JP3248461B2 - Multi-line bulk transmission system and equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-line bulk transmission system and a multi-line bulk transmission apparatus for performing data transmission of one terminal device using a plurality of ISDN lines.

[0002]

2. Description of the Related Art A multi-line bulk transmission system (hereinafter referred to as a bulk transmission system) is a system for transmitting data of a terminal device using a plurality of ISDN lines. FIG. 1 shows a block diagram of the bulk transmission system. A pair of terminal devices 1-1 and 1-2 for performing data transmission are respectively connected to the bulk transmission device 2
-1 and 2-2 are connected to the ISDN network 3.
Here, taking the bulk transmission device 2-2 as an example, as shown in FIG. 1, each bulk transmission device generates a bulk separation signal for generating a bulk frame transmission signal from a terminal transmission signal a output from the terminal device 1-2. And an ISDN signal c from the bulk frame transmission signal a, send it to the ISDN network 3 and receive an ISDN signal from the ISDN network 3, and receive a bulk frame reception signal d-
ISDN interface part 5- for creating 1, d-2
1, 5-2 and the bulk frame reception signals d-1, d
-2, and synchronism detecting sections 6-1 and 6-2 for generating synchronism detection signals f-1 and f-2 from the synchronism detection signals f-1 and f-2.
2, the received bulk frame signals d-1, d-
2, delay correction units 7-1 and 7-2 for generating delay-corrected signals g-1 and g-2, respectively, and the delay-corrected signals g-1 and g-2.
-2 bulk multiplexing unit 8 for generating terminal reception signal b from
The bulk separation unit 4, the ISDN interface units 5-1 and 5-2, the synchronization detection units 6-1 and 6-2, the delay correction units 7-1 and 7-2, and the bulk multiplexing unit 8
And a control unit 9 for controlling the Bulk transmission device 2
The same applies to -1.

The conventional bulk transmission system uses the first ISD
When the N lines are connected, a so-called initial negotiation is performed to exchange information such as the terminal side speed, the number of connections, the connection mode, and the like, and then the required number of lines are sequentially connected to perform data transmission. Such a method will be described with reference to the drawings. The ISDN signals e-1, e- shown in FIG.
Flows 2, 2, e-3, and e-4 exist in both directions in the direction from the ISDN interface 5 to the ISDN network 3 and in the direction from the ISDN 3 to the ISDN interface 5, respectively. Here, for convenience of explanation, the ISDN signals e-1 and e-3 are transmitted from the ISDN interface unit 5 to the ISDN 3 and the ISDN signal e-
2 and e-4 will be described as directions from the ISDN 3 to the ISDN interface 5.

First, the terminal side transmission signal a output from the terminal device 1-2 is output to the bulk transmission device 2-2. In the bulk transmission device 2-2, the bulk demultiplexing unit 4 creates a bulk frame transmission signal c to which a frame signal is added in order to perform bulk transmission, and outputs the signal to the ISDN interface unit 5-1. FIG. 2 is a diagram illustrating a frame format of the bulk transmission method. As shown in FIG. 2, each bulk frame transmission signal c has a frame format including a FAW signal h which is a synchronization signal for bulk transmission.

FIG. 11 shows an example of a format when the terminal side transmission signal a is converted into a plurality of bulk frame transmission signals. The data signals (terminal-side transmission signals a) numbered in order from D1 are separated into eight bulk frame transmission signals c-1 to c-8 in the format shown in FIG. Therefore, within the same time, the first signal outputs the D1 data signal, the second signal outputs the CRC signal of FIG. 2, the third signal outputs the D2 data signal,
The fourth signal outputs a D3 data signal, the fifth signal outputs a D4 data signal, the sixth signal outputs a D5 data signal, and the seventh signal outputs a D6 data signal. Then, the eighth signal outputs a data signal of D7. In FIG. 11, for convenience of explanation, the terminal-side transmission signal a
Has been described assuming that the signal is divided into eight bulk frame transmission signals c-1 to c-8. However, it goes without saying that the signal is actually separated into bulk frame transmission signals corresponding to the number of connection lines.

[0006] The ISDN interface unit 5-1 creates an ISDN signal e-1 from the bulk frame transmission signal c and outputs it to the ISDN network 3. This ISDN signal e-1
Is transmitted to the bulk transmission device 2-1 via the ISDN 3
The signal is input to the bulk transmission device 2-1 as an SDN signal e-2, and data is transmitted to the partner terminal device 1-1.

