JP2006010634A - Positioning environment information generating device, positioning environment information generation method, control program of positioning environment information generating device, and computer readable recording medium with the control program stored thereon - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a positioning environment information generating device, or the like for providing information also on obstacles other than the message failure of satellite radio waves without requiring any aerial photographs. <P>SOLUTION: The positioning environment information generating device 20 comprises: route information; map information including structure information; a target range route information generating means for generating target range route information for indicating a target range route that is a route in a positioning environment information generation range, based on the route information and the positioning environment information generation range information; a positioning obstacle information generating means for generating positioning obstacle information by extracting a positioning obstacle that is a structure that becomes a positioning obstacle in a target range route, based on the structure information and the target range route information; and a positioning environment information generating means, and the like for generating positioning environment information for indicating the positioning environment of a positioning terminal 16 in the target range route, based on the positioning obstacle information. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a positioning environment information generating device, a positioning environment information generating method, a positioning environment information generating device control program, and a computer readable recording medium storing a positioning environment information generating device control program.

2. Description of the Related Art Conventionally, a positioning system that measures the current position of a GPS receiver using, for example, a GPS (Global Positioning System), which is a satellite navigation system that uses a position information satellite, has been put into practical use. However, in a place where the signal strength of the signal from the GPS satellite is low, a positioning failure that the current position cannot be measured may occur. In addition, for example, as a result of a signal from a GPS satellite being reflected on a building and reaching a GPS receiver, a positioning failure in which an error in the positioning result at the current position becomes large (so-called multipath) may occur.
Here, if the GSP receiver has previously acquired information on the above-mentioned positioning failure, in such a place, for example, control such as stopping driving is performed to avoid unnecessary power consumption. Etc.
In this regard, in order to clarify the region where the signal from the GPS satellite does not reach, a satellite line-of-sight map creation method for calculating the line-of-sight area from the GPS satellite using aerial photographs has been proposed (for example, Patent Document 1). ).
JP-A-5-46077 (FIG. 1 etc.)

  However, in the prior art, an aerial photograph is required to calculate a line-of-sight area from a GPS satellite, and thus aerial photograph costs are required. In addition, it is possible to know the area where the signal from the GPS satellite does not reach from the satellite line-of-sight map, but the positioning failure by the GPS receiver is not limited to the signal from the GPS satellite reaching, for example, so-called multipath There are also problems, and the prior art may not be able to solve such problems.

  Therefore, the present invention does not require an aerial photograph, and can provide information on a failure other than non-arrival of satellite radio waves, a positioning environment information generation device, a positioning environment information generation method, and a control program for a positioning environment information generation device It is another object of the present invention to provide a computer-readable recording medium storing a control program for a positioning environment information generating apparatus.

  According to the first aspect of the present invention, there is provided a positioning environment information generating device for generating positioning environment information for providing a positioning terminal for positioning a current position based on a position related signal from a position information satellite, The positioning environment information generating device includes: route information indicating a route; map information storage means for storing map information including environment constituent information indicating an environmental constituent; and the positioning environment information in an area indicated by the map information Positioning environment information generation range information generating means for generating positioning environment information generation range information indicating a range to be generated, and based on the route information and the positioning environment information generation range information in the positioning environment information generation range Based on the target range route information generating means for generating target range route information indicating the target range route which is the route, the environmental component information and the target range route information, Positioning obstacle information generating means for generating positioning obstacle information by extracting a positioning obstacle that is the environmental component that becomes an obstacle of positioning in an elephant range path, and the target range based on the positioning obstacle information It is achieved by a positioning environment information generating device characterized by comprising positioning environment information generating means for generating positioning environment information indicating the positioning environment of the positioning terminal on the route.

According to the configuration of the first invention, the positioning environment information generation device generates positioning environment information generation range information indicating a range in which the positioning environment information is generated in the area indicated by the map information. Here, the map information need not be generated by an aerial photograph.
Then, the positioning environment information generation device generates positioning obstacle information by extracting a positioning obstacle that is an environmental component that becomes an obstacle to the positioning in the target range route that is the route of the positioning environment information generation range. . Here, the environmental component means anything that can affect the position-related signal from the position information satellite. This means everything that affects the positioning environment when viewed from the positioning terminal. The environmental constituents include, for example, buildings such as buildings and houses, structures such as tunnels and bridges, and natural objects such as mountains and rivers. Among these environmental components, there are those (positioning obstacles) that become obstacles to positioning of the positioning terminal.
The positioning obstacle is not limited to the cause of non-reaching of the position-related signal from the position information satellite. For example, the position-related signal is reflected by the environmental component and reaches the positioning terminal. Including those that cause trouble such as multipath.
Then, the positioning environment information generation device can generate positioning environment information indicating a positioning environment of the positioning terminal in the target range route based on the positioning obstacle information.
Accordingly, it is possible to provide the positioning environment information generation device that does not require an aerial photograph and can also provide information about a failure other than the non-arrival of satellite radio waves.

  According to a second invention, in the configuration of the first invention, there is a positioning obstacle detailed information storage means for storing detailed information of the positioning obstacle, and the positioning obstacle information generation means is provided for each positioning obstacle. The positioning obstacle information including the corresponding positioning obstacle detailed information is generated.

