JP2009296481A - Wireless communication terminal, directivity control method, directivity control program, and recording medium with the program recorded thereon - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless communication terminal, directivity control method, directivity control program, and recording medium with the program recorded thereon in which stable communication can be efficiently performed even in a wireless communication environment including a communication between movable wireless communication devices. <P>SOLUTION: A wireless communication terminal 100 is a terminal including an antenna 20 for providing directivity and includes a directivity control means 13 or 19 for controlling a direction of the directivity on the basis of positional information of another terminal indicating a position of the other wireless communication terminal, positional information of a present terminal indicating a position of the relevant wireless communication terminal, and directional information of the present terminal indicating a direction of the relevant wireless communication terminal. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wireless communication terminal that performs communication using a wireless data transmission path, and particularly relates to a technique for controlling the directivity of an antenna in accordance with the positional relationship between an own device capable of wireless communication and another device. is there.

  In Patent Document 1, an area in which communication is possible between a plurality of base stations and mobile terminals is composed of a plurality of cells, and the base station controls the antenna directivity to change the communicable cells to be the same. A technique related to a wireless communication system that transmits a control signal in a direction and reduces transmission amount of the control signal to improve transmission efficiency is disclosed. Further, Patent Document 2 discloses that adaptive array processing is performed in uplink communication and signal transmission is performed selectively using an antenna having the highest reception level in downlink communication. A technique related to a wireless device that suppresses deterioration of communication quality due to interference when two-way communication is performed at the same frequency (maintains communication quality) and is realized at low cost is disclosed.

  As described above, in a wide-area wireless communication environment, transmission efficiency and communication quality are improved by using a directional antenna instead of a non-directional antenna.

  Incidentally, in recent years, not only a wide-area wireless communication environment as described above, but also a wireless local area network (LAN) environment in which a wireless communication terminal having a communication function can be easily connected by short-range wireless communication has become widespread. Yes.

  In general, a network environment called a LAN is composed of a single server and a plurality of terminals (clients) connected to each other so as to be able to communicate with each other. It is divided roughly into. In a wired LAN, it is necessary to arrange a communication cable or the like when constructing a network environment, which requires a certain amount of cost for construction. Moreover, in order for a terminal to communicate, it is necessary to connect to the arrange | positioned communication cable, Even if it is a terminal excellent in portability, the advantage will be impaired.

  On the other hand, a wireless LAN can easily construct a network environment by arranging a portable access point (AP) without requiring a communication cable. From this point of view, a wireless LAN has now been introduced into the network environment.

For example, there are many cases where a wireless LAN is introduced as a network environment in the company, and employees communicate with the terminal after moving with a wireless communication terminal (for example, a notebook PC (Personal Computer) or PDA (Personal Digital Assistant)). The network environment can be used without connecting to a cable. In addition, access points such as Hotspot (registered trademark) have begun to be established in the city, and are expected to be developed as public infrastructure in the future.
JP-A-11-55177 JP 2003-283411 A

  However, the conventional techniques disclosed in Patent Documents 1 and 2 are, for example, in data communication between a wireless communication device that is fixedly arranged and a movable wireless communication device, such as a base station and a mobile phone. It is intended to control the directivity of an antenna provided in a fixedly arranged wireless communication device, and is not intended for communication between movable wireless communication devices.

  Therefore, it cannot be said that the conventional technology can sufficiently cope with improvement in transmission efficiency and communication quality in a wireless communication environment including communication between movable wireless communication devices.

  Furthermore, in the short-range wireless communication environment, as can be seen from the examples of usage as described above, an information leakage due to unauthorized interception of communication is prevented and a highly confidential environment is desired.

  As described above, the conventional wireless communication system and wireless device have a function capable of controlling the directivity of the antenna that performs data transmission / reception, but do not perform control in consideration of the above-described problems.

  Therefore, in the related art, even if the wireless communication devices are movable, it is not possible to provide a wireless communication environment in which stable communication can be performed efficiently.

  In the present invention, in view of the above-described problems of the prior art, a wireless communication terminal, a directivity control method, and a directivity control program capable of performing stable and efficient communication even in a wireless communication environment including communication between movable wireless communication devices. And a recording medium on which the program is recorded.

  In order to achieve the above object, a wireless communication terminal according to the present invention is a wireless communication terminal including an antenna that forms directivity, and includes other device position information indicating the position of another wireless communication terminal, and the wireless communication terminal. And directivity control means for controlling the direction of the directivity based on own device position information indicating the position of the device and own device direction information indicating the direction of the wireless communication terminal.

  In order to achieve the above object, the wireless communication terminal of the present invention includes a rotation drive unit that rotates the antenna, and the directivity control unit rotates the antenna by the rotation drive unit, It is characterized by controlling the direction of directivity.

  In order to achieve the above object, the wireless communication terminal of the present invention provides a control value for rotationally driving the antenna based on the position information of the other apparatus, the position information of the own apparatus, and the direction information of the own apparatus. Wherein the rotation driving means rotationally drives the antenna based on the control value calculated by the first calculation means.

  In order to achieve the above object, in the wireless communication terminal of the present invention, the first calculation means calculates a rotation direction and a rotation angle of the antenna as a control value for rotationally driving the antenna. It is characterized by.

  In order to achieve the above object, the wireless communication terminal of the present invention has directivity forming means for forming directivity of a plurality of patterns by a multi-antenna composed of a plurality of antennas, and the directivity control means includes: When the directivity is formed by the directivity forming means, the direction of directivity to be formed is controlled.

  In order to achieve the above object, the wireless communication terminal of the present invention is configured so that the multi-antenna forms directivity based on the position information of the other device, the position information of the own device, and the direction information of the own device. The directivity forming means forms the directivity based on the control value calculated by the second calculating means.

  In order to achieve the above object, in the wireless communication terminal of the present invention, the second calculation means uses a phase control signal corresponding to each antenna of the multi-antenna as a control value for forming the directivity. An amplitude control signal is calculated.

  In order to achieve the above object, the radio communication terminal of the present invention controls the directivity control means so that the direction of directivity is positioned on a straight line connecting the radio communication terminal and the communication partner. It is characterized by that.

  In order to achieve the above object, the wireless communication terminal of the present invention has communication enable / disable determining means for determining whether or not communication is permitted, and the directivity control means is configured to determine whether or not the communication is possible. The direction of the directivity is controlled based on the determination result obtained by the above.

  In order to achieve the above object, the wireless communication terminal of the present invention is configured such that the directivity control means determines that the directivity null means has a directivity null when the communication possibility determination means determines that the communication partner is not allowed to communicate. Control is performed so that the point is located on a straight line connecting the wireless communication apparatus and the communication partner.

  In order to achieve the above object, the wireless communication terminal of the present invention has supply means for supplying power to the antenna, and the supply means has the directionality controlled by the directivity control means. In this case, the amount of power supplied to the antenna is reduced by a predetermined amount.

  In order to achieve the above object, the wireless communication terminal of the present invention includes an acquisition unit that acquires the position information of the other device from another wireless communication terminal, and a measurement unit that measures the distance from the wireless communication terminal to the communication partner. And the own device position calculating means for calculating the own device position information based on the other device position information acquired by the acquiring means and the distance measured by the measuring means.

  With such a configuration, the wireless communication terminal of the present invention enables the own device calculated from the position information of the other device acquired from the communication partner (other device), the position information of the other device, and the distance between the own device and the other device. Based on the position information and the measured direction information of the own device, the directivity of the antenna included in the own device is controlled. At this time, the radio communication terminal controls the direction of directivity by rotating the antenna or forming directivity in a predetermined direction.

  Accordingly, the wireless communication terminal of the present invention can perform efficient and stable communication even in a wireless communication environment including communication between movable wireless communication terminals.

  In order to achieve the above object, a directivity control method according to the present invention is a directivity control method in a wireless communication terminal including an antenna that forms directivity, and is position information indicating the position of another wireless communication terminal. A first calculation procedure for calculating a control value for rotationally driving the antenna based on own position information indicating the position of the wireless communication terminal and own direction information indicating the direction of the wireless communication terminal And a rotation driving procedure for rotating the antenna based on the control value calculated by the first calculation procedure, and a directivity for controlling the direction of the directivity by rotating the antenna by the rotation driving procedure. And a control procedure.

  By such a procedure, the directivity control method of the present invention allows the own device calculated from the position information of the other device acquired from the communication partner (other device), the position information of the other device, and the distance between the own device and the other device. The directivity control operation for controlling the direction of the directivity is realized by rotating the antenna based on the position information and the measured direction information of the own device.

  In order to achieve the above object, a directivity control method of the present invention is a directivity control method in a wireless communication terminal having a multi-antenna composed of a plurality of antennas that form directivity, and the other wireless communication terminal Because the multi-antenna forms directivity based on the other device position information indicating the position of the wireless communication terminal, the own device position information indicating the position of the wireless communication terminal, and the own device direction information indicating the direction of the wireless communication terminal. A second calculation procedure for calculating the control value, a directivity formation procedure for forming directivity of a plurality of patterns based on the control value calculated by the second calculation procedure, and the directivity by the directivity formation procedure. It is characterized in that the direction of directivity to be formed is controlled when forming the property.

  By such a procedure, the directivity control method of the present invention allows the own device calculated from the position information of the other device acquired from the communication partner (other device), the position information of the other device, and the distance between the own device and the other device. The directivity control operation for controlling the direction of directivity is realized by forming directivity in a predetermined direction based on the position information of the device and the measured direction information of the own device.

