JPH0760174B2 - Guide system on campus by millimeter-wave radio - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide system for performing navigation on the premises of structures such as airports and train stations by millimeter-wave radio.

[0002]

2. Description of the Related Art When using a premises of a structure such as an unknown station or airport for traveling or on a business trip, use a prepared floor plan of the premises in order to reach a target platform or boarding gate. Or, generally, the direction is determined based on the guide display provided on the wall or pillar of the premises.

[0003]

However, at major stations and international airports in complicated metropolitan areas, which have complicated structures, appropriate guidance displays are not always displayed at short intervals.
Finding the guidance display can also be difficult.
In addition, the direction of the road can be changed by recognizing the difference between the simulated environment described in the guide map prepared in advance and the actual environment, or by erroneously recognizing the correspondence between the simulated environment and the actual environment in the guide map display. There is also the illusion of driving directions. In such a case, the arrival to the destination is delayed, which results in a failure to transfer in a short time and miss the intended train or flight, which is a great disadvantage to the users on the premises. Becomes

Therefore, it has been desired to develop a guide system on the premises that can accurately and quickly grasp the route to a destination without relying on a guide display plate or the like installed on the premises of a structure such as a station.

[0005]

The present invention has been made in view of the above, and is installed in advance at a plurality of locations on the premises of a structure,
A guide system comprising a base station (2) having a millimeter wave transmission / reception function with strong directivity, and a transmission / reception terminal (for example, a display device 3) capable of transmitting / receiving the millimeter wave with the base station (2), Guide map display means (18) for displaying a guide map in a substantially horizontal direction based on guide map data of a location where the transmitting / receiving terminal (3) is located and surroundings, and a reference direction (A) predetermined for the transmitting / receiving terminal (3). ) And a transmitted wave from the base station (2) being received, a relative angle detection means (16) for detecting an angle on a substantially horizontal plane, and guide map data of a point where the transmission / reception terminal (3) is located and peripheral areas. The relative angle detecting means (1
Guide map data correction means (17) that corrects based on the detection information of 6) and relatively equalizes the actual environment at and around the point where the transmitting / receiving terminal (3) is located and the simulated environment of the guide map displayed on the transmitting / receiving terminal. Are provided in the transmitting / receiving terminal (3).

[0006]

Since the base station and the transmission / reception terminal perform transmission / reception using the millimeter wave having a high transmission rate, the processing speed of transmission / reception performed between the base station and the transmission / reception terminal is improved. Since the base station and the transmission / reception terminal perform transmission / reception with the millimeter wave having a strong directivity, the transmission / reception terminal can receive the transmission wave of the base station from only a fixed direction. The transmitting / receiving terminal receiving the transmission wave of the base station as described above detects the angle formed by the reference direction and the direction of the reception wave by the relative angle detecting means, and the guide map data correcting means calculates the guide map data based on the detected angle. The guide map display means displays the guide map based on the guide map data that has been corrected and corrected by the guide map data correcting means.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a guide system according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a first embodiment of a millimeter-wave guide system for a premises, which transmits / receives data to / from a control station 1 installed in a control room or the like for centrally controlling a structure such as a station or an airport. A plurality of possible base stations 2 ... Are connected via, for example, a transmission cable, and are preliminarily arranged at predetermined intervals in the premises of the structure at predetermined intervals (for example, at intervals of 5 to 10 meters to side walls or ceiling walls of the premises). The installed base stations 2, ... Are capable of transmitting and receiving by millimeter wave radio with a display device 3, which is a transmitting and receiving terminal carried by a traveler or the like.

For example, the control station 1 has a transmission / reception function for enabling two-way communication with the base stations 2, ..., Analyzing commands issued from the display devices 3 ... A transmission / reception management control function for performing the above, and guide map data and the like regarding a sketch of the premises of the structure are fixedly provided. Further, the base station 2 has a transmission / reception function for enabling bidirectional communication with the control station 1 and the display device 3, and also has position information where the base station 2 is installed, Based on the position information, the control station 1 can perform transmission / reception with a specific base station 2 without being confused with other base stations 2, ... It is possible to specify it.

