JP2001318134A - Positional information transmitter and traffic information system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the communication cost of positional information while lessening the system load. SOLUTION: A control section 11 calculates the reliability Pnew of measurement results Gnew from a position detecting section 12 with reference to a reliability table T stored at a storing section 17 (S16b). The reliability table T determines the reliability depending on reception of a radio wave by a D-GPS receiver 12d, and the number of satellites captured by the D-GPS receiver 12d. If a calculated reliability Pnew is higher than a reliability Pkeep stored at the storing section 17, the control section 11 updates positional information Gpos to the detected measurement results Gnew and delivers the updated positional information Gpos (=Gnew) to an information processing center 20. Since the positional information is generated for specific measurement results selected depending on the reliability before being transmitted, communication and information processing cost can be reduced while lessening the operating load.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a position information transmitting device for transmitting position information generated based on positioning, and a traffic information system for generating traffic information based on the position information.

[0002]

2. Description of the Related Art It is desirable that traffic information be generated based on real-time information in order to enhance its utility value. For this reason, for example, as disclosed in Japanese Patent Application Laid-Open No. 8-212490, a management center transmits position information and the contents of traffic regulation actually implemented at a site from a transmitter installed at the site where a traffic obstacle has occurred. Techniques for receiving and generating and providing traffic information based on these are known. In this technology, position information is generated for each positioning using GPS,
Sent to the management center.

[0003]

SUMMARY OF THE INVENTION However, GPS
In the positioning, the reception status of the radio wave from the GPS satellite may not be good depending on the positioning timing, and the position information generated based on the positioning result in such a situation has a large error. For this reason, in the above-described conventional technology using GPS positioning, position information having a large error may be transmitted, which wastes communication costs and information processing costs of the management center. Further, in the above-described related art, since the position information is generated and transmitted for all the positioning results, there is a problem that a load on communication and information processing increases.

[0004] In view of the above problems, an object of the present invention is to reduce the cost and load of communication and information processing in a position information transmitting device and a traffic information system.

[0005]

According to the present invention, a position information transmitting apparatus comprises: a positioning means for obtaining a plurality of positioning results for a predetermined position; a reliability calculating means for calculating a reliability for each positioning result; A position information generating unit configured to generate a smaller number of pieces of position information than the plurality of positioning results based on the reliability and the positioning result; and a transmitting unit transmitting the position information. According to such a configuration, since position information can be generated and transmitted based on the positioning result selected and selected according to the reliability, the cost and the load on communication and information processing can be reduced. it can.

In the present invention, the reliability calculation means may include:
Preferably, the positioning means detects a position based on a received radio wave, and the reliability calculation means calculates reliability based on a reception state of the positioning means. With such a configuration, it is possible to provide the positioning result with an appropriate degree of reliability in accordance with the reception situation.

In the present invention, it is preferable that the reception status includes the number of basic data for positioning by the positioning means. With such a configuration, it is possible to give an appropriate degree of reliability to the positioning result according to the number of basic positioning data.

In the present invention, the positioning means may be a GPS.
It is preferable that a receiving means and a D-GPS receiving means are provided, and the reception status includes presence / absence of radio wave reception by the D-GPS receiving means. With such a configuration, it is possible to provide the positioning result with an appropriate degree of reliability based on whether or not the position is corrected by D-GPS.

Further, according to the present invention, the reception status is the G
It is preferable to include the number of satellites captured by the PS receiving means. With such a configuration, it is possible to provide the positioning result with an appropriate degree of reliability according to the number of captured satellites.

In the present invention, it is preferable that the reception status includes a reception level of a reception radio wave. With such a configuration, it is possible to give appropriate reliability to the positioning result according to the reception level.

