JPH08242354A - Facsimile communication method and facsimile equipment - Google Patents

Abstract

PURPOSE: To shorten communication time for poling or the substitution of transmission/ reception by receiving a transmission/reception substituting signal from a calling station by a called station and transmitting an instruction signal in which a parameter required to be transmitted from the called station is set up. CONSTITUTION: When an opposite equipment corresponding to an abbreviated dial operated by a RAM 2 in a self-equipment has abbreviated protocol receiving capacity, a reference protocol is changed to an abbreviated protocol in which a communication procedure is abbreviated and then a transmission/reception substituting signal for instructing the substitution of transmission/reception is transmitted from the calling station. The called station receives the transmission/reception substituting signal from the calling station and transmits an instruction signal in which a parameter required to be transmitted from the called station is set up. The calling station receives the instruction signal from the called station, transmits an identification signal in which a parameter indicating the receiving capacity of the calling station is set up to the called station, determines a parameter to be transmitted and a receiving capacity parameter and receives picture information based upon the determined communication parameters. Consequently communication time for poling can be shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile communication method and a facsimile apparatus, and more particularly to a facsimile communication method and a facsimile apparatus in which the time of a communication procedure (protocol) performed before transmitting / receiving image information is shortened.

[0002]

2. Description of the Related Art In a conventional facsimile apparatus, ITU-T (former CCITT) is used as a document facsimile communication procedure in a general telephone exchange network.
Recommendation T. Facsimile communication is performed according to the transmission control procedure standardized by the standard 30. This ITU-T
Recommendation T. In the procedure of 30, the receiving side (calling station) assumes that the calling side (calling station) is both the own machine or another company's machine, and the non-standard function command signal for the own machine and the standard digital identification signal Since both were transmitted, there was a problem that the communication procedure performed before transmitting / receiving the image information took time.

Therefore, conventionally, the following techniques have been proposed in order to reduce the time required for communication procedures.

In Japanese Patent Laid-Open No. 3-154566, when a polarity reversal is detected, an NSS (non-standard function setting signal) of 300 bps is transmitted, and when the polarity reversal cannot be detected and a CED (called terminal identification signal) is detected. Send tone and CED
Is described and a technique of sending NSS of 300 bps is described. In this technique, NSF (non-standard function identification signal) is omitted, so that N
The FIF (facsimile information field) of SF is stored and the stored contents are negotiated to determine the communication parameters. Regarding the transmission rate of the image information, the transmission station stores the transmission rate history, omits the transmission of the TCF (training check signal), and receives the CFR (reception preparation confirmation signal). Image information is being sent.

However, with this technique, 300 bp
Since the NSF and TCF of s are omitted and the protocol time is shortened a long time ago, there is a problem that only the procedure for transmission is considered and polling of the shortened protocol cannot be performed.

Japanese Unexamined Patent Publication (Kokai) No. 3-205958 discloses 30
A technique is described in which a communication speed is set to 0 bps NSF, a transmitting side transmits a high-speed NSS at the communication speed, and subsequently framed image information is also transmitted. With this technology, with regard to the communication speed, it is possible to perform communication at the highest speed among the reception capabilities of NSF or DIS. And NS
When an FCS (frame check sequence) error occurs in S, the receiving side transmits a tone to that effect, and the transmitting side retransmits a high-speed NSS. Further, in Japanese Laid-Open Patent Publication No. 5-219334, when a CED is detected, the calling side sends a unique tone (DTMF) that also serves as a notification of the transmission rate of image information, and the CED is stopped.
A technique for transmitting a 300 bps NSF (NSF excluding the item of essential capability) for the shortened protocol is described. Then, before transmitting the image information, the parameter of the image information is transmitted at a high speed at the transmission rate notified by this unique tone, and then the image information is transmitted.

However, these techniques have a problem that only transmission is taken into consideration and polling is not described.

Further, Japanese Patent Laid-Open No. 1-321774 and Japanese Patent Laid-Open No. 3-112559 disclose a general polling technique.

However, in these techniques, only the polling is described, so that there is a problem that the time of the communication procedure cannot be shortened.

As described above, a polling procedure as a shortened protocol has not been proposed, and the communication procedure time cannot be shortened by simply combining the above techniques.

Incidentally, Japanese Patent Application Laid-Open No. 60-26342 describes a technique for exchanging transmission / reception by transmitting a transmission right shift signal from a transmitting station to a receiving station.

However, in this technique, there is no description about negotiation when transmission and reception alternate, so that there is a problem that the parameter of image information transmitted after transmission and reception replacement cannot be transmitted to the receiver.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a facsimile communication method and a facsimile apparatus capable of shortening the communication time when polling or transmission / reception switching is performed. .

[0014]

In order to achieve the above object, the invention of claim 1 is a facsimile communication method in which a calling station polls and receives image information from a called station. After switching to the shortened protocol, which shortens the communication procedure time from the protocol, the calling station sends a transmission / reception change signal instructing the transmission / reception change, and the called station receives the transmission / reception change signal from the calling station. Then, the called station transmits a command signal in which the desired parameter is set, the calling station receives the command signal from the called station, and the called station receives the identification signal in which the receiving station's reception capability parameter is set. The communication parameter is determined based on the desired transmission parameter and the reception capability parameter, and the image information is received with the determined communication parameter.

