JPH08214133A - Communication equipment - Google Patents

Abstract

PURPOSE: To execute end of communication nearly in the same timing in the case of communication between a portable facsimile equipment and an adaptor of a destination facsimile equipment by detecting stop of a busy signal so as to conduct succeeding processing corresponding to a post command. CONSTITUTION: A base station 4 has a radio equipment and an adaptor function to make radio communication with a digital portable telephone set 3. The base station 4 connects to a public channel network 5, a conventional facsimile equipment 6 and a telephone set 7 are connected to the public channel network 5 and communication is conducted between a portable facsimile equipment 8 and the facsimile equipment 6. When image information quantity sent from a transmission means and counted by a count means does not reach a prescribed quantity, dummy information is added to the original information and the resulting information reaching the prescribed quantity or over is sent. After any of post-commands in response to a succeeding processing condition to the transmission of image information is sent in succession to the image information, stop of a busy signal is detected and succeeding processing corresponding to the post-command is conducted by a control means. Thus, the communication end time of the image transmitter side and that of the adaptor side are almost the same and then the management of channels is facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication device such as a portable facsimile which is directly connected to a digital wireless telephone and communicates with a facsimile device connected to a public line network or the like.

[0002]

2. Description of the Related Art A digital portable telephone wirelessly communicates with a base station and can communicate with a general facsimile apparatus via a public line network connected to the base station. As a standard for such communication, RCR (Radio System Development Center)
RCR STD-27B defined by According to this standard, a facsimile 1 is connected to a digital mobile phone 3 via an adapter 2 as shown in FIG. 4, and the digital mobile phone 3 wirelessly communicates with a base station 4 having an adapter.
The base station 4 uses a public line network 5 to send an ordinary facsimile 6
Or connect to the phone 7. Here, the adapter can convert the protocol of the wireless device and the protocol of the facsimile and store the memory image information. The facsimile 1 and the adapter 2 are connected by a modular cable, and the progress of the protocol is controlled at a speed of 300 bps. For this reason, the above-mentioned rule allows communication between the facsimile 1 and the adapter 2,
The time to exchange control signals and image signals is taken into consideration.

By the way, recently, a portable facsimile in which the adapter 2 is built has been developed. However, if this is done, the exchange of control signals and image signals between the facsimile 1 and the adapter 2 becomes unnecessary, and the time can be almost ignored. Therefore, when communicating with the FAX 6 via the base station 4 shown in FIG. 4, the base station 4 has a role of a radio device and an adapter, and between the base station 4 and the FAX 6, a control signal and an image signal are transmitted. Since the communication is carried out, the procedure of the mobile facsimile progresses and the procedure with the one having the adapter is deviated from each other. This is because the above standard is a CFR (reception preparation confirmation signal) used in facsimile communication in communication between wireless devices,
It is also because MCF (message confirmation signal) is not used. Hereinafter, the communication procedure based on the above standard and the problems when a portable facsimile having an adapter built therein is used in this standard will be described.

[0004]

FIG. 5 shows the standard RCR S.
A case where an EOP signal is used in the procedure for performing facsimile communication in the communication form shown in FIG. 4 based on TD-27B is shown. The communication between the unit 1 and the unit 2 is performed in full duplex. FAX1 is FAX1 of FIG. 4, unit 1 is adapter 2, unit 2 is base station 4 adapter, FAX
2 corresponds to FAX 6 in FIG. The preamble is a signal attached to the control signal for synchronization and is attached to the first signal whose signal direction is changed. Wireless communication is performed between the unit 1 and the unit 2, and during this period, a signal is output without waiting for the response of the other party. That is, MCF or CFR is not used. RT
C is a control return signal and is attached below the image signal.
Image signals up to TC are used. EOP is a procedure end signal and indicates that there is no other transmission message at the end of the page.
After receiving the F signal, proceed to disconnect the line. The DCN does not require a response with a disconnect command signal. The end of PIX indicates the end of the image signal in wireless communication.

FIG. 6 shows a case where an MPS signal is used based on the standard RCR STD-27B. MPS indicates with a multi-page signal that when the page is finished, the next page is sent. FAX 1 and unit 1, unit 2 and FAX
While the MCF indicating that the message has been completely received is issued to the MPS between 2 and 3, the MCF is not sent to the MPS between the unit 1 and the unit 2 in the wireless communication section.

FIG. 7 shows a case where an EOM signal is used based on the standard RCR STD-27B. EOM is an end-of-message signal and indicates that the procedure returns to the beginning of Phase B when the page is finished. When the picture signal ends, EOM is issued and MCF affirming this is issued. However, the MCF is not output between the unit 1 and the unit 2 in the wireless section. The phase B procedure is performed between the FAX 1 and the unit 1 and the unit 2 and the FAX 2. CSI is a called terminal identification signal and DIS is a digital identification signal, which indicates that the called terminal has a standard receiving function. TSI is a transmission terminal identification signal, and DCS is a digital command signal, which represents communication speed and the like. In the training check, the TCF checks whether the channel can be used at the communication speed indicated by DCS. CFR
Indicates that a message (image signal) may be transmitted by making a positive response to the TCF with a reception preparation confirmation signal. TC
When a CFR response is received for F, an image signal is transmitted. In units 1 and 2 in the wireless communication section, TSI, DC
When S is output, the image signal is transmitted, and an acknowledgment signal such as CFR is not used.