According to the present invention, a traffic information system includes a site terminal and an information processing center, wherein the site terminal obtains a plurality of positioning results for a predetermined position, and a reliability for each positioning result. A reliability calculation means for calculating, the position information generation means for generating the number of position information less than the number of the plurality of positioning results based on the reliability and the positioning result, transmission means for transmitting the position information,
And the information processing center includes traffic information generating means for generating traffic information based on position information from a site terminal. With this configuration, the on-site terminal can generate and transmit the position information based on the positioning result selected and selected according to the reliability, thereby reducing costs required for communication and information processing for generating traffic information. In addition, the load can be reduced.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a block diagram of a traffic information system, FIG. 2 is a block diagram of a traffic information system site terminal, FIG. 3 is a block diagram of a traffic information system information processing center, and FIG. FIG. 5 is a schematic configuration diagram of an operation panel of an operation unit including an input unit and an output unit, FIG. 5 is a schematic configuration diagram in which a site terminal is applied to a post cone, and FIG. 6 is a history of each traffic obstacle output by a traffic information system. FIG. 7 shows a reliability table that defines the reliability according to the reception situation.

The traffic information system 1 according to the present embodiment generates a traffic obstacle information indicating a situation of a traffic obstacle site including location information and transmits the traffic obstacle information to an information processing center 20.
And an information processing center 20 that receives the traffic obstacle site information, generates traffic information based on the information, and provides the traffic information to the outside. The site terminal 10 is configured as, for example, a portable terminal, and is connected to the information processing center 20 via the mobile communication network 40 and the communication network 50. Further, information generated at the information processing center 20, for example, traffic information, is transmitted to the information user terminal 30 connected via the communication network 50,
Used by information users.

The on-site terminal 10 controls the entire on-site terminal 10 and generates information to be transmitted to the information processing center 20, for example, a CPU, a position detecting unit 12 for detecting the current position of the on-site terminal 10, a traffic obstruction. An input unit 13 for inputting various information such as site information and various instructions to the control unit 11, for example, an input switch, an output unit 14 for displaying the status of the site terminal 10, for example, an LED, and information via a mobile communication network 40. A mobile communication unit 15 and a mobile communication antenna 16 for transmitting and receiving information between the processing center 20 and the control unit 11;
The control unit 11 includes a storage unit 17 for storing parameters required for control or generation of information in the control unit 11, for example, a memory.

The control section 11 generates traffic obstacle site information based on the input from the input section 13. In the present embodiment, the traffic obstacle site information includes traffic regulation information (information indicating whether there is a sidewalk regulation, whether there is a roadside regulation, whether there is a roadway regulation, whether there is an alternating traffic regulation, and whether there is a traffic stop regulation), work / non-work. Work information (information indicating whether or not work is being performed) is included. As shown in FIG. 4, the presence / absence and distinction between work and non-work are input to these pieces of information by the changeover switches 13 a to 13 f of the input unit 13. The input unit 13 includes a transmission command switch 13h, and the setting of the traffic control information changeover switches 13a to 13e is input to the control unit 11 by operating the transmission command switch 13h and transmitted to the information processing center 20. It is configured as follows. With such a configuration, the changeover switches 13a to 13
Since the information can be transmitted after confirming the setting state of e, transmission of erroneous information on traffic regulation can be suppressed.

The traffic obstacle site information includes position information generated by the control unit 11 based on the positioning result detected by the position detection unit 12. A position detector 12 as a positioning means includes a GPS antenna 12a for receiving radio waves from GPS satellites, and a GPS receiver 12 for detecting the current position of the site terminal 10 as latitude and longitude based on the radio waves.
b, an FM antenna 12c for receiving GPS error data from a fixed station on the ground by FM radio waves, and detecting error data based on the FM radio waves to obtain a GPS receiver 12b
D that corrects the positioning result detected by the error data
-A GPS receiver 12d is provided.

