JP6986021B2 - Communication system, transmitter, receiver, transmitter control method, receiver control method, and program - Google Patents

Description

The present technology relates to a communication system, a transmitting device, a receiving device, a processing method in these, and a program for causing a computer to execute the method. More specifically, the present invention relates to a communication system for acquiring location information, a transmitting device, a receiving device, a processing method in these, and a program for causing a computer to execute the method.

Conventionally, a satellite navigation system (GNSS: Global Navigation Satellite System) has been known as a system that receives radio waves from a plurality of satellites and obtains the position of a receiver. The positioning data acquired by this GNSS receiver includes various information such as positioning time and altitude in addition to position information such as longitude and latitude. In a system in which a receiver wirelessly transmits its positioning data to another wireless device, a configuration has been proposed in which only information necessary for the wireless device is selected and transmitted for the purpose of reducing the amount of communication (for example, patent documents). See 1.). For example, if the radio needs latitude and longitude and positioning time, but altitude is not required, the rest of the information excluding altitude is transmitted.

Japanese Unexamined Patent Publication No. 2006-129128

In the above-mentioned prior art, the receiver can acquire the position of the receiver by transmitting the longitude and latitude to the radio. However, there is a problem that the communication volume in the system increases as the transmission frequency of longitude and latitude increases. In particular, when the receiver or radio operates on a battery, power consumption increases as the amount of communication increases, and countermeasures are required.

This technology was created in view of such a situation, and aims to reduce the amount of communication in a communication system that acquires location information.

The present technology has been made to solve the above-mentioned problems, and the first aspect thereof is a transmission device that acquires and transmits relative position information indicating a relative position from a predetermined reference point, and a predetermined one. It is a communication system including a receiving device that stores the registered position information of the above in advance and estimates the position information from the relative position information and the registered position information when the relative position information is received. This has the effect of estimating the position information from the transmitted relative position information and the registered position information.

Further, in the first aspect, the transmission device acquires the relative position information from the position information including the area position information indicating the position of the measured area and the relative position information, and the registered position information is the registered position information. It may be position information indicating the position of a specific area. This has the effect of estimating the position information from the relative position information and the registered position information indicating the position of a specific area.

Further, in the first aspect, one of the transmitting device and the receiving device performs a predetermined calculation for calculating the position information of the transmitting device when the transmitting device exceeds the boundary of the specific area. May be executed. This has the effect of calculating the position information by executing the calculation.

Further, in the first aspect, a predetermined buffer area is set in the vicinity of the boundary, and one of the transmitting device and the receiving device performs the transmission based on the predetermined buffer area and the relative position information. It may be determined whether the device has crossed the above boundaries. This has the effect of determining whether or not the transmitting device has crossed the boundary based on the buffer region and the relative position information.

Further, in this first aspect, the registered position information includes the longitude of the specific region, and one of the transmitting device and the receiving device is 180 degrees when the transmitting device crosses the meridian of 0 degrees. The direction of the above longitude may be reversed when the meridian is crossed. This has the effect of reversing the direction of longitude when the transmitter crosses the meridian.

Further, in this first aspect, the registered position information includes the latitude of the specific region, and one of the transmitting device and the receiving device is the direction of the latitude when the transmitting device crosses the equator. May be inverted. This has the effect of reversing the direction of latitude when the transmitter crosses the equator.

Further, in the first aspect, the registered position information is information indicating the position of the predetermined reference point, and the transmitting device stores the registered position information in advance and acquires the position information. The difference between the position information and the registered position information may be transmitted as the relative position information. This has the effect that the difference between the position information and the registered position information is transmitted as relative position information.

Further, in the first aspect, the receiving device may display the position of the transmitting device indicated by the position information on the display unit. This has the effect of displaying the position of the transmitter.

Further, in this first aspect, the position information indicates the measured values of degrees, minutes and seconds of latitude and longitude, and the relative position information is the measured values of the minutes and seconds of the degrees, minutes and seconds. It may indicate. This has the effect of transmitting relative position information indicating the measured values of minutes and seconds.

Further, in the first aspect, the position information indicates a measured value in milliseconds of latitude and longitude, and the relative position information indicates a lower digit among the upper digit and the lower digit of the measured value. May be good. This has the effect of transmitting relative position information indicating the measured value of the lower digit.

A second aspect of the present technology is a transmission device including a position information acquisition unit that acquires relative position information indicating a relative position from a predetermined reference point, and a transmission unit that transmits the relative position information. It is a control method and a program for causing a computer to execute the method. This has the effect of transmitting relative position information out of the position information.

Further, the third aspect of the present technology is a storage unit that stores predetermined registration position information, a reception unit that receives relative position information indicating a relative position from a predetermined reference point, the relative position information, and the registration. It is a receiving device including a position information and a guessing unit for estimating position information from the position information, a control method thereof, and a program for causing a computer to execute the method. This has the effect that the position information is estimated from the relative position information and the registered position information.

According to the present technology, in a communication system for acquiring location information, it is possible to exert an excellent effect that the amount of communication can be reduced. The effects described herein are not necessarily limited, and may be any of the effects described in the present disclosure.

It is an overall view which shows one configuration example of the communication system in 1st Embodiment of this technique. It is a block diagram which shows one configuration example of the positioning terminal in 1st Embodiment of this technique. It is a figure which shows an example of the format of the positioning information in the 1st Embodiment of this technique. It is a figure which shows an example of the positioning information in the 1st Embodiment of this technique. It is a figure which shows an example of the data structure of the position information in the 1st Embodiment of this technique. It is a figure which shows an example of the area which a region position information shows and the relative position which a relative position information shows in 1st Embodiment of this technique. It is a block diagram which shows one configuration example of the user terminal in 1st Embodiment of this technique. It is a figure for demonstrating the data processing in the 1st Embodiment of this technique. It is a flowchart which shows an example of the transmission process in 1st Embodiment of this technique. It is a flowchart which shows an example of the reception process in 1st Embodiment of this technique. It is a figure for demonstrating the registered position information and a guard band in the 2nd Embodiment of this technique. It is a figure for demonstrating the calculation of the longitude in the 2nd Embodiment of this technique. It is a figure for demonstrating the process at the time of crossing a 0 degree meridian and an equator in the 2nd Embodiment of this technique. It is a flowchart which shows an example of the reception processing in the 2nd Embodiment of this technique. It is a flowchart which shows an example of the registration position information calculation processing in the 2nd Embodiment of this technique. It is a flowchart which shows an example of the latitude calculation processing in the 2nd Embodiment of this technique. It is a flowchart which shows an example of the longitude calculation processing in the 2nd Embodiment of this technique. It is a figure which shows an example of the data structure of the arithmetic information which is transmitted at the time of determining whether or not the positioning terminal 110 in the 2nd Embodiment of this technique has crossed a boundary. It is a block diagram which shows one configuration example of the positioning terminal in the 1st modification of this technique. It is a figure for demonstrating the difference operation in the 1st modification of this technique. It is a figure for demonstrating the data processing in the 1st modification of this technique. It is a flowchart which shows an example of the transmission processing in the 1st modification of this technique. It is a flowchart which shows an example of the reception process in the 1st modification of this technique. It is a figure which shows the movement path across the meridian of 180 degrees and the equator in the 2nd modification of this technique.

