JP2006157980A - Wireless communication system and wireless repeater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable data transmission/reception, by establishing a link between a plurality of wireless transceivers, even between the wireless transceivers in a distance longer than a transmission/reception available distance, in a wireless communication system comprising a plurality of wireless transceivers each of which prepares a list of wireless transceivers capable of communicating, for example, and transmits data to another wireless transceiver selected from the list. <P>SOLUTION: The system is provided with a wireless repeater 3 which, upon receiving data sent from a certain wireless transceiver 2 to another wireless transceiver 5, calls wireless transceivers near itself to prepare a list of wireless transceivers capable of communicating, if said other wireless transceiver 5 is listed, transmits the data to the wireless transceiver 5, and manages the transmission and reception of the data by the listed wireless transceivers 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a wireless communication system and a wireless relay device that transmit and receive data between wireless communication devices based on a data communication standard such as so-called Bluetooth.

  Conventionally, various standards for transmitting and receiving data between devices have been proposed and put into practical use. Under such circumstances, in recent years, a data communication standard called Bluetooth has been formed mainly for the purpose of wireless data communication between personal computers and peripheral devices such as mobile phones and PDAs. Based products are being commercialized. In addition, this standard is created on the assumption that the wireless communication device moves, and in this premise, the communication module is miniaturized, reduced in power consumption, and reduced in price.

  Therefore, in this standard, for example, a fixedly installed wireless communication device transmits a calling radio wave, and another wireless communication device that has received the response responds to form a list of wireless communication devices that can communicate. This list is stored in the wireless communication device that has transmitted the calling radio wave, and an identification number is added to the other wireless communication devices that have responded based on the list. Thereby, a link between two or more wireless communication devices is established.

  Then, the master wireless communication device that has made the call transmits / receives data to / from each wireless communication device listed in the list in time division multiplexing. Thereby, data can be transmitted and received between the wireless communication devices listed in the list including the master wireless communication device. A group of a plurality of wireless communication devices whose data transmission / reception is managed by this single master is called a piconet.

  In the data communication standard called Bluetooth, three classes are defined according to the output level of radio waves. Class 1 transmits data with radio waves with maximum output +20 dBm and minimum output 0 dBm, Class 2 transmits data with radio waves with maximum output +4 dBm and minimum output 0 dBm, and Class 3 transmits with radio waves with maximum output 0 dBm. Send data. In class 1, in order to transmit / receive data to / from class 2 or 3, a power control function for reducing the maximum output of radio waves to +4 dBm is essential.

  Incidentally, a class 1 wireless communication device can establish a link and transmit / receive data even if they are about 100 m apart. Further, Class 2 and Class 3 wireless communication devices can establish a link at a distance of about 10 m or less and transmit / receive data. The class 1 radio communication device reduces the output level based on this power control function, and establishes a link with the class 2 or 3 radio communication device in this state to transmit / receive data.

  However, considering that this Bluetooth-based data communication function is installed in a portable wireless communication device such as a mobile phone terminal, the output power of the radio wave used for data transmission / reception is too high in class 1, so the battery power Will be consumed directly. In particular, in recent mobile phone terminals having a web page browsing function, an e-mail transmission / reception function, a function for holding and reproducing incoming data such as a ringing melody, and a vibration function, power consumption and Standby power has increased, and in addition to this, it is practically impossible to incorporate a class 1 communication module.

  Further, in class 1, since it is necessary to incorporate the battery capacity and the power control function as power consumption increases, it is impossible to avoid an increase in the size of the terminal.

  Further, class 1 generally has a circuit configuration in which a data transmission / reception circuit corresponding to class 2 and an amplifier circuit are separately added to the output of the data transmission / reception circuit. Therefore, even if they are modularized (RFIC), the size inevitably increases. For this reason as well, the enlargement of the terminal cannot be avoided.

  For the above reasons, class 2 and 3 are generally adopted in portable wireless communication devices such as cellular phone terminals.

  Therefore, for example, even if a class 1 wireless communication device that transmits / receives data to / from this portable wireless communication device is prepared, if the distance between these wireless communication devices does not become 10 m or less, Since the radio wave transmitted from the type wireless communication device does not reach the class 1 wireless communication device, the link cannot be established, and data cannot be transmitted and received between them.