For example, a tunnel that is a positioning obstacle is generally difficult to receive the position-related signal from the position information satellite inside the tunnel. However, whether or not the tunnel can receive the position-related signal from the position information satellite differs depending on the length of the tunnel. Therefore, in order to reliably determine whether or not the positioning terminal is an obstacle to positioning, detailed information such as the length of the tunnel is required in addition to the information indicating that the tunnel is merely a tunnel.
In this regard, according to the configuration of the second invention, the positioning obstacle information generation means is, for example, the positioning obstacle detailed information corresponding to the tunnel indicated in the positioning obstacle information. The positioning obstacle information including information that the height is 70 meters (m) is generated.
For this reason, it can be determined reliably whether it becomes the positioning obstacle of the positioning terminal.

  According to a third invention, in the configuration of the first invention or the second invention, the positioning environment information can be received by the positioning terminal with a signal strength at which a position-related signal from the position information satellite can be measured. Receivability information indicating the possibility is included.

  According to the configuration of the third invention, the environment information generating device can generate the positioning environment information including the receivability information.

  According to a fourth aspect of the present invention, in the configuration according to any one of the first to third aspects of the invention, the positioning environment information includes the environmental component before the position related signal from the position information satellite reaches the positioning terminal. It includes position-related signal reflection information indicating the possibility of reflection by.

  According to the configuration of the fourth invention, the environment information generation device can generate the positioning environment information including the position-related signal reflection information. The position related signal reflection information is, for example, information related to the multipath described above.

  In a fifth aspect based on any one of the first to fourth aspects, the positioning environment information indicates fault type information indicating a fault type of the positioning and / or a degree of the fault of the positioning. It includes failure degree information.

There are various types of positioning obstacles, such as non-reach of radio waves that cannot receive the position-related signal and multipath described above.
Further, for example, even in the case of multipath, the degree of obstacles in positioning of the positioning terminal varies.
In this regard, according to the configuration of the fifth aspect of the invention, since the fault type information indicating the type of fault of positioning and / or fault level information indicating the degree of fault of positioning is included, The positioning terminal can be provided with information for the positioning terminal to control positioning start / stop, multipath removal, etc. in accordance with the type and / or degree of the positioning failure.

  A sixth aspect of the invention is the positioning performance information storage means for storing the positioning performance information indicating the positioning performance of the plurality of positioning terminals having different positioning performances in any one of the first to fifth aspects of the invention, and And positioning environment deterioration influence information generation means for generating positioning environment deterioration influence information indicating the influence on the positioning of each positioning terminal based on the positioning performance information and the positioning environment information.

The influence of the positioning obstacle on the positioning of the positioning terminal varies depending on the positioning performance of the positioning terminal. For example, when the position related signal from the position related satellite is weak, if the positioning terminal has a positioning performance capable of receiving the weak position related signal, the weak position related signal is received. It is possible to measure the current position. On the other hand, if the positioning terminal has positioning performance capable of receiving only a position-related signal having a high intensity, it is impossible to measure the current position by receiving the weak position-related signal. is there.
In this regard, according to the configuration of the sixth invention, since the positioning environment deterioration influence information indicating the influence on the positioning of each positioning terminal is generated based on the positioning performance information and the positioning environment information, the positioning terminal The positioning environment deterioration effect information can be provided according to the performance of the.
Thereby, the positioning terminal that has acquired the positioning environment deterioration influence information can perform control such as starting, stopping, and removing multipaths based on the positioning environment and the positioning performance.

  According to the seventh aspect of the present invention, there is provided a positioning environment information generating device that generates positioning environment information for providing to a positioning terminal that measures a current position based on a position-related signal from a position information satellite. A positioning environment information generation range information generation step for generating positioning environment information generation range information indicating a positioning environment information generation range that is a target for generating the positioning environment information, and the positioning environment information generation device includes the map Target range route information generation step for generating target range route information indicating the target range route that is the route in the positioning environment information generation range based on the route information indicating the route included in the information and the positioning environment information generation range information And the positioning environment information generation device, based on the environmental component information indicating the environmental components included in the map information and the target route information, the target range route A positioning obstacle information generation step for generating positioning obstacle information by extracting a positioning obstacle that is an environmental component that becomes an obstacle to positioning in the positioning, and the positioning environment information generation device based on the positioning obstacle information A positioning environment information generating step for generating positioning environment information indicating the type and degree of positioning fault of the positioning terminal in the target range path caused by the positioning obstacle, Achieved by the method.

  According to the configuration of the seventh invention, similar to the configuration of the first invention, there is provided the positioning environment information generation method that does not require an aerial photograph and can deal with information about obstacles other than non-arrival of satellite radio waves. be able to.

  According to an eighth aspect of the present invention, in the configuration of the seventh aspect, the positioning environment information generation device acquires positioning performance information indicating positioning performance of a plurality of the positioning terminals having different positioning performances, and The positioning environment information generation device includes a positioning environment deterioration influence information generation step for generating positioning environment deterioration influence information indicating an influence on positioning of each positioning terminal based on the positioning performance information and the positioning environment information. It is characterized by that.

  According to the configuration of the eighth invention, similarly to the configuration of the sixth invention, it is possible to provide positioning environment deterioration effect information according to the performance of the positioning terminal.