A second aspect of the present invention is a facsimile communication method in which a transmitting station that has transmitted image information transmits image information and then receives image information from the receiving station. A post message signal indicating the end is transmitted, the receiving station receives the post message signal from the transmitting station, transmits a confirmation signal indicating that the reception of the post message signal is confirmed, and the transmitting station transmits a confirmation signal from the receiving station. Received
Sending a transmission / reception change signal that instructs transmission / reception change, the receiving station receives the transmission / reception change signal from the transmitting station, and the receiving station transmits the command signal in which the parameter to be transmitted is set. Of the command signal of the transmitting station, the identification signal in which the parameter of the receiving capability of the transmitting station is set is transmitted to the receiving station, and the communication parameter is determined based on the parameter to be transmitted and the parameter of the receiving capability, and the determined communication The image information is received as a parameter.

According to a third aspect of the present invention, there is provided a facsimile device which receives image information from a partner device by polling, and a transmission / reception change signal for instructing a change of transmission / reception is shortened in communication procedure time as compared with the standard protocol. The transmission / reception exchange signal transmitting means for transmitting with the shortened protocol, the command signal receiving means for receiving the command signal with the parameter desired to be transmitted from the partner device according to the shortened protocol, and the identification signal with the parameter for the receiving capability set It is configured to include an identification signal transmitting means for transmitting by a shortened protocol and a communication parameter determining means for determining a communication parameter based on the parameter to be transmitted and the parameter of the receiving ability.

According to a fourth aspect of the present invention, there is provided a facsimile apparatus which is poled to transmit image information to a partner machine, and a transmission / reception change signal for instructing a transmission / reception change from the partner machine is transmitted from a standard protocol in a communication procedure time. Transmission / reception exchange signal receiving means for receiving by the shortened shortened protocol, command signal transmitting means for transmitting a command signal with the parameter to be transmitted set with the shortened protocol, and identification signal with the parameter of the receiving ability from the partner machine set. And an identification signal receiving means for receiving the communication parameter according to the shortened protocol, and a communication parameter determining means for determining a communication parameter based on the parameter to be transmitted and the parameter of the receiving capability.

According to a fifth aspect of the present invention, there is provided a facsimile apparatus for receiving image information from a partner machine after transmitting the image information, and transmitting a post message signal for transmitting a post message signal indicating the end of the transmission of the image information. Means, a confirmation signal receiving means for receiving a confirmation signal indicating that the reception of the post message signal from the partner device has been confirmed, and a transmission / reception exchange signal for instructing transmission / reception exchange, which shortens the communication procedure time from the standard protocol. The transmission / reception exchange signal transmitting means for transmitting with the shortened protocol, the command signal receiving means for receiving the command signal with the parameter desired to be transmitted from the partner device according to the shortened protocol, and the identification signal with the parameter for the receiving capability set Based on the identification signal transmitting means for transmitting by the shortened protocol, the parameter to be transmitted and the parameter of the receiving ability, A communication parameter determination means for determining a signal parameter, which is constituted contains.

According to a sixth aspect of the present invention, there is provided a facsimile apparatus which transmits image information to a partner machine after receiving the image information, and receives a post message signal from the partner machine which indicates the end of the transmission of the image information. The post message receiving means, the confirmation signal transmitting means for transmitting the confirmation signal indicating that the reception of the post message signal has been confirmed, and the transmission / reception exchange signal for instructing the exchange of transmission / reception from the partner device are transmitted from the standard protocol in the communication procedure The transmission / reception exchange signal receiving means for receiving in the shortened protocol, the command signal transmitting means for transmitting the command signal in which the parameter to be transmitted is set in the shortened protocol, and the identification in which the parameter of the receiving ability from the partner device is set Based on the identification signal receiving means for receiving a signal by the shortened protocol, the parameter to be transmitted and the parameter of the receiving capability. There are, in which configured to include a communication parameter determination means for determining a communication parameter, a.

[0020]

According to the present invention, the transmission / reception change signal instructing the change of transmission / reception is transmitted from the calling station after shifting to the shortened protocol in which the communication procedure is shortened from the standard protocol. The called station receives the transmission / reception change signal from the calling station, and sends the command signal in which the parameters desired to be sent by the called station are set. At the calling station, the command signal from the called station is received, and the identification signal in which the parameter of the receiving station's receiving capability is set is transmitted to the called station, and based on the parameter to be transmitted and the parameter of the receiving capability. The communication parameter is determined, and the image information is received with the determined communication parameter. In this way, after the call receiving station receives the transmission / reception signal from the calling station, it sends the command signal in which the parameters that the called station wants to send are set. It is not necessary to transmit both the non-standard function command signal and the standard digital identification signal assuming both of the other companies' machines, and the communication time at the time of polling can be shortened.

According to the second aspect of the invention, the transmitting station transmits the post message signal indicating the end of the transmission of the image information. The receiving station receives the post message signal from the transmitting station and transmits a confirmation signal indicating that the reception of the post message signal has been confirmed. The transmitting station receives the confirmation signal from the receiving station and transmits a transmission / reception change signal instructing transmission / reception change. The receiving station receives the transmission / reception change signal from the transmitting station, and transmits the command signal in which the parameter desired to be transmitted by the receiving station is set. The transmitting station receives the command signal from the receiving station, transmits an identification signal in which the parameter of the receiving station's receiving capability is set, to the receiving station, and determines the communication parameter based on the parameter to be transmitted and the parameter of the receiving capability. Then, the image information is received with the determined communication parameter. In this way, after the receiving station receives the transmission / reception change signal from the transmitting station, it sends the command signal with the parameters that the receiving station wants to send. Assuming that it is not necessary to transmit both the non-standard function command signal and the standard digital identification signal, it is possible to shorten the communication time at the time of transmission / reception exchange.

According to the third aspect of the present invention, the transmission / reception exchange signal transmitting means transmits the transmission / reception exchange signal instructing the transmission / reception exchange by the shortened protocol in which the communication procedure time is shorter than the standard protocol. The command signal receiving means receives a command signal from the partner device in which a parameter desired to be set is set by the shortened protocol. The identification signal transmitting means transmits the identification signal in which the parameter of the receiving ability is set by the shortening protocol. The communication parameter determining means determines the communication parameter based on the parameter to be transmitted and the parameter of the receiving capability.

