JP2015165625A - Bulk transmission device, bulk transmission system and bulk transmission method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bulk transmission device capable of correctly restoring data while easily eliminating influence of erroneous connection even when an erroneous connection is made between a line interface and a line.SOLUTION: The bulk transmission device includes: a terminal interface which performs data input/output with an external terminal; plural line interfaces for performing data transmission and reception with plural lines; transmission data division control means that divides an input data received by the terminal interface and generates a frame of a predetermined format to transmit the same to the line interfaces; transmission source interface identification means that identifies the line interface of a transmission source of a frame which the line interface has received from the line; and divided data combining means that takes out divided data from the frame and combines plural divided data in the order based on the identification result by the transmission source interface identification means.

Description

  The present invention relates to a bulk transmission apparatus, a bulk transmission system, and a bulk transmission method.

  The bulk transmission method is a technique for speeding up transmission by dividing data to be transmitted and transmitting the divided data simultaneously using a plurality of lines. Since this operation is the reverse of multiplexing that has become popular in recent years, it is also called demultiplexing. According to bulk transmission, an arbitrary transmission rate can be obtained by increasing or decreasing the number of bundled lines. The operation of each part in bulk transmission is as follows. First, the data input to the transmission side is divided into divided data having a predetermined length. Next, the data is distributed to a plurality of line interfaces in a predetermined order and transmitted to the lines. On the receiving side, data is recombined according to the same predetermined order as that on the transmitting side. Generally, an identification number is assigned to a line interface, and a line interface having the same identification number may be connected to one line on the transmission side and the reception side. Then, on the receiving side, the original data is restored by combining the divided data in the same order of the identification numbers as the transmitting side.

  The connection between the line interface and the line of the bulk transmission apparatus that performs such bulk transmission is performed by physically connecting with a cable or the like. For this reason, when the number of lines used increases, there is a problem that erroneous connection is likely to occur. Specifically, it is a case where line interfaces having different identification numbers are connected to one line. If there is an incorrect connection, the divided data will not be combined in the correct order, so that the data cannot be restored.

  For this reason, various methods for detecting and repairing the erroneous connection as described above have been proposed. For example, Patent Document 1 discloses a method for performing a connection test by assigning an identifier to each of a transmission interface and a reception interface. The procedure of this method is as follows. First, a frame is generated by adding the identification number of the transmission line interface to the test data. Next, this frame is transmitted to the line. On the receiving side, the identification number of the received line interface is further added to the frame received from the line and returned to the transmission source. On the transmission side, two identification numbers added to the received frame are extracted and compared with connection information registered in advance. If the two match, the connection is correct, and if the two do not match, the connection is incorrect. The operator then corrects the connection. By performing the same test on a plurality of lines and correcting erroneous connections in sequence, the divided data can be combined in the correct order and the data can be restored.

JP 2010-171694 A

  However, in the technique of Patent Document 1, the operator has to correct the connection after detecting the erroneous connection. In addition, it took time and effort to make corrections by sequentially testing and correcting connections on multiple lines.

  The present invention has been made in view of the above problems, and in the event of an erroneous connection between a line interface and a line, a bulk transmission apparatus that automatically corrects the coupling order and correctly restores data is provided. It is intended to provide.

  To achieve the above object, a bulk transmission apparatus according to the present invention includes a terminal interface for inputting / outputting data to / from an external terminal, a plurality of line interfaces for transmitting / receiving data to / from a plurality of lines, Transmission data division control means for dividing the input data received by the terminal interface to generate a frame of a predetermined format and transmitting it to the line interface, and transmission for identifying the transmission source line interface of the frame received from the line by the line interface Original interface identifying means, and divided data combining means for extracting the divided data from the frame and combining the divided data in an order based on the identification result of the transmission source interface identifying means.

  An advantage of the present invention is that a bulk transmission apparatus can be obtained that can easily restore data by removing the influence of erroneous connection when there is an erroneous connection between a line interface and a line.

