JP4192720B2 - Method for changing position information transmission interval in vehicle position management system - Google Patents

Description

  The present invention relates to management of a communication fee charged when packet communication is performed via a mobile communication network, and in particular, in a vehicle position management system, a position for changing a transmission interval of vehicle position information according to an operation situation. The present invention relates to a method for changing an information transmission interval.

  Conventionally, as shown in FIG. 7, in the vehicle position management system, GPS (Global Positioning System, hereinafter referred to as GPS) as a positioning means by an in-vehicle terminal 14 mounted on a vehicle such as a taxi, an ambulance, a delivery truck, or a route bus. The GPS receiver 17 receives the radio wave of the satellite 15 through the GPS antenna 16 to acquire position information (latitude and longitude) of the host vehicle, and the position information is transmitted to the packet communication network 19 by the cellular phone 18 for packet communication. The position information is received via the communication control unit 21 of the management center 20 and stored in the position management unit 22, converted into an address, etc. It takes the form of displaying the vehicle position on a map and managing each job.

  In the in-vehicle terminal 14, in addition to the position information to the management center 20, the setting management unit 24 transmits the movement information for each movement change, and the position information of the own vehicle is based on the road map display device 23 of the management center 20. In addition, the map display device 25 can display the position of the host vehicle.

  In such packet communication, when one piece of location information is divided into a plurality of packets and communication is performed with destinations and control information attached to each packet, a communication fee is generated. It costs 0.2 yen per packet (128 bytes) for use, and it costs 0.4 yen for 2 packets to communicate the location information of one vehicle once. For example, refer nonpatent literature 1).

  In the conventional communication charge management, the position information transmission interval is set in advance for each vehicle movement in consideration of the monthly communication fee budget, and thereafter the position information is transmitted according to the transmission interval for each vehicle movement. As a result, communication charges are accumulated. In the vehicle location management system, the dynamics of the vehicle change depending on the busy period of business, etc., so data communication that meets the communication fee budget does not occur, and communication charges outside the budget are not generated or the expected traffic (total packet volume) is not reached. There was a problem that was not done. In addition, when the position information transmission interval is changed after being set once, there is a problem in that it takes time to reset the position information.

  For example, as shown in FIG. 8A, if the monthly communication fee budget is 5000 yen for the sake of simplicity, the number of times position information can be transmitted is 5000 yen / 0.2 yen / 2 packets = 12,500. Times. Here, the transmission of the position information is performed every fixed mileage of the vehicle, and if the total mileage actual performance of a certain month is 1250 km, 1250 km ÷ 12500 times = 0.1 km / time, and every 0.1 km Can be sent once. In the past, since the vehicle position management system was operated with this set value set once, if the total mileage for one month exceeds 1250 km or the surplus occurs, the above-mentioned problems occur. It was.

  By the way, in general, there is a technology that sets a limit value for the communication charge of a telephone and regulates the outgoing call. This is a notification that the total call charge of the subscriber exceeds the call charge limit value, and the call is made. By restricting, the call charge of the subscriber is managed (for example, see Patent Document 1). In such a method, the progress is not understood and transmission restrictions are imposed. Therefore, when applied to a vehicle position management system, management is stopped, which may hinder business operations.

In addition, there is a technology that regulates outgoing calls until the amount of data corresponding to a predetermined communication fee is reached during data communication, and effectively uses the communication fee. This is a communication unit price for circuit-switched networks (△ Yen per second) Accordingly, by controlling so that the communication amount per time becomes an appropriate communication amount, the transmission efficiency is improved and the operation cost of the WAN system or the like is reduced (for example, see Patent Document 2). Since such a method cannot be transmitted until a certain amount of traffic is reached, when applied to a vehicle position management system, vehicle position information cannot be regularly managed and transmitted, which may hinder business operations.
“Introduction”, [online], February 7, 2003, NTT DoCoMo, [Search August 7, 2003], Internet <URL: http://bp1.mcsys.nttdocomo.co.jp/brand / case / c030204 _02.html> JP-A-6-85971 JP 9-36857 A

  In view of the above problems, the present invention can set the transmission interval of position information in advance by weighting each movement of the vehicle performing data communication, and change the transmission interval of the position information for each movement of the vehicle from the situation in the middle. Thus, an object of the present invention is to make it possible to effectively operate the vehicle location management work with respect to a preset communication charge limit value.

