JPH10107986A - Communication terminal equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly execute error processing by allowing a relay instruction station in relay multiple address communication to execute an optimum error processing depending on a processing capability of a relay station. SOLUTION: In the case of detecting an error, a communication error detection section 42 gives a prescribed signal in response to a type of errors to a CPU 12, and the CPU 12 detects production an error that is not recovered regardless of re-dialing based on the signal. Furthermore, a program stored in a ROM 28 to control relay multiple address communication processing includes all programs for the operation as a relay instruction station, a relay station and a destination station. When an error is produced, a CPU 12 of a terminal equipment A executes a control routine through the execution instruction of relay multiple address communication by an operation display device 18 of the instruction station side and the processing capability of the relay station is discriminated. When the discrimination is possible, the optimum error processing method in response to the processing capability of the relay station is set and stored in a RAM 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a communication terminal, and more particularly, to transmitting data to a communication terminal as a relay station and relaying the data to a communication terminal as a destination station. And a communication terminal device as a relay instruction station for instructing the relay station.

[0002]

2. Description of the Related Art Conventionally, a communication system called a relay broadcast has been used in a facsimile communication network or the like. This relay broadcast is performed by a facsimile apparatus (hereinafter, referred to as a relay instruction station) as a relay instruction station and a plurality of facsimile apparatuses (hereinafter, referred to as relay stations) as destination stations. , Referred to as a destination station) to broadcast data, and the relay station receiving this instruction broadcasts the data to a plurality of destination stations.

[0003] In such a relay broadcast, if an unrecoverable communication error such as a line disconnection occurs while data is being transmitted from the relay instruction station to the relay station,
Conventionally, there is no rule regarding the error processing method between the relay instruction station and the relay station, so that the relay instruction station and the relay station perform error processing according to a preset error processing method.

[0004] For this reason, an error occurs in the error processing method between the relay instruction station and the relay station, and there is a possibility that data is not transmitted to the destination station that is the final transmission destination as intended by the relay instruction station.

For example, the relay instruction station has an error processing method of re-calling the relay station and retransmitting data from the beginning.
In one relay station, an error processing method of broadcasting data normally received before a communication error occurs to a destination station,
It is assumed that each is set. Here, if a communication error occurs in the middle of the third page during transmission of the five pages of image data from the relay instruction station to the relay station, the relay station sets up to the second page before the occurrence of the communication error as the destination station. Broadcast, and the image data from the beginning (from the first page) retransmitted from the relay instruction station are also broadcast to the destination station. As a result, the destination station receives up to the second page redundantly, which means that useless communication has occurred.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problem. In a relay broadcast, an error processing method is matched between a relay instruction station and a relay station, and error processing is performed. It is an object of the present invention to provide a communication terminal device that can execute smoothly.

[0007]

In order to achieve the above object, a communication terminal according to claim 1 transmits data to a communication terminal as a relay station and transmits the data to a communication terminal as a destination station. A communication terminal device as a relay instruction station for instructing the relay station to relay and broadcast data, wherein an error that cannot be recovered in the communication connection state when transmitting data to the relay station. And error processing execution means for executing an optimum error processing according to the processing capacity of the relay station when an unrecoverable error is detected.

Further, in the communication terminal device according to the present invention,
2. The communication terminal device according to claim 1, wherein when the processing capacity of the relay station is predetermined, the error processing execution unit executes an optimum error processing according to the predetermined processing capacity. Features.

Further, in the communication terminal device according to the third aspect,
2. The communication terminal device according to claim 1, wherein the error processing execution unit determines a processing capability of the relay station when a processing capability of the relay station is not predetermined, and a determination result by the determination unit. And a determination execution means for executing an optimal error process based on the determination.

Further, in the communication terminal device according to the fourth aspect,
4. The communication terminal device according to claim 3, wherein, when the processing capability of the relay station cannot be determined, the determination-time executing means can handle any error in the processing capability of the relay station. It is characterized in that optimal error processing is executed in the processing.

