JP5400402B2 - Current location information notification system, portable terminal device, information center device, and current location information notification method - Google Patents

Description

  The present invention relates to a current position information notification system, a mobile terminal device, an information center device, and a current position information notification method that notify current position information of a moving body to another moving body by wireless communication via the center apparatus.

  Conventionally, a technique for notifying a vehicle driver of information indicating that a pedestrian is present is known in Patent Document 1 below. In this Patent Document 1, position information is transmitted from a mobile terminal held by a pedestrian to a predetermined information center device, the position of the pedestrian on the map is recognized by the information center device, and the recognized position A system for notifying information to a vehicle that is another moving body by wireless communication is described.

Japanese Patent No. 3549850

  However, since the conventional technique described in Patent Document 1 described above periodically acquires pedestrian location information and transmits it to the information center device, the power consumption of the mobile terminal held by the pedestrian There was a problem that the amount would be enormous.

  Therefore, the present invention has been proposed in view of the above-described circumstances, and an object thereof is to reduce the power consumption of a mobile terminal.

  When it is determined that the first moving body is not on the vehicle, the present invention calculates the first predetermined period as the position specifying period and determines that the first moving body is on the vehicle. In this case, based on the moving speed of the first moving body and the predetermined deceleration, a position specifying period that is a second period longer than the first predetermined period is calculated, and the first position calculated in the position specifying period is calculated. The current position information of one mobile unit is transmitted to the second terminal device of the second mobile unit.

  According to the present invention, when the first moving body is on the vehicle, the period for specifying the current position of the moving body by the first terminal device is made longer than when the first moving body is not on the vehicle. Since the cycle for transmitting the current position information of the mobile unit to the second terminal device is also long, it is possible to reduce the power consumption of the first terminal unit associated with the location and communication of the mobile unit.

It is a block diagram shown about the structure of the present location information notification system shown as embodiment of this invention. It is a flowchart which shows a series of procedures at the time of determining whether to perform the period extension of a position specific period and a communication period in the portable terminal device in the present location information notification system shown as an embodiment of the present invention. It is a figure which shows the specific example of the predetermined deceleration for calculating an extension period. It is a figure which shows the specific example of the predetermined deceleration for calculating an extension period, and is a figure which shows the specific example of the predetermined deceleration according to the acceleration / deceleration state just before deceleration. It is a figure for demonstrating the frequency | count of the process per time in a normal period and an extension period.

  Hereinafter, a current position information notification system as a preferred embodiment of the present invention will be described in detail.

[Configuration of current location information notification system]
As shown in FIG. 1, the current location information notification system shown as an embodiment of the present invention includes an information center device 10 that centrally manages the current location information notification system and a plurality of persons (hereinafter referred to as a first mobile unit). Each of the portable terminal devices 20 and the in-vehicle device 30 that is a terminal device mounted on each of a plurality of vehicles that are second moving bodies different from the first moving body. The current position information notification system mainly performs communication between the mobile terminal device 20 and the in-vehicle device 30. Thereby, the current location information notification system can notify the vehicle-mounted device 30 of the current location information of the owner acquired by the mobile terminal device 20. The communication method between the mobile terminal device 20 and the in-vehicle device 30 may be a wireless communication method via a wide area communication network or a direct communication method. In the following, it is assumed that the current position information of the owner acquired by the mobile terminal device 20 is notified to the in-vehicle device 30 via the information center device 10 by a wireless communication method via a wide area communication network.

  The information center apparatus 10 includes an information providing server managed by an operator who operates the current position information notification system. Specifically, the information center device 10 includes a communication unit 11 that performs wireless communication with the mobile terminal device 20 and the in-vehicle device 30, an information storage unit 12 that stores various types of information, and the information center device 10. And a processing unit 13 that performs overall control. In FIG. 1, the information center device 10 is configured by computer hardware including a CPU, a ROM, a RAM, and the like. However, in FIG. .

  The communication unit 11 performs wireless communication via the wide area communication network, receives a message including the current position information of the owner transmitted from the mobile terminal device 20, and supplies the message to the processing unit 13. In addition, the communication unit 11 performs wireless communication via the wide area communication network, and transmits the current position information of the owner to the in-vehicle device 30.

  The information storage unit 12 stores various application software executed by the information center apparatus 10 and data necessary for various processes by the processing unit 13. Information stored in the information storage unit 12 is read out by the processing unit 13.

