JP2002314607A - Bulk transfer system, its bulk transferring method and bulk transfer program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ATM bulk transfer which ensures temporal relative relations between B channels in an ISDN line and makes a data receiving side surely restore transmitted data. SOLUTION: This bulk transfer system is provided with a bulk transferring device for merging data subjected to bulk transfer that simultaneously uses a plurality of channels into one channel and relaying the data, and the bulk transferring device is provided with a means for merging received data of each ISDN channel to generate an AAL2 CPS packet, a means for merging the generated AAL2 CPS packets to generate an AAL2 CPS-PDU, a means for merging the generated AAL2 CPS-PDU to the payload part of an ATM cell to generate an ATM cell, a means for dividing the received ATM cell into AAL2 CPU packets, and a means for dividing the divided AAL2 CPS packet into each piece of channel data of an ISDN.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a loop emulation service function for transferring analog telephone and ISDN communication using AAL2 of ATM, and more particularly, to ISDN.
The present invention relates to a bulk transfer system, a bulk transfer method and a bulk transfer program for realizing ISDN bulk transfer by merging a plurality of data channels into one AAL2 channel and transferring the merged data channels.

[0002]

2. Description of the Related Art Generally, an access network from a user's home to a network operator is physically or time-divisionally connected in a "1: 1" manner. Attempts have been made to increase efficiency. Among these methods, Loop Emu is a method of transferring existing analog telephones and ISDN lines by ATM while maintaining the current service.
A method called lation Service has been proposed.

In the Loop Emulation Service system,
Each channel of the ISDN line, that is, 2 in the case of the ISDN basic interface (BRI: Basic Rate Interface)
One B channel (64Kbps) and one D channel (16Kbps)
s) is transmitted and received in separate AAL2 CPS packets.

[0004] In ISDN, when performing data transfer,
A communication path with the other party is set using the D channel, and then data transfer is performed at a transmission rate of 64 Kbps using the B channel. When high-speed data transfer of 64 Kbps or more is performed by the ISDN basic interface, one transmission data is transmitted in parallel using two B channels on the transmission side, and two B channels are transmitted on the reception side. The data is combined with the received data and restored to the original data. This method is called ISDN bulk transfer.

[0005]

However, as described above, the conventional bulk transfer has the following problems.

Conventionally, ISDN bulk transfer is performed by Loop Emu
With the lation service method, each B channel of ISDN is allocated to a different AAL2 CPS packet. If there is an AAL2 switch that performs switching in units of AAL2 CPS packets in the ATM network, the delay difference between AAL2 CPS packets obtained by merging each B channel is not guaranteed, and greatly varies depending on the congestion state of the network.

Due to the delay difference fluctuation, it is very difficult for the ISDN terminal adapter supporting the bulk transfer to notify the delay difference of each channel to each other and to absorb the difference by the delay difference absorbing buffer. However, there is a problem that the temporal order of the data is reversed at the time of data restoration in the above, and accurate data cannot be restored.

An object of the present invention is to solve the above-mentioned disadvantages of the prior art, and to perform one AAL2
By merging a plurality of B channels into the CPS packet in the order of input data in byte units from the ISDN line,
Provided is a bulk transfer system, a bulk transfer method, and a bulk transfer program capable of reliably restoring original data on a data receiving side by preventing a delay difference between B channels in an ATM network from occurring. It is.

[0009]

In order to achieve the above object, a bulk transfer system according to the present invention comprises a bulk transfer device for merging data to be bulk-transferred simultaneously using a plurality of channels into one channel and relaying the merged data. The bulk transfer apparatus further comprises means for receiving data bulk-transferred using the plurality of channels, and sequentially merging the data based on a temporal relationship to generate a transmission packet. And

According to a second aspect of the present invention, in the bulk transfer apparatus, the bulk transfer device sequentially merges data bulk-transferred by each channel of the ISDN based on a temporal relative relationship to generate an ATM cell. ATM line 1
It is characterized by relaying through two channels.