FIG. 8 shows a case in which an image signal is transmitted twice by using a portable facsimile in which the adapter 2 is built. When the first image signal is transmitted between the unit 2 and the FAX2, the EOM signal shown in FIG. 7 is transmitted, the process returns to phase B, the second time is transmitted and then the EOP shown in FIG. 5 is transmitted, and the line is connected by DCN. Disconnect. On the other hand, mobile FAX
Between the unit and the unit 2, one-way
When the image signal is sent from X, PIX ends, EOM, TS
I, DCS are sent out, then an image signal is sent out, PIX end, EOP, DCN are sent in succession to end. Therefore, a situation occurs in which the second image signal is received while the procedure for ending the first image signal is being performed by the unit 2 and the FAX 2, and when the preparation for receiving the second image signal is started, the portable F
Communication from AX has ended. Mobile FAX like this
There is a problem that the communication of the unit 2 differs from the communication of the unit 2 and the communication of the FAX 2 at different timings, which makes the management of the line complicated and makes the management of the charge system particularly difficult.

Next, the problem when the training signal TCF fails and the training failure signal FTT is generated will be described.

FIG. 9 shows a procedure for processing the training failure signal FTT based on the standard RCR STD-27B. FAX1 is T1 to unit 1 and D that shows communication speed
When transmitting the CS signal, unit 1 receives this TSI and DC.
The S signal is sent to the unit 2, and the TSI and DCS signals are sent from the unit 2 to the FAX 2. If the communication speed indicated by the DCS signal is not correct between the unit 2 and the FAX 2, the training speed performed by the training check signal TCF is incorrect, and thus the FTT
The signal is returned from FAX 2 to unit 2. X
TCF X represents that TCF is not proper. This FTT is sent from unit 2 to unit 1. In this way, TCF is performed three times between the unit 2 and the FAX 2 at the same communication speed, and in the case of both FTT signals, a disconnection command DCN is sent from the unit 2 and the line is disconnected. During this time, a training check is performed between the FAX 1 and the unit 1 at the communication speed indicated by DCS, but since the unit 1 sends the FTT from the unit 2, TC
A command retransmission signal CRP is issued to F. Do this training check three times, but the third unit 1
In response to the FTT signal from the unit 2, the FTT signal is sent to the FAX1. In this way, the training check is performed three times in order to distinguish between the case where the training fails due to a recoverable temporary cause and the case where the communication speed does not match, and when the training fails three times,
It is determined that the communication speed does not match.

FIG. 10 shows the case where the training check is successful based on the standard RCR STD-27B. FAX1 indicates TSI and communication speed D to unit 1
It sends a CS signal, which is wirelessly communicated from unit 1 to unit 2 and from unit 2 to FAX 2.
The unit 2 performs the training check TCF at the communication speed of DCS to obtain the reception preparation confirmation signal CFR indicating the successful training. On the other hand, FAX1 also transmits TCF to unit 1 at the communication speed indicated by DCS. Unit 1 is FA
A CFR indicating successful training is transmitted to the TCF sent by X1, but the time for transmitting this CFR is TC.
In this case, no signal is received from the unit 2 within 2.4 + 2.5 = 4.9 seconds after receiving F. When CFR is received, FAX1 sends out an image signal, and this image signal is sent from unit 1 to unit 2 and from unit 2 to FAX2.

FIG. 11 is a procedural diagram showing a problem when an image signal is transmitted by using a portable facsimile having the adapter 2 built therein. Mobile FAX is TSI and DC indicating communication speed
When S is sent to the unit 2, the image signal is subsequently sent. On the other hand, the unit 2 receiving the TSI and DCS sends this to the FAX2, and then performs the training check TCF at the communication speed indicated by DCS, but the communication speed instructed by the DCS is not appropriate and the FTT is received from the FAX2. The signal is returned. In this case, the unit 2 and FAX 2 are shown in FIG.
The same procedure as the procedure described in 1. is performed, TCF is repeated three times at the same communication speed, and then the line is disconnected by DCN. Therefore, the image signal transmitted from the portable FAX to the unit 2 is not transmitted to the FAX 2 and the communication ends.
In the case of a fax machine with a built-in adapter, there is almost no time for exchanging signals between the FAX and the adapter, so it is assumed that signals will be exchanged during this period. RCR STD-2
It cannot be applied to the 7B standard.

Next, a case where the wireless communication speed is slower than the speed specified by DCS will be described. Wireless communication is performed between the unit 1 and the unit 2. In the wireless section, wireless communication frames are always sent and received every 20 ms, and ARQ control (automatic repeat request control) independent of the FAX protocol
It is carried out. Therefore, if there are many error frames in the wireless section, the throughput is reduced due to the retransmission by ARQ. In other words, the communication speed of the wireless section can be estimated from the frame error rate of the wireless section. Therefore, the number of error frames of the wireless communication frames received in the past 5 seconds is counted, and the communication speed in the wireless section is estimated from this value. This communication speed is also called a quality estimation value of a wireless section, but this name is used because the wireless section estimated speed is easier to understand.

FIG. 12 shows a processing procedure in the case where the wireless section estimated speed is faster than the DCS designated speed in accordance with the regulation of RCR STD-27B. FAX1 receives the DIS signal (the digital identification signal represents the receiving function of the called end) from FAX2, and based on this, the communication speed is specified by the DCS signal and T
It is transmitted to the unit 1 together with the SI signal, and is transmitted from the unit 2 to the FAX 2 via the unit 1. FAX1 is DC
After transmitting the S, the TCF signal is transmitted to the unit 1. At this time, the unit 1 checks whether the DCS designated speed is faster than the estimated wireless section speed, and when it is faster, transmits the TCF error detection signal to the unit 2. When the unit 2 receives the TCF error detection signal, it sends the TCF signal with an error to the FAX 2
The AX2 transmits the FTT signal indicating the training failure. This FTT output is sent from unit 2 to unit 1. Since the unit 1 receives the FTT within the time to respond to the TCF, the unit 1 transmits the FTT to the FAX1. On the other hand, the unit 2 transmits to the FAX 2 DCS (fallback DCS) whose communication speed is lowered by one step together with TSI, and transmits TCF at this communication speed. This T
When the CF succeeds, the CFR signal is transmitted from the FAX 2 to the unit 2. In FAX1, after the first TCF, T
The SI and DCS are transmitted to the unit 1, the TCF is entered, and the CFR signal indicating that the image signal may be transmitted is received.
Upon receiving the CFR signal, the FAX 1 transmits an image signal, and this image signal is transmitted from the unit 1 to the unit 2 and the unit 2 to the FAX 2. Second TCF in Unit 1
When the second DCS designated speed is faster than the wireless section estimated speed when receiving, the TCF error detection signal is transmitted to the unit 2 as in the previous case. After that, the same processing as the previous time is performed. According to the above-mentioned regulations, the communication speed will be reduced step by step until the wireless section estimated speed is reached in this way.