  As a result, the directivity control method of the present invention can provide a wireless communication terminal capable of performing efficient and stable communication even in a wireless communication environment including communication between movable wireless communication terminals.

  In order to achieve the above object, a directivity control program of the present invention is a directivity control program in a wireless communication terminal having an antenna that forms directivity, and indicates a position of another wireless communication terminal. Based on the apparatus position information, the own apparatus position information indicating the position of the wireless communication terminal, and the own apparatus direction information indicating the direction of the wireless communication terminal, it functions as directivity control means for controlling the direction of the directivity. .

  According to the present invention, even in a wireless communication environment including communication between mobile wireless communication terminals, a wireless communication terminal capable of performing efficient and stable communication, a directivity control method, a directivity control program, and the program are recorded. A recording medium can be provided.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the drawings.

[First Embodiment]
<Hardware configuration>
First, the hardware configuration of the wireless communication terminal according to the present embodiment will be described. FIG. 1 is a diagram illustrating a hardware configuration example of a wireless communication terminal 100 according to the first embodiment of the present invention.

  The wireless communication terminal 100 according to the present embodiment can be mainly considered in two corresponding forms. One is an information processing device such as a notebook PC or PDA having a communication function as shown in FIG. 1A and a digital camera, and the other is a communication function as shown in FIG. A communication control device such as a network interface card (NIC). In the following description, these devices are simply referred to as a wireless communication terminal 100.

(When the wireless communication terminal is an information processing device having a communication function)
A wireless communication terminal 100 shown in FIG. 1A includes a control device 10, an input device 11, an output device 12, a communication device 13, a storage device 14, a recording media drive 15, and a position / direction detection device 16. And an antenna rotation driving device 17.

  The input device 11 receives an operation from the user, and the output device 12 performs information notification (screen display, audio output, etc.) to the user.

  The communication device 13 performs wireless communication by a communication method using WiMedia (registered trademark) that can measure the distance to the communication partner with high accuracy in the physical layer. The WiMedia (registered trademark) standard is described in European standard ECMA-368 defined by ECMA-International (European association for standardizing information and communication systems). For example, the method described in “14. Ranging and location awareness” of ECMA-368 can be used for measuring the distance to the communication partner. Communication methods using WiMedia (registered trademark) in the physical layer include wireless USB (registered trademark), wireless IEEE 1394, next-generation Bluetooth (registered trademark), and Winet. In addition, since these communication systems using WiMedia (registered trademark) in the physical layer use short pulse waves, distance measurement with higher accuracy than conventional communication systems is possible.

  The storage device 14 stores various information and programs necessary for controlling the wireless communication terminal 100. The storage device 14 includes a ROM (Read Only Memory) and a RAM (Random Access Memory) that are main storage devices, and an HDD (Hard Disk Drive) that is an auxiliary storage device.

  For example, the ROM stores various programs including an OS (Operating System) that is basic software for controlling the entire wireless communication terminal 100, data used by the programs, and the like in a predetermined storage area. The RAM is used as a storage area for loading a program, a work area used when the loaded program is executed, and the like. The HDD is used as a storage area for various data such as application data and a virtual memory (storage) area for programs.

  The recording medium drive 15 reads / writes data from / to a storage medium (recording medium) 15a such as a floppy (registered trademark) disk, a CD (Compact Disc), a DVD (Digital Versatile Disk), or a flash memory.

  The position / direction detection device 16 detects the position and direction of the wireless communication terminal 100. The position is detected (coordinate value representing the position) using a positioning system such as GPS (Global Positioning System). The direction is detected by detecting the geomagnetism like an azimuth magnet using an electronic compass, for example, and detecting the direction (direction value indicating the direction) in which the wireless communication terminal 100 is facing. Here, the “direction value” is a value such as “angle N ° clockwise / counterclockwise (clockwise / counterclockwise)”. Moreover, it is good also as a structure which uses together the gyroscope which is a measuring device which detects the angular velocity of an object in consideration of the environment where geomagnetism is hard to detect from characteristics, such as a building.

  The antenna rotation driving device 17 rotates the antenna 20 clockwise or counterclockwise by a driving unit such as a small motor.

  The control device 10 controls each of the above devices. That is, the control device 10 includes a CPU (Central Processing Unit), and controls each of the above devices by executing a program loaded in the RAM.

(When the wireless communication terminal is a communication control device)
A wireless communication terminal 100 shown in FIG. 1B includes a control device 10, an input device 11, an output device 12, a communication device 13, a storage device 14, a position / direction detection device 16, and an antenna rotation driving device. 17 and an external device I / F 18.

  The difference from the hardware configuration shown in FIG. 1A is that the input device 11 and the output device 12 are not provided, and the wireless communication terminal 100 and an external device 200 such as a PC newly perform bidirectional communication. An external device I / F 18 that is an interface for performing the operation is provided. Therefore, in the hardware shown in FIG. 1B, the description of the same hardware as that shown in FIG.

  In the wireless communication terminal 100 described above, the configuration example in which the position / direction detection device 16 and the antenna rotation driving device 17 are provided in the terminal has been described. However, the present invention is not limited to this configuration. For example, the position / direction detection device 16 may be configured to connect to the wireless communication terminal 100 via a predetermined interface. The antenna rotation drive device 17 may be configured to be included in the antenna 20 itself.

<Directivity control function>
The wireless communication terminal 100 according to the present embodiment has a directivity control function for controlling the directivity of the antenna 20 of its own device (controlling the direction of directivity) with respect to a communication partner (another device), one of which is fixed. Further, efficient and stable communication is performed not only in the wireless communication terminals 100 that can move the other but also in a wireless communication environment that includes communication between the wireless communication terminals 100 that move with each other.

  Now, the configuration and operation of the directivity control function will be described. In the following description, operations performed between a plurality of wireless communication terminals 100 will also be described. Among them, the wireless communication terminal 100 that performs processing is referred to as “own device 100a”, and the wireless communication terminal 100 The communication terminal 100 is referred to as “another device 100b”.

<< Configuration >>
FIG. 2 is a diagram illustrating a configuration example (part 1) of the directivity control function according to the first embodiment of the present invention. The directivity control function includes a position information transmission / reception unit 31, an own device position calculation unit 32, a rotation control value calculation unit 33, and an antenna rotation control unit.

  The positional information transmission / reception unit 31 transmits / receives mutual positional information between the own device 100a and the other device 100b. For example, the own device 100a transmits the position information of the own device 100a detected by the position / direction detection device 16 described above in response to an acquisition request from the other device 100b. On the contrary, an acquisition request is made to the other device 100b, and the position information of the other device 100b is received. With this function unit, a plurality of wireless communication terminals 100 can share position information with each other.

  The own device position calculation unit 32 calculates the position of the own device 100a. The position of the own device 100a can be detected by the position / direction detection device 16 as described above, but may not necessarily be detected depending on the environment in which the own device 100a is placed. For example, an environment where GPS signals cannot be received is an example. For this reason, the directivity control function also has a function of calculating its own position on the assumption that it cannot be detected.

  Therefore, the own device position calculation unit 32 further includes a distance measurement unit to obtain various information necessary for calculating the position of the own device 100a. The distance measuring unit measures the distance from the own device 100a to the other device 100b by WiMedia (registered trademark) that can measure the distance from the other device 100b with high accuracy.

  As a result, when the position / direction detecting device 16 cannot detect the position information of the own apparatus 100a, the own apparatus position calculating section 32 receives the position information of the other apparatus 100b received by the position information transmitting / receiving section 31; Based on the distance between own device 100a and other device 100b, the position of own device 100a is calculated using a predetermined calculation formula. This own position calculation method will be described in detail later.

  The rotation control value calculation unit 33 calculates a control value for controlling the rotation of the antenna 20. Here, the directivity of the antenna 20 controlled by the control value calculated by the rotation control value calculation unit 33 will be briefly described with reference to the drawings.

(Difference in transmission / reception power distribution between non-directional and directivity)
FIG. 3 is a diagram illustrating an example in which constant transmission / reception power from the antenna 20 according to the first embodiment of the present invention is plotted. FIG. 3A illustrates a case where the antenna 20 is omnidirectional. FIG. 3B shows a plot example when the antenna 20 has directivity.

  When the antenna 20 is non-directional, as shown in FIG. 3A, it is plotted almost concentrically (at a constant distance) from the antenna 20 (transmission / reception power distribution curve 21 shown in the figure).

  On the other hand, when the antenna 20 has directivity, as shown in FIG. 3B, the antenna 20 is plotted so as to draw, for example, an “8” from the antenna 20 (transmission / reception power distribution curve 22 shown in the figure). ). That is, constant transmission / reception power is distributed in a specific direction.

As described above, in the case of non-directionality, the transmission / reception power is distributed in all directions, but in the case of directivity, it is distributed in a specific direction. It is distributed at a distance far from. That is, the directional antenna 20, communication exists and the hard direction D ₂ communicates with the direction D ₁ that allows good, in the direction D ₁ that communicate can be performed satisfactorily, the long-distance communication as compared to the non-directional Can be done.

Incidentally, it refers to communications difficulties direction D ₂ and null point. Hereinafter, “direction D _{1 in} which communication can be satisfactorily performed” is referred to as “directivity direction D ₁ ”, and “direction D _{2 in which} communication is difficult” is referred to as “null point D ₂ ”.

For example, in order for two wireless communication terminals 100 to perform efficient and stable communication, it is only necessary to secure a data transmission path on a straight line connecting the two devices in the shortest time. However, in the omnidirectional antenna, as described above, since transmission / reception power is distributed in all directions, power is consumed more than necessary in consideration of communication distance and communication quality. In directional antenna 20 thereto, since the receiving power is distributed in a specific direction, as compared with the non-directional, even taking into account the communication distance and communication quality, the direction D ₁ of the directional communication partner By adjusting so as to face, power consumption can be reduced.

Thus, the directional antenna 20, depending on the position of the communication partner, by controlling the direction D ₁ of the directional, wireless communication can be performed efficiently stably.

  In consideration of the above points, in this embodiment, the directivity of the antenna 20 is controlled by rotating the antenna 20 itself. Therefore, the rotation control value calculation unit 33 uses a predetermined calculation formula based on the position information of the own device 100a and the other device 100b and the direction of the own device 100a detected by the position / direction detection device 16 to An appropriate rotation direction and rotation angle of the antenna 20 are calculated so that wireless communication with the 100b can be performed efficiently and stably.

  The antenna rotation control unit 34 controls the antenna rotation driving device 17 based on the control values (rotation direction and rotation angle) calculated by the rotation control value calculation unit 33 to rotate the antenna 20.

  Each functional unit described above is realized by the control device 10 executing a program stored in the storage device 14 included in the wireless communication terminal 100.

<< Processing procedure >>
Subsequently, a wireless communication process of the wireless communication terminal 100 equipped with the above-described directivity control function will be described. FIG. 4 is a flowchart illustrating an example of a wireless communication processing procedure (part 1) according to the first embodiment of the present invention. FIG. 4 shows a process when the position / direction detection device 16 cannot detect the position information of the own apparatus 100a when the own apparatus 100a receives a communication request from the other apparatus 100b and starts communication. The procedure is shown.

  The wireless communication terminal 100 determines whether a communication request from the other device 100b has been received (step S101).

  While the communication request is not accepted in the determination in step S101 (step S101: NO), the process waits until the request is accepted.

  On the other hand, if it is determined in step S101 that the communication request has been received (step S101: YES), the own position calculation unit 32 cannot detect the position information of the own apparatus 100a by the position / direction detection device 16. Therefore, the position information transmission / reception unit 31 uses the position information of the other apparatus 100b received from at least three other apparatuses 100b and the distance between the own apparatus 100a and the other apparatus 100b. The position of the machine 100a is calculated (step S102).

  Subsequently, in order to share the position information with the other apparatus 100b, the wireless communication terminal 100 transmits the position information of the own apparatus 100a calculated in step S102 to the other apparatus 100b by the position information transmitting / receiving unit 31 (step S103). .

  Further, the wireless communication terminal 100 uses the rotation control value calculation unit 33 to set the antenna 20 based on the position information of the own device 100a and the other device 100b and the direction information of the own device 100a detected by the position / direction detection device 16. Control values (rotation direction and rotation angle) for rotation control are calculated (step S104).

  As a result, in the radio communication terminal 100, the antenna rotation control unit 34 rotates the antenna 20 based on the control value calculated in step S104 (step S105). That is, the directionality of the antenna 20 is controlled in step S105.

  Thereafter, when the wireless communication terminal 100 finishes the rotation control of the antenna 20, the wireless communication terminal 100 starts communication with the other device 100b that has accepted the communication request (step S106), and whether or not communication with the other device 100b has ended (communication). Whether or not a time-out has occurred is determined (step S107).

  If it is determined in step S107 that communication has not ended (no timeout has occurred during communication) (step S107: NO), the process proceeds to step S102 again to continue the processing.

  On the other hand, if it is determined in step S107 that the communication has ended (timeout during communication) (step S107: YES), the processing in FIG. 4 ends.

  In the wireless communication terminal 100, when the position information of the own device 100a can be detected by the position / direction detecting device 16, the position calculation processing of the own device 100a by the own device position calculation unit 32 performed in step S102 described above is performed. Instead, the subsequent processing procedure is executed using the detected position information.

  Further, in the wireless communication terminal 100, when the own device 100a makes a communication request to the other device 100b and starts communication, the communication request reception determination processing performed in step S101 described above is not performed, and the subsequent processing procedure is performed. Is executed.

(How to calculate the position of your aircraft)
Here, a method for calculating the position of own device 100a performed by own device position calculation unit 32 in step S102 described above will be described.

  The own device position calculation unit 32 calculates the following simultaneous equations based on the position information acquired from the other device 100b and the measured distance to the other device 100b, and calculates the position of the own device 100a (the coordinate value of the own device position). ) Is calculated.

  FIG. 5 is a diagram illustrating an example of the own position calculation method according to the first embodiment of the present invention. The position information of the other device 100b is received from at least three different wireless communication terminals 100 adjacent to the periphery of the own device 100a. FIG. 5 shows an example in which the received position information of the other device 100b is A (0, 0), B (1 + √3, 0), and C (1 + √3, 2). The distances from the position O (X, Y) of the own machine 100a to the positions A (0, 0), B (1 + √3, 0), C (1 + √3, 2) of the other machine 100b are respectively 2, √2, and √2.

At this time, the position O (X, Y) of own device 100a is obtained by calculating an equation consisting of the following equations (1) to (3).
2 = ((X-0) ² + (Y-0) ² ) ^1/2 (1)
√2 = ((X−1 + √3) ² + (Y−0) ² ) ^1/2 (2)
√2 = ((X−1 + √3) ² + (Y−2) ² ) ^1/2 (3)
As described above, the position of the aircraft 100a can be calculated based on the principle of triangulation.

  FIG. 6 is a flowchart illustrating an example of a processing procedure for own position calculation according to the first embodiment of the present invention. In FIG. 6, the processing procedure of the above-described step S102 performed by the own device position calculation unit 32 will be described more specifically.

  The own machine position calculation unit 32 makes the position information transmission / reception unit 31 make an information acquisition request to each of at least three other machines 100b, and the position information (the coordinates of other machine positions) held by each of the other machines 100b. Value) is acquired (step S201).

  Subsequently, in the own device position calculation unit 32, the distance measurement unit measures the distance from the own device 100a to each other device 100b that has received the position information in step S201 (step S202).

  The own device position calculation unit 32 substitutes the acquired coordinate value of the other device position and the measured distance value into a predetermined calculation formula (the above-described equations (1) to (3)), and A coordinate value is calculated (step S203).

  As described above, the own position calculation unit 32 executes the processing procedure of steps S201 to S203, and even when the position / direction detection device 16 cannot detect the position information of the own apparatus 100a, Calculate the position.

  In the above description, the distance measurement unit included in the own device position calculation unit 32 has described the method of measuring the distance between the own device 100a and the other device 100b using WiMedia (registered trademark). However, the present invention is not limited to this. For example, a measurement method based on the reception intensity may be used.

(Control value calculation method for rotating the antenna)
From here, the control value calculation method for rotating the antenna 20 which the rotation control value calculation part 33 performs in step S104 mentioned above is demonstrated.

  The rotation control value calculation unit 33 first detects the position information of the own apparatus 100a calculated by the own apparatus position calculation unit 32, the position information of the other apparatus 100b received by the position information transmission / reception unit 31, and the position / direction detection device 16 detects. Based on the direction of the own machine 100a, the following formula is calculated to calculate the rotation direction and the rotation angle as control values.

  FIG. 7 is a diagram illustrating an example of a rotation control value calculation method according to the first embodiment of the present invention. FIG. 7 shows an example of calculating the rotation control value of the antenna 20 included in the own device 100a in the own device 100a and the other device 100b.

  Among them, a coordinate value (X1, Y1) calculated by the own device position calculating unit 32 or representing the position of the own device 100a detected by the position / direction detecting device 16 is received by the position information transmitting / receiving unit 31. The coordinate value representing the position of the other machine 100b is (X2, Y2).

  In addition, the direction value of own device 100a detected by position / direction detection device 16 is assumed to be a counterclockwise (clockwise) angle (R1). That is, it is shown that the own device 100a rotates counterclockwise (clockwise) by an angle (R1).

At this time, the angle (R2) when viewing the other device 100b from the own device 100a is obtained by calculating the following equation (4).
R2 = arctan ((Y2-Y1) / (X2-X1)) (4)
For example, as shown in FIG. 1, the hardware configuration in which the position / direction detection device 16 is provided in the wireless communication terminal 100, that is, when the rotation of the antenna 20 and the direction detection of the own device 100a are not synchronized. Based on the angle (R2) obtained by calculating the equation (4) above and the angle (R1) of the own device 100a detected by the position / direction detection device 16 (in the case of asynchronous). Then, the rotation angle of the antenna 20 is calculated. More specifically, the difference value [R2-R1] obtained by subtracting the angle (R1) from the angle (R2) is the rotation angle that is the control value.

  Further, the rotation direction calculates (determines) the rotation direction of the antenna 20 based on the direction (counterclockwise) of the own device 100a detected by the position / direction detection device 16. More specifically, when the angle [R2−R1] is a positive value (when the angle R2> R1 is satisfied), the control value is a counterclockwise rotation direction, and vice versa. In such a case (when angle R2 <R1 holds), the control value is the clockwise rotation direction.

  On the other hand, when the position / direction detection device 16 is provided in the antenna 20, and the rotation of the antenna 20 and the direction detection of the own device 100a are synchronized, the position / direction detection device 16 is obtained by calculating the above equation (4). The rotation angle of the antenna 20 is set as the rotation angle of the antenna 20, and the rotation direction of the antenna 20 is the direction of the own device 100 a detected by the position / direction detection device 16 (counterclockwise).