According to the invention of claim 4, the transmission / reception exchange signal receiving means receives the transmission / reception exchange signal instructing the transmission / reception exchange from the partner device by the shortened protocol in which the communication procedure time is shortened from the standard protocol. The command signal transmitting means transmits the command signal in which the parameter desired to be transmitted is set by the shortened protocol. The identification signal receiving means receives the identification signal in which the parameter of the reception capability from the partner device is set by the shortening protocol. The communication parameter determining means determines the communication parameter based on the parameter to be transmitted and the parameter of the receiving capability.

According to the invention of claim 5, the post message transmitting means transmits the post message signal indicating the end of the transmission of the image information. The confirmation signal receiving means receives a confirmation signal indicating that the reception of the post message signal from the partner device is confirmed. The transmission / reception change signal transmission means transmits a transmission / reception change signal instructing the change of transmission / reception by a shortened protocol in which the time of the communication procedure is shortened from the standard protocol. The command signal receiving means receives a command signal from the partner device in which a parameter desired to be set is set by the shortened protocol. The identification signal transmitting means transmits the identification signal in which the parameter of the receiving ability is set by the shortening protocol. The communication parameter determining means determines the communication parameter based on the parameter to be transmitted and the parameter of the receiving capability.

According to the invention of claim 6, the post message receiving means receives the post message signal indicating the end of the transmission of the image information from the partner machine. The confirmation signal transmitting means transmits a confirmation signal indicating that the reception of the post message signal has been confirmed. The transmission / reception exchange signal receiving means receives a transmission / reception exchange signal from the other device instructing transmission / reception exchange by a shortened protocol in which the communication procedure time is shorter than the standard protocol.
The command signal transmitting means transmits the command signal in which the parameter desired to be transmitted is set by the shortened protocol. The identification signal receiving means receives the identification signal in which the parameter of the reception capability from the partner device is set by the shortening protocol. The communication parameter determining means determines the communication parameter based on the parameter to be transmitted and the parameter of the receiving capability.

[0026]

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

FIG. 1 is a block diagram of the entire facsimile apparatus for carrying out the facsimile communication method according to the present invention. This facsimile machine includes a CPU 1 for controlling the entire facsimile machine, a RAM 2 as a work area used when executing a control program, an operation display device 3 provided with a display and operation switches for operating the facsimile machine, and a transmission document. Reading device 4 for reading, printing device 5 for printing and outputting received image information, encoding / decoding, etc.
An image processing device 6 that performs image processing such as enlargement / reduction, an image storage device 7 that stores image information to be transmitted or received image information, and a system control unit 8 including a ROM that stores a program that controls the entire facsimile device. , A communication (eg G) suitable for a digital network (eg ISDN network)
4) a first communication control unit 9 composed of a ROM storing a program for controlling the analog network (for example,
G3) a second communication control unit 10 composed of a ROM storing a program for controlling communication, a digital network control device 11 for connecting to a digital network,
And a line switching control device 15 for connecting a plurality of external line interfaces and a plurality of internal communication circuits by switching, and these are connected to each other by a system bus 14.

The first communication controller 9 is connected to the direct line switching controller 15 and the second communication controller 1 is connected.
0 is mutually connected to the line switching control device 15 via a modem (modulation / demodulation device) 12 having a low speed mode and a high speed mode. The line switching control device 15 is mutually connected to the digital network control device 11 and the analog network control device 13.

The facsimile machine having the above-mentioned structure is connected to a partner machine such as a facsimile machine having the same structure as the above, a facsimile machine connectable only to an analog network, and a facsimile machine connectable only to a digital network through a line. It The first communication control unit 9 and the digital network control unit 11 can be omitted when the facsimile apparatus is connected only to the analog network, and the second communication control unit 9 and the digital network control apparatus 11 can be omitted when the facsimile apparatus is connected only to the digital network. Control unit 10, modem 1
2 and the analog network controller 13 can be omitted.

In the facsimile communication method of this embodiment, the transmission is switched to the shortened protocol mode in the following cases (1) to (3). (1) When the partner device is stored as having the capability of receiving the shortened protocol and the partner device has the polarity reversal detection function, and the polarity reversal is detected (transmission shift case 1). (2) CED before polarity reversal is detected in (1)
When the CED is detected, or when the other device is stored as having the ability to receive the shortened protocol and the other device does not have the polarity reversal detection function, the CED of the CED is transmitted while transmitting (transmitting) the CNG (calling tone). When detection is performed and CED is detected (transmission case 2). (3) When the partner machine stores that there is no shortened protocol reception capability, the CED or command is detected while sending CNG, and it is determined from the received NSF command of the own machine that it has the shortened protocol reception capability. In the case (transmission case 3).

Further, at the time of reception, the mode shifts to the shortened protocol mode in the following cases (1) to (3). (1) When a signal for instructing the transition to the shortened protocol mode is received between the arrival of the call and the transmission of the CED (transition case at reception 1). (2) When the CED must be sent without receiving the signal instructing the transition to the shortened protocol mode after receiving the call, the signal instructing the transition to the shortened protocol mode is received while transmitting the CED. Then, when CED transmission is stopped (reception time transition case 2). (3) When the CED must be transmitted without receiving the signal instructing the transition to the shortened protocol mode after receiving the call, receiving the signal instructing the transition to the shortened protocol mode while transmitting the CED Was checked, but C did not receive the signal instructing the transition to the shortened protocol mode.
When ED transmission is stopped, NSF command and DIS command (with C if necessary
(SI command) and a signal instructing the shift to the shortened protocol mode is received in response thereto (transition case 3 at the time of reception).

