JP3641015B2 - Wireless communication apparatus and wireless communication system - Google Patents

Wireless communication apparatus and wireless communication system Download PDF

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Publication number
JP3641015B2
JP3641015B2 JP14022695A JP14022695A JP3641015B2 JP 3641015 B2 JP3641015 B2 JP 3641015B2 JP 14022695 A JP14022695 A JP 14022695A JP 14022695 A JP14022695 A JP 14022695A JP 3641015 B2 JP3641015 B2 JP 3641015B2
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JP
Japan
Prior art keywords
fax
communication
machine
slave
line
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP14022695A
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Japanese (ja)
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JPH08336033A (en
Inventor
雅幸 茂木
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パナソニック コミュニケーションズ株式会社
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Description

[0001]
[Industrial application fields]
The present invention relates to a wireless communication system including a parent machine that can be connected to a telephone line and that can execute a facsimile communication procedure, and a child machine fax that is wirelessly connected to the parent machine.
[0002]
[Prior art]
In recent years, a wireless communication system has been developed that includes a parent machine fax connected to a telephone line and a plurality of child machine faxes wirelessly connected to the parent machine fax. In such a system, the slave fax machine establishes a communication procedure and communicates with a communication partner via a telephone line after wirelessly connecting to the master fax machine. In addition, when an incoming call is received from the telephone line, the base fax is received by itself, or is connected to the slave fax and is received by the slave fax.
[0003]
[Problems to be solved by the invention]
When a slave fax machine communicates via a telephone line, it first makes a wireless connection with the parent machine fax, then connects to the communication partner via the telephone line, but there is an incoming call to the master fax machine during or after the wireless connection. Then, the incoming call processing is prioritized and the wireless connection is disconnected. For this reason, the slave unit performs wireless connection again after the incoming call processing is completed. However, if there is an incoming call again, the wireless connection is wasted.
[0004]
In addition, when the handset fax is communicating with the other party on the telephone line via the base machine fax, the telephone line may be cut off due to an error on the other side, but the handset fax is cut off. Because I do not know, I continued to communicate with the parent fax machine as it was, and sent data wastefully.
[0005]
The present invention has been made in view of the above-mentioned problems. When a telephone line is received after wirelessly connecting to a slave fax machine and the wireless connection is disconnected, the telephone line is secured after the incoming call processing. The purpose is to enable communication through a telephone line by the next wireless connection. In addition, when the handset fax is being communicated via the telephone line and the line is disconnected, the base unit notifies the handset fax of the communication disconnection, and the handset fax transmits data to the base unit wastefully. The purpose is to prevent. In addition, when the handset fax machine is communicating via a telephone line and the line is disconnected, the purpose is to allow the master machine to accumulate transmission data from the handset fax machine so that it can be sent by proxy after the line is connected. .
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, there is provided a parent machine that is connected to a telephone line and capable of executing a facsimile communication procedure, and a child machine fax that is wirelessly connected to the parent machine. The polarity reversal signal is always detected and the slave fax is communicated with the communication partner via the telephone line via the wireless connection process with the parent device, and the communication is interrupted due to an error of the communication partner. If there is, the master unit detects the communication disconnection by detecting the polarity inversion signal and notifies the slave unit fax of the communication disconnection, and the slave unit fax receives the notification of the communication disconnection and transmits the transmission data. Is stopped from being transmitted to the parent device .
[0007]
According to a second aspect of the present invention, there is provided a parent machine that can be connected to a telephone line and can execute a facsimile communication procedure, and a child machine fax that is wirelessly connected to the parent machine. The parent machine monitors the telephone line and reverses polarity. In the case where communication is interrupted due to an error of the communication partner while the slave fax is communicating with the communication partner via the telephone line via the wireless connection process, the signal is always detected. The machine transmits a pseudo-acknowledge signal to the slave machine that has transmitted a signal indicating that the data on the next page continues even after detecting the disconnection by detecting the polarity inversion signal . Continues communication with the fax and accumulates the transmission data from the slave unit fax until the end, and after the wireless connection with the slave unit is completed, reconnects the communication partner and the line and transmits the stored transmission data .
[0012]
【Example】