FIG. 13 shows a processing procedure when the DCS designated speed is not higher than the wireless section estimated speed in accordance with the regulation of RCR STD-27B. FAX1 for TSI and DCS signals
Is transmitted to the FAX 2 via the units 1 and 2, and the TCF signal is transmitted from the FAX 1 and the unit 2 to the units 1 and 2 based on the DCS signal. The CFR indicating that the image signal may be transmitted from the FAX 2 is transmitted to the unit 2. Since the unit 1 does not receive the FTT within a predetermined time, the unit 1 transmits the CFR to the FAX 1.
The FAX 1 receives the CFR and transmits the image signal, and the image signal is transmitted to the FAX 2 via the unit 1 and the unit 2.
When the specified DCS speed is not higher than the estimated wireless section speed, the image signal can be transmitted smoothly.

FIG. 14 is a diagram showing a problem when an image signal is sent out using a portable facsimile having a built-in adapter. The DCS designated speed is higher than the wireless section estimated speed,
This corresponds to the case described in FIG. In the portable FAX with a built-in adapter, following the TSI and DCS signals, a TCF error detection signal that is output as a result of checking that the specified DCS speed is higher than the estimated wireless section speed is transmitted, and then the image signal is also transmitted. On the other hand, between the unit 2 and the FAX 2 which have received the TSI and DCS signals and the TCF error detection signal,
The same procedure is carried out. Therefore, unit 2 and FAX
It took a long time to fall back to 2 and start communication of the image signal, and it took a long time to transmit the image signal transmitted to the unit 2 to the FAX 2.

FIG. 15 shows a case in which a signal is transmitted using a portable facsimile machine having a built-in adapter and there is no problem. When the DCS designated speed is not higher than the wireless section estimated speed, the DCS designated speed may be used between the unit 2 and the FAX 2 and no problem occurs. The portable FAX sends the TSI and DCS signals to the unit 2 and subsequently also the image signals. When the unit 2 receives the TSI and DCS, it receives the TCF
When the training is successful and the CFR signal indicating that the image signal transmission may be started is received from the FAX2, the image signal is transmitted to the FAX2. The procedure between the unit 2 and the FAX 2 is the same as in the case of FIG.

As described above, when the portable facsimile having the built-in adapter is connected to the digital communication of the RCR STD-27B standard for communication, the following problems occur. Communication between the portable facsimile machine and the other party's facsimile adapter ends much earlier than the end of communication between the other party facsimile and its adapter, causing problems such as charges. If the adapter and the other party's facsimile cannot communicate at the instructed communication speed, the communication speed change cannot be instructed and the communication ends. If the communication speed specified from the mobile facsimile is higher than the estimated wireless section speed, the same procedure will be repeated until the communication speed between the other party's facsimile and the adapter reaches the estimated wireless section speed. Was there.

The present invention has been made in view of the above problems, and an object thereof is to realize the following matters. When communicating with the mobile facsimile side and the other side facsimile adapter, the line termination timings should be approximately the same. When communication is not possible at the other party at the communication speed instructed to the other party on the portable facsimile side, a change instruction is made possible so that the image signal can be transmitted. The portable facsimile side instructs a communication speed that does not exceed the estimated wireless section speed to shorten the time required for communication speed adjustment.

[0019]

In order to achieve the above object, according to the invention of claim 1, an adapter for transmitting a busy signal when protocol conversion between a wireless device and a facsimile is performed in a wireless telephone and a predetermined amount of image information is received. A transmitting means for transmitting image information to a communication terminal connected via the transmitting means, a counting means for counting the amount of image information transmitted by the transmitting means, and an amount of image information counted by the counting means is the predetermined amount. If it does not reach the specified value, the dummy information is added and the image information of which the amount is equal to or more than the predetermined amount is transmitted, and one of the post commands (EOP, MPS, EOM) corresponding to the processing condition next to the image information transmission is transmitted to the image information. And the control means for detecting the stop of the busy signal and performing the next processing corresponding to the post command.

In the invention of claim 2, the dummy information is transmitted using the same signal frame as the signal frame for transmitting the image information.

In the invention of claim 3, the dummy information is
It is added after the control return signal (RTC) added at the end of the image information and added until the total capacity with the image information reaches a predetermined amount.

According to another aspect of the invention, there is provided a transmitting means for transmitting image information to a communication terminal connected to the wireless telephone via an adapter for protocol conversion between the wireless device and the facsimile, and transmitting means from the communication terminal side. And a detection means for detecting a training failure signal (FTT signal), and an image if the detection means does not detect the FTT signal even after a predetermined time has elapsed since the transmission means transmitted the DCS signal indicating the communication speed. Control means for instructing the transmission means to transmit information.