  In order to solve the above problems, the present invention relates to a limit value for a predetermined period of a communication fee generated by communication of vehicle position information and at least one elapsed point provided in the predetermined period in the vehicle position management system. The communication fee threshold value is set based on the weight set for each vehicle movement by setting a communication fee threshold value and setting the communication fee management unit for managing the communication charge by comparing the threshold and the communication charge. By calculating the use communication fee from the number of times of communication performed according to the information transmission interval, and changing the transmission interval according to a determination result of whether the use communication fee exceeds the threshold, A method for changing a transmission interval of position information in a vehicle position management system, characterized by managing a cumulative amount of communication charges used for a limit value.

  According to the position information transmission interval changing method according to the present invention, it is possible to change the position information transmission interval for each movement of the vehicle from the state of progress in the middle, which is effective for a preset communication charge limit value. Operation of vehicle location management can be performed.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail as examples based on the attached drawings.

  FIG. 1 is a block diagram showing a configuration of a vehicle location management system that employs a location information transmission interval changing method according to the present invention, FIG. 2 is a diagram showing an example of a communication fee management concept according to the present invention, and FIG. 3 is a vehicle location according to the present invention. FIG. 4 is a block diagram showing a (A) communication charge management unit and (B) a setting management unit in the management system configuration. FIG. 4 is a cumulative use communication fee displayed on the (A) display unit in the vehicle position management system configuration according to the present invention. FIG. 5 is a diagram showing an example of change setting of a transmission interval of vehicle position information in the case of excess or surplus, FIG. 5 is a communication fee of the vehicle position management system configuration according to the present invention FIG. 6 is a diagram showing an example of processing by the management unit, FIG. 6 is a diagram showing an example of a calculation formula for a transmission interval for each movement and a threshold for progress in the communication fee management unit of the vehicle position management system configuration according to the present invention, and FIG. Charge management and It is a diagram showing a calculation example of a communication charge management invention.

  In FIG. 1, in the vehicle position management system, a radio wave of a GPS satellite 2 as a positioning means is received via a GPS antenna 3 by a vehicle-mounted terminal 1 mounted on a vehicle such as a taxi, an ambulance, a delivery truck, or a route bus. To acquire the position information (latitude, longitude) of the own vehicle, perform the packet communication via the packet communication network 6 by the mobile phone 5 for packet communication, and the communication control unit 8 of the management center 7 The position information is received via, stored in the position management unit 9, converted into an address, etc., and the vehicle position is displayed on the map of the road map display device 10 together with the vehicle dynamics information to manage the operation of the vehicle. Taking form.

  In addition to the position information, the setting management unit 11 transmits dynamic information for each dynamic change from the in-vehicle terminal 1 to the management center 7.

  In the in-vehicle terminal 1, like the road map display device 10 of the management center 7, the map display device 12 can display the position of the own vehicle based on the position information of the own vehicle.

  In packet communication used when transmitting vehicle position information from the in-vehicle terminal 1, one position information is divided into a plurality of packets, and each packet is communicated with destination and control information. For example, NTT DoCoMo When the Dopa network of the packet communication service is used, a communication fee of approximately 0.2 yen per packet (128 bytes) and 0.4 yen as 2 packets is required to communicate vehicle position information once.

  In the vehicle operation management company, the communication charge management unit 13 of the management center 7 collectively manages communication charges for a plurality of vehicle position information from the reception history of the vehicle position information from the in-vehicle terminal 1.

  Next, an example of a communication fee management concept in which the vehicle position management system configuration of FIG. 1 is applied to taxi vehicle position management will be described with reference to FIG.

In a taxi company, a vehicle location management system is used for dispatching to customers, and dynamic information is sent each time the taxi vehicle dynamics change in the setting management unit 11 of the in-vehicle terminal 1 mounted on each taxi vehicle. Set and send to the management center 7.
Temporary taxi vehicle dynamics are set for the actual vehicle, the empty vehicle, and the forwarding vehicle, and the vehicle position information is initially set to be transmitted every 0.7 km, every 0.3 km, and every 0.5 km. Suppose that This initial setting is set by weighting the position information accuracy, that is, the degree to which the vehicle position information is to be grasped in real time in detail for each movement of the vehicle. A transmission interval (travel distance unit) is calculated by weighting.

