KR0146432B1 - A circuit for controlling the other side's dsu without a loss of data - Google Patents

Abstract

The present invention relates to a circuit capable of controlling a counterpart DSU without data loss, and more particularly, to a circuit capable of controlling a counterpart DSU without data loss that can control the parameters of the counterpart DSU in the own station DSU without data loss. The present invention relates to an RDC frame data generating means (31) for generating frame data for controlling the counterpart station DSU, an interface means (33) for exchanging data with the DTE, and pure data input through the interface means (33). And data combining means 32 for combining RDC frame data, clock generating means 34 for supplying a clock necessary for the operation of the interface means 33 and the data combining means 32, and the local DSU. RDC frame extracting means 35 for extracting RDC data from the data, and RDC frame data from the data sent from the local station DSU. And consists of the data transfer means 36, which outputs only the pure data, the interface means 33.

Description

Circuit that can control counterpart DSU without data loss

1 is a block diagram of a conventional RDC,

2 is a flowchart of a control process of a conventional RDC,

3 is a block diagram of an RDC according to the present invention,

4 is a structural diagram of a remote DSU control frame.

* Explanation of symbols for main parts of the drawings

10: Local station DSU transmitter 11: RDC pattern generator

12: Partner station parameter correction unit 13: RDC pattern receiver

14: local station DSU receiving unit 15: partner station DSU receiving unit

16: RDC pattern receiver 17: Parameter correction

18: Parameter transmission unit 19: Partner station DSU transmission unit

31: RDC frame data generator 32: data combiner

33: DTE interface 34: Clock generator

35: RDC frame extracting unit 36: data switching unit

The present invention relates to a circuit capable of controlling a counterpart DSU without data loss, and more particularly, to a circuit capable of controlling a counterpart DSU without data loss that can control the parameters of the counterpart DSU in the own station DSU without data loss. It is about.

In general, Data Service Units (DSUs) point-to-point or point-to-point digital data at 2.4, 4.8, 9.6, 19.2, 56, and 64 (kBPS). It is a device that can perform long-distance high-speed data communication between a computer and a computer or various types of terminal devices using a dedicated line of to-multi point.

The data service unit according to the prior art is composed of a local station DSU and a partner station DSU, and the partner station DSU control circuit (RDC Remote DSU Control) is configured as shown in FIG.

First, the local station DSU can modify the RDC pattern generating unit 11 for generating the RDC pattern for controlling the parameters of the counterpart DSU, the RDC pattern receiving unit 13 for receiving the RDC pattern sent from the other station, and the parameters of the other station. And a counterpart station parameter corrector 12, and a DSU transmitter and receiver 10 and 14 for transmitting and receiving data.

The counterpart DSU includes an RDC pattern receiver 16 for receiving an RDC pattern sent from the own station, a parameter transmitter 18 for transmitting parameters to the own station, and a parameter correction unit 17 for modifying parameters sent from the own station. And a DSU transmitter and receiver 19, 15 for transmitting and receiving data.

The conventional counter station control circuit configured as described above operates as follows.

When the local station DSU generates the RDC pattern in the local station's RDC pattern generator 11 to modify the parameters of the other station's DSU, and transmits it to the other station's DSU receiving unit 15 and the RDC pattern receiving unit 16 through a transmission line, In the case of data, the receiving station DSU receiving unit 15 performs the receiving process, and in the case of the RDC request pattern, the RDC pattern receiving unit 16 detects and discriminates and notifies the parameter transmitting unit 18 of this.

When the parameter transmitter 18 detects the RDC request pattern, the parameter transmitter 18 transmits the parameter to the local station DSU through the transmission line.

The RDC pattern receiving unit 13 receives the parameter, passes it to the counterpart parameter correction unit 12, and the user modifies the parameter and transmits it to the counterpart station DSU again in the same manner as the RDC pattern. Send to your country.

The above operation process will be described in more detail with reference to the conventional RDC flow chart shown in FIG.

First, when the local station DSU sends the RDC attempt pattern at the request of the user, when the partner station DSU receives the RDC pattern and sends the parameter to the local station, the local station accepts the other station's parameter.