  As a result, when trying to communicate orders and other data with a mobile phone terminal in a store or department store that has a drive-through function that allows customers to order and purchase products without getting out of the car, an area with a radius of about 10 m A radio communication device must be installed every time.

  That is, even if one class 1 wireless communication device is installed in a store having a drive-through function and an attempt is made to transmit an order command or the like from the mobile phone terminal operated by the user who gets on the vehicle to the wireless communication device, Transmission cannot be made until the distance between the mobile phone terminal and the wireless communication device is 10 m or less. This means that it is possible to receive orders from only about two to three vehicles at the same time in terms of the size of the vehicle. Therefore, even if this wireless communication system is newly introduced, orders can be received only within the same range as when orders are received verbally using conventional speakers and microphones. For this reason, the waiting time at the place of receiving the goods is hardly reduced.

  Various ideas for extending the communicable distance of class 2 and class 3 wireless communication devices have also been proposed.

  For example, in the Bluetooth standard, as shown in FIG. 2, a radio communication device 52 belonging to a certain piconet 51 is accommodated in another piconet 53 and is shared by the plurality of piconets 51 and 53. By transmitting and receiving data via the wireless communication device 52 and the master wireless communication device 54 of each piconet, communication between the wireless communication devices 55 and 56 separated by 20 m or more becomes possible. Further, by providing the piconet 61 adjacent to the piconet 53, communication between the radio communication devices 55 and 62 separated by 20 m or more is possible by further passing through the master radio communication device 54 therein. By connecting the piconet in this way, data can be transmitted and received between wireless communication devices far away.

  However, when the communicable range is extended by using such a piconet daisy chain method, these master wireless communication devices 54 must be able to communicate with all the mobile phone terminals, and the mobile phone terminals Regardless of the presence or absence of this, this scatter net needs to be constructed, and eventually, a class 2 or 3 radio communication device must be installed every 10 m.

  In addition, for example, if the Bluetooth reception sensitivity standard is improved from -70 dBm to -90 dBm, even in the case of class 3 wireless communication devices, a link is established at a distance of about 100 m as in class 1, and data is established. Can be transmitted and received. However, the specification change that makes the receiver sensitivity standard stricter not only detracts from the aspect of the standard Bluetooth standard, but also requires the use of expensive devices, resulting in a low system cost. It will be a factor to prevent.

  Therefore, the present invention creates a list of other wireless communication devices that can communicate by calling up surrounding wireless communication devices, and transmits a plurality of wireless devices that transmit data to one other wireless communication device selected from this list. In a wireless communication system equipped with a communication device, even if these wireless communication devices are separated by a distance that allows data transmission / reception between them, a link is established between the plurality of wireless communication devices, thereby It is an object of the present invention to obtain a wireless communication system and a wireless repeater that can transmit and receive data with a plurality of wireless communication devices.

  According to another aspect of the present invention, in a wireless communication system including a plurality of wireless communication devices that cannot directly communicate with each other, a link is established between the plurality of wireless communication devices, thereby the plurality of wireless communication devices. An object of the present invention is to obtain a wireless communication system and a wireless repeater that enable data transmission / reception between devices.

  The wireless communication system according to the present invention can reproduce data from radio waves in a predetermined input level range, and can receive data with radio waves having a first output level that falls within the input level range when received within a predetermined distance range. The first radio transmitter can transmit data from radio waves in a predetermined input level range and the first output level radio waves, and the first radio transmitter can transmit data at a longer distance. A second wireless communication device that switches between radio waves of a second output level capable of reproducing the data, and data can be reproduced from the radio waves of a predetermined input level range, and the radio waves of the first output level and When the data can be transmitted by switching between the radio waves of the second output level and the data from any one of the wireless communication devices is received, the above 2 Create a list of wireless communication devices that can call and communicate with surrounding wireless communication devices at the output level of the radio wave so that the output level that responds to each can be identified, and between each wireless communication device listed on this list And a wireless repeater that transmits and receives data at each output level.

  In the wireless communication system according to the present invention, the wireless repeater periodically calls at the two output levels or any one of the output levels, and updates the list based on the call.

  In the wireless communication system according to the present invention, the first wireless communication device or the second wireless communication device creates a list of other wireless communication devices that can communicate by calling a surrounding wireless communication device. If the wireless communication device that is the data transmission destination is not included in the network and the wireless relay device is included, data is transmitted to the wireless relay device.