It is a block diagram which shows 1st Embodiment. It is a block diagram which shows the bulk transmission system of 2nd Embodiment. It is a schematic diagram which shows the flame | frame structure of 2nd Embodiment. It is a schematic diagram which shows the data division method of 2nd Embodiment. It is a block diagram which shows the bulk transmission system with a misconnection. It is a schematic diagram which shows frame transmission when there exists a misconnection. It is a schematic diagram which shows the data combination method when there exists a misconnection. It is a flowchart which shows operation | movement of 2nd Embodiment. It is a block diagram which shows 3rd Embodiment. It is a flowchart which shows operation | movement of 3rd Embodiment. It is a block diagram which shows 4th Embodiment. It is a block diagram which shows 5th Embodiment. It is a block diagram which shows the bulk transmission system of 5th Embodiment. It is a sequence diagram which shows operation | movement of 5th Embodiment.

Next, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
The bulk transmission apparatus according to the present embodiment includes a terminal interface 1 for inputting / outputting data to / from an external terminal, a plurality of line interfaces IF for transmitting / receiving data to / from a plurality of lines, and transmission to the lines The transmission data division control means 2 that divides input data received from the terminal interface 1 to generate a plurality of frames of a predetermined format and distributes and transmits the frames to a plurality of line interface IFs. A transmission source interface identifying means for identifying a transmission source line interface of a frame received from the line L, a divided data combining means for taking out the divided data from the frame and combining them in a predetermined order, and a transmission source interface identifying means A result of controlling the predetermined order based on the identification result. It has a sequence control means.

With the above configuration, even if there is a misconnection between the line interface and the line, it is possible to identify the transmission side interface, correct the combination order based on the identification result, and combine the data in the correct order. it can.
(Second Embodiment)
FIG. 2 is a block diagram showing a bulk transmission system including two bulk transmission apparatuses 100 and a dedicated line 200 according to the present embodiment. The line interface IFs of the bulk transmission apparatuses 100a and 100b are connected to the dedicated line 200, respectively. The dedicated line 200 has a plurality of lines L (L1, L2,... Ln).

  The two bulk transmission apparatuses 100 are connected by connecting corresponding line interface IFs to the same line. For the sake of explanation, here, it is assumed that an identification number is attached to the line interface, and the line interface having the same identification number of the bulk transmission apparatuses 100a and 100b is promised to be connected to both ends of one line. For example, the line interface IFa1, the line L1, and the line interface IFb1 are connected to be IFa1-L1-IFb1. This correspondence is registered in advance in the joining order control means 5.

  If the connection order of IFa and IFb is arranged in this way, the original data can be restored by combining the divided data in the order of the line interface identification numbers on the receiving side. Here, for the sake of simplicity, the same identification number line interfaces are connected to each other, but it goes without saying that the identification number assignment method is not limited to this and is arbitrary.

  FIG. 3 is a schematic diagram showing a frame format when the line L is transmitted. The frame F includes a header H, a line interface identification number ID-IF, and divided data DD. In this embodiment, an interface identification number ID-IF is added to the header H of the divided data. In the present embodiment, when there is an error in the coupling order, that is, when there is an erroneous connection, the coupling order is corrected using this identification number.

  FIG. 4 is a schematic diagram showing an example of a method for generating the frame F from the input data 5. Here, it is assumed that the input data 5 is composed of elements 00, 11, 22,. This is divided into, for example, two unit lengths to form a frame F. For example, as shown in FIG. 4, the frame F1 transmitted from the line interface IFa1 to the line L1 includes a header H1, an ID-IF1, and divided data [00, 11]. Similarly, frames F2, F3,... Are generated and transmitted to the lines L2, L3,.

  Incidentally, as described above, the connection between the line interface IF and the line L needs to be performed according to a predetermined rule. However, in the connection work, there may occur a case where an erroneous connection that is out of the rule is made. FIG. 5 is a block diagram illustrating an example of a bulk transmission system having such an erroneous connection. Originally, IFa1-L1-IFb1 and IFa2-L2-IFb2 must be connected to IFa1-L2-IFb2 and IFa2-L1-IFb1.

  FIG. 6 is a schematic diagram showing a state of frame transmission in the erroneous connection. Due to an erroneous connection, data [00, 11] that should be received by the line interface IFb1 is received by IFb2, and data [22, 33] that should be received by IFb2 is received by IFb1, respectively. Note that the header H is omitted.

  If data is combined from this received data in a predetermined order (here, the order of IFb identification numbers), the data cannot be combined in the correct order as shown in FIG. However, in this embodiment, the transmission source line interface IFa is identified by the transmission line interface identification unit 3 using the identification number ID-IF, and the coupling order control unit 5 determines the coupling order based on the identification number ID-IFa. Rearrange correctly. Therefore, as shown in FIG. 7B, the divided data DD can be combined in the correct order to restore the original data.

