JP2008131358A - Radio communication apparatus, radio communication system and radio communication method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio communication method or the like which judges whether a communication system coincides with a regulation to be limited in the indoors or the like or not and communicates according to the judgement. <P>SOLUTION: The radio communication method achieves a radio communication by two radio communication systems of a first radio communication system to achieve the radio communication in a first radio communication range and to achieve a data transfer at a first transfer speed and a second radio communication system to achieve the radio communication in a second radio communication range which is wider than the first radio communication range and to achieve the data transfer at a second transfer speed which is slower than the first transfer speed. The radio communication method estimates a distance to a radio communication station which achieves the radio communication by the first radio communication system, by means of the radio communication of the second radio communication system, conducts the radio communication by the first radio communication system for the second radio communication system in the case that the distance is estimated to be a very near distance, and conducts the radio communication of the second radio communication system continuously in the case that it is not estimated to be the very near distance. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a wireless communication device, a wireless communication system, and a wireless communication method, and more particularly to a wireless communication device, a wireless communication system, and a wireless communication method capable of short-range wireless communication such as Bluetooth (registered trademark).

  Recently, digital devices have been manufactured and spread, and communication between these digital devices has become easier. As a result, a technique of operation control using communication between digital devices is widely known.

  For example, in Patent Document 1, a communication method for performing high-speed communication in a narrow range is A, a communication method for performing low-speed communication in a wide range is B, and the operation status of one communication processing circuit is described as communication at that time. A technique for switching according to a method to be performed is disclosed.

In this method, first, a communication station capable of wireless communication with the communication method A is detected by transmitting and receiving a predetermined packet using the communication method B. Then, when it is determined that wireless communication is possible with the communication method A, the communication method B is switched to the communication method A to transfer a large amount of data.
JP 2004-201031 A

  However, the prior art of Patent Document 1 determines whether or not the communication method A conforms to a restriction such as that the communication method A is restricted indoors when it is determined that wireless communication is possible with the communication method A. There was a problem that it was not possible.

  The present invention has been made in view of the above circumstances, and determines whether or not the communication method is restricted indoors, and can perform communication according to the determination. It is an object to provide a system and a wireless communication method.

  In order to solve the above-described problem, the wireless communication apparatus of the present invention is capable of wireless communication in the first wireless communication range and wirelessly using the first wireless communication method capable of transferring data at the first transfer speed. A first wireless communication means for performing communication and a second transfer that is capable of wireless communication in a second wireless communication range that is wider than the first wireless communication range and that is slower than the first transfer speed. A second wireless communication means for performing wireless communication with a second wireless communication method capable of transferring data at a speed;

  The second wireless communication means transmits a predetermined packet wirelessly, and the second wireless communication means receives the packet, and estimates the distance to the partner wireless communication station from the reception status of the packet. If this distance can be estimated as a close distance, wireless communication is performed using the first wireless communication method. If the distance cannot be estimated as a close distance, wireless communication using the second wireless communication method is continuously performed. And a control means.

To do.

  According to the present invention, it is possible to obtain a wireless communication device, a wireless communication system, and a wireless communication method capable of determining whether or not a communication method is restricted indoors and performing communication according to the determination. Can do.

  Examples of the present invention will be described below.

A first embodiment of the present invention will be described with reference to FIGS.
<Information processing apparatus according to an embodiment of the present invention>
(Constitution)
FIG. 1 is an explanatory diagram showing an information processing apparatus and a mobile phone according to an embodiment of the present invention.
In FIG. 1, an information processing apparatus 1 is a wireless communication apparatus having a wireless communication function such as Bluetooth or wireless LAN, for example, and a portable device (such as a mobile phone 2) having a similar function (a kind of wireless communication apparatus). The identifier (ID) of the wireless communication terminal) is detected. The mobile phone 2 also detects the ID of the information processing apparatus 1 or the like.

