JP2007288267A - Communication method in construction site - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication method capable of improving a communication state at high-rise parts of a building being a construction object. <P>SOLUTION: A tower crane 20 includes a swivel base 21 located on a tower 23, and a jib 25 using the swivel base 21 for a fulcrum, and installed adjacent to the building 10. The height of the swivel base 21 of the tower crane 20 is changed. An antenna 31 connected to a base station 30 making wireless communication with mobile terminals used by workers working inside the building 10 and relaying a communication signal between each mobile terminal and an external communication apparatus outside the building 10 is installed at a height of the swivel base 21 or over. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a communication method at a construction site.

In building construction sites, wireless communication is frequently used as an information transmission means between workers, and workers carry wireless communication devices. In wireless communication at construction sites, radio waves from the ground may be difficult to reach, especially on higher floors. In such a case, in order to avoid a situation where communication is impossible, a high-output communication device is used, or a base station is installed at a high place. For example, Patent Document 1 discloses a mechanism in which a relay device is arranged at a high place by installing the relay device on a balloon.
JP 2000-49677

  However, in the method described in Patent Document 1, it is necessary to newly introduce a balloon, and the installation of the relay device is expensive. In addition, since the height of the construction object increases as the construction process proceeds, the method described in Patent Document 1 needs to adjust the height of the balloon according to the height of the construction object. Therefore, a work separate from the construction work, which is a balloon setting work, is generated, and the work load increases for the worker.

  This invention is made in view of such a background, and it aims at providing the communication method which can improve the communication condition in the high-rise part of the building of construction object.

  Invention of Claim 1 among the present invention for solving the above-mentioned subject is provided with a swivel placed on a tower and a jib with the swivel as a fulcrum, and is installed adjacent to a building, A communication method at a construction site of the building using a tower crane in which the height of the swivel base changes, and performs wireless communication with a portable terminal used by an operator working inside the building, and the portable terminal and the It is assumed that an antenna connected to a base station that relays a communication signal to / from a communication device outside the building is installed at a portion of the tower crane at a height near the swivel base.

  According to the communication method of the present invention, since the antenna of the base station is provided in the vicinity of the swivel of the tower crane used for the work on the high-rise portion of the building to be constructed, The antenna can always be kept close. Therefore, the base station can stably perform wireless communication with the worker's mobile terminal. Therefore, stable communication with the outside of the building can be performed on the high floor of the building to be constructed.

  Moreover, invention of Claim 2 among the present invention is the communication method in the construction site of Claim 1, Comprising: The said some antenna is made into the site | part of the said tower crane of the height of the said turntable vicinity. It is assumed that each antenna is directed to a different part of the building. In this case, even if the antenna has directivity, the range incapable of receiving in the building can be reduced by shifting the directivity directions of the plurality of antennas. Therefore, a favorable and stable wireless communication environment can be provided at the construction site.

Moreover, invention of Claim 3 among the present invention is the communication method in the construction site of Claim 1, Comprising: The said some antenna is made into the site | part of the said tower crane of the height of the said turntable vicinity. An antenna angle adjuster that is installed and controls the directivity direction of each antenna in accordance with an input signal, and an information processing device having a CPU and a memory is connected to the antenna angle adjuster so as to be able to communicate; The processing device stores the height of the building, and the information processing device stores the antenna so that all of the antennas are directed to different parts of the building according to the stored height of the building. The information processing apparatus outputs the signal for controlling the antenna to face the calculated directivity direction to the antenna angle adjuster.
In this case, the directivity directions of the plurality of antennas can be set to be shifted according to the height of the building. Therefore, it is possible to reduce the range in which reception is not possible in the building. Therefore, a favorable and stable wireless communication environment can be provided at the construction site.

Moreover, invention of Claim 4 among the present invention is the communication method in the construction site of Claim 3, Comprising: The said information processing apparatus installs the said antenna from the reference position of the height direction of the said building. The vertical direction distance β to the position being stored is stored, and the information processing apparatus displays the m-th (m = 1,..., N) antenna directivity direction, the number of antennas n, and the building The angle θ _m (= tan ⁻¹ [{(C / 2n) + (C / n) × (m−1) −β} / x) with respect to the horizontal direction when the horizontal distance from the antenna to the antenna is x. ).

  In this case, the n antennas are in charge of the entire building, and the antennas are directed uniformly throughout the building. Therefore, the receiving range of the antenna can be set effectively.