Hereinafter, embodiments for carrying out the present technology (hereinafter referred to as embodiments) will be described. The explanation will be given in the following order.
1. 1. First embodiment (example of transmitting only relative position information)
2. 2. Second embodiment (example of transmitting only relative position information and determining whether or not the area has been crossed)

<1. First Embodiment>
[Communication system configuration example]
FIG. 1 is an overall view showing a configuration example of a communication system 100 according to a first embodiment of the present technology. This communication system includes a positioning terminal 110 and a user terminal 120. This communication system is used, for example, for parents, caregivers and owners to watch over children, the elderly and pets.

The positioning terminal 110 measures the position of the positioning terminal 110 itself. As the positioning terminal 110, for example, a mobile device such as a GPS (Global Positioning System) receiver that is small enough to operate with a button battery is assumed. The positioning terminal 110 receives radio waves from a plurality of GNSS satellites 500 and generates positioning information based on the radio waves. Then, the positioning terminal 110 wirelessly transmits a part of the positioning information to the user terminal 120 via the base station 510. The details of the information to be transmitted will be described later. Alternatively, the positioning terminal 110 directly transmits a part of the positioning information to the user terminal 120 without going through the base station 510. The positioning terminal 110 is an example of the transmission device described in the claims. In addition to the GPS receiver, a smartphone, a tablet terminal, a notebook personal computer, or the like may be used as the positioning terminal 110.

The user terminal 120 displays the position of the positioning terminal 110. As the user terminal 120, for example, a mobile device such as a smartphone, a tablet terminal, or a notebook personal computer is assumed. The user terminal 120 displays the position of the positioning terminal 110 based on the information received from the positioning terminal 110. For example, the user terminal 120 displays a map and displays a predetermined mark indicating the position of the positioning terminal 110 on the map.

The positioning terminal 110 is carried by a child or the like, and the user terminal 120 is carried by a guardian or the like. By displaying the position of the positioning terminal 110 on the user terminal 120, the guardian or the like can grasp the current location of the child or the like. Since these positioning terminals 110 and user terminals 120 are usually operated by batteries, it is required to reduce the amount of communication from the viewpoint of reducing power consumption.

The communication system 100 is provided with one positioning terminal 110 and one user terminal 120, but the configuration is not limited to this. When watching over a plurality of children and the like, a plurality of positioning terminals 110 may be provided, and when a plurality of adults and the like want to confirm the positions, a plurality of user terminals 120 may be provided. In this case, the correspondence between the transmitting side and the receiving side is not limited to one-to-one. For example, when one guardian or the like watches over a plurality of children or the like, one user terminal 120 is associated with the plurality of positioning terminals 110, and the positioning terminal 110 has relative position information to the user terminal 120. To send. Further, one positioning terminal 110 may transmit relative position information to a plurality of user terminals 120.

[Positioning terminal configuration example]
FIG. 2 is a block diagram showing a configuration example of the positioning terminal 110 according to the first embodiment of the present technology. The positioning terminal 110 includes a control unit 111, a GNSS receiving unit 112, a data processing unit 113, and a transmitting unit 114.

The control unit 111 controls the entire positioning terminal 110. For example, the control unit 111 controls the GNSS receiving unit 112, the data processing unit 113, and the transmitting unit 114 to start the operation at regular intervals or when a predetermined operation is performed by the user.

The GNSS receiving unit 112 receives radio waves from the GNSS satellite. The GNSS receiving unit 112 supplies the received information superimposed on the received radio wave to the data processing unit 113. This received information includes, for example, the three-dimensional coordinates of the GNSS satellite and the transmission time.

The data processing unit 113 processes the received information and measures the position of the positioning terminal 110. The data processing unit 113 obtains the three-dimensional coordinates of the positioning terminal 110 from the three-dimensional coordinates and the transmission time of each of the plurality of GNSS satellites. Then, the data processing unit 113 converts the obtained three-dimensional coordinates into position information consisting of latitude and longitude, and generates positioning information including the position information and the reception time. Then, the data processing unit 113 extracts a part of the positioning information and supplies it to the transmission unit 114. The data processing unit 113 is an example of the position information acquisition unit described in the claims.

The transmission unit 114 wirelessly transmits the information extracted by the data processing unit 113 to the user terminal 120.

FIG. 3 is a diagram showing an example of a positioning information format according to the first embodiment of the present technology. When using the NMEA (National Marine Electronics Association) 0183 standard, first, the start character "$" of the message is transmitted. Next, a talker ID (IDentifier) that identifies the caller is transmitted. If it is a GPS module, "GP" is set for the talker ID, and if it is a GLONASS (Global Navigation Satellite System) module, "GL" is set. The message type is then sent. Here, since the CGA message is illustrated, "CGA" is set as the message type.

Then, the positioning time is transmitted in the UTC (Universal Time, Coordinated) format. Then the latitude is transmitted. Latitude is expressed in degrees, minutes and seconds. For example, if it is 36 degrees 45 minutes 53 seconds, "3645.5300" is transmitted as the latitude. Then the latitude direction is transmitted. If the direction is north, "N" is transmitted, and if the direction is south, "S" is transmitted.

Then the longitude is sent. Longitude is expressed in degrees, minutes and seconds. For example, if it is 137 degrees 9 minutes 52.26 seconds, "13709.5226" is transmitted as the latitude. Then the longitude direction is transmitted. If the direction is east, "E" is transmitted, and if the direction is west, "W" is transmitted.

The geographical position of the positioning terminal 110 is specified by the above-mentioned latitude, latitude direction, longitude, and longitude direction. Information consisting of these latitudes, longitudes, and their directions is hereinafter referred to as "position information". Not all of the location information is transmitted to the user terminal 120, but only a part of it is transmitted. Information other than position information (positioning time, etc.) is appropriately transmitted as needed.

Subsequently, the positioning method is transmitted. In the case of independent positioning, "1" is transmitted, and in the case of differential positioning, "2" is transmitted. Then, the number of satellites used, the horizontal accuracy index, the height of the antenna, and the unit of the height are transmitted in order. Then, the number of seconds from when the correction data is transmitted until it is used is transmitted. Next, the ID (IDentifier) of the correction data transmitting station is transmitted, and finally the checksum is transmitted.

Although the positioning terminal 110 generates the positioning information of the NMEA 0183 standard, the positioning terminal 110 may generate the positioning information of another standard.

FIG. 4 is a diagram showing an example of positioning information in the first embodiment of the present technology. The positioning information includes a start character, a talker ID, a message type, a time, a position information, and the like in the order of transmission.