According to a third aspect of the present invention, there is provided the bulk transfer system, wherein the bulk transfer device merges the received data of each channel of the ISDN to generate an AAL2 CPS packet; Merge
Means for generating an AAL2 CPS-PDU, and the generated AAL2 C
ATM by merging PS-PDU into payload of ATM cell
It is characterized by comprising means for generating cells.

According to a fourth aspect of the present invention, there is provided the bulk transfer system, wherein the bulk transfer device transmits the received ATM cell to AAL2.
Means for dividing into CPS packets, and the divided AAL2 C
It is characterized by comprising means for dividing a PS packet into each channel data of ISDN.

According to a fifth aspect of the present invention, in the bulk transfer system, the bulk transfer device is a CP-IWF device.

According to a sixth aspect of the present invention, in the bulk transfer system, the bulk transfer device is a CO-IWF device.

According to a seventh aspect of the present invention, there is provided a bulk transfer apparatus which receives data which is bulk-transferred simultaneously using a plurality of channels, and sequentially merges the data based on a temporal relative relationship to generate a transmission packet. Means for merging data bulk-transferred using the plurality of channels into one channel and relaying the merged data.

According to another aspect of the present invention, there is provided a bulk transfer apparatus comprising:
The data transferred in bulk by each channel of SDN is
It is characterized in that ATM cells are sequentially merged based on a temporal relative relationship to generate an ATM cell and relayed through one channel of an ATM line.

According to a ninth aspect of the present invention, the bulk transfer apparatus of the present invention merges the received data of each channel of the ISDN to AAL2
Means for generating a CPS packet, and the generated AAL2 C
It is characterized by comprising means for generating an AAL2 CPS-PDU by merging PS packets, and means for generating the ATM cell by merging the generated AAL2 CPS-PDU into a payload portion of an ATM cell.

According to a tenth aspect of the present invention, there is provided a bulk transfer device comprising:
It is characterized by comprising means for dividing a received ATM cell into AAL2 CPS packets, and means for dividing the divided AAL2 CPS packets into respective ISDN channel data.

The bulk transfer method of the present invention according to claim 11 is as follows:
Receiving data to be bulk-transferred using a plurality of channels simultaneously and generating a transmission packet by sequentially merging each of the data based on a temporal relative relationship;
Data bulk-transferred using the plurality of channels is merged into one channel and relayed.

According to a twelfth aspect of the present invention, there is provided a bulk transfer method comprising:
It is characterized in that data bulk-transferred by each channel of the ISDN is sequentially merged based on a temporal relative relationship to generate an ATM cell and relayed by one channel of the ATM line.

According to a thirteenth aspect of the present invention, there is provided a bulk transfer method comprising:
AA by merging the received ISDN channel data
Generating an L2 CPS packet; and
The method comprises the steps of generating an AAL2 CPS-PDU by merging AAL2 CPS packets and merging the generated AAL2 CPS-PDU into a payload portion of an ATM cell to generate an ATM cell.

According to a fourteenth aspect of the present invention, there is provided a bulk transfer method comprising:
The method comprises the steps of: dividing the received ATM cell into AAL2 CPS packets; and dividing the divided AAL2 CPS packets into respective ISDN channel data.

According to a fifteenth aspect of the present invention, there is provided a bulk transfer program for receiving data to be bulk-transferred using a plurality of channels at the same time, identifying a temporal relationship between the received data, and Causing a computer to execute a process of sequentially generating merged packets based on the relative relationship by controlling a computer, and merging data transferred in bulk using the plurality of channels into one channel and relaying the merged data. It is characterized by.

[0024]

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

The present invention relates to an ATM (Asynchronous Transfe
r Mode) using AAL2 (ATM Adaptation Layer 2), analog telephone and ISDN (Integrated Services).
Digital Network) Loop Emulation Service
In an IWF (Interworking Function) device (bulk transfer device) that realizes a function, a plurality of ISDN data channels are merged into one AAL2 channel and transferred, thereby realizing bulk transfer of ISDN. .