On the other hand, online data service is being performed while changing the counter station parameters.

The user changes the received destination station parameters, sends them to the destination station, accepts and changes the changed parameters at the destination station, and sends an ACK (Acknowledge) pattern to the local station. When the ACK pattern is received from the local station, the process of controlling the other station is completed.

However, the conventional counterpart DSU control circuit configured and operated as described above sends an RDC pattern to read the parameters of the counterpart data service unit, sends the instant of reading the parameters of the counterpart station, and sends the changed parameters to the ACK (Acknowledge). There is a problem that data loss occurs at the moment of receiving the pattern.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a circuit capable of controlling a counterpart DSU without data loss in which data loss does not occur while controlling the parameters of the counterpart DSU.

The present invention provides an RDC frame data generating means for generating frame data for controlling the counterpart DSU, an interface means for exchanging data with the DTE, pure data and RDC inputted through the interface means. A data combining means for combining frame data, a clock generating means for supplying a clock necessary for the operation of the interface means and the data combining means, an RDC frame extracting means for extracting RDC data from data transmitted from a local station DSU, Provided is a circuit capable of controlling the counterpart DSU without data loss consisting of data switching means for removing RDC frame data from the data sent from the DSU and outputting only pure data to the interface means.

Hereinafter, a circuit capable of controlling the counterpart station DSU without data loss according to the present invention will be described in detail with reference to FIGS. 3 and 4. FIG.

First, the configuration of the present invention is as follows.

The local station DSU includes an RDC frame data generator 31 generating frame data for controlling the counterpart station DSU, a DTE interface 33 necessary for exchanging data with the DTE, and pure data received through the DTE interface 33. And a data combiner 32 for combining RDC frame data, a clock generator 34 for supplying a clock necessary for the operation of the DTE interface 33 and the data combiner 32, and a local DSU. An RDC frame extracting unit 35 for extracting RDC data from the data, and a data switching unit 36 for removing RDC frame data from the data sent from the local station DSU and outputting only pure data to the DTE interface 33. .

Operation of the present invention configured as described above is as follows.

On the DSU transmitting side of the local station, the data inputted from the DTE is transmitted to the data combiner 32 in accordance with the clock of 8x (N-1) (kHz) of the clock generator 34 via the DTE interface 33, and the RDC The RDC frame data generated by the frame data generator 31 is transferred to the combiner 32.

Then, the data combiner 32 combines the RDC frame data and the data sent from the DTE in accordance with the clock of the clock generator 34 at 8 x N (kHz) and sends them out to the transmission line.

On the other hand, data coming into the counterpart DSU receiving side enters the RDC frame extracting unit 35 and the data switching unit 36. The RDC frame extractor 35 extracts frame data to generate a data enable signal. The data switching unit 36 transfers only pure data to the DTE interface 33 by using the data enable signal in the data transmitted from the circuit side.

The data frame structure of the DTE side and the circuit side will now be described with reference to the fourth structure of the data frame applied to the present invention.

In a general communication environment, the speed of data transmitted from the DTE is the same as that of the data going out of the line, so there is no extra bit to insert a remote control signal for controlling the counterpart DSU. In order to solve this problem, the speed of data transmitted from the DTE is adjusted to a lower speed, and a control signal is inserted into a bit that differs between the DTE speed and the circuit speed, and then transmitted.

The present invention configured and operated as described above can achieve reliable data communication since data on the online service can be communicated without any loss even when requesting and transmitting the parameters of the counterpart DSU.

Claims (1)

A data communication system comprising a local station DSU and a partner station DSU, comprising: RDC frame data generating means 31 for generating frame data for controlling the counterpart station DSU, interface means 33 necessary for exchanging data with the DTE, and the interface. Data combining means 32 for combining the pure data received through the means 33 and the RDC frame data; an RDC frame extracting means 35 for extracting RDC data from data sent from the local station DSU; and the interface means. (33) and the clock generating means (34) for supplying the clock necessary for the operation of the data combining means (32), and removing the RDC frame data from the data sent from the local station DSU and outputting only pure data to the interface means (33). A circuit capable of controlling the counterpart DSU without data loss, characterized in that it comprises a data switching means (36).