Similarly, when the ISDN signal e-3 output from the bulk transmission device 2-1 is input to the bulk transmission device 2-2 via the ISDN network 3 as the ISDN signal e-4, the ISDN signal The signal e-4 enters the ISDN interface unit 5-2, and receives the bulk frame reception signal d-2.
Is output to the synchronization detection unit 6-2 and the delay correction unit 7-2. As shown in FIG. 2, the frame reception signal d-2 includes a FAW signal h which is a synchronization signal for bulk transmission. The synchronization detection unit 6-2 detects the FAW signal h, which is a synchronization signal for bulk transmission, and outputs a synchronization detection signal f-2 to notify the delay correction unit 7-2 of the position of the synchronization signal.
Is output.

[0008] The delay correction section 7-2 outputs the synchronization detection signal f.
-2, the FC signal i is extracted from the position of the FC signal i indicating the frame number of the bulk transmission by the output signal
Delay correction is performed to match the frame number (the value of the FC signal i) of all the ISDN signals e received from the N network 3 with the position of the FAW signal h, and this is used as a delay corrected signal g-2 as a bulk multiplexing unit. 8 is output.

FIGS. 12 and 13 show conversion diagrams of the frame reception signal d and the delay-corrected signal g, respectively, and the configuration of the delay correction unit 7, and the delay correction will be described in detail. As shown in FIG. 13, a delay correction unit 7 composed of a large-capacity FIFO
First detects the location where the FC signal i of each frame reception signal d is 0, and places the frame reception signal d at the top where the FC signal i of the frame reception signal d is 0 to FI.
Write to FO. From the write position of the channel where the FC signal i of each frame reception signal d is last,
By reading the signal g after delay correction from O,
Correction is performed so that all delay-corrected signals g come to the positions shown in FIG. At this time, the capacity of the FIFO is 64 frames (1 multiframe) of the frame reception signal d of each channel (256 octets × 64 frames = 1).
6,384 octets). The delay correction as described above is described in, for example, Japanese Patent Application Laid-Open No. 6-1253.
No. 43 discloses a bulk transfer device that transmits information for delay correction in multiframes.

Further, the control unit 9 controls the ISDN as described above.
Such as outgoing / incoming control to the network 3 and multiplexing / demultiplexing control of each channel,
The control of the flow of the data signal in the bulk transmission device 2 is performed based on each sequence. Specific functions of the control unit 9 include processing for transmission / reception to / from the ISDN 3, synchronization detection processing (synchronization detection in the frame mode), delay correction processing (fixed delay amount), bulk multiplexing / demultiplexing processing (each Channel settings, frame / non-frame mode settings),
Outgoing / incoming processing with the terminal device 1 and the like can be mentioned. FIG. 14 shows the configuration of the control unit 9. The control unit 9 includes a CPU 11, a ROM
12-1, a storage device such as a RAM 13, and various interfaces such as a network side interface 14, a parallel interface 15, and a serial interface 16. The above control is mainly performed by a program.

FIG. 3 shows a connection sequence of the conventional bulk transmission method as described above. First, when calling processing is performed from the terminal device 1-1 to the bulk transmission device 2-1, the bulk transmission device 2-1 transmits the bulk transmission device 2-2 via the ISDN network 3.
To the first channel. Then, the bulk transmission device 2-2 notifies the terminal device 1-2 of the incoming call. Then, when connecting to the terminal device 1-1, the terminal device 1-2 notifies the permission of the connection to the bulk transmission device 2-2. After the first channel is established between the terminal devices 1-1 and 1-2 in this way, an initial negotiation is performed between the bulk transmission device 2-1 and the bulk transmission device 2-2 on this channel to perform channel negotiation. After the capacity exchange such as the number of connections and the frame mode method is performed, connection of the nth channel is performed. When the connection of all the channels up to the n-th channel is completed, the I.sub.
Since the delay amounts of the SDN signals e are different from each other, delay correction of each channel is performed on the receiving side. After delay correction for each channel, the amount of delay is fixed for each channel,
The delay amount of each channel is maintained even after the frame is removed. Then, after removing the frame of the bulk transmission and changing to a non-frame, communication is performed between the terminal device 1-1 and the terminal device 1-2.

