JP5541538B2 - COMMUNICATION DEVICE AND ITS CONTROL METHOD - Google Patents

Description

  The present invention relates to a communication device that performs wireless communication with another communication device and a control method thereof.

  There is a communication system in which one communication device is a parent device and the other communication device is a child device, and the parent device and the child device perform wireless communication. Examples of such a communication system include a cordless telephone system and a wireless local area network (LAN) system in which an access point device corresponding to a parent device and a client terminal corresponding to a child device perform wireless communication.

  In Patent Document 1 (Japanese Patent Laid-Open No. 2001-128246), in a communication system in which a parent device and a child device perform wireless communication, a predetermined communication quality is maintained after the parent device and the child device establish wireless communication. In such a range, a technique is disclosed in which wireless communication characteristics such as transmission gain characteristics of transmission amplifiers of each device are reduced so that power consumption is reduced. According to this technology, it is possible to reduce power consumption while maintaining predetermined communication quality.

JP 2001-128246 A

  In a communication system in which a parent device and a child device perform wireless communication as described above, wireless communication can usually be performed even if the parent device and the child device are separated from each other to some extent as defined by a standard or the like. A signal is output at a constant transmission output level, and establishment of wireless communication is started. Here, depending on the use state or the like, the base unit may be used in a state where the base unit is close to the base unit, for example, a state where the base unit is mounted on the base unit. When the master unit and the slave unit are close to each other, if the transmitting side outputs a signal at the same transmission output level when the master unit and the slave unit are separated, the transmission output level is too high on the receiving side. There is a problem that a signal cannot be received and wireless communication may not be established between the parent device and the child device. The technique disclosed in Patent Document 1 is to adjust the wireless communication characteristics of each device after establishing wireless communication between the parent device and the child device, and the transmission output level at the time of establishing wireless communication is considered. It does not solve the above-described problems.

  An object of the present invention is to provide a communication device capable of establishing wireless communication even in a state where it is close to another communication device, and a control method therefor.

In order to achieve the above object, the communication device of the present invention provides:
A communication device that performs wireless communication with another communication device,
A proximity detector that detects whether or not the other communication devices are close to each other and outputs a detection result;
A wireless transmission unit capable of changing a transmission output level to the other communication device;
When a request for establishing wireless communication with the other communication device is input in a state where the proximity of the other communication device is detected by the proximity detection unit, the transmission output level of the wireless transmission unit is changed, Determine the success or failure of establishment of the wireless communication with the other communication device at the transmission output level, specify the transmission output level capable of establishing the wireless communication with the other communication device, and specify the specified transmission output level A transmission output control unit for causing the wireless transmission unit to establish wireless communication with the other communication device;
A low-power radio unit for short-range communication with the other communication device;
Possess the identification information of the other communication apparatus, and a data storage unit for storing in association with, and minimum transmission power level capable of establishing wireless communication in a state in which the other communication apparatus is in proximity,
The low-power radio unit receives identification information of the other communication device from the other communication device;
When the low-power radio unit receives identification information from another communication device, the transmission output control unit sends the radio transmission unit with the transmission output level stored in the data storage unit corresponding to the identification information. Ru to establish wireless communication with other communication devices.

In order to achieve the above object, a method for controlling a communication device of the present invention includes:
A communication device control method for performing wireless communication with another communication device,
Detecting whether the other communication device is in proximity,
When a request for establishing wireless communication with the other communication device is input in a state where proximity of the other communication device is detected, each transmission output is changed while changing a transmission output level to the other communication device. Determining the success or failure of establishment of wireless communication with the other communication device at a level, specifying a transmission output level capable of establishing wireless communication with the other communication device, and determining the transmission output level with the specified transmission output level Establish wireless communication with other communication devices ,
The identification information of the other communication device and the minimum transmission output level at which wireless communication can be established in a state where the other communication device is in close proximity are stored in association with each other,
When short-distance communication is performed with the other communication device and identification information is received from the other communication device, wireless communication with the other communication device is established at a transmission output level stored corresponding to the identification information. you.