  Next, the configuration of the information processing apparatus 1 according to the embodiment of the present invention will be described with reference to FIG. The information processing apparatus 1 includes a control unit 16 that controls the overall operation, a user interface unit 17 connected to the control unit 16, a battery unit 19, a power control unit 20 connected to the control unit 16 and the battery unit 19, An AC power input unit 21 connected to the other end of the power control unit 20 is included. Furthermore, the information processing apparatus 1 includes a first wireless communication method transmission / reception unit 27 such as a wireless LAN that communicates with an external information processing apparatus, an antenna 28 connected thereto, and a second wireless communication method transmission / reception such as Bluetooth. It has the part 29, the antenna 30 connected to this, the input part 31 connected to the control part 16, and the display part 32 which displays apparatus internal information, such as a control part. The mobile phone 2 has the same configuration, but in the mobile phone 2, the AC power input unit 21 is not permanently installed but is used for charging.

<First and second wireless communication systems>
(Specific example)
The first wireless communication system is, for example, UWB (Ultra Wide Band; IEEE 802.15 TG3a). UWB performs high-speed and short-range communication (about 10m), but it is very high, for example, 480Mbps when the communication distance is about 3m. Although the output power is weak, it uses a very wide frequency range of 3.1 to 10.6 GHz. Therefore, in Japan, UWB is indoors (master UWB is connected to AC power supply) because it has a large impact on existing wireless systems (broadcasting, aviation, weather radar, satellite, radio astronomy, amateur radio, mobile phones, etc.) It is limited to use.

  The second wireless communication system is not limited as long as it is restricted indoors. For example, the Bluetooth already described is mounted on a mobile phone, a PC, or the like. Bluetooth is a wireless communication that uses frequencies in the 2.4 to 2.48 GHz band, and the communication distance is around 10 to 100 m. The output power is about 1mW to 100mW, but since it does not use a broadband frequency like UWB, it is not regulated for outdoor use. The communication speed is 3 Mbps for EDR, but is usually 732 kbps.

  Bluetooth can search for nearby Bluetooth devices by access code. Next, it searches for what kind of service the searched Bluetooth device provides, establishes communication with the device providing the desired service, and communicates.

<AC power connection status>
(AC power connection)
If it is a device with only an AC power supply, it is determined that the device is connected to the AC power supply if it is turned on.
In the case of battery drive, the device can determine whether the AC adapter is connected, so if the AC adapter is connected, it can answer that it is connected to the AC power supply. However, if the AC adapter is not connected, answer that it is not connected to AC power.

<An example of an information processing apparatus according to an embodiment of the present invention>
The information processing apparatus 1 according to an embodiment of the present invention can take various forms such as a digital television, a personal computer, a hard disk recorder, an audio device, and a home appliance such as an air conditioner. Here, a hard disk recorder will be described as an example, and a configuration example will be described below.

  First, FIG. 3 is a block diagram showing an example of the configuration of a broadcast recording apparatus according to an embodiment of the present invention. The information processing apparatus 1 ′ in FIG. 3 has two types of disk drive units. First, it has an optical disk drive unit 119 that rotationally drives an optical disk D as a first medium, which is an information recording medium capable of constructing a video file, and executes reading and writing of information. In addition, it has a hard disk drive unit 118 that drives a hard disk as a second medium.

  Further, the information processing apparatus 1 ′ shown in FIG. 3 mainly includes an encoder unit 121 that constitutes a recording side, an MPEG decoder unit 123 that constitutes a reproduction side, and a control unit 130 that controls the operation of the apparatus body. . The control unit 130 is connected to each unit via a data bus to control the overall operation.

  The information processing apparatus 1 ′ includes an input-side selector 16 and an output-side selector 117. The input-side selector 116 includes a Bluetooth (registered trademark) wireless function, a communication unit 111 such as a LAN, and the like. A so-called satellite broadcast (BS / CS) tuner unit 112 and a so-called terrestrial tuner unit 113 are connected to output a signal to the encoder unit 121. The BS / CS tuner unit 112 is connected to a satellite antenna, and the terrestrial tuner unit 113 is connected to a terrestrial antenna. The communication unit 111 serves as a first and second wireless communication scheme transmission / reception unit and an antenna related thereto. Although the power control related portion is omitted, the control unit 130 is configured to be connected to an AC adapter so that it can be determined that power is being supplied.

  The information processing apparatus 1 ′ includes an encoder unit 121, a data editing unit 120 that receives an output from the encoder unit 121 and performs desired data processing such as data editing, and a hard disk drive unit 118 connected to the data editing unit 120. An optical disk drive unit 119 is provided.

