JP4335472B2 - Wireless transceiver - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wireless transmission / reception apparatus that configures a wireless communication network, establishes a wireless communication link in the wireless communication network, and transmits signals via the wireless communication link.
[0002]
[Prior art]
A so-called Bluetooth wireless communication system is generally known as a system in which a plurality of wireless communication devices constitute one wireless communication network and a communication link is established within the wireless communication network to transmit and receive signals. .
A Bluetooth (hereinafter simply referred to as “BT”) wireless communication system is a very weak 2.4 GHz band radio wave between terminals such as a mobile phone and a notebook computer, or a stereo device and headphones, which are placed at a very short distance. The wireless communication link is used to wirelessly transmit signals such as data and voice.
[0003]
In the BT system, a so-called point-to-one relationship between information terminal devices (hereinafter simply referred to as “BT devices”) incorporating a module that satisfies the BT specification standards (hereinafter simply referred to as “BT modules”) — In some cases, signal transmission of points is performed, but in general, a plurality of BT devices often constitute one network and perform signal transmission in the network. In the BT system, such a one-to-n so-called point-multipoint signal transmission network is referred to as a piconet.
[0004]
One piconet can include up to eight BT devices, one of which is called a “master”, and the other BT device is called a “slave”. The master controls the formation of the BT wireless communication link in the piconet and other communication procedures, and each slave can transmit signals only to the master.
[0005]
Both the master and slave functions are not functions fixed to the BT module built in each BT device, but each BT module has both of these functions, and both functions as necessary. It is possible to use properly. However, there is always only one master in one piconet.
In the signal transmission procedure between the master and the slave, first, a wireless communication link based on the BT specification is formed between both BT modules, and subsequently, the signal is transmitted via the wireless communication link. Signal transmission between the BT modules is performed by using a time slot (625 μS) on the time axis as a unit and using the time slots by time-sharing each other. That is, the signal transmission between the master and the slave employs a TDD (Time Division Duplexing) method which is a kind of half-duplex communication in which transmission and reception are performed mutually. Incidentally, the maximum communication speed between BT modules with established wireless communication links is 1 Mbps.
[0006]
Further, a frequency hopping type spread spectrum system is adopted as a modulation system in the BT wireless communication system. Such a modulation method is a method of switching the carrier frequency of the normal narrowband modulation method in a short time, and this frequency switching is called frequency hopping. The BT wireless communication system has 79 hopping frequencies at 1 MHz intervals in the 2.4 GHz band. Further, since frequency hopping is performed every time slot (625 μS) described above, frequency hopping is performed 1600 times per second.
[0007]
Note that the order of frequency hopping using what frequency and in what order is called a hopping pattern, and is determined from a BT device address corresponding to an identification number unique to each BT device and a clock value used by each BT device. It is calculated based on the procedure. Naturally, in order for the master and the slave to transmit data to each other, it is necessary to use the same hopping pattern. Therefore, in order for the BT device in the piconet to establish a wireless communication link, it is necessary to know the BT device address and clock value of the counterpart device. For this reason, an “inquiry” or “call” (to be described later) ( In the communication processing procedure such as “Page”, each BT device exchanges such information.
[0008]
On the other hand, a BT device serving as a master in a piconet can always communicate with only one BT device serving as a slave. Therefore, when the master communicates with a plurality of slaves, the master needs to establish a BT wireless communication link in a time division manner for each slave that performs communication.
That is, in order to establish a new BT wireless communication link, the master needs to execute a communication processing procedure such as “calling” within the piconet each time. In addition, in order for the master to grasp the BT device in the piconet, it is necessary to perform a communication processing procedure such as “inquiry” (details of these various communication processing procedures will be described later).
[0009]
Therefore, when it is necessary to communicate with other BT devices during signal transmission between specific BT devices, the communication for establishing the communication link is established between the transmission processing currently being performed. A processing procedure needs to be executed. As a result, the transmission processing efficiency between specific BT devices decreases.
In other words, in the piconet, for example, the master uses time-shared resources corresponding to a maximum of 1 Mbps. For this reason, if communication processing procedures such as “inquiry” and “calling” for other BT devices are required during communication with one slave, the data rate of the original communication processing is reduced. Become.