Next, the procedure of facsimile communication according to the shortened protocol will be described in detail with reference to FIGS.
First, the transmission protocol will be described with reference to FIGS.

In step 100 of FIG. 2, the stored telephone number is read according to the speed dial operated by the operation display device 3 to make a call, and steps 102, 1
In 04, it is determined whether or not it is stored in the RAM 2 of the own device that the other device has the abbreviated protocol reception capability according to the operated speed dial. When it is stored that the shortened protocol reception capability is present, a transmission phase A (FIG. 3) described later is executed in step 106.

In the next step 108, it is judged whether or not the transmission is in the shortened protocol mode. If the transmission is not in the shortened protocol mode, that is, in the normal transmission mode, the process proceeds to step 128, and in the case of transmission in the shortened protocol mode. Executes a transmission phase B (FIG. 4) described later in step 110, and determines in step 112 whether or not the transmission is in the shortened protocol mode. In the case of the normal transmission mode, the process proceeds to step 128. In the case of transmission in the shortened protocol mode, the transmission phase C (FIG. 5) described later is executed in step 114, and the transmission phase D (FIG. 6) described later is executed in step 116.

In step 118, it is judged whether or not to shift to the transmission phase C, and if affirmative, step 114
If it is negative, it is judged in step 120 whether or not to shift to the transmission phase B. If it is positive, the routine proceeds to step 110. If it is negative, that is, if it shifts to phase E, in step 122. A low-speed DCN (switching command signal) is sent to complete the transmission.

On the other hand, if it is not stored in step 104 that the shortened protocol reception capability is stored, step 124
CNG is sent in step 12, and while sending CNG, step 12
In step 6, it is determined whether or not a CED or command has been received. If affirmative, in step 128 it is determined whether or not NSF has been received. If NSF is received,
In step 130, it is determined whether the NSF is manufactured by the same manufacturing company as the own device, and if the NSF is manufactured by the same manufacturing company as the own device, it is determined in step 132 whether the shortened protocol reception capability is available. If the shortened protocol reception capability is present, the speed reduction dial corresponding to the shortened protocol is stored in the RAM 2 in step 134, and the mode is shifted to the shortened protocol mode, and the process proceeds to step 110.

The shift to the shortened protocol mode after storing the capability of receiving the shortened protocol in step 134 corresponds to the above-mentioned shift case at transmission 3 (FIG. 13).

When it is judged in step 128 that the NSF is not received, that is, when the DIS (digital identification signal) is received, and the judgments in steps 130 and 132 are negative, in step 136, the shortening protocol is set in correspondence with the shortening dial. It stores in the RAM 2 that there is no reception capability, and shifts to the normal transmission mode in step 138.

The transmission phase A will be described with reference to FIG. At step 140, it is judged whether or not the partner machine has the polarity reversing function based on the information stored in the RAM 2. If the opposite machine has the polarity reversing function, at step 142 C
The NG transmission start timer is started, and it is determined in step 144 whether polarity reversal is detected. If the polarity reversal is not detected, the polarity reversal is detected in step 144 until it is determined in step 146 that a timeout has occurred. Then, when the polarity reversal is detected, in step 156, the mode is changed to the shortened protocol mode, and the shortened protocol is executed as described later.

On the other hand, when the CNG transmission start timer times out in step 146, C in step 148
NG is sent, and it is determined in step 150 whether the polarity reversal is detected. When the polarity reversal is detected, in step 156, the mode is changed to the shortened protocol mode to execute the shortened protocol described later.

The transition to the shortened protocol mode when the polarity reversal in steps 144 and 150 is detected corresponds to the transmission transition case 1 (FIG. 11).

If the polarity inversion is not detected in step 150, it is determined in step 152 whether or not the CED is received, and if it is received, the process is shifted to the shortened protocol mode in step 156.

If the CED is not received in step 152, it is judged in step 154 whether or not the low speed command is received. If it is received, the normal transmission mode is entered in step 164, and if it is not received. In step 148, CNG transmission is continued.

If it is determined in step 140 that the polarity reversal function is not available, CNG is transmitted in step 158, and it is determined in step 160 whether CED has been received.
If a CED is received, then in step 156 the mode is transferred to the shortened protocol mode.

The transition to the shortened protocol mode when the CED is received in steps 152 and 160 corresponds to the transmission transition case 2 (FIG. 12).

If the CED is not received in step 160, it is judged in step 162 whether or not the low speed command is received. If it is received, the normal transmission mode is entered in step 164, and if it is not received. In step 158, CNG transmission is continued.

The transmission phase B will be described with reference to FIG. In step 170, it is determined whether polling is performed. In the case of polling, the procedure from step 190 is executed,
If it is not polling, in step 172, a signal indicating the transmission speed (communication speed) of the next high speed NSS command (command signal in which the parameter to be transmitted is set) is transmitted, and in step 174, the high speed NSS is transmitted at this transmission speed. Then, in step 176, it is determined whether or not a response from the partner machine is received. The receiving side receives the signal indicating the transmission rate of the high-speed NSS command transmitted in step 172, and shifts to the shortened protocol mode as described later.

When the response is received, it is judged in step 178 whether the response received is the high speed NSF (identification signal in which the parameter of the receiving capability is set), and when the high speed NSF is received, the step 180 is executed. When the high speed NSF is not received, for example, when a low speed command such as NSF / DIS is received, the process shifts to the normal transmission mode in step 182.

When the partner machine has the polarity reversal function, the polarity reversal is detected while waiting for the response, and when the response waiting time-out and the polarity reversal are detected, the process from step 176 is started. Step 184
If the polarity reversal is detected, the initial value of the transmission rate is reset in step 188. If the polarity reversal is not detected, the fallback parameter is set in step 186 and the process returns to step 172.