Further, each display device 3 has a transmission / reception function for enabling transmission / reception to / from the base station 2 by millimeter waves, and the base station 2 closest to the point where the display device 3 is located. Based on the radio wave detection function for detecting the position, and the guide map data of the area where the display device 3 is located (in this embodiment, the guide map is supplied from the control station 1 through the base station 2). A guide map display function for displaying in a horizontal direction (detailed later), a relative for detecting an angle on a substantially horizontal plane formed by a predetermined reference direction with respect to the display device 3 and a transmission wave from the base station 2 during reception. Angle detection function (detailed later), guide map data of the area where the display device 3 is located are corrected based on the detection information of the relative angle detection function, and transmitted / received. End is as a pseudo environment of guide map displayed on the real environment and transmitting and receiving terminals of the area located providing relatively equally guide map data correction function.

As in the first embodiment, the control map is stored in the control station 1 and held therein, and the guide map data is supplied in accordance with the request from the base stations 2 ... Not something. For example, in the second embodiment shown in FIG. 2, at least the transmission / reception function, the position information, the guide map data, and the transmission / reception management control function are provided in the base stations 2 ', respectively, and each base station 2'and the display device 3 ... It is supposed that bi-directional communication is performed only with. In this way, commands and data can be sent and received without going through the control station 1, so that the processing speed and the like can be further improved.

A display device 3 serving as a transmission / reception terminal
The guide map data may be stored in the. For example, the required guide map data for the premises may be stored in the display device 3 from a personal computer or the like via a data input / writer, or the guide map data for the premises of a specific structure may be written in advance in a card ROM (IC). Cards, magnetic memory cards, etc.) and CD-
A guide map data storage medium such as a ROM may be prepared, and the guide map data storage medium may be replaced to supply the guide map data according to each premises to the display device 3.

Next, an embodiment of the display device 3 will be described with reference to FIG. This display device 3
Is a portable box-shaped box body, has a display unit 4 formed of a liquid crystal display or the like on any surface of the main body, and holds the display unit 4 in a substantially horizontal direction. At this time, the antenna unit 5 capable of receiving the millimeter waves emitted from the base stations 2 ... 360 degrees in the horizontal direction and the operation button 6 (contact type,
A touch sensor type or the like) is provided in an appropriate place of the main body of the display device 3. Further, the display device 3 is provided with a transmission / reception management control function relating to communication with the base stations 2, ..., A battery (whether exchangeable or rechargeable), or the like.

In order to enhance the convenience of carrying the display device 3, a hand strap can be attached to the main body of the display device 3 or a storage case dedicated to the display device 3 formed in a waist pouch or a shoulder bag can be provided. Is also good. When the display unit 4 is composed of a liquid crystal display, the visibility of the display unit 4 can be improved by adding a backlight function. Furthermore, by equipping the main body of the display device 3 with additional functions such as an alarm clock, an AM radio, and a television image receiving function,
Various added values other than the transmitting / receiving terminal can be given to the display device 3. Further, the shape of the main body of the display device 3, the arrangement of the display unit 4, the antenna unit 5, the operation buttons 6 and the like are not limited to those in the embodiment of FIG.
If one surface of the display device 3 main body is used as a front display portion and operation buttons are provided on the other surface, the display portion can be made large (or the display device 3 main body can be made small).

As described above, when the display device 3 main body is provided with various additional functions, an operation switch may be appropriately provided so as to enable control according to each function. In the display device 3 shown in,
The operation button 6 is composed of 6 types of operation switches for performing basic operations. The control contents of each operation button will be outlined below. Is a power switch for turning on / off the power of the display device 3. Is a switch for starting radio wave exploration by the antenna unit 5 and displaying a guide map of the area. Is a switch for enlarging the area. Is a switch that is close to the area and displays relevant target facilities (eg ticket office, green window, toilet, ticket gate, etc.). Is a selection switch for performing a composite display by any one of the above combinations.

Although not shown in the operation buttons 6 described above, a simple keyboard portion or the like is provided, and a destination (for example, platform number) or a train number to be used is input from the keyboard portion and the input information is input. Base station 2 ...
The necessary information may be displayed on the display unit 4 by transmitting the information to the display unit 4.