FIG. 5 is a diagram showing an example of a data structure of position information in the first embodiment of the present technology. In the figure, a is an arrangement of items included in the position information in the order of transmission. The position information includes the latitude, the direction of the latitude, the longitude, and the direction of the longitude in the order of transmission. Here, latitude and longitude are expressed in degrees, minutes and seconds, with degrees listed first, followed by minutes and seconds.

Here, assuming that the value of "degree" of latitude is x (x is an integer) and the value of "degree" of longitude is y (y is an integer), the value and orientation of each "degree" of latitude and longitude Indicates a rectangular area surrounded by latitude lines of x and x + 1 and longitude lines of y and y + 1. Therefore, the information indicating the respective "degrees" and directions of latitude and longitude is hereinafter referred to as "regional position information".

In addition, the values of "minute" and "second" of latitude and longitude are relative positions from the reference point where both "minute" and "second" are "0" in the area indicated by the area position information. Is shown. Therefore, the information indicating the "minutes" and "seconds" of latitude and longitude, respectively, is hereinafter referred to as "relative position information".

As described above, the position information includes the area position information and the relative position information. Therefore, as shown in b in FIG. 5, the data structure of the position information can be represented.

FIG. 6 is a diagram showing an example of a region indicated by region position information and a relative position indicated by relative position information in the first embodiment of the present technology. The earth's surface plane is divided into multiple regions by latitude and longitude lines in units of "degrees". Since one degree of latitude and longitude can be converted into about 111 kilometers (km), each of the divided areas is a rectangular area of about 111 kilometers (km) square. The position information indicating a specific area among these areas is registered in advance in the user terminal 120 as the registration position information. The specific area to be registered is hereinafter referred to as a "registered area". Since the surface of the earth is a spherical surface, the latitude line and the longitude line are not strictly straight lines but curved lines, but in the figure, the latitude lines and longitude lines are represented by straight lines for convenience of description.

Here, the latitude is from 0 degrees to 90 degrees, and the longitude is from 0 degrees to 180 degrees. Therefore, the latitude "degree" can be represented by 7 bits or more, and the longitude "degree" can be represented by 8 bits or more. When the latitude "degree" is represented by 7 bits, the upper 7 bits of the latitude information bit string correspond to the area position information, and the remaining lower bits correspond to the relative position information.

For example, it is assumed that the position information indicates the coordinates of latitude 35 degrees 44 minutes 77.249 seconds north latitude and longitude 139 degrees 23 minutes 38.761 seconds east longitude. Of this position information, the upper bit string indicating 35 degrees north latitude and 139 degrees east longitude corresponds to the area position information, and the lower part indicating the coordinates of the latitude of 44 minutes 77.249 seconds and the longitude of 23 minutes 38.761 seconds. Bit string corresponds to relative position information. This area position information includes the latitude in the range from 35 ° 00:00 north latitude to just before 36 ° 00:00 north latitude and the range from 139 ° 00:00 east longitude to just before 140 ° 00: 00 second longitude. The area A1 specified by the longitude of is shown.

Further, the relative position information has a latitude of 44 minutes 77.249 seconds from the reference point 521 at the north latitude 35 degrees 00:00 and an east longitude 139 degrees 00:00 in the area A1, and the longitude from the reference point 521. Shows the latitude 522 at 23 minutes 38.761 seconds.

Further, it is assumed that a child or the like carrying the positioning terminal 110 resides in the area A1 and does not go out of the area. In this case, the area position information indicating the area A1 is registered in advance in the receiving side device (user terminal 120) as the registered position information, and the transmitting side device (positioning terminal 110) has only the relative position information among the position information. To send. If the positioning terminal 110 does not go out of the area A1, the receiving side can estimate the position information acquired by the transmitting side from the registered position information indicating the area A1 and the received relative position information.

By transmitting only the relative position information among the position information in this way, the positioning terminal 110 can reduce the amount of communication as compared with the case where the entire position information is transmitted. Further, since the positioning terminal 110 and the user terminal 120 are normally operated by a battery, it is possible to save power consumption and prolong the operation time by reducing the communication amount. Further, when the communication amount is small, the time required for reception can be shortened, so that the time from the start of reception to the display of the position of the positioning terminal 110 by the user terminal 120 can be shortened.

The communication system 100 divides the ground surface into a plurality of areas by a longitude line and a latitude line of one degree, but the unit of the divided latitude line and the longitude line is not limited to one degree. For example, it may be classified by the longitude line and the latitude line of the unit of 1 minute, or may be classified by the unit of 2 degrees or 30 minutes instead of 1 minute or 1 degree. The unit for dividing the area, in other words, the number of digits in the upper or lower bit string can be changed by executing the application of the positioning terminal 110 or the user terminal 120. When the number of digits of the high-order or low-order bit string is variable, if the number of digits of the high-order bit is made too large, the communication volume will increase. Therefore, depending on the application, the lowest digit of the upper bit string may be fixed and less than that may be variable.

Further, although the positioning terminal 110 transmits the entire relative position information, if the positioning accuracy is not so required, only a part of the relative position information may be transmitted. For example, 0.1 seconds of latitude and longitude is about 1.11 meters (m). This resolution is sufficient for general monitoring applications. Therefore, for example, the positioning terminal 110 may be configured to transmit up to the digit of 0.1 seconds in the relative position information and not to transmit the lowest digit of 0.01 seconds. In this case, a fixed value (for example, "0") is set in the lowest digit that is not transmitted in the user terminal 120. As a result, the payload of the packet transmitted by the positioning terminal 110 can be further reduced as compared with the case where all the relative position information is transmitted.

[User terminal configuration example]
FIG. 7 is a block diagram showing a configuration example of the user terminal 120 according to the first embodiment of the present technology. The user terminal 120 includes a control unit 121, a reception unit 122, a data processing unit 123, a display unit 124, and a storage unit 125.

The control unit 121 controls the entire user terminal 120. For example, when an operation for displaying the position of the positioning terminal 110 is performed, the control unit 121 controls the reception unit 122, the data processing unit 123, and the display unit 124 to start the operation.

The receiving unit 122 receives the relative position information wirelessly transmitted from the positioning terminal 110. The receiving unit 122 supplies the received relative position information to the data processing unit 123. When information other than the area position information (positioning time, etc.) is transmitted in addition to the relative position information, the receiving unit 122 also receives them and supplies them to the data processing unit 123.

The storage unit 125 stores the registered position information. For example, a non-volatile memory such as a flash memory is used as the storage unit 125. The registered position information is stored in the storage unit 125 in advance before receiving the relative position information. For example, when the user inputs a predetermined address, the data processing unit 123 converts the address into coordinates consisting of latitude and longitude, and stores information indicating the "degree" and direction of the latitude and longitude as registered position information. Have 125 memorize (in other words, register). Alternatively, instead of the user inputting the address, the latitude and longitude "degrees" and the direction may be directly input.