In a fifth aspect of the present invention, transmitting means for transmitting image information to a communication terminal connected to the wireless telephone via an adapter for performing protocol conversion between a wireless device and a facsimile, and transmitting means from the communication terminal side. Detecting means for detecting a training failure signal (FTT signal), and the detecting means detects the FTT signal within a predetermined time from when the transmitting means transmits the DCS signal indicating the communication speed, and further within the set time. When the FTT signal is detected once a predetermined number of times in succession every set time, the transmission of a signal indicating that the communication speed indicated by the DCS signal has an error (TCF error detection signal) is transmitted. Control means for instructing the means.

According to a sixth aspect of the invention, transmitting means for transmitting the image information to the communication terminal connected to the wireless telephone via the adapter for converting the protocol between the wireless device and the facsimile, and transmitting from the communication terminal side. Detecting means for detecting a training failure signal (FTT signal), and the detecting means detects the FTT signal within a predetermined time from when the transmitting means transmits the DCS signal indicating the communication speed, and further within the set time. It is once, and the above-mentioned F is continuously performed at every set time.
When the TT signal is detected but the predetermined number of times has not been reached, a control means for instructing the transmission means to transmit image information is provided.

According to a seventh aspect of the invention, there is provided a transmitting means for transmitting image information to a communication terminal connected to the wireless telephone via an adapter for performing protocol conversion between a wireless device and a facsimile, and communication on the side of the communication terminal. When the communication speed determined based on the function is faster than the wireless section estimated speed estimated by the communication error history of the image information, the control means for instructing the transmitting means to transmit the wireless section estimated speed as the communication rate by the DCS signal. With.

[0026]

According to the first aspect of the present invention, the image information is transmitted by an amount equal to or larger than the amount of transmitting a busy signal when received by the adapter side, and this image information is followed by the end of transmission of the image information and the image information to be transmitted subsequently. Send a post command indicating. The adapter side performs the image information transmission procedure with the communication terminal, but stores the image information transmitted before the time when it can be transmitted to the communication terminal in the memory, and when this storage amount reaches the predetermined amount, a busy signal is sent. send. When the transmission of image information to the communication terminal progresses and the storage amount decreases, the busy signal is stopped. In other words, the stop of the busy signal is a signal notifying that the transmission of the image information to the communication terminal is almost completed. Therefore, in order to make the stop of the busy signal into a response signal of the post command indicating the next processing, the image information is transmitted in an amount more than the amount of transmitting the busy signal, and the stop of the busy signal is detected and the next By performing the procedure, the communication between the image information transmitting side and the adapter side can be almost synchronized. For example, EO indicating the end of image information transmission as a post command
If the stop of the busy signal is detected after sending P, and the line disconnection signal DCN is sent after this, the communication between the adapter and the communication terminal will end shortly after the stop of the busy signal.
The communication end time of the image information transmission side and that of the adapter side are almost the same, which facilitates line management.

According to the second aspect of the invention, the dummy information to be added in order to make the image information the predetermined amount is transmitted using the same frame as the signal frame for transmitting the image information. As a result, the dummy information can be handled in the same way as the image information and the management becomes easy.

In the third aspect of the present invention, the dummy information is continuously added after the control return signal RTC added to the end of the image information so that the total amount of the image information and the dummy information reaches a predetermined amount. This facilitates the process of adding dummy information.

In the invention of claim 4, when the training check performed by the adapter and the communication terminal fails after the communication speed is instructed from the transmitting means, the training failure signal FTT notified from the adapter is waited until a call arrives. However, if the FTT signal is not received during that period, the training is successful, and it is confirmed that the instructed communication speed is appropriate, and the image signal is transmitted. Thus, if the instructed communication speed is not appropriate, there is an opportunity to instruct to revise the communication speed, so that reliable communication can be performed.

According to the invention of claim 5, when the training check performed by the adapter and the communication terminal fails after the communication speed is instructed from the transmitting means, the training failure signal FTT notified from the adapter is waited for the incoming period and the FT is performed.
When the T signal is received, and when the FTT signal is received once more within the set time and the predetermined number of times is continuously received, the T
The CF error detection signal is transmitted to the adapter, and the adapter changes the communication speed by this signal to change to an appropriate communication speed. When the training check performed after this succeeds and the training fails, the image signal is transmitted after waiting for the period when the FTT signal comes. As a result, even if the communication speed is incorrectly specified, the communication speed can be changed and the image signal can be reliably transmitted. Note that changing the communication speed after receiving the FTT a predetermined number of times may cause the FTT signal to be output for a temporary reason even if the communication speed is appropriate. This is to confirm that the communication speed is not appropriate when the above occurs.

According to the invention of claim 6, when the training check performed by the adapter and the communication terminal fails after the communication speed is instructed from the transmitting means, the training failure signal FTT notified from the adapter is waited for an incoming period and the FT is performed.
When the T signal is received, the number of times the FTT signal is received once more within the set time is counted, and when the number of received FTTs does not reach the predetermined number, it is assumed that the FTT has occurred due to a temporary cause, and communication is performed. The image signal is sent to the adapter without changing the speed. As a result, it is possible to prevent the correct communication speed from being changed by the FTT signal generated due to a temporary cause.

According to the seventh aspect of the present invention, since the wireless communication performed between the communication device and the adapter is retransmitted when there is an error, the equivalent communication speed can be estimated from the retransmission history. The communication speed instructed to the communication terminal as a DCS signal is determined by the functions of the communication terminal and this communication device. If this communication speed is faster than the wireless section estimated speed, this communication speed is changed to the estimated wireless section speed. And sends it to the adapter as a DCS signal. As a result, the communication speed is confirmed by one training check, and the time for the communication speed setting procedure can be shortened.