  In the wireless communication system according to the present invention, the first wireless communication device or the second wireless communication device calls or transmits data to the other wireless communication device that is a data transmission destination, and responds thereto. When it is determined that there is no data, data is transmitted to the wireless repeater.

  The wireless communication system according to the present invention can reproduce data from radio waves in a predetermined input level range, and can receive data with radio waves having a first output level that falls within the input level range when received within a predetermined distance range. The first radio transmitter can transmit data from radio waves in a predetermined input level range and the first output level radio waves, and the first radio transmitter can transmit data at a longer distance. The data transmitted and received between the second wireless communication device that transmits data by switching the second output level of the wireless signal that can be reproduced and the Taiichi wireless communication device is the first output level of the wireless signal. And a wireless repeater that transmits and receives data transmitted and received with the second wireless communication device using the second output level of radio waves.

  The wireless communication system according to the present invention creates a list of other wireless communication devices that can communicate by calling surrounding wireless communication devices, and transmits data to one other wireless communication device selected from this list. In a wireless communication system including a plurality of wireless communication devices, when data transmitted from a certain wireless communication device to a predetermined other wireless communication device is received, a list of wireless communication devices capable of calling and communicating with surrounding wireless communication devices And when the other wireless communication device is present in the list, the wireless communication device transmits the data to the wireless communication device and manages the transmission / reception of the data to / from the wireless communication device listed in the list. A repeater is provided.

  The wireless communication system according to the present invention receives data transmitted from a certain wireless communication device to a predetermined other wireless communication device in a wireless communication system including a plurality of wireless communication devices that cannot directly communicate with each other. In this case, a list of wireless communication devices that can communicate with each other by calling a surrounding wireless communication device is created, and if the other wireless communication device exists in the list, the data is transmitted to the wireless communication device. At the same time, a wireless relay device is provided that manages the transmission and reception of data to and from the wireless communication devices listed in the list.

  The wireless relay device according to the present invention is a wireless relay device that relays data transmitted and received between two or more wireless communication devices, and when data is received from any of the wireless communication devices, A list of wireless communication devices that can communicate by calling the wireless communication device is created, the above data is transmitted to one other wireless communication device selected from this list, and wireless communication listed in the list thereafter It manages data transmission and reception by the machine.

  The wireless relay device according to the present invention is a wireless relay device that relays data transmitted and received between two or more wireless communication devices, and outputs data when receiving data from any of the wireless communication devices. Create a list of wireless communication devices that can communicate by calling surrounding wireless communication devices with two or more different radio waves so that the output level to which each responds can be specified, and one other wireless communication selected from this list Data is transmitted at the output level specified to the machine, and thereafter, data is transmitted and received at the output level specified by the list with each wireless communication device listed. .

  In the wireless communication system and the wireless relay device according to the present invention, the wireless relay device creates a list of wireless communication devices that can communicate by calling a plurality of surrounding wireless communication devices in response to reception of data. Since data is transmitted to one selected other wireless communication device, even if these wireless communication devices are separated from each other by a distance that enables data transmission / reception between them, the plurality of wireless communication devices Data can be transmitted and received by establishing a link between them.

  Further, the wireless communication system and the wireless repeater according to another invention, the wireless repeater creates a list of wireless communication devices that can communicate by calling a plurality of surrounding wireless communication devices in response to data reception, Since data is transmitted to one other wireless communication device selected from this list, even if these wireless communication devices cannot directly communicate with each other, the plurality of wireless communication devices Can establish a link between and send and receive data.

  Hereinafter, a radio communication system and a radio repeater according to an embodiment of the present invention will be described with reference to the drawings.

Embodiment 1 FIG.

  FIG. 1 is a system configuration diagram showing an overall configuration of a radio communication system 8 according to Embodiment 1 of the present invention.

  This wireless communication system 8 is based on a mobile phone terminal 2 as a first wireless communication device owned by a user who is on the vehicle 1, a wireless relay device 3 installed in the vehicle 1, and a drive-through method. And a fixed wireless communication terminal 5 as a second wireless communication device installed in a store 4 capable of selling products. The fixed wireless communication terminal 5 is connected to the order receiving computer 6 installed in the store 4 via the LAN 7. In the following, the mobile phone terminal 2, the wireless relay device 3, and the fixed wireless communication terminal 5 are collectively referred to as a wireless communication device.