According to the first aspect of the present invention, when the slave fax machine is wirelessly connected to the master unit and communicates with the other party via the telephone line, the master unit is inverted in polarity or busy tone when communication is interrupted due to an error of the other party. Communication disconnection can be detected by detecting the communication, etc., but since the slave fax machine connected wirelessly does not know the communication disconnection and sends data to the master machine, the master machine notifies the slave machine of the communication disconnection and sends it to the master machine. Stop sending data.
According to the second aspect of the present invention, when the slave fax machine is wirelessly connected to the master machine and communicates with the other party via the telephone line, when the communication is interrupted due to an error of the communication partner, The data from the server is stored, and the fax machine communication is completed. Thereafter, the base unit resumes communication with the other party whose communication has been interrupted, transmits the accumulated data, and completes the communication of the slave unit. As a result, since the slave fax machine can complete communication regardless of the disconnection of communication with the communication partner, it is not necessary to perform re-communication through a wireless connection and a telephone line.
Embodiments of the present invention will be described below with reference to the drawings.
[0013]
FIG. 1 is a block diagram showing the configuration of the embodiment. The wireless communication system includes a master fax connected to the telephone line 1 and one or a plurality of slave faxes wirelessly connected to the master fax. The master fax machine is connected to the telephone line 1. The line control unit 2 is connected to the telephone line 1 and controls connection of a circuit switching network such as calling, recovery, and dialing. The reception / transmission unit 3 is a built-in telephone. The modem 4 modulates and demodulates image data to be transmitted / received. The call circuit unit 5 switches between telephone and image data. The key operation unit 6 is used for inputting data such as a telephone number. The reading / recording unit 7 reads a document to obtain image data, and prints and records the received data. The image memory 8 stores received data and the like, and the codec 9 encodes and compresses the data to be transmitted, and decodes the received data to restore the original data. The demultiplexing unit 10 time-divides data to be wirelessly transmitted, and the wireless unit 11 performs time-division wireless communication with the slave fax machine. The slave fax machine has a radio unit, a facsimile unit, and a telephone function. Note that, when the facsimile machine performs the facsimile communication, the parent machine facsimile is not limited to the facsimile machine as long as it can execute the facsimile communication procedure.
[0014]
Each Example which performs the following operation | movement with the above structure is demonstrated.
FIG. 2 is a communication procedure diagram of the first embodiment. In the first embodiment, when a slave fax is wirelessly connected to the master fax, if the master fax arrives, the slave fax can immediately communicate with the outside line via the telephone line after the incoming call processing. Is. In FIG. 2, there is a handset fax machine on the left side, which is the calling side in this embodiment. On the right side, there is a fax of the communication partner of the handset fax machine, which is the called party. There is a main fax machine and a telephone line between them. First, it is necessary for the slave fax to be wirelessly connected to the master fax, which is called link channel establishment. For this reason, the slave machine fax makes a link channel establishment request, and the master machine fax makes a link channel assignment. This establishes a link channel.
[0015]
Assume that after a link channel is established, a call is received from the line to the master fax machine. When an incoming call is received, the parent fax machine gives priority to the incoming call and closes the line exchange. As a result, it is possible to make a telephone call with the other party who has made this incoming call and to communicate image data by fax. When this closing is performed, the identification number ID of the slave fax is stored in the memory. On the other hand, since the slave fax does not know the incoming call, a call setting signal is transmitted to the master fax via the telephone line so as to perform facsimile communication with the partner fax. On the other hand, since the main line fax has received an external line, it sends a signal for disconnecting the connection with the slave unit fax, and further broadcasts that all the connected slave unit faxes have received foreign communication. This recognizes that all handset faxes cannot be transmitted to the outside line. In this way, the base fax machine performs a telephone call or facsimile communication with the incoming caller. In this case, the parent machine fax does not call or communicate with itself, but can specify the child machine fax to make a call or communication. When the call or communication ends, the line is released, but it is immediately closed and the incoming line is excluded to secure the line. At this time, since a busy signal is output even if a call or communication is made to the master fax via a telephone line, an incoming call from the outside line does not occur.
[0016]
