JP2001352359A - Data transmitter and data receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data transmitter and a data receiver by which improper charging of a channel can be reduced and a time for a user to be kept waiting prior to start of data transmission can be decreased. SOLUTION: Each channel interface section 2 makes dialing under the control of a control section 1 (step S101), the control section 1 discriminates whether or not a call is set up by each channel interface section 2 (step S102), when the control section 1 discriminates that a channel interface section 2 sets up a call ('Yes' in the step S102), a data distribution section 3 uses a channel whose call is set up to transmit one data stream through division without awaiting setup of all calls of channels through which dialing is made (step S103). The processing above is conducted every time a call is set up ('No' in step S104), and when all calls are set up ('Yes' in the step S104), transmission processing is conducted by using all channels whose calls are set up and when the transmission processing is finished, the transmission processing above is terminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a data distribution unit for dividing a data stream into a plurality of data and distributing the data to a plurality of lines, and a line interface unit corresponding to each of the plurality of lines (communication channels). A data transmission device that establishes a call through a plurality of lines to perform data transmission, a line interface unit corresponding to each of the plurality of lines, and a plurality of line interface units provided corresponding to the respective line interface units, each of which is connected to a corresponding line. It has a receiving buffer unit for receiving and storing a plurality of data, and a re-multiplexing unit for collecting data stored in each receiving buffer unit and reconstructing a stream. For data receivers that perform, especially as a high-rate communication channel by bundling multiple lines and synchronizing data between the communication channels And use, to a data transmitting apparatus and a data receiving apparatus for transmitting data.

[0002]

2. Description of the Related Art FIG.
Is a flowchart showing a transmission-side process in a conventional data transmitting device and a conventional data receiving device disclosed in Japanese Unexamined Patent Publication (Kokai) No. H10-15095. To explain, the calling side calls one line (communication channel) of the called side and connects one line (step S8).
00), the calling side and the called side exchange parameters necessary for high-speed communication using the line connected in step S800 (step S801), and the calling side sequentially calls the remaining lines on the called side with the telephone number received in S801. Connect necessary lines (steps S802, S803, S
804 "No"). If all the calls have been established ("Yes" in step S804), the transmitting side divides the transmission data into all of the set lines and transmits the divided data, and the receiving side maintains the state of establishing synchronization between the lines and transmits each data. The received data of the line is sequentially multiplexed and output (step S805).

[0003]

However, since the conventional data transmitting apparatus and data receiving apparatus are configured so as not to start data transmission until all calls on a plurality of lines (communication channels) are established, There is a problem in that a line fee is charged even during a period in which data is not transmitted, and at the same time, the user waits until the start of data.

[0004] Further, when a new line is added and the maximum delay difference of data communication between the lines changes, there is also a problem that the delay difference of data to be received changes and a user feels strange.

Accordingly, the present invention has been made to solve such a problem, and it is an object of the present invention to reduce unnecessary charge of a line charge and to reduce the time for which a user waits until the start of data. It is an object of the present invention to provide a data transmission device and a data reception device that can perform the above.

It is another object of the present invention to provide a data transmitting apparatus and a data receiving apparatus which can reduce a sense of discomfort to a user even when a new line is added and a delay difference between the lines changes. .

[0007]

According to the present invention, there is provided a data distribution unit for dividing a data stream into a plurality of data and distributing the data to a plurality of lines, and a line corresponding to each of the plurality of lines. An interface unit, and a data transmission device that establishes a call with the data reception device that is a communication partner and transmits data by establishing a call through the plurality of lines, wherein the data reception device is connected to the data reception device through the plurality of lines. When a call is made, the line corresponding to each of one or a plurality of lines set at that time is established each time a call is established without waiting for the establishment of the call on all the lines that made the call. It has a control part which controls the above-mentioned data distribution part so that the above-mentioned divided data may be transmitted via an interface part.

[0008] In particular, when the number of lines on which calls are established becomes equal to or greater than a preset number, the control unit transmits the divided data using a plurality of lines on which the number of calls is established. The data distribution unit is controlled to perform the above operation.