  Further, the information processing apparatus 1 ′ includes an MPEG decoder unit 123 that receives and decodes signals from the hard disk drive unit 118 and the optical disc drive unit 119, an encoder unit 121, a buffer unit 122, an MPEG decoder unit 123, a multiplexing unit 128, It has a separation unit 129, a control unit 130, a reservation recording unit 142, a program table generation unit 143 that generates a reservation list and a program table image, a mobile phone control unit 134, and a portable device ID storage unit 135. These units are connected to the control unit 130 via a data bus.

The output of the selector unit 117 is supplied to the external device via an interface unit 27 that is connected to an external receiver 141 or communicates with the external device.
The information processing apparatus 1 ′ is connected to the control unit 130 via a data bus and has an operation unit 132 that receives a user operation or a remote control R operation. Here, the remote controller is capable of almost the same operation as the operation unit 132 provided in the main body of the information processing apparatus 1 ′, and includes recording / playback instructions, editing instructions, and instructions for the hard disk drive unit 118 and the optical disk drive unit 119, Various settings such as operation of the tuner and setting of scheduled recording can be performed.

<A mobile phone as an example of a mobile device that communicates with an information processing apparatus according to an embodiment of the present invention>
A mobile phone, which is an example of a mobile device that communicates with an information processing apparatus according to an embodiment of the present invention, will be described with reference to FIG. A mobile communication device M that is a mobile phone 2 includes a communication unit 200, an antenna 201, a duplexer 202, an RF reception gain variable amplifier 203, an RF band limiting filter 204, a frequency converter 205, and an IF band limiting filter. 206, IF reception gain variable amplifier 207, modulation / demodulation unit 208, IF transmission gain variable amplifier 211, frequency converter 212, RF band limiting filter 213, RF transmission gain variable amplifier 214, and power amplifier 215 An isolator 216, a vocoder 223, and a speaker 224. The communication unit 200 and the antenna 201 serve as first and second wireless communication scheme transmission / reception units and antennas related thereto.

  Furthermore, the mobile communication device M controls the overall operation and has a control unit 231 having a moving image content control function, a program reservation control function and the like, a communication function such as infrared communication and Bluetooth (registered trademark), I / F unit 232 having a connection function with an external memory, etc., an operation unit 233 having a plurality of switches, a display unit 234 for displaying operation information, photo images, etc., video content and program reservation A storage unit 235 that stores information and the like, an MPEG decoder / audio / video processing unit 236, and a mail processing unit 237 are connected to the control unit 231. The outputs of the MPEG decoder / audio / video processing unit 236 are connected to a display unit 234 and a speaker 224, respectively. Further, the control unit 231 supplies, for example, a Bluetooth (registered trademark) address, which is its own identifier, to the information processing apparatus 1 via the I / F unit 232 described above.

  The modulation / demodulation unit 208 includes, for example, an orthogonal demodulation unit 281, an A / D conversion unit 282, an information signal demodulation unit 283, and a decryption unit 292, and further encrypts a signal from the vocoder 223. An encryption unit 289, an information signal modulation unit 284, a D / A conversion unit 285, and an orthogonal modulation unit 286 are included. In this configuration, the signal demodulated by the orthogonal demodulator 281 is A / D converted by the A / D converter 282, demodulated by the signal demodulator 283, decoded by the decoder 292, and output. .

  In this configuration, the mobile communication apparatus M will be described with respect to reception processing. A forward link signal transmitted from a base station is received by an antenna 201, supplied to a receiver side circuit by a duplexer 202, and an RF reception gain variable amplifier. Amplified or attenuated by 203, unnecessary components are filtered by RF band limiting filter 204, frequency converted from RF band to IF band by frequency converter 205, unnecessary components are filtered by IF band limiting filter 206, and IF reception gain is variable. Amplified or attenuated by amplifier 207 and enters modulation / demodulation unit 208

To help.
The modulation / demodulation unit 208 includes, for example, an orthogonal demodulation unit 281, an A / D conversion unit 282, an information signal demodulation unit 283, an information signal modulation unit 284, a D / A conversion unit 285, and an orthogonal modulation unit 286. Is done.

  Here, it is preferable that the encryption unit 289 and the decryption unit 292 be encrypted and decrypted with the common encryption key information, and prevent unauthorized listening of the voice information that is called by the encryption process. It is. However, strictly speaking, it is only necessary that the encryption key information for encryption from the mobile communication unit on the transmission side and the key information for the decryption unit 292 on the reception side are common.