After closing in this way, the slave fax machine storing the ID number is notified that the line can be used and granted transmission permission. In response to this, the slave fax machine issues a link channel establishment request again, establishes the link channel, establishes a wireless connection, and performs a line establishment procedure for facsimile communication starting from call setting. The parent fax machine dials accordingly and establishes a line with the partner fax machine. Subsequently, FAX communication is performed between the slave fax machine and the partner fax machine. As described above, in this embodiment, the slave fax machine can communicate via the telephone line immediately after the termination of the incoming call processing even if the slave fax machine waits for communication with the external line once due to the incoming call of the master machine.
[0017]
FIG. 3 and FIG. 4 are flowcharts of the operation of the master fax in the first embodiment. In FIG. 3, after the idle period (S1), the main fax machine monitors the public line (telephone line) to check whether it has received an incoming call (S2). If the incoming call is received, a telephone call or facsimile communication process is performed (S3). . If there is no incoming call, the wireless line with the slave fax machine is monitored to check whether there is a connection request (S4). If the connection request of the wireless line is from the slave fax machine, the connection line is analyzed (S5), and if the extension of the slave fax machines or the slave fax machine and the master fax machine, the extension call or communication processing is performed ( S6). If it is an external line request via a public line, the public line is monitored to check whether there is an incoming call (S7). If there is an incoming call, the wireless circuit is disconnected from the slave fax machine (S9), and the identification number ID of the slave fax machine is stored in the memory (S10). At the same time, a broadcast is sent to the effect that there is an incoming call to all the slave fax machines (S11).
[0018]
In FIG. 4, the parent machine fax performs the incoming call processing, but decides whether to perform the incoming call by itself or any of the child machine faxes, and performs a call or communication (S12). In this case, it may be a handset fax in which the ID is stored. When the incoming call processing is completed, the line is released (S13), but the line is immediately closed and put in a busy state to prevent incoming calls and to secure the line (S14). Next, a notification is sent to the effect that transmission to the slave fax machine with the ID number stored in the memory is possible (S15), and monitoring is performed for a wireless connection request from the slave fax machine (S16). When a connection request is received, wireless line connection processing is performed (S17), and then fax transmission processing via the public line is performed with the partner fax (S18). After the fax transmission is completed, a wireless line disconnection process is performed (S19), and the line is released (S20).
[0019]
FIGS. 5 and 6 are operation flowcharts of the slave fax machine according to the first embodiment. In FIG. 5, a fax transmission request is made during an idle period (S21). The fax transmission request is made by pressing a start button or setting a transmission original at a reading position. Next, a wireless channel establishment request is issued, and the permission is waited (S22). If permitted, a wireless channel connection process is performed to establish a link channel (S23). If this connection is normal, fax transmission via the public line is normally performed (S24). If the connection is disconnected without being normally connected, it is checked whether the call is disconnected due to an incoming call to the public line (S25). If the incoming call is received, the wireless line is disconnected (S27). After this, if there is a broadcast to the effect that it is not possible to connect to the external line due to an incoming call from the master machine fax (S28), and if the slave machine fax that is disconnected from this wireless line goes off-hook in response to this incoming call, (S29) The telephone call or communication is normally performed with the called party (S30). If there is no broadcast, or if it is not off-hook, it waits for the incoming call processing to end.
[0020]
In FIG. 6, the slave fax machine whose wireless line has been disconnected waits for notification of transmission permission (S31). When this permission is received, it requests a wireless line establishment and waits for this permission (S32). If permitted, the parent machine fax and the wireless line are connected (S33), and then the line is established with the partner fax via the public line, and the fax transmission is performed (S34). After the completion of fax transmission, a wireless line disconnection process is performed (S35), and the process ends.
[0021]
Next, a second embodiment will be described. FIG. 7 is a communication procedure diagram of the second embodiment. In this embodiment, in order to prevent the slave machine fax from being detected and transmitted as it is when the slave fax machine is disconnected from the telephone line while communicating with the partner fax machine via the master machine fax, this is not detected. The master machine fax notifies the slave machine fax of line disconnection and stops transmission. In FIG. 7, the slave fax establishes a link channel with the master fax, establishes a wireless connection, and performs a procedure for establishing a line for facsimile communication starting from call setting. The parent fax machine dials accordingly and establishes a line with the partner fax machine. Subsequently, fax communication is performed between the slave fax machine and the partner fax machine via the telephone line. During this time, the master fax machine monitors the polarity reversal and busy tone of the telephone circuit, and the master fax machine detects this polarity reversal and busy tone. When detected, the disconnection is notified to the slave fax machine, and the radio link with the slave fax machine is disconnected. When the disconnection is completed, a notification of the completion of the disconnection is sent from the handset fax machine. When the line is disconnected, by notifying the slave unit fax, the slave unit fax stops sending transmission data to the master unit fax wirelessly, thereby preventing unnecessary transmission and connection of the wireless channel. Conventionally, even if the line is disconnected, the slave fax is not notified, so data is transmitted to the master fax with the wireless line connected.