The data processing unit 123 estimates the position information on the transmitting side from the relative position information and the registered position information. When the receiving unit 122 receives the relative position information, the data processing unit 123 reads the registered position information from the storage unit 125 and estimates the position information by synthesizing the registered position information and the relative position information. Then, the data processing unit 123 supplies the position information to the display unit 124. The data processing unit 123 is an example of the guessing unit described in the claims.

The display unit 124 displays the position of the positioning terminal 110 indicated by the position information. For example, a liquid crystal display or an organic EL (ElectroLuminescence) display is used as the display unit 124. The display unit 124 displays, for example, a map and displays a predetermined mark indicating the position of the positioning terminal 110 on the map. The display unit 124 may display the coordinates of the latitude and longitude of the positioning terminal 110 in characters or numbers, or may convert the coordinates into an address and display the coordinates.

FIG. 8 is a diagram for explaining data processing in the first embodiment of the present technology. The positioning terminal 110 acquires the position information R1 indicating its own longitude and latitude. In the bit string indicating the longitude and latitude, the bit string corresponding to "degree" is located higher than the bit string corresponding to "minute" and "second". Therefore, the upper bit string corresponding to the "degree" (that is, the area position information excluding the direction) is hereinafter referred to as "MUB (Measured Upper Bits)". Further, lower bit strings (that is, relative position information) corresponding to "minutes" and "seconds" are referred to as "MLB (Measured Lower Bits)". The positioning terminal 110 extracts MLB (relative position information) from the position information and transmits it to the user terminal 120.

Bit strings indicating the "degrees" and directions of latitude and longitude are registered in advance in the storage unit 125 in the user terminal 120 as registration position information. Of the registered position information, the bit string indicating "degree" is hereinafter referred to as "RUB (Registered Upper Bits)". Here, the storage unit 125 stores registered position information indicating an area in which a user (child or elderly person) carrying the positioning terminal 110 on the transmitting side moves on a daily basis.

When the user terminal 120 receives the relative position information, the user terminal 120 reads the registered position information and combines it with the relative position information to generate the position information R1. As mentioned above, the registered area is as wide as 111 kilometers (km) square. Therefore, normally, the measured MUB coincides with the registered RUB, and the user terminal 120 on the receiving side can infer the same position information as the position information acquired by the positioning terminal 110 on the transmitting side. When used for watching over the communication system, it is assumed that the positioning terminal 110 crosses the boundary of the registration area.

[Communication system operation example]
FIG. 9 is a flowchart showing an example of transmission processing according to the first embodiment of the present technology. This transmission process is started by the positioning terminal 110, for example, when the power is turned on. The positioning terminal 110 determines whether or not the current time is the time to be positioned (step S911).

When it is the time to be positioned (step S9111: Yes), the positioning terminal 110 receives the radio wave from the GNSS satellite and acquires the positioning information (step S912). Then, the positioning terminal 110 extracts the relative position information from the position information in the positioning information (step S913) and transmits it to the user terminal 120 (step S914).

On the other hand, when it is not the time to be positioned (step S9111: No), or after step S914, the positioning terminal 110 repeatedly executes step S911 and subsequent steps.

FIG. 10 is a flowchart showing an example of reception processing according to the first embodiment of the present technology. This reception process is started by the user terminal 120, for example, when a predetermined application for displaying location information is executed. The user terminal 120 determines whether or not the relative position information has been received (step S981). When the relative position information is received (step S981: Yes), the user terminal 120 reads the registered position information from the storage unit 125 (step S982). Then, the user terminal 120 synthesizes the registered position information and the relative position information to acquire the position information (step S983), and displays the position information (step S984).

On the other hand, when the relative position information is not received (step S981: No), or after step S984, the user terminal 120 repeatedly executes step S981 and subsequent steps.

As described above, when the positioning terminal 110 transmits a part of the position information (relative position information), the communication amount can be reduced as compared with the case where the entire position information is transmitted. For example, it is assumed that latitude and longitude are measured in decimal notation, where "degree" is 3 digits, "minute" is 2 digits, second is "4 digits", and direction is 1 digit. When the upper 3 digits and the direction of these 10 digits are registered in advance on the receiving side as area position information and the lowest digit is fixed, the positioning terminal 110 may transmit only the remaining 5 digits. As a result, the payload of the packet to be transmitted can be halved as compared with the case where the entire position information is transmitted. However, since there are transmission data other than the payload such as training bits, the power required for transmission is not always halved.

As described above, according to the first embodiment of the present technology, the registered position information is registered in the storage unit 125 on the receiving side, and the transmitting side transmits only the relative position information among the position information. It is possible to reduce the amount of communication as compared with the case of transmitting the entire location information.

<2. Second Embodiment>
In the first embodiment described above, it is assumed that the positioning terminal 110 on the receiving side does not go out of the registration area of about 111 km (km) square, assuming movement such as walking. However, when the whereabouts of a child or an elderly person carrying the positioning terminal 110 is near the boundary of the registration area, it is conceivable that the positioning terminal 110 leaves the registration area and moves to an adjacent area. Even in this case, the user terminal 120 can acquire the position of the adjacent area by adding or subtracting "1" to the value of the registered position information. The communication system 100 of the second embodiment is different from the first embodiment in that the position of the area adjacent to the registration area is acquired by adding or subtracting "1".

The user terminal 120 of the second embodiment determines whether or not the positioning terminal 110 has crossed the boundary of the registration area based on the received relative position information, and is adjacent to the registration area by addition or subtraction of "1". Get the position of the area.

Since the positioning terminal 110 may be located outside the registered area, the user terminal 120 may identify and display the registered area on the map so that it can be distinguished from other areas.

FIG. 11 is a diagram for explaining the registered position information and the guard band in the second embodiment of the present technology. In the RUB excluding the direction from the registered position information, the least significant bit (ULSB) (Upper Least Significant Bit) indicates a range of 1 degree in the latitude direction or the longitude direction. For example, when the RUB indicates 35 degrees, when "1" is added to the RUB, the value after the addition indicates 36 degrees. Further, for example, when the RUB shows 35 degrees, when "1" is subtracted from the RUB, the value after the subtraction shows 34 degrees.

Here, a buffer area is provided inside and outside the registration area. The bit string corresponding to this buffer region is hereinafter referred to as GB (Guard Band). This GB is used for the user terminal 120 to determine whether or not the positioning terminal 110 has approached the boundary of the registration area.

FIG. 12 is a diagram for explaining the calculation of longitude in the second embodiment of the present technology. In the figure, a is a diagram for explaining a case where an operation is executed for longitude. It is assumed that the area from 139 degrees 00 minutes east longitude to immediately before 140 degrees 00 minutes 00 seconds east longitude is A1, and the position information of this area is registered.