  Moreover, invention of Claim 5 among the present invention is the communication method in the construction site of Claim 4, Comprising: The measuring device which measures the height in which the said antenna is installed in the said information processing apparatus The information processing device receives the height of the antenna measured by the measuring device from the measuring device, and the information processing device calculates the height of the antenna from the height of the building. By subtracting, the vertical distance β is calculated. In this case, even if the construction process progresses and the tower crane is extended and the height at which the antenna is installed changes, the measuring instrument can measure the height of the antenna, so that the operator can There is no need to set. Then, the directivity direction of the antenna is adjusted by the information processing apparatus according to the changed height of the base station. Therefore, a stable wireless communication environment can be realized even if the height of the antenna changes.

  Moreover, invention of Claim 6 among the present invention is the communication method in the construction site of Claim 3, Comprising: The said base station and the said information processing apparatus are connected so that communication is possible, The said base station is The number of incoming calls from the mobile terminal is counted for each antenna, the information processing device receives the number of incoming calls for each antenna from the base station, and the information processing device The signal for controlling the directivity direction of the antenna having the smallest number of incoming calls is output to the antenna angle adjuster so as to coincide with the current directivity direction of the most antennas. In this case, a larger number of antennas are directed toward a part of the building where the number of incoming calls is large. Accordingly, since more antennas can be used from a crowded building portion, the number of portable terminals capable of simultaneous communication can be increased. Therefore, a more stable wireless communication environment can be realized even when the number of calls is biased by each layer.

  Other problems and solutions to be disclosed by the present application will be made clear by the embodiments of the invention and the drawings.

  ADVANTAGE OF THE INVENTION According to this invention, the communication condition in the high-rise part of the building of construction object can be improved.

  FIG. 1 is a diagram illustrating a configuration example of a communication system at a construction site according to the present embodiment. In the communication system according to the present embodiment, a worker who works inside the building 10 at a construction site that constructs the building 10 such as a building uses a portable terminal (not shown), for example, the headquarters or the construction owner. It is assumed that a telephone call or data communication is performed with a communication device (not shown) installed outside the building 10.

  As shown in FIG. 1, a tower crane 20 that performs work on a high-rise portion of the building 10 is installed adjacent to the building 10. In the tower crane 20, a swivel base 21 is supported by a base 22 and a tower 23 (also referred to as a mast), and a cab 24 and a boom 25 are disposed on the swivel base 21.

  Further, in the communication system of the present embodiment, the base station 30 is provided on the swivel base 21 of the tower crane 20. In this embodiment, the base station 30 is a device that relays between a wireless communication network and a wired communication network when a portable terminal carried by a worker performs wireless communication. As the base station 30, for example, a relay device that relays a call signal between a mobile phone and a PHS (Personal Handyphone System) to a public telephone line, or a communication received from a mobile terminal in a wireless LAN (Local Area Network) A transfer device (so-called access point) that transmits data to another terminal can be used. In addition, the base station 30 is installed at a distance that can be operated from the cab 24 of the tower crane 20, and can input a set value to the base station 30 from the cab 24 as described later. Yes.

  A communication cable 40 is connected to the base station 30, and the portable terminal of the worker can communicate with an external terminal via the base station 30. As the communication cable 40, for example, a transmission cable for voice data of a mobile phone or PHS, a LAN cable for data communication such as TCP / IP communication, or the like can be used according to the portable terminal of the worker. The communication cable 40 is wired along the tower 23 from the base station 30 installed on the turntable 21. By wiring along the tower 23, it is possible to prevent the communication cable 40 from interfering with the operation of the tower crane 20.

  The communication cable 40 has a length that can reach the base station 30 installed on the swivel 21 of the tower crane 20 from the ground when the construction object 10 is completed. A surplus length portion 41 is formed on the top.

  As described above, in the communication system according to the present embodiment, the base station 30 is provided on the tower crane 20 that performs work on the high-rise part of the building 10, so that the base station 30 is always connected to the high-rise part of the construction 10. It can be installed at a height close to. Thereby, the base station 30 can stably receive the radio waves from the portable terminal of the worker who works at the high-rise part of the building 10. Therefore, it is possible to reduce the possibility that wireless communication using the base station 30 becomes impossible in the high-rise part of the building 10, and to provide a favorable and stable wireless communication environment in the building 10.