  According to the ninth aspect of the present invention, there is provided a positioning environment information generating device that generates positioning environment information for providing to a positioning terminal that measures a current position based on a position-related signal from a position information satellite. A positioning environment information generation range information generation step for generating positioning environment information generation range information indicating a positioning environment information generation range for which the positioning environment information is generated based on map information; and the positioning environment information generation device The target range route that generates the target range route information indicating the target range route that is the route within the positioning environment information generation range based on the route information indicating the route included in the map information and the positioning environment information generation range information An information generation step, and the positioning environment information generation device, based on the environmental component information indicating the environmental component included in the map information and the target route information, A positioning obstacle information generating step for generating positioning obstacle information by extracting a positioning obstacle that is an environmental component that becomes an obstacle to positioning in the target range path, and the positioning environment information generating device includes the positioning obstacle A positioning environment information generating step for generating positioning environment information indicating a type and degree of positioning failure of the positioning terminal in the target range path caused by the positioning obstacle based on information, This is achieved by the control program of the positioning environment information generating apparatus.

  According to the tenth aspect of the present invention, there is provided a positioning environment information generating device that generates positioning environment information for providing to a positioning terminal that measures a current position based on a position-related signal from a position information satellite. A positioning environment information generation range information generation step for generating positioning environment information generation range information indicating a positioning environment information generation range for which the positioning environment information is generated based on map information; and the positioning environment information generation device The target range route that generates the target range route information indicating the target range route that is the route within the positioning environment information generation range based on the route information indicating the route included in the map information and the positioning environment information generation range information An information generation step, and the positioning environment information generation device, based on the environment component information indicating the environment component included in the map information and the target route information A positioning obstacle information generation step of generating positioning obstacle information by extracting a positioning obstacle that is an environmental component that becomes an obstacle to positioning in the target range route, and the positioning environment information generation device includes the positioning obstacle A positioning environment information generating step for generating positioning environment information indicating a type and degree of positioning failure of the positioning terminal in the target range path caused by the positioning obstacle based on information, This is achieved by a computer-readable recording medium that records a control program for the positioning environment information generating apparatus.

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
The embodiments described below are preferred specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these embodiments.

(First embodiment)
FIG. 1 is a schematic diagram showing, for example, a server 20 that is a positioning environment information generation device according to the first embodiment of the present invention. The server 20 is a positioning terminal that measures the current position based on signals S1, S2, S3, and S4, for example, position-related signals from GPS satellites 12a, 12b, 12c, and 12d that are position information satellites. This is a device for generating positioning environment information 160 (see FIG. 3) to be provided to the terminal 16. The terminal 16 has a GPS device 17 for performing the above positioning. As will be described later, the positioning environment information 160 (see FIG. 3) is, for example, information indicating the type and / or degree of positioning failure described below.

  As shown in FIG. 1, there are buildings 13 and 14 around the in-passage route X holding the terminal 16, and the signal S <b> 1 from the GPS satellite 12 a etc. is reflected on the building 13 etc. and reaches the GPS device 17. A positioning failure called multipath may occur. In addition, there is a tunnel 15 on the traffic route X, and the positioning failure that the signal S1 from the GPS satellite 12a etc. does not reach the tunnel 15 and the GPS device 17 cannot receive the signal S1 etc. May occur. The above-described multipath and radio wave non-arrival are examples of positioning obstacles. A building 13 or the like that generates a multipath or the like is an example of a positioning obstacle.

If the terminal 16 has acquired the positioning environment information 160 (see FIG. 3) in advance, for example, the GPS device 17 is stopped before entering the tunnel 15 to perform control such as avoiding unnecessary power consumption. be able to.
The server 20 can communicate with the terminal 16 via, for example, the base station 18 that is a communication intermediary base and the Internet network 19 that is a communication network, and the above-described positioning environment information 160 (see FIG. 3). The terminal 16 can be provided.
The number of GPS satellites 12a and the like is not limited to four, but may be three or five or more.

(About the hardware configuration of the server 20)
FIG. 2 is a schematic diagram showing the main hardware configuration of the server 20.
As shown in FIG. 2, the server 20 has a computer, and the computer has a bus 22.
A CPU (Central Processing Unit) 24, a storage device 26, and the like are connected to the bus 22. The storage device 26 is, for example, a RAM (Random Access Memory) or a ROM (Read Only Memory).

An external storage device 28 is connected to the bus 22. The external storage device 28 is, for example, an HD (Hard Disk).
Further, the bus 22 communicates with the terminal 16 via the input device 30 for inputting various information and the like, the display device 32 for displaying various information, the base station 18 and the Internet network 19 of FIG. The communication device 34 is connected.

(About the software configuration of the server 20)
FIG. 3 is a schematic diagram showing a main software configuration and the like of the server 20.
As illustrated in FIG. 3, the server 20 includes a server control unit 100 that controls each unit.
Further, the server 20 includes an input unit 102 corresponding to the input device 30 in FIG. 2, a display unit 104 corresponding to the display device 32 in FIG. 2, and a communication unit 106 corresponding to the communication device 34 in FIG.

  Further, as shown in FIG. 3, the server 20 includes a first storage unit 110 that stores various programs, a second storage unit 130 that stores various information in advance, and a second storage unit that stores information acquired or generated by the server 20. 3 storage unit 150 is provided.