The control unit 11 calculates the reliability of the positioning result by the position detection unit 12, and generates position information according to the reliability. In the present embodiment, the control unit 11 calculates the reliability based on the reliability table T stored in the storage unit 17. The reliability table T determines the reliability according to the reception status. For example, in the example shown in FIG. 7, whether or not radio waves are received by the D-GPS receiver and the number of satellites transmitting the radio waves received by the GPS receiver (ie, the number of captured satellites)
It is determined according to. In the case of this example, when there is D-GPS reception, the GPS data is corrected, and as the number of acquired satellites increases, the basic data increases, so that the reception condition becomes good. Therefore, the reliability with D-GPS reception is set higher than that without D-GPS reception, and the reliability is set higher as the number of captured satellites increases. That is, more specifically, the case in which the D-GPS receiver is not received (that is, GPS alone positioning) is further divided into a plurality according to the number of captured satellites, and the reliability is determined in ascending order of the number of captured satellites. In the example of FIG. 7, the number of captured satellites 1 to 8 is 11 to 11 respectively.
18 reliability levels are assigned. Also, in the case where the D-GPS receiver is received, the reliability is determined in ascending order of the number of acquired satellites, similarly to the case where the D-GPS receiver is not received. FIG.
In the example, the number of captured satellites 1 to 8 is 21 to 2 respectively.
8 is assigned.

The control unit 11 gives a traffic obstacle identifier (traffic obstacle ID) for identifying the traffic obstacles. In the present embodiment, the traffic obstacle identifier is the field terminal 10
Is generated based on the terminal identifier (terminal ID) for identifying the traffic and the time when the control unit 11 detects the occurrence of the traffic obstacle. More specifically, the terminal identifier is an identifier unique to the site terminal 10, and for example, an IP address or the like set for communication is used. The terminal identifier is, for example, the storage unit 1
7, the control unit 11 refers to the storage unit 17 and acquires it. The control unit 11 is, for example, the input unit 1
Based on a predetermined input (for example, turning on the power switch 13g) in 3, the occurrence of a traffic obstacle is detected, and the time information of the detection is acquired from, for example, the clock unit 11a built in the control unit 11 and generating the time information. And the control unit 11
Are the acquired terminal identifiers, for example, IP addresses (@
＠＠. ＠＠＠. ＠. ＠＠), and time information, for example, traffic trouble occurrence time (*** / ** / ** / **: **: *)
*) [= Year / month / day / hour: minute: second], for example, by arranging these in order, the traffic obstruction identifier (＠＠＠. ＠＠＠. ＠＠＠.
(***** / ** / ** / **: **: **) is generated. The generated traffic obstacle identifier is stored in the storage unit 17 while the traffic obstacle continues.

The control section 11 appropriately combines information generated or received by the control section 11 according to the situation, and generates terminal information to be transmitted to the information processing center 20. However, at this time, the control unit 11 reads the traffic obstacle identifier stored in the storage unit 17 and always includes this in the terminal information.

The storage unit 17 stores, in addition to the parameters relating to the control of each unit of the site terminal 10 and the terminal identifier described above, information generated by the site terminal 10 (that is, in this embodiment, the traffic obstacle identifier and the traffic obstacle site). Information (including position information, traffic regulation information, and work / non-work information)) is stored. Further, the storage unit 17 stores the positioning result Gkeep together with the reliability Pkeep. The positioning result stored here can be, for example, a positioning result selected from a plurality of positioning results detected by the position detection unit 12 (for example, a positioning result with the highest reliability).

In this embodiment, the on-site terminal 10 is configured as a post cone installed on the road as shown in FIG. That is, position detection inside the case 10a excluding the power supply unit 10b, the main unit 10c including the control unit 11 and the storage unit 17, the operation unit 10d including the input unit 13 and the output unit 14, and the D-GPS receiver 12d from below. The communication unit 10e including the unit 12, the mobile communication unit 15, and the mobile communication antenna 16 is superimposed, and a telescopic FM antenna 12c is provided outside the 10a.

The information processing center 20 is an information processing center 2
0 A control unit 21 for controlling each unit, for example, a CPU, a storage unit 2 for storing traffic obstacle site information received from the site terminal 10.
2 For example, a hard disk device, an input unit 24 for inputting an instruction to the control unit 21, for example, a keyboard, an output unit 25 for outputting information from the control unit 21, for example, a display, and communication with the site terminal 10 via the communication network 50 And a communication interface 23 for performing the operation.