[0022]
FIG. 8 is an operation flow diagram of the master fax machine according to the second embodiment. When the idle period is over (S40), the wireless line is monitored to check whether there is a wireless connection request from the slave fax machine (S41). If there is a connection request, a wireless line is connected (S42), and the telephone line is closed (S43). Thereafter, a facsimile communication procedure is performed, and facsimile communication between the slave fax machine and the partner fax machine is performed. The main fax machine monitors the telephone line and always detects a polarity reversal signal indicating a line disconnection (S44). If the fax transmission is completed normally without a line disconnection (S45), the line is released ( In step S46, a process of disconnecting the wireless line with the slave fax machine is performed (S47), and the process ends. When polarity reversal occurs and the line is disconnected (S44), the line is released (S48), the wireless line is disconnected from the slave fax (S49), and the disconnection is notified to the slave fax (S50). ). As a result, the slave fax machine can know that the transmitted data has not been sent to the partner fax machine and take measures such as sending it again.
[0023]
FIG. 9 is an operation flowchart of the slave fax machine according to the second embodiment. A fax transmission request is made during the idle period. This is performed by pressing a start button or setting a transmission original. When the wireless line establishment is requested and permitted by the parent machine fax (S52), the wireless line is connected (S53), then the line establishment procedure for facsimile communication is performed, and the facsimile transmission is performed to the partner fax (S54). ). If the communication ends normally, the facsimile communication ends. However, when a notification of line disconnection is received during the communication (S55), the wireless line is disconnected (S56), and the communication ends.
[0024]
Next, a third embodiment will be described. In this embodiment, the communication is terminated by notifying the slave machine fax of the line disconnection in the second embodiment, but when the line is disconnected, the transmission data from the slave machine fax after the line disconnection is displayed by the master fax machine. The facsimile communication is completed by transmitting the data stored in the memory, connecting the line again, and storing the data in the partner fax. As a result, the fax machine can complete the fax transmission regardless of the line disconnection.
[0025]
FIG. 10 is a communication procedure diagram of the third embodiment. This figure is the same as that of the second embodiment shown in FIG. 7 until the line is disconnected during communication between the slave fax machine and the partner fax machine. When line disconnection is detected by polarity reversal, the base fax releases the line, terminates communication with the partner fax, stores transmission data from the slave fax in the image memory 8, and completes the transmission of the slave fax. . After the transmission is completed, the wireless line disconnection is notified, and a wireless line disconnection completion notice is received from the slave fax machine. Thus, the slave fax can transmit all the data to be transmitted and complete the communication. Thereafter, the parent fax machine closes the line, performs a facsimile communication procedure, and reestablishes the line with the partner fax machine. Next, the transmission data stored in the image memory 8 is read and transmitted to the partner fax. The line is released after transmission is completed.
[0026]
FIG. 11 is a diagram showing details of the facsimile communication procedure of the third embodiment. When a wireless line is connected between the slave fax machine and the master fax machine, and a line connection is established between the slave fax machine and the partner fax machine via the master machine fax, the digital identification signal DIS is sent from the partner fax machine, and the receiver Shows performance. On the other hand, the handset fax sends a digital command signal DCS, instructs a function to be set from among the communication functions displayed by DIS, and sends a training check signal TCF by this function. If this training is acceptable, the other party's fax will send out a reception preparation confirmation signal CFR, so the slave unit will send one page of image signal PIX-1, and the other page will receive a multi-page signal MPS indicating that the next page will continue. To send. It is assumed that a line disconnection has occurred at this time. The master fax also monitors the communication procedure, and knows that the acknowledgment signal MCF for the MPS is not sent from the partner fax due to the line disconnection. In such a range A, the line is normally connected, and communication is performed between the slave fax machine and the partner fax machine. The range of B is wireless communication between the slave fax machine and the master machine fax, and the range of C is communication via a line between the master machine fax and the partner fax machine.