[0010]
[Problems to be solved by the invention]
The present invention has been made to solve such a problem. Even when processing such as “inquiry” and “calling” in the piconet is performed, the data rate of the transmission signal is hardly reduced, and wireless communication using a BT module is performed. It is an object to provide a transmission / reception device.
[0011]
[Means for Solving the Problems]
The present invention is a wireless transmission / reception apparatus that manages a communication procedure between a plurality of wireless communication devices constituting a wireless communication network and performs a signal transmission process with the plurality of wireless communication devices, wherein the plurality of wireless communication devices Among the communication devices, a first wireless transmission / reception unit that performs signal transmission processing with a wireless communication device with which a wireless communication link for signal transmission is established is mutually established, and the wireless communication link is mutually established. A second wireless transmission / reception unit that performs preparatory procedure processing until a wireless communication link is established with another wireless communication device other than the wireless communication device being connected. The wireless communication network is a wireless communication network based on a Bluetooth wireless system, and each of the first wireless transmission / reception unit and the second wireless transmission / reception unit uses a separate Bluetooth module. The Bluetooth module used in each of the wireless transmission / reception unit and the second wireless transmission / reception unit has different Bluetooth device addresses, and the Bluetooth module of the second wireless transmission / reception unit according to a predetermined control signal A function of taking in the Bluetooth device address of the first wireless transmission / reception unit and setting it as its own Bluetooth device address, and the Bluetooth module of the first wireless transmission / reception unit, the Bluetooth of the second wireless transmission / reception unit・ Get your device address and make your own Bluetooth The function used as a device address, and the Bluetooth module used in each of the first wireless transmission / reception unit and the second wireless transmission / reception unit captures a predetermined predetermined Bluetooth device address, and the own Bluetooth device address. And at least one of the functions It is characterized by that.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
A first embodiment of a wireless transmission / reception apparatus according to the present invention is shown in the block diagram of FIG.
In FIG. 1, when the BT device 10 functions as a master, it manages the communication processing procedure of the entire piconet shown in FIG. 1, and is a main module 11 which is a general-purpose module of the BT, and is also a general-purpose module of the BT. It consists of a submodule 12 and an information terminal device 13.
[0013]
The main module 11 and the sub module 12 each satisfy the BT standards and specifications. Note that the names “main” and “sub” are given for convenience in the description of the present embodiment. That is, both modules have the same physical structure, and both modules are general-purpose BT wireless communication modules that satisfy the BT specification.
[0014]
It is assumed that the same BT device address is set in the main module 11 and the submodule 12.
However, the two modules differ from each other in application programs that are located above the BT protocol stack in each module. Incidentally, the BT protocol stack supports a communication processing procedure when a BT module is connected to another BT module in a multilayer structure.
[0015]
In other words, the main module 11 includes software that performs signal transmission processing exclusively between the BT device 10 and a BT module built in another BT device that has established a BT wireless communication link within the piconet. It is structured as a program.
On the other hand, the sub-module 12 specializes in communication processing procedures such as “inquiry” and “calling” required when setting up a BT wireless communication link with other BT devices built in the BT device in the piconet. Such software is configured as an application program.
[0016]
It is assumed that the main module 11 and the sub module 12 are connected in so-called baseband layer and / or link management layer in each BT protocol stack.
The information terminal device 13 is an information terminal device that is directly operated by a user such as a notebook personal computer or a stereo device, and is connected to the main module 11 via an application program that is positioned above the BT protocol stack of the main module 11. Has been.
[0017]
In the piconet shown in FIG. 1, there are BT devices 20 and 30 in addition to the BT device 10. These BT devices establish a BT wireless communication link with the BT device 10 and transmit signals via the communication link. The description of the BT module built in the BT devices 20 and 30 and the description of various information terminal devices connected to the BT module are omitted. For example, when the BT device 10 is a notebook computer, a printer And a modem or the like correspond to information terminal devices such as the BT devices 20 and 30, and when the BT device 10 is an AV apparatus such as a stereo or a digital television, a speaker system or a display corresponds to these.
[0018]
Further, the configuration of the BT devices 20 and 30 and the like may be configured to include two BT modules, a main module and a sub module, as in the BT device 10, or one BT module as in a general BT device. It is good also as a structure which comprises only.
Next, the operation based on the first embodiment will be described based on the flowcharts shown in FIGS.