  FIG. 8 is a flowchart showing the above operation. First, the bulk transmission apparatus 100 on the receiving side receives the frame F. Next, the transmission source line interface identification means 3 identifies the line interface identification number ID-IF added to the frame F (S101). Next, the correspondence between the identification result and the line interface identification numbers ID-IFa and ID-IFb registered in the coupling order control means 5 is compared to check whether there is a mismatch (S102). If there is no mismatch, the divided data is extracted from the frames and combined without changing the combining order (S102_NO) (S104). If there is a mismatch (S102_YES), the combination order control means 5 corrects the order of combining the divided data DD based on the identification result (S103). Next, the divided data DD is extracted from the frame F and combined in the corrected order (S104). In this way, data can be combined in the correct order.

  As described above, according to the present embodiment, even if there is an erroneous connection between the line interface IF and the line L, the order of combining the divided data is automatically corrected and the data is correctly restored. can do.

It should be noted that the coupling order may be corrected only once for the first time if the connection is not changed. For this reason, it is possible to add the identification number ID-IF to the frame only at the first connection and perform the coupling order correction operation, and to omit the ID-IF addition, identification number identification, and coupling order correction operations for the second and subsequent times. It is.
(Third embodiment)
FIG. 9 is a block diagram showing a third embodiment of the present invention. In addition to the configuration of the second embodiment, the bulk transmission apparatus 100 according to the present embodiment is provided with a combined data inspection unit 6 subsequent to the data combining unit.

  In the second embodiment, it is necessary to register the correspondence relationship between the transmission source line interface and the reception side line interface in advance, but in this embodiment, the registration is not necessary. However, on the transmission side, there is a rule that the identification number ID-IF is assigned to the divided data DD in ascending order from the top of the data. That is, if the divided data are combined in the order of the identification numbers, the correct order is obtained.

  FIG. 10 is a flowchart showing the operation of the present embodiment. When the frame F is received, the transmission source interface identification unit 3 first identifies the transmission source ID-IF (S201). Next, the result is transmitted to the join order control means 5, and the join order control means 5 holds this (S202). Next, the divided data combining means 4 extracts the divided data DD from the frame F and combines them in the order determined for the received line interface to generate combined data (S203). Next, the combined data inspection unit 6 checks whether there is an error in the combined data (S204). As the inspection, for example, CRC (Cyclic Redundancy Check) is performed. When there is no error, the combined data is transmitted as it is to the terminal interface 1 side as restored data (S205_NO). When there is an error (S205_YES), the combined data checking means 6 notifies the error to the combining order control means 5, and the combining order control means 5 refers to the identification number identification result held (S206). Here, the order of the identification numbers in the identification result is compared to see if there is a discrepancy in the order rules for adding the identification numbers (S207). If there is no mismatch (S207_YES), it is determined that the error is not due to the join order and the process ends. If there is a mismatch (S207_YES), the joining order control means 5 changes the joining order so that it matches the order rule of the identification number (S208). As a result, the divided data can be combined in the correct order from the next time.

According to the present embodiment, it is possible to correct data correctly by correcting an error in the coupling order due to an incorrect connection without registering the line interface correspondence relationship between the transmission side and the reception side in advance.
(Fourth embodiment)
In this embodiment, an example of a specific implementation form of each function is shown. FIG. 11 is a block diagram showing the bulk transmission apparatus 100 of the present embodiment. Frame containers 7, bulk control means 8, data control means 9, and central control means 10 are provided as containers for mounting each functional unit.

  The frame control means 7 is equipped with a transmission source line interface identification means 3. In addition to the transmission source interface identification function, it has a function of generating a bulk synchronization frame. It also has a function of measuring the relative delay of each line from the received frame F bulk synchronization frame.

  The data control means 9 encapsulates the data from the terminal interface 1 into a frame format suitable for processing for the bulk transmission apparatus 100, and also performs transmission rate conversion. For example, the transmission rate of data received from the terminal interface 1 is converted into 1.5 Mbit / s PRI data (Primary Rate Interface). Further, the combined data inspection means 6 is mounted.