Here, it is assumed that the positioning terminal 110 has moved from the coordinates 522 in the area A1 to the coordinates 523 in the area A4 adjacent to the area A1. Further, it is assumed that the positioning terminal 110 measures the position information and transmits the relative position information every time a certain positioning cycle elapses. In this case, the user terminal 120 determines whether or not the positioning terminal 110 has crossed the boundary based on the degree of change in the relative position information. For example, when the positioning terminal 110 moves from the coordinate 522 having a longitude of 59 minutes in the area A1 to the coordinate 523 having a longitude of 1 minute in the adjacent area A4, the positioning terminal 110 is constant after transmitting 59 minutes. One minute is transmitted after the lapse of the positioning cycle of. When the positioning cycle is short (for example, 60 seconds), the distance between 59 minutes and 1 minute in the same area is about 107 kilometers (km), so 59 minutes to 1 minute in the area A1. It is impossible for the positioning terminal 110 to move within the positioning cycle by ordinary transportation means. When the change in the relative position information is large in this way, it can be determined that the user terminal 120 has moved beyond the boundary of the area A1 into the adjacent area A4. Since the longitude of the area A4 is 140 degrees east longitude, the user terminal 120 adds "1" to the longitude (RUB) of the registered position information to make it from 139 degrees to 140 degrees. By executing this calculation, the user terminal 120 on the receiving side can infer the position information of the coordinates 523 of the area A4.

FIG. 12b is a diagram for explaining a case where the calculation using the RUB is not executed. It is assumed that the area A1 is registered in the same manner as a in the figure, and the positioning terminal 110 moves from the coordinates 522 in the area A1 to the coordinates in the area A4 next to the area A1. If "1" is not added to the RUB, the position information of the coordinates 524 in the region A1 at 139 degrees east longitude will be erroneously combined even though the region A4 is actually moved. On the other hand, since the user terminal 120 of the second embodiment adds "1" to the RUB, accurate position information can be synthesized as illustrated in a in the figure.

FIG. 13 is a diagram for explaining a process for crossing the 0 degree meridian and the equator in the second embodiment of the present technology. In the figure, a is a diagram for explaining the processing when crossing the meridian of 0 degrees. It is assumed that the area from 1 degree 00 minutes 00 seconds east longitude to immediately before the 0 degree meridian is A1, and the position information of this area is registered.

Here, it is assumed that the positioning terminal 110 has moved from the coordinate 531 in the area A1 to the coordinate 532 in the adjacent area A4 beyond the meridian of 0 degrees. The longitude of this region A4 is from 1 degree 00 minutes 00 seconds west longitude to the meridian, and the longitude value is the same as that of the region A1 but only the direction is different. Therefore, the user terminal 120 inverts only the direction of longitude. The same is true for the 180 degree meridian.

FIG. 13b is a diagram for explaining the processing when crossing the equator. It is assumed that the area from latitude 1 ° 0'00 to just before the equator is A1, and the position information of this area is registered.

Here, it is assumed that the positioning terminal 110 has moved from the coordinate 531 in the area A1 to the coordinate 533 in the adjacent area A0 across the equator. The latitude of this region A0 is from latitude 1 ° 0'00 to the equator, and the latitude value is the same as that of region A1 but only the direction is different. Therefore, the user terminal 120 inverts only the direction of latitude.

FIG. 14 is a flowchart showing an example of reception processing in the second embodiment of the present technology. The reception process of the second embodiment is different from the first embodiment in that the registration position information calculation process (step S930) for performing the calculation depending on whether or not the boundary is crossed is further executed.

FIG. 15 is a flowchart showing an example of registration position information calculation processing in the second embodiment of the present technology. The user terminal 120 executes a latitude calculation process for calculating the latitude (step S940), executes a longitude calculation process for calculating the longitude (step S960), and ends the registration position information calculation process.

FIG. 16 is a flowchart showing an example of latitude calculation processing in the second embodiment of the present technology. In the figure, RLB _LA , GB _LA , MLB _LA , ULSB _LA , AUB _LA and RUB _LA are shown to be latitude RLB, GB, MLB, ULSB, AUB and RUB. First, the user terminal 120 _{determines whether or not the RLB LA of the} registration position information is smaller than the guard band GB _LA (that is, the registration area is closer to the low latitude side) (step S941). When the RLB _LA is _{smaller than the GB LA} (step S941: Yes), the user terminal 120 determines that the positioning terminal 110 is the boundary on the low latitude side depending on whether _{the measured MLB LA} is larger than (ULSB _LA- GB _LA). It is determined whether or not the above is exceeded (step S942).

If the MLB _LA is greater than (ULSB _LA- GB _LA ) (ie, crosses the boundary on the low latitude side) (step S942: Yes), the user terminal 120 subtracts "1" from _{the RUB LA and the latitude.} AUB _LA is set (step S943). Then, the user terminal 120 determines whether or not the positioning terminal 110 has crossed the equator depending on whether or not the _{AUB LA is -1 (step S944).}

If the AUB _LA is -1 (ie, crosses the equator) (step S944: Yes), the user terminal 120 _{modifies the AUB LA} by incrementing (step S945). Further, the user terminal 120 reverses the direction of the latitude of the registered position information (step S946).

If the AUB _LA is not -1 (ie, does not cross the equator) (step S944: No), or after step S946, the user terminal 120 ends the latitude calculation process.

Further, when the RLB _LA is GB _LA or more (step S941: No), the user terminal 120 _{determines whether the RLB LA} is (ULSB _LA- GB _LA ) or more (that is, the registration area is close to the high latitude side). Is determined (step S947).

When the RLB _LA is (ULSB _LA- GB _LA ) or more (step S947: Yes), the user terminal 120 determines whether the positioning terminal 110 has crossed the boundary on the high latitude side depending on whether the _{MLB LA} is _{smaller than the GB LA.} It is determined whether or not (step S948).

MLB _LA is _{GB LA} less when (i.e., high latitude side beyond boundaries) (step S948: Yes), the user terminal 120 is set to _{AUB LA} "1" is added to the _{RUB LA} (step S949 ).

When the RLB _LA is smaller than (ULSB _LA- GB _LA ) (step S947: No), or when the MLB _LA is GB _LA or more (step S948: No), the user terminal 120 _{keeps the RUB LA} as it is without addition or subtraction. , AUB _LA (step S950). Even when the MLB _LA is (ULSB _LA- GB _LA ) or less (step S942: No), step S950 is executed. After step S949 or S950, the user terminal 120 ends the latitude calculation process.

FIG. 17 is a flowchart showing an example of longitude calculation processing in the second embodiment of the present technology. In the figure, RLB _LO , GB _LO , MLB _LO , ULSB _LO , AUB _LO and RUB _LO are shown to be RLB, GB, MLB, ULSB, AUB and RUB of longitude. First, the user terminal 120 _{determines whether or not the RLB LO of the} registration position information is smaller than the guard band GB _LO (that is, the registration area is close to the 0 degree side) (step S961). When the RLB _LO is _{smaller than the GB LO} (step S961: Yes), the user terminal 120 determines that the positioning terminal 110 is on the 0 degree side boundary depending on whether _{the measured MLB LO} is larger than (ULSB _LO- GB _LO). It is determined whether or not the above is exceeded (step S962).