[0027]
In the range B, when the master fax detects line disconnection, it immediately sends an MCF signal to the slave fax. As a result, the slave FAX sends out the image signal PIX-2 of the second page and EOP indicating the end of the transmission procedure without knowing the fact of the line disconnection. The master fax stores the PIX-2 in the image memory 8 and sends an affirmative signal MCF for EOP. On the other hand, the slave FAX sends a disconnect command signal DCN to disconnect the facsimile communication.
[0028]
In the range of C, the master fax is connected to the partner fax by line connection. As a result, the DIS is sent from the partner fax in the same way as the range A, and the master fax sends a DCS in response to this to determine the communication function, performs TCF and receives this positive signal CFR. The PIX-2 of the second page is transmitted and EOP indicating the end of transmission is transmitted. When the EOP affirmation signal MCF is received, a disconnection command signal DCN is transmitted to disconnect the line and complete the fax communication. In the above explanation, the case where the line was disconnected after sending the MPS to the handset fax machine was explained. However, even if the line break occurs at other stages, the master fax is appropriate for the stage at which the line break occurred. A simple signal is sent to the slave fax machine and communication with the slave fax machine is continued.
[0029]
FIG. 12 is an operation flowchart of the master fax in the second embodiment. When the idle period ends (S60), the wireless line is monitored to check whether there is a connection request (S61), and when there is a connection request, the wireless line is connected (S62). When the wireless connection with the slave fax machine is completed, the telephone line is closed (S63), the line is connected by the facsimile communication procedure, and then the polarity inversion signal is monitored to detect a line disconnection (S64). If the line disconnection is not detected, the procedure of the slave fax and the partner fax is monitored. The DIS, DCS signal and procedure history are stored in the image memory 8. When the line communication is not terminated and the facsimile communication is finished (S65), the telephone line is opened (S66), and the wireless line with the slave fax machine is disconnected (S67).
[0030]
When the line disconnection occurs (S64), the subsequent facsimile procedure is performed on the slave fax machine instead of the partner fax machine (referred to as reception fax proxy), and the image signal PIX is stored in the image memory 8. When the communication with the slave fax machine is completed (S68), the wireless line with the slave fax machine is disconnected (S69). Next, the telephone line is closed (S70), the telephone line with the partner fax is connected by the facsimile procedure, and then the interrupted transmission data is transmitted to complete the facsimile communication (S71). After completion, the telephone line is released (S72), and the process ends.
[0031]
FIG. 13 is an operation flowchart of the slave fax machine according to the third embodiment. A fax transmission request is made during the idle period (S80). Next, a request is made to the base station fax for establishing a wireless line. If there is permission (S81), the wireless line is connected (S82), and then the line is established by the facsimile with the partner fax via the base station fax. Perform transmission. When the communication ends (S83), the process ends. The slave fax machine can complete the fax transmission without being aware of this even if the telephone line is disconnected.
[0032]
As is clear from the above explanation, the present invention is able to cancel communication because the parent machine is notified of the fact that the slave machine fax is disconnected from the other fax machine via the telephone line. It is possible to prevent data from being wirelessly transmitted to the base unit. Also, in case of line disconnection, the master unit will continue to communicate with the slave fax machine, and will receive the other party's fax on its behalf. It is possible to complete communication without any problems, and the system is easy to use.
[Brief description of the drawings]
FIG. 1 is a block diagram showing the configuration of an embodiment. FIG. 2 is a communication procedure diagram of the first embodiment. FIG. 3 is an operation flow diagram of a parent machine fax according to the first embodiment. FIG. 5 is an operation flow diagram of the machine fax following FIG. 3. FIG. 5 is an operation flowchart of the slave fax machine according to the first embodiment. FIG. 6 is an operation flowchart of the slave machine fax according to the first embodiment. FIG. 7 is a communication procedure diagram of the second embodiment. FIG. 8 is a flowchart of operation of the master fax in the second embodiment. FIG. 9 is a flowchart of operation of the slave fax in the second embodiment. Communication procedure diagram of the embodiment FIG. 11 is a facsimile procedure diagram of the third embodiment. FIG. 12 is an operation flow diagram of the parent machine fax of the third embodiment. FIG. 13 is an operation flowchart of the child machine fax of the third embodiment. [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Telephone line 2 Line control part 3 Reception / transmission part 4 Modem 5 Communication circuit part 6 Key operation part 7 Reading / recording part 8 Image memory 9 Codec 10 Demultiplexing part 11 Radio part