Next, a specific example of the antenna section 5 will be described with reference to FIG. The antenna 7 used for both transmission and reception is housed in a radome 8 through which millimeter waves can pass, and can be rotated substantially horizontally by 360 degrees about the waveguide 9 as a rotation axis. In order to rotate the antenna 7,
Drive shaft 1 that can obtain drive output from a drive source such as a small motor
The drive gear 11 and the driven gear 12 attached to 0 are engaged with each other, and the waveguide 9 inserted into the rotation center of the driven gear 12 is
It is supposed to rotate with the drive of the motor. Thus, when the display unit 4 of the display device 3 is held in a substantially horizontal direction, the waveguide 9 that is positioned in a substantially vertical direction is rotated, thereby causing the waveguide 9 to move. The attached antenna 8 rotates substantially 360 degrees in the horizontal direction, and it is possible to detect in which direction the base station 2 is located.

Since the base stations 2 ... Are provided on the side wall, ceiling wall, etc. of the premises, the antenna 7 for receiving the base station transmission wave emitted from any one of the base stations 2 is Of course, the transmission wave from diagonally above is also made receivable. Although the horn antenna is the antenna 7 in the embodiment shown in FIG. 4, the antenna unit 5 may be configured by using, for example, an array antenna or a microstrip antenna.

As described above, the antenna 7 has an appropriate speed (for example, 100 revolutions / minute) based on the driving force of the driving source.
It is possible to determine that the base station 2 is located in the main beam radiation direction of the antenna 7 at the antenna position while detecting the antenna position that can most strongly receive the base station transmission wave while rotating at. Here, as a search method for detecting the direction of the base station 2, the position at which the antenna 7 can receive the base station transmission wave at a predetermined level or higher is set to the base station 2
Even if it is determined that the direction where the
The antenna 7 is rotated to store the maximum level of the base station transmission wave during that time, and the antenna 7 is received at the point where the base station transmission wave equal to the maximum level stored during the next rotation is received.
The rotation of may be stopped.

Further, the antenna 7 is not limited to the case where the rotation is stopped at the position facing the base station 2, but the rotation of the antenna 7 is continued, and the facing position between the antenna 7 and the base station 2 is determined / updated at each rotation. It may be configured to do so. Further, the rotation driving structure of the antenna 7 is not limited to the above-mentioned embodiment, and any structure can be used as long as the transmission direction of the base station transmission wave can be searched in a substantially horizontal direction. Further, from the viewpoint of reducing the weight and size of the display device 3 itself, an antenna rotation knob or the like is provided so that the antenna 7 can be manually rotated, and the antenna position at which the reception level of the antenna 7 is maximum is set. It may be possible to confirm with a meter and set the position as a position where the base station 2 and the antenna 7 face each other.

As described above, the antenna 7 serves as the base station 2
By detecting the direction of, the angle between the predetermined standby position of the antenna 7 and the base station detection position can be obtained. For example, as shown in FIG. 5, the reception direction at a predetermined standby position of the antenna 7 with respect to the main body of the display device 3 is a reference direction A, and a relative angle that is an angle formed by the base station detection direction with respect to the reference direction A. Can be detected. For example, a relative angle of 0 degrees in FIG. 5A, a relative angle of 90 degrees in FIG.
In (c), the relative angle is 135 degrees.

The relative angle obtained as described above is used to correct the display state of the guide map displayed on the display section 4 of the display device 3. The outline will be described below. For example, when the relative angle is 0 degree, the guide map data is displayed as it is without correction (see FIG. 5A), and when the relative angle is 90 degrees, the relative angle deviation occurs. The guide map data is corrected and displayed so that the display of the guide map is rotated by 90 degrees (see FIG. 5 (b)). When the relative angle is 135 degrees, the relative angle is 135 degrees in the direction in which the relative angle occurs. The guide map data is corrected and displayed so that the display of the guide map is rotated (see FIG. 5C).