  Further, since wired communication is performed from the base station 30 to the ground using the communication cable 40, the communication state from the base station 30 to the outside is better than that of wireless communication. Therefore, the communication system of this embodiment can make not only the radio communication environment on the higher floor of the building 10 but also the radio communication environment of the entire construction site favorable and stable. For example, at the construction site, other work is often performed simultaneously on the middle floor while constructing the high floor of the building, and depending on the work content, radio wave obstacles are installed on the middle floor, Wireless communication between the section and the ground may be difficult. However, according to the communication system of the present embodiment, it is possible to stably perform communication between the high-rise part and the ground.

  In addition, since the base station 30 is installed at a high position, the line-of-sight range from the base station 30 is wider than when installed on the ground, and the direct wave from the base station 30 is a portable terminal of the worker. Easier to reach. Therefore, the electric field strength can be increased in the high-rise part of the building 10, and the communication status can be improved.

  FIG. 2 is a diagram showing a schematic configuration of the base station 30. As shown in the figure, the base station 30 includes an antenna 31, an antenna angle adjuster 32, a control device 33, and a distance measuring device 34.

  In the present embodiment, the base station 30 includes a plurality of antennas 31 and each antenna 31 has directivity. Each antenna 31 is disposed so as to be rotatable about a rotation shaft 35. In the example of FIG. 2, when the construction object 10 is on the right side of the base station 30 and the antenna 31 is arranged vertically, the directivity direction 36 of the antenna 31 is assumed to be horizontal in the right direction.

  The antenna angle adjuster 32 adjusts the directivity direction 36 of the antenna 31 by adjusting the inclination of each antenna 31. The antenna angle adjuster 32 may adjust the directivity direction of the antenna 31 by other known methods in addition to adjusting the inclination of the antenna 31.

  The distance measuring device 34 is disposed on the lower surface side of the swivel base 21 and measures the distance from the swivel base 21 to the base 22, that is, the height of the swivel base 21 from the base 22. The distance measuring device 34 can emit, for example, an ultrasonic wave, a laser, an infrared ray, or the like toward the base 22, and can measure the distance from the distance measuring device 34 to the base 22 by receiving the reflection.

  The control device 33 controls the distance measuring device 34 and the antenna angle adjuster 32. As the control device 33, for example, a general computer such as a personal computer can be used.

  A configuration example of a general computer used for the control device 33 is shown in FIG. As shown in the figure, the control device 33 includes a CPU 331, a memory 332, a storage device 333, a first I / O interface 334, a second I / O interface 335, an input device 336, and an output device 337. The storage device 333 is, for example, a hard disk drive, a CD-ROM drive, or a flash memory that stores programs and data. The CPU 331 provides various functions by reading the program stored in the storage device 333 into the memory 332 and executing it. The first I / O interface 334 is an interface for connecting to the antenna angle adjuster 32. The second I / O interface 335 is an interface for connecting to the distance measuring device 34. The first I / O interface 334 and the second I / O interface 335 perform communication between the antenna angle adjuster 32 and the distance measuring device 34 in accordance with a protocol such as RS232C, RS485, or USB. The input device 336 is, for example, a keyboard, a mouse, a touch panel, a microphone, or the like that accepts data input from a user. The output device 337 is, for example, a display or a speaker that outputs data.

  FIG. 4 is a functional block diagram of the control device 33. As shown in the figure, the control device 33 includes a distance measuring device control unit 311, a swivel base height acquisition unit 312, a set value storage unit 313, a set value input unit 314, a directivity direction calculation unit 315, and an antenna control unit 316. I have. The distance measuring device control unit 311, the swivel base height acquisition unit 312, the set value input unit 314, the directivity direction calculation unit 315, and the antenna control unit 316 are stored in the storage device 333 by the CPU 331 provided in the base station 30. The setting value storage unit 313 is realized as a storage area provided by the memory 332 or the storage device 333.

  The set value storage unit 313 stores a set value used for determining the directivity direction of the antenna 31. FIG. 5 shows a configuration example of the set value storage unit 313. FIG. 6 is a diagram for explaining various distances used for determining the directivity direction of the antenna 31. As shown in FIG. 5, in the set value storage unit 313, the height (h1) of the base 22, the vertical distance (α) from the distance measuring device 34 to the antenna 31, and the vertical distance from the antenna 31 to the top of the building. (Β), the horizontal distance (x) from the antenna 31 to the building, and the vertical distance from the distance measuring device 34 to the base 22 (hereinafter also referred to as a swivel height) (h) are stored.