Claims (2)

  1. It consists of a parent machine that can be connected to a telephone line and can execute a facsimile communication procedure, and a child machine fax that is wirelessly connected to the parent machine. The parent machine monitors the telephone line and always detects a polarity inversion signal. When communication is interrupted due to an error of the communication partner while the slave fax is communicating with the communication partner via the telephone line via the wireless connection process with the master device, the master device transmits the polarity inversion signal. Detecting the communication disconnection by detection and notifying the slave fax machine of the communication disconnection, the slave fax receiving the notification of the communication disconnection and stopping transmitting transmission data to the master unit A wireless communication system.
  2. It consists of a parent machine that can be connected to a telephone line and can execute a facsimile communication procedure, and a child machine fax that is wirelessly connected to the parent machine. The parent machine monitors the telephone line and always detects a polarity inversion signal. When communication is interrupted due to an error of the communication partner while the slave fax is communicating with the communication partner via the telephone line via the wireless connection process with the master device, the master device transmits the polarity inversion signal. to handset fax data of the next page has been transmitted to the subsequent effect of the signal after having detected the communication interruption by the detection, and continuing the communication with the slave machine fax by returning a pseudo acknowledgment signal Te accumulates transmission data from the slave machine fax to the end, after the wireless connection termination with the handset, wireless communication and transmits the transmission data the storage reconnect the communication partner and the line Shi Temu.
JP14022695A 1995-06-07 1995-06-07 Wireless communication apparatus and wireless communication system Expired - Fee Related JP3641015B2 (en)

Priority Applications (1)

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JP14022695A JP3641015B2 (en) 1995-06-07 1995-06-07 Wireless communication apparatus and wireless communication system

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Application Number Priority Date Filing Date Title
JP14022695A JP3641015B2 (en) 1995-06-07 1995-06-07 Wireless communication apparatus and wireless communication system

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JPH08336033A JPH08336033A (en) 1996-12-17
JP3641015B2 true JP3641015B2 (en) 2005-04-20

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Publication number Priority date Publication date Assignee Title
JP5880205B2 (en) * 2012-03-28 2016-03-08 ブラザー工業株式会社 Wireless communication device

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