FIG. 4 is a diagram showing a connection procedure of an ISDN line in the above-mentioned conventional bulk transmission system on a time axis. First, after the first line of the ISDN network 3 is connected, capacity exchange is performed on the first line. At this time, information exchange such as the number of connected channels and the frame mode method is performed. Here, the number n of connected channels is 12 as an example. Then, based on this information, a plurality of ISDN lines corresponding to twelve channels necessary for communication (data transmission) are sequentially connected in the ISDN network 3 from the second line to the twelfth line. At this time, as the transmission rate of the terminal-side data signal increases, the number of required ISDN lines (n) increases.

[0013]

However, in the conventional bulk transmission system, all the ISDN lines up to the n-th line must be connected in order to the ISDN lines corresponding to the transmission speed of the data signal on the terminal side. However, there is a disadvantage that the connection time required until the connection is completed becomes longer in proportion to the transmission speed of the terminal-side data signal. Therefore,
The multi-line bulk transmission system according to the present invention uses the n I
An object of the present invention is to reduce the connection time of an ISDN line by dividing an SDN line into a plurality of blocks each having a fixed number of lines and performing parallel connection of the ISDN lines in units of the plurality of blocks.

[0014]

SUMMARY OF THE INVENTION A multi-line bulk transmission system according to the present invention comprises an ISDN network, at least two bulk transmission devices connected to the ISDN network, and each of the bulk transmission devices connected to the ISDN network. consists of a terminal device to output the terminal transmission signal entering the terminal received signal, a bulk transmission scheme for transmitting and receiving terminal signal using a plurality of ISDN lines, the bulk transmission device the iS
The DN network is divided into a plurality of blocks each having a fixed number of lines as one block, and connection of the plurality of ISDN lines between the bulk transmission devices is performed in parallel for each of the plurality of blocks.

Another aspect of the present invention is a bulk transmission device that connects a terminal device that outputs a terminal transmission signal and inputs a terminal reception signal to an ISDN network and transmits and receives a terminal signal using a plurality of ISDN lines. A bulk demultiplexing unit that generates a bulk frame transmission signal from the terminal transmission signal; and generates an ISDN signal from the bulk frame transmission signal and transmits the signal to the ISDN network.
An ISDN interface unit that receives an SDN signal and creates a bulk frame reception signal from the ISDN signal; a synchronization detection unit that creates a synchronization detection signal from the bulk frame reception signal; and the bulk frame reception signal based on the synchronization detection signal A delay compensating unit that produces a signal after delay compensation from the same, a bulk multiplexing unit that creates a terminal reception signal from the signal after delay compensation, the bulk demultiplexing unit, the synchronization detection unit, the delay compensation unit, and the bulk multiplexing. And IS
And a control unit for controlling the DN interface unit, wherein
When the control unit connects to the ISDN network, the fixed number of lines is set to one.
The ISDN interface unit is controlled so that connection of the plurality of ISDN lines as blocks is performed in parallel for each block.

In the present invention, connection of ISDN lines is performed in parallel for each block composed of a fixed number of lines. Therefore, the connection time after the completion of capacity exchange is determined by the number of lines required for communication between terminal devices. The connection time is a fixed time (the fixed number of line connection times of a maximum of one block) without being affected by. Therefore, it is possible to shorten the connection time until connection of all ISDN lines is completed. Further, the bulk transmission method and the apparatus according to the present invention perform information exchange as to whether the connection in the block unit is possible on the first ISDN line in the ISDN network, and, if possible, the plurality of ISDNs. The connection of lines is performed in parallel in the block unit, and if not possible, the plurality of ISDN lines are connected by a conventional bulk transmission method, that is, sequentially connected. This enables connection with the conventional bulk transmission system.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. The configuration of the bulk transmission system according to the first embodiment of the present invention is similar to the conventional bulk transmission system shown in FIG. 1, and includes a pair of terminal devices 1-1 and 1-2 for performing data transmission and an ISDN network. 3 and bulk transmission devices 2-1 and 2-2 for connecting the terminal devices 1-1 and 1-2 to the ISDN network 3, respectively. Here, taking the bulk transmission device 2-2 as an example, as shown in FIG. 1, each bulk transmission device generates a bulk separation signal for generating a bulk frame transmission signal from a terminal transmission signal a output from the terminal device 1-2. From the bulk frame transmission signal a
A DN signal c is created and transmitted to the ISDN network 3, and an ISDN signal is received from the ISDN network 3. Bulk frame reception signals d-1, d-
ISDN interface units 5-1 and 5-2 for creating a network 2
And a synchronization detector 6 for generating synchronization detection signals f-1 and f-2 from the bulk frame reception signals d-1 and d-2.
1, 6-2, and delay correction for generating delay-corrected signals g-1, g-2 from the bulk frame reception signals d-1, d-2 based on the synchronization detection signals f-1, f-2. Part 7-
1, 7-2, a bulk multiplexing unit 8 for generating a terminal received signal b from the delay corrected signals g-1, g-2, the bulk demultiplexing unit 4, and the ISDN interface unit 5-
1, 5-2, the synchronization detection units 6-1 and 6-2, the delay correction units 7-1 and 7-2, and a control unit 9 for controlling the bulk multiplexing unit 8. The same configuration applies to the bulk transmission device 2-1.