  As shown in FIG. 3, the server 20 stores map information 132 in the second storage unit 130. The map information 132 includes route information 132a indicating a route such as the traffic route X in FIG. 1 and structure information 132b indicating a structure such as the building 13 in FIG. Here, the structure such as the building 13 is an example of an environmental component. The structure information 132b is an example of environmental structure information. The map information 132 is an example of map information, and the second storage unit 130 is an example of map information storage means.

The above-described route information 132a is information indicating routes such as national roads, prefectural roads, city roads, and private roads.
The structure information 132b is information indicating structures such as a high-voltage line and a shopping street in addition to the tunnel 15 such as the building 13 in FIG.
The structure information 132b includes not only information that can be an obstacle to positioning of the terminal 16 in FIG. 1 such as the tunnel 15, but also a terminal such as a house within a height of 10 meters (m). Also included are those that do not obstruct 16 positioning.

FIG. 4 is a diagram illustrating an example of the positioning obstacle category information 134.
The above-described obstacles that can cause positioning of the terminal 16 are classified into the positioning obstacle category (see FIG. 4A). Details of the positioning obstacle category information 134 will be described later.

  As illustrated in FIG. 3, the generation target range information 152 is stored in the third storage unit 150. The generation target range information 152 is information indicating a range in which the positioning environment information 160 is generated, and is information acquired from a user (not shown) of the server 20 via the input unit 102. That is, the generation target range information 152 is an example of positioning environment information generation range information, and the third storage unit 150 is an example of positioning environment information generation range information storage means.

The generation target range information 152 described above is information indicating a region selected from the regions indicated in the map information 132. For example, the geographical range such as Chuo-ku, Tokyo, Tokyo, Kyushu, Japan, California, USA It is information to show.
Unlike the present embodiment, the generation target range information 152 may be information indicating a range within, for example, 30 kilometers (km), which is a constant radius centered on a specific point.

As illustrated in FIG. 3, the server 20 stores a passable path information generation program 112 in the first storage unit 110. Based on the route information 132a and the generation target range information 152, the server control unit 100 determines a route such as a road in the range of Chuo-ku, Tokyo shown in the generation target range information 152 based on the route information 132a and the generation target range information 152. This is information for generating the accessible route information 154 shown. The route such as a road is a route (target route) for which the positioning environment information 160 is generated. The accessible route information 154 is information indicating a map vector layer 200 (see FIG. 5) described later.
The above-described accessible route information generation program 112 and the server control unit 100 are an example of target route information generation means.

FIG. 5 is a schematic diagram showing the map vector layer 200 and the like.
The accessible route information 154 is, for example, information indicating the map vector layer 200 of FIG.
In the map vector layer 200, a passable path 202 is shown. The passable path 202 is divided into units of links 202a, 202b, 202c, 202d, and 202e, for example. The map vector layer 200 is generated based on coordinates (hereinafter referred to as reference coordinates) composed of latitude, longitude, and altitude, for example.
The server control unit 100 stores the generated accessible route information 154 (map vector layer 200) in the third storage unit 150.

The server 20 has a structure information generation program 114 as shown in FIG. The structure information generation program 114 is a range in which the server control unit 100 can affect the positioning of the terminal 16 of FIG. 1 on the accessible path 202 of FIG. 5 based on the structure information 132b and the accessible path information 154 ( For example, this is information for generating target range structure information 156 indicating a structure such as a building 13 that is within a distance of 200 meters (m) from the accessible path 202. is there.
The target range structure information 156 is not limited to the obstacle of the positioning of the terminal 16 of FIG. 1 such as the tunnel 15 or the like, but is also the obstacle of the positioning of the terminal 16 such as a one-story house. Something that does not become.
The server control unit 100 stores the generated target range structure information 156 in the third storage unit 150.

  As illustrated in FIG. 3, the server 20 stores a positioning obstacle information generation program 116 in the first storage unit 110. The positioning obstacle information generation program 116 is a positioning that the server control unit 100 is a structure that becomes an obstacle to positioning of the terminal 16 of FIG. 1 on the accessible path 202 of FIG. 5 based on the target range structure information 156, for example. This is information for extracting obstacles and generating positioning obstacle information 158. That is, the obstacle information generation program 114 and the server control unit 100 are an example of positioning obstacle information generation means.

  Based on the positioning obstacle information generation program 116, the server control unit 100 determines whether, for example, the building 13 shown in FIG. 1, which is the structure indicated by the target range structure information 156, is the above-described positioning obstacle. Judging. Specifically, the server control unit 100 determines whether the building 13 or the like belongs to the positioning obstacle category indicated by the positioning obstacle category information 134 stored in the second storage unit 130 of FIG. Then, when the building 13 or the like belongs to any of the positioning obstacle categories, the server control unit 100 generates the positioning obstacle information 158 with reference to the positioning obstacle detailed information 136 in FIG.

As described above, FIG. 4 is a schematic diagram illustrating an example of the positioning obstacle category information 134.
As shown in FIG. 4A, the positioning obstacle category includes, for example, a radio wave intensity reduction category 134a and a multipath generation category 134b.
The radio wave strength lowering category 134a is a category to which a positioning obstacle that may reduce the signal strength such as the signal S1 from the GPS satellite 12a or the like belongs.
The multipath generation category 134b is a category to which a positioning obstacle that may reflect the signal S1 or the like from the GPS satellite 12a or the like of FIG. 1 before reaching the positioning terminal 16 belongs.
As shown in FIG. 4A, the building 13 belongs to the multipath generation category 134b, and the tunnel 15 belongs to the radio wave intensity reduction category 134a.