[0033]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a communication system of the portable facsimile apparatus of this embodiment. The same symbols as those in FIG. 4 indicate the same components. Portable facsimile machine (hereinafter referred to as portable F
An AX) 8 is connected to the digital mobile phone 3. The portable FAX 8 is an integrated one in which the adapter 2 described with reference to FIG. 4 is built in, and the communication procedure for exchanging control signals and image signals, which is conventionally performed between the adapter and the facsimile 1, is unnecessary. The adapter 2 has a function of converting a wireless protocol and a facsimile protocol, and also has a storage function. The base station 4 performs wireless communication with the digital mobile phone 3, and has a wireless device and an adapter function. The base station 4 is connected to a public line network 5, and the public line network 5 is connected to a general facsimile (FAX) 6 and a telephone 7. Communication is performed between the mobile FAX 8 and the FAX 6, and digital communication is performed based on the RCR STD-27B standard described above.

FIG. 2 is a block diagram showing the configuration of the portable facsimile machine 8. The control unit 11 has a CPU and controls the whole according to a program. The bus 12 is connected to each component and transmits signals. The scanner 13 reads a document or the like, and the printer 14 prints out a transmitted electronic message, a document read by the scanner 13 or the like. The interface (I / F) 15 communicates with the scanner 13 and the printer 14 and the control unit 11, the RAM 17, and the like connected to the bus 12. The ROM 16 stores programs and the like, and the control unit 11 controls according to the programs. The RAM 17 is used as a work area of the control unit 11, and develops a program read from the ROM 16 and stores and reads data. The display panel 18 displays the communication status and operation instructions.

The serial input / output unit (SIO) 19 has two lines, an up serial line and a down serial line. The up serial line switches to facsimile communication, cancels it, and turns the hook on / off, and the down serial line. Confirmation of switching / cancellation to facsimile communication,
Incoming call display and ON / OFF notification during a call. The digital processing unit 20 performs serial / parallel conversion of digital data, has a buffer, and controls the communication speed. The digital interface 21 communicates with the digital mobile phone 3.

FIG. 3 shows the contents of a wireless communication frame used for wireless communication. Full-duplex communication is used for wireless communication, and F
ARQ (Automatic Retransmission Request) control is performed independently of the AX protocol. In the wireless section, wireless communication frames are constantly transmitted and received every 20 ms. The wireless communication frame includes a backward channel control signal 24 indicating a response to the received frame, a forward channel control signal 25 indicating the type of frame to be transmitted, and forward channel information 26 indicating the content of the frame to be transmitted.
And a cyclic code (CRC) 27 for error detection.
The backward channel control signal 24 is provided with a busy flag, and the forward channel control signal is S / P.
A flag is provided. When the S / P flag is P, the forward channel information is a picture signal, and when it is S, it is a control signal. FCF 28 indicates a facsimile control feed, where TCF, E
The control signal already described such as OP is entered. FIF2
Reference numeral 9 is an area for writing additional information for further clarifying the control signal indicated by the FCF 28.

The operation of the above configuration will be described. In the first embodiment, when the mobile FAX 8 and the general FAX 6 connected to the public network 5 are communicated, the communication between the mobile FAX 8 and the base station 4 and the communication between the base station 4 and the FAX 6 are made close to the synchronization. It was done. In this embodiment, after the portable FAX 8 transmits the post commands EOP, MPS, and EOM described with reference to FIGS. 5 to 7, a large synchronization shift occurs as described with reference to FIG. For example, the transmission timing of the DCN signal with respect to the EOP signal is set as close as possible between the portable FAX 8 and the base station 4 represented by the unit 2. In carrying out this embodiment, the following rules defined in the RCR STD-27B standard are used. The adapter outputs a busy flag when the image signal stored in the memory of the adapter is 700 bytes or more, and releases the busy flag when the image signal stored in the memory is 300 bytes or less.

FIG. 16 is a control procedure diagram of the first embodiment.
17 is a communication procedure diagram when the image signal of the last page is 700 bytes or more, and FIG. 18 is 700 when the image signal of the last page is 700 bytes.
It is a communication procedure diagram when it is less than a byte. FIG. 17 and FIG. 18 show a state in which the state of FIG. 8 in which the synchronization deviation is large as described above is applied to make them almost in synchronization. 17 and 18, the unit 2 is the same as in FIG.
Represents the adapter of the base station, and FAX2 is the FA shown in FIG.
X6 is shown, and the communication procedure between the unit 2 and FAX 2 is shown in FIG.
Is the same as

FIG. 16 shows a control procedure of the portable FAX, which will be mainly described with reference to the concrete examples of FIGS. 17 and 18. The transmission state will be described from the beginning of the transmission of the first image signal to the transmission of the second image signal. 17 and 18, an image signal is transmitted from the portable FAX, a "PIX end" signal indicating the end of the image signal and an end of the image signal, and a message end signal EOM for returning to phase B are transmitted, and the phase B transmitting terminal Identification signal TS
I, and a digital command signal DCS indicating the communication speed and the like are transmitted. When transmitting two or more pages, the multi-page signal MPS is normally transmitted. In the case of MPS, it is not necessary to send out TSI and DCS because the processing is performed within phase C. Such a state is the state in which the phase B of FIG. 16 is terminated and the phase C is shifted to (S1). On the other hand, it takes a long time between the unit 2 and the FAX 2 to transmit the image signal from the transmission of the image signal as compared with the wireless section.
The gap from the mobile FAX side is increasing.