[0019]
First, the “inquiry” process by the BT device 10 in the piconet of FIG. 1 will be described.
Incidentally, the “inquiry” process is a process performed when the master BT device does not know what other BT devices exist in the piconet. That is, the “inquiry” process is executed when the master continuously transmits a predetermined broadcast packet within the communication range of its own device, and the slave that has received it returns unique information about the own device to the master. .
[0020]
The operation of the submodule 12 in the “inquiry” process will be described based on the flowchart of FIG. The processing operation shown in the flowchart is started when the main module 11 issues a request for “inquiry” processing to the submodule 12.
First, the submodule 12 executes “inquiry” processing in the piconet shown in FIG.
[0021]
That is, the submodule 12 becomes a master in the piconet, and broadcasts an IQ (Inquiry) packet, which is a broadcast packet, in the piconet for a predetermined time in step 10. On the other hand, when another BT module in the piconet receives this IQ packet, it sends an FHS packet to the master to notify the master of information such as its BT device address and clock in order to clarify its attributes. To do.
[0022]
In step 11, the submodule 12 checks responses from other BT devices in the piconet. If a response is received, in the next step 12, information obtained from the response is notified to the main module 11, and the “inquiry” process is terminated. If no response is received, the “inquiry” process shown in the flowchart of FIG.
[0023]
Next, the operation of the “inquiry scanning” process of the submodule 12 in the first embodiment will be described based on the flowchart shown in FIG.
Incidentally, the “inquiry scan” process is an operation process that is performed in order that the slave BT device in the piconet receives the IQ packet transmitted by the master BT device in the “inquiry” process. That is, FIG. 3 shows an operation when the BT device 10 becomes a slave BT device in the piconet shown in FIG.
[0024]
The processing shown in the flowchart of FIG. 3 is started when the main module 11 issues a request for “inquiry scanning” processing to the submodule 12.
In step 20 of FIG. 3, first, the submodule 12 executes an “inquiry scanning” process. That is, the submodule 12 acts as a slave and attempts to receive an IQ packet broadcast by another BT device serving as a master in the piconet. Specifically, the submodule 12 frequency-hops the reception frequency at a very low speed compared to the frequency hopping speed of the IQ packet transmitted from the master, and determines the timing at which the IQ packet from the master can be received. Extract.
[0025]
The submodule 12 monitors whether or not a stop request for “inquiry scanning” processing has been received from the main module 11 at a predetermined timing while executing such processing (step 21).
That is, when the main module 11 does not respond to an “inquiry” from another BT device that has become a master in the piconet, it issues such a stop request to the submodule 12. In step 21, when the submodule 12 detects this, the process proceeds to step 22 to stop the “inquiry scanning” process shown in FIG.
[0026]
On the other hand, when a stop request has not been received from the main module 11, the process returns to step 30 and the submodule 12 repeats the “inquiry scanning” process.
Next, the operation of the “calling” process in the first embodiment will be described.
The “calling” (Page) processing is when the master recognizes a BT device in the vicinity of its own device by the above-mentioned “inquiry” processing and then joins a specific BT device as a slave in the piconet. This refers to the communication processing procedure to be performed.
[0027]
The operation of the submodule 12 in the “calling” process is shown in the flowchart of FIG. The processing in FIG. 4 is started when a processing request is issued from the main module 11 as in the case of the “inquiry” and “inquiry scanning” processing shown in FIGS.
In step 30 of FIG. 4, the submodule 12 executes “calling” processing based on the information from the main module 11. That is, the submodule 12 transmits ID packets to a specific BT device that is the target of “calling” in the piconet, and executes a process of receiving reception confirmation for the ID packets from the partner BT device.
[0028]
In the next step 31, the submodule 12 determines whether to end the “calling” process. This is to determine whether or not an instruction to end the “calling” process has been received from the main module 11. If the end instruction has been received, the sub-module 12 ends the “calling” process.
If the “calling” process is not terminated, the process proceeds to step 32 to determine whether or not there is a response from the partner BT device of the “calling” process. If there is a response from the counterpart device, in step 33, the response result from the counterpart device is notified to the main module 11 and the calling process is terminated.
[0029]
On the other hand, if there is no response from the counterpart device in step 32, the submodule 12 returns to step 30 and repeats the above-described “calling” process.