When the call is established within a preset time, the control unit transmits the divided data using one or a plurality of lines set at that time to transmit the divided data. It is characterized by controlling the distribution unit.

When a call is established within a preset time, the control unit transmits the divided data using one or a plurality of lines set at that time to transmit the divided data. While controlling the distribution unit, if the preset time has not elapsed, only when the number of lines where calls are established becomes equal to or more than the preset number, a plurality of The data distribution unit is controlled to transmit the divided data using a line.

Further, in the next invention, a line interface unit corresponding to each of the plurality of lines and a plurality of data are provided corresponding to each of the line interfaces and receive a plurality of data via the corresponding lines. A receiving buffer unit for storing, and a remultiplexing unit for reconstructing a stream by collecting data stored in each of the receiving buffer units,
A data receiving apparatus that establishes a call with the data transmitting apparatus to be a communication partner and receives data by establishing a call through the plurality of lines, and makes a call to the data transmitting apparatus through the plurality of lines, In the receiving buffer unit corresponding to the line in which the call has been established, a predetermined receiving buffer amount is set to accumulate the received data, while the receiving buffer unit corresponding to the line in which the call has been established from the second onward. By setting a receive buffer amount in consideration of a relative delay with respect to the first line and storing received data reception, the plurality of lines in which a call is established are eliminated so that a delay difference between the plurality of lines is eliminated. With synchronization between the lines, data is received using one or a plurality of lines set at that time each time a call is established, without waiting for the establishment of calls on all of the lines that have made the call. Control That the control unit, and having a.

In particular, the control unit absorbs a maximum delay amount assumed between the plurality of lines as a predetermined reception buffer amount for the reception buffer unit corresponding to the line on which the call is first established. Setting a reception buffer amount.

When a predetermined number of lines are set, the control unit deletes the stored data from the reception buffer storing the minimum data amount among the plurality of reception buffer units. For the other receiving buffer units, the same amount of data as that stored in the receiving buffer storing the minimum data amount is deleted so that the amount of delay between the plurality of lines is reduced. Synchronize.

Further, in the next invention, a line interface unit corresponding to each of the plurality of lines, and a plurality of data are provided corresponding to each of the line interfaces and receive a plurality of data via the corresponding lines. A receiving buffer unit for storing, and a remultiplexing unit for reconstructing a stream by collecting data stored in each of the receiving buffer units,
A data receiving device for establishing a call with the plurality of lines and receiving data with the data transmitting device as a communication partner, wherein the plurality of lines establish a call by the plurality of lines and establish the call. When disconnecting some of the plurality of lines during communication via the, data reception is performed using all the lines on which the call is established until all the lines to be disconnected are disconnected. On the other hand, if all the lines to be disconnected are disconnected, the storage buffer corresponding to the remaining line used at that time stores the minimum amount of data from the reception buffer storing the minimum amount of data. The amount of delay between the remaining lines is deleted by deleting data and deleting the same amount of data stored in the reception buffer that has stored the minimum data amount for the other reception buffer units. Is small Taking Kunar for synchronization control unit for controlling so as to receive the data by using the remaining circuits,
It is characterized by having.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a configuration diagram showing a configuration of a data transmission device and a data reception device according to the present invention. In the figure, A is a data transmitting device according to the first embodiment of the present invention, B is a data receiving device, and C is a network connecting the data transmitting device A and the data receiving device B. 1 is a control unit for controlling the entire data transmitting apparatus A, 2-1 to 2-N are line interface units connected to a plurality of corresponding lines (here, N lines for convenience), A data distribution unit 3 distributes one data stream to a plurality of lines.

Reference numerals 4-1 to 4-N denote reception buffer units for accumulating data received from the corresponding lines for each line, and reference numeral 5 denotes data output from the reception buffer units 4-1 to 4-N. A remultiplexing unit for multiplexing into one data stream, a control unit 6 for controlling the entire data receiving apparatus B, and a plurality of corresponding 7-1 to 7-N (here, N lines for convenience). ) Is a line interface unit connected to the line. The configuration shown in FIG. 1 is the same in Embodiments 2 to 7 described later.