The portable FAX shifts to phase C, starts transmitting the image signal, and counts the number of transmission frames of the image signal shown in FIG. 3 (S2). After transmitting the image signal and ending the phase C (S3), the number of frames of the transmitted image signal is checked. The image signal is one frame 2 shown in FIG.
Since 4 bytes are transmitted, 30 frames or more must be transmitted in order to transmit 700 bytes or more. Therefore, check whether the transmitted image signal is 30 frames or more (S
4) If it is 30 frames or more, it is left as it is. If it is less than 30 frames, a dummy frame with 0 added to the image signal position is added and transmitted until 30 frames are reached (S5). FIG. 17
The image signal of is for 30 frames or more, and in this case, it is transmitted as it is. On the other hand, since the image signal of FIG. 18 does not reach 30 frames even including RTC, dummy frames are transmitted so that the total transmission frame becomes 30 frames. After this, the "PIX end" frame is transmitted (S
6) Then, the post command EOP is transmitted (S7).
As the post command, EOP and M shown in FIGS.
There are PS and EOM. In this case, the transmission ends, so E
It becomes OP.

On the other hand, in the unit 2 and the FAX 2, when the image signal is transmitted, the positive response MC to the EOM is still generated.
The FAX 2 is not ready to receive the image signal while the F is being transmitted. Therefore, the image signal is stored in the unit 2. Then, since the image signal of 700 bytes or more is accumulated, 20 ms between the mobile FAX side and the unit 2
A busy flag is set in the wireless communication frame received each time. After transmitting the post command, the portable FAX side monitors whether or not the busy flag is set in the received wireless communication frame (S8). During this time, the communication procedure on the unit 2 side proceeds, the training check TCF is completed, and image signal transmission is started. When the transmission of the image signal progresses and the image signal accumulated in the unit 2 becomes 300 bytes or less, the busy signal is stopped. In FIGS. 17 and 18, the position indicated by the arrow P with respect to the image signal indicates when the busy signal is stopped. When this busy signal is detected on the portable FAX side, the next process corresponding to the post command is transmitted (S9). The next process differs depending on the post command. The line disconnection command DCN is used for EOP, the phase B process is used for EOM, and MPS is used.
In response to this, the image signal on the next page is transmitted. It should be noted that the following processes are performed after a certain amount of time has passed since the stop of the busy flag was detected, in accordance with the procedure on the FAX 2 side. This allows the portable FAX side and the FAX 2 side to be synchronized. In the above-mentioned embodiment, since the post command is EOP, the disconnection of the line is almost synchronized, but if it is EOM, it can be almost synchronized by the procedure to enter phase B and the MPS in the transmission procedure on the next page. it can.

Next, a second embodiment will be described. In this embodiment, at the communication speed instructed from the mobile FAX 8 side to the FAX 6 side,
When communication between the FAX 6 and the base station 4 is not possible, it is possible to prevent the communication speed from being changed and the communication to be terminated, and to change the communication speed. As described in FIG. 9, the adapter and the facsimile are independent, and the RCR ST
Even when the D-27B standard is complied with, or when a portable FAX is used as shown in FIG. 11, after performing training check three times at a communication speed at which communication is not possible, the line is disconnected and the image signal cannot be transmitted.

FIG. 19 is a control procedure diagram of the second embodiment of the mobile phone F.
FIG. 20 is a communication procedure diagram showing the operation of the AX. In this embodiment, after the communication speed is instructed from the portable FAX, if the communication speed is incorrect, wait for a period until the training failure signal FTT arrives, and if there is nothing, the communication speed is correct and the image signal is transmitted to the FAX 6 side. To do. When the FTT signal arrives, the TCF error detection signal indicating that there is an error in the instructed communication speed is transmitted, and the communication speed is changed on the FAX 6 side (generally, the communication speed is reduced to the speed one step lower), and the training check TCF If the result is successful, FT
Because T does not come, after the time when FTT is issued,
The portable FAX 8 is adapted to transmit an image signal. When the FTT is transmitted, the TCF error detection signal is transmitted again and the FAX 6 side changes the communication speed. After changing to an appropriate communication speed in this way, the image signal is transmitted from the portable FAX side.

Next, this embodiment will be described with reference to FIGS. 19 and 20. 20, the unit 2 represents the adapter of the base station 4 shown in FIG. 1, and the FAX 2 represents the FAX 6 of FIG. When the portable FAX transmits a transmission terminal identification signal TSI and a DCS signal instructing the communication speed to the unit 2, the unit 2 transmits TSI and DCS to the FAX 2 and then transmits a training check TCF at the instructed communication speed.
If the training is successful, the FAX 2 sends a CFR indicating that the image signal may be sent, but if the communication speed is not proper, the FAX 2 sends a training failure signal FTT. This FTT is transmitted from the unit 2 to the mobile FAX. On the portable FAX side, after transmitting the TSI and DCS signals, it waits for a period until the FTT signal is returned in case of training failure. This waiting period is realized by a timer. TSI,
When the DCS signal is sent from the portable FAX (S11), the timer is started (S12). It is checked whether or not the FTT signal is transmitted from the unit 2 (S13). If the FTT signal is not received even if the time-out occurs (S14), it is determined that the communication speed is correct and the process shifts to phase C (S15) to transmit the image signal. If FTT signal is received during timer operation, F
The FTT counter that counts the number of incoming TTs is incremented by 1 (S16). The FTT counter is provided to identify the case where the communication speed is proper as described in FIGS. 9 and 11, but the FTT is transmitted due to a recoverable temporary cause. A value n is set in the FTT counter, and 1 to 3 are used as n. F when n = 1
This corresponds to the case where the TT counter is not used. When the count value of the FTT counter does not reach n (S17), the timer is started (S20), and it is checked whether or not the FTT signal is received during this period (S13).
14), transmit the image signal. In this way, when the count value of the FTT counter becomes n (S17), the FTT counter is cleared to zero (S18), and a TCF error detection signal for instructing the unit 2 to change the communication speed is transmitted (S1).
9). The operation period of the timer may be set based on the interval at which the unit 2 transmits the FTT. After transmitting the TCF error detection signal, the timer is started (S20), the communication speed is changed in the unit 2 and the training check TCF is performed. If it succeeds, the FTT signal does not come, so after a timeout (S14), the image signal is transmitted. (S15). If the training check TCF after changing the communication speed also fails, the FTT signal is received again, and step S13,
After repeating S16 to S20 and setting the proper communication speed,
Send the image signal.