  The processing unit 13 performs various processes based on messages received from the portable terminal device 20 held by the holder via the communication unit 11. For example, the processing unit 13 acquires the current position information of the owner by performing wireless communication with the mobile terminal device 20. And the process part 13 estimates the difference | error with the present position of the actual portable terminal device 20 which generate | occur | produces when it notifies by performing radio | wireless communication with respect to the vehicle-mounted apparatus 30. FIG. Thereafter, the processing unit 13 performs processing such as correcting the current position information of the owner acquired from the mobile terminal device 20 using the predicted error.

  The mobile terminal device 20 is configured by, for example, a mobile phone device having a call function, a PDA (Personal Digital Assistant (s)), etc., held by the holder who is the first mobile body. Specifically, the mobile terminal device 20 includes a communication unit 21 that performs wireless communication with the information center device 10, a position specifying unit 22 that specifies the current position of the mobile terminal device 20, and the mobile terminal device 20. The moving speed calculating unit 23 that calculates the moving speed of the owner who holds the information, the information storage unit 24 that stores various information, and the processing unit 25 that controls the mobile terminal device 20 in an integrated manner. In FIG. 1, the portable terminal device 20 is configured by hardware by a computer having a CPU, a ROM, a RAM, and the like. However, in FIG. .

  The communication unit 21 transmits a message including the current position information of the owner to the information center apparatus 10 by performing wireless communication via the wide area communication network.

  The position specifying unit 22 includes a so-called GPS (Global Positioning System) receiver. The position specifying unit 22 receives a signal transmitted from a GPS satellite via a GPS antenna under the control of the processing unit 25. Thereby, the position specifying unit 22 performs position measurement by GPS navigation, and acquires the absolute position (latitude, longitude) information of the mobile terminal device 20 as the current position information of the owner. The position specifying unit 22 supplies the acquired current position information of the owner to the processing unit 25.

  The movement speed calculation unit 23 periodically calculates the movement speed of the holder who owns the mobile terminal device 20 every time the current position information is acquired by the position specifying unit 22 under the control of the processing unit 25. To do. For example, the movement speed calculation unit 23 receives a signal transmitted from a GPS satellite via a GPS antenna, and the movement speed calculation unit 23 calculates the movement speed of the owner using the received signal.

Specifically, when the process is performed at the n-th time, the movement speed calculation unit 23 calculates the movement speed Vn of the holder at the n-th position specifying time by the following equation (1). Note that in the following equation _{(1), I n, O} n, T n , respectively, the latitude identified in the n-th by the position specifying unit 22, the longitude, and a time at which to identify these latitudes and longitudes. Similarly, in the following formula (1), I _n−1 , O _n−1 , and T _n−1 are respectively the latitude, longitude, and these latitudes specified by the position specifying unit 22 for the (n−1) th time. And the time at which the longitude was specified.

  The movement speed calculation unit 23 supplies the calculated movement speed information to the processing unit 25. Note that when the mobile terminal device 20 calculates the movement speed based on the information on the current position specified by the position specification unit 22, the movement speed calculation unit 23 may not be provided as an individual functional module. Below, the case where the moving speed calculation part 23 is provided shall be demonstrated.

  The information storage unit 24 stores various application software executed by the mobile terminal device 20 and data necessary for various processes by the processing unit 25. For example, the information storage unit 24 stores a predetermined deceleration value and the like necessary for determining a position extension cycle and a communication cycle cycle extension by the mobile terminal device 20 described later. Here, the position specifying period is an interval at which the position specifying unit 22 specifies the position of the mobile terminal device 20. The communication cycle is an interval at which the communication unit 21 transmits a message including current position information to the information center apparatus 10. These position specifying cycle and communication cycle may be the same or different. In the following description, it is assumed that the position specifying cycle and the communication cycle match. The predetermined deceleration will be described later. Information stored in the information storage unit 24 is read by the processing unit 25.

  In response to the current position information acquired by the position specifying unit 22, the processing unit 25 uniquely identifies at least the identification information for identifying the mobile terminal device 20, the current position information, and the time when the current position information is acquired. Generate a message with and attached. Then, the processing unit 25 transmits the generated message to the information center device 10 via the communication unit 21. In addition, the processing unit 25 determines the position specifying period and the communication period based on the moving speed information of the holder calculated by the moving speed calculating unit 23 in response to the current position information acquired by the position specifying unit 22. It is determined whether or not the period extension is performed. When the period extension is performed, an instruction to extend the position specifying period is issued to the position specifying unit 22, and the communication period is extended to the communication unit 21. Give instructions to that effect.