By doing so, the display unit 4 of the display device 3 is provided with respect to the base station 2 regardless of the direction in which the person carrying the display device 3 is holding the display device 3. The display contents of the guide map are displayed in a fixed direction. That is, in the embodiment shown in FIG. 5, the display unit 4 of the display device 3 is arranged so that the angle formed by the main beam emission direction of the base station transmission wave and the reference direction A of the display device 3 is zero.
Is held in a substantially horizontal direction, if the guide map data is displayed on the display unit 4 of the display device 3 without being corrected, the base station 2 and the display device 3 in the real environment are displayed.
Since the guide map data supplied from the base station 2 to the display device 3 is set in advance so that the line connecting to and becomes parallel to the reference direction A in the pseudo environment of the guide map displayed on the display unit 4, An angle on a substantially horizontal plane formed by a predetermined reference direction A with respect to the display device 3 and a transmission wave from the base station 2 which is receiving,
By correcting the guide map data, the real environment of the area where the display device 3 is located and the pseudo environment of the guide map displayed on the display unit 4 of the display device 3 can be relatively equalized. is there.

Even when the guide map data supplied from the base station 2 to the display device 3 is not set in advance in a state in which the transmission direction of the base station 2 is taken into consideration, the base station in the pseudo environment on the display based on the guide map data. 2 and the base station 2 in the real environment
The correction angle is set in advance as one of the position information of the base station 2 so that it is parallel to the transmission direction, and the guide map data is corrected in each display device 3 by the correction angle. If the angle formed by the reference direction A in 3 and the transmission direction of the base station 2 is corrected, the actual environment in the area where the carrier of the display device 3 is located and the guide map displayed on the display unit 4 of the display device 3 are displayed. It is possible to make the pseudo environment relatively equal.

The relative positional relationship between the base station 2 and the display device 3 cannot be determined because the distance between the base station 2 and the display device 3 cannot be determined because only the transmission / reception direction is a determining factor. It is relatively difficult to accurately grasp the point where is located and display it on the guide map of the display unit 4. However, if the base stations 2 are arranged at relatively short distances so that the base station 2 capable of transmission and reception changes when the wearer of the display device 3 moves a few meters, the wearer of the display device 3 can be positioned. There is no problem as long as it is possible to grasp a highly probable region with an error of a few meters and to recognize the current position as a guide map in a wide premises.

Since the millimeter wave used for transmission and reception between the base station 2 and the display device 3 has a strong directivity, the base station 2
The area in which the millimeter wave emitted by the antenna can be received is limited to some extent, and there is a possibility that a blind spot in which transmission / reception cannot be performed with any base station 2 occurs. However, if a plurality of transmission / reception antennas are provided in the respective base stations 2 in different directions, the area capable of transmission / reception with the display device 3 can be covered more widely. In addition, depending on the emission condition of the transmission wave from the base station 2, ...
In some cases, the reception level of the base station transmission wave generated by the above-mentioned transmission may be substantially the same level. In such a case, a reference level that can be received by the display device 3 is set in advance,
By setting so that the reception level of the transmission wave emitted from any of the base stations does not reach the reference level, it is possible to prevent over-interference of the plurality of base stations 2.

Next, a concrete configuration example of the correction and display function of the guide map data of the display device 3 will be described with reference to FIG. In this embodiment, the guide map data for the premises of the structure is supplied from the base station 2, and the display device 3 is used without correcting the guide map data as in the embodiment shown in FIG.
Is displayed on the display unit 4 of the base station 2 so that the line connecting the base station 2 and the display device 3 in the real environment is parallel to the reference direction A in the pseudo environment of the guide map displayed on the display unit 4. The guide map data supplied to the display device 3 is set in advance. The function of sending a command from the display device 3 to the base station 2 based on the operation of the operation button 6 or the like is omitted.

As described above, the antenna 7 of the display device 3 detects 360 degrees in the horizontal direction by the antenna driving means 13 such as a small motor, and the signal received by the antenna 7 is compared with the reception level comparing and judging means 14. The guide map data is supplied to the guide map data storage means 15, and the guide map data obtained from the transmission wave of the base station 2 is stored and held in the guide map data storage means 15. On the other hand, when the antenna driving means 13 drives the antenna 7, the angle of the antenna 7 rotated from the predetermined standby position is detected by the relative angle detecting means 16, and the angle detected by the relative angle detecting means 16 is: It is always supplied to the guide map data correcting means 17.

When the reception level comparison / determination means 14 for determining whether or not the level of the received transmission wave from the base station 2 is a predetermined reference level, determines that the reception level has reached the reference level. Therefore, a signal to that effect is supplied to the guide map data correcting means 17, and the angle supplied from the relative angle detecting means 16 at the time of inputting the signal is recognized by the guide map data correcting means 17 as relative angle detection information. is there. Based on the relative angle detection information thus obtained, the guide map data correction means 17
The guide map data supplied from the guide map data storage means 15 is corrected, and the corrected guide map data is supplied to the frame memory 19 of the guide map display means 18.