In the case of polling, a signal indicating the transmission speed of the next high speed NSC (non-standard function command signal) command is transmitted in step 190, the high speed NSS is transmitted at this speed in step 192, and the partner is transmitted in step 194. It is determined whether a response from the machine has been received. When the response is received, it is determined in step 196 whether or not the high speed NSS is received from the partner device, and when the high speed NSS is received, the reception phase B (FIG. 8) described later is executed in step 192. However, when the high speed NSS is not received, for example, when the low speed command such as NSF / DIS is received, in step 200, the normal transmission mode is entered.

Similarly to the above, when the partner machine has the polarity reversal function, the polarity reversal is detected even when waiting for the response reception, and when the response waiting time-out and the polarity reversal are detected. Advances from step 194 to step 202. If polarity reversal is detected, the initial value of the transmission rate is reset in step 206. If polarity reversal is not detected, the fallback parameter is set in step 204 and the step is set. Return to 190.

The transmission phase C will be described with reference to FIG. In the transmission phase C, the frame is divided into frames by ECM (error correction), and the first frame (frame No.
0) sets the parameter or NSS information indicating the image information of the second and subsequent frames following the first frame, sets the image information (for example, the image information of one page in one frame) in the second and subsequent frames, and sends it. To do.

In step 210, it is determined whether or not the image information is retransmitted. If the image information is retransmitted, in step 212, the image information to be retransmitted is set in the frame and transmitted, and then step 214
If it is determined that the retransmission has been completed, the process proceeds to step 222.

If the image information is not retransmitted, step 21
Frame No. 6 The NSS information transmitted earlier is set to 0 and transmitted. In this case, the frame No. The information to be set to 0 may be the NSS information itself that has been transmitted previously, or may be only the parameter indicating the image information that is to be transmitted. In this way, the NSS and parameters are sent as image information, so that it is possible to send at high speed.
In step 218, the image information is set and transmitted in the second and subsequent frames, and when it is determined in step 220 that the image information transmission is completed, the process proceeds to step 222.

In step 222, the post message command P. M. An RCP (partial page control return) frame in which the content of C is set is sent, and the process advances to phase D, which waits for the next response command.

The transmission phase D will be described with reference to FIG. In step 400, it is determined whether or not it is the final page, and if it is not the final page, it is determined in step 402 whether or not the mode is changed. When changing the mode, in step 408, PPS / EOM (partial page signal / message end signal) is sent to the partner machine and step 4 is executed.
If the mode is not changed, the PPS / MPS (partial page signal / multi-page signal) is transmitted in step 404, and the process proceeds to phase C (FIG. 5) in step 406. . If it is the final page in step 400, it is determined whether or not to receive the image information from the partner machine subsequent to the transmission. If not received, PPS / EOP (partial page signal / procedure end signal) is sent to the partner machine in step 414, and the process proceeds to phase D in step 416. If received, step 41
At 8, the PPS / EOM is sent to the partner machine as a post message command. When the ECM communication is used, the post message command may be included in RCP (return to partial page control) of the image information (see FIG. 16A).
Normally, the RCP frame has a flag field F, an address field A, a control field C, a partial page control return RCP, and a facsimile check sequence F.
Although the CS field and the flag field F are configured in this order (see FIG. 16B), as shown in FIG. 16C, a post message command is sent between the partial page control return RCP and the facsimile check sequence FCS. Just insert it.

In FIG. 16C, P. No,
B. No and F. No. is a parameter of the post message command (PPS / EOM in FIG. 16C) at the time of ECM communication. No is the page number indicating the number of pages of the immediately preceding image information, and B. No is a block number indicating the number of blocks of the immediately preceding image information (0 if there is no block division), F. No is a frame number indicating the number of frames of the immediately preceding image information. F. The maximum number of frames of No. 1 block is 64 or 256 frames, and DCS or NS
Specified by S. If the number of frames of one page exceeds this value, the block is divided. The amount of data in one frame is 25
It is 6 bits.

In step 420, it is determined whether or not a response from the other device is received. If a response is received, it is determined whether or not the response received in step 424 is a low speed MCF (message confirmation signal). to decide. If no response is received, step 42
2 sends PPS / EOM. In addition, this step 4
In ITU-T Recommendation T.22. As defined in the procedure of No. 30, when PPS / EOM is transmitted up to 3 times and the T4 timer times out, DCN is transmitted and communication is interrupted.

If it is determined in step 424 that the response received is not a low speed MCF, step 43
It is determined whether the response received in step 8 is a low speed PPR (partial page request), and if it is not the low speed PPR, the response received in step 462 is a low speed PIP.
(Procedure interruption positive signal) is determined. If the received response is a slow PIP, step 46.
In step 4, the line hold procedure is executed. If the received response is not the low-speed PIP, error processing is executed in step 466, and the process proceeds to phase E in step 468.

If it is determined that the response received in step 438 is a low speed PPR, step 440
In step 442, it is determined whether or not it is necessary to send CTC (continuation of correction), and if it is necessary, in step 444, the slow CTC is sent until it is judged that low-speed CTR (correction continuation response) is received. When the low speed CTR is received, the transmission phase C is entered in step 446.

If it is determined in step 440 that CTC transmission is unnecessary, it is determined in step 448 whether EOR (retransmission end) transmission is necessary. If not, step 450 is followed by phase C. After shifting, if necessary, low-speed EOR is sent out in step 452, and then step 454
Then, it is determined whether or not the low speed ERR (retransmission end response) is received. If a slow ERR is received, step 4
If the low-speed ERR is not received at step 56 in step 56, it is determined in step 458 whether the low-speed PIN (procedure interruption negative signal) is received. If the PIN is not received, the process returns to step 452 and EOR EOM
Is sent. In this step 458, ITU-
Recommendation T. EOR, as defined in the 30 procedures
-When EOM is sent up to 3 times and the T4 timer times out, DCN is sent and communication is interrupted. If the PIN is received, line hold processing is performed in step 460.

