Wireless terminal positioning system, method of positioning wireless terminal, environment measurement system, facility management system, method of measuring environment, and method of deciding destination of wireless mobile terminal
First Claim
1. A wireless terminal positioning system including a plurality of wireless terminals and a positioning management terminal that manages positioning of the plurality of wireless terminals, whereinthe positioning management terminal includes:
- a positioning object decision section that selects a terminal to be positioned which is a positioning object and a plurality of positioning standard terminals whose positions are known, from among the plurality of wireless terminals;
a positioning management section that requests distances between the terminal to be positioned and the positioning standard terminals;
a position calculation section that calculates a target position of the terminal to be positioned; and
a storage section that keeps a wireless terminal list that includes terminal addresses of the plurality of wireless terminals and positions thereof and an adjacent terminal list of adjacent terminals to which wireless signals from each of the plurality of wireless terminals reach,each of the plurality of wireless terminals includes;
a distance measurement section that measures the distances from adjacent terminals that wireless signals of the wireless terminal reach;
a communication section that transmits measurement results of the distance measurement section to the positioning management terminal, andan adjacent terminal search section that searches the adjacent terminals that wireless signals reach; and
whereinthe positioning management section requests the adjacent terminal list of each of the plurality of wireless terminals,the adjacent terminal search section searches the adjacent terminals of the relevant wireless terminal based on the request for resultant adjacent terminal list to the positioning management terminal,the positioning object decision section selects a terminal whose position has not been defined and that has a predetermined number of the adjacent terminals or more whose positions have been defined in the corresponding adjacent terminal list as the terminal to be positioned,the positioning management section requests distances from the positioning standard terminals selected by the positioning object decision section to the terminal to be positioned selected by the positioning object decision section, andthe position calculation section calculates the target position of the terminal to be positioned using the distances and reference positions of the positioning standard terminals.
1 Assignment
0 Petitions
Accused Products
Abstract
To obtain a method of positioning a wireless terminal capable of obtaining the position of each communication terminal by measuring distances with installed communication terminals each other without fixedly installing a base station.
A positioning management terminal 100 includes a positioning object decision section 130 that selects a terminal to be positioned, which is a positioning object, and a positioning standard terminal, whose position is known, among the wireless terminals 200; a positioning management section 120 that requires distance information between the terminal to be positioned and the positioning standard terminal; and a position calculation section 140 that calculates the position of the terminal to be positioned. The positioning management section 120 requires distance information from the positioning standard terminal selected by the positioning object decision section 130 to the terminal to be positioned selected by the positioning object decision section 130. The position calculation section 140 calculates the position of the terminal to be positioned using the distance information and position information of the positioning standard terminal.
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Citations
13 Claims
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1. A wireless terminal positioning system including a plurality of wireless terminals and a positioning management terminal that manages positioning of the plurality of wireless terminals, wherein
the positioning management terminal includes: -
a positioning object decision section that selects a terminal to be positioned which is a positioning object and a plurality of positioning standard terminals whose positions are known, from among the plurality of wireless terminals; a positioning management section that requests distances between the terminal to be positioned and the positioning standard terminals; a position calculation section that calculates a target position of the terminal to be positioned; and a storage section that keeps a wireless terminal list that includes terminal addresses of the plurality of wireless terminals and positions thereof and an adjacent terminal list of adjacent terminals to which wireless signals from each of the plurality of wireless terminals reach, each of the plurality of wireless terminals includes; a distance measurement section that measures the distances from adjacent terminals that wireless signals of the wireless terminal reach; a communication section that transmits measurement results of the distance measurement section to the positioning management terminal, and an adjacent terminal search section that searches the adjacent terminals that wireless signals reach; and wherein the positioning management section requests the adjacent terminal list of each of the plurality of wireless terminals, the adjacent terminal search section searches the adjacent terminals of the relevant wireless terminal based on the request for resultant adjacent terminal list to the positioning management terminal, the positioning object decision section selects a terminal whose position has not been defined and that has a predetermined number of the adjacent terminals or more whose positions have been defined in the corresponding adjacent terminal list as the terminal to be positioned, the positioning management section requests distances from the positioning standard terminals selected by the positioning object decision section to the terminal to be positioned selected by the positioning object decision section, and the position calculation section calculates the target position of the terminal to be positioned using the distances and reference positions of the positioning standard terminals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification