JP2010177805A - Radio communication system, radio communication method and program for radio communication - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio communication system including a radio master unit and a radio slave unit which can be installed so as to optimize receiving conditions, and enabling stable communication even when a communication condition is changed after installation, and to provide a radio communication method and a program for radio communication. <P>SOLUTION: The reception level of a slave unit 2 is displayed on a slave unit reception level display part 14 equipped in a master unit 1, and the direction of the antenna 10 of the master unit 1 is set so that the slave unit 2 has a proper reception level. When the reception level of the slave unit 2 is reduced below a lower limit value, an alarm display part 14a of the master unit 1 displays an alarm. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wireless communication system, a wireless communication method, and a wireless communication program in which a parent device and a child device are connected via a wireless line.

  In a wireless LAN system composed of a master unit and a slave unit, communication between the master unit and the slave unit can be performed stably even when the communication conditions slightly change due to changes in weather conditions or changes in geographical conditions. Therefore, it is important to adjust the directions of the antennas of the master unit and the slave unit so that the reception levels of the master unit and the slave unit are as large as possible. However, since the installation locations of the master unit and the slave unit are usually separated, it has been troublesome to adjust the direction of each antenna while checking the reception level of each.

  In view of this, related arts are disclosed in Patent Documents 1 and 2. Patent Document 1 discloses a communication device that detects the electric field intensity of a received signal, generates an audio signal having a frequency corresponding to the detected electric field intensity, and a speaker outputs the audio signal. According to this apparatus, by adjusting the direction of the antenna of the own device so that the sound from the speaker is the highest or lowest, the direction of the antenna can be easily adjusted to the optimum direction.

  In Patent Document 2, each of the wireless master device and the wireless slave device measures the reception level of the device itself, means for transmitting the measurement value of the reception level to the communication partner, and the reception level measurement value of the device itself. And a wireless device provided with means for displaying the reception level of the other party. According to the technique disclosed in Patent Document 2, when installing a wireless master device and a wireless slave device, an operator can determine the installation position while referring to both reception levels.

JP 2005-102013 A JP 2003-151062 A

  However, in the related techniques disclosed in Patent Documents 1 and 2, when installing the master unit and the slave unit, the antenna orientation of each device can be adjusted according to the reception level of both devices. After the installation is completed and the installation is completed, no action will be taken even if the communication level changes and the reception level decreases, such as when the handset moves, so communication is suddenly interrupted. was there.

  Therefore, the present invention improves the inconveniences of the above related technologies, enables the wireless master unit and the wireless slave unit to be installed so that the respective reception conditions are optimum, and stable communication even when the communication conditions change after installation. It is an object of the present invention to provide a wireless communication system, a wireless communication method, and a wireless communication program that enable communication.

  In order to achieve the above object, a wireless communication system of the present invention is a wireless communication system in which a parent device and a child device are connected to each other via a wireless line to transmit and receive data, and the child device is connected to the parent device. A reception level measurement unit that measures the level of the received signal; and a slave unit side reception level notification unit that notifies the master unit of the reception level measurement value as a slave unit side reception level. Slave unit reception level reading section that reads the slave unit side reception level sent from the unit, and an alarm display that displays an alarm if the read slave unit reception level is below a preset lower limit value And a section.

  Further, the wireless communication method of the present invention is a wireless communication system in which a parent device and a child device are connected to each other via a wireless line to transmit and receive data, and the reception level measurement unit provided in the child device includes: The level of the signal received from the master unit is measured, and the reception level notification unit of the slave unit notifies the master unit of the reception level measurement value as the slave unit reception level, and the slave unit equipped in the master unit The side reception level reading unit reads the slave unit side reception level sent from the slave unit, and when the read slave unit side reception level is lower than a preset lower limit value, The alarm display unit displays an alarm.

  Still further, the wireless communication program of the present invention is sent from the slave unit in the master unit in a radio communication system in which the master unit and the slave unit are connected to each other via a radio line and transmits and receives data. A function for reading the reception level of the slave unit, which is the reception level of the slave unit, and a function for displaying an alarm on the alarm display section when the read level of the slave unit is less than a preset lower limit value And making the computer execute.

  Since the present invention is configured as described above, this notifies the master unit of the reception level of the slave unit, so that the orientation of the antenna of the master unit can be adjusted based on the reception level of the slave unit When the reception level of the slave unit falls below the lower limit, an alarm is displayed on the master unit side, so if the communication conditions between the master unit and the slave unit deteriorate, the antenna orientation of the master unit can be changed. The user can be prompted, and communication failure between the parent device and the child device can be avoided.

It is a functional block diagram which shows the structure of the main | base station in the radio | wireless communications system of one Embodiment concerning this invention. It is a functional block diagram which shows the structure of the subunit | mobile_unit in the radio | wireless communications system of embodiment disclosed in FIG. It is explanatory drawing showing the display format of the display part in the main | base station of embodiment disclosed in FIG. 3 is a flowchart showing an example of the operation of a base unit in the wireless system of the embodiment disclosed in FIG. 1. 6 is a flowchart illustrating another example of the operation of the parent device in the wireless system of the embodiment disclosed in FIG. 1.

  Hereinafter, an embodiment according to the present invention will be described with reference to the drawings.

  The wireless communication system according to the present embodiment is a wireless LAN device and includes a parent device 1 and a child device 2. FIG. 1 is a functional block diagram showing the configuration of the base unit 1 of this embodiment. FIG. 2 is a functional block diagram showing the configuration of the slave unit 2 of the present embodiment.

  As shown in FIG. 1, the base unit 1 of the present embodiment includes a communication antenna 10 that transmits and receives radio waves from a wireless line, a receiving unit 11 that receives a signal transmitted from the handset 2 via the antenna 10, A transmission unit 12 that transmits a signal to the child device 2 via the antenna 10, an interface unit 13 that is connected to an information device such as a server, and a child device side that displays the reception level of the child device transmitted from the child device 2 A reception level display unit 14, a reception level measurement unit 15 that measures the level of the signal received by the reception unit 11 as a parent device side reception level, and a parent that displays the parent device side reception level measured by the reception level measurement unit 15 A machine-side reception level display unit 16, a transmission level adjustment unit 17 that adjusts the level of a signal transmitted from the transmission unit 12 based on the slave unit-side reception level sent from the child machine 2, and an antenna 10 that drives the antenna 1 Antenna drive unit 18 that changes the direction of the receiver, these receiving unit 11, transmitting unit 12, interface unit 13, slave unit side reception level display unit 14, reception level measurement unit 15, base unit side reception level display unit 16, transmission level adjustment And a main control unit 19 that controls the operation of the antenna driving unit 18.

  In addition, as shown in FIG. 2, the slave unit 2 includes a communication antenna 20, a receiving unit 21 that receives a signal transmitted from the master unit 1 through the antenna 20, and a master unit 1 through the antenna 20. A transmission unit 22 that transmits a signal to the interface, an interface unit 23 that is connected to the information terminal, a reception level measurement unit 24 that measures the level of the signal received by the reception unit 21, and a main unit that controls the overall operation of the slave unit 2. And a control unit 29. The main control unit 29 has a function as a reception level notification unit that sends the reception level measured by the reception level measurement unit 24 to the transmission unit 22 and transmits the transmission level to the parent device 1.

  The receiving unit 11 equipped in the parent device 1 receives the signal from the child device 2 via the antenna 10, demodulates it, restores the data signal, and outputs this data signal. The transmission unit 12 generates a high-frequency carrier wave, modulates the carrier wave with the data signal input from the information device to the interface unit 13, amplifies the carrier wave, and outputs the amplified signal to the antenna 10.

  The slave unit side reception level display unit 14 acquires and displays the slave unit side reception level measured by the reception level measurement unit 24 in the slave unit 2 via the reception unit 11. Moreover, the subunit | mobile_unit side reception level display part 14 is provided with the alarm display part 14a which displays an alarm, if a subunit | mobile_unit side reception level is less than the preset lower limit. The slave-side reception level display unit 14 has a plurality of LEDs (Light Emitting Diodes) of different colors, and is configured to display level values step by step by combining color types and lighting / flashing. is doing. FIG. 3 is a diagram for explaining the display format of the handset-side reception level display unit 14.

  As shown in FIG. 3, the handset side reception level display unit 14 of the present embodiment is configured to display the reception level in the order of higher blinking green, green, orange, orange, and red. The alarm display unit 14a is configured to display red blinking as an alarm. Thus, by displaying the reception level on the slave unit side, the administrator can check the reception state of the slave unit 2 while staying on the master unit 1 side.

  Here, FIG. 1 shows that the master unit 1 is equipped with one slave unit-side reception level display unit 14, but if the wireless communication system has a plurality of slave units 2, 1 includes a plurality of handset-side reception level display units 14, so that the administrator can check the reception level of each handset 2.

  The reception level measurement unit 15 measures the level of the signal received by the antenna 10 and input by the reception unit 11 as the base unit side reception level. The base-side reception level display unit 16 displays the base-side reception level measured by the reception level measurement unit 15. The base-side reception level display unit 16 includes an alarm display unit 16a that displays an alarm when the base-side reception level falls below a preset lower limit value. The configuration of the master unit side reception level display unit 16 is the same as that of the slave unit side reception level display unit 14 described above, and displays the master unit side reception level step by step in the display format shown in FIG.

  The transmission level adjustment unit 17 controls the transmission unit 12 so as to lower the level of the transmission signal when the slave unit side reception level transmitted from the slave unit 2 exceeds a preset lower limit value. The transmission level adjustment unit 17 sets the transmission level from the transmission unit 12 when a level sufficient to perform stable communication is set as the lower limit value and a signal exceeding the lower limit value reaches the slave unit 2. Lower. This is because the optimal antenna orientation allows sufficient communication even if the transmission power is not maximum, so that it is possible to receive a radio signal further away from the handset 2 with an unnecessarily large transmission power. Since there is a concern about security problems, security can be ensured and power consumption can be reduced by providing the transmission level adjustment unit 17 capable of lowering the transmission level.

  The antenna driving unit 18 is a mechanism that drives the antenna 10 and changes the direction of the antenna 10. For example, it has a motor that rotates the antenna.

  The main control unit 19 controls the operation of the entire base unit 1. The main control unit 19 of the present embodiment has a function of outputting a data signal input from the reception unit 11 to the interface unit 13 and a function of transmitting a data signal input from the external information device to the interface unit 13 to the transmission unit 12. ing.

  The main control unit 19 also functions as a slave unit reception level reading unit that reads the slave unit side reception level transmitted from the slave unit 2 and received by the reception unit 11, and the read slave unit side reception. A function for displaying the level on the slave unit side reception level display unit 14 and the base unit side reception level measured by the reception level measurement unit 15 are input, and this base unit side reception level is displayed on the base unit side reception level display unit 16. It has a function to let you.

  Furthermore, the main control unit 19 monitors the reception level of the slave unit transmitted from the slave unit 2 and received by the reception unit 11, and controls the antenna drive unit 18 so that the reception level of the slave unit becomes the maximum value. A function as an antenna drive control unit for controlling the operation and adjusting the direction of the antenna 10 is provided.

  Here, the main control unit 19 in the present embodiment may be configured such that the function content is programmed and executed by a computer.

  In the above description, the function of the main control unit 19 as the antenna drive control unit is configured to automatically control the operation of the antenna drive unit 18 to adjust the direction of the antenna 10. Not limited to this, the operation of the antenna driving unit 18 may be manually controlled. In this case, the administrator can operate the antenna driving unit 18 so that each reception level becomes maximum by checking the slave unit side reception level display unit 14 and the master unit side reception level display unit 15.

  The receiving unit 21 provided in the slave unit 2 receives the signal from the master unit 1 via the antenna 20, demodulates it, restores the data signal, and outputs this data signal. The transmission unit 22 generates a high-frequency carrier wave, modulates the carrier wave with the data signal input to the interface unit 23, amplifies the carrier wave, and outputs the amplified carrier wave to the antenna 20.

  The reception level measurement unit 24 measures the slave unit side reception level, which is the level of the signal received by the antenna 20 and input by the reception unit 21, and sends it to the main control unit 29 to notify the master unit 1. The main control unit 29 controls the overall operation of the child device 2. The main control unit 29 of the present embodiment has a function of transmitting a data signal input from the receiving unit 21 to the external device from the interface unit 23, and a function of transmitting data information input from the external device to the interface unit 23 to the transmitting unit 22. It has.

  The main control unit 29 provided in the slave unit 2 inputs the slave unit side reception level measured by the reception level measuring unit 24, and outputs the slave unit side reception level to the transmitter unit 22 for transmission to the master unit 1. It has a function as a slave unit side reception level notification unit.

  As described above, according to the wireless communication system of the present embodiment, the slave unit 2 measures the reception level of the radio signal, notifies the slave unit side reception level to the master unit 1, and the master unit 1 receives the slave unit side reception. Since the level is received, the direction of the antenna 10 of the base unit 1 can be adjusted according to the reception level on the handset side. Further, since an alarm is displayed when the reception level on the slave side is below the lower limit value, it is possible to prompt the administrator to change the orientation of the antenna 10.

  In the wireless communication system of the present embodiment, since the master unit 1 can hold both the slave unit side reception level and the master unit side reception level, the reception state of the slave unit 2 and the reception state of the master unit 1 can be maintained. The orientation of the antenna 10 of the base unit 1 can be adjusted based on both states.

  Next, the operation of the wireless communication system of this embodiment will be described. Here, the following description of the operation is an embodiment of the wireless communication method of the present invention.