  The management center 7 detects taxi vehicle dynamics as one day's worth of processing for communication charge management, converts the communication charges based on the number of communications at the transmission interval for each movement, and calculates the cumulative communication charges for each movement. is doing.

  Then, the used communication charges accumulated up to the previous day and the used communication charges accumulated for each behavior calculated in the processing for the current day are added up.

  On the other hand, the limit value of the used communication fee for a predetermined period and a plurality of elapsed points within the predetermined period are set, and the threshold of the used communication fee from the start of the predetermined period to the elapsed point is set respectively, and the elapsed points are added together An excess or surplus is determined by comparing the used communication charge with a threshold value that is an intermediate progress, and an intermediate progress guide is displayed in relation to the threshold and the combined use communication charge. In addition, the limit value of the communication fee set in advance when receiving the position information is also displayed.

  If the threshold is exceeded, the transmission interval of the minimum weighting dynamics (actual vehicle) is widened with respect to the excess, and if the threshold is surplus, the transmission interval of the maximum weighting dynamics (empty vehicle) is narrowed with respect to the surplus. Then, transmission interval information for changing and setting the transmission interval of the vehicle position information is transmitted from the management center 7 to the in-vehicle terminal 1 to the in-vehicle terminal.

  As for the behavior of the changed taxi vehicle, the vehicle location information is transmitted to the management center 7 at the changed transmission interval, and the communication fee is managed so that the accumulated communication fee for one month is suppressed to the limit value of the communication fee. .

  As described above, as shown in FIGS. 1 and 2, a plurality of in-vehicle terminals and a management center are connected via a communication line, the in-vehicle terminals acquire vehicle position information from positioning means, and the same position information is obtained. In the vehicle position management system that transmits the position information to the management center and receives the position information and manages the position of the vehicle, a predetermined communication fee is generated in the management center by transmitting the position information. A limit value for the period and a plurality of elapsed points within the predetermined period, and a threshold of a communication fee from the start of the predetermined period to the elapsed point are set, respectively, and from the start of the predetermined period to the elapsed point A communication charge management unit is provided for calculating a communication charge for use and determining for each elapsed point whether or not the communication charge exceeds the threshold value. The charge is weighted for each movement of the vehicle, the transmission interval of the travel distance unit of the position information is calculated based on the weighting, and is calculated by converting from the number of communications communicated in the transmission interval, and the communication used By changing the transmission interval according to the determination result of whether or not the charge exceeds the threshold, the accumulated communication charge for the predetermined period can be suppressed within the limit value. It is possible to effectively manage the vehicle position information management work within the limit value range.

  In addition, when the accumulated communication charge exceeds the threshold, the transmission interval of the minimum weighting dynamic can be set widely, and when the accumulated communication charge is surplus with respect to the threshold, Since the transmission interval of the maximum weighting behavior can be set narrowly, vehicle position information management can be flexibly and effectively operated according to the characteristics of each vehicle behavior within the limit value.

  FIG. 3 shows a communication fee management unit 13 and a setting management unit 11 constituting the vehicle position management system according to the present invention. The communication fee management unit 13 includes a setting unit 13a, a statistics unit 13b, a storage unit 13c, a display unit 13d, and a control. The setting management unit 11 includes a setting unit 11a, a storage unit 11b, and a control unit 11c.

  The setting unit 13a sets a limit value accumulated for one month of communication charges, an elapsed point (for example, the number of elapsed days) serving as a threshold value, and a weight for each movement of the vehicle. These set values can be arbitrarily reset according to the operation status of the vehicle position management system.

  The statistical unit 13b calculates the transmission interval for each movement of the vehicle based on the above limit value and weighting, the calculation of the communication charge accumulated for each movement, the calculation of the threshold based on the limit value and the elapsed point, and the charge for the communication charge accumulated. In addition, it is determined whether the accumulated communication charge exceeds or exceeds the threshold.