When the MLB _LO is larger than (ULSB _LO- GB _LO ) (that is, beyond the boundary on the 0 degree side) (step S962: Yes), the user terminal 120 subtracts "1" from _{the RUB LO to obtain the AUB LO} . Set (step S963). Then, the user terminal 120 determines whether or not the positioning terminal 110 has crossed the meridian of 0 degrees depending on whether or not the _{AUB LO is -1 (step S964).}

If the AUB _LO is -1 (ie, crosses the 0 degree meridian) (step S964: Yes), the user terminal 120 _{modifies the AUB LO} by incrementing (step S965). Further, the user terminal 120 reverses the direction of the longitude of the registered position information (step S966).

If the AUB _LO is not -1 (ie, does not cross the 0 degree meridian) (step S964: No), or after step S966, the user terminal 120 ends the longitude calculation process.

When the RLB _LO is GB _LO or more (step S961: No), the user terminal 120 _{determines whether or not the RLB LO} is (ULSB _LO- GB _LO ) or more (that is, the registration area is close to the 180 degree side). Determine (step S967).

Further, when the RLB _LO is (ULSB _LO- GB _LO ) or more (step S967: Yes), the user terminal 120 has a boundary on the 180 degree side of the positioning terminal 110 depending on whether the _{MLB LO} is _{smaller than the GB LO.} It is determined whether or not the above is exceeded (step S968).

MLB _LO is _{GB LO} less when (i.e., 180 degrees side beyond boundaries) (step S968: Yes), the user terminal 120 is set to _{AUB LO} adds "1" to the _{RUB LO} (step S969). Then, the user terminal 120 determines whether or not the positioning terminal 110 has crossed the meridian of 180 degrees depending on whether or not the _{AUB LO is 180 (step S970).}

If the AUB _LO is 180 (ie, crosses the 180 degree meridian) (step S970: Yes), the user terminal 120 _{modifies the AUB LO} by decrementing (step S971). Further, the user terminal 120 reverses the direction of the longitude of the registered position information (step S972).

If the AUB _LO is not 180 (ie, does not cross the 180 degree meridian) (step S970: No), or after step S972, the user terminal 120 ends the longitude calculation process.

If the RLB _LO is smaller than (ULSB _LO- GB _LO ) (step S967: No), or if the MLB _LO is greater than or equal to GB _{LO (step S968: No), the user terminal 120 keeps the RUB LO} as it is without addition or subtraction. , AUB _LO (step S973). Even when the MLB _LO is (ULSB _LO- GB _LO ) or less (step S962: No), step S973 is executed. After step S973, the user terminal 120 ends the longitude calculation process.

The user terminal 120 determines whether or not it has crossed the equator and whether or not it has crossed the meridian of 0 degree or 180 degrees, but only one of these may be executed. It may be configured not to execute both. For example, if it is assumed that the meridian of 0 degree or 180 degree passes but the equator does not pass (such as the United Kingdom) or region, it is not necessary to judge whether or not the equator has been crossed. In countries and regions (such as South America) where the equator passes but the 0 or 180 degree meridians do not pass, it is not necessary to determine whether or not those meridians have been crossed. In countries and regions where the equator and the 0-degree or 180-degree meridian do not pass (such as Japan), both judgments are unnecessary.

Further, although it is determined whether or not the user terminal 120 on the receiving side has crossed the boundary, the positioning terminal 110 on the transmitting side may make the determination. However, since the processing load on the transmitting side increases, it is desirable that the receiving side determines whether or not the boundary has been crossed.

FIG. 18 is a diagram showing an example of a data structure of arithmetic information transmitted when determining whether or not the positioning terminal 110 in the second embodiment of the present technology has crossed a boundary. This calculation information includes, for example, latitude calculation information, latitude direction reversal flag, longitude calculation information, and longitude direction reversal flag. The positioning terminal 110 on the transmitting side stores the registered position information in advance, and generates and transmits this calculation information by comparing the positioned position information with the registered position information. Then, the user terminal 120 on the receiving side performs addition / subtraction of "1" and inversion of the direction based on the calculation information.

The latitude calculation information indicates the calculation content related to latitude. For example, "+1" is set in the latitude calculation information when instructing the operation of adding "1" to the latitude (RUB) of the registered position information, and "-" is set in the latitude calculation information when instructing the subtraction of "1". 1 "is set. Further, "0" is set in the latitude calculation information when only the direction is inverted while the longitude value remains the same.

The latitude and direction inversion flag is information indicating whether or not to invert the latitude and direction. As described above, when the positioning terminal 110 moves across the equator, the direction of latitude is reversed.

The longitude calculation information indicates the calculation content related to longitude. For example, "+1" is set in the longitude calculation information when instructing an operation to add "1" to the longitude (RUB) of the registered position information, and "-" is set in the longitude calculation information when instructing subtraction of "1". 1 "is set. Further, "0" is set in the longitude calculation information when only the direction is inverted while the longitude value remains the same.

The longitude direction inversion flag is information indicating whether or not to invert the longitude direction. As described above, when the positioning terminal 110 moves across the meridian of 0 degree or 180 degrees, the direction of longitude is reversed.

As described above, according to the second embodiment of the present technology, since the user terminal 120 adds or subtracts the value of the registered position information, the positioning terminal 110 moves to the area adjacent to the registered area. Even if there is, the user terminal 120 can infer the position after the movement.

[First modification]
In the first and second embodiments described above, the positioning terminal 110 has extracted the lower bits of the positioning information as relative position information, but acquires the difference between the positioning information and the registered position information as relative position information. You may. The communication system of the first modification is different from the first and second embodiments in that the positioning terminal 110 calculates the difference between the positioning information and the registered position information. However, in this configuration, the amount of communication can be reduced, but the processing load on the transmitting side increases.

FIG. 19 is a block diagram showing a configuration example of the positioning terminal 110 in the first modification of the present technology. The positioning terminal 110 of the first modification is different from the first embodiment in that it further includes a storage unit 115. The same information as the registered position information registered in the user terminal 120 is registered in advance in the storage unit 115.

FIG. 20 is a diagram for explaining the differential operation in the first modification of the present technology. In the first modification, the position information indicating a predetermined reference point is registered in advance as the registration position information. The positioning terminal 110 calculates the difference between the registered position information and the positioning information. This difference indicates the relative position from the registered reference point. For example, when the point REG1 at "35 degrees 01 minutes 01 seconds" is registered and the point M1 at "35 degrees 02 minutes 02 seconds" is positioned, "+1 minute 1 second" is calculated as the difference DIF1 between them. The minutes and seconds of the registered position may be 00 minutes 00 seconds. Further, when the point M2 at "35 degrees 00 minutes 01 seconds" is positioned, "-1 minute" is calculated as the difference DIF2 between them. The positioning terminal 110 transmits the difference information as relative position information. In this way, the difference information (relative position information) is represented by a sign and an absolute value. Further, the effective digit of this difference information is set in consideration of the moving speed of the object to be watched. No information needs to be added other than the sign and absolute value, even when crossing the 0 or 180 degree meridian or equator. On the other hand, the user terminal 120 adds the received relative position information (difference) to the registered position information to acquire the position information indicating the absolute position of the positioning terminal 110.