  According to the present invention, it is possible to establish wireless communication even in the state of being close to another communication device.

It is a figure which shows the principal part structure of the communication system of the 1st Embodiment of this invention. It is a flowchart which shows operation | movement of the communication apparatus shown in FIG. It is a figure which shows an example of the connection initial setting memorize | stored in the data storage part shown in FIG. It is a figure which shows the principal part structure of the communication system of the 2nd Embodiment of this invention. It is a flowchart which shows operation | movement of the communication apparatus shown in FIG. It is a figure which shows an example of the subunit | mobile_unit information memorize | stored in the data storage part shown in FIG. It is a figure which shows an example of the subunit | mobile_unit information memorize | stored in the data storage part shown in FIG.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated with reference to drawings.

(First embodiment)
FIG. 1 is a diagram showing a main configuration of a communication system 1 according to the first embodiment of the present invention.

  A communication system 1 shown in FIG. 1 includes a communication device 10 and a slave device communication device 20.

  The communication device 10 can be connected to a LAN, the Internet, or the like via the network 50 and can communicate with the child device communication device 20 which is another communication device.

  The subunit | mobile_unit communication apparatus 20 can communicate with the communication apparatus 10, and performs the connection to LAN, the internet, etc. via the communication apparatus 10. FIG.

  Note that the communication device 10 is provided with a mounting portion (not shown) in FIG. 1, and the slave device communication device 20 can be mounted on the mounting portion.

  Next, the configuration of the communication device 10 will be described.

  1 includes a network communication unit 11, an antenna 12, a radio reception unit 13, a radio transmission unit 14, a transmission output control unit 15, a proximity detection unit 16, a control unit 17, and data. Storage unit 18. In FIG. 1, only processing blocks directly related to the present invention are described, and other processing blocks such as an input unit for performing operation input to the communication device 10 are omitted.

  The network communication unit 11 is connected to a LAN, the Internet, or the like via the network 50 according to Ethernet (registered trademark) defined by the IEEE 802.3 standard.

  The wireless reception unit 13 receives data transmitted from the slave communication device 20 via the antenna 12.

  The wireless transmission unit 14 transmits data to the slave communication device 20 via the antenna 12.

  Each of the wireless reception unit 13 and the wireless transmission unit 14 receives data from the slave unit communication device 20 and transmits data to the slave unit communication device 20 by, for example, a communication method compliant with the IEEE 802.11 standard. I do.

  The transmission output control unit 15 controls the transmission output level of the wireless transmission unit 14.

  The proximity detection unit 16 detects whether or not the handset communication device 20 is close to the communication device 10, and outputs a detection signal indicating the detection result to the control unit 17.

  As described above, the communication device 10 is provided with the mounting unit. The proximity detection unit 16 determines whether or not the slave unit communication device 20 is close to the communication device 10 based on whether or not the slave unit communication device 20 is mounted on the mounting unit. For example, the mounting unit is provided with a switch that is pressed when the slave unit communication device 20 is mounted, and the proximity detection unit 16 determines whether the slave unit communication device 20 is in accordance with whether or not the switch is pressed. It is determined whether or not the communication device 10 is in proximity. In addition, for example, the mounting unit is provided with a weight detection unit that detects a change in the weight of the mounting unit. It is determined whether or not it is close to.

  The control unit 17 is a CPU (Central Processing Unit) that performs various logical operations, and controls the overall operation of the communication apparatus 10.

  The data storage unit 18 stores various data such as a connection initial setting indicating a setting of a transmission output level when the communication device 10 starts wireless communication with the slave device communication device 20.

  Next, the structure of the subunit | mobile_unit communication apparatus 20 is demonstrated.

  A slave unit communication apparatus 20 shown in FIG. 1 includes an antenna 21, a slave unit radio receiver 22, a slave unit radio transmitter 23, a slave unit transmission output controller 24, a slave unit controller 25, and slave unit data. Storage unit 26. In FIG. 1, only processing blocks directly related to the present invention are described, and other processing blocks such as an input unit for performing operation input to the slave unit communication device 20 are omitted. .