  The storage unit 13c stores initial set values such as the above-described limit values and elapsed days such as elapsed points, or data calculated by the statistical unit 13b, and these data are displayed on a display unit 13d described later. This is the basic data for the guidance display and setting information.

  The display unit 13d displays setting information that has been changed and set based on the cumulative usage communication charge progress guidance display and the determination result of excess or surplus of the cumulative usage communication charge.

  The control unit 13e controls transmission / reception with other components, converts the number of communication of position information received according to the transmission interval of each movement of the vehicle into the communication charge to be used, stores the arithmetic expression shown in FIG. Is used to perform the calculation.

  On the other hand, the setting unit 11a of the setting management unit 11 sets vehicle dynamics information and serves as a basis for the transmission interval of the vehicle position information determined based on the dynamic information. The movement information is reset every time the movement of the vehicle changes, and is transmitted to the communication fee management unit 13 of the management center 7.

  The memory | storage part 11b has memorize | stored the setting value of the transmission interval of the above-mentioned dynamic information and vehicle position information.

  The control unit 11c controls transmission / reception with other components, and controls transmission / reception of dynamic information and transmission interval information.

  Next, an example of the accumulated usage communication fee progress guidance display and setting information displayed on the display unit of the communication fee management unit 13 will be described with reference to FIG.

  A guidance display area and a setting information display area are provided on one screen of the display unit, and the progress of the accumulated communication charge is displayed in the guidance display area. In the case of the taxi vehicle mentioned above, the accumulated communication charges for the dynamics of the actual car, the empty car, and the forwarding car are totaled every 10 days at the beginning and middle of the month, and the 10th day threshold and the 20th day threshold respectively. The difference is displayed so that it can be compared, and the last 10 days are added up step by step on the 24th, 27th, and 29th days so that the difference from the respective threshold values can be compared. In the case of FIG. 4, the 10th day threshold is exceeded, and the 20th day threshold is surplus, and then the 24th day threshold,... It shows a state in which the charges are suppressed.

  In the setting information area, setting information indicating that the transmission interval of the predetermined dynamic is changed according to the excess with respect to the 10th day threshold and the surplus with respect to the 20th day threshold is displayed. Since the excess difference is 40%, the transmission interval of the location information of the actual vehicle has been changed widely. ”,“ In the middle of the 20th day, the surplus difference is 20%. "The transmission interval of was set to be narrower." Is displayed.

  As described above, as shown in FIG. 4A, the threshold setting interval is shortened step by step with the progress of the predetermined period, thereby managing the position information for each vehicle dynamic in consideration of the position information accuracy. The communication fee can be controlled within the limit value.

  Next, an example of changing the transmission interval of the vehicle position information when the vehicle position information transmission interval is changed in the communication fee management unit 13 when excess or surplus occurs will be described with reference to FIG.

  The dynamics at the bottom left and right represent empty and actual taxi cars, respectively, and both indicate the dynamics immediately before the dynamics change.

  When the dynamic state changes from an empty vehicle state to an actual vehicle state and also changes from an actual vehicle state to an empty vehicle state, the position information transmission interval is changed for each dynamic state.

  These transmission intervals are changed when the used communication fee is calculated to be excessive or excessive with respect to the threshold value and the intermediate progress determination display is executed.

  If the used communication charge is calculated to be exceeded and the intermediate progress indicator is displayed, as shown in the second dynamic from the lower left, immediately after the change to the actual vehicle state, which is the minimum weight, according to the excess equivalent amount The number of possible transmissions is distributed and set stepwise within that range, and in the direction of the top arrow, the transmission interval of the position information of the taxi vehicle in the actual vehicle state is set longer and set stepwise shorter Reset as follows.

  Also, if the used communication fee is calculated as surplus and the intermediate progress discrimination display is executed, as shown in the second dynamic from the lower right, the surplus equivalent immediately after the change to the empty weight state that becomes the maximum weight The number of possible transmissions according to the amount is distributed and set stepwise within that range, and in the direction of the top arrow, the transmission interval of the position information of an empty taxi vehicle is set short and longer stepwise Reset to be set.

  In these examples, the last resetting is reset to the transmission interval of the position information initially set and stored in advance.