The site terminal 10 and the information processing center 20
The communication is performed periodically at a predetermined communication interval. In the present embodiment, the control unit 21 generates communication interval information indicating the communication interval. This communication interval information is stored in the storage unit 22 and transmitted to the site terminal 10. On-site terminal 10
Obtains the communication interval information and causes the storage unit 17 to store the information. That is, the site terminal 10 and the information processing center 20 both acquire and share the communication interval information. For this reason, it is possible to recognize the timing of performing communication with each other, so that it is possible to determine the end of the traffic obstacle in the site terminal 10 based on the presence or absence of communication at the communication interval. More specifically, in the present embodiment, when communication from the site terminal 10 at the communication interval is interrupted, the control unit 21 considers that the traffic obstacle in the site terminal 10 has ended.

The traffic obstacle site information received from the site terminal 10 is stored in the storage unit 22 in association with the traffic obstacle identifier. Further, the control unit 21 stores the traffic obstacle site information in association with the time information (that is, for example, associates the traffic obstacle site information with the time information [for example, reception time] acquired from a clock unit (not shown)) and stores it in the storage unit 22. Thereby, as shown in FIG. 6, the control unit 21 can cause the output unit 25 to output this history for each traffic obstacle. In this embodiment, since the work / non-work information is included in the traffic obstacle site information, the construction manager can know the progress of the work by acquiring the work / non-work information from the information processing center 20.

The control unit 21 acquires the latest traffic obstacle site information for each traffic obstacle from the storage unit 22 based on the traffic obstacle identifier and time information, for example, the reception time, and generates traffic information based on these. This can be provided.

Next, the operation of the traffic information system of the present invention will be described. First, the operation of the site terminal 10 will be described. FIG. 8 is a flowchart showing the operation of the on-site terminal, FIG. 9 is a process for assigning a traffic obstacle identifier, and FIG.
FIG. 11 illustrates a position detecting step, FIG. 12 illustrates a step of transmitting information according to a request from a center, and FIG. 13 illustrates a step of actively transmitting information by a site terminal. FIG. 14 shows a line connection confirmation step.

When the power switch 13g is turned on, first, the control unit 11 is initialized (initializing step S of the control unit).
11). Next, in the control unit 11, a traffic obstacle identifier is assigned to the traffic obstacle (a traffic obstacle identifier assigning step S12). More specifically, in this step S12, as described above, first, time information is obtained from the clock unit 11a (time information obtaining step S12a), and then, a terminal identifier is obtained from the storage unit 17 (terminal identifier obtainment). Step S12b), a traffic obstruction identifier is generated by combining the time information and the terminal identifier, and given to the traffic obstruction (combining time information and terminal identifier)
12c).

Next, the control unit 11 reads the initial set value in the input unit 13, that is, in this embodiment, the traffic regulation information and the work / non-work information (the input unit initial set value reading step S13).

Next, the control section 11 performs an initial setting of the position detecting section 12 (step S14 for initializing the position detecting section). More specifically, in this step S14, the position detecting unit 12
, The setting for specifying the position information output from the position detection unit 12 is performed by outputting a serial command. For example, the communication format between the position detection unit 12 and the control unit 11 is set as follows: communication method: start-stop synchronization, transmission speed: 4800 bp
s, data length: 8 bits, stop bit: 1 bit,
Signal level: set to RS232C (negative logic).

Next, the control section 11 makes a line connection from the mobile communication section 15 to the information processing center 20 (line connection step S15 by the mobile communication section). More specifically, in this step S15, a line connection operation is first performed (line connection operation execution step S15a), and then a line connection state is detected and determined (line connection state determination step S15b).
If the line connection does not hinder the transmission of information, the work / non-work information of the traffic obstacle information is transmitted to the information processing center 20 (work / non-work information transmission step S1).
5c). That is, in this step S15c, information set to be automatically transmitted according to a change in the situation is transmitted to the information processing center 20. Next, communication interval information indicating a regular communication interval between the site terminal 10 and the information processing center 20 for each traffic obstacle is received from the information processing center 20 (communication interval information receiving step S15d). The communication interval information is stored in the storage unit 17, and thereafter, the site terminal 10 transmits the terminal information to the information processing center 20 at intervals of the time indicated by the communication interval information. Information processing center 20
Means that if there is no communication from the site terminal 10 within the period specified in the communication interval information after the last communication with the site terminal 10, it is determined that the traffic obstacle in the site terminal 10 has been resolved. can do. If the line connection state is a state that hinders the information transmission in step S15b, the process returns to step S15a again and attempts to connect again.

