Simulation system, simulation apparatus, and simulation method

• US 8,639,255 B2
• Filed: 05/09/2011
• Issued: 01/28/2014
• Est. Priority Date: 07/28/2010
• Status: Expired due to Fees

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Inaba, Takeshi
• Primary Examiner(s): Wendell, Andrew
• Assistant Examiner(s): TRANDAI, CINDY HUYEN
• Application Number:
  US13/103,909
• Publication Number:
  US 20120028586A1
• Time in Patent Office: 995 Days
• Field of Search: 455/456.1, 455/456.5, 455/67.11, 455/446, 455/423, 455/412.2
• US Class Current: 455/446
• CPC Class Codes: H04B 17/3912 Simulation models, e.g. distribution of spectral power density or received signal strength indicator [RSSI] for a given geographic region

Abstract

A simulation apparatus according to the present invention performs propagation simulation regarding the radio wave quality of a base station radio wave in a specific area. The apparatus includes: a receiving unit configured to receive, from a plurality of mobile terminals existing in the specific area, measured results of the radio wave quality of a base station radio wave from a base station around the mobile terminal, the field intensity of a GPS wave from a GPS satellite, and a position of the mobile terminal; and a simulating unit configured to identify a mobile terminal having the measured result of the field intensity at or above a predetermined value from the plurality of mobile terminals and correct a propagation equation used for the propagation simulation using the measured result of the radio wave quality at the position of the identified mobile terminal for performing the propagation simulation.

Claims

1. A simulation system comprising:

a simulation apparatus configured to perform propagation simulation regarding radio wave quality of a base station radio wave in a specific area; and

a plurality of individual mobile terminals existing in the specific area, each of said plurality of individual mobile terminals including;

a first measuring unit configured to receive the base station radio wave from a base station around said individual mobile terminal and measure the radio wave quality of the received base station radio wave;

a second measuring unit configured to receive a GPS wave from a GPS satellite and measure field intensity of the received GPS wave;

a third measuring unit configured to measure a position of said individual mobile terminal based on the GPS wave; and

a transmitting unit configured to send measured results of the radio wave quality, the field intensity, and the position of said individual mobile terminal measured at said first to third measuring units to said simulation apparatus,

said simulation apparatus including;

a receiving unit configured to receive the measured results of the radio wave quality, the field intensity, and the position of said individual mobile terminal from each of said plurality of individual mobile terminals; and

a simulating unit configured to identify an individual mobile terminal having the measured result of the field intensity at or above a predetermined value from said plurality of individual mobile terminals and correct a propagation equation used for the propagation simulation using the measured result of the radio wave quality at the position of said identified mobile terminal for performing the propagation simulation.

2. The simulation system according to claim 1, wherein said first measuring unit measures field intensity of the base station radio wave, propagation loss, or a power density to noise power density ratio per bit, for the radio wave quality of the base station radio wave.

3. The simulation system according to claim 1, wherein said simulating unit considers a constant or a factor of the propagation equation to be a variable, calculates a value of the variable for each measured result of the radio wave quality measured by each of said plurality of individual mobile terminals, determines the value of the variable from the calculated result of each measured result, replaces the constant or factor considered to be the variable by the determined value, and corrects the propagation equation.

4. The simulation system according to claim 2, wherein said simulating unit considers a constant or a factor of the propagation equation to be a variable, calculates a value of the variable for each measured result of the radio wave quality measured by each of said plurality of individual mobile terminals, determines the value of the variable from the calculated result of each measured result, replaces the constant or factor considered to be the variable by the determined value, and corrects the propagation equation.

5. A simulation apparatus configured to perform propagation simulation regarding radio wave quality of a base station radio wave in a specific area, the apparatus comprising:

a receiving unit configured to receive, from a plurality of individual mobile terminals existing in the specific area, measured results of radio wave quality of a base station radio wave from a base station around said individual mobile terminal, field intensity of a GPS wave from a GPS satellite, and a position of said individual mobile terminal; and

a simulating unit configured to identify an individual mobile terminal having the measured result of the field intensity at or above a predetermined value from said plurality of individual mobile terminals and correct a propagation equation used for the propagation simulation using the measured result of the radio wave quality at the position of said identified mobile terminal for performing the propagation simulation.

6. The simulation apparatus according to claim 5, wherein the radio wave quality of the base station radio wave refers to field intensity, propagation loss, or a power density to noise power density ratio per bit of the base station radio wave.

7. The simulation apparatus according to claim 6, wherein said simulating unit considers a constant or a factor of the propagation equation to be a variable, calculates a value of the variable for each measured result of the radio wave quality measured by each of said plurality of individual mobile terminals, determines the value of the variable from the calculated result of each measured result, replaces the constant or factor considered to be the variable by the determined value, and corrects the propagation equation.

8. The simulation apparatus according to claim 6, wherein said simulating unit considers a constant or a factor of the propagation equation to be a variable, calculates a value of the variable for each measured result of the radio wave quality measured by each of said plurality of individual mobile terminals, determines the value of the variable from the calculated result of each measured result, replaces the constant or factor considered to be the variable by the determined value, and corrects the propagation equation.

9. A simulation method adapted to a simulation apparatus configured to perform propagation simulation regarding radio wave quality of a base station radio wave in a specific area, the method comprising:

receiving, from a plurality of individual mobile terminals existing in the specific area, measured results of radio wave quality of a base station radio wave from a base station around said individual mobile terminal, field intensity of a GPS wave from a GPS satellite, and a position of said individual mobile terminal; and

identifying an individual mobile terminal having the measured result of the field intensity at or above a predetermined value from said plurality of individual mobile terminals and correcting a propagation equation used for the propagation simulation using the measured result of the radio wave quality at the position of said identified mobile terminal for performing the propagation simulation.

10. The simulation method according to claim 9, wherein the radio wave quality of the base station radio wave refers to field intensity, propagation loss, or a power density to noise power density ratio per bit of the base station radio wave.

11. The simulation method according to claim 9, wherein a constant or a factor of the propagation equation is considered to be a variable, a value of the variable for each measured result of the radio wave quality measured by each of said plurality of individual mobile terminals is calculated, the value of the variable from the calculated result of each measured result is determined, the constant or factor considered to be the variable by the determined value is replaced, and correcting the propagation equation.

12. The simulation method according to claim 10, wherein a constant or a factor of the propagation equation is considered to be a variable, a value of the variable for each measured result of the radio wave quality measured by each of said plurality of individual mobile terminals is calculated, the value of the variable from the calculated result of each measured result is determined, the constant or factor considered to be the variable by the determined value is replaced, and correcting the propagation equation.