The control unit 9 of the bulk transmission device 2-2 (2-1) controls the bulk separation unit 4, the ISDN interface units 5-1 and 5-2 according to the connection sequence of the bulk transmission as shown in FIG. It controls the synchronization detection units 6-1 and 6-2, the delay correction units 7-1 and 7-2, and the bulk multiplexing unit 8. First, when the terminal device 1-1 performs a calling process to the bulk transmission device 2-1, the bulk transmission device 2-1 connects the first channel to the bulk transmission device 2-2 via the ISDN network 3. . The operation of the control unit 9 at this time is as follows with reference to FIG. The CPU 11 executes terminal processing 1-1.
From the ISDN 3 via the network-side interface 14. At the same time, each channel is allocated to the multiplexing unit 3 and the demultiplexing unit 4 via the parallel interface 15-3. On the other hand, the bulk transmission device 2-2 notifies the terminal device 1-2 of the incoming call, and when the terminal device 1-2 is connected to the terminal device 1-1, the connection to the bulk transmission device 2-2 is established. Notify permission. Referring to FIG. 14 again, the operation of the control unit 9 at this time is such that the CPU 11 accepts an incoming call process from the ISDN interface 5 via the network interface 14, and performs a terminal process 1-1 via the serial interface 16.
2 is subjected to an incoming call process. At the same time, each channel is allocated to the multiplexing unit 3 and the demultiplexing unit 4 via the parallel interface 15-3.

The initial negotiation is performed on the first channel thus established. In this embodiment, at this time, the capacity exchange such as the number of connected channels (n), the non-frame mode method, and the connection in block units is performed between the bulk transmission device 2-1 and the bulk transmission device 2-2. If block-by-block connection is possible, channel connection is performed for each block as described below. Here, a case where n = 12 ISDN lines are connected will be described below as an example.

In the present embodiment, the ISDN network 3 is divided into three blocks, ie, first to third blocks, and among the twelve ISDN lines between the two bulk transmission devices 2-1 and 2-2, Connection is performed in parallel for each block for 11 lines except the established first line. FIG. 6 shows the connection procedure of such bulk transmission on the time axis. After connecting the first line in the ISDN network 3 and exchanging the capacity, the connection is carried out in units of three blocks from the first to the third, and the total connected for each block is from the second line to the second line. Connections are made until there are 12 lines.

After the connection of all 12 channels is completed in this way, the delay amount of the ISDN signal e when passing through the ISDN network 3 differs for each channel. Correction is performed (FIG. 5). The delay correction of each channel is performed in the delay correction unit 7.
After the delay correction of each channel, the delay amount of each channel is fixed, and the delay amount of each channel is maintained even after the frame is removed. At this time, the operation of the control unit 9 is based on the CP
U11 (see FIG. 14) is a parallel interface 15-
The delay amount fixing unit 7 performs a delay amount fixing process via the delay unit 2. Then, after removing the frame of the bulk transmission and changing to a non-frame, communication is performed between the terminal device 1-1 and the terminal device 1-2. At this time, the control unit 9 controls the parallel interface 1
The processing for changing to the non-frame mode is performed on the multiplexing unit 8 and the demultiplexing unit 4 via 5-3. The above control is realized by a control program stored in the control unit 9.

