KR200184113Y1 - Switching apparatus for data transmitting port - Google Patents

Abstract

The present invention relates to a switching device for a data transmission port capable of minimizing a data transmission error between a provider side and a subscriber side having different data rates. In order to provide data from the supplier to the supplier MC, the transmission clock signal generated from the supplier physical layer is simultaneously input and used as the transmission clock signal and the reference clock signal of the supplier MC. Further, the valid signals generated from the supplier physical layer and the subscriber physical layer, respectively, are simultaneously input as valid signals and carrier signals of the supplier MC and the subscriber MC. Therefore, since the clock between the transmission clock signal and the reference clock signal for transmitting the input data is always coincident, it is possible to minimize the error of data transmission due to the mismatch of the clock between the transmission clock signal and the reference clock signal. Can be.

Description

Switching device for data transmission port {SWITCHING APPARATUS FOR DATA TRANSMITTING PORT}

The present invention relates to a switching device for a data transmission port, and more particularly, to a switching device for a data transmission port that can minimize the data transmission error between the provider side and the subscriber side having different data rates. .

1 is a block diagram showing the configuration of a network constructed using a conventional two-port switch circuit.

Referring to FIG. 1, data from a supplier input through a supplier input / output port 10 is transferred to a switching controller 40 via a supplier physical layer 20 and a supplier Media Access Controller 30. And is provided to the subscriber through the subscriber MC 50, the subscriber physical layer 60, and the subscriber I / O port 70.

In contrast, data from the subscriber is switched by the switching controller 40 via the subscriber I / O port 70, the subscriber physical layer 60, and the subscriber MC 50, and then the supplier MC 30, the supplier physical layer. 20 and is provided to the supplier through the supplier input / output port 10.

In this case, the provider physical layer 20 and the subscriber physical layer 60 has a transmission rate of 10 [Mbps], 1 [Mbps], respectively, the supplier physical layer 20, the supplier MC 30, and the subscriber physical layer 60 And the interface between the subscriber MC 50 is as shown in FIG.

2 is a view showing the configuration of the interface of the conventional two-port switch circuit shown in FIG.

Referring to FIG. 2, a transmission clock signal TX_CLK for transmitting data generated from the provider physical layer 20, a valid signal RX_DV and a carrier signal CRS indicating whether data is valid are provided by a provider. The signal input terminal of the MC 30 is input one-to-one. In addition, a reference clock signal (25 MHz) for receiving data from the supplier physical layer 20 is generated from a separate oscillator 80 and input to the supplier MC 30. Meanwhile, the valid signal RX_DV and the carrier signal CRS generated from the subscriber physical layer 60 are also input to the signal input terminal of the subscriber MC 50 in a one-to-one manner.

However, as described above, when the provider physical layer 20 and the subscriber physical layer 60 have different transmission rates, data transmission errors frequently occur. That is, the transmission clock signal TX_CLK for transmitting data is variable depending on the data, whereas the reference clock signal is fixed, so that the synchronization clock does not match and the data is not transmitted normally. In addition, since a separate oscillator 80 is used to generate the reference clock signal, the unit cost of the circuit configuration increases.

The present invention proposed to solve the above problems is to provide a switching device for a data transmission port that can minimize the data transmission error between the provider side and the subscriber side having different data rates.

1 is a block diagram showing the configuration of a network constructed using a conventional two-port switch circuit;

2 is a view showing the configuration of the interface of the conventional two-port switch circuit shown in FIG.

3 is a block diagram showing a configuration of a network constructed by using a switching device for a data transmission port according to an embodiment of the present invention; And

4 is a view showing the configuration of a switching device for a data transmission port according to an embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

10, 100: supplier input / output port

20, 110: physical layer of supplier side

30, 120: MC of supplier side

40, 130: switching controller

50, 140: MC of subscriber side

60, 150: physical layer of subscriber side

70, 160: subscriber input / output port

The switching device for a data transmission port according to the present invention for achieving the above object, the first physical layer and the first MC installed on the supplier side for transmitting and receiving data to each other, the second physical layer and the second installed on the subscriber side 2. A switching device for a data transmission port for transmitting data having 2 MCs, wherein the first physical layer variably generates a transmission clock signal for transmitting data from the provider in synchronization with an input clock of the data. And a valid signal indicating whether or not the data is valid, wherein the first MC is configured to receive a clock signal and a reference clock for receiving the transmission clock signal from the first physical layer from the provider. Are simultaneously input as a signal and receive the valid signal from the first physical layer A valid signal indicating that the data is received from the layer and a carrier signal are simultaneously input, and the second physical layer generates a valid signal indicating whether or not the data from the subscriber is valid, and the second MC The valid signal from the second physical layer is simultaneously input as a valid signal and a carrier signal indicating that the data is received from the second physical layer.

According to such a switching device for a data transmission port, the transmission clock signal generated from the supplier physical layer in order to provide data from the supplier to the supplier MC through the supplier physical layer is used as the transmission clock signal and the reference clock signal of the supplier MC. It is input and used at the same time. Further, the valid signals generated from the supplier physical layer and the subscriber physical layer, respectively, are simultaneously input as valid signals and carrier signals of the supplier MC and the subscriber MC.