FIG. 1 is a diagram showing an example of a network configuration according to an embodiment of the present invention.

Referring to FIG. 1, the network configuration according to the present embodiment is such that terminals 30 of respective users communicate with each other through ATM network 40.
From the TM network 40, the CP adopting the method of the present invention
-Converts ATM cells to ISDN channel data through an IWF (Customer Premises Interwoking Function) device 10, and further converts the ISDN terminal adapter 2
0 shows a configuration for connecting to the user's terminal 30.

On the right side, from the ATM network 40, a CO-IWF (Central Office I) adopting the method of the present invention is used.
The conversion between the ATM cell and each channel data of the ISDN is performed through the device 50,
A configuration is shown in which connection is made to a user terminal 30 via an SDN exchange 60 and an ISDN terminal adapter 20.

The bulk transfer device of the present invention refers to the CP-IWF device 10 and the CO-IWF device 50.

The user's terminal 30 is an information processing terminal or a communication terminal having a communication function. For example, by using a personal computer or the like for accessing the Internet, the terminal 30 is connected to an interface such as Ethernet (registered trademark) or USB. Connect to ISDN terminal adapter 20
Can be connected to SDN line.

The CP-IWF device 10 accommodates an ISDN line from the ISDN terminal adapter 20 and transmits ISDN data transmitted through a plurality of channels of the ISDN line.
Performs bulk transfer using ATM line AAL2. Further, when such a bulk transfer is received from the ATM network 40, the CP-IWF device 10 restores each channel data of the ISDN and transfers the data to the user terminal 30 via the ISDN terminal adapter 20.

Similarly, the CO-IWF device 50 accommodates an ISDN line from the ISDN exchange 60 and converts the ISDN data transmitted through a plurality of channels of the ISDN line into an ATDN.
Perform bulk transfer using AAL2 of M line. Also, CO
When receiving such a bulk transfer from the ATM network 40, the -IWF device 50 similarly reproduces the ISDN interface from a plurality of AAL2 connections of the ISDN, and connects to the communication destination terminal 30 via the ISDN exchange 60. .

FIG. 2 shows a CP-IWF device 1 according to the present embodiment.
FIG. 4 is a diagram illustrating an example of a configuration of a zero. Also, the CO-IWF device 50
The same applies to the device configuration.

Referring to FIG. 2, the CP-IWF of the present embodiment
The device 10 includes an ISDN terminator 1 for terminating an ISDN line.
1. AAL2 CPS processing unit 12 for converting each channel data of ISDN and AAL2 CPS packet, ATM processing unit 13 for converting AAL2 CPS packet and ATM cell, AT
An ATM line unit 14 for connecting to the M line is provided.
AAL2 channel control table (transmission processing 15-1, reception processing 15-1) referred to by the CPS processing unit 12 for conversion processing.
-2), an ATM channel control table 16 referred to by the ATM processing unit 13 for conversion processing is provided.

The process of converting each ISDN channel data into ATM cells and performing bulk transfer by the CP-IWF device 10 will be described with reference to the flowchart of FIG.

First, the ISDN line is terminated by the ISDN terminating unit 11 provided for each accommodated ISDN line,
The ISDN channel data from the DN terminal adapter 20 is connected to the AAL2 CPS processing unit 12 via a serial interface to which each channel data is allocated in a time-division manner (step 301).

AAL2 CPS (AAL2 Common Part Sub
layer) The processing unit 12 refers to the AAL2 channel control table 15-1 (for transmission) indicating which AAL2 CPS packet is to be merged with the ISDN channel assigned to each time slot, and refers to each AAL2 CPS packet. Is generated (step 302), and the AAL2 CPS packet is transferred to the ATM processing unit 13.