  As described above, as shown in FIG. 4B, the positional information is grasped by changing the dynamics corresponding to the weighting considering the positional information accuracy by setting the transmission interval of the positional information step by step immediately after the dynamics change. Thus, the communication charge can be suppressed within the limit value while efficiently operating the dispatching operation.

  Next, an example of processing of the communication fee management unit 13 of the management center 7 will be described with reference to FIG.

  First, a limit value for the communication charge for one month is set (ST1), and a threshold value for the elapse of n days is calculated and set from the limit value for one month (ST2). Then, based on this limit value, a transmission interval is calculated by assigning a weight to each vehicle dynamics (ST3). This transmission interval indicates, for example, the travel distance of the vehicle.

  Then, the transmission interval is set to be transmitted to the in-vehicle terminal for each calculated vehicle behavior (ST4).

  Vehicle position information is acquired from the vehicle of each movement based on the transmission interval set for transmission (ST5), the accumulated use communication charge for each movement is obtained, and the sum of the accumulated use communication charge is calculated every day (ST6). .

  Further, the threshold value for the elapse of n days is compared with the accumulated communication charge for n days (ST7), and the result is displayed as guidance information for the nth day of progress (ST8).

  Here, it is determined whether or not the total communication charge used exceeds the threshold of n days (ST9), and if it exceeds the threshold, the transmission interval of the vehicle position information with the minimum weight is exceeded. If there is a surplus more than the threshold value, the corresponding portion is reset widely (ST10-1), and the transmission interval of the vehicle position information with the maximum weighting is reset so as to narrow the surplus equivalent portion (ST10-2). Re-calculate the transmission interval of the vehicle position information.

  The transmission interval information of the vehicle position information calculated in this way is set to be transmitted to the in-vehicle terminal 1 of each vehicle (ST11), the process proceeds to the acquisition of the vehicle position information in ST5, and the subsequent steps are repeated.

  In addition, n is the number of days in the middle set as appropriate from the number of days in one month, so that the middle course can be arbitrarily set in accordance with the operation mode of vehicle management, such as every one day or every five days. In addition, the suppression effect can be improved with respect to the limit value of the monthly communication charge, and the operation management of the vehicle can be operated more flexibly and effectively.

  Further, instead of weighting each movement, a cumulative communication charge is set, and in ST10-1, the transmission position of the vehicle position information of the movement with the minimum cumulative communication charge is reset to an extent corresponding to the excess. In ST10-2, the cumulative communication charge is reset. The same operation and effect can be obtained even if the transmission interval of the vehicle position information with the maximum charge is replaced with a step of resetting the surplus equivalent portion narrowly.

  FIG. 6 shows an example of a calculation formula for the transmission interval for each movement and the threshold for progress in the communication fee management unit 13, and further, the threshold for progress, the degree with respect to the threshold for progress and the transmission interval to be reset in the display content shown in FIG. An example of the calculation formula is shown.

Assuming that the vehicle position management system manages and manages three dynamics, a dynamics, b dynamics, and c dynamics, transmission intervals for each dynamic (calling travel distances) X1, X2, X3 are:
a Dynamic transmission interval X1 = ((C1 ÷ B1 + C2 ÷ B2 + C3 ÷ B3) ÷ Y) × B1
b Dynamic transmission interval X2 = ((C1 ÷ B1 + C2 ÷ B2 + C3 ÷ B3) ÷ Y) × B2
c Dynamic transmission interval X3 = ((C1 ÷ B1 + C2 ÷ B2 + C3 ÷ B3) ÷ Y) × B3
It is calculated from the formula of

  C1, C2, and C3 are travel distances for each motion, B1, B2, and B3 are weights for each motion, and Y is the number of times position information can be transmitted.

The number of possible transmissions Y is
Y = A ÷ E ÷ F
It is calculated from the formula of Here, A is a limit value of the communication charge for one month, E is the number of packets necessary to transmit the position information once, and F is a packet charge.

The progress threshold AA displayed in the display example of FIG.
AA = A ÷ I × H
It is calculated from the formula of Here, I is the number of months and H is the number of days elapsed.

The degree J (%) with respect to the threshold for progress is
J = (AA ÷ (F × K)) × 100 (%)
It is calculated from the formula of Here, K is the number of used packets.