As illustrated in FIG. 3, the server 20 stores positioning obstacle detailed information 136 indicating detailed information of the positioning obstacle in the second storage unit 130. That is, the second storage unit is an example of a positioning obstacle detailed information storage unit. The positioning obstacle detailed information 136 is information indicating details of individual positioning obstacles such as the height of the building 13 and the like, the opening area and the length of the tunnel 15, and the like.
For example, the tunnel 15 which is a positioning obstacle is different in the degree to which the signal S1 and the like can be received in the tunnel depending on the length and the like. Therefore, in order to reliably determine whether or not the positioning of the terminal 16 in FIG. 1 is an obstacle, detailed information such as the length of the tunnel is required in addition to the information that the tunnel is merely used.
In this regard, since the server 20 has the positioning obstacle detailed information 136, for example, it can be reliably determined whether or not the tunnel 15 in FIG.

The server control unit 100 generates positioning obstacle information 158 based on the positioning obstacle detailed information 136 corresponding to each positioning obstacle such as the building 13. Specifically, the positioning obstacle information 158 corresponds to coordinates defined by latitude, longitude, and altitude, and is information indicating the map object layer 220 of FIG. The map object layer 220 is generated based on the reference coordinates common to the map vector layer 200 described above.
The server control unit 100 stores the generated positioning obstacle information 158 (map object layer 220) in the third storage unit 150.

As shown in FIG. 3, the server 20 stores a positioning environment information generation program 118 in the first storage unit 110. In the positioning environment information generation program 118, the server control unit 100 determines that the positioning obstacle is, for example, the building 13 in FIG. 1 of the terminal 16 in FIG. 1 in the path 202 in FIG. 5 based on the positioning obstacle information 158. This is information for generating positioning environment information 160 indicating the type and / or degree of positioning failure. That is, the positioning environment information generation program 118 and the server control unit 100 are an example of positioning environment information generation means. The positioning environment information 160 is information indicating the positioning environment layer 240 of FIG. The positioning environment layer 240 is generated based on the reference coordinates common to the map vector layer 200 and the map object layer 220 described above.
Specifically, the server control unit 100 generates positioning environment information 160 for each link 202a of the map vector layer 200 indicated by the positioning possible route information 154 in FIG. 3 based on the positioning environment information generation program 118.

FIG. 4B is a diagram illustrating an example of the positioning environment information generation program 118.
As shown in FIG. 4 (b), the positioning environment information generation program 118, for example, for a tunnel that is a positioning obstacle in the radio field strength reduction category 134a, the server control unit 100 considers the opening area S and the tunnel length L. The item is information for generating positioning environment information 160 according to a determination method in which it is determined that positioning is impossible if S / (2 × L) ≦ 1.0 is satisfied.
For example, based on the positioning environment information generation program 118, the server control unit 100 determines that the tunnel 15 of FIG. 1 shown in the positioning obstacle information 158 belongs to a tunnel that is a positioning obstacle, for example, and positioning obstacle information Whether or not S / (2 × L) ≦ 1.0 is satisfied is determined based on the opening area S and the tunnel length L, which are detailed information of the tunnel 15 included in 158 (see FIG. 3).

That is, the tunnel 15 located within the positioning influence range of the link 202a of the map vector layer 200 of FIG. 5 has an opening area S of 50 square meters (m ² ) and a length of 50 meters (m). The server control unit 100 confirms that S / (2 × L) ≦ 1.0 is satisfied for the tunnel 15 based on the positioning environment information generation program 118 of FIG. 6. And the server control part 100 produces | generates the positioning environment information 160 containing the positioning impossible information which shows that positioning is impossible. Here, when S / (2 × L) ≦ 1.0 is satisfied, the radio wave intensity of the signal S1 or the like from the GPS satellite 12a or the like in FIG. 1 is, for example, 160 decibel meters (dBm) or less, and positioning is performed. It is assumed that the signal S1 or the like cannot be received with possible signal strength.
That is, the positioning impossible information is information indicating that the terminal 16 cannot receive the signal S1 or the like from the GPS satellite 12a or the like with a signal strength capable of positioning. This positioning impossible information is an example of receivability information.
The positioning environment information 160 not only indicates whether or not positioning is possible, but also calculates, for example, the receivable radio wave intensity from the value of S / (2 × L), and the radio wave intensity is also calculated. Also includes information to indicate. That is, the positioning environment information 160 includes information indicating the degree of positioning failure.