In the ATM processing unit 13, the received AA
The L2 CPS packet is converted to an ATM channel control table 16 indicating information for referring to information in a header portion of the ATM cell.
AAL2 CPS-PDU (CPS Protocol D)
ata Unit) (step 303), and its AAL2 CPS
-Merge the PDU into the payload of the ATM cell to generate an ATM cell (step 304). Then, the generated ATM cell is transmitted from the ATM line unit 14 to the ATM network 40 (step 305).

Next, the process of converting ATM cells for bulk transfer of ISDN data to the original ISDN channel data by the CP-IWF device 10 will be described with reference to the flowchart of FIG.

First, the input data from the ATM network 40 is received via the ATM line unit 14 (step 401), and the received AT data is sent to the ATM processing unit 13.
Divide M cells into AAL2 CPS packets (step 40)
2). Then, the AAL2 CPS processing unit 12 refers to the (reception) AAL2 channel control table 15-2 indicating a setting for dividing the AAL2 CPS packet into each ISDN channel data, and converts the AAL2 CPS packet into each ISDN channel. It is divided into data (step 403). Then, each channel data is transmitted to the ISDN line side via the ISDN terminating unit 11 which is a serial interface to which each channel data is allocated in a time division manner (step 40).
4).

Here, the AAL2 channel control table 15-
1 and 15-2, each channel of ISDN is AAL2
The conditions for CPS packetization are set and recorded. The condition for AAL2 CPS packetization is that each data channel of ISDN is transferred by an individual AAL2 CPS packet, or that a plurality of ISDN channels are bundled for one.
It indicates the setting of whether to transfer by one AAL2 CPS packet.

The AAL2 CPS processor 12 converts each channel of the ISDN from the ISDN line into AAL2 CPS packets according to the AAL2 CPS packetization conditions set in the AAL2 channel control table 15-1 (for transmission). This allows I
Each channel data of the SDN is bulk-transferred according to the conditions of AAL2 CPS packetization.

The AAL2 CPS processor 12 converts the AAL2 CPS packet received from the ATM network 40 into an ISDN
When dividing into each channel of the AAL2 CPS packet and the ISDN, the channel is set to “1: 1” based on the conditions of the AAL2 CPS packetization set in the AAL2 channel control table 15-2 (for reception). Do you make it correspond to “1: N” (N
) Correspond to a predetermined constant, N = 2, 3,...).

If the "1: N" correspondence is set, the AAL2 CPS processor 12 distributes the data in the AAL2 CPS packet to "N" ISDN channels in accordance with the setting.

Next, the processing of bulk transfer by the bulk transfer system of the present embodiment will be described in more detail with reference to the drawings. In FIG. 2, the CP-IWF according to the present embodiment, in which a plurality of ISDN basic interface lines are accommodated and each channel data of ISDN is converted into ATM cells by AAL2 and transferred.
1 shows an example of a device 10 (bulk transfer device).

First, the processing in the direction from the ISDN line to the ATM line will be described along the data flow.

The ISDN terminating unit 11 accommodates an ISDN line, and receives data received in each channel through an interface (data format) shown in FIG.
Send to PS processing unit 12.

The AAL2 CPS processing section 12 has an interface for transmitting and receiving data to and from the ISDN terminating section 11 for each ISDN line according to the data format shown in FIG. When receiving the data received in each of the channels from the ISDN terminating unit 11, the AAL2 channel control table 15-1 reads
Obtain information specifying how to merge data of each channel of the DN into an AAL2 CPS packet. In the AAL2 channel control table 15-1, information for specifying the conditions for the AAL2 CPS packetization is set for each ISDN port.

FIG. 6 is a diagram showing an example of the data structure of the AAL2 channel control table 15-1 for transmission according to the present embodiment. The AAL2 CPS packet is obtained from the data of the ISDN B1 and B2 channels. Fig. 3 shows a table for generating.