  The in-vehicle device 30 is mounted on a vehicle that is a second moving body. The in-vehicle device 30 detects the current position of the vehicle, for example, and provides a route guidance to a desired destination while presenting a map corresponding to the current position of the vehicle drawn based on the map data to the driver who is the user. It consists of a navigation device to perform. Specifically, the in-vehicle device 30 includes a communication unit 31 that performs wireless communication with the information center device 10, a position specifying unit 32 that specifies the current position of the vehicle, and an information storage unit 33 that stores various types of information. The processing unit 34 that controls the in-vehicle device 30 in an integrated manner and the information providing unit 35 that provides various types of information to the user are provided. In FIG. 1, the in-vehicle device 30 is configured by hardware by a computer including a CPU, a ROM, a RAM, and the like. However, in FIG.

  The communication unit 31 receives the current position information of the owner transmitted from the information center device 10 by performing wireless communication via the wide area communication network, and supplies the information to the processing unit 34.

  The position specifying unit 32 includes a so-called GPS receiver, and receives a signal transmitted from a GPS satellite through a GPS antenna under the control of the processing unit 34. Thereby, the position specifying unit 32 performs position measurement by GPS navigation, and calculates absolute position (latitude, longitude) information of a vehicle that is a moving body on which the in-vehicle device 30 is mounted. In addition, the position specifying unit 32 calculates the relative position of the vehicle by autonomous navigation based on travel distance information detected by a distance sensor (not shown) and travel direction information detected by an orientation sensor (not shown). And the position specific | specification part 32 calculates the position on the map of the vehicle by which the said vehicle-mounted apparatus 30 is mounted based on absolute position (latitude, longitude) information and relative position information which were mentioned above. The position specifying unit 32 supplies the calculated current position information of the vehicle to the processing unit 34.

  The information storage unit 33 includes various application software executed by the in-vehicle device 30 serving as a navigation device, map data to be displayed on the information providing unit 35, road data used for map matching, route guidance, and the like, such as vehicle navigation and processing. Various data necessary for various processes by the unit 34 are stored. Information stored in the information storage unit 33 is read out by the processing unit 34.

  Based on the current position information calculated by the position specifying unit 32, the processing unit 34 reads various information necessary for vehicle navigation, such as corresponding map data and road data, from the information storage unit 33, and a communication unit. It is acquired from the information center apparatus 10 via the wireless communication via 31. The processing unit 34 causes the information providing unit 35 to present an optimal travel route from the current position to the destination using the destination and the current position information input by the user via an operation switch (not shown). Route guidance for performing route guidance (navigation) to the vicinity of the destination is performed. At this time, the processing unit 34 can also control the information providing unit 35 to execute voice navigation. Further, the processing unit 34 generates a display image to be displayed on the information providing unit 35. For example, the processing unit 34 generates a navigation map as a display image and causes the information providing unit 35 to display the map.

  Furthermore, the processing unit 34 determines whether or not to present information based on the current position information of the holder acquired by wireless communication from the mobile terminal device 20 via the information center device 10 to the user. If it is determined that information based on the current position information of the owner is to be presented, the processing unit 34 generates a display image to which the current position information of the owner is added, for example, and causes the information providing unit 35 to display the display image. The processing unit 34 may present the presence of the owner by voice.

  The information providing unit 35 displays the display image generated by the processing unit 34. The information providing unit 35 is mainly configured by a liquid crystal display or the like installed at a position that is easily visible to the user, such as a position that is easily visible to the driver. The information providing unit 35 is provided, for example, at a substantially central portion in the width direction of the instrument panel of the vehicle. Moreover, the information provision part 35 may be comprised as a touch panel which a user can operate. Furthermore, the information provision part 35 has a speaker which outputs an audio | voice. This speaker is mainly installed at a position where it can be easily heard from the user, such as the left and right side positions of the driver.