  The cellular phone terminal 2 has a data transmission / reception function based on a so-called Bluetooth standard in addition to a data and voice transmission / reception function via a normal carrier.

  The standard called Bluetooth is a data transmission / reception standard at a short distance using radio waves of the IMS band (2.4 GHz band). In this standard, wireless communication devices are classified into three classes based on the output class of radio waves used for data transmission / reception. The class 1 wireless communication device has a maximum radio wave output class of +20 dBm (minimum 0 dBm), the class 2 wireless communication device has a maximum radio wave output class of +4 dBm (minimum -6 dBm), and the class 3 wireless communication device The maximum radio wave output class is 0 dBm. Further, in a class 1 wireless communication device, a power control function for lowering the output level to class 2 or lower is essential.

  Data can be communicated with each other even if the wireless communication devices of class 1 are approximately 100 m apart and the wireless communication devices of class 2 or 3 are approximately 10 m apart. On the other hand, radio communication devices with different classes have different radio wave output levels for each class, so even if the transmission data of one wireless communication device can be received correctly by the other wireless communication device, One wireless communication device cannot receive the transmission data of the communication device accurately. As a result, so-called bidirectional data transmission / reception cannot be performed. Therefore, in the class 1 wireless communication device, the power control function is essential for communication with the class 2 and 3 wireless communication devices.

  In the first embodiment, the fixed wireless communication terminal 5 is a wireless communication device that transmits and receives data using radio waves compliant with class 1, and the mobile phone terminal 2 transmits data using radio waves compliant with class 2 or 3. It is a wireless communication device that transmits and receives.

  The fixed wireless communication terminal 5 has a data transmission / reception function based on a standard called Bluetooth. For example, the fixed wireless communication terminal 5 transmits a list of products for sale in response to reception of a page transmission request from the mobile phone terminal 2, and products for this list. Is received and output to the order receiving computer 6.

  Further, wireless communication devices based on these Bluetooth standards are in a standby state (low power consumption standby state) until data to be transmitted is generated in order to reduce power consumption. When data to be transmitted is generated in a state where a link for transmitting and receiving data is not established, the wireless communication device first calls a surrounding wireless communication device, and displays a list of wireless communication devices that responded to it. create. Then, according to this list, data is transmitted and received in order with each wireless communication device by the time division multiplexing method. Each wireless communication device is given a unique identification number after the list is created, and each wireless communication device determines data addressed to itself from other data based on this identification number. In other words, data transmission / reception based on the Bluetooth standard is data transmission / reception control by a master-slave system in which the link activation side is a master and the linked side is a slave.

  On the other hand, after such a piconet link is established, each wireless communication device on the list becomes each slave wireless communication device under the control of the master wireless communication device. And data communication with the master wireless communication device.

  In addition, even if the wireless communication device is capable of data communication under the control of a predetermined wireless communication device as described above, when a call from a wireless communication device different from that is received, Even respond. As a result, one wireless communication device can transmit and receive data under the control of a plurality of wireless communication devices, and even wireless communication devices that cannot directly communicate with each other belong to the two piconets. Data can be transmitted and received via a communication device.

  When the wireless repeater 3 receives data, the wireless repeater 3 first calls a surrounding wireless communication device using a class 1 and class 2 or class 1 and class 3 output class radio wave to communicate with the wireless communication device. Create a list that identifies the output class to which each responds. Next, the wireless relay device 3 transmits the data to another wireless communication device selected from this list. The wireless relay device 3 transmits / receives data to / from each wireless communication device listed.

  Further, the wireless repeater 3 periodically calls in class 1 and class 2, or class 1 and class 3, and updates the list based on this. This list is also transmitted to the fixed wireless communication terminal 5. Therefore, for example, when the distance between the wireless repeater 3 and the fixed wireless communication terminal 5 approaches 10 m or less, the wireless repeater 3 and the fixed wireless communication terminal 5 switch their output levels to class 2 or class 3, respectively. Transmission and reception can be continued.

  Next, the overall operation of the wireless communication system 8 will be described.