  The reception process of the mobile communication apparatus M having this configuration will be described below. According to the operation information given from the user operation unit 233 according to the display of the operation information on the display unit 234, according to the operation control of the control unit 231. The following operations are performed. That is, the signal demodulated by the quadrature demodulator 281 is A / D converted by the A / D converter 282, demodulated by the signal demodulator 283, further decoded by the decoder 292, and decoded as audio to the speaker 224. Is output.

  Further, the transmission processing of the mobile communication device M will be described below. Similarly, according to the operation information given from the user operation unit 233 according to the display of the operation information on the display unit 234, the control unit 231 The following operations are performed according to the operation control. That is, the reverse link signal transmitted from the mobile station is given by the vocoder 223, and is encrypted by the encryption unit 289. The encrypted encrypted signal is modulated and output by the information signal modulation unit 284, D / A converted by the D / A conversion unit 285, orthogonally modulated by the orthogonal modulation unit 286, and amplified by the IF transmission gain variable amplifier 211. Alternatively, the signal is attenuated, frequency-converted from the IF band to the RF band by the frequency converter 212, the unnecessary component is filtered by the RF band limiting filter 213, amplified or attenuated by the RF transmission gain variable amplifier 214, and amplified by the power amplifier 215. The signal is supplied to the antenna 201 by the duplexer 202 via the isolator 216 and transmitted to the space.

  In addition, by applying such transmission / reception processing, it becomes possible to connect to the Internet via the base station B, send / receive information to / from a desired server S by designating a URL, or e It is possible to use e-mail and the like.

FIG. 5 shows a format example of information transmitted / received between the above-mentioned devices. Here, a Bluetooth packet structure is shown as an example.
In a short-range wireless communication system such as Bluetooth, a device that is trying to establish a wireless connection first transmits a search message by wireless, and a device that is in the vicinity receives the response message and returns a response message. Wirelessly by the procedure of acquiring the address information (ID, etc.) of the device, sending a connection request message to the next device to be connected, and returning the connection permission message (if the device accepts the connection). Establish a connection.

  Here, there are three types of access codes: 1) channel access code, 2) device access code, and 3) inquiry access code. For communication after the connection is established, a channel access code and a device access code are used, and only devices participating in the connection receive messages. In addition, an inquiry access code is used in a search message when searching for a device to be connected wirelessly.

This is an access code shared by all devices, and all devices existing within the reach of the search message receive and return a response message.
FIG. 6 shows an example of a response sequence for inquiry processing performed for searching for another wireless communication device by short-range wireless communication. FIG. 6 shows the response relationship between the inquiry transmission side (Master) and the response side (Slave). A phase Tx301 for transmitting an inquiry and a phase Rx302 for receiving a response are defined. In the case of short-range wireless communication, each of the time intervals Tx301 and Rx302 is called a slot, and communication is performed in units of this. In the case of Bluetooth, one slot is defined as a width of 625 μsec.

  Hereinafter, Bluetooth will be described as an example. Master transmits two signals 303a and 304a during one slot of Tx301. That is, the inquiry processing is performed in units of half slots (312.5 μsec width) obtained by dividing one slot into two. During one half slot, an inquiry signal is generated for a certain frequency to search whether there is a wireless communication device using this frequency. The frequency here is called a channel. Therefore, it is possible to search for the presence of the wireless communication device for two channels during one slot.

  The response of Slave notifying existence to the inquiry 303a, 304a must be performed in the corresponding slot of the half slot. For example, the inquiry 303a is an inquiry response 303b received in the first half slot of the slot Rx302, and the inquiry 304a is an inquiry response 304b received in the latter half slot. Assume that the master transmits the inquiry 305 through a channel represented by f (k) in a certain half slot. The slave receives the inquiry 305 of the channel f (k) at 307, and transmits an inquiry response 308 after one slot, that is, 625 μsec, in order to respond to this inquiry. Then, the master receives this inquiry response as an inquiry response 309 in the first half slot of the Rx slot performed next to the previous Tx slot. Through the series of communications described above, the slave search for the channel f (k) performed by the master is completed.

  6 shows an example in which Slave responds to the inquiry of the master transmitted in the first half slot for the channel shown in FIG. 6, but FIG. 4 shows an example of the inquiry response to the inquiry transmitted in the second half slot. Is.