  The subunit | mobile_unit radio | wireless receiver 22 receives the data transmitted from the communication apparatus 10 via the antenna 21. FIG.

  The slave unit wireless transmission unit 23 transmits data to the communication device 10 via the antenna 21.

  The slave unit wireless reception unit 22 and the slave unit wireless transmission unit 23 receive data from the communication device 10 and transmit data to the communication device 10 by a communication method compliant with, for example, the IEEE 802.11 standard. I do.

  The slave unit transmission output control unit 24 controls the transmission output level of the slave unit wireless transmission unit 23.

  The subunit | mobile_unit control part 25 is CPU etc. which perform various logic operations, and controls operation | movement of the subunit | mobile_unit communication apparatus 20 whole.

  The subunit | mobile_unit data storage part 26 memorize | stores various data, such as a program for the subunit | mobile_unit control part 25 to perform a logical operation.

  Next, the operation of the communication device 10 of this embodiment will be described.

  FIG. 2 is a flowchart showing the operation of the communication device 10 when starting communication with the slave device communication device 20.

  In the following, it is assumed that the wireless transmission unit 14 can change the transmission output level from level 1 with the smallest output to level 5 with the largest output.

  For example, the proximity detection unit 16 periodically detects whether or not the slave device communication device 20 is close to the communication device 10 and outputs the detection result to the control unit 17 (step S201).

  When the handset communication device 20 is not close to the communication device 10 (step S201: No), the proximity detection unit 16 repeats the process of step S201.

  When the handset communication device 20 approaches the communication device 10 (step S201: Yes), for example, when a request for establishing wireless communication with the handset communication device 20 is input via the input unit, the control unit 17 The transmission output control unit 15 is notified that a request for establishment of wireless communication with the slave communication device 20 is input. In response to the notification from the control unit 17, the transmission output control unit 15 starts adjustment processing of the transmission output level of the wireless transmission unit 14.

  First, the transmission output control unit 15 reads the connection initial settings stored in the data storage unit 18 via the control unit 17 (step S202).

  FIG. 3 is a diagram illustrating an example of connection initial settings.

  As shown in FIG. 3, as a connection initial setting, when the slave communication device 20 is close, the transmission output level at the start of establishment of wireless communication is set to level 3, and wireless communication is performed with the minimum transmission output level. It is set to establish.

  Here, the transmission output level of level 3 is a transmission output that does not cause a problem that wireless communication cannot be performed because the transmission output is too large when the slave communication device 20 is close to the communication device 10. Is a level.

  Referring to FIG. 2 again, the transmission output control unit 15 sets the transmission output level to level 3 in accordance with the read connection initial setting, and starts establishing wireless communication with the slave unit communication device 20 in the wireless transmission unit 14. (Step S203).

  Next, the transmission output control unit 15 determines whether the wireless communication with the slave unit communication device 20 has been successfully established, for example, depending on whether the wireless reception unit 13 receives a reception response from the slave unit communication device 20. Is determined (step S204).

  If the wireless communication is successfully established (step S204: Yes), there is a possibility that the wireless communication can be established even if the transmission output level is lower than level 3. In the connection initial setting, since it is defined that the wireless communication is established with the minimum transmission output level, the transmission output control unit 15 determines whether or not the transmission output level can be lowered (step S205). .

  As described above, level 3 is set as the transmission output level. Further, since the wireless transmission unit 14 can set the transmission output level from level 1 to level 5, the transmission output level can be lowered from level 3.

  When the transmission output level can be lowered (step S205: Yes), the transmission output control unit 15 causes the wireless transmission unit 14 to disconnect the wireless communication with the slave unit communication device 20, and the transmission output level is lower than the previous transmission output level. A low level, for example, level 2 is set in the wireless transmission unit 14 (step S206), and establishment of wireless communication with the slave communication device 20 is started (step S207).