Next, the operation will be described. FIG. 2 is a flowchart illustrating processing on the transmitting side in the data transmitting apparatus according to the first embodiment. In the first embodiment, a case where a call is made from the transmitting side will be described as an example. In the data transmitting apparatus A, first, each of the line interface units 2-1 to 2-N makes a call to the corresponding line under the control of the control unit 1 (step S101). Each of the units 2-1 to 2-N determines whether a call can be established for the corresponding line (step S1).
02).

Then, a certain line interface unit 2-1
When it is determined that a call has been established for each of the corresponding lines (step 102 "Yes"), the control unit 1 controls the data distribution unit 3 to use the line on which the current call is established. Then, the data distribution unit 3 divides and transmits one data stream (step S103).

The above steps S102 and S103 are performed each time a call is established (step 104 "N
o "), if all calls have been established (step S1)
04 "Yes"), a data transmission process is performed with the data receiving device B via the network C using all the lines on which the call has been established, and when this data transmission process is completed,
The above data transmission processing is terminated.

For this reason, in the data transmitting apparatus A according to the first embodiment, under the control of the control unit 1, even before all the calls are established, each time a call is established, the call is newly newly established. Data communication is performed by adding lines and bundling lines for which calls have been established.

Therefore, according to the data transmitting apparatus A of the first embodiment, the data communication is performed by bundling the lines each time a call is successively established. Communication can be started.

Embodiment 2 FIG . Next, a data transmission device according to a second embodiment of the present invention will be described. The configuration of the data transmitting apparatus according to the second embodiment is the same as that of the first embodiment shown in FIG.
Therefore, the operation will be described with reference to the configuration shown in FIG.

FIG. 3 shows a data transmitting apparatus A according to the second embodiment.
Is shown by a flowchart.
In the data transmitting apparatus A, first, as in the first embodiment, the line interface unit 2-2 is controlled by the control unit 1.
1 to 2-N make a call to the corresponding line (step S200), and then the control unit 1 sends a call to the line to which each of the line interface units 2-1 to 2-N respectively corresponds. It is determined whether or not the connection has been established (step S
201). Here, when the line interface units 2-1 to 2-N can establish a call to the corresponding line (step S201 “Yes”), the control unit 1 further pre-determines the call in the second embodiment. It is determined whether or not the number of lines equal to or greater than the set number is established (step S202).
If it is determined that the specified number of lines or more have not been established (step S202 “No”), then it is determined whether all the calls have been established (step S205).

If not all the calls have been established ("No" at step S205), the control unit 1 returns to the processing at step S201, and performs the processing at and after step S201. 2-1 to 2-N
If a call can be established for each of the corresponding lines (step S201 "Yes"), processing such as determining whether a predetermined number of lines or more have been established (step S202) is performed.

On the other hand, if all the calls have been established ("Yes" in step S205), the control unit 1 issues an instruction to the data distribution unit 3 to perform data transmission on the line on which the call has been established, and performs control. (Step S206), transmission processing is performed using all the lines on which the call has been established, and the above transmission processing is terminated when the transmission processing is completed. As a result, in this case, data transmission is performed in a state where less than the prescribed number of calls have been established.

On the other hand, in the determination processing of step S202, when the control unit 1 determines that the number of lines equal to or more than the specified number has been established (step S202 "Yes"), the control unit 1 sets the line in which the number of calls equal to or more than the specified number has been established. Is controlled so that the data distribution unit 3 divides and transmits the data (step S20).
3) Subsequently, it is determined whether or not all the calls have been established (step S204). If not all the calls have been established (step S204 "No"), the process returns to step S201, and the process returns to step S201. While the subsequent processing is performed as described above, when all the calls have been established (step S
204 "Yes"), data transmission processing is performed with the data receiving apparatus B via the network C using all the lines on which the call has been established, and when the data transmission processing is completed, the above data transmission processing is performed. To end.

For this reason, in the data transmitting apparatus A according to the second embodiment, even before all the calls have been established, the calls are transmitted when a predetermined number of calls or more are established. Data communication will be performed by bundling the established lines.