Further, for example, the building 13 located within the positioning influence range of the link 202c of the map vector layer 200 in FIG. 5 is 10 meters (m) high, the building 131 is 30 meters (m) high, and the building 132 is 8 high. Meter (m). These buildings 13 and the like belong to the multipath generation category 134b as shown in FIG. Based on the positioning environment information generation program 118 in FIG. 4, the server control unit 100 determines that the multipath strength is high if the building 13, the building 131, and the building 132 are densely located within a radius of 30 meters (m) from the link 202c. Judged to be the maximum level 3.
Even if the buildings 13 or the like are not dense within a radius of 30 meters (m), for example, if the building 131 is 6 stories or more, it is determined that the level is level 3.
Furthermore, even if the density of the building 13 or the like is low and the height is low, for example, if the material of the surface of the building 13 is a mirror-like mirror glass, it is determined to be level 3, and the multipath level is level. 3, the positioning environment information 160 containing the multipath generation information indicating 3 is generated.
The multipath generation information includes multipath level information indicating the multipath level as described above. That is, the multipath occurrence information includes information indicating the degree of positioning failure.
Here, the multipath generation information is information indicating that the signal S1 or the like from the GPS satellite 12a or the like in FIG. 1 is reflected by the building 13 or the like before reaching the terminal 16. That is, the multipath generation information is an example of position-related signal reflection information.

  Further, for example, in the store 228 located within the positioning influence range of the link 202d of the map vector layer 200 in FIG. 5, the occupation ratio of the glass window to the wall surface is 60% (%). Based on the positioning environment information generation program 118 in FIG. 4, the server control unit 100 determines that the glass window occupation ratio α (%) with respect to the wall surface of the store 228 is 70% (%) or less, and positioning is impossible. The positioning environment information 160 that there is is generated.

As described above, the positioning environment information 160 includes, for example, positioning impossible information and multipath generation information indicating types of positioning obstacles.
The positioning environment information 160 includes, for example, multipath level information indicating the degree of positioning failure.

FIG. 6 is a diagram illustrating an example of positioning environment information.
As shown in FIG. 6, the positioning environment information 160 is generated, for example, for each passable road link 202a, and indicates whether or not positioning is possible, radio wave intensity, and multipath level. Further, as described above, the positioning environment information 160 is information indicating the positioning environment layer 240 of FIG.
The server control unit 100 stores the positioning environment information 160 (positioning environment layer 240) generated as described above in the third storage unit 150.

As described above, the server 20 can generate the positioning environment information 160 without using an aerial photograph.
That is, the server 20 does not require an aerial photograph and can also provide information about failures other than the non-arrival of satellite radio waves.

(Regarding the operation example of the server 20 of the present embodiment)
Although the server 20 is configured as described above, an example of its operation will be described below.
FIG. 7 is a schematic flowchart showing an operation example of the server 20.

  First, the server 20 generates the generation target range information 152 (see FIG. 3) indicating the geographical range that is the target for generating the positioning environment information 162 of FIG. 3 (the positioning environment layer 240 of FIG. 5) (see FIG. 7). Step ST1). That is, step ST1 is an example of a positioning environment information generation range information generation step. The geographical range shown in the generation target range information 152 is, for example, an area within a circle whose radius centered at a specific point is, for example, 30 kilometers (km).

  Subsequently, based on the route information 132a (see FIG. 3) and the generation target range information 152, the server 20 can pass through the route information 154 (in FIG. 5) indicating the route within the geographical range indicated by the generation target range information 152. A map vector layer 200) is generated (step ST2). That is, step ST2 is an example of the target route information generation step.

Subsequently, based on the structure information 132b (see FIG. 3) and the accessible road information 154, the server 20 has a structure within the positioning influence range in the accessible road 202, for example, within 200 meters (m). It is determined whether or not (step ST3).
If there is a corresponding structure, the server 20 determines whether or not the structure is a positioning obstacle (step ST4). If it is determined that the structure is a positioning obstacle, the server 20 determines the positioning. Positioning obstacle information 158 including the positioning obstacle detailed information of FIG. 3 corresponding to the obstacle is generated (step ST5).
Steps ST4 to ST5 described above are an example of a positioning obstacle information generation step.
The positioning obstacle information 158 is specifically information indicating the map object layer 220 in FIG.

Subsequently, the server 20 determines, based on the positioning obstacle information 158 (map object layer 220), the types of positioning obstacles of the terminal 16 of FIG. 1 in the accessible path 202 (see FIG. 5) generated by the positioning obstacles and Positioning environment information 160 (see FIGS. 3 and 6) indicating the degree is generated (step ST6). That is, step ST6 is an example of a positioning environment information generation step.
In step ST6, specifically, the server 20 processes the positioning obstacle, for example, the building 13 or the like for each multipath occurrence category 134b which is the positioning environment obstacle category (see FIG. 4), and performs positioning. The environment information 160 is generated.
As described above, the server 20 does not require an aerial photograph and can generate the positioning environment information 160 including information about a failure other than the non-arrival of satellite radio waves.

(Second Embodiment)
Next, a second embodiment will be described. The configuration of the server 21 (see FIG. 1) in the second embodiment is similar to that of the server 20 in the first embodiment, so that common parts are the same as those in the first embodiment, and the description thereof is omitted. The difference will be mainly described.

FIG. 8 is a schematic diagram showing the main software configuration of the server 21.
FIG. 9 is a diagram showing an example of positioning terminal performance information 136 (see FIG. 8).
As illustrated in FIG. 8, the server 21 stores positioning terminal performance information 138 in the second storage unit 130. As shown in FIG. 9A, the positioning terminal performance information 138 is information indicating the positioning performance of, for example, model A and model B, which are models of a plurality of positioning terminals having different positioning performance. That is, the positioning terminal performance information 138 is an example of positioning performance information. The second storage unit 130 is an example of positioning performance information storage means.
As shown in FIG. 9A, the positioning terminal performance information 138 receives, for example, a signal S1 or the like (see FIG. 1) having a radio wave intensity of minus 150 decibel meters (−150 dBm) or more as the maximum sensitivity of model A. It shows that positioning is possible. Further, as the multipath tolerance of the model A, the multipath level indicates that positioning is possible even at level 3.
As shown in FIG. 9A, the positioning performance differs between the model A and the model B for both the maximum sensitivity and the multipath resistance.