  Next, the transmission output control unit 15 determines whether or not the wireless communication with the child device communication apparatus 20 has been successfully established (step S208).

  If the wireless communication is successfully established (step S208: Yes), the transmission output control unit 15 returns to the process of step S205.

  When the establishment of the wireless communication has failed (step S208: No), the transmission output control unit 15 sets the minimum transmission output level among the transmission output levels that have successfully established the wireless communication with the slave unit communication device 20. The wireless transmission unit 14 is made to establish wireless communication with the child device communication device 20 at the specified transmission output level (step S209).

  Thereafter, the transmission output control unit 15 causes the wireless transmission unit 14 to notify the slave unit communication device 20 that the setting of the transmission output level of the communication device 10 has been completed (step S210), and ends the process.

  If the transmission output level set in the wireless transmission unit 14 is level 1 and the transmission output level cannot be lowered (step S205: No), the transmission output control unit 15 proceeds to the process of step S210.

  On the other hand, if establishment of wireless communication has failed in step S204 (step S204: No), the transmission output control unit 15 determines whether or not the transmission output level can be increased (step S211).

  As described above, level 3 is set as the transmission output level. Further, since the wireless transmission unit 14 can set the transmission output level from level 1 to level 5, the transmission output level can be increased from level 3.

  When the transmission output level can be increased (step S211: Yes), the transmission output control unit 15 sets a level higher than the previous transmission output level, for example, level 4 in the wireless transmission unit 14 (step S212). ), Establishment of wireless communication with the slave unit communication device 20 is started (step S213).

  Next, the transmission output control unit 15 determines whether or not the wireless communication with the child device communication apparatus 20 has been successfully established (step S214).

  When the wireless communication is successfully established (step S214: Yes), the transmission output control unit 15 proceeds to the process of step S210.

  If establishment of wireless communication has failed (step S214: No), the transmission output control unit 15 returns to the process of step S211 and determines whether or not the transmission output level can be increased.

  When the transmission output level set in the wireless transmission unit 14 is level 5 and the transmission output level cannot be increased (step S211: No), the transmission output control unit 15 performs wireless communication with the slave unit communication device 20. Assume that communication cannot be established (step S215), and the process ends.

  In the handset communication device 20, when it is notified that the setting of the transmission output level of the communication device 10 is completed, the handset transmission output control unit 24 performs the same process as the above-described transmission output control unit 15 to The transmission output level adjustment process of the machine radio transmitter 23 is started.

  As described above, according to the present embodiment, the communication device 10 changes the transmission output level when a request for establishing wireless communication with the child device communication device 20 is input in a state where the child device communication device 20 is in proximity. However, it is determined whether or not the wireless communication with the slave unit communication device 20 is established at each transmission output level, and the minimum transmission output level that can establish the wireless communication with the slave unit communication device 20 is specified and specified. Wireless communication with the slave unit communication device 20 is established at the transmission output level.

  Since the wireless communication is established at the minimum transmission output level capable of establishing the wireless communication with the slave unit communication device 20, the transmission output level is also obtained when the communication device 10 and the slave unit communication device 20 are close to each other. Therefore, it is possible to prevent the wireless communication from being unable to be established because it is too high. In addition, it is possible to avoid deterioration of reception characteristics due to the presence of a very high radio wave source at a short distance, a communication abnormal state, or a communication impossible state. In addition, since it is possible to avoid an unnecessarily high transmission output level, it is possible to reduce power consumption.

  In the present embodiment, the transmission output level at the start of establishment of wireless communication is set to level 3, and the transmission output level is increased or decreased according to the success or failure of establishment of wireless communication. Is not something For example, the transmission output level at the start of wireless communication may be set to level 1, and the transmission output level may be increased until wireless communication is successfully established.

  In this embodiment, the example in which the transmission output level is raised or lowered according to the success or failure of establishment of wireless communication has been described. However, the present invention is not limited to this, and the transmission / reception speed of data and reception at the wireless reception unit The transmission output level may be raised or lowered according to the strength or the like.