  FIG. 8 is a flowchart showing a processing procedure example of rotation control value calculation according to the first embodiment of the present invention. In FIG. 8, the processing procedure of step S104 described above performed by the rotation control value calculation unit 33 will be described more specifically. 8A shows a control value calculation process when “rotation of antenna 20 and direction detection of own device 100a are not synchronized (when asynchronous)”, and FIG. 8B shows “rotation of antenna 20”. The control value calculation processing example of “when the direction detection of own device 100a is synchronized” is shown.

(If not synchronized)
As shown in FIG. 8A, the rotation control value calculation unit 33 acquires the rotation direction and rotation angle (direction value) of the own device 100a detected by the position / direction detection device 16 (step S301).

  Subsequently, the rotation control value calculation unit 33 is calculated by the own device position calculation unit 32 or the coordinate value indicating the position of the own device 100a detected by the position / direction detection device 16 and the position information transmission / reception unit 31. The received coordinate value representing the position of the other device 100b is substituted into a predetermined calculation formula (the above-described equation (4)), and an angle when the other device 100b is viewed from the own device 100a is calculated (step S302). ).

  Further, the rotation control value calculation unit 33 subtracts the rotation angle of the own device 100a acquired in step S301 from the angle calculated in step S302 (step S303), and ends the process of FIG.

(When synchronizing)
As shown in FIG. 8B, the rotation control value calculation unit 33 acquires the rotation direction and rotation angle (direction value) of the own device 100a detected by the position / direction detection device 16 (step S301).

  Subsequently, the rotation control value calculation unit 33 is calculated by the own device position calculation unit 32 or the coordinate value indicating the position of the own device 100a detected by the position / direction detection device 16 and the position information transmission / reception unit 31. The received coordinate value representing the position of the other device 100b is substituted into a predetermined calculation formula (the above-described equation (4)), and an angle when the other device 100b is viewed from the own device 100a is calculated (step S302). ), The process of FIG.

  In this way, rotation control value calculation unit 33 calculates the rotation direction and rotation angle of antenna 20 that are control values according to whether the rotation of antenna 20 and the direction detection of own device 100a are synchronized.

(Directivity control method by rotating the antenna)
From here, the directivity control method by the rotational drive of the antenna 20 which the antenna rotation control part 34 performs in step S105 mentioned above is demonstrated.

FIG. 9 is a diagram illustrating an example of the rotation operation of the antenna 20 according to the first embodiment of the present invention. The antenna rotation control unit 34 transmits a predetermined control signal to the antenna rotation driving device 17 based on the rotation direction and the rotation angle, which are the control values calculated by the rotation control value calculation unit 33 described above, so that FIG. The antenna 20 is rotated as shown. As a result, directional, i.e., the directivity of the direction D ₁ of the antenna 20 is in communication with another machine 100b as a communication partner, is adjusted to the optimum position.

  FIG. 10 is a diagram illustrating an example (part 1) of the communication environment after directivity control according to the first embodiment of the present invention. FIG. 10A shows transmission / reception power distribution curves 22a and 22b when both the own device 100a and the other device 100b include the directional antenna 20, and FIG. 10B shows the own device 100a. An example of the transmission / reception power distribution curve 22a when only the directional antenna 20 is provided is shown.

In FIG. 10A, transmission / reception power from the directional antenna 20 provided in each of the own device 100a and the other device 100b is distributed so as to face each other. As described above, when both the own device 100a and the other device 100b include the directional antenna 20, the directivity of the antenna 20 included in the own device 100a is determined by the rotation operation of the antenna 20 by the antenna rotation control unit 34. The direction D _1a of the antenna 20 and the direction D _1b of the directivity of the antenna 20 included in the other device 100b are adjusted so as to be positioned on a straight line connecting the own device 100a and the other device 100b in the shortest distance.

In FIG. 10B, the transmission / reception power from the directional antenna 20 included in the own device 100a is distributed so as to be directed toward the other device 100b. As described above, when only the own device 100 a includes the directional antenna 20, while the other device 100 b includes the omnidirectional antenna, the own device 100 a is rotated by the rotation operation of the antenna 20 by the antenna rotation control unit 34. directivity direction _{D 1a} of the antenna 20 provided in, for other machines 100b, it is adjusted so as to be located on the straight line connecting the own device 100a and the other apparatus 100b in the shortest.

  As described above, in the wireless communication terminal 100, the position information of the other device 100b acquired from the communication partner (another device 100b), the position information of the other device 100b, the own device 100a, and the other device 100b are obtained by the above-described directivity control function. The directivity of the antenna 20 included in the own device 100a is controlled on the basis of the position information of the own device 100a calculated from the distance between and the measured direction information of the own device 100a. At this time, the wireless communication terminal 100 rotates the antenna 20 according to control values (rotation direction and rotation angle) calculated based on the position information of the other device 100b, the position information of the own device 100a, and the direction information of the own device 100a. To control the direction of directivity.

As a result, it is possible to provide a user with a communication environment that enables efficient and stable communication even in wireless communication including communication between movable wireless communication terminals 100. That is, the own apparatus 100a and other apparatus 100b is, even while moving, the directivity of the direction D ₁ of the antenna 20 provided in each other, so as to be located on the straight line connecting the two aircraft in the shortest (directional since the adjustment of such direction D ₁ is face) automatically, it is possible to maintain the communication efficiency and communication quality at all times an optimum state.

  From here on, modifications according to the present embodiment will be described.

<< Modification 1: Directivity control function considering confidentiality improvement >>
In the first modification, the directivity of the antenna 20 is controlled so as to prevent unauthorized interception in communication between the wireless communication terminals 100 in consideration of the confidentiality of the communication environment (the directivity direction is controlled). It is a configuration.

<< Configuration >>
FIG. 11 is a diagram illustrating a configuration example (part 2) of the directivity control function according to the first embodiment of the present invention. As shown in FIG. 11, the difference between the present embodiment and the modification is that the antenna rotation control unit 34 rotates the antenna 20 based on the security information 41 stored and held in the storage device 14 included in the own device 100a. It is a point to make.

  The “security information” mentioned here is registered in advance with identification information for identifying the other device 100b that does not permit communication with the own device 100a in order to prevent communication from being intercepted in advance. For example, it is a MAC address (Media Access Control address) which is an ID number unique to the NIC.

  Based on such security information 41, the antenna rotation control unit 34 determines whether or not the other device 100b that is the communication partner is the wireless communication terminal 100 that is permitted to communicate with the own device 100a. In the case of the wireless communication terminal 100 that is not connected, the rotation is performed based on a value obtained by adding 90 ° to the rotation angle that is the control value calculated by the rotation control value calculation unit 33.

As described above, the directional antenna 20, it is present difficult null point D ₂ to perform communication.

Therefore, the antenna rotation control unit 34, the null point D _2, by adjusting the directivity of the antenna 20 to face the other machine 100b which is not communication permission, is intended to prevent unauthorized interception (Telecommunications Is difficult to receive).

Therefore, as described above, the antenna rotation control unit 34 adds 90 ° to the rotation angle, which is a control value for performing efficient and stable communication with the other device 100b, and adds a null point to the other device 100b. D as ₂ faces, to control the directivity orientation.

  The functional unit described above is realized by the control device 10 executing a program stored in the storage device 14 included in the wireless communication terminal 100, as in the case of the other functional units.

<< Processing procedure >>
Next, rotation control processing of the wireless communication terminal 100 equipped with the confidentiality function in the directivity control function described above will be described. FIG. 12 is a flowchart showing a processing procedure example of rotation control according to the first embodiment of the present invention. In FIG. 12, the processing procedure of step S105 described above performed by the antenna rotation control unit 34 will be described more specifically.

  As illustrated in FIG. 12, the antenna rotation control unit 34 refers to the security information 41 held in the storage device 14 based on the identification information acquired from the other device 100b that is the communication partner (step S401).

  As a result of referring to the security information 41, the antenna rotation control unit 34 determines whether or not the other device 100b is a target device that is not permitted to communicate with the own device 100a (step S402).

If it is determined in step S402 that the target device does not permit communication (step S402: YES), 90 ° is added to the rotation angle that is the control value calculated by the rotation control value calculation unit 33, null point D ₂ is corrected rotation angle to face the other machine 100b (step S403), the rotation angle of the corrected rotation control value calculation unit 33 rotates the antenna 20 based on the rotational direction calculated (step S404).

  On the other hand, if it is determined in step S402 that the target device is permitted to communicate (step S402: NO), the process proceeds to step 404, and the control value calculated by the rotation control value calculation unit 33 is set. Based on this, the antenna 20 is rotated.

(Directional control of antenna)
FIG. 13 is a diagram illustrating an example (part 2) of the communication environment after directivity control according to the first embodiment of the present invention. FIG. 13A shows transmission / reception power distribution curves 22a and 22b in the case where both own device 100a and other device 100b are equipped with directional antenna 20, and FIG. 13B shows own device 100a. An example of the transmission / reception power distribution curve 22a when only the directional antenna 20 is provided is shown.

In FIGS. 13A and 13B, the transmission / reception power from the directional antenna 20 included in the own device 100a is distributed so as not to go toward the other device 100b. Thus, even if both the own device 100a and the other device 100b include the directional antenna 20, only the own device 100a includes the directional antenna 20, while the other device 100b includes the omnidirectional antenna. even if provided with a by rotation of the antenna 20 by the antenna rotation control unit 34, the null point _{D 2a} of the antenna 20 of the own device 100a is provided in, for other machines 100b, own apparatus 100a and other equipment It is adjusted so as to be positioned on a straight line connecting 100b with the shortest distance.