Next, the operation of the main module 11 in the “calling” process is shown in the flowchart of FIG. Incidentally, the processing of the main module 11 in FIG. 5 is performed in parallel with the “calling” processing in the submodule 12 shown in FIG. 4 described above.
[0030]
In step 40 of FIG. 5, first, the main module 11 requests the sub-module 12 for “calling” processing.
Next, the process proceeds to step 41 to determine whether or not to terminate the “calling” process. Such a determination may be made by a command sent from the information terminal device 13 via an application program, for example.
[0031]
When the main module 11 determines in step 41 that the “calling” process is to end, the main module 11 proceeds to step 42, notifies the submodule 12 that the “calling” process is to be ended, and ends the process shown in FIG. 5.
On the other hand, if it is determined in step 41 that the “calling” process is to be continued, the main module 11 proceeds to step 43 and determines whether or not the result of the “calling” process from the submodule 12 has been notified.
[0032]
When there is a notification from the submodule 12, that is, when there is a response from the BT device that is the target of the “calling” process to the submodule 12, the main module 11 sends a new response to the BT device that has responded. Determine whether communication processing is possible. If communication processing is possible, connection processing with the BT device that is the target of “calling” processing is executed in step 45.
[0033]
Next, the operation of “call scanning” processing in the first embodiment will be described.
“Page Scan” processing refers to a processing operation performed by a slave to receive an ID packet transmitted to call a specific slave. That is, the processing operation is performed when the BT device 10 shown in FIG. 1 becomes a slave device in the piconet.
[0034]
First, the operation of the submodule 12 in the “call scanning” process is shown in the flowchart of FIG. The processing in FIG. 6 is started by issuing a processing request from the main module 11 (in this case, a request for “call scanning” processing), as in the case of the processing in FIGS.
In step 50 of FIG. 6, the submodule 12 first performs a “call scanning” process. That is, the sub-module 12 extracts the timing at which the ID packet can be received by frequency hopping the reception frequency at a very low speed compared with the frequency hopping speed of the ID packet transmitted “calling” from the master.
[0035]
In the next step 51, the submodule 12 determines whether or not a processing stop request has been received from the main module 11. If a stop request has been received, the process proceeds to step 52 where the “call scanning” process is stopped and the process of FIG. 6 is terminated.
On the other hand, if no stop request has been received from the main module 11, the submodule 12 proceeds to step 53. Then, in the “call scanning” process of step 50, it is determined whether or not a connection request to the piconet from another BT device as a master has been received.
[0036]
If the connection request has been received, the sub-module 12 moves to step 54, notifies the received connection request to the main module 11, returns to step 50, and continues the “call scanning” process again. In step 53, if a connection request from another BT device as a master has not been received, the submodule 12 returns to step 50 without notifying the main module, and performs the “call scanning” process again. To continue.
[0037]
Next, the operation of the main module 11 in the “call scanning” process is shown in the flowchart of FIG. The process shown in FIG. 7 is performed in parallel with the “call scanning” process of the submodule 12 shown in FIG.
First, in step 60 of FIG. 7, the main module 11 requests the sub-module 12 for the “call scanning” process described above. Then, in the next step 61, it is determined whether or not to end such processing.
[0038]
For example, when a user gives an instruction to stop processing via the application program, the main module 11 issues a request to stop the “call scanning” process in step 62 to end the “call scanning” process. 12 and the processing of FIG.
On the other hand, when the “call scanning” process is continued, the process proceeds to step 63, where it is determined whether or not a connection request from the BT device as a master in the piconet is notified from the submodule 12.
[0039]
If a connection request notification has been received, the main module 11 determines in step 64 whether new communication processing is possible, that is, whether there is room to perform communication processing with a new BT device. If communication processing is possible, in step 65, a BT wireless communication link is connected to another BT device to be called.
After that, the main module 11 determines whether or not the connection process is completed in the next step 66. If the connection is completed, the main module 11 notifies the user that the connection is completed (step 67), and the connection is completed. The communication with the master BT device is started (step 68), and the processing shown in the flowchart of FIG. 7 is ended.
[0040]
On the other hand, in step 63, when the connection request from the other BT device is not notified from the submodule 12, the process returns to step 61 and the above-described processing is repeated. If the connection with the master BT device is not completed in step 66, the main module 11 notifies the user that the connection is impossible (step 69) and returns to step 61.
