JPH0773271B2 - Data transfer method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Overview] Regarding a data transfer method for transferring data received by a modem, a buffer is provided for each modem in a collective modem, and after temporarily storing the modem information and data, the polling is supported. For the purpose of transferring only normal modem information data (telegram) to the polling source, and reliably transferring data from modems other than the faulty modem, the modem information such as line status and own modem status is transmitted. The modem status collection unit provided in each modem to be collected and each modem information collected by this modem status collection unit and the data transferred via the line are transferred via a common bus commonly connected to a plurality of modems. It is equipped with a buffer provided for each modem for collecting and temporarily accumulating, and the modem information accumulated in this buffer in response to polling is provided. It is configured to transfer the data (telegram) of the normal one of the information to the polling source.

[Industrial application field]

The present invention relates to a data transfer system for transferring data received by a modem.

[Problems to be Solved by Conventional Techniques and Inventions]

Conventionally, in a collective modem that collects a plurality of modems,
As shown in the figure (a), the failure information such as the line failure is collected using the secondary channel (for example, the secondary channel using the band of 300 to 400 Hz) between the modems via the line, and the 1 After storing in one character buffer, failure information and data (telegram) were sequentially transferred to the monitoring system in response to polling, and monitoring was performed.

Therefore, in FIG. 5B, the modem 1ch is normal in response to polling (Poll-1) for the modem 1ch as shown in the figure, but as shown in
When ch generates dust data due to a line failure, etc., this dust data is stored and mixed in one character buffer as shown in the figure, and this dust data is transferred along with the data (telegram) in response to polling. However, there is a problem that the monitoring data of the modem connected to the normal line is disturbed. As a result, the monitoring system makes no response even to the normal modem that has been disturbed, making it difficult to isolate the failure.

The present invention provides a buffer for each modem in the aggregate modem,
The purpose is to temporarily store the modem information and data in this, and then transfer only the data of normal modem information to the polling source in response to polling, and to reliably transfer the data from the modem other than the faulty modem. There is.

[Means for solving the problem]

 Means for solving the problems will be described with reference to FIG.

In FIG. 1, the aggregate modem 3 is an aggregate of a plurality of modems 7.

The buffer 5 is provided for each modem 7, and temporarily stores modem information (information such as line failure) and data (telegram) transferred via the line.

The modem state collecting unit 8 collects line information (line failure, etc.) and the state of the modem 7.

[Action]

According to the present invention, as shown in FIG. 1, a modem status collecting unit 8 provided in each modem 7 collects modem information such as line status (line failure, etc.) and status of the modem, and the modem information and line Data (telegram) transferred via
Both are temporarily stored in the buffer 4 provided for each modem 7 in the control unit 4 via the common bus 6, and data of normal one of the modem information stored in the corresponding buffer 5 in response to polling is stored. Only (telegram) is transferred to the polling source.

Therefore, once the modem information and data of each modem 7 are accumulated in the respective buffers 5 provided in the collective modem 3, only the normal modem information data (telegram) is transferred in response to the polling, so that the failure occurs. It is possible to reliably transfer the data (telegram) from a modem other than the modem in which the error occurred to the polling source.

〔Example〕

Next, the configuration and operation of one embodiment of the present invention will be sequentially described in detail with reference to FIGS. 1 to 3.

In FIG. 1, an NSP (control console) 1 is for displaying instructions for centrally monitoring modems, etc., which compose a network, and the monitoring status thereof. Command input, alarm display, printout And so on.

NIP (Network Interface Processor) is N
Collective modem (subrack) in response to instructions from SP1
3 is a processor that controls data transfer to and from No. 3.

The collective modem (subrack) 3 is composed of a control unit 4 for performing various controls of the whole, a plurality of modems 7, a common bus 6 connecting these, and the like.

The buffer 4 is a buffer provided in the control unit 4 in association with the modem 7, and stores the modem information (line status, modem status, etc.) of each modem 7 and the data (telegram) transferred via the line. It will be accumulated once.

Next, the operation of the configuration shown in FIG. 1 will be described in detail with reference to FIGS. 3 and 4 in the order shown in the flowchart of FIG.

In FIG. 2, the NIP 2 issues polling (i) to the collective modem 3.