[0011] In the communication terminal device according to the fifth aspect,
5. The communication terminal device according to claim 1, wherein the error processing execution unit sets the optimal error processing method before starting data transmission to the relay station. 6. When the error is detected, error processing is performed according to the set error processing method.

According to a sixth aspect of the present invention, in the communication terminal of the fifth aspect, the communication terminal further comprises a processing capability setting means for setting its own processing capability in accordance with the set error processing method. It is characterized by.

In the communication terminal device according to the first aspect, when data is transmitted to the communication terminal device as a relay station as a relay instruction station, an error that cannot be recovered in the communication connection state by the error detection means. Is detected, the error processing execution means executes an optimum error processing according to the processing capacity of the relay station.

Here, the optimum error processing is an error processing that can reliably transmit all data to the relay station without losing all data under the condition of the processing capacity of the relay station and can reduce unnecessary communication. Means The optimal error processing used below has the same meaning.

For example, if the relay station does not have the ability to relay only the normally received data to the destination station and only has the ability to discard all the received data immediately after an error occurs, From the beginning to the relay station. If the relay station has the ability to hold only the data received normally and relay it to the destination station together with the received data, the data is retransmitted to the relay station from the page where the error occurred. Perform error handling.

As described above, in the communication terminal device as the relay instruction station according to the first aspect, an optimum error processing is executed in accordance with the processing capability of the relay station, instead of executing the original error processing as in the related art. I do. Thereby, the error handling method can be matched between the relay instruction station and the relay station, and error processing can be performed smoothly.

By the way, regarding the processing capability of the relay station,
There are cases where it is predetermined and cases where it is not predetermined. When the processing capacity of the relay station is predetermined, the error processing execution means may execute the optimum error processing according to the predetermined processing capacity.

On the other hand, if the processing capacity of the relay station is not determined in advance, the error processing executing means is constituted by including the judging means and the judging time executing means. The means may determine the processing capability of the relay station, and the determination execution means may execute the optimum error processing based on the determination result.

However, if the processing capability of the relay station cannot be determined by the determining means, the processing at the time of determination can be performed by the determining execution means, regardless of the processing capability of the relay station. The optimal error processing may be executed from among the various error processing. Accordingly, even when the processing capacity of the relay station cannot be determined, error processing is executed from among error processing that can be handled with any processing capacity, so that smooth error processing can be maintained.

By the way, as in the invention according to claim 5,
By setting an optimal error processing method before starting data transmission to the relay station by the error processing execution means,
There is no need to set an error processing method after detecting an error, and error processing can be executed quickly.

Further, as in the invention according to claim 6, further comprising a processing capacity setting means, the processing capacity setting means can set its own processing capacity according to the set error processing method. desirable. For example, if the error processing method of retransmitting data from the page at the time of occurrence of the error to the relay station is set, it is not necessary to retransmit the page normally transmitted to the relay station. It is desirable to set the processing capacity to delete the page data from the memory and release the memory.

[0022]

Embodiments of the present invention will be described below.

FIG. 1 shows a communication terminal device 10 according to the present invention.
Is shown in FIG. The communication terminal device 10 includes a CPU 12 that controls the entire communication terminal device 10,
An RO in which a control program for controlling the entire apparatus, a program for controlling relay broadcast processing, and the like are stored in advance.
M28 and the RAM 14 as a working memory used by the above programs and the like are provided.

The communication terminal device 10 includes a non-volatile storage device 16 which is composed of a magnetic disk device or the like and is a storage device for data to be stored even after the power is turned off, and an operator instructs start / stop of various processes. An operation display device 18 including a keyboard for performing operations such as operations and a display for displaying information related to various processes;
A reading device 20 that reads a transmission original; and encoding, decoding, enlarging,
An image processing device 22 for performing processing such as reduction and an image storage device 24 as a memory dedicated to image data are provided. Note that the image data means information read from a transmission document, and the image data includes information such as images, characters, and symbols.