As described above, in the wireless communication terminal 100, when the antenna 20 is rotated and the directivity is controlled by the directivity control function described above, the communication partner (other device) is set based on the security information 41 set in advance. 100b) determines whether or not communication with the own device 100a is not permitted, and if the other device 100b is not permitted, the antenna 20 included in the own device 100a. null point D ₂ is to be directed to another machine 100b, and controls the directivity of orientation.

  As a result, even in wireless communication including communication between the movable wireless communication terminals 100, it is possible to provide a user with a communication environment capable of performing efficient and stable communication. By controlling the wireless communication terminal 100 that is not allowed to be illegally intercepted (so that it is difficult to receive radio waves), confidentiality can be improved.

<< Modification 2: Directivity control function considering low power consumption >>
Subsequently, the second modification is a configuration in which the power supply unit of the communication device 13 is controlled so that power consumption in communication between the wireless communication terminals 100 is reduced in consideration of lower power consumption of the communication environment. .

<< Configuration >>
FIG. 14 is a diagram illustrating a configuration example (No. 3) of the directivity control function according to the first embodiment of the present invention. As shown in FIG. 14, the difference between the present embodiment and the modification is that a power supply unit 13 p included in the communication device 13 is newly provided so that the power supplied to the communication device 13 during communication is reduced by a predetermined amount. It has the point which has the electric power control part 35 which instruct | indicates control of supplied electric power.

  Since the transmission / reception power distribution is limited to a specific direction, the directional antenna 20 is less than omnidirectional by matching the directionality of the radio communication terminals 100 (controlling the directivity). Efficient and stable communication can be performed with the supplied power.

  Because of such characteristics, when the antenna rotation control unit 34 finishes the directivity control by the rotation of the antenna 20, the antenna rotation control unit 34 notifies the power control unit 35 to that effect and instructs power supply control (transmission power control) during communication. . As a result, the power control unit 35 instructs the power supply unit 13p of the communication device 13 to operate so as to supply a smaller amount of supply power (for example, supply less power than the supply power at the time of reception).

  The functional unit described above is realized by the control device 10 executing a program stored in the storage device 14 included in the wireless communication terminal 100, as in the case of the other functional units.

<< Processing procedure >>
Next, the wireless communication process of the wireless communication terminal 100 equipped with the power saving function in the directivity control function described above will be described. FIG. 15 is a flowchart illustrating a wireless communication processing procedure example (2) according to the first embodiment of the present invention.

  The wireless communication terminal 100 determines whether a communication request from the other device 100b has been received (step S501).

  While the communication request is not accepted in the determination in step S501 (step S501: NO), the process waits until the request is accepted.

  On the other hand, if it is determined in step S501 that the communication request has been received (step S501: YES), the own position calculation unit 32 cannot detect the position information of the own apparatus 100a by the position / direction detection device 16. Therefore, the position information transmission / reception unit 31 uses the position information of the other apparatus 100b received from at least three other apparatuses 100b and the distance between the own apparatus 100a and the other apparatus 100b. The position of the machine 100a is calculated (step S502).

  Subsequently, in order to share the position information with the other apparatus 100b, the wireless communication terminal 100 transmits the position information of the own apparatus 100a calculated in step S502 to the other apparatus 100b by the position information transmitting / receiving unit 31 (step S503). .

  Further, the wireless communication terminal 100 uses the rotation control value calculation unit 33 to set the antenna 20 based on the position information of the own device 100a and the other device 100b and the direction information of the own device 100a detected by the position / direction detection device 16. A control value (rotation direction and rotation angle) for controlling the rotation is calculated (step S504).

  As a result, in the wireless communication terminal 100, the antenna rotation control unit 34 rotates the antenna 20 based on the control value calculated in step S504 (step S505). That is, the directivity direction of the antenna 20 is controlled by the step S505.

  Thereafter, when the wireless communication terminal 100 finishes the rotation control of the antenna 20, the antenna rotation control unit 34 instructs the power control unit 35 to control power supply to the communication device 13, and the power control unit 35 follows the instruction. The power supply unit 13p is instructed to operate so that the power supplied during transmission is less than the power supplied during reception by a predetermined amount, and communication with the other device 100b is started (step S506).

  The wireless communication terminal 100 determines whether or not the communication with the other device 100b has ended (whether or not a timeout has occurred during communication) (step S507).

  If it is determined in step S507 that communication has not ended (no timeout has occurred during communication) (step S507: NO), the process proceeds to step S502 again to continue the processing.

  On the other hand, if it is determined in step S107 that the communication has ended (timeout during communication) (step S507: YES), the processing in FIG. 15 ends.

  As described above, in the wireless communication terminal 100, the directivity of the antenna 20 included in the own device 100a is controlled by the directivity control function described above, and communication with the other device 100b that is the communication partner is performed in synchronization with this control operation. When starting communication, a predetermined amount of transmission power is supplied to the communication device 13 to perform communication.

  As a result, even in wireless communication including communication between the movable wireless communication terminals 100, it is possible to provide a user with a communication environment capable of performing efficient and stable communication. The power consumption can be reduced by controlling the power supply at the time to be reduced by a predetermined amount.

<Summary>
As described above, according to the first embodiment of the present invention, the wireless communication terminal 100 according to this embodiment includes the position information of the other device 100b, the position information of the own device 100a, and the direction information of the own device 100a. Based on the above, the directivity of the antenna 20 included in the own device 100a is controlled. At this time, the radio communication terminal 100 controls the direction of directivity by rotating the antenna 20 according to the control values (rotation direction and rotation angle) calculated based on the above information.

Further, when the radio communication terminal 100 controls the directivity, the other device 100b is a target device that is not permitted to communicate with the own device 100a based on the security information 41 set in advance. If it is determined, null point D ₂ of the antenna 20 so as to face to the other machine 100b, and controls the directivity.

  Furthermore, when the wireless communication terminal 100 starts communication with the other device 100b in synchronization with the directivity control, the wireless communication terminal 100 performs communication by supplying a predetermined amount of power to the communication device 13.

  As a result, the wireless communication terminal 100 can provide the user with a communication environment that enables efficient and stable communication even in wireless communication including communication between the movable wireless communication terminals 100. Furthermore, in the communication environment, confidentiality can be improved and power consumption can be reduced.

[Second Embodiment]
In the first embodiment, the configuration of the directivity control function that performs control by rotating the antenna itself in order to control the directivity of the antenna (control the direction of directivity) has been described.

  However, in this configuration, if the wireless communication terminal performs one-to-one communication, it is possible to perform directivity control by rotating the antenna, but for example, one such as an access point (AP) or the like. In an environment in which communication with N is performed, it is necessary to perform directivity control for a plurality of communication partners, and there is a limit to control by rotating an antenna. That is, in the configuration in which the antenna is rotated, the reaction speed when the radio communication terminals 100 match the direction of directivity is slow, and efficient and stable communication cannot be performed.

  Therefore, in this embodiment, an antenna is used by using a wireless communication technology (hereinafter referred to as MIMO (Multiple Input Multiple Output)) that is applied to a wireless LAN or the like and expands a data transmission / reception band by combining a plurality of antennas. It has a directivity control function that electronically performs directivity control rather than physically rotating to perform directivity control, and solves the above-described problems.

(MIMO)
In normal wireless LAN communication, there is a limit of 54 (Mbps) on the radio using IEEE802.11a / 802.11g in the 5.2 (GHz) band in the frequency that can be used per user. Different antennas transmit different data at the same time and combine them at the time of reception to realize a pseudo broadband and speed up communication. Theoretically, the same effect can be obtained as when the bandwidth is increased by two times when there are two antennas and by three times when there are three antennas.

  In a wireless LAN, the frequency that can be used is limited, and it is difficult to increase the speed and reach by expanding the frequency band that can be used per user. For this reason, there is an expectation for MIMO technology that increases the frequency band by using a plurality of antennas in a limited space by increasing the number of access points. In addition, since radio waves reach from a plurality of antennas through a plurality of paths, transmission and reception in an environment where there are many obstacles is stabilized, and an effect of greatly improving the communication state can be obtained.

  In addition to IEEE 802.11n, which is a wireless LAN standard that realizes a maximum of 500 Mbps, which is currently being formulated, MIMO is already considered to be widely adopted, and IEEE 802.11g is already up to 108 times, which is twice as high as usual with MIMO technology. Products that can achieve communication performance of Mbps) have also appeared.

  The wireless communication terminal according to the present embodiment will be described below, but the difference between the present embodiment and the first embodiment is only the directivity control function using the MIMO. For technical matters, the same drawings and reference numerals as those in the first embodiment are referred to, and a description thereof is omitted.

<Hardware configuration>
Now, the hardware configuration of the wireless communication terminal according to the present embodiment will be described. FIG. 16 is a diagram illustrating a hardware configuration example of the wireless communication terminal 100 according to the second embodiment of the present invention. As shown in FIG. 16, the difference between the first embodiment and the present embodiment is that a multi-antenna communication device 19 including a plurality of antennas ₂₀₁ to _n is provided.

Here, a hardware configuration of the multi-antenna communication apparatus 19 will be briefly described. FIG. 17 is a diagram illustrating a hardware configuration example of the multi-antenna communication apparatus 19 according to the second embodiment of the present invention. As shown in FIG. 17, the multi-antenna communication device 19 includes an antenna array unit 51 including a plurality of antennas ₂₀₁ to _n , and a phase / amplitude control unit that controls the phase / amplitude of each antenna 20 using a phase / amplitude control signal. 52, and a transmission / reception unit 53 that transmits and receives signals via the phase / amplitude control unit 52. The phase / amplitude control unit 52 controls the phase / amplitude of the radio wave, and the antenna array unit 51 To form a directivity (electronically controlled directional beam).