Therefore, according to the data transmitting apparatus A of the second embodiment, the data communication is performed by bundling the lines each time a predetermined number of calls are established, so that the calls of all the lines are established. Data communication can be started before the call is established, and at the stage when a specified number of calls have been established.

Embodiment 3 Next, a data transmission device according to a third embodiment of the present invention will be described. Since the configuration of the data transmitting apparatus according to the third embodiment is the same as that of the data transmitting apparatus according to the first embodiment shown in FIG.
The operation will be described with reference to the configuration shown in FIG.

FIG. 4 shows a data transmitting apparatus A according to the third embodiment.
Is shown by a flowchart.

In the data transmitting apparatus A, first, under the control of the control unit 1, the line interface units 2-1 to 2-N make outgoing calls to the corresponding lines (step S3).
00), in the third embodiment, subsequently, the control unit 1 waits for a preset specified time to elapse (step S301).
“Yes”), it is determined whether or not a line is newly established (step S302). If the line is newly established within the specified time (“Yes” in step S302).
s "), and controls the data distribution unit 3 to divide and transmit the data to the line on which the call is established (step S30).
3).

Finally, the control unit 1 determines whether all the calls have been established (step S304). If all the calls have not been established (step 304 "No"), the control unit 1 proceeds to step S301. Returning to the processing, the processing after step S301 is performed, and when all the calls are established (“Yes” in step S304), the communication with the data receiving apparatus C is performed via the network C using all the lines on which the calls are established. Then, the data transmission processing is performed, and when the data transmission processing is completed, the above data transmission processing is terminated.

Therefore, in the data transmitting apparatus A according to the third embodiment, even before all the calls have been established, the lines for which a new call has been established are bundled within a predetermined time. Data communication will be performed.

Therefore, according to the data transmitting apparatus A of the third embodiment, data communication is performed by bundling the lines on which the calls are established within a preset time, so that the calls on all the lines are transmitted. Data communication can be started before establishment.

Embodiment 4 FIG . Next, a data transmission device according to a fourth embodiment of the present invention will be described. Note that, as described above, the configuration of the data transmission device of the fourth embodiment is the same as that of the data transmission device of the first embodiment shown in FIG.
The operation will be described with reference to the configuration shown in FIG.

FIG. 5 shows a data transmitting apparatus A according to the fourth embodiment.
Is shown by a flowchart.

In the data transmitting apparatus A, first, under the control of the control unit 1, the line interface units 2-1 to 2-N make outgoing calls to the corresponding lines (step S40).
0), and subsequently, the control unit 1 determines whether or not a line has been newly established within a predetermined time set in advance (Step S).
401, S402).

Here, when a new line is established within the specified time ("Yes" in step S401, S402)
"Yes"), the control unit 1 controls the data distribution unit 3 to divide and transmit the data to the line on which the call is established, as in the case of the third embodiment (step S40).
3) Subsequently, it is determined whether or not all the calls have been established (step S404). If not all the calls have been established (step 404 "No"), the process returns to step S401 and the process returns to step S401. On the other hand, if all the calls have been established (step S404 "Y").
es "), a data transmission process is performed with the data receiving device B via the network C using all the lines on which the call has been established, and the above data transmission process ends when the data transmission process ends. To do.

On the other hand, when the time exceeds the specified time (“No” in step S401, “Ye” in S405)
s "), the control unit 1 subsequently determines whether or not a specified number of calls have been established (step S406), and if the specified number of calls have been established (step S406" Ye ").
s "), and controls the data distribution unit 3 to divide and transmit the data to the line on which the specified number of calls have been established (step S).
407) Then, it is determined whether or not all the calls have been established (step S408). If not all the calls have been established (step 408 "No"), the process returns to the step S401, and the process returns to the step S401. On the other hand, if all the calls are established (step S40)
8 "Yes"), the transmission process is performed using all the lines on which the call is established, and the above transmission process is terminated when the transmission process is completed.