The communication terminal 10 includes a digital network controller 38 for connecting the communication terminal 10 to a digital network 39 and an analog network controller 40 for connecting the communication terminal 10 to an analog network 41. And are provided,
These digital network controller 38 and analog network controller 4
0 is a line switching controller 3 for controlling line switching.
6 is connected. Further, the communication terminal device 10 includes:
A communication control unit 30 for controlling communication suitable for a digital network such as G4 facsimile communication and a communication control unit 32 for controlling communication suitable for an analog network such as G3 facsimile communication are provided. Is directly connected to a line switching controller 36, and the communication controller 32 is connected to the line switching controller 36 via a modem 34.

Further, the communication terminal device 10 is provided with a communication error detecting section 42 for detecting an error during communication such as a line disconnection error based on signals from the digital network control device 38 and the analog network control device 40. I have. When detecting an error, the communication error detection unit 42 sends a predetermined signal corresponding to the type of the error to the CPU 12. CPU 12
Can detect, based on the signal from the communication error detection unit 42, the occurrence of an error that cannot be recovered even if the call is re-established (line disconnection, etc.).

It should be noted that, of the above devices, other devices except the modem 34 are mutually connected via the system bus 26.

The program for controlling the relay broadcast processing stored in the ROM 28 includes a program for operating as a relay instruction station, a program for operating as a relay station, and a program for operating as a destination station. Everything is included. For this reason, the communication terminal device 10 has all the functions of a relay instruction station, a relay station, and a destination station.

Next, the operation of the present embodiment will be described. Here, the outline of the relay broadcast will be described first with reference to FIG. As shown in FIG. 2, the relay broadcast means that a communication terminal apparatus 10A (hereinafter, referred to as a terminal A) called a relay instruction station is replaced by a communication terminal apparatus 10B (hereinafter, referred to as a terminal B) called a relay station.
To transmit data and broadcast the data to a plurality of communication terminal devices 10C, 10D, and 10E (hereinafter, referred to as terminals C, D, and E, respectively) called destination stations, This is a communication mode in which the terminal B broadcasts data to the terminals C, D, and E based on the instruction.

This communication mode is intended to reduce communication charges when broadcasting to a plurality of destinations. For example, when data is transmitted from the head office in Tokyo (relay instruction station) to multiple offices in the Osaka area, broadcasting from the head office to multiple offices will result in extra toll charges. The overall communication fee will be very high. Therefore, FIG.
As shown in (1), data is transmitted from the head office to one business office in Osaka, and the data is broadcast from the one business office to another business office in Osaka. As a result, the toll call fee is charged only once, and the other communications need only be the local call fee, so that the overall communication fee can be reduced.

In the following, a description will be given of a relay broadcast error process performed by the terminal A as the relay instruction station shown in FIG. In this embodiment, in order to make the description easy to understand, the processing capability of the terminal B, the error processing method by the terminal A, the error processing instruction from the terminal A to the terminal B, and the terminal A
Several patterns are assumed for each of the processing capacities. First, patterns for each of the above will be described.

The following six patterns are assumed as the processing capability of the terminal B. Processing capability 1: If an unrecoverable error is detected while receiving image data in a certain call, all image data received so far in the call is discarded.

Processing capability 2: When an unrecoverable error is detected while receiving image data in a call, the image data normally received in the call is relayed and broadcasted.

Processing capability 3: When an irrecoverable error is detected while receiving image data for a certain call, the normally received image data is stored for a certain specified time. Then, it waits for a relay broadcast instruction from the relay instruction station until the specified time, and if there is the same relay instruction during that time, relays the image data and the stored image data as one image data together. . On the other hand, if there is no same relay instruction, the stored image data is discarded.