With the vehicle 1 approaching within approximately 100 m from the fixed wireless communication terminal 5, the user activates the Bluetooth communication function of the mobile phone terminal 2. The cellular phone terminal 2 transmits a class 2 calling radio wave based on this activation. At this distance, the calling radio wave transmitted from the mobile phone terminal 2 does not reach the fixed wireless communication terminal 5 because its power is weak. On the other hand, the radio repeater 3 installed in the vehicle 1 receives the calling radio wave and responds thereto.
Note that a link may be automatically established between the mobile phone terminal 2 and the wireless relay device 3 when the power of the mobile phone terminal 2 is turned on.

  The mobile phone terminal 2 receives the response from the wireless relay device 3 and registers it in the list. Further, an identification number unique to the wireless relay device 3 is issued and transmitted to the wireless relay device 3. As a result, a class 2 piconet with the mobile phone terminal 2 as a master and the wireless relay device 3 as a slave is established.

  If there are other wireless communication devices in this piconet, the other wireless communication devices are also added to the list, and the mobile phone terminal 2 serving as the master has the plurality of wireless communication devices including the wireless relay device 3. Data is transmitted and received in order with each of the machines by time division multiplexing.

  When the user operates the mobile phone terminal 2 and inputs an order command for the store 4 in a state where control of data transmission / reception based on such a one-to-many link is performed, the mobile phone terminal 2 enters the list. Based on this, it is confirmed that it cannot be transmitted directly to the fixed wireless communication terminal 5, and the order command is transmitted to the wireless repeater 3.

  In response to receiving this order command, the wireless relay device 3 uses the master-slave switch function to re-establish the link so that the wireless relay device 3 becomes a master and the other wireless relay devices become slaves. That is, the wireless relay device 3 first transmits a calling radio wave using one of the two classes, and then transmits the calling radio wave using the other class after a predetermined time. The mobile phone terminal 2 receives the class 2 or class 3 calling radio wave and responds thereto. The fixed wireless communication terminal 5 also receives the class 1 calling radio wave and responds thereto. The wireless relay device 3 generates a list of wireless communication devices that can communicate with each other, including the mobile phone terminal 2 and the fixed wireless communication terminal 5. Further, in this list, the output level of the calling radio wave responded for each wireless communication device is stored in association with each other.

  As a result, a piconet having the wireless repeater 3 as a master and the mobile phone terminal 2 and the fixed wireless communication terminal 5 as slaves is newly established. Before and after the establishment of this new link, for example, by stopping the calling of another wireless communication device by the mobile phone terminal 2, the piconet with the mobile phone terminal 2 as a master is discarded. Also good.

  Thereafter, the wireless relay device 3 transmits / receives data to / from each wireless communication device registered in the list in time division multiplexing. When transmitting / receiving data to / from the fixed wireless communication terminal 5, first, the power control function is used to set the transmission power of class 1, and the order command is transmitted using the class 1 output radio wave.

  Further, when receiving a response page from the fixed wireless communication terminal 5, the wireless repeater 3 uses the power control function to reduce the output level to class 2 or class 3 before performing transmission with the mobile phone terminal 2. Then, this is transmitted to the mobile phone terminal 2. Thereafter, transmission / reception of data between the fixed wireless communication terminal 5 and the mobile phone terminal 2 is performed under the time division multiplexing control of the wireless repeater 3 and using a predetermined class corresponding to the wireless repeater 3. Executed via.

  As a result, when order data for a predetermined product is transmitted from the mobile phone terminal 2 to the fixed wireless communication terminal 5, the fixed wireless communication terminal 5 outputs this to the order receiving computer 6. In the store 4, the product is prepared for sale based on the order list displayed on the order receiving computer 6. On the other hand, when the user arrives at the store 4, the user can receive the product immediately. As a result, orders can be efficiently processed. Further, the user can receive the product without waiting at the product receiving place.

  Even if the vehicle 1 approaches the store 4 and the distance between the wireless repeater 3 and the fixed wireless communication terminal 5 becomes 10 m or less, data transmission / reception between the mobile phone terminal 2 and the fixed wireless communication terminal 5 is continued. If so, the fixed wireless communication terminal 5 responds to the class 2 or class 3 calling radio wave from the wireless repeater 3. In such a case, the output level of the fixed wireless communication terminal 5 registered in the list of the wireless relay device 3 is changed from class 1 to class 2, and thereafter, the wireless relay device 3 and the fixed wireless communication terminal 5 Transmits and receives data on Class 2 radio waves.