Is transmitted to each modem 7 by the control unit 4 of the collective modem 3.

, The modem 7 transfers the response information to the control unit 4.
This is because the line status collected by the modem status collecting unit 8 of each modem 7, the modem information such as the status of the modem, and the data (telegram) transferred via the line are stored in the control unit 4 via the common bus. This means that the data is transferred to the buffer 5 provided for each modem 7 and temporarily stored. At this time, as shown in FIG. 3, modem 1ch, modem 2ch ... modem nch
Since a character buffer (corresponding to the buffer 5 in FIG. 1) 5-1 is provided in the aggregate modem control unit in association with the above, the garbage data is converted into other modem information as compared with the conventional configuration in FIG. There is no mixing. More specifically, referring to FIG. 4, the modem 1c corresponding to the polling (Poll-1) for the modem 1ch as shown in FIG.
Although h is normal, if the modem 2ch generates garbage data due to a line failure or the like as shown in, the character buffer 5-1 is provided for each modem. Of the character buffer 5-1 that corresponds to the modem 7 other than the modem 7 in which the line failure has occurred without the dust data of the device being mixed into the modem information of the modem 1ch.
Never accumulated in. On the other hand, for modem 2ch, R
As shown in ES-2, dust data generated due to a line failure of the own modem 2ch is mixed, but this is unavoidable because it is due to the own line failure.

Is transferred to the NIP2 by the control unit 4. This means that, in response to the polling (i) issued in, only normal data (telegram) of the relevant modem information stored in the buffer 4 is transferred as RES (response information). There is.

By the above procedure, in response to polling from NIP2,
Only normal data (telegram) of the modem information stored in the buffer 5 provided for each modem 7 in the control unit 4 is reliably transferred.

FIG. 3 shows a configuration diagram of a main part of the present invention.

In FIG. 3, the character buffer 5-1 in the collective modem control unit corresponds to the buffer 5 in FIG. 1 and is provided for each modem 7. To this character buffer 5-1, modem information (line status, modem status, etc.) transferred from the modem 1ch, modem 2ch ... Modem nch via the common bus 6 and all transferred via the line. Each message is temporarily stored. Then, in response to polling, only the telegram of which the stored modem information is normal is transferred to the polling source.

FIG. 4 shows an operation explanatory diagram of the present invention.

FIG. 4 shows a state in which normal response information (RES-1) is fetched from the common bus in response to polling (poll-1).

The figure shows a state in which response information (RES-2) including dust data is fetched from the modem 2 (modem 2ch) via the common bus 6 in response to polling.

In the figure, even if dust data is generated at, the buffer 5 is not provided to other modems 7 in the buffer 5 in accordance with the provision of the buffer 5 for each modem 7 in this embodiment. Indicates.

〔The invention's effect〕

As described above, according to the present invention, after temporarily storing the modem information and data (telegram) of each modem 7 in each buffer 5 provided in the control unit 4 of the collective modem 3,
Since a configuration is adopted in which only normal modem information data (telegram) is transferred in response to polling, only data from a modem other than the failed modem can be reliably transferred to the polling source. Further, since the buffers 5 are provided in association with the modems 7, respectively, even if data comes from the modems 7 in the collective modem at the same time, the data do not collide with each other and the data can be transferred quickly.

[Brief description of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, FIG. 2 is a flowchart for explaining the operation of the present invention, FIG.
FIG. 4 is a diagram for explaining the operation of the present invention, and FIG. 5 is a diagram for explaining the conventional technique. In the figure, 2 is a NIP (network interface), 3 is a collective modem, 4 is a control unit, 5 is a buffer, 6 is a common bus, 7 and 9 are modems, and 8 is a modem status collection unit.

Claims (1)

[Claims] 1. In a data transfer system for transferring data received by a modem, a modem status collecting unit (8) provided in each modem (7) for collecting modem information such as line status and status of own modem, To collect and temporarily store the modem information collected by the modem status collecting unit (8) and the data transferred via the line via a common bus (6) commonly connected to a plurality of modems. With the buffer (5) provided for each modem, the normal data (telegram) of the modem information stored in this buffer (5) corresponding to polling is transferred to the polling source. A data transfer method characterized by being configured.