Therefore, in the data transmitting apparatus A according to the fourth embodiment, even before all the calls have been established, the line for which a new call has been established within a predetermined time has not been established. Data communication is performed by bundling the lines, and even if the specified time has not been exceeded, if the specified number of calls have been established, the data communication is performed by bundling the lines with the specified number of calls established. Will be done.

Therefore, according to the data transmitting apparatus A of the fourth embodiment, the data communication is performed by bundling the lines on which the calls have been established every predetermined number or within a predetermined time. Data communication can be started before the call of the line is established.

Embodiment 5 FIG . Next, a data receiving apparatus according to a fifth embodiment of the present invention will be described. Embodiment 5
Is the same as the data receiving apparatus B shown in FIG. 1 as described above, and therefore the operation will be described with reference to the configuration shown in FIG.

FIG. 6 shows a data receiving apparatus B according to the fifth embodiment.
Is shown by a flowchart.
In the fifth embodiment, unlike the first to fourth embodiments, a case where a call is originated from the receiving side will be described as an example.

In the data receiving apparatus B, first, the line interface units 7-1 to 7-N make outgoing calls to the corresponding lines under the control of the control unit 6 (step S5).
00), it is determined whether a call for the first line has been established (step S501).

Then, the control unit 6 of the data receiving device B
If a call for the first line has been established (step S501)
“Yes”), the receiving buffer units 4-1 to 4-N corresponding to the lines on which the first call has been established are set with the receiving buffer amounts that absorb the maximum delay amount assumed between the lines ( In step S502, data transmission is performed (step S502).
503). As a result, the data received by the corresponding line interface units 7-1 to 7-N via the line on which the first call has been established is temporarily stored in the corresponding reception buffer units 4-1 to 4-4.
After accumulating up to the set reception buffer amount at -N, the data is multiplexed by the remultiplexing unit 5.

Next, the control unit 6 of the data receiving apparatus B determines whether or not the call of the second and subsequent lines has been established (step S504), and the newly established second and subsequent lines. If a call is established on the line (step S504)
“Yes”), for the newly established second and subsequent lines, the reception buffer amount is set in consideration of the relative delay difference with the first line (step S505).

That is, when a call is established using the second and subsequent lines, the control unit 6 sets the delay amount of the second line to the first line.
When the delay amount of the second line is smaller than the first line, the control is performed so that the delay amount of the second line is increased by the amount corresponding to the relative delay difference from the first line. If the delay amount is larger than the delay amount of the communication channel, control is performed such that a data amount smaller by an amount corresponding to the relative delay difference is accumulated in the corresponding reception buffer unit, and the second and subsequent calls for which the call has been established up to the present. Bundling the line and the first line,
In addition, data reception is performed in a state where the reception buffer amounts of the reception buffer units 4-1 to 4-N are not changed (step S506).

As a result, even before all the calls have been established, the lines for which the calls have been established sequentially are bundled and data reception is performed. Even in this case, the amount of the received buffer to be stored is not changed. The data delay amount becomes constant.

Steps S504 to S504
The processing up to 506 is repeated until all the calls are established ("No" in step 507). If all the calls are established ("Yes" in step S507), the network is established using all the lines on which the calls are established. A data transmission process is performed with the data transmission device A via C, and the data reception process is terminated when the data transmission process is completed.

Therefore, according to the data receiving apparatus B of the fifth embodiment, the amount of the receiving buffer that absorbs the maximum amount of delay assumed between the lines is set for each of the receiving buffer units 4-1 to 4-N. As a result, even if calls are established sequentially and a new line is added and bundled, the amount of received buffer to be stored is not changed, and the amount of delay of data becomes constant.
The user's discomfort due to the change in the data delay amount can be reduced.

Embodiment 6 FIG . Next, a data receiving apparatus according to a sixth embodiment of the present invention will be described. Embodiment 6
Is the same as the data receiving apparatus B shown in FIG. 1 as described above, and therefore the operation will be described with reference to the configuration shown in FIG.

FIG. 7 shows a data receiving apparatus B according to the sixth embodiment.
Is shown by a flowchart.

