JP2846649B2 - Communication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Overview] In broadcast communication, an IS is transmitted via a broadcast data reception channel.
Regarding the broadcast method in ISDN that receives the broadcast destination terminal number from the DN and performs broadcast processing to those terminals via ISDN, the simultaneous broadcast to other terminals by utilizing the ISDN channel for broadcast Broadcasting via a receiving ISDN data channel via ISDN, with the aim of greatly reducing the broadcasting time by transmitting broadcast information
Prior to receiving the ISDN terminal number, when receiving the recognition of the broadcast through the receiving ISDN data channel, the receiving ISDN terminal device receives the broadcast ISDN terminal number received through the receiving ISDN data channel. A call to an ISDN terminal device corresponding to one of the broadcast destination ISDN terminal numbers via the ISDN control channel of the ISDN channels, and
ISDN data channel receiving ISDN terminal device and one broadcast destination
An ISDN terminal device corresponding to an ISDN terminal number
Each of the received broadcast ISDN terminal numbers and the received data are configured to be transmitted via a DN data channel.

[Industrial applications]

The present invention relates to a broadcast communication system in ISDN which receives a broadcast leading end number from an ISDN via a broadcast reception data channel at the time of broadcast and performs a broadcast process to those terminals via the ISDN.

In recent years, as one of communication services in the ISDN (Digital Integrated Service Network) where services have started, there is facsimile broadcasting. In this type of broadcast communication, it is required that the time required for the broadcast communication be short as in the case of other broadcast communication having a large amount of transmission data.

[Conventional technology]

One conventional facsimile broadcast communication system is such that a broadcast device 50 is installed in a facsimile terminal device which wants to perform broadcast communication as shown in FIG. 5, and the number of broadcast destination facsimile devices is set in the broadcast device 50. the same number of lines 52 ₁ and, ..., ₁ switch 54 52 _n, ..., 54 pull from _n, broadcast broadcast device 50 each multicast destination facsimile apparatus 56 ₁ from the time when you want to communicate, ...
·, 56 _n that each distribution destination facsimile apparatus of the same document data to form a simultaneous call to communication path 56 _1, ..., and transmitted through the communication channel to 56 _n. Another facsimile broadcast communication system is provided between the broadcast source facsimile device 60 and the exchange 62 as shown in FIG. 6 in order to avoid the low line utilization efficiency of the conventional one facsimile broadcast communication system. And a single facsimile machine via the line 64
Each broadcast destination facsimile machine 66 _{1 to} broadcast from 60
..., 66 successively without to the exchange 62 a call for _n their distribution destination facsimile apparatus 66 _1, ..., the same document data via the communication path formed between the 66 _n The transmission is performed sequentially.

[Problems to be solved by the invention]

In the latter method, since the broadcast is a sequential method, it takes several times the time required to transmit the same original data to one facsimile machine until the broadcast is completed. If there is no line, there is also a problem that another transmission must be waited for until the completion of the broadcast.

The present invention has been created in view of such problems,
An object of the present invention is to provide a broadcast method in ISDN that can achieve a significant reduction in broadcast time by simultaneously transmitting broadcast information to other terminals by utilizing an ISDN channel for broadcast communication. And

Means for Solving the Problems The present invention has been made to solve the above problems, and has a line control unit for transmitting and receiving an image signal using two lines, and a line control unit for connecting to a first line. Calling control means for acquiring destination information of the data from the transmission source after receiving the call and before receiving the data, and calling the destination using the second line while receiving the data on the first line; Transmitting means for transmitting the received data to the transfer destination after the call establishment of the second line,
It is characterized in that a part of the processing relating to data reception and a part of the processing relating to data transmission are operated in parallel.

(Operation)

When the present application is applied to, for example, an ISDN terminal device having two channels, the following is obtained.

When broadcasting the same data to multiple ISDN terminal devices, the source or forwarding ISDN terminal device and the next
An ISDN channel is established between the broadcast destination ISDN terminal device serving as the ISDN terminal device according to a normal control procedure. Receiving information that the communication of the ISDN channel formed via the receiving ISDN data channel among the ISDN channels is a broadcast;
When the receiving ISDN terminal device confirms this, it activates the ISDN calling means provided in its own device.