As described above, the fixed number of lines of the ISDN signal e connected to the ISDN network 3 is divided into a plurality of blocks as one block.
Since the connection to the network is implemented, the connection time of the ISDN line after the capacity exchange can be reduced. In the present embodiment, an example has been described in which three blocks each having a fixed number of lines are used. However, by using a large number of blocks, the time from the completion of the capacity exchange to the completion of the connection can be reduced by the line of each block. Number of connection times. Therefore, it is possible to set a fixed time (line connection time of one block) without being affected by the number of lines to be connected.

Next, a second embodiment of the present invention will be described with reference to FIG. 1 and FIGS. FIG. 7 shows a block diagram of the bulk transmission device according to the present embodiment. This bulk transmission device is 512
kb / s (64 kb / s, 8 channels) are connected (see FIG. 1), and the connection / disconnection notification from the terminal device 1 is turned on / off of the terminal-side ER signal 1 to connect / disconnect from the bulk transmission device 2. The disconnection notification is performed by turning on / off the terminal-side CD signal m. Accordingly, since the bulk transmission device 2-2 is connected to the transmission line of 512 kb / s from the ISDN network 3, it corresponds to four lines (one line has 2 channels of 64 kb / s).
Channel), and at the same time, the synchronization detector 6 and the delay corrector 7 both
There are channels.

The output from the bulk separation unit 4 is separated into eight channels and output to the ISDN interface unit 5. On the other hand, the bulk multiplexing unit 8 outputs the delay-corrected data output from the delay correction unit 7 for eight channels. The signal g is input. The terminal-side RD signal j output from the bulk multiplexing unit 8 is input to the terminal device 1, and the terminal-side SD signal k output from the terminal device 1 is input to the bulk demultiplexing unit 4. Also,
The terminal-side ER signal 1 for performing connection / disconnection control is output from the terminal device 1 and input to the control unit 9, and the terminal-side CD signal m is output from the control unit 9 and input to the terminal device 1. Therefore, the terminal transmission signal a shown in FIG. 1 is a terminal side SD signal k and a terminal side ER signal 1, and the terminal side reception signal b is a terminal side RD signal.
A signal j and a terminal-side CD signal m are obtained.

FIG. 8 shows a connection sequence of bulk transmission according to the present embodiment. First, the terminal device 1-1 sends a terminal-side ER signal 1-1 as a connection notification to the bulk transmission device 2-1.
Is turned on, the bulk transmission device 2-1 makes the ISDN network 3
The first channel is connected to the bulk transmission device 2-2 via the. Then, the bulk transmission device 2-2 becomes the terminal device 1
When the terminal device 1-2 is connected to the terminal device 1-1, the terminal device 1-2 is turned on as the notification of the incoming call to the bulk transmission device 2-2. The side ER signal 1-2 is turned on. Thereafter, on the first channel thus established, the bulk transmission device 2
-1 and the bulk transmission device 2-2, the capacity exchange such as the connection number of eight channels, the non-frame mode method, and the connection of each block is performed, and the connection of each channel is performed for each block. Is carried out.

FIG. 9 shows the connection procedure at this time. First I
When the first line is connected in the SDN network 3, initial negotiation including capability exchange is performed on the first line. On the other hand, the ISDN line of the ISDN network 3 is divided into first and second blocks, and after the capability exchange, the lines are connected in each of these two blocks. That is, lines are connected in parallel in the two blocks. Such parallel processing is performed until the total number of lines connected for each block changes from the second line to the eighth line.

After the connection of all the channels is completed in this way, the IS when passing through the ISDN network 3 is set for each channel.
Since the delay amount of the DN signal e is different, the delay correction of each channel is performed on the receiving side, and after the delay correction of each channel,
The delay amount of each channel is fixed, and the delay amount of each channel is held even after the frame is removed (see FIG. 8). Then, after removing the frame of the bulk transmission and changing to a non-frame, communication is performed between the terminal device 1-1 and the terminal device 1-2.

As described above, by performing line connection in parallel for each of a plurality of blocks, the connection time can be reduced. Also, as a result of the capability exchange on the first channel, if it is found that the bulk transmission device 2-1 does not have the capability to perform connection in units of blocks, the control unit 9 of the bulk transmission device 2-2. As in the past, the ISDN interface 5-
1 to 5-4 are controlled. Therefore, it is possible to coexist with the conventional bulk transmission system.