Processing capability 4: If an unrecoverable error is detected while receiving image data for a certain call, the normally received image data is stored for a certain specified time. Then, it waits for a relay broadcast instruction from the relay instruction station until the specified time, and if there is the same relay instruction during that time, relays the image data and the stored image data as one image data together. . On the other hand, if there is no same relay instruction, the stored image data is relayed and broadcasted.

Processing capability 5: If an unrecoverable error is detected while receiving image data for a certain call, the normally received image data is stored for a certain specified time. Then, wait for an error processing instruction from the relay instruction station until the specified time,
When an error processing instruction is received, processing is performed according to the instruction. On the other hand, if there is no error processing instruction, the stored image data is discarded.

Processing capability 6: If an unrecoverable error is detected while receiving image data in a certain call, the normally received image data is stored for a certain specified time. Then, wait for an error processing instruction from the relay instruction station until the specified time,
When an error processing instruction is received, processing is performed according to the instruction. On the other hand, if there is no error processing instruction, the stored image data is relayed and broadcast.

Next, the following three patterns are assumed as the error handling method by the terminal A.

Error processing method 1: A recall is made to terminal B, the same relay broadcast instruction is performed, and the image data is retransmitted from the beginning.

Error processing method 2: A recall is made to terminal B, the same relay broadcast instruction is performed, and image data is retransmitted from the page where the error occurred.

Error processing method 3: An error processing instruction is issued to terminal B, a recall is made to terminal B, the same relay broadcast instruction is issued, and image data is retransmitted from the page where the error occurred.

Next, the following two patterns are assumed as an error processing instruction from the terminal A to the terminal B.

Error processing instruction 1: Instructs terminal B to relay the image data normally received before the error occurred in the previous communication together with the image data to be transmitted.

Error processing instruction 2: Image data received normally before an error occurs in the previous communication is relayed to terminal B first, and image data to be transmitted is relayed as another call. Tell them to report.

Finally, the following two patterns are assumed as the processing capability of the terminal A. Processing capability 7: While transmitting image data consisting of a plurality of pages, deletes the page whose transmission has been completed from the memory.

Processing capacity 8: When transmitting image data composed of a plurality of pages, after confirming that all the image data has been transmitted to the destination, the image data stored in the memory is deleted.

Next, with reference to FIG. 3, an explanation will be given on the error processing of the relay broadcast executed by the terminal A. When the operator at the terminal A issues an instruction to execute the broadcast using the keyboard of the operation display device 18, the CPU 12 of the terminal A starts the execution of the control routine shown in FIG. Step 1 of FIG.
In 02, an attempt is made to determine the processing capability of terminal B as a relay station.

Here, if the processing capability of the terminal B cannot be determined, the process proceeds to step 106, and an error processing method when the terminal B cannot be determined, that is, an error processing method that can handle any processing capability of the terminal B The error processing method 1 (image data is retransmitted from the beginning) is set as
To memorize.

On the other hand, if the processing capability of the terminal B can be determined, the process proceeds to step 108, where an optimum error processing method is set according to the processing capability of the terminal B as follows, and the RAM 1
4 is stored.

More specifically, when the processing capability of the terminal B is 1, the terminal B discards all the already received image data after detecting an unrecoverable error. Error processing method 1 (image data is retransmitted from the beginning) is set.

The processing capacity of the terminal B is processing capacity 2,
In the case of any one of 3 and 4, the terminal B has the ability to broadcast at least the image data normally received after detecting the unrecoverable error, so that the error processing method 2 ( (Resend image data from the page where the error occurred).

Further, the processing capability of the terminal B is determined to be
If the terminal B detects an unrecoverable error, the terminal B saves the normally received image data and waits for an error processing instruction.
(The image data is retransmitted from the page where the error occurred after the error processing instruction is issued) is set.

In the processing method 3, the error processing instructions 1, 2
Is set depending on whether or not the terminal B has the ability to create one image data by combining the previously received image data and the newly received image data.
That is, if the terminal B has the above capability, the error processing instruction 1 is set, and if the terminal B does not have the above capability, the error processing instruction 2 is set.