By storing the guide map data corrected by the guide map data correcting means 17 in the frame memory 19 as described above, the same display content is continuously displayed on the display section 4. In the embodiment shown in FIG. 6, even after the guide map is displayed once, the antenna drive means 13, the reception level comparison and determination means 14, the guide map data storage means 15, the relative angle detection means 16, and the guide map data correction means 17 are provided. The guide map data is sequentially supplied from the base station 2 even if the wearer of the display device 3 changes the holding direction of the display device 3 or moves toward the destination. At the same time, the guide map data is corrected so that an appropriate guide map can always be displayed on the display unit 4.

Next, the display device 3 is operated as described above.
An example of the flow of processing for correcting the guide map displayed on the display unit 4 will be described with reference to the flowchart of FIG. 7.

For example, the display device 3 receives the radio wave of the base station by the antenna 7 and measures the radio wave level of the received radio wave when the power supply is turned on and the start of detection of the base station transmission wave is instructed. Then, the measured value is stored as a and stored, and it is determined whether or not the measured value a is equal to or higher than a predetermined reference level. If the measured value a is not below the reference level this time, the antenna drive source 13 The barrel pulse motor is turned on, and the antenna 7 is rotated by a predetermined angle based on the pulse input. By integrating the pulses supplied to the pulse motor, the angle at which the antenna 7 is moved from the reference standby position of the antenna 7 as the motor rotates is determined.

As described above, the base station radio wave is received again with the rotation angle of the antenna 7 changed, and processing is performed to determine whether the radio wave level measurement value a is equal to or higher than the reference level. When the measured value a does not reach the reference level, only the angle of the antenna 7 is changed in the same manner as above. Here, when the measured value a is equal to or higher than the reference level, the angle rotated by the motor from the antenna origin position, which is the reference standby position of the antenna 7, is obtained as the deviation angle from the integrated value of the pulses, and the deviation angle Only the guide map data is corrected and the sketch screen displayed on the display unit 4 of the display device 3 is changed. Moreover, after changing the sketch screen, the motor is turned on to drive the antenna 7 to prepare for the display change accompanying the movement of the display device 3.

As described above, according to the millimeter-wave radio premises guide system including the base station 2 and the display device 3, the base station 2 and the display device 3 are provided by the millimeter wave having a high transmission speed and a strong directivity. Since the transmission and reception are performed by and, the processing speed of the transmission and reception performed between the base station 2 and the display device 3 can be improved, and the display device 3 can receive the transmission wave of the base station 2 emitted from a certain direction. Can be done if possible. Therefore, the base station 2
The display device 3 which has received the transmitted wave from is capable of promptly detecting the angle formed by the relative angle detecting means 16 between the reference direction A and the direction of the received wave.

As described above, the guide map data correcting means 17 corrects the guide map data supplied from the guide map data accumulating means 15, based on the detected angle detected by the relative angle detecting means 16 rapidly, and the guide map data is corrected. The guide map display means 18 displays the guide map based on the guide map data corrected by the means 17, so that the display device 3
Display device 3 regardless of the holding direction of
The guide map can be displayed in a state where the real environment of the area where is located and the pseudo environment of the guide map displayed on the display device 3 are relatively equal.

That is, it is possible to make the mistaken recognition of the pseudo environment of the guide map displayed in the display device 3 in a substantially horizontal direction and the real environment of the point where the display device 3 is located and the surrounding environment. It is possible to provide a guide system on the premises that allows the carrier of the display device 3 to accurately and quickly grasp the directions to the destination without relying on the guide display boards installed on the premises of structures such as stations. It becomes.