If it is determined in step 424 that the response received is low speed MCF, step 42
In step 6, a signal indicating the transmission speed of the next high speed command is transmitted, and in step 428, a high speed NSC command is transmitted. Next, in step 430, it is determined whether or not a response has been received from the partner device. When the determination is negative, the process returns to step 426. On the other hand, when the determination is affirmative, it is determined in the next step 432 whether or not a high-speed NSS is received. When the high-speed NSS is received, the high-speed NSF is transmitted to the partner device in step 433, and the reception phase B (FIG. 8) is executed in step 434. When the high-speed NSS is not received, the phase E is entered. In this way, the transmission / reception exchange can be performed by the shortened protocol.

FIG. 14 shows a signal sequence of the transmission / reception change procedure of the transmission phase D. Further, if the parameter indicating the receiving capability is set in the NSC sent in step 428, the procedure of sending the NSF in step 433 can be omitted. In this case, the signal of the transmission / reception changing procedure of the transmission phase D can be omitted. The sequence is shown in FIG. In FIGS. 14 and 15, the RCP frame (PPS / MOM) is the PPS of the post message command in the RCP frame.
-Indicates that MOM is set, and FCD frame (PI
X) indicates that the image information PIX is set in the FCD frame.

If a parameter indicating the receiving capability of the calling station is set in the NSF, the parameter need not be added to the NSC.

Next, the reception protocol will be described with reference to FIGS. When it is determined in step 270 in FIG. 7 that an incoming call has been received, a 1.8-second timer is started in step 272, and a signal instructing the transition to the shortened protocol mode (a signal indicating the transmission speed of the high-speed NSS is started in step 274). ) Is received, the mode is changed to the shortened protocol mode (reception-time transfer case 1), and step 27
6, reception phase B (FIG. 8), step 278, reception phase C (FIG. 9), and step 280, reception phase D
(FIG. 10) is executed. When it is determined in step 282 that the phase is to shift to the reception phase C, the process returns to step 278 to execute the reception phase C, and when it is determined in step 284 that the mode is to shift to the reception phase B, the process returns to step 276 and executes the reception phase B. To do. And reception phase B,
After performing C, D, and E, in step 286, low speed DCN
(Disconnect command signal) is received and the reception is ended.

When it is determined in step 274 that the signal instructing the shift to the shortened protocol mode has not been received, it is determined in step 288 whether CNG has been received. If no CNG is received, step 29
Steps 274 and 2 until 0 is determined to be a timeout
The judgment of 88 is repeated.

When CNG is received and when a time-out occurs, CED is sent in step 292,
In step 294, it is determined whether a signal instructing the shift to the shortened protocol mode has been received. When a signal is received that indicates the transition to the shortened protocol mode,
After the CED transmission is stopped in step 296, the mode is shifted to the shortened protocol mode (reception case 2), and the process proceeds to step 276.
It is determined whether the transmission is completed. If the CED transmission has not ended, the process returns to step 292 to continue the CED transmission, and C
When ED transmission is completed, NSF / DIS in step 00
After sending the message, it is determined in step 302 whether a signal instructing the shift to the shortened protocol mode has been received. When the signal instructing the shift to the shortened protocol mode is received, the mode is shifted to the shortened protocol mode (transition case 3 at the time of reception) and the process proceeds to step 276, and the signal instructing the shift to the shortened protocol mode is not received. In this case, in step 304, the normal reception mode is entered.

FIG. 11 shows a signal sequence in the cases (1) to (3) of shifting to the shortened protocol mode during transmission and reception.
~ Shown in FIG. 11 to 13, the RCP frame (PPS / MPS) indicates that the post message command PPS / MPS is set in the RCP frame, and the RCP frame (PPS / EOP) indicates the post message command PPS in the RCP frame. -Indicates that EOP is set, and FCD frame (PIX) is FCD
Indicates that the image information PIX is set in the frame.
ITU-T Recommendation V. 27 ter, V.I. 29 (opti
on), V. 17 shows an unmodulated carrier defined in 17 etc., and performs common operation after shifting to the shortened protocol mode.

The reception phase B will be described with reference to FIG. When it is determined in step 310 that the high speed NSS command of the transmission speed indicated by the signal received from the transmitter is received, the high speed NSF is transmitted in step 312, and the process proceeds to the image information reception phase C.

When the high speed NSS is not received, it is judged in step 314 whether or not the high speed NSC is received. When it is not received, the process returns to step 310, and when it is received, it is judged in step 316 whether it is polled OK or not. If the determination is negative, error termination processing is performed in step 320, and if the determination is positive, the transmission phase B of FIG. 4 is executed in step 318.

The reception phase C will be described with reference to FIG. In the reception phase C, the image information sent by being divided into frames by ECM is received. As described in the case of transmission, the frame configuration is such that the first frame (frame No. 0) is set with a parameter indicating the image information transmitted subsequently, and the image information is transmitted after the second frame. It is set.

In step 322, it is judged whether or not an FCD (facsimile coded data) frame is received. If not received, that is, the post message command P. M. When the RCP frame in which the content corresponding to C is set is received, the P.P. M. The contents of C are analyzed, and the process proceeds to phase D for sending a response command.