Thereafter, position detection is performed by the position detection section 12 (position detection step S16). More specifically, in step S16, first, the control unit 11 acquires a positioning result, for example, GPS data Gnew from the position detection unit 12 (positioning result acquiring step S16a). Next, the control unit 1
1 calculates the reliability Pnew for the positioning result Gnew (reliability calculating step S16b). GPS detected
The presence or absence of D-GPS reception and the number of captured satellites can be detected from the data and the D-GPS data. In this step S16b, the control unit 11 sets the reliability table T
, The reliability Pnew according to the reception status (that is, the presence or absence of D-GPS reception and the number of captured satellites in the present embodiment) is calculated.

Next, the control unit 11 compares the reliability Pkeep stored in the storage unit 17 with the calculated reliability Pnew (reliability comparing steps S16c and S16d). Here, the reliability Pke in which the calculated reliability Pnew is stored
If it is higher than ep, the positioning result Gnew is transmitted to the information processing center 20 as new position information Gpos (update of position information and transmission step S16e). Then, the detected positioning result Gnew and the calculated reliability Pnew
Is the stored positioning result Gkeep and reliability Pke
It is stored in the storage unit 17 as ep (the positioning result and reliability update step S16f stored in the storage unit). In this way, by generating position information for a specific positioning result instead of generating position information for all positioning results, it is possible to reduce cost and load on communication and processing. . Also, at this time, the accuracy of the position information can be improved by generating the position information based on the highly reliable positioning result selected and sorted according to the reliability.

The control unit 11 determines the calculated reliability P
If the new and the stored reliability Pkeep are equal (step S16d), the positioning result Gkeep and the reliability Pkeep stored in the storage unit 17 are updated (step S16).
f) is performed, but the position information Gpos is updated (step S16).
e) is not performed. If the reliability is equal, it is difficult to determine which positioning result is correct. For this reason,
The location information Gpos is not updated in order to reduce the number of times of communication between the site terminal 10 and the information processing center 20.

When a response request is received from the information processing center 20, information is transmitted in response to the response request (information transmission step S17 in response to a request from the center). More specifically, in step S17, first, when the reception of the response request is detected (response request reception detection step S17a), the presence or absence of the position information transmission request is detected (the position information transmission request reception detection step). S17b) If there is a position information transmission request, the positioning result Gkeep accumulated in the storage unit 17 is transmitted as the position information Gpos (position information transmission step S17).
c) If there is no position information transmission request, only the traffic obstacle identifier is transmitted to the information processing center 20 (transmission obstacle identifier transmission step S17d).

The information transmission from the site terminal 10 to the active information processing center 20 is performed as follows (the information transmission step S1 from the terminal to the active information center).
8). When detecting a change in the changeover switch 13f for distinguishing between work and non-work (operation / non-work change detection step S18a), the control unit 11 automatically transmits the change to the information processing center 20 (work / non-work). Work information transmission step S18
b). That is, the control unit 11 functions as a traffic obstacle state change detection unit (a work state change detection unit) that detects a change in the work situation (that is, a change between work and non-work in the present embodiment) as a change in the state of the traffic obstacle. . As described above, in the present embodiment, the traffic obstacle information is immediately sent to the information processing center 20 according to the change in the site situation. For this reason, traffic information is generated accurately and in real time.

When the transmission command switch 13h for instructing the transmission of traffic regulation information is turned on, ie, when a transmission command is detected (transmission command switch ON detection step S18c), the traffic regulation information is transmitted to the information processing center 20 (traffic regulation information). Transmission step S18d). When the traffic regulation information is transmitted, the reception of the reception confirmation notice from the information processing center 20 is detected, and when the notification is not received, the traffic regulation information is transmitted again to the information processing center 20 (the reception confirmation notice). Detection step S18e).