  In the present embodiment, the transmission output level of the slave device 20 is set after the transmission output level adjustment process of the communication device 10 is completed. However, the present embodiment is not limited to this. Instead, the communication device 10 and the slave device communication device 20 may perform transmission output level adjustment processing at the same time.

(Second Embodiment)
FIG. 4 is a diagram showing a main configuration of a communication system 1A according to the second embodiment of the present invention. In FIG. 4, the same components as those in FIG.

  A communication system 1A shown in FIG. 4 includes a communication device 10A and a slave device communication device 20A.

  The communication device 10A corresponds to the communication device 10 of the first embodiment, can be connected to a LAN, the Internet, or the like via the network 50, and communicates with other communication devices such as the slave device communication device 20A. Is possible.

  The slave unit communication device 20A corresponds to the slave unit communication device 20 of the first embodiment, can communicate with the communication device 10A, and is connected to a LAN or the Internet via the communication device 10A. Do.

  Next, the configuration of the communication device 10A will be described.

  10 A of communication apparatuses of this embodiment are the points which added the antenna 41 and the low electric power radio | wireless part 42 compared with the communication apparatus 10 of 1st Embodiment, and the point which changed the proximity detection part 16 into the proximity detection part 43 And the transmission output control unit 15 is changed to the transmission output control unit 44. In FIG. 4, only processing blocks directly related to the present invention are described, and description of other processing blocks such as an input unit for performing operation input to the communication device 10 </ b> A is omitted.

  The low-power radio unit 42 transmits and receives data to and from the slave device communication apparatus 20A via the antenna 41 using a low-power radio capable of short-range communication only in a very narrow range. Note that the low-power radio is used, for example, for authentication at the time of non-contact power feeding.

  The proximity detection unit 43 detects whether or not the slave device communication device 20A is close to the communication device 10A by the success or failure of communication using the low power wireless communication with the slave device communication device 20A by the low power wireless unit 42, A detection signal indicating the detection result is output to the control unit 17.

  The transmission output control unit 44 controls the transmission output level of the wireless transmission unit 14.

  Next, the configuration of the slave unit communication device 20A will be described.

  20 A of subunit | mobile_unit communication apparatuses of this embodiment differ in the point which provided the antenna 45 and the low power radio | wireless part 46 compared with the subunit | mobile_unit communication apparatus 20A of 1st Embodiment. In FIG. 4, only processing blocks directly related to the present invention are described, and description of other processing blocks such as an input unit for performing operation input to the slave unit communication device 20A is omitted. .

  The low-power radio unit 46 is provided corresponding to the low-power radio unit 42 of the communication device 10A, and uses a low-power radio capable of short-range communication only in a very narrow range, via the antenna 45. Data is transmitted to and received from the communication device 10A.

  Next, the operation of the communication device 10A according to the present embodiment will be described.

  FIG. 5 is a flowchart showing the operation of the communication device 10A when starting communication with the slave device communication device 20A.

  For example, the proximity detection unit 43 periodically determines whether or not the low-power wireless unit 42 is communicating with the slave device communication device 20A using the low-power wireless (step S501).

  When the low power wireless unit 42 is not communicating with the slave device communication device 20A by the low power wireless (step S501: No), the proximity detection unit 43 repeats the process of step S501.

  When the low-power wireless unit 42 is communicating with the slave device communication device 20A by the low-power wireless (step S501: Yes), the proximity detection unit 43 notifies the control unit 17 to that effect. Upon receiving the notification from the proximity detection unit 43, the control unit 17 receives the notification from the proximity detection unit 43 through the low-power wireless unit 42, such as the device name, serial number, and MAC address (Media Access Control address) of the slave device communication device 20A. To get. For example, when a request for establishment of wireless communication with the child device communication apparatus 20A is input via the input unit, the control unit 17 receives a request for establishment of wireless communication with the adjacent child device communication apparatus 20A. The transmission output control unit 44 is notified together with the slave unit identification information of the slave unit communication device 20A. Upon receiving the notification from the control unit 17, the transmission output control unit 44 starts the transmission output level adjustment process of the wireless transmission unit 14.