Then, assuming that the dynamics with the minimum accumulated communication fee or weighting are c dynamics, the transmission interval X31 of c dynamics to be reset is the difference L from the threshold AA for progress,
L = (AA− (F × K))
And the number of possible transmissions YY with the difference L is
YY = L ÷ E ÷ F
And can be calculated by the following equation.

X31 = ((C1 ÷ B1 + C2 ÷ B2 + C3 ÷ B3) ÷ (Y−YY)) × B3
FIG. 8 shows a calculation example based on the conventional communication charge management and the communication charge management of the present invention, and for the sake of simple comparison, the description will be made assuming that the communication charge is managed for only one dynamic vehicle.

  FIG. 8A shows a conventional communication charge management example, in which the transmission interval of vehicle position information is fixed.

  First, if the communication fee budget for one month is set to 5000 yen, the number of transmissions of position information that can be transmitted within 5000 yen is 12,500 times (5000 yen / 0.2 yen / 2 packets = 12,500 times).

  Here, assuming that the actual travel distance of the predetermined movement in the past month is 1250 km, and considering this, the transmission interval of the position information of the above-described dynamic vehicle is 0.1 km (1250 km ÷ 12500 times = 0.1 km, 0 .1 transmission per 1 km).

  Since this transmission interval is a fixed value that is initially set, if the total mileage for the current month is, for example, 1500 km due to changes in the operation status of the vehicle, it will exceed 250 km, and the monthly communication charge budget will be increased. On the other hand, the budget is over 1000 yen (250 km / 0.1 km × 0.4 yen = 1000 yen).

  On the other hand, FIG. 8B shows a communication fee management example of the present invention, which is characterized in that the transmission interval of vehicle position information can be varied.

  Similar to the conventional example, the monthly communication fee budget is set at 5000 yen, the position information can be transmitted 12500 times, the mileage of the predetermined dynamics for the past month is set at 1250 km, and the position information transmission interval is set at 0.1 km. Has been.

  In the present invention, the midway progress is calculated, and the communication fee is managed while changing and setting the transmission interval according to the calculation result. For example, the 10th day threshold is set to 1666 yen, 10 If the cumulative daily communication charge is 2666 yen, it will exceed 1000 yen, so when converted to the number of possible transmissions, it will exceed 2500 times (1000 yen ÷ 0.2 yen ÷ 2 packets = 2500 times over) ).

  The transmission interval of the position information of the dynamic vehicle after the change corresponding to this excess is about 0.13 km (1250 km ÷ (12,500 times−2500 times) = 0.13 km, which can be sent once every 0.13 km).

  In the above embodiment, the case where the vehicle position management system is applied to the management of the position information of the taxi vehicle has been described. However, the present invention is not limited to this, and ambulances, fire engines, police cars, and delivery trucks other than taxi vehicles. It can also be applied to the location information management of vehicles such as route buses, according to the operation system of each vehicle management work, the dynamic characteristics of each vehicle, set the limit value, threshold value, weight for each dynamic, By calculating the position information transmission interval by this weighting and making the position information transmission interval changeable, similar actions and effects can be obtained.

  As described above, the present invention provides a vehicle position management system applied to various vehicles, a limit value for a predetermined period of a communication fee generated by communication of vehicle position information, and at least one or more provided within the predetermined period. Set a communication charge threshold for each elapsed point, and install a communication charge management unit for managing the used communication charge by comparing the threshold and the used communication charge, based on the weight set for each vehicle dynamics The used communication fee is calculated from the number of times communication is performed according to the calculated transmission interval of the position information, and the transmission interval is changed according to a determination result of whether or not the used communication fee exceeds the threshold. Accordingly, it may be anything that manages the total of the used communication charges for the limit value.

  In the above-described embodiment, the case where the transmission interval of the vehicle position information is set to a predetermined mileage unit has been described. However, the present invention is not limited to this and can be applied to a case where the unit is a fixed time unit. However, if the stop time becomes longer due to road traffic conditions or the like, the position information is automatically transmitted even if the position information does not change. Therefore, in consideration of this, a limit value for a predetermined period of the communication fee is set. Furthermore, as an application example, a fixed time unit and a predetermined travel distance unit may be used in combination.