Step 106 or 10 as described above
After setting and storing the error handling method in step 8,
The process proceeds to 0, and it is determined whether to change the processing capability of the own terminal (terminal A) based on the error processing method set above and the current processing capability of the own terminal.

For example, when the error processing method 1 is set, the processing capability of the terminal A is desirably 8 (deletion of the image data unit), but if the processing capability is not currently set to 8, the processing capability is changed. I judge it. Also,
When the error processing method 2 or 3 is set, the processing capability of the terminal A is desirably the processing capability 7 (deletion on a page basis), but when the processing capability is not set to the current processing capability 7, it is determined that the processing capability is changed.

Only when it is determined in step 110 that the processing capacity of the own terminal is to be changed, the process proceeds to step 112 to change the processing capacity. For example, when the error processing method 1 is set and the processing capability is not currently set to 8, the processing capability of the terminal A is changed to the processing capability 8. If the error processing method 2 or 3 is set and the current processing capacity is not set to 7, the processing capacity of the terminal A is changed to the processing capacity 7.

Thereafter, the process proceeds to step 114, where information on the destination station and the like are transmitted to the terminal B as instruction information on the relay broadcast. In the next step 116, transmission of image data to the terminal B is started. As a result, the image data is transmitted from the terminal A to the terminal B page by page, and the image storage device 2 of the terminal B
4 is stored.

In the next step 118, it is determined whether or not the transmission of the image data to the terminal B has been completed. If the transmission has not been completed, the process proceeds to step 120, where it is determined whether the communication error detection unit 42 has detected an unrecoverable communication error such as a line disconnection. If a communication error has not been detected, the process returns to step 118.

On the other hand, if a communication error is detected in step 120, the flow advances to step 122 to read information on the error processing method from the RAM 14. And the next step 1
At 24, error processing is started according to the error processing method.

For example, when the error processing method 1 is set, the terminal B is re-called, the same relay broadcast instruction is performed, and the image data is retransmitted from the beginning. After discarding all the image data already received, the terminal B receives the retransmitted image data from the beginning, and transfers the image data from the beginning to the designated destination stations (terminals C, D, and E). Broadcast to.

When the error processing method 2 is set, the terminal B is re-called, the same relay broadcast instruction is performed, and the image data is retransmitted from the page where the error occurred. At this time, if the terminal B has the processing capability 2, the image data up to the normally received page is broadcast to a plurality of designated destination stations, and the image data after the error page is received. Broadcast the image data after the error page to a plurality of destination stations. On the other hand, when the terminal B has the processing capacity 3 or 4, after storing the image data up to the page normally received, the image data after the page where the error occurred is received, The image data that is normally received (image data before the page where the error occurred) is broadcast to a plurality of destination stations as one image data.

Further, when the error processing method 3 is set, first, an error processing instruction is issued to the terminal B, a re-call is made and the same relay broadcast instruction is issued, and the image data is changed to the page where the error occurred. To resend. When the error processing instruction 1 is given above, the terminal B stores the image data up to the normally received page, and then stores the image data after the retransmitted error page according to the error processing instruction 1. The image data (the image data before the page in which the error occurred) that has been normally received the previous time is combined and broadcast as a single image data to a plurality of destination stations. On the other hand, when the error processing instruction 2 is performed as described above, the terminal B saves the normally received image data, and then, in accordance with the error processing instruction 2, transmits the previously normally received image data (the data before the error occurrence page). The image data) is first broadcast to a plurality of destination stations, and the retransmitted image data after the error page is broadcast to the plurality of destination stations as another call.

When the error processing described above is completed (when a positive determination is made in step 126) or when the transmission of image data is completed before a communication error is detected (when a positive determination is made in step 118) , Step 12
Then, the process proceeds to step S8, where a termination process for terminating the communication with the terminal B is executed, and the control routine is terminated.