As illustrated in FIG. 8, the server 21 stores a positioning terminal performance information acquisition program 122 in the first storage unit 110. The positioning terminal performance information acquisition program 122 is a positioning in which the server control unit 100 acquires information on the model corresponding to the terminal 16 that provides the positioning environment information 160 from the positioning terminal performance information 138 stored in the second storage unit 130. This is information for executing the terminal performance information acquisition step.
The server 21 acquires information on the model from the terminal 16 through the base station 18 and the Internet network 19 in FIG. 1 by the communication unit 106 in FIG.

As illustrated in FIG. 8, the server 21 includes an environment deterioration influence degree information generation program 124. The environment deterioration influence degree information generation program 124 allows the server control unit 100 to determine the positioning of the terminal 16 based on the positioning terminal performance information 138 (see FIGS. 8 and 9A) and the positioning environment information 160 (see FIG. 8). This is information for carrying out a positioning environment deterioration influence information generation step for generating positioning environment deterioration influence information 164 (see FIG. 8) indicating the influence on the environment.
That is, the environment deterioration influence information generation program 124 and the server control unit 100 are an example of a positioning environment deterioration influence information generation unit.

FIGS. 9B and 9C are diagrams illustrating an example of the individual environment information 160a and the like.
As shown in FIG. 9B, the positioning environment deterioration influence degree information 164a indicates the influence of the positioning environment for each link 202a of the accessible path 202 in FIG. 5 on the positioning when the terminal 16 is the model A. It is information to show.
For example, in the passable link 202d, since the radio wave intensity is minus 150 decibel meters (−150 dBm), the model A having the maximum sensitivity of minus 150 decibel meters (−150 dBm) as shown in FIG. 1 is the model A, the server 21 provides the terminal 16 with the individual environment information 160a including the positioning environment deterioration influence information 164a corresponding to the model A type.
On the other hand, since the radio wave intensity is −150 decibel meters (−150 dBm) in the passable link 202d, the model B having the maximum sensitivity of −145 decibel meters (−145 dBm) cannot be positioned. If the terminal 16 is model B, the server 21 provides the terminal 16 with individual environment information 160b including positioning environment deterioration influence information 164b corresponding to the type of model B shown in FIG.
Therefore, the server 21 can provide the individual environment information 160a including the appropriate positioning environment deterioration influence information 164a according to the positioning performance of the terminal 16. That is, the server 21 can provide the individual environment information 160a and the like for the terminal 16 to appropriately perform control such as start, stop, and multipath removal based on the positioning environment and its positioning performance. .

(About programs and computer-readable recording media)
Positioning environment information generation apparatus for causing a computer to execute the positioning environment information generation range information generation step, the target range route information generation step, the positioning obstacle information generation step, the positioning environment information generation step, etc. Control program.
Moreover, it can also be set as the computer-readable recording medium etc. which recorded the control program etc. of such a positioning environment information generation apparatus.

  A program storage medium used for installing the control program of the positioning environment information generating apparatus in a computer and making it executable by the computer is, for example, a flexible disk such as a floppy (registered trademark), a CD-ROM (Compact). Not only package media such as Disc Read Only Memory (CD-R), Compact Disc-Recordable (CD-R), Compact Disc-Rewriteable (CD-RW) and DVD (Digital Versatile Disc), but also programs are stored temporarily or permanently. It can be realized by a semiconductor memory, a magnetic disk or a magneto-optical disk.

  The present invention is not limited to the embodiments described above. Furthermore, the above-described embodiments may be combined with each other.

It is the schematic which shows the positioning environment information generation apparatus etc. which concern on embodiment of this invention. It is the schematic which shows the main hardware constitutions of a server. It is the schematic which shows the main software structures etc. of a server. It is the schematic which shows one example of positioning obstacle category information. It is the schematic which shows a map vector layer etc. It is a figure which shows one example of a positioning environment information generation program. It is a schematic flowchart which shows the operation example of a server. It is the schematic which shows the main software structures etc. of a server. It is a figure which shows one example of positioning terminal performance information.