[Operation of current location information notification system]
In the above-described current position information notification system, the mobile terminal device 20 operates according to a series of procedures as shown in FIG. 2 and extends the position specifying period by the position specifying unit 22 and the period of the communication cycle through the communication unit 21. Determine whether to do it.

  First, the portable terminal device 20 specifies the current position of the holder who is the first moving body by the position specifying unit 22 in Step S1.

  In the next step S <b> 2, the mobile terminal device 20 calculates the moving speed of the holder using the calculation formula shown in the above formula (1) by the moving speed calculation unit 23.

  Subsequently, in step S3, the mobile terminal device 20 determines whether or not the owner is on the vehicle based on the moving speed information of the owner calculated in step S2 by the processing unit 25. Specifically, the processing unit 25 determines that the owner is riding on a vehicle when the moving speed of the owner is equal to or higher than a predetermined speed threshold, and when the moving speed is less than the speed threshold. Determines that the owner is not in the vehicle. This speed threshold is set to a speed value that exceeds the speed at which a human walks, for example. Note that the processing unit 25 has the rider on the vehicle when the proportion of the plurality of moving speeds calculated continuously in time is equal to or greater than a predetermined speed threshold. May be determined.

  Here, if the portable terminal device 20 determines that the owner is a pedestrian who has not boarded the vehicle, the portable terminal device 20 moves the process to step S7, and the processing unit 25 identifies the position with respect to the position identifying unit 22. An instruction to set the cycle to the normal cycle is issued, and an instruction to set the communication cycle to the normal cycle is issued to the communication unit 21, and the series of processing ends. Accordingly, when the immediately preceding position specifying cycle and communication cycle are normal cycles, the mobile terminal device 20 waits until the next acquisition of the current position information by the position specifying unit 22 without changing the cycle. Will do. In addition, as a normal period, when the owner is walking, it is set as a constant period between 3 second and 5 second as a period which can detect a pedestrian's position appropriately, for example.

On the other hand, if the portable terminal device 20 determines that the owner is on the vehicle, the moving speed information of the owner and the predetermined deceleration calculated by the processing unit 25 in step S2 in step S4. Based on the above, an extended period is calculated by extending the normal period for the position specifying period and the communication period. Specifically, when processing is performed for the nth time, the processing unit 25 calculates the extension period P _n by the following equation (2).

  Here, the predetermined deceleration is the maximum of the decelerations that can be generally generated for the vehicle when the owner is on a vehicle such as a train, a vehicle, or a motorcycle. It is a deceleration. This predetermined deceleration is determined based on the result of investigating the relationship between the use frequency and the deceleration as shown in FIG. 3 for a plurality of vehicles on which the owner is riding, which are randomly extracted. Value. This usage frequency is the ratio of the total deceleration required time during which the vehicle on which the owner is riding is decelerating to the time during which the vehicle is decelerating at the deceleration. FIG. 3 shows an example in which a predetermined deceleration is determined by replacing 90% of the total deceleration required time with a “generally possible” maximum deceleration. That is, when the owner carrying the portable terminal device 20 is on a vehicle, acceleration / deceleration occurs in the vehicle. However, the greater the acceleration / deceleration of the vehicle, the more attention the surroundings have to the position of the vehicle. Therefore, the greater the acceleration / deceleration, the shorter the cycle for specifying the position is required. On the other hand, when the acceleration / deceleration of the vehicle is not large, it is not necessary for the surroundings to pay attention to the vehicle as compared with the vehicle having a large acceleration / deceleration. Therefore, in the present embodiment, it is considered to change the cycle for specifying the position according to the deceleration, but normal acceleration / deceleration falls within a certain range, so when riding on a vehicle, A certain predetermined deceleration was used.

  The processing unit 25 calculates an extended cycle obtained by extending the position specifying cycle and the communication cycle based on the predetermined deceleration determined in this way. Here, it is desirable that the predetermined deceleration is a value that the owner does not generally feel uncomfortable, and is preferably about 0.5 G from the experimental results. This corresponds to the deceleration until the vehicle traveling at 70 km / h stops, for example. Therefore, in this case, the processing unit 25 calculates the extension period as 14 seconds.

  Further, the relationship between the usage frequency and the predetermined deceleration varies depending on the acceleration / deceleration state immediately before the owner decelerates. For example, as shown in FIG. 4, the predetermined deceleration is smaller when the owner is not accelerating than when the owner is accelerating immediately before deceleration.