  Moreover, after the vehicle 1 approaches the store 4 so that the distance between the mobile phone terminal 2 and the fixed wireless communication terminal 5 becomes 10 m or less, for example, when other vehicles are waiting for drive through a little, When the user operates the mobile phone terminal 2, the fixed wireless communication terminal 5 directly responds to the class 2 or class 3 calling radio wave from the mobile phone terminal 2. In such a case, the data is transferred between the mobile phone terminal 2 serving as the master and the fixed wireless communication terminal 5 serving as the slave, without passing through the wireless relay device 3, with the piconet having the mobile phone terminal 2 as the master. Send and receive.

  Thus, based on the list, the wireless relay device 3 that transmits / receives data to / from the mobile phone terminal 2 using class 2 radio waves and transmits / receives data to / from the fixed wireless communication terminal 5 using class 1 radio waves is provided to By providing it near the terminal 2, the conventional problems can be solved. In other words, the mobile phone terminal 2 that was originally capable of two-way communication only with a class 2 radio wave, that is, a distance of 10 m or less, and a class 1 radio wave, that is, bidirectional only with a distance of 100 m or less. The fixed wireless communication terminal 5 that has not been able to communicate can establish a bidirectional communication link at a communication distance of about 100 m, which is the reach of Class 1 radio waves, and can transmit and receive data. Data from a wireless communication device that transmits radio waves of an output level that can reach only a short distance can be transmitted to a longer distance than that.

  In addition, since the mobile phone terminal 2 only needs to transmit and receive class 2 radio waves, for example, when the mobile phone terminal 2 is equipped with a class 1 transceiver, waste of battery power and an increase in the size of the mobile phone terminal 5 are reduced. The user-friendliness of the mobile phone terminal 2 that is comparable to the conventional one can be maintained.

  Further, since the wireless repeater 3 operates to form a class 1 piconet for the first time when data is received, the mobile phone terminal 2 and the fixed wireless communication terminal 5 directly transmit and receive data, and the wireless repeater 3 By preventing the data from being transmitted to the network, the communication is not adversely affected.

  In particular, the wireless relay device 3 selects a wireless communication device that is a data transmission destination based on a list and transmits / receives data to / from the wireless communication device 3 as in this embodiment. The wireless repeater 3 can be incorporated into the wireless network of the wireless communication system without disturbing the formation of the master-slave type piconet for one-to-many communication.

  Further, since the wireless repeater 3 itself has only a data transmission / reception function by Bluetooth, it can be downsized at a lower cost than the case where it is integrated with the mobile phone terminal 5, and an increase in power consumption is suppressed. And can be driven by a small battery. As a result, the wireless repeater 3 can be incorporated into a part of a car audio device or the like so that it can be mounted on the vehicle 1 or carried without being conscious of the user's bag.

  In particular, when the wireless repeater 3 that transmits radio waves at the output level of class 1 is provided separately from the mobile phone terminal 2 possessed by the user, it is particularly useful when the wireless relay device 3 is used at a short distance from the human body. For example, a class 1 wireless communication device that outputs an IMF band radio wave that may cause damage to the human body can be moved away from a human body, for example, to about 10 m.

  Further, since the wireless repeater 3 periodically calls at the two output levels and updates the list based on responses to the two output levels, for example, the distance between the wireless repeater 3 and the fixed wireless communication terminal 5 is 10 m. Even if it changes from the above to the following, the radio wave output level can be appropriately switched from class 1 to class 2 or 3 accordingly. The reverse is also possible. Therefore, the cellular phone terminal 2 and the fixed wireless communication terminal 5 can bidirectionally communicate data regardless of changes in the communication distance.

  The above embodiment is a preferred embodiment of the present invention, but various modifications can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the mobile phone terminal 2 determines that the fixed wireless communication terminal 5 is absent in the piconet having the mobile phone terminal 2 as a master based on the list and Data is transmitted, but first, data is transmitted from the mobile phone terminal 2 to the fixed wireless communication terminal 5, and after determining that there is no response to this, the same data is transmitted to the wireless repeater 3. Also good.