  The bulk control unit 8 is related to bulk communication such as data division and combination. As a specific operation, for example, data (PRI data) received from the data control means 9 is divided into BRI (Basic Rate Interface, 2 time slot units) units. It also has a function of distributing the generated divided data DD to each line interface IF. As function units, a transmission data division control unit 2, a data combining unit 4, and a combining order changing unit are mounted.

  The central control means 10 is connected to the frame control means 7, the bulk control means 8, and the data control means 9. In addition to controlling the whole, the relative delay information of each frame F and the source line interface identification information are received from the frame control means 7 and the data division / combination control means 11 also performs delay correction.

According to the present embodiment, the present invention can be realized using a general technique.
(Fifth embodiment)
In the first to fourth embodiments, the transmission line interface identification number ID-IF is added to the frame F in order to identify the transmission line interface. According to the present embodiment, identification can be performed without adding an ID-IF. In the present embodiment, the alarm transfer function of the line (dedicated line) is used.

  FIG. 12 is a block diagram showing a bulk transmission apparatus 100 used in the fifth embodiment of the present invention. In addition to the bulk transmission apparatus 100 of the fourth embodiment, line interface control means 11 for controlling the line interface IF is provided. The line interface control means 11 controls transmission / reception and stop operation of the line interface IF. Further, the transmission source line interface identifying means 3 of the present embodiment identifies the transmission source line interface according to the order in which the alarm signals are received.

  Next, the operation of this embodiment will be described using a specific example.

  In the present embodiment, the bulk transmission apparatus 100b on the reception side generates and inspects the combined data in the predetermined order for the line interface IF on the reception side, as in the fourth embodiment.

  FIG. 13 is a block diagram showing the bulk transmission system of the present embodiment. As in FIG. 5, it is assumed that an erroneous connection has occurred in which IFa1 of the transmission side line interface is connected to line L2, and IFa2 is connected to line L1. Then, an error occurs in the combined data check. When the central control means 10 detects an error, the line interface control means 11 stops the signal communication of IFb1, which is the first in the coupling order, and a communication disconnection 12 occurs with the line L1. When the communication disconnection 12 occurs, the main signal ALL1 (13) is transferred to L1 by the alarm transfer of the dedicated line 200, and the line interface IFa2 connected to L1 receives this. The source line interface IF is identified using such an operation.

  FIG. 14 is a sequence diagram showing the operation of the present embodiment. First, an error occurs in the combined data check in the receiving side bulk transmission apparatus 100b (S301). Next, IFb1 located at the head of the combination order stops communication (S302). As a result, the main signal ALL1 (13) is transmitted from the dedicated line 200 to the line 1L1 (S303). Next, the line interface IFa2 of the bulk transmission apparatus 100a receives the main signal ALL1 (13) (S304). The bulk transmission apparatus 100a recognizes that the IFa2 that first receives the main signal ALL1 (13) corresponds to the line interface IFb1 at the head (identification number 1) of the bulk transmission apparatus 100b (S305). Next, the bulk transmission apparatus 100b stops the communication of IFb2 with the second temporary connection order (identification number 2) (S306), and the main signal ALL1 (13) is transferred from the dedicated line to L2 (S307). Next, IFa1 receives the main signal ALL1 (13) (S308), and recognizes that IFa1 corresponds to the second line interface IFb2 of the bulk transmission apparatus 100b (S309). Thereafter, by sequentially repeating the same operation, the bulk transmission apparatus 100a can identify all the order (identification numbers) of the line interface IFb in the bulk transmission apparatus 100b and know the correspondence with its own line interface IFa. .

  Next, the bulk transmission apparatus 100b performs an operation for grasping the order of the line interface IF of the bulk transmission apparatus 100a. The operation is performed in the same manner as the operations from S302 to S310.

  First, the bulk transmission apparatus 100a stops the communication of the line interface IFa1 that is the head of itself, that is, the identification number 1 (S311). Then, the main signal ALL1 (13) is transferred from the dedicated line 200 to L2 (S312). Here, since there is an erroneous connection, the connection destination of IFa1 is L2. Therefore, IFb2 first receives the main signal ALL1 (13) (S313). As a result, the bulk transmission apparatus 100b recognizes that IFb2 is connected to the line interface IFa1 at the head (identification number 1) of the bulk transmission apparatus 100a (S314). Thereafter, similarly to the operations from S306 to S310, the identification numbers of the line interface IF of the bulk transmission apparatus 100a can be sequentially identified, and the identification numbers of all the IFa can be identified (S315). In other words, it is possible to know the order in which data is accurately combined. Then, the order of IFb used for combining the divided data is changed to the order of the obtained identification numbers (S316). If this order is used, the divided data can be correctly combined.