FIG. 21 is a diagram for explaining data processing in the first modification of the present technology. The storage unit 115 of the positioning terminal 110 stores in advance the registered position information REG1 indicating a predetermined reference point. The positioning terminal 110 acquires the position information M1 indicating its own longitude and latitude. Then, the positioning terminal 110 calculates and transmits the difference between the position information M1 and the registered position information REG1 as the relative position information DIF1. The relative position information DIF1 includes a sign of the difference and an absolute value of the difference.

When the user terminal 120 receives the relative position information DIF1, the registered position information REG1 is read out and added to the relative position information DIF1 to generate the position information M1.

FIG. 22 is a flowchart showing an example of transmission processing in the first modification of the present technology. The transmission process of this first modification is different from the second embodiment in that steps S915 and S916 are executed instead of step S913.

When the positioning terminal 110 acquires the positioning information (step S912), it reads out the registered position information (step S915) and calculates the difference between them as the relative position information (step 916). Then, the positioning terminal 110 transmits the calculated relative position information to the user terminal 120 (step S914).

FIG. 23 is a flowchart showing an example of reception processing in the first modification of the present technology. The reception process of this first modification is different from the first embodiment in that S988 is executed instead of step S983.

The user terminal 120 reads out the registered position information (step S982), adds the relative position information (difference) to the registered position information, and acquires the position information (step S988). Then, the user terminal 120 displays the position information (step S984).

As described above, according to the first modification of the present technology, the positioning terminal 110 transmits the difference between the positioned position information and the registered position information as relative position information, so that the position information is used as it is without obtaining the difference. The amount of communication can be reduced as compared with the case of transmission.

[Second modification]
In the first and second embodiments described above, the communication system 100 expresses latitude and longitude in degrees, minutes, and seconds, but may be expressed in a notation other than degrees, minutes, and seconds, such as milliseconds. .. This second variant differs from the first and second embodiments in that latitude and longitude are represented in milliseconds.

FIG. 24 is a diagram showing a movement path across the 180-degree meridian and the equator in the second modification of the second embodiment of the present technology. In the figure, a indicates a movement path across the meridian of 180 degrees, and b in the figure shows a movement path across the equator. In milliseconds format, longitude and latitude are expressed in milliseconds only. The orientation is represented by a "+" or "-" sign. For example, assuming that the latitude "degree" is d, "minute" is m, and "second" is s, the value in the degree, minute, and second format can be converted into the value MS in the millisecond format by the following equation. Here, d and m are integers, and MS and s are real numbers.
MS = (d × 3600 + m × 60 + s) × 1000

According to the above equation, the range of longitude from 0 degrees to 180 degrees is converted from "0.000" milliseconds to "648,000,000.000" milliseconds, where the number after the decimal point is three digits. This longitude range is divided, for example, in "1,000.000" milliseconds. In decimal notation, the upper 3 digits indicate the position of the area, and the remaining lower digits indicate the relative position. Therefore, the boundary of the region immediately preceding the 180 degree meridian is "± 647,000.000" milliseconds. Here, the symbols "+" and "-" indicate the direction of longitude.

Similarly, the latitude is also classified in "1,000" milliseconds. Therefore, as illustrated in b in FIG. 24, the boundary of the region immediately before the equator is "± 1,000.000" milliseconds. Here, the symbols "+" and "-" indicate the direction of latitude. The positioning terminal 110 transmits only the lower digits (relative position information) of these latitudes and longitudes.

As described above, according to the second modification of the present technology, since the positioning terminal 110 transmits the lower digits of the latitude and longitude expressed in milliseconds, it is more than the case where both the upper digit and the lower digit are transmitted. The amount of communication can be reduced.

It should be noted that the above-described embodiment shows an example for embodying the present technology, and the matters in the embodiment and the matters specifying the invention within the scope of claims have a corresponding relationship with each other. Similarly, the matters specifying the invention within the scope of claims and the matters in the embodiment of the present technology having the same name have a corresponding relationship with each other. However, the present technology is not limited to the embodiment, and can be embodied by applying various modifications to the embodiment without departing from the gist thereof.

Further, the processing procedure described in the above-described embodiment may be regarded as a method having these series of procedures, or as a program for causing a computer to execute these series of procedures or as a recording medium for storing the program. You may catch it. As this recording medium, for example, a CD (Compact Disc), MD (MiniDisc), DVD (Digital Versatile Disc), memory card, Blu-ray Disc (Blu-ray (registered trademark) Disc) and the like can be used.

It should be noted that the effects described in the present specification are merely examples and are not limited, and other effects may be obtained.

The present technology can have the following configurations.
(1) A transmission device that acquires and transmits relative position information indicating a relative position from a predetermined reference point, and
A communication system including a receiving device that stores predetermined registered position information in advance and estimates the position information from the relative position information and the registered position information when the relative position information is received.
(2) The transmitting device acquires the relative position information from the position information including the area position information indicating the position of the measured area and the relative position information.
The communication system according to (1) above, wherein the registered position information is position information indicating the position of a specific area.
(3) One of the transmitting device and the receiving device executes a predetermined operation for calculating the position information of the transmitting device when the transmitting device crosses the boundary of the specific area (2). ) Described communication system.
(4) A predetermined buffer area is set in the vicinity of the boundary, and a predetermined buffer area is set.
The communication system according to (3), wherein one of the transmitting device and the receiving device determines whether or not the transmitting device has crossed the boundary based on the predetermined buffer region and the relative position information.
(5) The registered position information includes the longitude of the specific area, and includes the longitude of the specific area.
The communication system according to (3) above, wherein the transmitting device reverses the direction of the longitude when the transmitting device crosses the 0 degree meridian and when the transmitting device crosses the 180 degree meridian.
(6) The registered position information includes the latitude of the specific area.
The communication system according to any one of (3) to (5) above, wherein one of the transmitting device and the receiving device reverses the direction of the latitude when the transmitting device crosses the equator.
(7) The registered position information is information indicating the position of the predetermined reference point.
The communication system according to (1), wherein the transmission device stores the registered position information in advance, acquires the position information, and transmits the difference between the position information and the registered position information as the relative position information. ..
(8) The communication system according to any one of (1) to (7) above, wherein the receiving device displays the position of the transmitting device indicated by the position information on a display unit.
(9) The communication system according to any one of (1) to (8) above, wherein the relative position information indicates the measured values of the minutes and the seconds among the degrees, minutes and seconds of latitude and longitude.
(10) The communication system according to any one of (1) to (8) above, wherein the relative position information indicates a lower digit among the upper digit and the lower digit of the measured value in milliseconds of latitude and longitude.
(11) A position information acquisition unit that acquires relative position information indicating a relative position from a predetermined reference point, and
A transmission device including a transmission unit that transmits the relative position information.
(12) A storage unit that stores predetermined registered position information,
A receiver that receives relative position information indicating a relative position from a predetermined reference point, and a receiver.
A receiving device including a guessing unit that estimates position information from the relative position information and the registered position information.
(13) A position information acquisition procedure for acquiring relative position information indicating a relative position from a predetermined reference point, and
A method of controlling a transmission device including a transmission procedure for transmitting relative position information.
(14) A reception procedure for receiving relative position information indicating a relative position from a predetermined reference point, and
A control method of a receiving device including a guessing procedure for estimating position information from the registered position information read from a storage unit that stores predetermined registered position information and the relative position information.
(15) A position information acquisition procedure for acquiring relative position information indicating a relative position from a predetermined reference point, and
A program for causing a computer to execute a transmission procedure for transmitting relative position information.
(16) A reception procedure for receiving relative position information indicating a relative position from a predetermined reference point, and
A program for causing a computer to execute a guessing procedure for estimating position information from the registered position information read from a storage unit that stores predetermined registered position information and the relative position information.