In the data receiving apparatus B, first, the line interface units 7-1 to 7-N make outgoing calls to the corresponding lines under the control of the control unit 6 (step S6).
00), it is determined whether or not a call for the first line has been established (step S601).

Then, the control unit 6 of the data receiving apparatus B
If a call for the first line has been established (step S601)
“Yes”), the receiving buffer units 4-1 to 4-N corresponding to the lines on which the first call has been established are set with the receiving buffer amounts that absorb the maximum delay amount assumed between the lines ( In step S602, data transmission is performed (step S602).
603). As a result, the data received by the corresponding line interface units 7-1 to 7-N via the line on which the first call has been established is temporarily stored in the corresponding reception buffer units 4-1 to 4-4.
After accumulating up to the set reception buffer amount at -N, the data is multiplexed by the remultiplexing unit 5.

Next, the control section 6 of the data receiving apparatus B determines whether or not a call for the second and subsequent lines has been established (step S604). The operation up to this point is the same as the processing of steps S500 to S503 in the fifth embodiment shown in FIG.

Next, in the sixth embodiment, when the control unit 6 determines that a call has been established on the second and subsequent lines (step S604 “Yes”), the control unit 6 continues to determine the call in advance. It is determined whether or not the predetermined or all calls have been established (step S605). If it is determined that the predetermined or all calls have not been established (step S605 “N”).
o ″), Steps S505 and 506 of the fifth embodiment.
As in the case of (1), the reception buffer amount is set for the newly established second and subsequent lines in consideration of the relative delay difference between the first and second communication channels (step S608), and the call is The established second and subsequent lines are bundled with the line on which the first call has been established, and data is received (step S6).
09), the process returns to step S604.

On the other hand, when it is determined whether predetermined or all calls have been established (step S605), when it is determined that all calls have been established,
If the predetermined or last line has been established (step S6
05 "Yes"), the same data amount as the data amount stored in the reception buffer storing the minimum data amount, that is, the same data amount as the data amount stored in the reception buffer of the line with the minimum delay. The data is deleted from all the reception buffer units 4-1 to 4-N (step S60).
6) All the lines on which the call has been established are bundled, and data transmission processing is performed with the data transmitting apparatus A via the network C using all the lines on which the call has been established (step S60).
7) When the data transmission process is completed, the above data reception process is terminated.

For this reason, even if the lines on which the calls have been established are sequentially bundled and data transmission is performed before all the calls are established, the data delay is constant and the data reception is performed while the data delay is constant. When the call has been established, after the data of the same data amount as the data amount stored in the reception buffer of the line with the shortest delay is deleted from all the reception buffer units 4-1 to 4-N, The data reception is carried out by bundling all the lines in which is established, so that it is possible to reduce the delay amount as compared with the case of the fifth embodiment while maintaining the synchronization between the channels.

Therefore, according to the sixth embodiment, the receiving buffer units 4-1 to 4-N are set with the receiving buffer amount that absorbs the maximum delay amount assumed between the lines, so that all calls can be transmitted. When the connection is established, that is, only when adding the line to which the call was established last, the setting is changed to the minimum reception buffer amount that absorbs the delay amount between the lines, so that the data delay amount is minimized. In addition, the user's discomfort due to the change in the data delay amount can be reduced.

Embodiment 7 FIG . Next, a data receiving apparatus according to a seventh embodiment of the present invention will be described. The data receiving apparatus according to the seventh embodiment disconnects the call from the receiving side, deletes some of the bundled lines performing data transmission, and performs data transmission using the remaining lines. It is characterized by continuing. Since the data receiving device of the seventh embodiment is the same as the data receiving device B shown in FIG. 1 as described above, the operation will be described with reference to the configuration shown in FIG.

FIG. 8 shows a data receiving apparatus B according to the seventh embodiment.
Is shown by a flowchart. In the seventh embodiment, first, it is assumed that data transmission is performed using a plurality of lines, and the control unit 6 sets the line interface units 7 corresponding to the plurality of lines performing the data transmission.
Of the line interface units 7-1 to 7-N to be disconnected, and disconnects the lines to some of the line interface units 7-1 to 7-N. Processing is performed (step S700), and subsequently, control unit 6 determines whether or not the line has been disconnected (step S70).
1).