Then, an ISDN terminal corresponding to one of the required number of broadcasted ISDN terminal numbers received via the received ISDN data channel or the broadcasted ISDN terminal number including the received ISDN terminal device. A call is made to the device via an ISDN control channel, and an ISDN data channel other than the received ISDN data channel is set up between the receiving ISDN terminal device and the ISDN terminal device corresponding to the one broadcast destination ISDN terminal number. . This ISDN
The received broadcast destination ISDN terminal number and the received data are transmitted to an ISDN terminal device corresponding to the one broadcast destination ISDN terminal number via a data channel.

Since the reception of the same data and the transmission of the same data which are sequentially relayed are performed in parallel with a slight time delay, the time required for the broadcast can be greatly reduced.

〔Example〕

FIG. 1 shows a communication network for one embodiment of the present invention. FIG. 2 shows a configuration of a facsimile apparatus which is one of the ISDN terminal apparatuses shown in FIG. In FIG. 1, reference numerals 20A, 20B and 20C denote facsimile machines, and 22 denotes an ISDN. In FIG. 2, 24 is a telephone line connected to ISDN, and 26 is a line interface unit (S point interface unit). Each channel in the 2B + D ISDN channel formed on the telephone line 24 in response to the call is transmitted to each channel (B1 channel, B2 channel and D channel) in the line interface unit 26.
And is connected to the bus 28. A control unit 30, a scanner 32, a printer 34, a data compression / decompression circuit (DC / DE) 36, and a memory 38 are connected to the bus 28. And
As will be described later, in the memory 38 of the facsimile apparatus which is the ISDN terminal apparatus receiving the broadcast service, in addition to the programs for the call control and the data transmission / reception control with the ISDN 22, the programs are shown in FIG. 3 and FIG. A program for performing processing is stored.

The operation of broadcast communication in this facsimile communication network will be described below.

Now, the facsimile machine 20A is replaced with the facsimile machine 20B and
A broadcast of the same manuscript shall be sent to 20C.

The facsimile machine 20A makes a call to the facsimile machine 20B and transfers the call setting data to the ISDN 22 (FIG. 3 at 20).
0). The call setup data is sent from facsimile machine 2
At the same time as the transfer to 0B (202 in FIG. 3), the ISDN 22 returns call setting acceptance data to the facsimile machine 20A (204 in FIG. 3). Then, facsimile machine 20B to ISDN22
The response data transferred to the facsimile apparatus 20A is sent from the ISDN 22 to the facsimile apparatus 20A (206, 208 in FIG. 3). Response confirmation data is returned from the ISDN 22 to the facsimile machine 20B (210 in FIG. 3).

Thus, the facsimile machine 20A and the facsimile machine 2
0B, the ISDN calling procedure and the ISDN incoming procedure (S in FIG. 4)
When 1) is exchanged and a data transfer path of a B channel (for example, B1 channel) is formed between the two facsimile apparatuses, each layer connection establishment procedure (known procedure), that is, a link layer connection establishment procedure (fourth step) S3),
Network layer connection establishment procedure (S in FIG. 4)
4), transport layer connection establishment procedure (S5 in FIG. 4), session layer connection establishment procedure (S6 in FIG. 4), document layer connection establishment procedure (S7 in FIG. 4), and presentation layer connection establishment procedure (S5 in FIG. 4). The manuscript data (presentation text unit) is controlled sequentially in S8) of FIG.
Is transferred from the facsimile apparatus A to the facsimile apparatus B (S10 in FIG. 4). The data is compressed by the data compression / decompression circuit 36 of the facsimile machine 20A.