Hereinafter, a switching device for a data transmission port according to an exemplary embodiment of the present invention will be described in more detail with reference to FIGS. 3 and 4.

3 is a block diagram showing the configuration of a network constructed by using a switching device for a data transmission port according to an embodiment of the present invention.

Referring to FIG. 3, a switching device for a data transmission port according to an exemplary embodiment of the present invention includes a first input / output port 100, a first physical layer 110, a first MC 120, and a switching controller 130. And a second MC 140, a second physical layer 150, and a second input / output port 160. Here, the first input / output port 100, the first physical layer 110 and the first MC 120 is a supplier side circuit, the second MC 140, the second physical layer 150 and the second Input / output port 160 is a subscriber side circuit.

First, data from the supplier input through the first input / output port 100 is input to the switching controller 130 via the first physical layer 110 and the first MC 120.

Next, the data switched by the switching controller 130 is provided to the subscriber through the second MC 140, the second physical layer 150, and the second input / output port 160.

Meanwhile, data from the subscriber is input to the switching controller 130 via the second input / output port 160, the second physical layer 150, and the second MC 140.

Next, the data switched by the switching controller 130 is provided to the provider through the first MC 120, the first physical layer 110, and the first input / output port 100.

Here, the first physical layer 110 and the second physical layer 150 has a transmission rate of 10 [Mbps], 1 [Mbps], respectively, the first physical layer 110 and the first MC 120, and An interface for data transmission between the second physical layer 150 and the second MC 140 is illustrated in FIG. 4.

4 is a view showing the configuration of a switching device for a data transmission port according to an embodiment of the present invention.

Referring to FIG. 4, the first physical layer 110 transmits the transmission clock signal TX_CLK for transmitting the data provided from the provider to the first MC 120 through the first input / output port 100. Occurs variably according to the input of the data.

In addition, the first physical layer 110 provides a valid signal RX_DV to the first MC 120 indicating whether data transmitted to the first MC 120 is valid.

Meanwhile, the first MC 120 not only receives the transmission clock signal TX_CLK generated from the first physical layer 110 as a transmission clock signal TX_CLK for receiving the data, but also a reference clock signal. It is also input as (25MHz). That is, the first MC 120 uses the transmission clock signal TX_CLK generated from the first physical layer 110 as a transmission clock signal and a reference clock signal.

Accordingly, when the clock of the transmission clock signal TX_CLK from the first physical layer 110 is changed, the clock is changed so that the reference clock signal also has the same clock as the transmission clock signal TX_CLK. Therefore, the data input from the first physical layer 110 and the reference clock signal are always matched to minimize the data transmission error due to the inconsistency of the synchronization clock.

In addition, the first MC 120 may include a valid signal RX_DV indicating that the valid signal RX_DV generated from the first physical layer 110 is received from the first physical layer 110. It is simultaneously received as a carrier signal (CRS).

On the other hand, when the data from the second physical layer 150 is transmitted from the subscriber through the second input and output port 160 to the second MC 140, a valid signal indicating whether the data is valid ( RX_DV) is provided to the second MC 140.

In addition, the second MC 140 may include a valid signal RX_DV indicating that the valid signal RX_DV generated from the second physical layer 150 is received from the second physical layer 150. It is simultaneously received as a carrier signal (CRS).

According to the switching device for a data transmission port as described above, the transmission clock signal generated from the supplier physical layer to provide data from the supplier to the supplier MC through the supplier physical layer is the transmission clock signal and the reference clock of the supplier MC It is input and used simultaneously as a signal. That is, when the clock of the transmission clock signal generated from the physical layer is changed according to the data, the clock of the reference clock signal input to the supplier MC is changed to be synchronized with the clock of the transmission clock signal. Further, the valid signals generated from the supplier physical layer and the subscriber physical layer, respectively, are simultaneously input as valid signals and carrier signals of the supplier MC and the subscriber MC.

Therefore, since the clock between the transmission clock signal and the reference clock signal for transmitting the input data is always coincident, it is possible to minimize the error of data transmission due to the mismatch of the clock between the transmission clock signal and the reference clock signal. Can be.

In addition, in the present invention, since the oscillator for generating the reference clock signal provided to the supplier MC is not separately configured, the cost for the circuit configuration can be reduced.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art various modifications of the present invention without departing from the spirit and scope of the present invention described in the utility model registration claims below And can be changed.

Claims (1)

In the switching device for a data transmission port for transmitting data having a first physical layer and a first MC installed on the supplier side and a second physical layer and a second MC installed on the subscriber side for transmitting and receiving data to each other, , The first physical layer variably generates a transmission clock signal for transmitting data from the provider side in synchronization with an input clock of the data, generates a valid signal indicating whether the data is valid, and generates the first M signal. The AC simultaneously receives the transmission clock signal from the first physical layer as a clock signal and a reference clock signal for receiving the data provided from the provider side, and receives the valid signal from the first physical layer as the first clock signal. Simultaneously input as a valid signal and a carrier signal indicating that the data is received from the physical layer, and the second physical layer generates a valid signal indicating whether or not the data from the subscriber side is valid, and the second MC 2 uploading the valid signal from the physical layer from the second physical layer; A switching device for a data transmission port, characterized in that simultaneously receiving as a valid signal and a carrier signal indicating that the data is received.