Next, a bulk transmission apparatus according to a third embodiment of the present invention will be described with reference to FIG. FIG.
0 is a block diagram illustrating a configuration of the bulk transmission device according to the present embodiment. Bulk transmission device 2-1, 2-2
Connect the terminal devices 1-1 and 1-2 to the ISDN network 3, respectively. Here, ISDN network 3 is connected to bulk transmission devices 2-1 and 2-2 by 1500 lines of PCM primary group.
12 kb / s (64 kb / s 8 channels) are connected, the connection / disconnection notification from the terminal device 1 is ON / OFF of the terminal side ER signal 1, and the connection / disconnection notification from the bulk transmission device 2 is This is performed by turning on / off the side CD signal m. In the case of 1500 lines, since one line has 24 channels of 64 kb / s, the bulk transmission device 2-2
Is an ISDN 1500 interface unit 10 for one line connected to a 512 kb / s transmission line from the ISDN network 3.
And a synchronization detection unit 6 and a delay correction unit 7 for eight channels. Although not shown in FIG. 10, the bulk transmission device 2-1 has the same configuration as the bulk transmission device 2-2. Hereinafter, the operation of the bulk transmission device according to the present embodiment will be described using the bulk transmission device 2-2 as an example.

In the above-described bulk transmission apparatus, the terminal-side SD signal k output from the terminal apparatus 1 is input to the bulk demultiplexing section 4, and the output from the bulk demultiplexing section 4 is separated into eight channels, and the ISDN 1500 The data is input to the interface unit 10. On the other hand, the delay-compensated signal g output from the delay compensation unit 7 for eight channels is input to the bulk multiplexing unit 8, and the terminal RD from the bulk multiplexing unit 8 is input.
The signal j is output to the terminal device 1. The terminal-side ER signal 1 for performing connection / disconnection control is output from the terminal device 1 and input to the control unit 9, and the terminal-side CD signal m is output from the control unit 9 and input to the terminal device 1. Therefore, the terminal transmission signal a shown in FIG. 1 becomes the terminal side SD signal k and the terminal side ER signal 1, and the terminal side reception signal b becomes the terminal side RD signal j and the terminal side CD signal m.

The bulk transmission device as described above is an ISDN
When connecting to the network 3, after exchanging capabilities, the control unit 9 controls the ISDN 1500 interface unit 10 so as to connect ISDN lines in parallel for each block having a fixed number of lines. Such control is realized by a control program stored in the control unit 9. By connecting the ISDN lines in parallel for each block composed of a fixed number of lines, the connection time after the completion of the capacity exchange is affected by the number of lines required for communication between the terminal devices. Instead, the connection time becomes a fixed time (the fixed number of line connection times of one block at the maximum). Therefore,
It is possible to shorten the connection time until connection of all ISDN lines is completed.

[0032]

According to the present invention, connection of ISDN lines is carried out in parallel for each block consisting of a fixed number of lines, so that connection time from completion of capacity exchange until connection of all ISDN lines is completed. Can be shortened. In particular,
By performing connection processing in parallel using many blocks, the time from the completion of the capacity exchange to the completion of the connection can be fixed time, that is, the number of lines in each block, without being affected by the number of lines connected. The connection time can be set.

Further, the bulk transmission system and apparatus according to the present invention perform information exchange as to whether or not connection in the above-mentioned block unit is possible at the time of capability exchange.
The connection of the DN lines is performed in parallel in block units, and if not possible, the connection is performed by the conventional bulk transmission method, that is, the connection is sequentially performed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a multi-line bulk transmission system and apparatus.

FIG. 2 is a diagram illustrating a frame format of a multi-line bulk transmission system.

FIG. 3 is a diagram illustrating a connection sequence in a conventional multi-line bulk transmission scheme.

FIG. 4 is a diagram showing a connection procedure of a conventional multi-line bulk transmission scheme on a time axis.

FIG. 5 is a diagram illustrating a connection sequence of the multi-line bulk transmission system according to the first embodiment of the present invention.

FIG. 6 is a diagram showing a connection procedure of the multi-line bulk transmission system according to the first embodiment of the present invention on a time axis.

FIG. 7 is a block diagram showing a configuration of a multi-line bulk transmission system and apparatus according to a second embodiment of the present invention.

FIG. 8 is a diagram illustrating a connection sequence in the multi-line bulk transmission system according to the second embodiment of the present invention.

FIG. 9 is a diagram illustrating a connection procedure of a multi-line bulk transmission method according to a second embodiment of the present invention on a time axis.