  As described above, according to the present embodiment, even if the transmission line interface identification number is not added to the frame F, the divided data are combined in the same order as the divided data of the transmission source, and the data is correctly transmitted. Can be restored.

  This embodiment is

DESCRIPTION OF SYMBOLS 1 Terminal interface 2 Transmission data division | segmentation control means 3 Source interface identification means 4 Division | segmentation data combination means 5 Connection order control means 6 Connection data inspection means 7 Frame control means 8 Bulk control means 9 Data control means 10 Central control means 11 Line interface control Means 12 Communication disconnection 13 Main signal ALL1
100 Bulk Transmission Device 200 Dedicated Line F Frame IF Line Interface ID-IF Identification Number L Line DD Divided Data

Claims (10)

  A terminal interface for inputting / outputting data to / from an external terminal, a plurality of line interfaces for transmitting / receiving data to / from a plurality of lines, and input data received from the terminal interface provided in the transmitter are divided. A transmission data division control means for generating a plurality of frames of a predetermined format and distributing and transmitting the frames to the plurality of line interfaces, and identifying the transmission source line interface of the frame received by the line interface provided from the line in the receiving unit Source interface identification means, division data combination means for extracting the divided data from the frame and combining them in a predetermined order, and combination order control for controlling the predetermined order based on the identification result of the transmission source interface identification means A bulk characterized by comprising: Feeding apparatus.   The transmission data division control means for adding an identification number of the transmission source line interface to the frame, and the transmission source interface identification means for identifying the transmission source line interface based on the identification number. The bulk transmission apparatus according to claim 1.   The data combining means combines the divided data in a predetermined order for the receiving side line interface to generate temporary combined data, and temporary combination for checking whether the temporary combined data is correct A data inspection unit; and a combination order changing unit that changes the predetermined order based on an identification result of the transmission source line interface identification unit when the temporary combination data inspection unit detects an error. The bulk transmission apparatus according to claim 1.   4. The temporary combined data checking means for transmitting the temporary combined data to the terminal interface as combined data when the temporary connection checking means does not detect the error. Bulk transmission equipment.   The bulk transmission apparatus according to claim 1, further comprising line interface control means for controlling a communication state of the line interface.   6. The bulk transmission apparatus according to claim 5, wherein the transmission source line interface identification means includes identification means for identifying the transmission source line interface based on an alarm transfer signal from a line.   A bulk comprising: at least two bulk transmission apparatuses according to any one of claims 1 to 5; and a line having a plurality of channels connecting line interfaces of the bulk transmission apparatus. Transmission system.   Receiving data from the terminal interface of the first bulk transmission device, generating divided data obtained by dividing the data, generating a frame in which a header and a line interface identification number are added to the divided data; The line interface corresponding to the line interface identification number is transmitted to the line connected to the line interface, and the frame is received from the line by the line interface of the second bulk transmission device facing the line interface. The line interface of each frame A control method for a bulk transmission system, comprising: identifying identification numbers, and combining the data in an order based on the line interface identification numbers identified by extracting the divided data from the frames.   After the line interface of the opposing bulk transmission apparatus receives the frame, the divided data is extracted from the frames and combined in a predetermined order determined for the line interface of the opposing bulk transmission apparatus to generate temporarily combined data Checking whether the temporarily combined data is restoring the original data, and changing the order of combining the divided data based on the line interface identification number when the data is not recovered by the inspection; The method for controlling a bulk transmission system according to claim 8.   A control method for a bulk transmission system having a first bulk transmission apparatus having a plurality of line interfaces and a second bulk transmission apparatus having a plurality of line interfaces connected by a plurality of lines, one in a predetermined order. The communication of the line interface of the first bulk transmission device is disconnected at a time, the alarm signal transferred from the line by the disconnection of the communication is received by the line interface of the second bulk transmission device, and the alarm signal is A control method for a bulk transmission system, wherein the second bulk transmission device identifies correspondence between its own line interface and the line interface of the first bulk transmission device according to the order of reception.

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