If the control unit 6 determines that the line has been disconnected ("Yes" in step S701), the control unit 6 further determines whether all the lines to be disconnected have been disconnected (step S702). When it is determined that all the lines to be disconnected have not been disconnected (step S70)
2 “No”), the lines on which the calls are established are bundled, and data is received (step S705).
Return to the processing of. In this case, the control unit 6 deletes the line that has detected the disconnection from the bundled lines, but the reception buffer units 4-1 to 4-1 correspond to the remaining one or bundle lines that have not disconnected. Regarding 4-N, the amount of reception buffer for absorbing the delay difference between the lines set in the reception buffer units 4-1 to 4-N is not changed.

On the other hand, when it is determined that all the lines to be disconnected have been disconnected, that is, when the last line of the predetermined lines to be disconnected has been disconnected (step S
702 "Yes"), the control unit 6 assigns the same data amount stored in the reception buffer storing the minimum data amount to all of the remaining lines that are not disconnected. Receiving buffer units 4-1 to 4-N
(Step S703), and data transmission is performed by the remaining line whose reception buffer amount has been reduced (step S704).

For this reason, the call is disconnected from the receiving side, some of the bundled lines for data transmission are deleted, and data transmission is performed using the remaining lines for which the call is established. Even if you continue, while keeping the synchronization between the lines,
Data transmission can be performed with a reduced amount of delay.

Therefore, according to the data receiving apparatus B of the seventh embodiment, if the last line to be disconnected is deleted from among the bundled lines that are performing data transmission, the remaining call remains established. Since the receive buffer amount of the line with the smallest delay among the receive buffer units corresponding to the line of the line, that is, the minimum receive buffer amount that absorbs the delay amount between the remaining lines is deleted, The user's discomfort due to the change in the delay amount can be reduced.

.

As described above, according to the present invention,
Even before all calls are established, each time a call is established, data communication is performed by adding newly established lines sequentially, so data communication is performed before calls on all lines are established. Can be started.

As a result, it is possible to reduce unnecessary charge of the line charge and reduce the time for which the user waits until the start of data.

Further, even when a new line is added and the delay difference between the lines changes, it is possible to reduce a sense of discomfort to the user.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a configuration of a data transmission device and a data reception device of the present invention.

FIG. 2 is a flowchart showing a data transmission process in the data transmission device A according to the first embodiment.

FIG. 3 is a flowchart showing data transmission processing in a data transmission device A according to the second embodiment.

FIG. 4 is a flowchart showing a data transmission process in a data transmission device A according to the third embodiment.

FIG. 5 is a flowchart showing a data transmission process in a data transmission device A according to the fourth embodiment.

FIG. 6 is a flowchart showing processing on the receiving side in a data receiving apparatus B according to the fifth embodiment.

FIG. 7 is a flowchart showing processing on the receiving side in a data receiving apparatus B according to the sixth embodiment.

FIG. 8 is a flowchart showing processing on the receiving side in a data receiving apparatus B according to the seventh embodiment.

FIG. 9 is a flowchart showing a data transmission process in a conventional data transmission device.

[Explanation of symbols]

A data transmission device, B data reception device, C network, 1 control unit, 2-1 to 2-N line interface unit, 3 data distribution unit, 4-1 to 4-N reception buffer unit, 5 remultiplexing unit, 6 Control unit, 7-1 to 7-N Line interface unit.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Susumu Oka 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Morio Yoshimoto 2-3-2 Marunouchi 3-chome, Chiyoda-ku, Tokyo F term in Ryo Denki Co., Ltd. (reference) 5K030 GA02 GA20 HA02 HC01 JA01 JL04 KA03 KA13 LB01 LE06 5K034 AA03 AA17 EE09 FF02 HH01 HH02 JJ11 LL01 MM25

Claims (8)