[0041]
Heretofore, the first embodiment based on the present invention has been described. In this embodiment, the submodule 12 in the BT device 10 exclusively performs the setting processing of the BT wireless communication link such as “inquiry” and “call” in the piconet. Therefore, when there is a BT device originally communicating in the piconet, the main module 11 can continue communication processing with the BT device at a data rate of 1 Mbps at the maximum.
[0042]
In the configuration of FIG. 1, the main module 11 and the sub module 12 are connected in the baseband layer of the BT protocol stack of each module to exchange information. However, this embodiment is limited to this. is not. For example, in the BT protocol stack of both modules, the connection may be made by an upper link management layer (not shown), or the connection may be made by both these two layers. Further, both modules may be connected via an application program located at the upper level of the BT protocol stack.
[0043]
In the configuration of FIG. 1, the BT device address of each of the main module 11 and the sub module 12 has been described as the same value. However, the present embodiment is not limited to this configuration. For example, in the initial state of the apparatus operation, each module has an individual BT device address, and each module operates as a normal BT module. By receiving a predetermined instruction from the main module 11, The sub module 12 may be configured to use the same BT device address as that of the main module 11.
[0044]
Further, the main module 11 may use the BT device address of the sub-module 12 according to a predetermined instruction, and both modules may use the same predetermined BT device address set in advance. .
Next, a second embodiment according to the present invention is shown in a block diagram of FIG.
In FIG. 8, the BT device 10 includes a main module 11, a sub module 12, an information terminal device 13, and a host CPU 14.
[0045]
The host CPU 14 is mainly composed of a memory element such as a microcomputer, ROM, and RAM, and controls the overall operation of the BT device 10. Note that the other components in the BT device 10 and the other BT devices 20 and 30 included in the piconet shown in FIG. 8 are the same as those in the first embodiment, and thus description thereof is omitted.
[0046]
The second embodiment is an embodiment in which the main module 11 and the sub module 12 which are two BT modules in the BT device 10 cannot directly transmit information in each BT protocol stack. Accordingly, the two BT modules and the host CPU transmit information via an application program that is configured at the upper level of the protocol stack of each module.
[0047]
Information transmission here refers to various proxy instructions and requests for processing operations performed from the main module 11 to the sub-module 12, and the proxy of the processing operations performed from the sub-module 12 to the main module 11. This is the transmission of the results.
Next, the processing operation of the host CPU 14 in the second embodiment will be described based on the flowcharts shown in FIGS.
[0048]
First, the operation of the host CPU 14 during the “inquiry” process will be described with reference to the flowchart of FIG.
9, the host CPU 14 instructs the submodule 12 to execute “inquiry” processing in the piconet. In response to this, the submodule 12 in the BT device 10 executes the “inquiry” process in the piconet described in the first embodiment.
[0049]
In the next step 71, the host CPU 14 receives a response from another BT device in the piconet via the submodule 12 and stores the obtained information in an internal memory element in step 72 to execute “inquiry”. End the process. In other words, the host CPU 14 makes the submodule 12 the master, executes the “inquiry” process, and checks whether there is another BT device around the BT device 10. If there is a response from another BT device, the information is stored and saved.
[0050]
Next, the operation of the host CPU 14 during the “inquiry scanning” process in the second embodiment will be described based on the flowchart of FIG.
In step 80 of FIG. 10, the host CPU 14 first sets the submodule 12 to the “inquiry scanning” mode. In the next step 81, the submodule 12 executes the “inquiry scanning” process described in the first embodiment, and responds to the inquiry from the master in the piconet.
[0051]
Next, the operation of the host CPU 14 during the “call scanning” process in the second embodiment will be described based on the flowchart of FIG.
First, in step 90 of FIG. 11, the host CPU 14 sets the sub-module 12 to the “call scanning” mode.
Then, in the next step 91, it is determined whether or not to end the “call scanning” process. For example, if there is a command to end the “call scanning” process from the information terminal device 13 via the application program, it is determined that the “call scanning” process is to be ended, and the process proceeds to step 92 to set the submodule 12. Release the “call scanning” process.
