design-supporting scenario preparation unit prepares the design-supporting scenario by setting a qualitative arrival rate and a quantitative arrival rate as constants and setting a topology and a service rate as variables among parameters of said network and said network devices.

6. The simulator according to

claim 2

, wherein said system includes a network to which many network devices are connected.

7. The simulator according to

claim 6

, wherein said future-forecasting scenario preparation unit prepares the future-forecasting scenario by setting a topology and a service rate as constants and setting a qualitative arrival rate and a quantitative arrival rate as variables among parameters of said network and said network devices.

8. The simulator according to

claim 6

, wherein said design-supporting scenario preparation unit prepares the design-supporting scenario by setting a qualitative arrival rate and a quantitative arrival rate as constants and setting a topology and a service rate as variables among parameters of said network and said network devices.

9. A simulation method comprising the steps of:

preparing a model corresponding to a system to be simulated;

preparing a future-forecasting scenario for verifying a state that said system does not satisfy a predetermined performance standard in future, based on a result of executing a simulation of the model;

preparing a design-supporting scenario for verifying a state that said system satisfies a performance standard, based on a result of executing a simulation of the model;

executing a simulation corresponding to the future-forecasting scenario or the design-supporting scenario; and

making a simulation corresponding to the design-supporting scenario or the future-forecasting scenario to be executed at the simulation execution step, based on a result of the simulation of the future-forecasting scenario or the design-supporting scenario.

10. The simulation method according to

claim 9

, wherein at the simulation control step, the sequence of executing a simulation is controlled by utilizing a mutually dependent relationship between the future-forecasting scenario and the design-supporting scenario.

11. The simulation method according to

claim 9

, wherein said system includes a network to which many network devices are connected.

12. The simulation method according to

claim 10

, wherein said system includes a network to which many network devices are connected.

13. A computer-readable recording medium which records a computer program that includes instruction which when executed on a computer causes the computer to perform the steps of:

preparing a model corresponding to a system to be simulated;

preparing a future-forecasting scenario for verifying a state that said system does not satisfy a predetermined performance standard in future, based on a result of executing a simulation of the model;

preparing a design-supporting scenario for verifying a state that said system satisfies a performance standard, based on a result of executing a simulation of the model;

executing a simulation corresponding to the future-forecasting scenario or the design-supporting scenario; and

making a simulation corresponding to the design-supporting scenario or the future-forecasting scenario to be executed at the simulation execution step, based on a result of the simulation of the future-forecasting scenario or the design-supporting scenario.

14. A computer-readable recording medium which records a computer program that includes instruction which when executed on a computer causes the computer to perform the steps of:

preparing a model corresponding to a system to be simulated;

preparing a future-forecasting scenario for verifying a state that said system does not satisfy a predetermined performance standard in future, based on a result of executing a simulation of the model;

preparing a design-supporting scenario for verifying a state that said system satisfies a performance standard, based on a result of executing a simulation of the model;

executing a simulation corresponding to the future-forecasting scenario or the design-supporting scenario; and

making a simulation corresponding to the design-supporting scenario or the future-forecasting scenario to be executed at the simulation execution step, based on a result of the simulation of the future-forecasting scenario or the design-supporting scenario,

wherein at the simulation control step, the sequence of executing a simulation is controlled by utilizing a mutually dependent relationship between the future-forecasting scenario and the design-supporting scenario.

15. A computer-readable recording medium which records a computer program that includes instruction which when executed on a computer causes the computer to perform the steps of:

preparing a model corresponding to a system to be simulated;

preparing a future-forecasting scenario for verifying a state that said system does not satisfy a predetermined performance standard in future, based on a result of executing a simulation of the model;

preparing a design-supporting scenario for verifying a state that said system satisfies a performance standard, based on a result of executing a simulation of the model;

executing a simulation corresponding to the future-forecasting scenario or the design-supporting scenario; and

making a simulation corresponding to the design-supporting scenario or the future-forecasting scenario to be executed at the simulation execution step, based on a result of the simulation of the future-forecasting scenario or the design-supporting scenario,

wherein said system includes a network to which many network devices are connected.

16. A computer-readable recording medium which records a computer program that includes instruction which when executed on a computer causes the computer to perform the steps of:

preparing a model corresponding to a system to be simulated;

preparing a future-forecasting scenario for verifying a state that said system does not satisfy a predetermined performance standard in future, based on a result of executing a simulation of the model;

preparing a design-supporting scenario for verifying a state that said system satisfies a performance standard, based on a result of executing a simulation of the model;

executing a simulation corresponding to the future-forecasting scenario or the design-supporting scenario; and

making a simulation corresponding to the design-supporting scenario or the future-forecasting scenario to be executed at the simulation execution step, based on a result of the simulation of the future-forecasting scenario or the design-supporting scenario,

wherein at the simulation control step, the sequence of executing a simulation is controlled by utilizing a mutually dependent relationship between the future-forecasting scenario and the design-supporting scenario,

wherein said system includes a network to which many network devices are connected.