FIG. 10 is a block diagram showing a configuration of a multi-line bulk transmission system and apparatus according to a third embodiment of the present invention.

FIG. 11 is a diagram illustrating an example of a format when a terminal-side transmission signal a is converted into a plurality of bulk frame transmission signals.

FIG. 12 is a conversion diagram illustrating a relationship between a frame received signal d and a signal g after delay correction.

FIG. 13 is a diagram illustrating a delay correction unit.

FIG. 14 is a diagram illustrating the operation of the control unit.

[Explanation of symbols]

1 ... terminal equipment, 2 ... bulk transmission equipment, 3 ... ISDN network,
4: Bulk separation unit, 5: ISDN interface unit,
6 synchronization detector, 7 delay correction unit, 8 bulk multiplexing unit, 9 control unit, 10 ISDN 1500 interface unit, 11 CPU, 12 ROM, 13 RAM, 1
4: Network side interface, 15: Parallel interface, 16: Serial interface, a: Terminal transmission signal, b: Terminal reception signal, c: Bulk frame transmission signal,
d: Bulk frame reception signal, e: ISDN signal, f ...
Synchronization detection signal, g: delay correction signal, h: FAW signal (frame synchronization signal), i: FC signal (frame number signal), j: terminal-side RD signal, k: terminal-side SD signal, l ...
Terminal-side ER signal, m: Terminal-side CD signal.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04L 29/00 H04L 29/08

Claims (5)

(57) [Claims] 1. An ISDN network, at least two bulk transmission devices connected to the ISDN network, and a terminal device connected to each of the bulk transmission devices for outputting a terminal transmission signal and inputting a terminal reception signal. In a bulk transmission system for transmitting / receiving a terminal signal using a plurality of ISDN lines, the bulk transmission device divides the ISDN line of the ISDN network into a plurality of blocks, and ISDN
A multi-line bulk transmission system, wherein line connections are processed in parallel in the block units. 2. An ISDN network, at least two bulk transmission devices connected to the ISDN network, and a terminal device connected to each of the bulk transmission devices for outputting a terminal transmission signal and inputting a terminal reception signal. In a bulk transmission method for transmitting / receiving a terminal signal using a plurality of ISDN lines, the bulk transmission device divides the ISDN network into a plurality of blocks each having a fixed number of lines as one block. A multi-line bulk transmission method, wherein connection of the plurality of ISDN lines between transmission devices is performed in parallel for each of the plurality of blocks. 3. A multi according to claim 1 or claim 2
In the line bulk transmission method, the bulk transmission device performs information exchange as to whether connection in the block unit is possible on a first ISDN line in the ISDN network,
As a result, if connection in units of blocks is possible, connection of the plurality of ISDN lines is performed in parallel in units of blocks, and if not, the plurality of ISDN lines are sequentially connected. Circuit bulk transmission method. 4. A bulk transmission device for connecting a terminal device for outputting a terminal transmission signal and for inputting a terminal reception signal to an ISDN network and transmitting / receiving a terminal-side signal using a plurality of ISDN lines. A bulk demultiplexing unit that generates a bulk frame transmission signal from the signal, and generates an ISDN signal from the bulk frame transmission signal, transmits the ISDN signal to the ISDN network, receives an ISDN signal from the ISDN network, and receives a bulk frame from the ISDN signal. An ISDN interface unit that creates a signal; a synchronization detection unit that creates a synchronization detection signal from the bulk frame reception signal; and a delay correction unit that creates a delay-corrected signal from the bulk frame reception signal based on the synchronization detection signal. A bulk multiplexing unit that creates a terminal reception signal from the delay-corrected signal; A control unit that controls the demultiplexing unit, the synchronization detection unit, the delay correction unit, the bulk multiplexing unit, and the ISDN interface unit, wherein the control unit is configured to control the plurality of ISDNs when connecting to the ISDN network. The ISD is connected so that connection of the line is performed in parallel for each of a plurality of blocks obtained by dividing the ISDN network by a certain number of lines.
A multi-line bulk transmission device characterized by controlling an N interface unit. 5. The multi-line bulk transmission device according to claim 4, wherein the control unit exchanges information as to whether the connection in units of blocks is possible on a first ISDN line, and as a result, A multi-line bulk transmission apparatus, characterized in that if a unit connection is possible, an ISDN line is connected in units of the block, and if not, the plurality of ISDN lines are connected sequentially.