  As in the above-described embodiment, when the absence of the fixed wireless communication terminal 5 is confirmed based on the list, more reliable data transmission is performed directly than when data is transmitted to the fixed wireless communication terminal 5 for trial. It is possible to expect to receive a page from the fixed wireless communication terminal 5 with a stable response time. On the other hand, in the latter case, after the calling radio wave is transmitted, if the distance between the mobile phone terminal 2 and the fixed wireless communication terminal 5 is 10 m or less, the data is transmitted without starting the wireless repeater 3. Has the advantage that

  Further, in the above embodiment, by installing the wireless repeater 3 in the vehicle 1, the class 1 fixed wireless communication terminal 5 installed in the store 4 capable of drive-through and the class 2 or 3 used by the user. Although the case where data transmission / reception with the mobile phone terminal 2 is enabled is taken as an example, the present invention can also be applied to other cases. For example, a class 1 fixed wireless communication terminal 5 is arranged in the center of a department store floor, and a wireless repeater 3 is carried in a bag of a user having a mobile phone terminal 2 to thereby fix the fixed wireless communication terminal 5 to 10 m. Even at a position far away from the above, data can be transmitted / received to / from the fixed wireless communication terminal 5 using the class 2 or 3 cellular phone terminal 2.

  Further, a class 2 or class 3 mobile phone terminal possessed by a store clerk may be arranged near the fixed wireless communication terminal 5, or the LAN may be wireless instead of wired. In addition, the fixed wireless communication terminal 5 has a function of switching a plurality of output levels from class 1 and class 2 or 3, but may have an output level of only class 1. In this case, it is preferable that a class 2 or 3 mobile phone terminal capable of communicating with the mobile phone terminal 2 is arranged in the store 4 when the use of the person approaches.

  In the above embodiment, both the wireless repeater 3 and the fixed wireless communication terminal 5 are capable of switching a plurality of output levels, but they may be switched simultaneously instead of being switched. Further, the output level may be three or more.

  The present invention can be suitably used in a wireless communication system and a wireless repeater using a data communication standard such as Bluetooth.

1 is a system configuration diagram showing an overall configuration of a radio communication system according to Embodiment 1 of the present invention. It is explanatory drawing of the scatter net prescribed | regulated to what is called a Bluetooth specification.

Explanation of symbols

1 Vehicle 2 Mobile phone terminal (wireless communication device, first wireless communication device)
3 Wireless repeater (wireless communication device)
4 stores 5 fixed wireless communication terminals (wireless communication device, second wireless communication device)
6 Order-receiving computer 7 LAN
8 Wireless communication system

Claims (4)

Wireless communication including a plurality of wireless communication devices that create a list of other wireless communication devices that can communicate by calling surrounding wireless communication devices, and transmit data to one other wireless communication device selected from this list In the system,
When data transmitted from a certain wireless communication device to a predetermined other wireless communication device is received, a list of wireless communication devices that can communicate by calling surrounding wireless communication devices is created, and the other wireless communication device is included in this list. Wireless communication characterized in that, when a communication device exists, the wireless communication device is provided with the wireless relay device that transmits the data to the wireless communication device and manages transmission / reception of data to / from the wireless communication devices listed in the list system. In a wireless communication system comprising a plurality of wireless communication devices that cannot directly communicate with each other,
When data sent from a certain wireless communication device to a predetermined other wireless communication device is received, a list of wireless communication devices capable of communicating by calling surrounding wireless communication devices is created, and the other wireless communication device is included in this list. Wireless communication characterized in that, when a communication device exists, the wireless communication device is provided with a wireless relay device that transmits the data to the wireless communication device and manages transmission / reception of data to / from the wireless communication devices listed in the list. system. A wireless relay device that relays data transmitted and received between two or more wireless communication devices,
When data is received from any one of the wireless communication devices, a list of wireless communication devices that can communicate by calling surrounding wireless communication devices is created, and the above-described one wireless communication device selected from this list is described above. A wireless relay device that transmits data and manages transmission and reception of data by wireless communication devices listed in a list thereafter. A wireless relay device that relays data transmitted and received between two or more wireless communication devices,
When data is received from any one of the wireless communication devices, it is possible to specify the output level at which each responds to a list of wireless communication devices that can call and communicate with surrounding wireless communication devices using two or more radio waves having different output levels. The data is transmitted at the output level specified for one other wireless communication device selected from the list, and thereafter, each wireless communication device listed in the list and the list are transmitted. A wireless repeater that transmits and receives data at the output level specified by the above.

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