[Claims] A data distribution unit for dividing a data stream into a plurality of data and distributing the data to a plurality of lines; and a line interface unit corresponding to each of the plurality of lines, and A data transmission device that establishes a call through the plurality of lines and transmits data, and, when a call is made to the data reception device through the plurality of lines, the line that made the call. Instead of waiting for all calls to be established, each time a call is established,
Alternatively, the data transmitting apparatus includes a control unit that controls the data distribution unit to transmit the divided data via the line interface units corresponding to each of a plurality of lines. 2. The data transmitting apparatus according to claim 1, wherein the control unit is configured to, when the number of lines on which the calls are established is equal to or greater than a preset number, set a plurality of calls for which the number is equal to or greater than the preset number. A data transmission device, wherein the data distribution unit is controlled to transmit the divided data using a line. 3. The data transmission device according to claim 1, wherein the control unit uses one or a plurality of lines set at that time when a call is established within a preset time. A data transmission device, wherein the data distribution unit is controlled to transmit the divided data. 4. The data transmitting apparatus according to claim 1, wherein the control unit uses one or a plurality of lines set at that time when a call is established within a preset time. While controlling the data distribution unit to transmit the divided data, if the preset time has not elapsed, only when the number of lines in which the call has been established is equal to or more than the preset number, the A data transmission device, comprising: controlling the data distribution unit to transmit the divided data using a plurality of lines on which a number of calls are set. 5. A line interface unit corresponding to each of a plurality of lines, and a reception buffer unit provided corresponding to each of the line interfaces and receiving and storing a plurality of data via the corresponding lines. And a remultiplexing unit for reconstructing a stream by collecting data stored in each of the reception buffer units, and establishing a call with the data transmission device to be a communication partner by using the plurality of lines to transmit data. A data receiving apparatus for receiving data, wherein a call is made to the data transmitting apparatus via the plurality of lines, and a predetermined receiving buffer is provided for the receiving buffer unit corresponding to the line on which the call is first established. While the amount is set and the received data is stored, the first and second reception buffers corresponding to the lines on which the second and subsequent calls are established are stored in the first buffer.
By setting a receive buffer amount in consideration of a relative delay with respect to the line and accumulating received data reception, synchronization between the plurality of lines is established so that a delay difference between the plurality of lines with which a call is established is eliminated. Without waiting for the establishment of a call on all of the lines that made the call, a control unit that controls data reception using one or a plurality of lines set at that time each time a call is established. A data receiving device comprising: 6. The data receiving apparatus according to claim 5, wherein the control unit is configured to first control the reception buffer unit corresponding to the line on which the call is established as the predetermined reception buffer amount. A data receiving device for setting a receiving buffer amount for absorbing a maximum delay amount assumed between lines. 7. The data receiving device according to claim 5, wherein the control unit is configured to, when a predetermined number of lines are set, store the smallest data among the plurality of reception buffer units. The stored data is deleted from the receiving buffer storing the amount, and the same data amount as the data amount stored in the receiving buffer storing the minimum data amount is transmitted to the other receiving buffer units. A data receiving device for performing synchronization so as to reduce a delay amount between the plurality of lines by deleting the data. 8. A line interface unit corresponding to each of a plurality of lines, and a reception buffer unit provided corresponding to each of the line interfaces and receiving and accumulating a plurality of data via the corresponding lines. And a remultiplexing unit for reconstructing a stream by collecting data stored in each of the reception buffer units, and establishing a call with the data transmission device to be a communication partner by using the plurality of lines to transmit data. A data receiving apparatus for receiving data, wherein when a call is established through the plurality of lines and communication is performed through the plurality of lines where the call is established, a part of the plurality of lines is disconnected. In this case, data is received using all the lines on which the call is established until all the lines to be disconnected are disconnected, while if all the lines to be disconnected are disconnected, the data is used at that time. Of the received buffer unit corresponding to the remaining circuits that are, remove the accumulated data from the receive buffer that accumulates the least amount of data,
For the other receiving buffer units, the same amount of data as that stored in the receiving buffer storing the minimum amount of data is deleted so that the remaining lines are synchronized so that the amount of delay is reduced. And a control unit for controlling the reception of data using the remaining lines.