  First, the transmission output control unit 44 reads out the handset information stored in the data storage unit 18 via the control unit 17 (step S502).

  FIG. 6 is a diagram showing an example of handset information.

  As shown in FIG. 6, as slave unit information, slave unit identification information such as the device name, serial number, and MAC address of the slave unit communication device 20A that has established wireless communication in the state of proximity to each other, and the slave unit communication unit 20A And the transmission output level set when the wireless communication is established.

  Referring to FIG. 5 again, the transmission output control unit 15 reads the connection initial setting stored in the data storage unit 18 via the control unit 17 (step S503). Here, it is assumed that the connection initial setting shown in FIG. 3 is stored in the data storage unit 18.

  Next, the transmission output control unit 44 determines whether or not the slave unit identification information notified from the control unit 17 is included in the slave unit information read from the data storage unit 18, that is, whether or not it has been registered in the slave unit information. Is determined (step S504).

  If the slave unit identification information notified from the control unit 17 is not registered in the slave unit information (step S504: No), the transmission output control unit 44 proceeds to the process of step S203 shown in FIG. The adjustment process is started (step S505).

  Through the transmission output level adjustment process, the transmission output control unit 44 can establish wireless communication with the slave unit communication device 20A, specifies the minimum transmission output level, and uses the transmission output level as a wireless transmission unit. 14 establishes wireless communication with the slave unit communication device 20A, the slave unit identification information of the slave unit communication device 20A is associated with the specified transmission output level and stored in the data storage unit 18, and the slave unit information is updated. (Step S506).

  FIG. 7 is a diagram illustrating an example of the updated handset information.

  Assume that wireless communication can be established with a slave output device 20A whose device name is “CCC” at a transmission output level of level 1. In this case, as shown in FIG. 7, transmission output level 1 is stored in the data storage unit 18 as slave unit information corresponding to the device name “CCC”.

  After updating the slave unit information, the transmission output control unit 44 causes the wireless transmitter unit 14 to notify the slave unit communication device 20A that the setting of the transmission output level of the communication device 10A has been completed (step S509), and ends the processing. To do.

  When the slave unit identification information notified from the control unit 17 has been registered in the slave unit information (step S504: Yes), the transmission output control unit 44 wirelessly transmits the transmission output level corresponding to the slave unit identification information. Set in the unit 14 to start establishment of wireless communication with the slave communication device 20A (step S507).

  Next, the transmission output control unit 44 determines whether or not the wireless communication with the slave communication device 20A has been successfully established (step S508).

  If establishment of wireless communication has failed (step S508: No), the transmission output control unit 44 proceeds to the process of step S505, and starts a transmission output level adjustment process. Note that the transmission output level stored in correspondence with the slave unit identification information of the slave unit communication device 20A is the minimum transmission output level at which wireless communication can be established previously. However, due to environmental changes and other factors, establishment of wireless communication with the slave unit communication apparatus 20A fails even if the transmission output level stored in correspondence with the slave unit identification information is used in the slave unit information. There is.

  When the wireless communication is successfully established (step S508: Yes), the transmission output control unit 44 proceeds to the process of step S509.

  As described above, according to the present embodiment, the communication device 10A includes the small power wireless unit 42 that can communicate with the slave device communication device 20A only in a very narrow range. It is determined whether or not the handset communication device 20A is in close proximity based on the success or failure of communication using the low power radio with the communication device 20A.

  The low-power radio unit 42 is used, for example, for authentication at the time of non-contact power feeding. Therefore, by determining whether or not the slave unit communication device 20A is close by the success or failure of the communication using the low power radio with the slave unit communication device 20A by the low power wireless unit 42, the first embodiment of the first embodiment. As described above, it is not necessary to provide a switch or a weight sensor in order to determine whether or not the slave device communication device 20A is close to the communication device 10A, reducing the number of parts, simplifying the configuration of the communication device 10A, and the like. Can be planned.