  Therefore, the processing unit 25 has a plurality of predetermined decelerations corresponding to the acceleration / deceleration state immediately before deceleration stored in the information storage unit 24 based on the owner's moving speed calculated in step S2. The acceleration / deceleration of the person is calculated. Then, the processing unit 25 may select a predetermined deceleration value based on the acceleration / deceleration and calculate the extension period. Thereby, since the portable terminal device 20 can make the extension cycle longer than the extension cycle calculated without considering the acceleration / deceleration of the owner when the owner has not accelerated immediately before deceleration. In addition, it is possible to reduce power consumption required for position identification and communication.

  When the mobile terminal device 20 calculates the extension cycle in this way, in step S5, the processing unit 25 calculates the extension cycle calculated in step S4, the position specifying cycle when the owner is not on the vehicle, and Compare the communication cycle (normal cycle).

  Here, when the extension cycle is less than the normal cycle, the mobile terminal device 20 proceeds to step S7. Then, the processing unit 25 instructs the position specifying unit 22 to set the position specifying cycle after the next cycle as a normal cycle, and sets the communication cycle after the next cycle as a normal cycle. An instruction to that effect is issued, and a series of processing ends.

  On the other hand, when the extension cycle is equal to or longer than the normal cycle, the mobile terminal device 20 proceeds to step S6. Then, the processing unit 25 instructs the position specifying unit 22 to set the position specifying period after the next period as the extension period, and sets the communication period after the next period as the extension period. An instruction to that effect is issued, and a series of processing ends.

  The portable terminal device 20 can determine whether or not to perform the period extension between the position specifying period by the position specifying unit 22 and the communication period by the communication unit 21 according to such a series of procedures. In particular, when the owner is on the vehicle, the mobile terminal device 20 sets a long cycle as the position specifying cycle and the communication cycle among the extended cycle and the normal cycle. Thereby, as shown in FIG. 5, for example, the mobile terminal device 20 can reduce the number of times of processing per time as compared with the case where the position specification and communication are always performed in a normal cycle, and the power required for position specification and communication Consumption can be greatly reduced.

  In addition, although demonstrated as what determines whether the portable terminal device 20 performs the period extension of a position specific period and a communication period, the information center apparatus 10 performs the period extension of the position specific period and communication period by the portable terminal device 20. You may make it judge whether it performs. That is, the information center device 10 has the same functions as the position specifying unit 22 and the movement speed calculation unit 23 in the mobile terminal device 20, and whenever the current position information of the owner is acquired from the mobile terminal device 20 by wireless communication, The moving speed of the owner is calculated, and it is determined whether the owner is on the vehicle based on the calculated moving speed information. Based on the determination result, the information center device 10 determines whether to set the normal cycle or the extension cycle, calculates the extension cycle, and transmits the instruction to the mobile terminal device 20. You may make it set. Even in this case, the mobile terminal device 20 can reduce the number of times of processing per time as compared with the case where the location and communication are always performed in a normal cycle, and the power consumption associated with the location and communication is greatly reduced. can do.

[Effect of the embodiment]
As described above in detail, the current position information notification system shown as the embodiment of the present invention specifies the current position of the holder who is the first moving body for each position specifying period by the position specifying unit 22 and specifies Based on the current position of the first moving body, the moving speed of the owner is calculated by the moving speed calculator 23. Then, the current position information notification system calculates a first predetermined period as the position specifying period when it is determined that the first moving body is not on the vehicle based on the moving speed of the first moving body. In addition, when it is determined that the owner is on the vehicle based on the moving speed of the first moving body, based on the moving speed of the holder and the predetermined deceleration calculated by the moving speed calculating unit 23, A position specifying cycle that is a second cycle longer than the first predetermined cycle is calculated. Thereby, the position specifying unit 22 specifies the current position of the first moving body for each calculated position specifying period, and based on the calculated period, the current position information of the owner is transmitted via the communication unit 21. It transmits with respect to the vehicle-mounted apparatus 30 which the vehicle which is a 2nd moving body has.

  Thereby, according to this current position information notification system, since the cycle for specifying the current position of the holder by the mobile terminal device 20 can be changed, the cycle for specifying the current position of the holder by the mobile terminal device 20 Since the period for transmitting the current position information of the owner to the in-vehicle device 30 is also increased, the position and communication of the owner by the mobile terminal device 20 are not performed unnecessarily. The power consumption of the portable terminal device 20 associated with the processing can be greatly reduced.