The procedure of FIG. 19 will be specifically described with reference to FIG. When TSI and DCS are transmitted from the mobile FAX, the unit 2 transmits TSI and DCS to FAX2, and then D
Training check TC at the communication speed instructed by CS
However, since the communication speed is not appropriate, the training failure signal FTT is transmitted from the FAX 2 and is transmitted from the unit 2 to the portable FAX as it is. Mobile fax
Then, in response to the FTT, the TCF error detection signal is sent to the unit 2
Send to. In Unit 2 again to FAX2 TSI and D
Send CS. The procedure varies depending on how the DCS in this case is performed. In the case of FIG. 20, the communication speed of the DCS is determined at the time when the first FTT is transmitted by the unit 2, that is, at the time indicated by a.
Send to and train check TC at this same communication speed
FTT is issued again because he is doing F. DCS
Communication speed is determined at the time point indicated by b after receiving the TCF error detection signal, the communication speed is settled (for example, 7200 bp).
s to 4800 bps) and the training check may be successful. The portable FAX transmits the TCF error detection signal again for the second FTT. This time, the unit 2 sets DCS and TSI of communication speed
The fax is transmitted to the AX2, the training check TCF is performed at the dropped communication speed, and the FAX2 receives the CFR signal indicating that the training check is successful and the image signal may be transmitted. On the other hand, in the case of the mobile FAX, the FTT signal is not transmitted even after the time when the FTT signal is transmitted, so the training check is successful and the image signal is transmitted. If the training check TCF after changing the communication speed also fails, the communication speed is changed again and the training check TCF is continued until the communication speed becomes appropriate. As described above, according to the present embodiment, even if the communication speed is erroneously designated, it can be corrected, and the correct communication speed can be determined and the image signal can be transmitted.

Next, a third embodiment will be described. In this embodiment,
When the estimated communication speed of the wireless section is larger than the value specified by the DCS signal, the conventional method of lowering the communication speed by one step to the wireless section estimated communication speed is changed once. The estimated speed of the wireless section is estimated from the error signal retransmission history, but the communication speed specified by the DCS is determined so as to be compatible with the capability of the partner device for transmitting and its own function for transmitting. For this reason, the two often do not match. There is no problem if the wireless section estimated speed is higher than the DCS specified communication speed, but if it is smaller, the DCS specified communication speed needs to match the wireless section communication speed. As described with reference to FIG. 12, the facsimile independently operates the RCR STD-
Both in the case of complying with the standard of 27B and in the case of using the portable FAX as shown in FIG. 14, the communication speed is reduced step by step to perform the training check so that the wireless section estimated speed is reached, which takes time. .

FIG. 21 is a control procedure diagram of the third embodiment of the mobile phone F.
FIG. 22 is a communication procedure diagram showing the operation of the AX. FIG.
The unit 2 shown in FIG. 2 is an adapter of the base station 4 shown in FIG.
AX2 represents FAX6 in FIG. In the case of facsimile transmission in FIG. 21, the digital identification signal DIS indicating the communication function of the other party (FAX2 side) is received (S31).
Next, a DCS that defines a communication speed suitable for both is created based on the setting capability of the portable FAX and the contents of the DIS (S3).
2). In addition, the portable FAX counts the number of error frames of wireless communication frames received in the past 5 seconds, and estimates the communication speed of the wireless section from this value. It is checked whether or not the DCS designated speed is higher than the wireless section estimated speed (S33). If it is not larger, the DCS value is unchanged, and if it is larger, the DCS designated speed is rewritten to the wireless section estimated speed (S3).
4). In this way, the designated communication speed of DCS is determined and transmitted (S35). As a result, since the communication speed is appropriate, it is possible to shift to phase C for transmitting the image signal (S3
6).

In FIG. 22, when the DIS2, the called terminal identification signal CSI and the non-standard function identification signal NSF are transmitted from the FAX 2 to the unit 2, the unit 2 sends the portable FAX.
CSI and DIS are transmitted to. Unit 2 is FA
Retransmission request signal C even if the signal received from X2 is not incorrect
RP may be sent. On the portable FAX side, a communication speed that is not higher than the wireless section estimated speed is determined by the procedure shown in FIG. 21 and is represented by DCS, which is transmitted to the unit 2 together with TSI, and the image signal is also transmitted subsequently. Unit 2
Then, when the TSI and DCS are received, the training check TCF is transmitted at the communication speed designated by the DCS.
On the other hand, FAX2 sends an acknowledgment signal CF to start image signal transmission.
When R is issued, the image signal that has been sent from the portable FAX to the FAX 2 from the unit 2 and has been accumulated is transmitted. As a result, the communication speed can be set quickly.

[0050]

As is apparent from the above description, the present invention has the following effects. By transmitting the image signal with a predetermined amount or more and knowing when the processing on the receiving side is advanced and the next processing can be started by clearing the busy flag, the post commands EOP, E
The timing of the next operation of the OM and MPS can be almost synchronized between the mobile facsimile and the adapter side. Even if communication is not possible on the other party's line at the communication speed instructed to the receiving side on the mobile facsimile side, the TCF error detection signal is transmitted in response to the FTT signal and the DCS signal is changed to the adapter side to ensure proper communication. Correct to speed and enable transmission of image signals. When the DCS instructed communication speed is higher than the wireless section estimated speed, since the DCS instructed communication speed is rewritten to the wireless section estimated speed and then transmitted, there is no need to change the DCS instructed communication speed stepwise as in the conventional case, and the communication time Is shortened.