  Further, in the above-described embodiment, the case where the threshold setting interval is shortened stepwise as the progress within the predetermined period has been described, but the present invention is not limited to this, and the setting interval is set within the predetermined period. It may be set according to the operation system of various vehicle management tasks, such as making it longer or evenly spaced.

  Furthermore, in the above-described embodiment, when the threshold is exceeded, attention is paid to the dynamic with the smallest weight, and when there is a surplus than the threshold, the transmission interval of the vehicle position information is focused on the dynamic with the highest weight. Although the case where the resetting is performed has been described, the present invention is not limited to this, and as described above, which dynamics should be focused on according to the operation system of the management operation of each vehicle and the characteristics of the dynamics of each vehicle May be determined as appropriate, and the transmission interval of the vehicle position information may be reset.

It is a block diagram which shows the vehicle location management system structure which employ | adopted the transmission interval change method of the positional information by this invention. It is a figure which shows an example of the communication charge management concept in the transmission interval change method of the positional information by this invention. It is a block diagram which shows the (A) communication charge management part and (B) setting management part of the vehicle position management system structure which employ | adopted the transmission interval change method of the positional information by this invention. (A) In the vehicle position management system configuration according to the present invention, (A) shows an example of progress guidance display and setting information of the accumulated communication charge displayed on the display unit, and (B) a transmission interval of vehicle position information in the case of excess or surplus It is a figure which shows an example of this change setting. It is a figure which shows the process example of the communication charge management part of the vehicle location management system structure by this invention. It is a figure which shows an example of the calculation formula of the transmission interval for every dynamics in the communication charge management part of the vehicle position management system structure by this invention, and the threshold value for progress. It is a block diagram which shows the conventional vehicle position management system structure. It is a figure which shows the example of calculation of the conventional communication charge management and the communication charge management of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 In-vehicle terminal 2 GPS satellite 3 GPS antenna 4 GPS receiver 5 Mobile phone 6 Packet communication network 7 Management center 8 Communication control part 9 Location management part 10 Road map display device 11 Setting management part 11a Setting part 11b Storage part 11c Control part DESCRIPTION OF SYMBOLS 12 Map display apparatus 13 Communication charge management part 13a Setting part 13b Statistics part 13c Memory | storage part 13d Display part 13e Control part 14 In-vehicle terminal 15 GPS satellite 16 GPS antenna 17 GPS receiver 18 Mobile phone 19 Packet communication network 20 Management center 21 Communication Control unit 22 Position management unit 23 Road map display device 24 Setting management unit 25 Map display device

Claims (2)

In the vehicle position management system, a limit value for a predetermined period of a communication fee generated by communication of vehicle position information, and a threshold value for a communication fee for at least one elapsed point provided in the predetermined period, respectively, A communication charge management unit that manages the use communication charge by comparing a threshold and use communication charge is installed, and the number of times communication is performed according to the transmission interval of the position information calculated based on the weight set for each movement of the vehicle The usage communication fee is calculated from the above, and the transmission interval is changed according to the determination result of whether or not the usage communication fee exceeds the threshold value. A position information transmission interval changing method in a vehicle position management system, characterized by comprising: A plurality of in-vehicle terminals and a management center are connected via a communication line, the in-vehicle terminal acquires vehicle position information from positioning means, transmits the same position information to the management center, and the management center In the vehicle location management system that receives the location information and manages the location of the vehicle, a limit value for a predetermined period of a communication fee generated by transmission of the location information in the management center, and a plurality of values within the predetermined period Elapse points are set, thresholds of communication charges from the start of the predetermined period to the elapse points are respectively set, use communication charges from the start of the predetermined period to the elapse points are calculated, and the use communication charges are A communication fee management unit is provided for determining whether or not the threshold value is exceeded for each elapsed point, and the used communication fee is important for each movement of the vehicle. The transmission interval of the mileage unit of the position information is calculated based on the weighting, and is calculated by converting from the number of communications communicated in the transmission interval, and the used communication fee exceeds the threshold value. Transmission of location information in a vehicle location management system, wherein the transmission interval is changed in accordance with a determination result of whether or not there is, so that a cumulative total of the used communication charges for the predetermined period is suppressed within the limit value. How to change the interval.

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