  Further, according to the present embodiment, the communication device 10A associates the child device identification information of the child device wireless communication device 20A that has previously established wireless communication with the transmission output level when the wireless communication is established. When the slave unit information is stored, and when there is a request for establishing wireless communication with the slave unit communication device 20A, if the slave unit identification information of the slave unit communication device 20A is already registered in the slave unit information, the slave unit identification information The wireless communication is established at the transmission power level corresponding to.

  Therefore, it is not necessary to adjust the transmission output level each time a request for establishing wireless communication with the slave device communication apparatus 20A is input, and the time required for establishing wireless communication can be reduced.

DESCRIPTION OF SYMBOLS 1,1A Communication system 10, 10A Communication apparatus 11 Network communication part 12, 21, 41, 44 Antenna 13 Wireless reception part 14 Wireless transmission part 15, 43 Transmission output control part 16 Proximity detection part 17 Control part 18 Data storage part 20 Child Machine communication device 22 Slave radio reception unit 23 Slave radio transmission unit 24, 46 Slave unit transmission output control unit 25 Slave unit control unit 26 Slave unit data storage unit 42, 45 Low power radio unit

Claims (6)

A communication device that performs wireless communication with another communication device,
A proximity detector that detects whether or not the other communication devices are close to each other and outputs a detection result;
A wireless transmission unit capable of changing a transmission output level to the other communication device;
When a request for establishing wireless communication with the other communication device is input in a state where the proximity of the other communication device is detected by the proximity detection unit, the transmission output level of the wireless transmission unit is changed, Determine the success or failure of establishment of the wireless communication with the other communication device at the transmission output level, specify the transmission output level capable of establishing the wireless communication with the other communication device, and specify the specified transmission output level A transmission output control unit for causing the wireless transmission unit to establish wireless communication with the other communication device;
A low-power radio unit for short-range communication with the other communication device;
Possess the identification information of the other communication apparatus, and a data storage unit for storing in association with, and minimum transmission power level capable of establishing wireless communication in a state in which the other communication apparatus is in proximity,
The low-power radio unit receives identification information of the other communication device from the other communication device;
When the low-power radio unit receives identification information from another communication device, the transmission output control unit sends the radio transmission unit with the transmission output level stored in the data storage unit corresponding to the identification information. communication apparatus according to claim Rukoto to establish wireless communication with other communication devices. The communication device according to claim 1.
The transmission output control unit
A communication apparatus capable of establishing wireless communication with the other communication apparatus and specifying a minimum transmission output level. The communication device according to claim 1 or 2,
A mounting section on which the other communication device can be mounted;
A switch that is pressed by mounting the other communication device on the mounting unit,
The proximity detection unit detects whether or not the other communication device is close based on whether or not the switch is pressed. The communication device according to claim 1 or 2,
A mounting section on which the other communication device can be mounted;
A weight detection unit that detects and outputs a weight change of the mounting unit, and
The proximity detection unit detects whether or not the other communication device is close by an output of the weight detection unit. The communication device according to claim 1 or 2 ,
Before SL proximity detector, a communication apparatus characterized by detecting whether said other communication apparatus by the success or failure of short-range communication with the other communication device by low-power radio unit are in close proximity. A communication device control method for performing wireless communication with another communication device,
Detecting whether the other communication device is in proximity,
When a request for establishing wireless communication with the other communication device is input in a state where proximity of the other communication device is detected, each transmission output is changed while changing a transmission output level to the other communication device. Determining the success or failure of establishment of wireless communication with the other communication device at a level, specifying a transmission output level capable of establishing wireless communication with the other communication device, and determining the transmission output level with the specified transmission output level Establish wireless communication with other communication devices ,
The identification information of the other communication device and the minimum transmission output level at which wireless communication can be established in a state where the other communication device is in close proximity are stored in association with each other,
When short-distance communication is performed with the other communication device and identification information is received from the other communication device, wireless communication with the other communication device is established at a transmission output level stored corresponding to the identification information. A control method for a communication apparatus.

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