[Brief description of drawings]

FIG. 1 is a diagram showing a communication system according to an embodiment.

FIG. 2 is a block diagram showing the configuration of a portable facsimile device.

FIG. 3 is a diagram showing a wireless communication frame.

FIG. 4 is a diagram showing a communication system according to the RCR STD-27B standard.

FIG. 5 is a procedure diagram in which an EOP signal is used according to the RCR STD-27B standard.

FIG. 6 is a procedure diagram in which an MPS signal is used according to the RCR STD-27B standard.

FIG. 7 is a procedure diagram in which an EOM signal is used according to the RCR STD-27B standard.

FIG. 8 is a diagram showing a problem when a portable facsimile including an adapter is used for RCR STD-27B standard communication.

FIG. 9 is a procedure diagram for processing a training check failure according to the RCR STD-27B standard.

FIG. 10 is a procedure diagram when the training check is successful according to the RCR STD-27B standard.

FIG. 11 is a diagram showing a case where a portable facsimile machine with a built-in adapter is used for RCR STD-27B standard communication.

FIG. 12 is a communication speed correction processing procedure diagram when the DCS designated speed is higher than the wireless section estimated speed according to the RCR STD-27B standard.

FIG. 13 is a processing procedure diagram when the DCS designated speed is not higher than the wireless section estimated speed according to the RCR STD-27B standard.

FIG. 14 is a processing procedure diagram in the case of using a portable facsimile including an adapter when the specified DCS speed is higher than the estimated wireless section speed according to the RCR STD-27B standard.

FIG. 15 is a processing procedure diagram in the case of using a portable facsimile including an adapter when the specified DCS speed is not higher than the estimated wireless section speed according to the RCR STD-27B standard.

FIG. 16 is a control procedure diagram of the first embodiment.

FIG. 17 is a diagram showing a case where the image signal of the final page is 700 bytes or more in the communication procedure of the first embodiment.

FIG. 18 is a diagram showing a case where the image signal of the final page is less than 700 bytes in the communication procedure of the first embodiment.

FIG. 19 is a control procedure diagram of the second embodiment.

FIG. 20 is a communication procedure diagram of the second embodiment.

FIG. 21 is a control procedure diagram of the third embodiment.

FIG. 22 is a communication procedure diagram of the third embodiment.

[Explanation of symbols]

 3 Digital Mobile Phone 4 Base Station 5 Public Network 6 Facsimile 7 Telephone 8 Mobile Facsimile Device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Gosei Yoshikawa 2-10-1 Toranomon, Minato-ku, Tokyo NTay Tei Mobile Communication Network Opportunity Company

Claims (7)

[Claims] 1. A transmitting means for transmitting image information to a communication terminal connected through an adapter which transmits a busy signal when protocol conversion between a wireless device and a facsimile is performed on a wireless telephone and a predetermined amount of image information is received. And counting means for counting the amount of image information transmitted by the transmitting means, and when the amount of image information counted by the counting means does not reach the predetermined amount, dummy information is added to make the image more than the predetermined amount. After transmitting the information, and after transmitting any of the post commands (EOP, MPS, EOM) according to the processing condition next to the image information transmission to the image information, the stop of the busy signal is detected and the post is performed. A communication device comprising: a control unit that performs the next process corresponding to a command. 2. The communication device according to claim 1, wherein the dummy information is transmitted using the same signal frame as a signal frame for transmitting the image information. 3. The dummy information is added after the control return signal (RTC) added at the end of the image information, and is added until the total capacity with the image information reaches a predetermined amount. Item 2. The communication device according to item 2. 4. A transmission means for transmitting image information to a communication terminal connected to a wireless telephone via an adapter for protocol conversion between a wireless device and a facsimile, and a training failure signal transmitted from the communication terminal side. (FTT signal) detecting means, and when the detecting means does not detect the FTT signal even after a predetermined time has elapsed since the transmitting means transmitted the DCS signal indicating the communication speed, the image information is transmitted. A communication device comprising: a control unit for instructing a transmission unit. 5. Transmission means for transmitting image information to a communication terminal connected to a wireless telephone via an adapter for protocol conversion between a wireless device and a facsimile, and a training failure signal transmitted from the communication terminal side. (FTT signal) detecting means, and the detecting means detects the FTT signal within a predetermined time from when the transmitting means transmits the DCS signal indicating the communication speed, and further within 1 set time.
When the FTT signal is detected a predetermined number of times continuously for each set time, the transmitting means transmits a signal (TCF error detection signal) indicating that the communication speed indicated by the DCS signal has an error. A communication device comprising: 6. Transmission means for transmitting image information to a communication terminal connected to a wireless telephone via an adapter for protocol conversion between a wireless device and a facsimile, and a training failure signal transmitted from the communication terminal side. (FTT signal) detecting means, and the detecting means detects the FTT signal within a predetermined time from when the transmitting means transmits the DCS signal indicating the communication speed, and further within 1 set time.
A communication device comprising control means for instructing the transmission means to transmit image information when the FTT signal is detected continuously for each set time but the predetermined number of times has not been reached. 7. A transmission means for transmitting image information to a communication terminal connected to a wireless telephone via an adapter for protocol conversion between a wireless device and a facsimile, and the communication means on the communication terminal side. If the communication speed is faster than the wireless section estimated speed estimated by the communication error history of the image information, the communication including a control means for instructing the transmitting means to transmit the wireless section estimated speed as a communication speed by a DCS signal. apparatus.