  FIG. 7 is an operation flow of the mobile phone according to the embodiment of the present invention. First, the user instructs a search request for the wireless communication device 1 by operating the user interface unit 17 of the wireless communication terminal 2 which is a mobile phone (S11). Here, the operation of the user interface unit 17 is an ID search of the wireless communication apparatus 1, but other instructions such as service search and service execution can be separately performed.

  The control unit 16 of the wireless communication terminal 2 issues a search request for the wireless communication device 1 near itself via the second wireless communication method transmitting / receiving unit 29 (S12). For example, when the second wireless communication method is Bluetooth, an Inquiry signal is issued. The inquiry signal modulated by the second wireless communication scheme transmission / reception unit 29 is transmitted via the antenna 30 of the wireless communication terminal 2. The wireless communication device 1 existing in the vicinity receives the Inquiry signal from the wireless communication terminal 2 via its own antenna for the second wireless communication method, and returns an Inquiry response to the wireless communication terminal 2.

  The wireless communication terminal 2 receives the inquiry response signal from the peripheral wireless communication device 1 via the antenna 30, demodulates it by the second wireless communication method transmission / reception unit 29, sends it to the control unit 16, and transmits the peripheral wireless communication device Get the ID of 1. The acquired ID is displayed on the display unit 102 (S13). If the ID cannot be obtained, the user moves the position while looking at the display, and again instructs step S11. Although not shown, if the user does not intend to give any more instructions, support is not performed and the flow ends.

  When the user knows the desired wireless communication device 1 and cannot find the ID, the user approaches the wireless communication device 1 and searches for the wireless communication device 1 again until the desired wireless communication device 1 ID is found.

When the ID of the wireless communication device 1 that can be or is desired is acquired, information on whether or not the wireless communication device 1 is connected to an AC power source is obtained (S14).
When the information that the wireless communication device 1 is connected to the AC power supply is correctly received, the wireless communication terminal 2 determines that it is indoors and communicates with the wireless communication device 1 using the first wireless communication method. Step S15 is performed to shift to a state of performing communication in the first wireless communication system (S15). If a failure occurs in the transition itself, it is preferable to return to the state where the original second wireless communication system can be performed although not shown.

  When the information that the wireless communication device 1 is connected to the AC power source cannot be received, the flow is ended while the second wireless communication method can be performed. In any case, if there is data to be communicated, communication is performed in each state.

  In the present invention, for example, a wireless communication device and a wireless communication terminal equipped with two types of wireless communication systems, the first wireless communication system is capable of indoor use with an extremely high communication speed, and the second wireless communication system is a communication Although the distance is short and the communication speed is low, it can be used indoors and outdoors. When the battery-operated wireless communication terminal communicates with the wireless communication device, the battery-operated wireless communication terminal first communicates with the wireless communication device using the second wireless communication method, and can obtain the power drive state of the wireless communication device. If the wireless communication device can be correctly acquired as being driven by an AC power source, the wireless communication terminal determines that it is indoor and performs communication using the first wireless method.

  That is, the first wireless communication method is used to estimate the distance from a communication station capable of wireless communication with the first wireless communication method, and after confirming that it is a close distance (same indoor), the first wireless communication method is used. Wireless communication is performed using the wireless communication method.

The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention.
Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements according to different embodiments may be appropriately combined.

Explanatory drawing which shows the information processing apparatus and mobile phone which concern on one Embodiment of this invention. The block diagram which shows an example of a structure of the information processing apparatus which concerns on one Embodiment of this invention. The block diagram which shows an example of a structure of the hard disk recorder which is an example of the information processing apparatus which concerns on one Embodiment of this invention. The block diagram which shows an example of a structure of the mobile telephone which is an example of the portable apparatus which the information processing apparatus which concerns on one Embodiment of this invention detects. The figure which shows the packet structure example of Bluetooth transmitted / received between apparatuses in embodiment of this invention. The figure which shows an example of the response sequence about the inquiry process by near field communication. The operation | movement flow of the mobile telephone which concerns on one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Information processing apparatus, 2 ... Mobile phone, 16 ... Control part, 17 ... User interface part, 18 ... Secondary power supply part, 19 ... Battery part, 20 ... Power supply control part, 21 ... AC power input part, 27 ... 1st DESCRIPTION OF SYMBOLS 1 wireless communication system transmission / reception part, 28 ... Antenna, 29 ... 2nd wireless communication system transmission / reception part, 30 ... Antenna, 31 ... Input part, 32 ... Display part.