Explanation of symbols

  12a, 12b, 12c, 12d ... GPS satellites, 13, 14 ... building, 15 ... tunnel, 16 ... terminal, 17 ... GPS device, 20, 21 ... server, 112 ..Passable route information generation program, 114 ... structure information generation program, 116 ... positioning obstacle information generation program, 118 ... positioning environment information generation program, 122 ... positioning terminal performance information acquisition program 124 ... Environmental degradation impact information generation program

Claims (10)

A positioning environment information generating device that generates positioning environment information for providing to a positioning terminal that measures a current position based on a position-related signal from a position information satellite,
The positioning environment information generating device
Map information storage means for storing route information indicating a route and map information including environmental component information indicating an environmental component;
Positioning environment information generation range information generating means for generating positioning environment information generation range information indicating a range in which the positioning environment information is to be generated in the area indicated by the map information;
Based on the route information and the positioning environment information generation range information, target range route information generation means for generating target range route information indicating the target range route that is the route in the positioning environment information generation range;
Positioning obstacle information that generates positioning obstacle information by extracting a positioning obstacle that is the environmental constituent that is an obstacle to the positioning in the target range path based on the environmental constituent information and the target range path information Generating means;
Positioning environment information generating means for generating positioning environment information indicating the positioning environment of the positioning terminal in the target range route based on the positioning obstacle information;
A positioning environment information generating device characterized by comprising: Positioning obstacle detailed information storage means for storing detailed information of the positioning obstacle,
2. The positioning environment information according to claim 1, wherein the positioning obstacle information generation unit generates the positioning obstacle information including the positioning obstacle detailed information corresponding to each of the positioning obstacles. Generator.   The positioning environment information includes receivability information indicating that the positioning terminal can receive a position-related signal from the position information satellite with a signal strength capable of positioning. The positioning environment information generation device according to claim 2.   2. The positioning environment information includes position related signal reflection information indicating that a position related signal from the position information satellite may be reflected by the environmental component before reaching the positioning terminal. The positioning environment information generation device according to any one of claims 3 to 4.   5. The positioning environment information includes fault type information indicating a fault type of the positioning and / or fault degree information indicating a fault level of the positioning. Positioning environment information generator. Positioning performance information storage means for storing positioning performance information indicating the positioning performance of the plurality of positioning terminals having different positioning performance;
Based on the positioning performance information and the positioning environment information, positioning environment deterioration influence information generating means for generating positioning environment deterioration influence information indicating the influence on the positioning of each positioning terminal;
The positioning environment information generating device according to claim 1, comprising: A positioning environment information generating device that generates positioning environment information for providing to a positioning terminal that measures a current position based on a position-related signal from a position information satellite is an object for generating the positioning environment information based on map information A positioning environment information generation range information generation step for generating positioning environment information generation range information indicating a positioning environment information generation range to be;
The positioning environment information generating device is a target range route that indicates a target range route that is the route in the positioning environment information generation range based on the route information indicating the route included in the map information and the positioning environment information generation range information. A target range route information generation step for generating information;
The positioning environment information generating device is a positioning fault that is an environmental constituent that becomes an obstacle to the positioning in the target range route based on the environmental constituent information indicating the environmental constituent included in the map information and the target route information. A positioning obstacle information generation step for extracting positioning objects and generating positioning obstacle information;
The positioning environment information generating device generates positioning environment information indicating the type and degree of positioning failure of the positioning terminal in the target range route generated by the positioning obstacle based on the positioning obstacle information. An information generation step;
A positioning environment information generation method characterized by comprising: The positioning environment information generating device acquires positioning performance information indicating positioning performance of a plurality of the positioning terminals having different positioning performances, and a positioning performance information acquisition step;
The positioning environment information generation device generates positioning environment deterioration influence information generation step for generating positioning environment deterioration influence information indicating an influence on positioning of each positioning terminal based on the positioning performance information and the positioning environment information, and
The positioning environment information generation method according to claim 7, further comprising: On the computer,
A positioning environment information generating device that generates positioning environment information for providing to a positioning terminal that measures a current position based on a position-related signal from a position information satellite is an object for generating the positioning environment information based on map information A positioning environment information generation range information generation step for generating positioning environment information generation range information indicating a positioning environment information generation range to be;
The positioning environment information generating device is a target range route that indicates a target range route that is the route in the positioning environment information generation range based on the route information indicating the route included in the map information and the positioning environment information generation range information. A target range route information generation step for generating information;
The positioning environment information generating device is a positioning fault that is an environmental constituent that becomes an obstacle to the positioning in the target range route based on the environmental constituent information indicating the environmental constituent included in the map information and the target route information. A positioning obstacle information generation step for extracting positioning objects and generating positioning obstacle information;
The positioning environment information generating device generates positioning environment information indicating the type and degree of positioning failure of the positioning terminal in the target range route generated by the positioning obstacle based on the positioning obstacle information. An information generation step;
A control program for a positioning environment information generation device characterized in that On the computer,
A positioning environment information generating device that generates positioning environment information for providing to a positioning terminal that measures a current position based on a position-related signal from a position information satellite is an object for generating the positioning environment information based on map information A positioning environment information generation range information generation step for generating positioning environment information generation range information indicating a positioning environment information generation range to be;
The positioning environment information generating device is a target range route that indicates a target range route that is the route in the positioning environment information generation range based on the route information indicating the route included in the map information and the positioning environment information generation range information. A target range route information generation step for generating information;
The positioning environment information generating device is a positioning fault that is an environmental constituent that becomes an obstacle to the positioning in the target range route based on the environmental constituent information indicating the environmental constituent included in the map information and the target route information. A positioning obstacle information generation step for extracting positioning objects and generating positioning obstacle information;
The positioning environment information generating device generates positioning environment information indicating the type and degree of positioning failure of the positioning terminal in the target range route generated by the positioning obstacle based on the positioning obstacle information. An information generation step;
The computer-readable recording medium which recorded the control program of the positioning environment information generation apparatus characterized by performing this.

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