The control unit 11 confirms the line connection based on the communication interval information acquired in step S15d (line connection confirmation step S19). More specifically, in this step S19, first, when it is detected that a predetermined time (for example, a time interval specified by the communication interval information) has elapsed since the last communication with the information processing center 20 (elapsed time) In the detection step S19a), a line connection operation is performed (line connection operation execution step S19b). The line connection state is detected (line connection state detection step S19c), and if the line connection state is good, work / non-work information is transmitted to the information processing center 20 (transmission of work / non-work information). Step S19
d). If the line connection is not confirmed in the step 19c, or if the line connection state is not good, the process returns to the step 19b and the line connection is tried again. As described above, by transmitting the information at the predetermined communication interval, the information processing center 20 can determine the end of the traffic obstacle with high accuracy and without increasing the load on the communication and the processing.

Steps S16 to S19 are repeated until the power is turned off by the power switch 13g.

Next, the operation of the information processing center 20 will be described. FIG. 15 is a flowchart showing the operation of the information processing center 20, and FIG. 16 is a flowchart showing the processing steps of traffic obstacle scene information.

The control unit 21 of the information processing center 20 considers that the traffic obstacle in the site terminal 10 has ended when the communication from the site terminal 10 at a predetermined communication interval is interrupted. More specifically, the control unit 21 detects line connection from the site terminal and reception of terminal information from the site terminal 10 (line connection detection step S21 from the site terminal, reception of terminal information from the site terminal). In the detection step S22), if the terminal information has not been received, it is determined whether or not a predetermined time (for example, a communication interval time specified in the communication interval information) has elapsed since the last communication with the site terminal 10. (Elapsed time determination step S30). If the time corresponding to the communication interval has elapsed, information including the response request is transmitted to the site terminal 10 (response request transmission step S31). After transmitting the response request, the control unit 21 detects the reception of the terminal information from the site terminal 10 (the terminal information reception detection process S32 for the response request),
For example, when the reception of the terminal information is not detected within the predetermined time, it is considered that the traffic obstacle in the on-site terminal 10 has been completed (the only traffic obstacle-free termination step S33).
In the case where the end of the traffic obstacle is determined based on the end confirmation notification from the site terminal 10, if the end confirmation notification is not transmitted due to some cause, for example, forgetting to transmit, it is possible to determine the end of the traffic obstacle. Can not. According to such a configuration, the end of the traffic obstruction can be determined without transmitting the end confirmation notification from the site terminal 10, so that the end of the traffic obstruction can be more accurately estimated.

The control unit 21 determines whether or not the traffic obstacle considered to be ended has definitely ended by updating the traffic obstacle handled by the site terminal 10. More specifically,
The controller 21 detects the reception of the terminal information from the site terminal 10 (step S2 for detecting the reception of the terminal information from the site terminal).
2) If this is detected, the traffic obstacle identifier included in the terminal information is compared with a known traffic obstacle identifier registered in the storage unit 22, and the traffic obstacle identifier is known or new. (Step S23 for determining novelty of traffic obstacle). In the present embodiment, since the traffic obstruction identifier includes an on-site terminal identifier unique to each on-site terminal, the new traffic obstruction identifier includes the on-site terminal identifier of the on-site terminal that has started handling a new traffic obstruction. Will be. Therefore, the control unit 21 refers to the storage unit 22 and includes, in the stored traffic obstacle identifier stored here, the field terminal identifier included in the new traffic obstacle identifier (that is, the handling of the new traffic obstacle is started). If the traffic obstacle identifier is included, the traffic obstacle to which the traffic obstacle identifier is assigned is determined to have been terminated (traffic obstacle end determination step S26). In this way, by setting an identifier for each site mechanism that handles a traffic obstruction, the end of the traffic obstruction can be determined more reliably. The control unit 21 newly registers the new traffic obstacle identifier in the storage unit 22 (new traffic obstacle identifier registration step S27).