In the transmission AAL2 channel control table 15-1 in the example of FIG. 6, the identifier B of the AAL2 CPS packet is
“CID-B1” for one channel, “CID-B2” for B2 channel, and “LI-B1” for B1 channel for setting the packet length of each data and AAL2 CPS packet
And "LI-B2" for the B2 channel, "UUI-B1" for the B1 channel for setting the increment value of the UUI field used for the sequence number and the like, and "UUI-B2" for the B2 channel. Each data of "BALK" which is a setting of whether or not to
Provided for each port.

The AAL2 CPS processing unit 12 refers to the transmission AAL2 channel control table 15-1 and converts the data of each channel of the ISDN (here, the data of the B1 and B2 channels) into the example of FIG. Convert to the indicated AAL2 CPS packet. The information for generating the AAL2 CPS packet when the bulk transfer is set uses the set values set in the respective fields for the B1 channel, and the generation of the AAL2 CPS packet is performed temporally as shown in FIG. AA with relative relationship
Convert to L2 CPS packet.

The AAL2 CPS packet generated by the AAL2 CPS processing unit 12 uses the data format shown in FIG.
The AAL2 CPS processing unit 12 sends the AAL2 CPS packet to the ATM processing unit 1 together with the information on the ISDN line port number to which the AAL2 CPS packet was input.
Send to 3.

The ATM processing unit 13 refers to the ATM channel control table 16 based on the information of the AAL2 CPS packet and its ISDN line port number received from the AAL2 CPS processing unit 12 in the data format shown in FIG. To determine the ATM connection to be used. And
The ATM processing unit 13 uses the ATM connection when an output cycle of the ATM connection occurs.
Merge one or more AAL2 CPS packets and Figure 10
Then, the CPS-PDU packet shown in the example is generated, and the generated CPS-PDU is merged into a payload portion of the ATM connection to generate an ATM cell. Then, the generated ATM cell is output from the ATM line unit 14 onto the ATM network 40.

Next, processing in the direction from the ATM line to the ISDN line will be described along the flow of data.

The ATM line section 14 receives the ATM cell and sends it to the ATM processing section 13.

The ATM processing unit 13 extracts a CPS-PDU packet from the payload of the ATM cell, and extracts an AAL2 CPS packet from the CPS-PDU. Then, the ATM processing unit 13 transmits this data to the AAL2 CPS processing unit 12 in the data format shown in FIG.

The AAL2 CPS processing section 12 receives a VPI (Virtual Path Ind), which is connection information of the received ATM cell.
), a VCI (Virtual Channel Indication) value, and a CID value that is an AAL2 CPS packet identifier, the AAL2 channel control table 15-2 (for reception processing) shown in FIG. 12 is searched. Then, from the AAL2 channel control table 15-2, “ISDN port” indicating the ISDN line to be output and “BA” indicating whether the bulk transfer is in progress.
LK "and data of each setting of" B1 / B2 "indicating whether to output to the B1 channel or the B2 channel of the ISDN.

The AAL2 CPS processing unit 12, when "BALK" indicates that the transfer is not a bulk transfer, the AAL2 CPS processing unit 12
The packet data is sent to the ISDN termination unit 11 in the data format shown in FIG. Further, when the bulk setting is performed, as shown in FIG.
The data is processed and the IS is processed so that the temporal relative relationship (before and after relationship) between channel 1 and B2 channel is the same as that on the transmitting side.
It is sent to the DN termination unit 11. Then, the ISDN termination unit 11
Outputs the data transmitted from the AAL2 CPS processing unit 12 from the designated channel.

As described above, according to the bulk transfer system of the present embodiment, the loop emula using the network using the ATM AAL2 as the access network.
Also in the tionService, it is possible to carry out the bulk transfer of the ISDN which guarantees the time relationship of each channel of the ISDN.

In the bulk transfer according to the present invention, as a transmission source line of the data to be relayed, not only an ISDN line but also a line for transmitting data using a plurality of other channels simultaneously can be used. In addition, the line used for the relay is not limited to the ATM line, and data transmitted by a plurality of channels can be merged into one channel and relayed, as in the present embodiment.