  In such a multi-antenna communication apparatus 19, the transmission bit rate is improved without expanding the required spectrum, as compared with the signal transmission by the communication apparatus 13 having one transmission / reception antenna 20 described in the first embodiment. And high quality reception can be realized.

<Directivity control function>
The wireless communication terminal 100 according to the present embodiment has a directivity control function for controlling the directivity of the antenna 20 of the own device 100a with respect to a communication partner (another device 100b), and as in the first embodiment, Even in a wireless communication environment including communication between wireless communication terminals 100 that move with each other and one-to-N communication such as an access point (AP), stable and efficient communication is performed.

  Now, the configuration and operation of the directivity control function will be described.

<< Configuration >>
FIG. 18 is a diagram illustrating a configuration example (part 1) of the directivity control function according to the second embodiment of the present invention. As shown in FIG. 18, the difference between the first embodiment and this embodiment is that directivity is formed by the antenna array unit 51 instead of the rotation control value calculation unit 33, that is, the directivity by each of the antennas ₂₀₁ to _n . Based on the control value calculated by the directivity control value calculation unit 36 instead of the directivity control value calculation unit 36 for calculating the control value (phase / amplitude control signal) for controlling the directivity and the antenna rotation control unit 34, the multi-antenna It is a point which has the directivity control part 37 which instruct _| indicates operation _| movement so that the directivity by each antenna _201-n may be controlled with respect to the phase / amplitude control part 52 with which the communication apparatus 19 is provided.

  The directivity control value calculation unit 36 calculates a phase / amplitude control signal based on the position information of the other device 100b, the position information of the own device 100a, and the direction information, and the directivity control unit 37 calculates the calculated phase.・ Sends amplitude control signal. As a result, the antenna array unit 51 of the multi-antenna communication apparatus 19 has a transmission / reception power distribution as shown in FIG.

(Multi antenna directivity)
FIG. 19 is a diagram illustrating an example in which constant transmission / reception power from the antenna array unit 51 according to the second embodiment of the present invention is plotted. FIG. 19 shows a plot example of transmission / reception power (transmission / reception power distribution curve 22 shown in FIG. 19) of the multi-antenna communication apparatus 19 in which the antenna array unit 51 is composed of _four antennas ₂₀₁ to ₄ .

  Such distribution of transmitted / received power is changed according to the phase / amplitude control signal. That is, the antenna array unit 51 can form the directivity of a plurality of patterns according to the phase / amplitude control signal.

  Therefore, the directivity control calculation unit 36 forms a plurality of directivities such that the directivity directions coincide with each direction obtained by dividing 360 ° by N and dividing it into N pieces at predetermined angles, for example. In the communication with the other device 100b, the phase / amplitude control signal is held and the N-direction divided from the N directions based on the position information of the other device 100b, the position information of the own device 100a, and the direction information. Identify the appropriate direction in which good communication can be performed, and determine the phase / amplitude control signal that forms the directivity that matches the specified direction from among the plurality of held phase / amplitude control signals. .

  The functional unit described above is realized by the control device 10 executing a program stored in the storage device 14 included in the wireless communication terminal 100, as in the case of the other functional units.

<< Processing procedure >>
Subsequently, a wireless communication process of the wireless communication terminal 100 equipped with the above-described directivity control function will be described. FIG. 20 is a flowchart showing an example of a wireless communication processing procedure (part 1) according to the second embodiment of the present invention.

  The wireless communication terminal 100 determines whether a communication request from the other device 100b has been received (step S601).

  While the communication request is not accepted in the determination in step S601 (step S601: NO), the process waits until the request is accepted.

  On the other hand, if it is determined in step S601 that the communication request has been received (step S601: YES), the own position calculation unit 32 cannot detect the position information of the own apparatus 100a by the position / direction detection device 16. Therefore, the position information transmission / reception unit 31 uses the position information of the other apparatus 100b received from at least three other apparatuses 100b and the distance between the own apparatus 100a and the other apparatus 100b. The position of the machine 100a is calculated (step S602).

  Subsequently, in order to share the position information with the other apparatus 100b, the wireless communication terminal 100 transmits the position information of the own apparatus 100a calculated in step S602 to the other apparatus 100b by the position information transmitting / receiving unit 31 (step S603). .

Furthermore, the radio communication terminal 100 uses the antenna array based on the position information of the own device 100 a and the other device 100 b and the direction information of the own device 100 a detected by the position / direction detection device 16. A control value for controlling the directivity by each of the antennas ₂₀₁ to _n of the unit 51 is calculated (a phase / amplitude control signal is determined) (step S604).

As a result, the radio communication terminal 100 forms directivity based on the control value (phase / amplitude control signal) calculated (determined) by the directivity control unit 37 in step S604 (step S605). That is, in step S605, the directionality of each antenna _201-n is controlled.

Thereafter, when the radio communication terminal 100 finishes the directivity control of each of the antennas _{201 to n} , the wireless communication terminal 100 starts communication with the other device 100b that has accepted the communication request (step S606), and communication with the other device 100b is completed. Whether or not (time out during communication) is determined (step S607).

  If it is determined in step S607 that communication has not ended (no timeout has occurred during communication) (step S607: NO), the process proceeds to step S602 again to continue the processing.

  On the other hand, if it is determined in step S607 that the communication has ended (timeout during communication) (step S607: YES), the processing in FIG. 20 ends.

(Directional control of multi-antenna)
From here, the directivity control method of each antenna _{201-n which} the directivity control part 37 performs in step S605 mentioned above is demonstrated.

  FIG. 21 is a diagram illustrating an example (part 1) of the communication environment after directivity control according to the second embodiment of the present invention. FIG. 21A shows transmission / reception power distribution curves 22a and 22b in the case where both own device 100a and other device 100b include directional antenna 20, and FIG. 21B shows own device 100a. An example of the transmission / reception power distribution curve 22a when only the directional antenna 20 is provided is shown.

In FIG. 21A, transmission / reception power from the antenna array unit 51 provided in each of the own device 100a and the other device 100b is distributed so as to face each other. As described above, when both the own device 100a and the other device 100b include the antenna array unit 51, the own device 100a is controlled by the directivity control operation of the antennas _{201 to n} by the directivity control unit 37. Directivity direction D _1a of antenna array unit 51 provided and directivity direction D _{1b of} antenna array unit 51 provided in other device 100b are located on a straight line that connects own device 100a and other device 100b in the shortest distance. To be adjusted.

In FIG. 21B, the transmission / reception power from the antenna array unit 51 included in the own device 100a is distributed so as to be directed toward the other device 100b. As described above, when only the own device 100 a includes the antenna array unit 51, while the other device 100 b includes the omnidirectional antenna, the directivity control operation of each antenna _{201 to n} by the directivity control unit 37. Accordingly, the directivity of the direction _{D 1a} of the antenna array 51 own device 100a is provided in, for other machines 100b, it is adjusted so as to be located on the straight line connecting the own device 100a and the other apparatus 100b in the shortest.

  As described above, in the wireless communication terminal 100, the position information of the other device 100b acquired from the communication partner (another device 100b), the position information of the other device 100b, the own device 100a, and the other device 100b are obtained by the above-described directivity control function. The directivity of the antenna array unit 51 included in the own device 100a is controlled based on the position information of the own device 100a calculated from the distance between the antenna device 100 and the measured direction information of the own device 100a. At this time, the wireless communication terminal 100 is predetermined according to the control value (phase / amplitude control signal) calculated (determined) based on the position information of the other device 100b, the position information of the own device 100a, and the direction information of the own device 100a. The direction of directivity is controlled by forming directivity in the direction of.

As a result, an effect similar to that of the first embodiment (effective and stable communication is performed even in wireless communication including communication between movable wireless communication terminals 100) can be achieved. That is, the own apparatus 100a and other apparatus 100b is, even while moving, the directivity of the direction D ₁ of the antenna 20 provided in each other, so as to be located on the straight line connecting the two aircraft in the shortest (directional since the adjustment of such direction D ₁ is face) automatically, it is possible to maintain the communication efficiency and communication quality at all times an optimum state.

  From here on, modifications according to the present embodiment will be described.

<< Modification 1: Directivity control function considering confidentiality improvement >>
The modification described here is the same as the modification 1 described in the first embodiment. That is, in consideration of the confidentiality of the communication environment, the directivity of the antenna array unit 51 is controlled (directivity direction is controlled) so as to prevent unauthorized communication interception in communication between the wireless communication terminals 100. .

<< Configuration >>
FIG. 22 is a diagram illustrating a configuration example (part 2) of the directivity control function according to the second embodiment of the present invention. As illustrated in FIG. 22, the directivity control value calculation unit 36 determines whether or not the other device 100b that is the communication partner is the wireless communication terminal 100 that is permitted to communicate with the own device 100a based on the security information 41. determines, in the case of the radio communication terminal 100 that communication is not permitted, calculating the phase and amplitude control signals, such as oriented is null point D ₂ in another machine 100b (determination) to.

Thus, directivity control unit 37, based on the phase and amplitude control signals directivity control value calculating unit 36 is calculated (determined) to form a directivity, the null point D _2, not allowed other machine 100b By adjusting the directivity of the antenna array unit 51 so as to face the radio, unauthorized communication interception is prevented (to make it difficult to receive radio waves).

  The functional unit described above is realized by the control device 10 executing a program stored in the storage device 14 included in the wireless communication terminal 100, as in the case of the other functional units.