8 and 9 illustrate a specific example of the display content enlargement function added to the display device 3. As shown in FIG. For example, when the magnifying function is activated when the guide map as shown in FIG. 8A is displayed, as shown in FIG. 8B, the target specific area from the current position to the destination is magnified. Is displayed. Further, as shown in FIG. 9, the display unit 4 is a matrix composed of small sections having the same aspect ratio as that of the display unit 4 (for example, A to E in the horizontal direction,
By configuring the vertical direction from 1 to 5) and designating any two subdivisions located on the diagonal line, it is possible to perform enlarged display such that the designated subdivisions are located in the corners. . For example, in FIG. 9A, which is the guide map display state in the standard size, when the small section 1A and the small section 4D are designated and enlarged and displayed, the display unit 4 of the display device 3 is displayed.
An enlarged display as shown in Fig. 9 (b) is made on the small section 2B.
When the small section 3C is designated and enlarged and displayed, the enlarged display as shown in FIG. 9C is performed on the display unit 4 of the display device 3. By doing so, it is possible to enlarge and display any place desired by the wearer of the display device 3.

[0038]

As described above, according to the millimeter-wave radio premises guiding system of the present invention, transmission and reception are performed between the base station and the transmission / reception terminal by a millimeter wave having a high transmission speed and strong directivity. It is possible to improve high-speed processing of transmission and reception performed between the base station and the transmission / reception terminal, and even when a large amount of data including image data is supplied from the base station to the transmission / reception terminal, the transmission / reception terminal instantaneously processes the data. It becomes possible. Therefore, even if the carrier of the transmitting / receiving terminal is walking, it is possible to effectively transmit / receive data between the base station and the transmitting / receiving terminal, and further, the transmitting / receiving terminal receiving the transmission wave from the base station, Since the angle formed by the reference direction and the direction of the received wave can be quickly detected by the relative angle detection means, it is possible to display a guide map that has been appropriately processed.

The guide map data correcting means corrects the guide map data on the basis of the detected angle detected by the relative angle detecting means as described above, and the guide map displaying means on the basis of the guide map data corrected by the guide map data correcting means. By displaying the guide map, the relative environment of the actual environment around and around the point where the transmitting / receiving terminal is located and the simulated environment of the guide map displayed on the transmitting / receiving terminal are relatively independent of the reference direction of the transmitting / receiving terminal. The guide map can be displayed.

That is, the false environment of the guide map displayed in a substantially horizontal direction on the transmitting / receiving terminal and the real environment around the point where the transmitting / receiving terminal is located are erroneously recognized. Since it becomes possible to provide a guide system on the premises that the carrier of the transmitting / receiving terminal can accurately and quickly grasp the route to the destination without relying on the guide display board installed on the premises of the structure such as is there.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a first embodiment of a guide system according to the present invention.

FIG. 2 is a schematic configuration diagram of a second embodiment of the guide system.

FIG. 3 is a perspective view of a display device which is a transmission / reception terminal.

FIG. 4 is a schematic vertical cross-sectional view of an antenna unit in a display device.

FIG. 5 is an explanatory diagram showing a display state of a display unit according to an angle formed by a transmission direction of a base station and a reference direction of a display device.

FIG. 6 is a block diagram showing a schematic configuration of a display device.

FIG. 7 is a flowchart showing an outline of operation of the display device.

FIG. 8 is an explanatory diagram of a first embodiment of a function of enlarging a guide map display on a display device.

FIG. 9 is an explanatory diagram of a second embodiment of the function of enlarging the guide map display on the display device.

[Explanation of symbols]

 2 base station 3 display device 16 relative angle detection means 17 guide map data correction means 18 guide map display means

Claims (1)

[Claims] 1. A guide comprising a base station which is installed in advance at a plurality of locations on the premises of a structure and has a millimeter wave transmission / reception function with high directivity, and a transmission / reception terminal capable of transmitting / receiving millimeter waves to / from the base station. In the system, a guide map display means for horizontally displaying a guide map based on guide map data of a point where the transmission / reception terminal is located and surroundings, and a reference direction predetermined for the transmission / reception terminal and a base station receiving Relative angle detecting means for detecting the angle on the horizontal plane formed by the transmission, and the guide map data of the point where the transmitting and receiving terminal is located and the surrounding are based on the detection information of the relative angle detecting means, and the point where the transmitting and receiving terminal is located and Guide map data correction means for relatively equalizing the surrounding real environment and the simulated environment of the guide map displayed on the transmitting / receiving terminal. , A millimeter-wave radio premises guide system, which is provided in a transmitting / receiving terminal.