  FIG. 4 is a flowchart showing an example of the operation when the base unit 1 is installed in the wireless communication system of the present embodiment. When the base unit 1 is installed, first, the transmission unit 12 transmits a test signal (step S1 in FIG. 4). If the reception unit 11 does not receive a data signal including the reception level on the slave unit side from the slave unit 2 within a predetermined time after the test signal is transmitted (Yes in step S3 in FIG. 4), the main control unit 19 sets the antenna The operation of the drive unit 18 is controlled to change the direction of the antenna 10 (step S4 in FIG. 4), and the transmission unit 12 transmits a test signal again (step S1 in FIG. 4).

  When the receiving unit 11 receives a reply from the slave unit 2 within a predetermined time from the transmission of the test signal (Yes in step S2 in FIG. 4), the reception level measurement is performed on the master unit side reception level that is the level of the received signal. The unit 15 performs measurement (step S5 in FIG. 4). Then, the handset side reception level display unit 14 and the base unit side reception level display unit 16 indicate the handset side reception level sent from the handset 2 and the base unit side reception level measured by the reception level measurement unit 15. This is displayed (step S6 in FIG. 4).

  Subsequently, the main control unit 19 determines whether or not the slave unit side reception level sent from the slave unit 2 and the master unit side reception level measured by the reception level measuring unit 14 is the maximum value (FIG. 4). Step S7), when both levels or one of the levels is not the maximum value (No in Step S7 in FIG. 4), the main control unit 19 controls the operation of the antenna drive unit 18 to change the direction of the antenna 10. The transmission unit 11 transmits the test signal again (step S1 in FIG. 4).

  Here, the configuration in which the main control unit 19 controls the operation of the antenna driving unit 18 may be configured such that the administrator manually operates the antenna driving unit 18. In this case, the user changes the orientation of the master unit 1 so as to maximize the reception level on the slave unit while viewing the display, or operates the antenna drive unit 18. Then, the administrator changes the direction of the master unit 1 or operates the antenna drive unit 18 so as to maximize the master unit side reception level while confirming that the slave unit side reception level does not decrease.

  When both the reception level on the slave unit side and the master unit side become maximum values (Yes in step S7 in FIG. 4), it is determined whether or not the reception level on the slave unit side at this time exceeds a preset upper limit value. When the main control unit 19 determines (step S8 in FIG. 4) and does not exceed, the installation process is completed. If it has exceeded (Yes in step S8 in FIG. 4), the transmission level adjustment unit 17 lowers the transmission level of the transmission unit 12 (step S9 in FIG. 4), and the transmission unit 11 transmits the test signal again (FIG. 4). Step S1). As a result, it is possible to prevent an increase in the probability of information leakage because the base unit 1 can output a signal with an unnecessarily large transmission power and can receive a signal at a longer distance from the base unit 2.

  Next, the alarm display operation of the base unit 1 will be described. FIG. 5 is a flowchart showing an alarm display operation of the parent device 1 in the present embodiment.

  First, at the time of communication, the receiving unit 11 receives a data signal including the reception level of the slave unit transmitted from the slave unit 2 (step S10 in FIG. 5), and sets the lower limit value in which the slave unit reception level is set in advance. The main control part 19 determines whether it is less (step S11 of FIG. 5). If it is not lower, the process is terminated, and if it is lower, the alarm display unit 14a displays an alarm (step S11 in FIG. 5).

  As described above, since the base unit 1 includes the handset side reception level display unit 14 that displays the reception state of the handset 2, the wireless communication system of the present embodiment is based on the reception state of the handset 2. The base unit 1 can be installed and adjusted. In addition, since the master unit 1 is equipped with an alarm display unit 14a that displays an alarm when the reception status of the slave unit 2 falls below the lower limit value, the manager can be informed of the deterioration of communication conditions. Can be prompted to change the direction of the antenna of the base unit 1.