The bulk transfer system according to the present embodiment includes a bulk transfer device (the CP-IWF device 10 or the CO-IWF device 5).
0) ISDN termination unit 11 and AAL2 CPS processing unit 1
2, the functions of the ATM processing unit 13, the ATM line unit 14, etc.,
Other functions can be realized not only by hardware but also by loading a bulk transfer program, which is a computer program having each function, into a memory of the computer processing device. This bulk transfer program is stored on a magnetic disk, semiconductor memory, or other recording medium 90. Then, the functions described above are realized by being loaded from the recording medium into the computer processing device and controlling the operation of the computer processing device.

Although the present invention has been described with reference to the preferred embodiments and examples, the present invention is not necessarily limited to the above embodiments and examples, and various modifications may be made within the scope of the technical concept. Modifications can be made.

[0063]

As described above, according to the bulk transfer system of the present invention, when performing the bulk transfer of the ISDN, the B channel, which is the data channel of the ISDN, is used.
By merging into one AAL2 CPS packet while maintaining the temporal relative relationship, it is possible to realize bulk transfer that guarantees the temporal relative relationship between the B channels in the ISDN line.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an example of a network configuration according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating an example of a configuration of a CP-IWF device according to an embodiment of the present invention.

FIG. 3 is a flowchart illustrating a process of converting each ISDN channel data into an ATM cell and performing bulk transfer according to the embodiment of the present invention;

FIG. 4 is a flowchart illustrating a process of converting an ATM cell for bulk transfer of ISDN data into original channel data of ISDN according to the embodiment of the present invention.

FIG. 5 shows a CP-IWF device according to an embodiment of the present invention.
It is a figure which shows an example of the data format of the data transmitted / received between each ISDN terminal part and AAL2 CPS processing part.

FIG. 6 is a diagram illustrating a configuration of an AAL2 channel control table according to an embodiment of the present invention.

FIG. 7 is a diagram illustrating a configuration of an AAL2 CPS packet according to an embodiment of the present invention.

FIG. 8 is a diagram illustrating a process of generating an AAL2 CPS packet according to an embodiment of the present invention.

FIG. 9 shows a CP-IWF device according to an embodiment of the present invention.
FIG. 4 is a diagram illustrating an example of a data configuration of a packet transmitted from an AAL2 CPS processing unit to an ATM processing unit.

FIG. 10 is a diagram illustrating a configuration of a CPS-PDU packet according to an embodiment of the present invention.

FIG. 11 is a diagram showing an example of a data format of data transmitted from the ATM processing unit to the AAL2 CPS processing unit in the CP-IWF device according to one embodiment of the present invention.

FIG. 12 is a diagram illustrating a configuration of an AAL2 channel control table according to an embodiment of the present invention.

FIG. 13 shows an embodiment of the present invention, in which ATM to IS are used.
It is a figure for explaining data processing of DN direction.

[Explanation of symbols]

 10 CP-IWF device 11 ISDN termination unit 12 AAL2 CPS processing unit 13 ATM processing unit 14 ATM line unit 15-1 (for transmission processing) AAL2 channel control table 15-2 (for reception processing) AAL2 channel control table 16 ATM channel control Table 20 ISDN terminal adapter 30 Terminal 40 ATM network 50 CO-IWF device 60 ISDN exchange 90 Recording medium

Claims (18)