The set value input unit 314 receives the set values h1, α, β, and x input from the user, and stores the received set values in the set value storage unit 313.
The distance measuring device control unit 311 controls the distance measuring device 34 to measure the swivel height h, and the swiveling table height acquisition unit 312 is measured by the distance measuring device 34 according to the control by the distance measuring device control unit 311. The swivel base height h is acquired, and the acquired swivel base height h is stored in the set value storage unit 313.

  The directivity direction calculation unit 315 determines the directivity direction of each antenna 31 using each setting value stored in the setting value storage unit 313 and the swivel base height h acquired by the swivel base height acquisition unit 312. The antenna control unit 316 controls the antenna angle adjuster 32 so that the directivity direction of each antenna 31 becomes the directivity direction determined by the directivity direction calculation unit 315.

  FIG. 7 shows a flow of processing for changing the directivity direction of the antenna 31 by the control device 33. In addition, the control apparatus 33 shall perform the process shown in FIG. 7 regularly at a predetermined interval.

  The distance measuring device control unit 311 controls the distance measuring device 34 to measure the swivel height h, and the swiveling table height acquisition unit 312 acquires the swivel height h measured by the distance measuring device 34 (S501). If the swivel base height h measured here is the same value as the swivel base height h stored in the set value storage unit 313 (S502: NO), the process ends.

  On the other hand, when the measured swivel base height h is different from the swivel base height h stored in the set value storage unit 313 (S502: YES), the swivel base height acquisition unit 312 uses the acquired swivel base height h as a set value. Registration is performed in the storage unit 313 (S503).

  The directivity direction calculation unit 315 includes a height h1 of the base 22 stored in the setting value storage unit 313, a vertical distance α from the distance measuring device 34 to the antenna 31, a vertical distance β from the antenna 31 to the top of the building, And the height of the turntable h is added to calculate the height (vertical distance from the ground to the building) C of the building (S504). The directivity calculation unit 315 performs the following processing for each m-th (m = 1 to n) antenna 31 where n is the number of antennas 31 (S505).

アンテナ制御部３１６は、アンテナ３１の傾斜が、指向方向算出部３１５が算出した傾斜角θ_ｍとなるように、アンテナ角度調整器３２を制御する（Ｓ５０７）。 The directivity direction calculation unit 315 calculates the inclination angle θ _m with respect to the vertical direction of the m-th antenna 31 by the following equation (1) (S506). Note that the inclination angle θ _m is 0 degrees when the antenna 31 is perpendicular to the vertical direction, and the directivity direction 36 of the antenna 31 is horizontal from the antenna 31 toward the building 10 when the inclination angle θ is 0 degrees. In the case of -90 degrees, the vertical direction is upward, and in the case of 90 degrees, the vertical direction is downward.

The antenna control unit 316 controls the antenna angle adjuster 32 so that the inclination of the antenna 31 becomes the inclination angle θ _m calculated by the directivity direction calculation unit 315 (S507).

FIG. 8 shows an example in which the directivity direction of the antenna 31 is changed. In the example of FIG. 8, the base station 30 includes three antennas 31 (n = 3), the base height h 1 = 1 m, the vertical distance α = 2 m from the distance measuring device 34 to the antenna 31, and from the antenna 31. The vertical distance β to the top of the building 10 is 3 m, the vertical distance x from the antenna 31 to the building 10 is x = 5 m, and the swivel height h measured by the distance measuring device 34 is 30 m. In this case, according to the above equation (1), the inclination angle θ ₁ of the first (m = 1) antenna 31 is 30.964 degrees≈about 31 degrees, and the inclination angle of the second (m = 2) antenna 31. θ ₂ is 71.565 degrees≈about 72 degrees, and the inclination angle θ ₃ of the third (m = 3) antenna 31 is 79.509 degrees≈about 80 degrees. Accordingly, the first antenna 31 is directed to a location 6 m from the top of the building 10, the second antenna 31 is directed to a location 18 m from the top of the construction 10, and the third antenna 31 is directed to the construction 10 It will point to a location 30m from the top of the. That is, the height C (α + β + h + h1 = 36 m) of the building 10 is shared by 12 m (36 m ÷ 3) for each of the three antennas 31, and the first antenna 31 is 0 m to 12 m from the top of the building 10. ), The second antenna 31 is in charge of the middle layer (12 m to 24 m) of the building 10, and the third antenna 31 is in charge of the lower layer (24 m to 36 m) of the building 10. It can be seen that each of these points to the center of each layer in charge.