When the FCD frame is received, the frame No. It is determined whether or not 0 (first frame) has been received, that is, whether or not NSS information has been received. If received, the NSS information is analyzed in step 328, and the frame number. 0 is not received, that is, the frame number. When 1 or later (second frame and later) is received, the received image information is stored in the RAM 2,
In step 332, it is determined whether or not the frame reception is completed.
When the frame reception is completed, the process shifts to phase D, and when the frame reception is not completed, the above procedure is repeated.

Next, the reception phase D will be described with reference to FIG.
Will be explained. In step 500, it is determined whether or not the RCP frame is received. If the RCP frame is not received, the process waits until it is determined in step 502 that the low speed command is received. When the low speed command is received, the process proceeds to step 504. move on. On the other hand, if the RCP frame is received, the reception state of the FCD frame is confirmed in step 504, and if it is good, the process waits until the post message command is received in step 506, and if it is received, the line hold is determined in step 508. If it is line hold, the line hold procedure is executed in step 510, and if it is not line hold, step 512 is executed.
At step 514, it is determined whether or not there is a next page. If there is no next page, step 51
In step 6, the process proceeds to phase E, and if there is a next page, it is determined in step 518 whether the mode is changed. If the mode is not changed, the process proceeds to phase C in step 520. When the mode is changed, it is determined in step 522 whether NSC has been received. If NSC has not been received, the process moves to phase B in step 524. When NSC is received, it is determined in step 526 whether transmission is possible. If the transmission is impossible, the processing ends in error at step 530, and if the transmission is possible, the transmission phase B (FIG. 4) is executed at step 528. In this way, the transmission / reception exchange can be performed by the shortened protocol.

If it is determined in step 504 that the FCD frame reception condition is not good, the process waits until the post message command is received in step 532, and when it is received, the low speed PPR is transmitted in step 534, and the CTC is transmitted in step 536. Is received. CT
When C is received, low-speed CTR is transmitted in step 538, and then the process proceeds to phase C in step 540.

If the CTC is not received, it is judged in the step 542 whether or not the EOR is received. If it is not received, the phase shifts to the phase C in the step 552, and if it is received, the line hold is held in the step 544. If it is the line hold, the line hold procedure is executed in step 546, and if it is not the line hold, the low speed ERR is transmitted in step 548, and then the process proceeds to phase E in step 550.

FIG. 14 shows the signal sequence of the transmission / reception change procedure of the reception phase D. If the parameter indicating the receiving capability of the calling station is set in the NSC in FIG. 14, the procedure for receiving the NSF as shown in FIG. 15 can be omitted.

If a parameter indicating the receiving capability of the calling station is set in NSF, the parameter need not be added to NSC.

The high speed NSC, high speed NSS and high speed NSF are 9600 bps to 2400 bps,
Low speed (300 bps) NSC, NSS and NSF may be used.

Further, according to the present invention, excellent effects can be obtained by limiting the following points.

3. The facsimile communication method according to claim 1, wherein the transmission / reception change signal, the command signal and the identification signal are transmitted at high speed. 7. The facsimile apparatus according to claim 3, wherein the transmission / reception change signal, the command signal, and the identification signal are transmitted at high speed. According to such a facsimile communication method or facsimile device, since the transmission / reception change signal, the command signal and the identification signal are transmitted at high speed, the communication time can be shortened.

The facsimile communication method according to any one of claims 1 and 2, wherein a parameter indicating a receiving capability is added to the transmission / reception exchange signal, and transmission / reception of the identification signal is omitted. The facsimile apparatus according to any one of claims 1 to 2, wherein a parameter indicating a receiving capability is added to the transmission / reception exchange signal, and transmission / reception of the identification signal is omitted. According to such a facsimile communication method or facsimile device, transmission / reception of the identification signal is omitted, so that the communication time can be shortened.

A facsimile communication method according to any one of claims 1 and 2, wherein a signal obtained by omitting a parameter indicating a receiving capability is used as the transmission / reception exchange signal. 3. The facsimile apparatus according to claim 1, wherein a signal obtained by omitting a parameter indicating a receiving capability is used as the transmission / reception exchange signal. According to such a facsimile communication method or facsimile apparatus, the parameter indicating the receiving capability is omitted from the transmission / reception change signal, so that the communication time can be shortened.

[0084]

As described above, according to the inventions of claim 1, claim 3 and claim 4, since the command signal in which the parameter desired to be transmitted by the called station is set, the called station issues the call. The effect that the call station does not need to send both the non-standard function command signal and the standard digital identification signal assuming both the own machine and another company's machine, and the communication time at the time of polling can be shortened. Can be obtained.

Then, claim 2, claim 5 and claim 6
According to the invention, the receiving station receives the transmission / reception change signal from the transmitting station, and then transmits the command signal in which the parameter desired to be transmitted by the receiving station is transmitted. Assuming both, it is not necessary to transmit both the non-standard function command signal and the standard digital identification signal,
It is possible to obtain the effect that the communication time at the time of transmission / reception replacement can be shortened.

[Brief description of drawings]

FIG. 1 is a block diagram showing a facsimile apparatus according to an embodiment of the present invention.

FIG. 2 is a flow chart showing a control routine of a transmission protocol.

FIG. 3 is a flowchart showing a control routine of transmission phase A.

FIG. 4 is a flowchart showing a control routine of a transmission phase B.

5 is a flowchart showing a control routine of transmission phase C. FIG.

FIG. 6 is a flowchart showing a control routine of a transmission phase D.

FIG. 7 is a flow chart showing a control routine of a reception protocol.

FIG. 8 is a flowchart showing a control routine of transmission phase B.

FIG. 9 is a flowchart showing a control routine of reception phase C.

FIG. 10 is a flowchart showing a control routine of reception phase D.