Claims (12)

A first wireless communication method capable of wireless communication in a first wireless communication range and capable of transferring data at a first transfer rate;
A second radio capable of wireless communication in a second wireless communication range wider than the first wireless communication range and capable of transferring data at a second transfer speed lower than the first transfer speed. In a wireless communication method capable of wireless communication with two wireless communication methods, a communication method,
When the distance from the wireless communication station capable of wireless communication by the first wireless communication system is estimated by wireless communication of the second wireless communication system, and the distance can be estimated as the closest distance, the second wireless communication system A wireless communication method characterized by continuously performing wireless communication of the second wireless communication method when wireless communication is performed using the first wireless communication method instead of the communication method and it is not possible to estimate the close range. .   2. The wireless communication method according to claim 1, wherein information necessary for performing communication in the first wireless communication system is exchanged by a predetermined packet transmitted in the second wireless communication system.   The wireless communication method according to claim 1, wherein a method for estimating that the distance from the wireless communication station is a close distance is based on determining that the wireless communication station is indoors.   4. The wireless communication method according to claim 3, wherein the method of determining that the wireless communication station is indoors is based on determining that the wireless communication station is driven by an AC power source. A wireless communication system including a plurality of wireless communication stations, each wireless communication station being capable of wireless communication within a first wireless communication range and capable of transferring data at a first transfer rate A first wireless communication means for performing wireless communication in a first wireless communication system, wireless communication in a second wireless communication range wider than the first wireless communication range is possible, and the first transfer speed A second wireless communication means for performing wireless communication with a second wireless communication method capable of transferring data at a second transfer speed lower than the second transfer speed;
A predetermined packet is transmitted wirelessly by the second wireless communication means, and the packet is received by the second wireless communication means, and a distance from the other wireless communication station is estimated from the reception status of the packet. If this distance can be estimated as a close distance, wireless communication is performed using the first wireless communication method. If the distance cannot be estimated as a close distance, wireless communication using the second wireless communication method is continuously performed. And a wireless communication system.   The control means transmits the information necessary for communication by the first wireless communication method in a predetermined packet to be transmitted by the second wireless communication means, and is received by the second wireless communication means. 6. The wireless communication system according to claim 5, wherein information necessary for performing communication by the first wireless communication method is acquired by a packet. The wireless communication system according to claim 5, wherein
A wireless communication system comprising means for determining that the wireless communication station is in a room as a method of estimating the distance to the wireless communication station as a close distance. The wireless communication system according to claim 7, wherein
A wireless communication system comprising means for determining that the wireless communication station is driven by an AC power source as a method for determining that the wireless communication station is indoors. A first wireless communication means for performing wireless communication by a first wireless communication method capable of wireless communication in a first wireless communication range and capable of transferring data at a first transfer speed; and With a second wireless communication system capable of wireless communication in a second wireless communication range that is wider than the communication range and capable of transferring data at a second transfer speed that is lower than the first transfer speed. A second wireless communication means for performing wireless communication;
The second wireless communication means transmits a predetermined packet wirelessly, and the second wireless communication means receives the packet, and estimates the distance to the partner wireless communication station from the reception status of the packet. If this distance can be estimated as a close distance, wireless communication is performed using the first wireless communication method. If the distance cannot be estimated as a close distance, wireless communication using the second wireless communication method is continuously performed. A wireless communication device comprising a control means. The wireless communication device according to claim 9, wherein
The control means transmits the information necessary for communication by the first wireless communication method in a predetermined packet to be transmitted by the second wireless communication means, and is received by the second wireless communication means. A wireless communication apparatus that acquires information necessary for performing communication by the first wireless communication method using a packet. The wireless communication device according to claim 9, wherein
A wireless communication apparatus comprising: means for determining that the wireless communication station is in a room as a method for estimating a distance from the wireless communication station as a close distance. The wireless communication device according to claim 11, wherein
A wireless communication apparatus comprising: means for determining that the wireless communication station is driven by an AC power source as a method for determining that the wireless communication station is indoors.

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