  As described above, according to the base station 30 of the present embodiment, the n antennas 31 can be set to have different directivity directions. Therefore, the range of radio waves that can be received by the antenna 31 can be expanded.

  Further, by directing the directivity direction of the antenna 31 to each layer of the construction object 10 as in the present embodiment, the worker can perform wireless communication using the base station 30 throughout the construction object 10. Therefore, smooth communication at the construction site can be realized.

  Further, the base station 30 of the present embodiment adjusts the directivity direction of the antenna 31 so that radio waves from each layer can be received uniformly according to the height C of the building 10 that can change according to the progress of the construction work. be able to. Accordingly, it is possible to increase the radio wave reception sensitivity of the antenna 31 from the construction object 10. For example, even when the building becomes taller, it is possible to prevent the reception sensitivity of radio waves from the vicinity of the top from being lowered, and to realize a favorable and stable wireless communication environment in the entire building 10. it can.

  In addition, the base station 30 of the present embodiment periodically measures the height at which the base station 30 is installed by the distance measuring device 34, and adjusts the directivity direction of the antenna 31 again when the height changes. Like to do. Therefore, the change in the altitude of the base station 30 that changes as the tower crane 20 expands and contracts is automatically detected, and the directivity direction of the antenna 31 is appropriately adjusted according to the height at which the base station 30 is placed. Can do. Therefore, it is possible to prevent the sensitivity of the directional antenna 31 from being lowered due to a change in the altitude at which the base station 30 is installed in accordance with the operation of the tower crane 20, and good and stable wireless communication in the entire building 10. An environment can be realized.

  Although the present embodiment has been described above, the above embodiment is intended to facilitate understanding of the present invention and is not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

  For example, in the present embodiment, the base station 30 is installed on the swivel base 21 of the tower crane 20, but other than this, for example, it may be installed in the boom, the cab 24, or the tower 23. In other words, the location may be any location whose location increases as the construction object 10 increases as the construction work progresses.

  In this embodiment, the setting value is directly input to the control device 33 of the base station 30. For example, the control device 33 is provided with a communication interface and is connected to the control device 33 via the communication cable 40. The setting value may be transmitted from an external device.

  In this embodiment, the base station 30 relays between the wireless communication network and the wired communication network. However, the relay relays between the wireless communication connecting the base station 30 to the outside by wireless communication. It may be a device. In this case, since it is not necessary to lay the communication cable 40, a wireless communication environment can be easily constructed. In addition, a plurality of base stations 30 that perform radio relay are provided in the tower 23, and radio waves are relayed between the base stations 30, so that radio waves are relayed between the upper layer portion of the building 10 and the ground. Also good. Thus, radio waves can be reliably relayed without using the communication cable 40.

  Moreover, in this embodiment, all the base stations 30 shall be installed in the turntable 21, but it is not restricted to this, For example, you may make it install the control apparatus 33 on the ground. In this case, the control device 33, the antenna angle adjuster 32, and the distance measuring device 34 can be communicably connected via the communication cable 40.

  Further, the distance measuring device 34 is installed on the lower surface of the swivel base 21 and measures the swivel height h. However, the present invention is not limited to this. For example, the distance measuring device 34 is installed on the base 22 or the ground. The height (C-β) of the antenna 31 may be measured. Further, a distance measuring device 34 is installed on the top of the building 10 to measure the distance from the distance measuring device 34 to the antenna 31. Based on the angle from the distance measuring device 34 to the antenna 31 and the horizontal distance x, The vertical distance β may be calculated.

  Further, the distance measuring device 34 may measure the vertical distance h, and measure the horizontal distance x, the height C of the construction object 10, and the like.

  Alternatively, a distance measuring device may be installed on the top of the building 10 to measure the height of the building 10 and transmit the measured height to the base station 30 by wireless communication.

  In the present embodiment, the tower crane 20 is installed independently of the construction object 10. However, the tower crane 20 may be installed on the top of the construction object 10. In this case, for example, the communication cable 40 can be routed along the tower 23 to the top of the construction object 10 and wired to the ground through the inside of the construction object 10.

  Further, in the present embodiment, all the antennas 31 are installed so that the directivity directions thereof are different from each other. However, for example, a plurality of antennas 31 that are directed to a layer having a large communication volume or a large traffic volume may be provided. In this case, for example, the base station 30 measures the communication amount for a predetermined time for each antenna 31 and makes the directivity direction of the antenna 31 having the smallest communication amount the same as the directivity direction of the antenna 31 having the largest communication amount. Set to In this way, by directing the plurality of antennas 31 to a place with a large amount of communication, the number of terminals capable of simultaneous communication can be increased. Therefore, it is possible to provide a wireless communication environment in which more mobile terminals can be used.