Next, the control unit 21 generates communication interval information indicating a communication interval for the traffic obstacle. On this occasion,
The control unit 21 generates communication interval information based on a current communication state or a predicted future communication state. The control unit 21 stores the generated communication interval information in the storage unit 22 in association with the new traffic obstacle identifier.
0 (the transmission step S of the communication interval information).
28). The site terminal 10 stores the received communication interval information in the storage unit 17 and periodically transmits the terminal information to the information processing center 20 at the communication interval indicated by the communication interval information.
Thus, overload of the information processing center 20 in information exchange with the plurality of site terminals 10 can be suppressed, and traffic information can be generated and provided smoothly and accurately.

In the present embodiment, it is considered that the traffic obstacle is terminated based on the interruption of the communication from the site terminal 10 in the step S33. However, the communication may be interrupted due to, for example, a communication obstacle. The traffic obstruction is considered terminated even though it is not actually terminated.
For this reason, in the present embodiment, the control unit 21 refers to the storage unit 22 and determines, based on the traffic obstacle identifier, whether or not the traffic obstacle related to the received terminal information is a traffic obstacle that has already been determined to be terminated ( In the step S24 for determining whether or not the traffic obstacle has been regarded as the end, if it has already been regarded as the end, this is canceled (the step S25 for canceling the deemed end for the traffic obstacle).

The end situation of the traffic obstacle is shown in FIG.
As shown in FIG. 5, the data is classified into three types: unfinished: 0, assumed end: 1, end confirmed: 2, and stored in the storage unit 22 in association with the traffic obstacle identifier.

When terminal information is received from the on-site terminal 10, after determining the novelty of the traffic obstruction relating to this terminal information, processing of the traffic obstruction site information contained therein is performed (processing of the traffic obstruction site information). Step S29). More specifically, the control unit 21 accumulates the traffic obstruction site information in the storage unit 22 in association with the traffic obstruction identifier (accumulation process of traffic obstruction site information S29a). Next, if the traffic obstruction site information includes the traffic regulation information (traffic control information presence / absence determination step S29b), a reception confirmation notification is transmitted to the site terminal 10 as center information (transmission of the reception confirmation notification). Step S29c). That is, a reception confirmation notification is transmitted only when information of high importance, for example, traffic regulation information is received,
Reduce communication load.

The present invention is not limited to the above embodiment. In the above-described embodiment, the presence / absence of D-GPS reception and the number of captured satellites are used as the reception status for calculating the reliability. However, the present invention is not limited to this. For example, the level of a received radio wave may be used as the reception status. The higher the reception level of the received radio wave, that is, the higher the reception intensity, the higher the position detection accuracy. Therefore, the accuracy of the position information can be improved, and the cost and load in communication and information processing can be reduced.

The calculation of the position information based on the positioning result is not limited to the above embodiment. For example, the position information may be calculated as an average value of a plurality of positioning results.
At this time, for example, it may be calculated as an average of positioning results having a higher reliability than a predetermined reliability. Further, the position information may be calculated as a weighted average of a plurality of positioning results using the reliability as a weighting coefficient. Also in these cases, since the position information can be calculated based on the positioning results smaller than the number of all the positioning results according to the reliability, the accuracy of the position information can be improved, the cost in communication and information processing can be reduced, and The load can be reduced.

In the above embodiment, the on-site terminal is configured as a post cone installed on the road, but this may be configured as an on-board terminal mounted on a patrol car. The input unit may be a keyboard and the output unit may be a display.

The traffic obstacle site information targeted by the present system is not limited to the above embodiment. For example, traffic regulation information may include regulation of a vehicle type that can pass, speed regulation, chain regulation, or the like, or information indicating the cause of a traffic disorder (for example, rainfall, snowfall, fog, etc.) Alternatively, information indicating the road surface condition (for example, flooding, snow cover, freezing, falling objects, etc.) may be included.
Further, the traffic obstacle identifier may be generated based on information indicating a position or an area where a traffic obstacle has occurred, or may be generated using a random number.