In the session layer connection establishment procedure of each layer connection establishment procedure prior to the original data reception (image data reception), when it is recognized that the image data to be received is broadcast data, Activate its own ISDN calling procedure (S101 in FIG. 4). Also, after the document layer connection establishment procedure (S7 in FIG. 4) is completed, the broadcast destination number (facsimile apparatus C) (document user information) received from the facsimile apparatus 20A via the B1 channel (S9 in FIG. 4) Is given to its own ISDN calling procedure (S101 in FIG. 5). This ISDN calling procedure is the same as described above, which is illustrated in FIG.
0,304,308. The ISDN call procedure (corresponding to S1 in FIG. 4) in the facsimile machine 20C for this ISDN call procedure is denoted by reference numerals 302, 306, and 310 in FIG. A data transfer path for the B2 channel is formed between the facsimile apparatus 20B and the facsimile apparatus 20C by an ISDN calling procedure and an ISDN incoming procedure which are sequentially exchanged via the ISDN 22 (fourth apparatus). S102 in the figure). This B2
Via a channel between the two facsimile machines (20B and 20C
), The same layer connection establishment procedure as described above is sequentially exchanged (S103 to S108 in FIG. 3), the reception of image data from the facsimile device 20A and the transmission of image data to the facsimile device 20C. Are sequentially performed in parallel with a slight time delay (S110 in FIG. 4). This transmission is performed as follows. In the facsimile device 20B, the received image data from the facsimile device 20A is once decompressed by the data compression / decompression circuit 36B of the facsimile device 20B.
Stored in the memory 38B. When transmitting the image data to the facsimile apparatus 20C in parallel with the storage of the image data in the memory 38B, the image data read from the memory 38B is compressed by the data compression / expansion circuit 36B, Facsimile machine through B2 channel
Sent to 20C. As for the image data to be transmitted to the facsimile apparatus 20C, the received image data may be temporarily stored in the memory 38B without the above-described decompression / compression processing, and may be used directly for transmission.

When the transmission and reception of the image data as described above is completed, first,
Each layer connection release procedure described above (procedure in the reverse order of each layer connection establishment procedure described above) (known procedure) (third
240 and 340 in FIG. 4 and S20 and S120 in FIG. 4 are followed by B channel release (S30 and S130 in FIG. 4 (240 and 340 in FIG. 3).
include. )) Is finally the ISDN call release procedure (Fig. 3
250 to 260, 350 to 360, and S40 and S140 in FIG. 4) between the facsimile machine 20A and the facsimile machine 20B and between the facsimile machine 20B and the facsimile machine 20C via the ISDN 22 slightly in time. The broadcast that is sequentially exchanged with a shift and started as described above ends.

In the above embodiment, the broadcast to two facsimile machines has been described. However, it is obvious to those skilled in the art that the present invention can be applied to the broadcast to three or more facsimile machines. Similarly, the applicability of the present invention to a communication network formed by connecting a facsimile apparatus or the like to an ISDN channel having another channel configuration is not lost. Further, the expansion of the received image data may be performed after the end of the broadcast communication.

[Effects of the Invention] As is clear from the above description, the present invention provides a line control means for transmitting and receiving an image signal using two lines,
After receiving an incoming call to the first line and before receiving the data, acquire the transfer destination information of the data from the transmission source, and make a call to the transfer destination using the second line while receiving the data on the first line. Control means, and transmission means for transmitting the received data to the transfer destination after the call establishment of the second line, wherein a part of the processing related to data reception and a part of the processing related to data transmission are operated in parallel. Therefore, the data transfer efficiency is significantly improved, and the time required for data transfer can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a communication network for an embodiment of the present invention, FIG. 2 is a diagram showing a configuration of a facsimile machine, FIG. 3 is a diagram showing a communication sequence, and FIG. 4 is a processing flow of the present invention. FIG. 5 and FIG. 6 are diagrams showing a conventional broadcast communication system. 1 to 3, 20A, 20B, and 20C are facsimile machines, 22 is an ISDN, 24 is a telephone line, 26 is a line interface unit, 28 is a bus, 30 is a control unit, 32 is a scanner, 34 is a printer, 36 is a data compression / decompression circuit, and 38 is a memory.

Claims (1)

(57) [Claims] 1. A line control means for transmitting and receiving an image signal using two lines, and after receiving an incoming call to a first line and before receiving data, obtains information on a transfer destination of the data from a transmission source.
Call control means for calling the transfer destination using the second line during data reception on the line, and transmission means for transmitting the received data to the transfer destination after the call is established on the second line. And a part of a process relating to data reception and a part of a process relating to data transmission are operated in parallel.