FIG. 11 is a diagram showing a signal sequence of a shortened protocol procedure in a shortened protocol mode transition case 1 during transmission and reception.

FIG. 12 is a diagram showing a signal sequence of a shortened protocol procedure of a shortened protocol mode transition case 2 during transmission / reception.

FIG. 13 is a diagram showing a signal sequence of a shortened protocol procedure in a shortened protocol mode transition case 3 during transmission / reception.

FIG. 14 is a flow chart showing a signal sequence of a transmission / reception exchange procedure.

FIG. 15 is a flow chart showing a signal sequence of a transmission / reception changing procedure in which transmission of an identification signal is omitted.

16A is a diagram showing the concept of image information divided into frames in ECM, FIG. 16B is a diagram showing a normal RCP frame, and FIG. 16C is a diagram showing a post message command in an RCP frame. It is the figure which showed inserting.

[Explanation of symbols]

 1 CPU 2 RAM 8 System controller

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshiaki Tezuka, 3-7-1, Fuchu, Iwatsuki City, Saitama Prefecture Fuji Zerox Co., Ltd. Iwatsuki Office (72) Inventor, Takashi Sakayama 3-7-1, Fuchu, Iwatsuki City, Saitama Prefecture No. Fuji Xerox Co., Ltd. Iwatsuki Plant (72) Inventor Hirotaka Kawabata 3-7-1 Fuchu, Iwatsuki City, Saitama Prefecture Fuji Xerox Co., Ltd. Iwatsuki Plant

Claims (6)

[Claims] 1. A facsimile communication method in which a calling station polls to receive image information from a called station, and the calling procedure is performed after shifting to a shortened protocol in which a communication procedure time is shortened from a standard protocol. The call station sends a transmission / reception change signal instructing transmission / reception change, the called station receives the transmission / reception change signal from the calling station, and the called station transmits a command signal in which the parameters to be transmitted are set. The calling station receives the command signal from the called station, and transmits an identification signal in which the parameters of the receiving station's receiving capability are set to the called station, and based on the desired parameter and the parameter of the receiving capability. Facsimile communication method in which the communication parameters are determined by using the communication parameters and the image information is received using the determined communication parameters. 2. A facsimile communication method in which a transmitting station that has transmitted image information receives image information from the receiving station after transmitting the image information, and a post message indicating the end of transmission of image information from the transmitting station. Send the signal, the receiving station receives the post message signal from the transmitting station,
A confirmation signal indicating that the post message signal has been received is transmitted, the transmission station receives the confirmation signal from the reception station, and a transmission / reception change signal is sent to instruct transmission / reception change. , The command signal with the parameters that the receiving station wants to send is sent, the sending station receives the command signal from the receiving station, and the identification signal with the receiving capability parameter of the sending station is sent. A facsimile communication method, which transmits to a receiving station, determines a communication parameter based on the parameter to be transmitted and a parameter of the reception capability, and receives image information with the determined communication parameter. 3. A facsimile device that receives image information from a partner device by polling, and sends a transmission / reception change signal instructing a change of transmission / reception using a shortened protocol in which the communication procedure time is shorter than the standard protocol. Transmission / reception exchange signal transmitting means, command signal receiving means for receiving a command signal from the partner machine in which the parameter to be transmitted is set by the shortened protocol, and an identification signal in which the parameter of the receiving capability is set is transmitted by the shortened protocol. A facsimile apparatus comprising: an identification signal transmitting unit; and a communication parameter determining unit that determines a communication parameter based on the parameter to be transmitted and the reception capability parameter. 4. A facsimile device which is poled and transmits image information to a partner device, wherein a transmission / reception signal for instructing a transfer / receipt from the partner device is shortened by shortening a communication procedure time from a standard protocol. The transmission / reception exchange signal receiving means, the command signal transmitting means for transmitting the command signal in which the parameter to be transmitted is set by the shortening protocol, and the identification signal in which the receiving ability parameter from the partner device is set in the shortening protocol. A facsimile apparatus comprising: an identification signal receiving unit for receiving; and a communication parameter determining unit for determining a communication parameter based on the parameter to be transmitted and the parameter of the receiving capability. 5. A facsimile device for receiving image information from a partner machine after transmitting the image information, and a post message transmitting means for transmitting a post message signal indicating the end of the transmission of the image information, and a partner machine. The confirmation signal receiving means for receiving the confirmation signal indicating the confirmation of the reception of the post message signal from the device and the transmission / reception exchange signal for instructing the exchange of transmission / reception are transmitted by the shortened protocol in which the communication procedure time is shortened from the standard protocol. A transmission / reception exchange signal transmitting means, a command signal receiving means for receiving a command signal from the partner device in which the parameter to be transmitted is set by the shortened protocol, and an identification signal in which the parameter of the receiving ability is set are transmitted by the shortened protocol. Identification signal transmitting means, communication parameters based on the parameter to be transmitted and the parameter of the receiving ability A facsimile apparatus including: communication parameter determining means for determining. 6. A facsimile device for transmitting image information to a partner machine after receiving the image information, comprising post message receiving means for receiving a post message signal indicating the end of the transmission of the image information from the partner machine. , The confirmation signal transmitting means for transmitting the confirmation signal indicating that the reception of the post message signal has been confirmed, and the transmission / reception exchange signal for instructing the exchange of transmission / reception from the partner machine have been shortened in the communication procedure time compared to the standard protocol. A transmission / reception exchange signal receiving means for receiving by a protocol, an instruction signal transmitting means for transmitting a command signal with a parameter to be transmitted according to the shortening protocol, and an identification signal with a parameter of the receiving capability from the partner device as the shortening protocol. Based on the parameter to be transmitted and the parameter of the receiving capability, A facsimile apparatus including: communication parameter determining means for determining a parameter.