  Specifically, according to the present position information notification system, when the processing unit 25 determines that the owner is on the vehicle, the position specifying period by the position specifying unit 22 and the communication by the communication unit 21 are performed. Since the cycle to be performed is extended, the power consumption of the portable terminal device 20 associated with unnecessary position identification and communication by the portable terminal device 20 can be greatly reduced.

  In addition, the current position information notification system is configured such that when it is determined that the owner is on the vehicle, the extension period calculated based on the movement speed of the owner and a predetermined deceleration is calculated by the owner. If the period is equal to or longer than the normal period when the user is not in the vehicle, the period after the next period is set as an extended period extended from the normal period, and the position specifying period and the communication period can be extended. Therefore, according to the present location information notification system, the power consumption of the portable terminal device 20 associated with unnecessary position identification and communication by the portable terminal device 20 can be greatly reduced.

  Further, in this current position information notification system, when it is determined that the owner is on the vehicle, the extension period calculated based on the moving speed of the owner and the predetermined deceleration is less than the normal period. In this case, the period after the next period can be set as a normal period, and the position specifying period and the communication period can be extended. Therefore, according to the current position information notification system, it is possible to prevent a situation where the mobile terminal device 20 does not perform necessary position specification and communication.

  Furthermore, the current position information notification system calculates an acceleration / deceleration immediately before deceleration based on the moving speed of the owner, and when it is determined that the owner is on the vehicle, Based on the predetermined deceleration and the calculated acceleration / deceleration immediately before deceleration, the position specifying cycle and the communication cycle are extended. Therefore, according to this current position information notification system, when the owner is not accelerating immediately before deceleration, the extension period can be made longer than the extension period calculated without considering acceleration / deceleration. In addition, the power consumption of the portable terminal device 20 associated with the location and communication of unnecessary holders by the portable terminal device 20 can be greatly reduced.

  Hereinafter, as a reference, a correspondence relationship between the above-described embodiment and the constituent elements described in the claims is added.

  The “first terminal device” described in the claims corresponds to the “portable terminal device 20” in the above-described embodiment, and the “first mobile body” described in the claims is in the above-described embodiment. The “second terminal device, other terminal device” described in the claims corresponds to the “owner” and corresponds to the “on-vehicle device 30” in the above-described embodiment, and “ The “second moving body, other moving body” corresponds to the “vehicle” in the above-described embodiment, and the “position specifying unit” described in the claims corresponds to the “position specifying unit 22” in the above-described embodiment. Correspondingly, the “movement speed calculation means” described in the claims corresponds to the “movement speed calculation unit 23” in the above-described embodiment, and the “ride determination means, period calculation means” described in the claims. Is “Processing unit 2” in the above-described embodiment. Corresponds to ", the" communication unit "described in the claims corresponds to" communication unit 21 "in the embodiment described above. The “information center device” described in the claims corresponds to the “information center device 10” in the above-described embodiment. Furthermore, the “position acquisition unit” described in the claims about the mobile terminal device corresponds to the “communication unit 11 and the processing unit 13” in the above-described embodiment, and the “movement speed” described in the claims about the mobile terminal device “Calculation means, boarding determination means, period calculation means, and control means” correspond to “processing unit 13” in the above-described embodiment.

  The above-described embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and even if it is a form other than this embodiment, as long as it does not depart from the technical idea according to the present invention, the design and the like Of course, various modifications are possible.

DESCRIPTION OF SYMBOLS 10 Information center apparatus 11, 21, 31 Communication part 12, 24, 33 Information storage part 13, 25, 34 Processing part 20 Portable terminal device 22, 32 Location specific part 23 Movement speed calculation part 30 In-vehicle apparatus 35 Information provision part

Claims (7)