(Directional control of multi-antenna)
FIG. 23 is a diagram illustrating an example (part 2) of the communication environment after the directivity control according to the second embodiment of the present invention. FIG. 23A shows transmission / reception power distribution curves 22a and 22b in the case where both own device 100a and other device 100b include antenna array unit 51, and FIG. 23B shows own device 100a. Only the transmission / reception power distribution curve 22a in the case where only the antenna array unit 51 is provided is shown.

In FIGS. 23A and 23B, the transmission / reception power from the antenna array unit 51 included in the own device 100a is distributed so as not to go to the other device 100b. Thus, even when both of own device 100a and other device 100b include antenna array unit 51, only own device 100a includes antenna array unit 51, while other device 100b includes an omnidirectional antenna. even if provided with a by directivity control operation of the antenna array part 51 by the directivity control unit 37, the null point D _2a of the antenna array 51 own device 100a is provided in, for other machines 100b, It is adjusted so that it is located on the straight line connecting own device 100a and other device 100b in the shortest.

As described above, in the wireless communication terminal 100, when the directivity of the antenna array unit 51 is controlled by the above-described directivity control function, the communication partner (the other device 100b) is based on the security information 41 set in advance. ) Is a target device that is not permitted to communicate with the own device 100a, and if the other device 100b is a target device that is not permitted to communicate, the antenna provided in the own device 100a. null point D ₂ of the array section 51 so as to face to the other machine 100b, and controls the directivity orientation.

  As a result, even in wireless communication including communication between movable wireless communication terminals 100, in a communication environment where efficient and stable communication can be performed, it is illegal for wireless communication terminals 100 that are not permitted to communicate. It is possible to improve confidentiality by controlling so that communication is not intercepted by the device (so as to make it difficult to receive radio waves).

<< Modification 2: Directivity control function by access point >>
The modification described here is a configuration in which directivity control is efficiently and stably performed for a plurality of communication partners in an environment where one-to-N communication such as an access point (AP) is performed. That is, in the directivity control function shown in the modified example 2, the directivity control by time division is performed to establish communication with a plurality of communication partners.

(Directional control by time division)
FIG. 24 is a diagram illustrating an operation example of directivity control by time division according to the second embodiment of the present invention. In FIG. 24, in a communication environment including a wireless communication terminal (A) 100a, a wireless communication terminal (B) 100b, and an access point (AP) 100ap that these terminals access in common, An operation example is shown in which devices exchange communication data over time.

  When the access point (AP) 100ap receives a communication request from both the wireless communication terminal (A) 100a and the wireless communication terminal (B) 100b, the access point (AP) 100ap is connected to the wireless communication terminal (A) 100a at the received timing (time T1). The access point (AP) 100ap starts exchanging communication data.

  The wireless communication terminal (B) 100b and the access point (AP) 100ap are at the timing (time T2) at which the communication frame data is exchanged between the wireless communication terminal (A) 100a and the access point (AP) 100ap. Start exchanging communication data.

  Further, at the timing (time T3) when data for a communication frame is exchanged between the wireless communication terminal (B) 100b and the access point (AP) 100ap, the wireless communication terminal (A) 100a and the access point (AP) again. ) 100ap starts exchanging communication data.

  In this way, the access point (AP) 100ap switches the communication partner at the timing when data for the communication frame is exchanged when performing 1-to-N communication.

  For this reason, in the access point (AP) 100ap, the directivity control value calculation unit 36 calculates (determines) a phase / amplitude control signal that forms a directivity corresponding to each communication partner for each communication frame, and the antenna array. The directivity control of the unit 51 is time-division processed. Note that the timing of switching the communication partner described above may not be in units of one frame but may be a certain number of frames, that is, a predetermined number of frames.

<< Processing procedure >>
Next, a wireless communication process of the access point (AP) 100ap equipped with the directivity control function described above will be described. FIG. 25 is a flowchart illustrating a wireless communication processing procedure example (2) according to the second embodiment of the present invention. FIG. 25 illustrates an example of a processing procedure for switching communication partners when communication data for one frame is exchanged between the access point (AP) 100ap and the wireless communication terminal 100.

  The access point (AP) 100ap determines whether or not a communication request from the wireless communication terminal 100 has been received (step S701).

  While the communication request is not accepted in the determination in step S701 (step S701: NO), the process waits until the request is accepted.

  On the other hand, if it is determined in step S701 that a communication request has been received (step S701: YES), the own position calculation unit 32 cannot detect the position information of the own apparatus 100a by the position / direction detection device 16. Accordingly, the position information transmitting / receiving unit 31 receives the position information of the wireless communication terminals 100 received from at least three wireless communication terminals 100, and between the access point (AP) 100ap and the wireless communication terminal 100. Based on the distance, the position of the access point (AP) 100ap is calculated (step S702).

  Subsequently, the access point (AP) 100ap shares the position information of the access point (AP) 100ap calculated in step S702 by the position information transmitting / receiving unit 31 in order to share the position information with the wireless communication terminal 100. (Step S703).

Further, the access point (AP) 100ap is determined by the directivity control value calculation unit 36, the position information of the access point (AP) 100ap and the wireless communication terminal 100, and the access point (AP) 100ap detected by the position / direction detection device 16. The control value for controlling the directivity of each antenna ₂₀₁ to _n of the antenna array unit 51 is calculated (the phase / amplitude control signal is determined) based on the direction information (step S704).

As a result, the access point (AP) 100ap forms directivity based on the control value (phase / amplitude control signal) calculated (determined) by the directivity control unit 37 in step S704 (step S705). That is, in step S705, the directionality of each antenna _201-n is controlled.

Thereafter, when the access point (AP) 100ap finishes the directivity control of each of the antennas 201 to _n , the access point (AP) 100ap starts communication with the wireless communication terminal 100 that has accepted the communication request (step S706).

  After the start of communication, the access point (AP) 100ap determines whether or not one frame of communication data has been exchanged with the wireless communication terminal 100 that is currently performing communication (step S707).

  If it is determined in step S707 that one frame of communication data has been exchanged (step S707: YES), the communication partner (other wireless communication terminal 100) is switched (step S709), and the process proceeds to step S702. Process.

  On the other hand, if it is determined in step S707 that one frame of communication data has not been exchanged (step S707: NO), has communication with all the wireless communication terminals 100 requested for communication completed? It is determined whether or not (step S708).

  If it is determined in step S708 that the communication has not ended (step S708: NO), the process proceeds to step S702 and processing is performed.

  On the other hand, if it is determined in step S708 that the communication has ended (step S708: YES), the processing in FIG. 25 ends.

(Directional control of multi-antenna)
From here, the directivity control method by the time division of each antenna _201-n which the directivity control part 37 performs in step S705 mentioned above is demonstrated. FIG. 26 is a diagram illustrating an example of a communication environment after directivity control by time division according to the second embodiment of the present invention. 26 shows transmission / reception power distribution curves 22ap and 22a when the access point 100ap communicates with the wireless communication terminal (A) 100a, and transmission / reception when the access point 100ap communicates with the wireless communication terminal (B) 100b. Examples of power distribution curves 22ap and 22b are shown.

  In FIG. 26, the transmission / reception power from the antenna array unit 51 included in the access point 100ap is distributed so as to go to either the wireless communication terminal (A) 100a or the wireless communication terminal (B) 100b that is the communication partner. ing.

First, when a predetermined number of frames of communication data are exchanged between the access point 100ap and the wireless communication terminal (A) 100a, the directivity control operation of the antennas _{201 to n} by the directivity control unit 37 The directivity direction D _1ap of the antenna array unit 51 provided in the access point 100ap and the directivity direction D _1a of the antenna array unit 51 provided in the wireless communication terminal (A) 100a are determined by the access point 100ap and the wireless communication terminal (A ) It is adjusted so as to be positioned on a straight line connecting 100a with the shortest distance.

Next, when communication data is exchanged for a predetermined number of frames between the access point 100ap and the wireless communication terminal (A) 100a, the communication partner is communicated from the wireless communication terminal (A) 100a to the wireless communication terminal (B) 100b. Are switched, and the directivity control operation of the antennas 201 to _n by the directivity control unit 37 causes the directivity direction D1ap of the antenna array unit 51 included in the access point 100ap and the antenna _included in the wireless communication terminal (B) 100a. and directivity direction _{D 1b} of the array portion 51 is adjusted so as to be located on the straight line connecting the access point 100ap and the radio communication terminal (B) 100b in the shortest.

  As described above, in the access point (AP) 100ap, the communication partner is switched by time division and the directivity of the antenna array unit 51 is controlled by the above-described directivity control function.

  As a result, even in a one-to-N communication environment, a plurality of wireless communication terminals 100 can perform efficient and stable communication.

<Summary>
As described above, according to the second embodiment of the present invention, the wireless communication terminal 100 according to this embodiment includes the position information of the other device 100b, the position information of the own device 100a, and the direction information of the own device 100a. Based on the above, the directivity of the antenna array unit 51 included in the own device 100a is controlled. At this time, radio communication terminal 100 forms directivity in a predetermined direction according to a control value (phase / amplitude control signal) calculated (determined) based on the above information, and controls the direction of directivity.

Further, when the radio communication terminal 100 controls the directivity, the other device 100b is a target device that is not permitted to communicate with the own device 100a based on the security information 41 set in advance. If it is determined, null point D ₂ of the antenna array unit 51 so as to face to the other machine 100b, and controls the directivity orientation.