According to the embodiment described above, the optimum error processing is set and executed in accordance with the processing capacity of the terminal B as the relay station, so that the relay instruction station (terminal A) and the relay station (terminal B) Thus, the error processing method can be matched, and the error processing can be executed smoothly.

Even if the processing capability of the relay station (terminal B) cannot be determined, error processing is set in step 106 in FIG. 3 so that the processing capability can be any processing capability. , Smooth error handling can be maintained.

Further, before starting transmission of image data to terminal B in step 116 of FIG. 3, an error processing method is set in advance, so that error processing can be executed promptly after a communication error is detected. it can. Further, the processing capability of the relay instruction station (terminal A) is changed as necessary according to the set error processing method, so that error processing can be performed more smoothly.

In the above embodiment, the processing in the case where the processing capability of the terminal B serving as a relay station is not predetermined has been described. However, the processing capability of the terminal B is predetermined and is stored in the terminal A. 4, the processing capability of the terminal B is first read from the non-volatile storage device 16 or the like in step 103, and the read processing capability of the terminal B is read in the next step 108A. An optimal error processing method may be set in accordance with this. In the flowchart of FIG. 4, "A" is added to the end of the step number for the same processing as in FIG.

[0068]

According to the first aspect of the present invention, since the optimum error processing is executed according to the processing capacity of the relay station, the error processing method is matched between the relay instruction station and the relay station, and the error processing is performed. The effect that smooth execution can be obtained is obtained.

According to the fourth aspect of the present invention, even when the processing capability of the relay station cannot be determined, error processing is executed from error processing that can be handled by any processing capability, so that smooth processing is performed. The effect is obtained that error processing can be maintained.

According to the fifth aspect of the invention, there is no need to set an error processing method after detecting an error, so that error processing can be executed quickly.
The effect is obtained.

According to the sixth aspect of the present invention, the error processing can be performed more smoothly by setting its own processing capability according to the set error processing method. can get.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a schematic configuration of a communication terminal device according to an embodiment.

FIG. 2 is a diagram for explaining relay broadcasting.

FIG. 3 is a flowchart showing a control routine executed by a terminal A;

FIG. 4 is a flowchart showing a control routine when the processing capability of terminal B is predetermined.

[Explanation of symbols]

 Reference Signs List 10 communication terminal device 12 CPU 24 image storage device 42 communication error detection unit

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04M 11/00 303 H04L 11/18 H04N 1/00 104 13/00 311

Claims (6)

[Claims] 1. A communication terminal as a relay instruction station for transmitting data to a communication terminal device as a relay station and instructing the relay station to relay and broadcast the data to a communication terminal device as a destination station. An error detecting means for detecting an unrecoverable error in the communication connection state while transmitting data to the relay station; and A communication terminal device comprising: an error processing execution unit configured to execute an optimum error processing according to a processing capability of a station. 2. The method according to claim 1, wherein when the processing capacity of the relay station is predetermined, the error processing execution means executes an optimum error processing according to the predetermined processing capacity. Item 2. The communication terminal device according to item 1. 3. The error processing execution means, when the processing capacity of the relay station is not determined in advance, determining means for determining the processing capacity of the relay station; 2. The communication terminal device according to claim 1, further comprising: a determination execution unit that executes an error process. 4. When the processing capability of the relay station cannot be determined, the determination-time executing means is an optimal error processing unit that can handle any processing capability of the relay station. The communication terminal device according to claim 3, wherein the communication terminal device performs an error processing. 5. The error processing execution means sets the optimal error processing method before starting data transmission to the relay station, and according to the set error processing method when the error is detected. The communication terminal device according to any one of claims 1 to 4, wherein the communication terminal device performs error processing. 6. According to the set error processing method,
6. The communication terminal device according to claim 5, further comprising a processing capability setting means for setting its own processing capability.