In a current position information notification system for notifying a current position information of a first mobile body having a first terminal device to a second mobile body different from the first mobile body,
Position specifying means for specifying the current position of the first moving body for each position specifying period;
A moving speed calculating means for calculating a moving speed of the first moving body based on a current position of the first moving body specified by the position specifying means;
Boarding determination means for determining whether or not the first moving body is on a vehicle based on the moving speed of the first moving body calculated by the moving speed calculation means;
When the boarding determination means determines that the first moving body is not on the vehicle, the first predetermined period is calculated as the position specifying period, and the boarding determination means determines that the first moving body is When it is determined that the vehicle is on the vehicle, a second longer than the first predetermined cycle is determined based on the moving speed and the predetermined deceleration of the first moving body calculated by the moving speed calculating means. A period calculating means for calculating a position specifying period that is a period of
Communication means for transmitting the current position information of the first mobile unit to a second terminal device of the second mobile unit,
The current position information notifying system characterized in that the position specifying means specifies the current position of the first moving body for each position specifying period calculated by the period calculating means. The period calculating means is configured to extend the position specifying period from the normal period as the first period when the boarding determining means determines that the first moving body is on the vehicle . The current position information notification system according to claim 1 , wherein an extension period is a period of the current position information.   The cycle calculating means is configured to determine the moving speed of the first moving body calculated by the moving speed calculating means and the predetermined amount when the boarding determining means determines that the first moving body is on the vehicle. When the extension period calculated based on the deceleration is equal to or longer than a predetermined normal period when the first moving body is not on the vehicle, the position specifying period is set as the extension period. The present location information notification system according to claim 2. An acceleration / deceleration calculating means for calculating an acceleration / deceleration of the first moving body based on the moving speed of the first moving body calculated by the moving speed calculating means;
The period calculation unit, when the first movable body is determined to be riding in a vehicle by the passenger determination means, the first mobile body is calculated not to be accelerated by the acceleration calculation means 4. The current position information notification according to claim 2 , wherein the extension period is longer than an extension period calculated without considering the acceleration / deceleration of the first moving body. system. A position specifying means for specifying for each position specific cycle a current position of a moving body having a mobile terminal device,
A moving speed calculating means for calculating a moving speed of the moving body based on the current position of the moving body specified by the position specifying means;
Boarding determination means for determining whether or not the moving body is riding on a vehicle based on the moving speed of the moving body calculated by the moving speed calculation means;
When it is determined by the boarding determination means that the moving body is not on the vehicle, the first predetermined period is calculated as the position specifying period, and the moving body gets on the vehicle by the boarding determination means. If it is determined that the position of the moving object is determined, the position specifying is a second period longer than the first predetermined period based on the moving speed and the predetermined deceleration of the moving body calculated by the moving speed calculating unit. A period calculating means for calculating a period;
Communication means for transmitting the current position information of the mobile body to another terminal device possessed by another mobile body different from the mobile body,
The mobile terminal device characterized in that the position specifying means specifies the current position of the moving body for each position specifying period calculated by the period calculating means. In the information center device that notifies the current position information of the first mobile body having the first terminal device to the second mobile body different from the first mobile body by wireless communication,
Position acquisition means for acquiring a current position of the first moving body that is specified and transmitted from the first terminal device for each position specifying period;
A moving speed calculating means for calculating a moving speed of the first moving body based on the current position of the first moving body acquired by the position acquiring means;
Boarding determination means for determining whether or not the first moving body is on a vehicle based on the moving speed of the first moving body calculated by the moving speed calculation means;
When the boarding determination means determines that the first moving body is not on the vehicle, the first predetermined period is calculated as the position specifying period, and the boarding determination means determines that the first moving body is When it is determined that the vehicle is on the vehicle, a second longer than the first predetermined cycle is determined based on the moving speed and the predetermined deceleration of the first moving body calculated by the moving speed calculating means. A period calculating means for calculating a position specifying period that is a period of
An information center device comprising: control means for instructing the first terminal device to specify the current position of the first moving body for each position specifying period calculated by the period calculating means. In the current position information notification method for notifying the current position information of the first mobile body having the first terminal device to a second mobile body different from the first mobile body,
It is determined whether or not the first moving body is on the vehicle based on the moving speed of the first moving body calculated based on the current position of the first moving body specified for each position specifying cycle. ,
When it is determined by the boarding determination means that the first moving body is not on the vehicle, the first predetermined period is calculated as the position specifying period, and the first moving body is on the vehicle. If it is determined that, based on the moving speed of the first moving body and a predetermined deceleration, a position specifying period that is a second period longer than the first predetermined period is calculated,
A current position information notification method, comprising: transmitting the current position information of the first moving body specified for each of the calculated position specifying periods to a second terminal device included in the second moving body.

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