  Further, when the radio communication terminal 100 controls the directivity and communicates with a plurality of radio communication terminals 100 (when communication requests are received from the plurality of radio communication terminals 100), the radio communication terminal 100 selects a communication partner by time division. Switching, the directivity of the antenna array unit 51 is controlled.

  As a result, the wireless communication terminal 100 has the same effects as those of the first embodiment, and a plurality of wireless communication terminals 100 can perform efficient and stable communication even in a one-to-N communication environment. .

  So far, the present invention has been described based on each of the above embodiments, but the “directivity control function” of the wireless communication terminal 100 according to each of the above embodiments is the processing procedure described with reference to the drawings. Can be implemented by a computer as a program coded in a programming language suitable for the operating environment (platform) of the control device 10. Therefore, the program according to each of the above embodiments can be stored in the computer-readable recording medium 15a.

  Therefore, the program according to each of the above embodiments can be read from the recording medium 15a by being stored in the recording medium 15a such as a floppy (registered trademark) disk, a CD (Compact Disc), and a DVD (Digital Versatile Disk). The program can be installed in the wireless communication terminal 100 by reading the recorded program set in the recording media drive device 15. In addition, since the wireless communication terminal 100 includes the communication devices 13 and 19 that can be connected to a data transmission path such as a network, the program can be downloaded and installed using an electric communication line such as the Internet.

  Moreover, although each said embodiment demonstrated the structure which transmits and receives each other's positional information and shares information in the some radio | wireless communication terminal 100, this invention is not limited to this structure. For example, in the case of a desktop PC (information processing apparatus) provided with the wireless communication devices 13 and 19 or an OA device such as a copy machine, the location information is held in advance because it is fixedly arranged. It may be.

  Finally, the present invention is not limited to the requirements shown here, such as combinations of other elements with the shapes and configurations described in the above embodiments. With respect to these points, the present invention can be changed within a range that does not detract from the gist of the present invention, and can be appropriately determined according to the application form.

It is a figure which shows the hardware structural example of the radio | wireless communication terminal which concerns on the 1st Embodiment of this invention. It is a figure which shows the structural example (the 1) of the directivity control function which concerns on the 1st Embodiment of this invention. It is a figure which shows the example which plotted the constant transmission / reception power from the antenna which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the process sequence example (the 1) of the radio | wireless communication which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the own-machine position calculation method which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the example of a process sequence of the own-machine position calculation which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the rotation control value calculation method which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the example of a process sequence of rotation control value calculation which concerns on the 1st Embodiment of this invention. It is a figure which shows the example of rotation operation | movement of the antenna which concerns on the 1st Embodiment of this invention. It is a figure which shows the example (the 1) of the communication environment after the directivity control which concerns on the 1st Embodiment of this invention. It is a figure which shows the structural example (the 2) of the directivity control function which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the process sequence example of the rotation control which concerns on the 1st Embodiment of this invention. It is a figure which shows the example (the 2) of the communication environment after the directivity control which concerns on the 1st Embodiment of this invention. It is a figure which shows the structural example (the 3) of the directivity control function which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the process sequence example (the 2) of the radio | wireless communication which concerns on the 1st Embodiment of this invention. It is a figure which shows the hardware structural example of the radio | wireless communication terminal which concerns on the 2nd Embodiment of this invention. It is a figure which shows the hardware structural example of the multi-antenna communication apparatus which concerns on the 2nd Embodiment of this invention. It is a figure which shows the structural example (the 1) of the directivity control function which concerns on the 2nd Embodiment of this invention. It is a figure which shows the example which plotted the constant transmission / reception power from the antenna array part which concerns on the 2nd Embodiment of this invention. It is a flowchart which shows the process sequence example (the 1) of the radio | wireless communication which concerns on the 2nd Embodiment of this invention. It is a figure which shows the example (the 1) of the communication environment after the directivity control which concerns on the 2nd Embodiment of this invention. It is a figure which shows the structural example (the 2) of the directivity control function which concerns on the 2nd Embodiment of this invention. It is a figure which shows the example (the 2) of the communication environment after the directivity control which concerns on the 2nd Embodiment of this invention. It is a figure which shows the operation example of the directivity control by the time division based on the 2nd Embodiment of this invention. It is a flowchart which shows the process sequence example (the 2) of the radio | wireless communication which concerns on the 2nd Embodiment of this invention. It is a figure which shows the example of the communication environment after the directivity control by the time division which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

10 Control Device 11 Input Device 12 Output Device 13 Communication Device 14 Storage Device 15 Recording Media Drive Device 16 Position / Direction Detection Device 17 Antenna Rotation Drive Device 18 External Device I / F
19 Multi-antenna communication device 20 Antenna 21 Transmission / reception power distribution curve (in the case of omnidirectionality)
22 Transmission / reception power distribution curve (in the case of directivity)
31 Position information transmission / reception unit 32 Own position calculation unit 33 Rotation control value calculation unit 34 Antenna rotation control unit 35 Transmission output control unit 36 Directivity control value calculation unit 37 Directivity control unit 41 Security information 51 Antenna array 52 Phase / amplitude control Unit 53 Transmission / Reception Unit 100 Wireless Communication Terminal 200 External Device (Information Processing Device, etc.)

Claims (16)

A wireless communication terminal having an antenna that forms directivity,
Based on other device position information indicating the position of another wireless communication terminal, own device position information indicating the position of the wireless communication terminal, and own device direction information indicating the direction of the wireless communication terminal, the direction of the directivity A wireless communication terminal comprising directivity control means for controlling the communication. The wireless communication terminal
A rotation driving means for rotating the antenna;
The directivity control means includes
2. The wireless communication terminal according to claim 1, wherein the antenna is rotated by the rotation driving means to control the direction of directivity. The wireless communication terminal
Based on the position information of the other device, the position information of the own device, and the direction information of the own device, a first calculating means for calculating a control value for rotationally driving the antenna;
The rotation driving means includes
The wireless communication terminal according to claim 2, wherein the antenna is rotationally driven based on the control value calculated by the first calculation means. The first calculation means includes
The wireless communication terminal according to claim 3, wherein a rotation direction and a rotation angle of the antenna are calculated as control values for rotationally driving the antenna. The wireless communication terminal
With a multi-antenna composed of a plurality of antennas, having directivity forming means for forming the directivity of a plurality of patterns,
The directivity control means includes
The wireless communication terminal according to claim 1, wherein when the directivity is formed by the directivity forming means, the direction of directivity to be formed is controlled. The wireless communication terminal
Second calculation means for calculating a control value for the multi-antenna to form directivity based on the other apparatus position information, the own apparatus position information, and the own apparatus direction information;
The directivity forming means includes:
6. The wireless communication terminal according to claim 5, wherein the directivity is formed based on a control value calculated by the second calculating means. The second calculation means includes:
The radio communication terminal according to claim 6, wherein a phase control signal and an amplitude control signal corresponding to each antenna of the multi-antenna are calculated as control values for forming the directivity. The directivity control means includes
The wireless communication terminal according to claim 1, wherein the directivity direction is controlled to be located on a straight line connecting the wireless communication terminal and a communication partner. The wireless communication terminal
Having communication enable / disable determining means for determining whether communication is permitted or not;
The directivity control means includes
The radio communication terminal according to any one of claims 1 to 8, wherein a direction of the directivity is controlled based on a determination result by the communication availability determination unit. The directivity control means includes
When it is determined by the communication enable / disable determining means that the communication partner is not allowed to communicate,
The wireless communication terminal according to claim 9, wherein the directivity null point is controlled to be positioned on a straight line connecting the wireless communication apparatus and a communication partner. The wireless communication terminal
Power supply means for supplying power to the antenna;
The supply means includes
When the directivity direction is controlled by the directivity control means,
The wireless communication terminal according to claim 1, wherein the amount of power supplied to the antenna is reduced by a predetermined amount. The wireless communication terminal
Obtaining means for obtaining the other device position information from another wireless communication terminal;
Measuring means for measuring the distance from the wireless communication terminal to the communication partner;
The self-machine position calculation means for calculating the self-machine position information based on the other-machine position information acquired by the acquisition means and the distance measured by the measurement means. The wireless communication terminal according to any one of the above. A directivity control method in a wireless communication terminal including an antenna that forms directivity,
The antenna is driven to rotate based on other device position information indicating the position of another wireless communication terminal, own device position information indicating the position of the wireless communication terminal, and own device direction information indicating the direction of the wireless communication terminal. A first calculation procedure for calculating a control value for
A rotational drive procedure for rotationally driving the antenna based on the control value calculated by the first calculation procedure;
A directivity control method comprising: a directivity control procedure for controlling the direction of the directivity by rotationally driving the antenna by the rotational drive procedure. A directivity control method in a wireless communication terminal having a multi-antenna composed of a plurality of antennas forming directivity,
The multi-antenna is directed based on other device position information indicating the position of another wireless communication terminal, own device position information indicating the position of the wireless communication terminal, and own device direction information indicating the direction of the wireless communication terminal. A second calculation procedure for calculating a control value for forming the sex;
A directivity formation procedure for forming directivity of a plurality of patterns based on the control value calculated by the second calculation procedure;
A directivity control method, comprising: a directivity control procedure for controlling a direction of directivity to be formed when forming the directivity by the directivity formation procedure. A directivity control program in a wireless communication terminal having an antenna that forms directivity,
Computer
Based on other device position information indicating the position of another wireless communication terminal, own device position information indicating the position of the wireless communication terminal, and own device direction information indicating the direction of the wireless communication terminal, the direction of the directivity A directivity control program that functions as directivity control means for controlling the camera.   A computer-readable recording medium on which the directivity control program according to claim 15 is recorded.

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