100 Communication system 110 Positioning terminal 111, 121 Control unit 112 GNSS receiving unit 113, 123 Data processing unit 114 Transmitting unit 115, 125 Storage unit 120 User terminal 122 Receiver unit 124 Display unit

Claims (16)

A transmission device that acquires and transmits relative position information indicating a relative position from a predetermined reference point, and
It is equipped with a receiving device that stores predetermined registered position information in advance and estimates the position information from the relative position information and the registered position information when the relative position information is received.
The transmitting device acquires the relative position information from the position information including the area position information indicating the position of the measured area and the relative position information.
The registered position information is position information indicating the position of a specific area, and is
One of the transmitting device and the receiving device executes a predetermined operation for calculating the position information of the transmitting device when the transmitting device crosses the boundary of the specific area.
A predetermined buffer area is set in the vicinity of the boundary, and a predetermined buffer area is set.
A communication system in which one of the transmitting device and the receiving device determines whether or not the transmitting device has crossed the boundary based on the predetermined buffer region and the relative position information . A transmission device that acquires and transmits relative position information indicating a relative position from a predetermined reference point, and
With a receiving device that stores predetermined registered position information obtained from data input by the user in advance and estimates the position information from the relative position information and the registered position information when the relative position information is received.
A communication system comprising. The transmitting device acquires the relative position information from the position information including the area position information indicating the position of the measured area and the relative position information.
The communication system according to claim 1, wherein the registered position information is position information indicating the position of a specific area. The communication according to claim 2, wherein one of the transmitting device and the receiving device executes a predetermined operation for calculating the position information of the transmitting device when the transmitting device crosses the boundary of the specific area. system. The registered position information includes the longitude of the specific area, and includes the longitude of the specific area.
The communication system according to claim 4, wherein one of the transmitting device and the receiving device reverses the direction of the longitude when the transmitting device crosses the 0 degree meridian and when the transmitting device crosses the 180 degree meridian. The registered position information includes the latitude of the specific area, and includes the latitude of the specific area.
The communication system according to claim 4, wherein one of the transmitting device and the receiving device reverses the direction of the latitude when the transmitting device crosses the equator. The registered position information is information indicating the position of the predetermined reference point, and is the information indicating the position of the predetermined reference point.
The communication system according to claim 1, wherein the transmission device stores the registered position information in advance, acquires the position information, and transmits the difference between the position information and the registered position information as the relative position information. The communication system according to claim 1, wherein the receiving device displays the position of the transmitting device indicated by the position information on a display unit. The communication system according to claim 1, wherein the relative position information indicates measured values of the minutes and the seconds among the degrees, minutes and seconds of latitude and longitude. The communication system according to claim 1, wherein the relative position information indicates a lower digit among the upper digit and the lower digit of the measured value in milliseconds of latitude and longitude. A position information acquisition unit that acquires relative position information indicating a relative position from a predetermined reference point, and a position information acquisition unit.
A transmission device including a transmission unit that transmits the relative position information .
The position information acquisition unit acquires the relative position information from the position information including the area position information indicating the position of the measured area and the relative position information.
The registered position information is position information indicating the position of a specific area, and is
When the transmission device exceeds the boundary of the specific area, the transmission information acquisition unit executes a predetermined operation for calculating the position information of the transmission device.
A predetermined buffer area is set in the vicinity of the boundary, and a predetermined buffer area is set.
The transmission information acquisition unit determines whether or not the transmission device has crossed the boundary based on the predetermined buffer region and the relative position information.
Transmitter. A storage unit that stores predetermined registered location information,
A receiver that receives relative position information indicating a relative position from a predetermined reference point, and a receiver.
A receiving device including a guessing unit that acquires the registered location information from data input by a user, stores it in the storage unit, and estimates the position information from the relative position information and the registered position information. A position information acquisition procedure for acquiring relative position information indicating a relative position from a predetermined reference point, and
A method for controlling a transmission device including a transmission procedure for transmitting relative position information.
In the position information acquisition procedure, the relative position information is acquired from the position information including the area position information indicating the position of the measured area and the relative position information.
The registered position information is position information indicating the position of a specific area, and is
In the transmission information acquisition procedure, when the transmission device exceeds the boundary of the specific area, a predetermined operation for calculating the position information of the transmission device is executed.
A predetermined buffer area is set in the vicinity of the boundary, and a predetermined buffer area is set.
In the transmission information acquisition procedure, it is determined whether or not the transmission device has crossed the boundary based on the predetermined buffer region and the relative position information.
Transmission device control method. A reception procedure for receiving relative position information indicating a relative position from a predetermined reference point, and
Predetermined registered position information is acquired from the data input by the user and stored in the storage unit, and the position information is estimated from the registered position information read from the storage unit and the relative position information. A method of controlling a receiver that comprises a guessing procedure. A position information acquisition procedure for acquiring relative position information indicating a relative position from a predetermined reference point, and
It is a program for causing a computer in a transmitting device to execute the transmission procedure for transmitting the relative position information .
In the position information acquisition procedure, the relative position information is acquired from the position information including the area position information indicating the position of the measured area and the relative position information.
The registered position information is position information indicating the position of a specific area, and is
In the transmission information acquisition procedure, when the transmission device exceeds the boundary of the specific area, a predetermined operation for calculating the position information of the transmission device is executed.
A predetermined buffer area is set in the vicinity of the boundary, and a predetermined buffer area is set.
A program for determining whether or not the transmission device has crossed the boundary based on the predetermined buffer region and the relative position information in the transmission information acquisition procedure. A reception procedure for receiving relative position information indicating a relative position from a predetermined reference point, and
Predetermined registered position information is acquired from the data input by the user and stored in the storage unit, and the position information is estimated from the registered position information read from the storage unit and the relative position information. A program to make a computer perform a guessing procedure.

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