[Claims] 1. A bulk transfer device that merges data that is simultaneously bulk-transferred using a plurality of channels into one channel and relays the merged data, wherein the bulk transfer device is bulk-transferred using the plurality of channels. A data transfer unit that receives data, and sequentially merges the data based on a temporal relationship to generate a transmission packet. 2. The bulk transfer device according to claim 1, wherein the bulk transfer data is sequentially merged with each channel of the ISDN based on a temporal relationship to generate an ATM cell, and the ATM cell is relayed through one channel of an ATM line. The bulk transfer system according to claim 1, wherein: 3. The bulk transfer device merges the received data of each channel of the ISDN to obtain an AA
Means for generating an L2 CPS packet, and merging the generated AAL2 CPS packet to AAL2 CPS
The bulk transfer system according to claim 2, further comprising: means for generating a PDU; and means for generating the ATM cell by merging the generated AAL2 CPS-PDU into a payload portion of the ATM cell. 4. The bulk transfer device according to claim 1, further comprising: means for dividing a received ATM cell into AAL2 CPS packets; and means for dividing the divided AAL2 CPS packets into respective ISDN channel data. Item 4. A bulk transfer system according to Item 3. 5. The bulk transfer system according to claim 1, wherein the bulk transfer device is a CP-IWF device. 6. The bulk transfer system according to claim 1, wherein the bulk transfer device is a CO-IWF device. 7. The apparatus according to claim 7, further comprising: means for receiving bulk-transferred data simultaneously using a plurality of channels, and sequentially merging each of the data based on a temporal relative relationship to generate a transmission packet. A bulk transfer device, wherein data transferred in bulk using a channel is merged into one channel and relayed. 8. An ATM cell is generated by sequentially merging data bulk-transferred by each channel of the ISDN based on a temporal relationship to generate an ATM cell, and the ATM cell is relayed by one channel of an ATM line. 8. The bulk transfer device according to 7. 9. A means for generating an AAL2 CPS packet by merging the data of each channel of the received ISDN, and merging the generated AAL2 CPS packet to generate an AAL2 CPS packet.
9. The bulk transfer apparatus according to claim 8, further comprising: means for generating a PDU; and means for generating the ATM cell by merging the generated AAL2 CPS-PDU into a payload portion of the ATM cell. 10. The bulk according to claim 9, further comprising: means for dividing a received ATM cell into AAL2 CPS packets; and means for dividing the divided AAL2 CPS packets into respective ISDN channel data. Transfer device. 11. A method for receiving data that is bulk-transferred using a plurality of channels at the same time, and sequentially merging each of the data based on a temporal relationship to generate a transmission packet. 2. A bulk transfer method, wherein data transferred by bulk transfer is merged into one channel and relayed. 12. An ATM cell is generated by sequentially merging data bulk-transferred by each channel of the ISDN based on a temporal relative relationship, and is relayed by one channel of an ATM line. 12. The bulk transfer method according to item 11. 13. A method of generating an AAL2 CPS packet by merging data of each channel of the received ISDN, and merging the generated AAL2 CPS packet to generate an AAL2 CPS packet.
13. The bulk transfer method according to claim 12, comprising: generating a PDU; and merging the generated AAL2 CPS-PDU into a payload portion of an ATM cell to generate an ATM cell. 14. The bulk according to claim 13, further comprising: a step of dividing a received ATM cell into AAL2 CPS packets; and a step of dividing the divided AAL2 CPS packets into respective ISDN channel data. Transfer method. 15. Receiving data bulk-transferred using a plurality of channels at the same time, identifying a temporal relative relationship of each of the received data, and sequentially merging each of the data based on the temporal relative relationship. A bulk transfer program for causing a computer to execute a process of generating a transmission packet and merging data to be bulk-transferred using the plurality of channels into one channel and relaying the merged data. 16. An ATM cell is generated by sequentially merging data bulk-transferred through each channel of ISDN based on a temporal relationship to generate an ATM cell and executing a process of relaying the data through one channel of an ATM line. The bulk transfer program according to claim 15, wherein 17. A process for merging data of each received ISDN channel to generate an AAL2 CPS packet, and merging the generated AAL2 CPS packet to generate an AAL2 CPS packet.
17. The bulk transfer program according to claim 16, wherein:-a process for generating a PDU; and a process for merging the generated AAL2 CPS-PDU into a payload portion of an ATM cell to generate an ATM cell. 18. The method according to claim 17, wherein a process of dividing the received ATM cell into AAL2 CPS packets and a process of dividing the divided AAL2 CPS packets into respective ISDN channel data are executed. Bulk transfer program.