DESCRIPTION OF SYMBOLS 1 Master unit 2 Slave unit 10,20 Antenna 11, 21 Receiver unit 12, 22 Transmitter unit 13, 23 Interface unit 14 Slave unit side reception level display unit 14a Alarm display unit 15, 24 Reception level measurement unit 16 Base unit side reception level Display unit 16a Alarm display unit 17 Transmission level adjustment unit 18 Antenna drive unit 19, 29 Main control unit

Claims (16)

In a wireless communication system in which a master unit and a slave unit are connected to each other via a wireless line to transmit and receive data,
The slave is
A reception level measurement unit that measures the level of the signal received from the base unit, and a handset side reception level notification unit that notifies the base unit of the reception level measurement value as a handset side reception level,
The base unit is
A slave unit side reception level reading unit that reads the slave unit side reception level sent from the slave unit, and an alarm is displayed when the read slave unit side reception level is lower than a preset lower limit value. A wireless communication system comprising an alarm display unit. The wireless communication system according to claim 1,
The wireless communication system, wherein the master unit includes a slave unit side reception level display unit that displays a slave unit side reception level read by the slave unit side reception level reading unit. The wireless communication system according to claim 2, wherein
The master unit adjusts the transmission level to lower the level of the signal transmitted from the master unit when the slave unit side receive level read by the slave unit side receive level reading unit exceeds a preset upper limit value. A wireless communication system comprising a unit. The wireless communication system according to claim 3, wherein
The base unit includes an antenna driving unit that drives a pre-equipped communication antenna to change the direction of the antenna, and the antenna so that the reception level on the side of the slave unit transmitted from the slave unit becomes a maximum value. A radio communication system, comprising: an antenna drive control unit that controls an operation of the drive unit to adjust a direction of the antenna. The wireless communication system according to claim 4, wherein
The master unit includes a reception level measuring unit that measures the level of the signal received from the slave unit as a master unit side reception level, and a master unit side reception level display unit that displays the measured master unit side reception level. A wireless communication system comprising: The wireless communication system according to claim 5, wherein
The antenna drive control unit provided in the base unit controls the operation of the antenna drive unit so that both the reception level on the slave unit side and the reception level on the base unit become maximum values. system. In the master unit in a wireless communication system in which a master unit and a slave unit are connected to each other via a wireless line to transmit and receive data,
A slave unit side reception level reading unit that reads a slave unit side reception level that is a reception level of the slave unit transmitted from the slave unit;
A master unit comprising: an alarm display unit for displaying an alarm when the slave-unit-side reception level read is below a preset lower limit value. In a wireless communication system in which a parent device and a child device are connected to each other via a wireless line to transmit and receive data,
The reception level measurement unit equipped in the slave unit measures the level of the signal received from the master unit,
The reception level notification unit of the slave unit notifies the master unit of the reception level measurement value as a slave unit side reception level,
The handset side reception level reading unit equipped in the base unit reads the handset side reception level sent from the handset,
A wireless communication method, wherein the alarm display unit of the master unit displays an alarm when the read level on the slave side is less than a preset lower limit value. The wireless communication method according to claim 8, wherein
After the slave unit side reception level reading unit of the master unit reads the slave unit side reception level,
A wireless communication method characterized in that the slave unit side reception level is displayed by a slave unit side reception level display unit equipped in the master unit. The wireless communication method according to claim 9, wherein
After the slave unit side reception level reading unit of the master unit reads the slave unit side reception level,
A wireless communication method, wherein, when the slave unit side reception level exceeds a preset upper limit value, a transmission level adjustment unit equipped in the master unit lowers the transmission level of the master unit. The wireless communication method according to claim 10, wherein
After the receiving unit equipped in the master unit receives the slave unit side reception level from the slave unit,
The antenna drive control unit equipped in the master unit controls the operation of the antenna drive unit that drives the antenna of the master unit so that the slave unit side reception level sent from the slave unit becomes the maximum value. A wireless communication method comprising adjusting an antenna direction. The wireless communication method according to claim 11, wherein
The reception level measurement unit equipped in the master unit measures the level of the signal received from the slave unit as the master unit side reception level,
The wireless communication method according to claim 1, wherein the measured base unit side reception level is displayed by a base unit side reception level display unit equipped in the base unit. The wireless communication method according to claim 12, wherein
When the antenna drive control unit equipped in the base unit controls the operation of the antenna drive unit,
The wireless communication method characterized by controlling operation | movement of the said antenna drive part so that both the said subunit | mobile_unit side reception level and the said main | base station reception level may become the maximum value. In a master unit in a wireless communication system in which a master unit and a slave unit are connected to each other via a wireless line to transmit and receive data,
A function of reading the reception level of the slave unit that is the reception level of the slave unit sent from the slave unit;
A program for wireless communication, which causes a computer to execute a function of displaying an alarm on the alarm display unit when the read level on the slave side is less than a preset lower limit value. In the wireless communication program according to claim 14,
A program for wireless communication, which causes a computer to execute a function of displaying the read reception level on the slave side on a display unit. In the wireless communication program according to claim 15,
For wireless communication, which causes the computer to execute a function of reducing the level of a signal to be transmitted when the reception level on the slave unit sent from the slave unit exceeds a preset upper limit value program.

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