[0052]
On the other hand, when the “call scanning” process is not terminated in step 91, the process proceeds to step 93, and in the course of the “call scanning” process, it is determined whether the submodule 12 has received a connection request from the master in the piconet. .
If a connection request from the master has been received, the host CPU 14 proceeds to step 94 and temporarily rejects the connection request from the master via the submodule 12. In the present embodiment, the main module 11, not the submodule 12, is responsible for data transmission processing between the BT device 10 and other BT devices. For this reason, it is necessary to grasp the situation of the main module 11, and this measure is necessary.
[0053]
Thereafter, in step 95, the host CPU 14 determines whether or not the main module 11 can perform communication processing with the new BT device, that is, whether or not the main module 11 is currently communicating with other BT devices in the piconet. To do. If the communication process is possible, the process proceeds to step 96, and the main module 11 transmits a connection request for the BT device that has received the connection request in the “call scanning” process performed by the submodule 12.
[0054]
Thereafter, in step 97, when the main module 11 receives a response from the new BT device and enters the connection process with the BT device, the host CPU 14 determines whether or not the connection process is completed in the next step 98. Determine.
When the connection process is completed, the host CPU 14 notifies the user that the connection has been completed in step 99, and further, in step 100, starts the data communication process with the BT device by the main module 11, and FIG. The “call scanning” shown in FIG.
[0055]
On the other hand, if the submodule 12 has not received a connection request from another BT device in step 93, the process returns to step 91 to continue the “call scanning” process by the submodule 12.
In step 95, when the main module 11 is already communicating with another BT device in the piconet and communication with the new BT device is impossible, or in step 98, the main module 11 and the new BT device are in communication. If the connection process with the device has not been completed, the host CPU 14 proceeds to step 101. Then, in this “call scanning” process, the user is notified that connection with the master that issued the connection request is impossible, and the process returns to step 91.
[0056]
Heretofore, the second embodiment based on the present invention has been described. Also in this embodiment, the submodule 12 exclusively performs the setting process of the BT wireless communication link in the piconet as in the first embodiment described above. For this reason, in any of the processes described above, if there is a BT device originally communicating within the piconet, the main module 11 can continue communication processing with the BT device at a maximum data rate of 1 Mbps. It becomes.
[0057]
【The invention's effect】
In the present invention, in a wireless transmission / reception device that forms a wireless communication network with a plurality of devices, a wireless transmission / reception unit that establishes a wireless communication link and a wireless transmission / reception unit that transmits signals via the established wireless communication link are separated. Therefore, the signal transmission process already performed is not hindered by the wireless communication link establishment process, and the signal can be transmitted by utilizing the maximum communication speed of the wireless transmission / reception apparatus. Conversely, the establishment of the wireless communication link is not hindered because the signal transmission process is performed.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a first exemplary embodiment according to the present invention.
FIG. 2 is a flowchart illustrating an operation of an “inquiry” process in a submodule according to the first embodiment.
FIG. 3 is a flowchart showing the operation of “inquiry scanning” processing in the submodule of the first embodiment.
FIG. 4 is a flowchart illustrating an operation of “calling” processing in the submodule according to the first embodiment.
FIG. 5 is a flowchart showing an operation of “calling” processing in the main module of the first embodiment.
FIG. 6 is a flowchart showing the operation of “call scanning” processing in the submodule of the first embodiment.
FIG. 7 is a flowchart showing an operation of “call scanning” processing in the main module of the first embodiment;
FIG. 8 is a block diagram showing a configuration of a second exemplary embodiment of the present invention.
FIG. 9 is a flowchart illustrating an operation of “inquiry” processing in the host CPU according to the second embodiment.
FIG. 10 is a flowchart illustrating an operation of “inquiry scanning” processing in the host CPU according to the second embodiment.
FIG. 11 is a flowchart illustrating an operation of “call scanning” processing in the host CPU according to the second embodiment;
[Explanation of symbols]
10, 20, 30 ... Bluetooth equipment
11 ... Main module
12 Sub-module
13 Information terminal equipment
14: Host CPU

Claims (9)

A wireless transmission / reception apparatus that manages communication procedures between a plurality of wireless communication devices constituting a wireless communication network, and performs signal transmission processing with the plurality of wireless communication devices,
A first wireless transmission / reception unit that performs a signal transmission process with a wireless communication device in which a wireless communication link for signal transmission is mutually established among the plurality of wireless communication devices;
Between the other radio communication devices except the wireless communication device the wireless communication link is established with one another, seen including a second wireless transceiver responsible for preparation procedure processing until establishing a wireless communication link, the ,
The wireless communication network is a wireless communication network based on a Bluetooth wireless system, and each of the first wireless transmission / reception unit and the second wireless transmission / reception unit uses a separate Bluetooth module.