  In the present embodiment, the directivity direction of the antenna 31 is adjusted in the vertical vertical direction. However, the present invention is not limited to this, and horizontal adjustment may be performed. In this case, for example, a stable wireless communication environment can be provided even in a situation where the radio wave intensity of the wireless communication changes depending on the location even at the same level of the building. Furthermore, the directivity of the antenna 31 can be adjusted in both the vertical vertical direction and the horizontal direction.

It is a figure which shows the structural example of the communication system in the construction site which concerns on this embodiment. 2 is a diagram showing an outline of the configuration of a base station 30. FIG. It is a figure which shows the structural example of the general computer used for the control apparatus. 3 is a functional block diagram of a control device 33. FIG. The structural example of the setting value memory | storage part 313 is shown. It is a figure explaining the various distance used in order to determine the directivity direction of the antenna 31. FIG. It is a figure which shows the flow of the process which changes the directivity direction of the antenna 31 by the control apparatus 33. FIG. It is a figure which shows an example which changed the directivity direction of the antenna.

Explanation of symbols

10 construction, 20 tower crane, 21 swivel, 22 base,
23 tower, 24 cab, 25 boom, 30 base station, 31 antenna,
32 antenna angle adjuster, 33 control device, 34 distance measuring device,
35 rotation axis, 36 directivity direction, 40 communication cable, 41 extra length part,
311 distance measuring device control unit, 312 swivel height acquisition unit, 313 set value storage unit,
314 set value input unit, 315 directivity direction calculation unit, 316 antenna control unit,
331 CPU, 332 memory, 333 storage device,
334 1st I / O interface, 335 2nd I / O interface,
336 input device, 337 output device

Claims (6)

In the construction site of the building using a tower crane that includes a swivel placed on a tower and a jib that uses the swivel as a fulcrum, is installed adjacent to the building, and the height of the swivel varies A communication method,
An antenna connected to a base station that performs wireless communication with a mobile terminal used by an operator working inside the building and relays a communication signal between the mobile terminal and a communication device outside the building, Installing the tower crane at a height near the platform,
A communication method at a construction site characterized by the above. A communication method at a construction site according to claim 1,
A plurality of the antennas are installed in the tower crane at a height near the swivel,
Installing the antennas so that they point to different parts of the building,
A communication method at a construction site characterized by the above. A communication method at a construction site according to claim 1,
A plurality of the antennas are installed in the tower crane at a height near the swivel,
An antenna angle adjuster for controlling the directivity direction of each antenna according to the input signal is attached,
An information processing device having a CPU and a memory is connected to the antenna angle adjuster so as to be communicable,
The information processing device stores the height of the building,
The information processing apparatus obtains a directivity direction of the antenna according to the stored height of the building so that the antenna is directed to different parts of the building,
The information processing apparatus outputs the signal for controlling the antenna to face the calculated directivity direction to the antenna angle adjuster;
A communication method at a construction site characterized by the above. A communication method at a construction site according to claim 3,
The information processing apparatus stores a vertical distance β from a reference position in the height direction of the building to a position where the antenna is installed,
The information processing apparatus has a directivity direction of the m-th (m = 1,..., N) antenna, the number of the antennas is n, and the horizontal distance from the building to the antenna is x. Obtained as an angle θ _m (= tan ⁻¹ [{(C / 2n) + (C / n) × (m−1) −β} / x]) with respect to the horizontal direction;
A communication method at a construction site characterized by the above. A communication method at a construction site according to claim 4,
A measurement device that measures the height at which the antenna is installed is communicably connected to the information processing apparatus,
The information processing apparatus receives the height of the antenna measured by the measuring device from the measuring device,
The information processing device calculates the vertical distance β by subtracting the height of the antenna from the height of the building;
A communication method at a construction site characterized by the above. A communication method at a construction site according to claim 3,
The base station and the information processing apparatus are communicably connected,
The base station counts the number of incoming calls from the mobile terminal for each antenna,
The information processing apparatus receives the number of incoming calls for each antenna from the base station,
The information processing apparatus adjusts the antenna angle of the signal for controlling the directivity direction of the antenna with the smallest number of incoming calls so as to match the current directivity direction of the antenna with the largest number of incoming calls. Output to the container,
A communication method at a construction site characterized by the above.

Images