[0050]

As described above, according to the present invention,
Since the number of pieces of position information smaller than the number of positionings is generated based on the reliability and the positioning result, the cost for communication and information processing of the position information can be reduced, and the operation load of the system can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a traffic information system according to an embodiment of the present invention.

FIG. 2 is a block diagram of a site terminal of the traffic information system according to the embodiment of the present invention.

FIG. 3 is a block diagram of an information processing center of the traffic information system according to the embodiment of the present invention.

FIG. 4 is a schematic configuration diagram of an operation panel of an operation unit including an input unit and an output unit of a site terminal of the traffic information system according to the embodiment of the present invention.

FIG. 5 is a schematic configuration diagram in which a field terminal of the traffic information system according to the embodiment of the present invention is applied to a post cone.

FIG. 6 is an explanatory diagram showing a history for each traffic obstacle outputted by the traffic information system according to the embodiment of the present invention.

FIG. 7 is a diagram showing a reliability table in the traffic information system according to the embodiment of the present invention.

FIG. 8 is a flowchart illustrating an operation of a site terminal of the traffic information system according to the embodiment of the present invention.

FIG. 9 is a flowchart showing a process of assigning a traffic obstruction identifier at a site terminal of the traffic information system according to the embodiment of the present invention.

FIG. 10 is a flowchart showing a line connection step by a mobile communication unit in a site terminal of the traffic information system according to the embodiment of the present invention.

FIG. 11 is a flowchart illustrating a position detection process in a site terminal of the traffic information system according to the embodiment of the present invention.

FIG. 12 is a flowchart showing a process of transmitting information according to a request from a center in a site terminal of the traffic information system according to the embodiment of the present invention.

FIG. 13 is a flowchart showing a process of actively transmitting information by a site terminal of the traffic information system according to the embodiment of the present invention.

FIG. 14 is a flowchart showing a line connection confirmation process at a site terminal of the traffic information system according to the embodiment of the present invention.

FIG. 15 is a flowchart showing an operation of the information processing center of the traffic information system according to the embodiment of the present invention.

FIG. 16 is a flowchart illustrating a processing step of traffic obstacle site information in the information processing center of the traffic information system according to the embodiment of the present invention.

[Explanation of symbols]

Reference Signs List 1 traffic information system, 10 field terminal (post cone), 11 control unit, 12 position detection unit, 13 input unit, 14 output unit, 15 mobile communication unit, 16 mobile communication antenna, 17 storage unit, 20 information processing center ,
21 control unit, 22 storage unit, 23 communication interface, 24 input unit, 25 output unit, 30 information user terminal, 40 mobile communication network, 50 communication network, T reliability table.

Claims (7)

[Claims] A positioning unit that obtains a plurality of positioning results for a predetermined position; a reliability calculating unit that calculates reliability for each positioning result; and a number of the plurality of positioning results based on the reliability and the positioning results. A position information transmitting device, comprising: position information generating means for generating a smaller number of position information; and transmitting means for transmitting the position information. 2. The apparatus according to claim 1, wherein said positioning means detects a position based on a received radio wave, and said reliability calculating means calculates reliability based on a reception state of said positioning means. Location information transmission device. 3. The position information transmitting apparatus according to claim 2, wherein said reception status includes the number of basic data of positioning by said positioning means. 4. The positioning means comprises a GPS receiving means and a D-
The position information transmitting apparatus according to claim 3, further comprising: a GPS receiving unit, wherein the reception status includes presence or absence of reception of a radio wave by the D-GPS receiving unit. 5. The position information transmitting apparatus according to claim 4, wherein said reception status includes the number of satellites captured by said GPS receiving means. 6. The position information transmitting apparatus according to claim 2, wherein the reception status includes a reception level of a received radio wave. 7. A traffic information system including a site terminal and an information processing center, wherein the site terminal obtains a plurality of positioning results for a predetermined position, and a reliability calculation for calculating reliability for each positioning result. Means, position information generating means for generating a number of pieces of position information smaller than the number of the plurality of positioning results based on the reliability and the positioning result, and transmitting means for transmitting the position information, A traffic information system, characterized in that the center includes traffic information generating means for generating traffic information based on position information from a site terminal.