Bluetooth modules used for each of the first wireless transceiver and the second wireless transceiver have different Bluetooth device addresses,
In accordance with a predetermined control signal, the Bluetooth module of the second wireless transmission / reception unit captures the Bluetooth device address of the first wireless transmission / reception unit and sets it as its own Bluetooth device address;
A function that the Bluetooth module of the first wireless transmission / reception unit takes in the Bluetooth device address of the second wireless transmission / reception unit and sets it as its own Bluetooth device address;
A function that a Bluetooth module used in each of the first wireless transmission / reception unit and the second wireless transmission / reception unit takes in a predetermined predetermined Bluetooth device address and sets it as its own Bluetooth device address;
A wireless transmission / reception apparatus comprising at least one of the above . The first wireless transceiver unit and the second wireless transceiver unit are connected to each other,
The first wireless transmission / reception unit generates a control signal for controlling the second wireless transmission / reception unit and acquires an information signal from the second wireless transmission / reception unit. Wireless transceiver.   A control signal that is connected to each of the first wireless transceiver and the second wireless transceiver and controls each of the two wireless transceivers and generates an information signal from each of the two wireless transceivers The wireless transmission / reception apparatus according to claim 1, further comprising: a control unit that acquires the information. The wireless transmission / reception apparatus according to claim 1 , wherein the Bluetooth modules used in each of the first wireless transmission / reception unit and the second wireless transmission / reception unit have the same Bluetooth device address . The Bluetooth module used in the second wireless transmission / reception unit performs inquiry processing, inquiry scanning processing, call processing, and call scanning processing in a Bluetooth system. Wireless transceiver.   An inquiry scanning processing method performed by a Bluetooth terminal device equipped with two Bluetooth modules, a main module and a sub-module, with respect to other Bluetooth terminal devices,
A first step in which the main module requests the sub-module to execute an inquiry scanning process;
A second step in which the submodule executes an inquiry scanning process in response to an execution request in the first step;
A third step for determining that a request for stopping execution of the inquiry scanning process has been made from the main module to the sub-module;
And a fourth step in which the submodule stops the inquiry scanning process in response to the execution stop request. 7. The inquiry scan processing method according to claim 6, further comprising a fifth step in which the sub-module notifies the main module of information obtained by the inquiry scan processing executed in the second step. A Bluetooth terminal device equipped with two Bluetooth modules, a main module and a sub-module, is a call processing method implemented for other Bluetooth terminal devices,
A first step in which the main module requests the submodule to execute a calling process;
A second step in which a submodule executes a call process in response to an execution request in the first step;
A third step of notifying the main module of the result of the calling process executed in the second step;
A fourth step of determining whether communication processing with a new Bluetooth terminal is possible in the main module;
When it is determined that communication is possible in the fourth step, a fifth step in which the main module performs communication processing with the Bluetooth terminal device to be called notified from the submodule in the third step;
A sixth process in which the main module requests the sub-module to stop calling processing when it is determined that communication is impossible in the fourth process;
A call process method comprising: a seventh process in which the submodule stops the call process in response to an execution stop request in the sixth process.   A call scanning processing method performed by a Bluetooth terminal device including two Bluetooth modules, a main module and a sub-module, with respect to other Bluetooth terminal devices,
A first step in which the main module requests the sub-module to execute a call scanning process;
A second step in which the submodule executes a call scanning process in response to the execution request in the first step;
A third step of notifying the main module of the result of the call scanning process executed in the second step;
A fourth step of determining whether communication processing with a new Bluetooth terminal device is possible in the main module;
When it is determined that communication is possible in the fourth step, a fifth step in which the main module performs communication processing with the Bluetooth terminal device to be called notified from the submodule in the third step;
A sixth step for requesting the sub-module to stop the calling scanning process from the main module;
And a seventh process in which the submodule stops the call scanning process in response to the stop request in the sixth process.

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