WO2013008961A1

WO2013008961A1 - System for automatically checking the connection of an optical cable in an optical ethernet transmission system having a ring-shaped network structure

Info

Publication number: WO2013008961A1
Application number: PCT/KR2011/005058
Authority: WO
Inventors: 홍성창
Original assignee: 주식회사 아론네트웍; (주)브레인월드
Priority date: 2011-07-11
Filing date: 2011-07-11
Publication date: 2013-01-17

Abstract

The present invention relates to a system for automatically checking the connection of an optical cable in an optical Ethernet transmission system having a ring-shaped network structure. The system for automatically checking the connection of the optical cable in the optical Ethernet transmission system having the ring-shaped network structure according to the present invention comprises: a plurality of remote devices, each connected by an optical cable made of a working line and a protective line; a central processing unit controlling an optical network signal provided to the plurality of remote devices, and performing a switching operation when an optical cable connection among the plurality of remote devices is faulty; and a duplexed first optical core network and second optical core network which transmit optical data in a first direction, and in a second direction opposite thereto, through the working line and the protective line, from the central processing unit across the plurality of remote devices to the central processing unit. The plurality of remote devices and the central processing unit have a display unit and a serial interface installed at front surfaces thereof. The display unit automatically displays optical cable connection information on the remote devices or the central processing device respectively connected to front ends and rear ends of the plurality of remote devices and of the central processing unit. The serial interface is connected to the display unit, uses an asynchronous Ethernet frame, and includes a checking test button for checking both optical cable connection information and whether or not optical data is transmitted/received.

Description

Automatic checking of optical cable connection in optical Ethernet transmission system with annular network structure

The present invention relates to an optical cable connection automatic confirmation system in an optical Ethernet transmission system having an annular network structure.

With the recent increase of the large capacity network service using Ethernet, many devices are expanded, and the connection between the devices is composed of point-to-point, 1: N, and annular networks. In addition, when the physical line section between the node and the optical cable is connected, the existing PDH or SDH series equipment can check the optical path by putting a code in the connection line periodically in the channel of the frame in a synchronous manner, Asynchronous devices that transmit TCP / IP packets, such as Ethernet, suffer from many difficulties in initial installation and maintenance because there is no way to periodically insert code into the connection line. In order to solve this problem, the facility invests a lot of time and money by using various measuring equipment to check the optical line or solve it by an experienced method. The reason for the need for early detection and correction of poorly installed fiber cabling sections between devices in an optical Ethernet signal transmission system is to prevent network collisions and collapses caused by loops of unexpected Ethernet data packets caused by faulty fiber cabling. Because.

Therefore, when using an annular network that has high efficiency in terms of line and installation cost and installation compared to existing point-to-point and network structures such as 1: N, due to the complexity of the connection due to the different network configuration method from the existing network structure, In terms of installation or maintenance, there is a need for further inspection of the optical lines.

Accordingly, the present invention provides an optical Ethernet transmission system having an annular network structure that can automatically check the connection state of the optical cable constituting the optical communication network through a display unit installed on the front of the remote device and the central processing unit without additional equipment. Its purpose is to provide a system for automatically checking optical fiber connections.

In addition, the present invention is to occupy the pay traffic space to a minimum for asynchronous events generated between nodes when switching in the optical communication network, and also for fast recovery speed and control when performing the transfer by hardware means To provide a system for automatically checking optical cable connection in an optical Ethernet transmission system having an annular network structure capable of providing a larger amount of real traffic Ethernet data to the optical Ethernet signal transmission system by drastically reducing the amount of Ethernet packets used. The purpose.

In the optical Ethernet transmission system having an annular network structure according to the present invention, the automatic connection of the optical cable connection system, each of the plurality of remote devices connected by an optical cable consisting of a working line and a protection line; A central processing unit controlling the optical Ethernet signals provided to the plurality of remote devices and performing a switching operation when the optical cable connection between the plurality of remote devices is incorrect; And a duplicated first optical core network through which the optical data is transmitted from the central processing unit through the plurality of remote devices to the central processing unit through the working line or the protection line in a second direction opposite to the first direction and the opposite direction. And a second optical core network, wherein the front surface of the plurality of remote devices and the central processing unit includes the plurality of remote devices and the central processing unit and a remote device or a central processing device connected to each of the front and rear ends thereof. And a serial interface including a display unit for automatically displaying optical cable connection information, and a test button connected to the display unit to check whether optical data is transmitted and received and the optical cable connection information using an asynchronous Ethernet frame. do.

The plurality of remote devices and the central processing unit may detect the optical cable connection information that is actively generated and automatically display the front display unit.

In the serial interface, when the test button is pressed, TPG (Test Patten Generator) for each optical cable line is transmitted to the next node as an asynchronous Ethernet frame to the corresponding remote device, and the node confirms this and transmits and receives optical data and connects the optical cable. The information may be checked and displayed on the display unit.

The display unit may include a plurality of LEDs, and the plurality of LEDs may indicate whether optical data from an adjacent remote device or a central processing unit is received from the corresponding device.

The display unit may include a plurality of LEDs, and the plurality of LEDs may represent the number of remote devices connected to the first optical core network or the second optical core network in binary.

The display unit may be configured of a plurality of LEDs, and the plurality of LEDs may be displayed in binary format, in which a corresponding device is connected according to a connection order of the first optical core network or the second optical core network.

Each remote device actively detects whether the first optical core network and the second optical core network are physically connected to form an NMS frame including the physical connection information, and converts the NMS frame into an optical Ethernet signal. Transmitting and receiving control signals using an inter packet gap (IPG) between packets, and transmitting the control signal to the central processing unit through the adjacent remote device in an asynchronous Ethernet frame for an optical cable line fault event. Is characterized in that the switching of the plurality of remote devices using the received NMS frame.

Each remote device actively detects whether the first optical core network and the second optical core network are physically connected to form an NMS frame including the physical connection information, and the central processing unit and the respective remote device. The apparatus includes an inter-packet gap between the packet of the optical Ethernet signal and asynchronous network management data to prevent collisions and collapses of the network caused by loops of the Ethernet data packet caused by the wrong optical cable connection. It is possible to automatically prevent looping of Ethernet data packets by putting them in IPG).

The central processing unit and the plurality of remote devices, including a field programmable gate array (FPGA), operate independently without being associated with a separate central processing unit, and operate the first optical core network and the second optical core network. Characterized in performing the transfer of.

The plurality of remote devices are configured in a plug-in manner so that each remote device is connected to the first optical core network and the second optical core network.

As described above, according to the present invention, the connection state of the optical cable constituting the optical communication network can be automatically checked through the display unit installed on the front of the remote device and the central processing unit without additional equipment.

In addition, according to the present invention, when a large number of nodes are connected in the optical core network, if a node fails, the user can easily find the node directly in the field.

In addition, according to the present invention, since a control signal is transmitted and received to an inter packet gap (IPG) and transmitted to each node in an asynchronous Ethernet frame for an optical cable line fault event, the control information in the packet is continuously included. Unlike the existing method of transmitting and using, more than 99% of payload packets can be used for data transmission in the total real traffic space, thereby maximizing data communication efficiency.

Specific matters other than the problem to be solved, the problem solving means, and the effects of the present invention as described above are included in the following embodiments and the drawings. Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. Like reference numerals refer to like elements throughout.

1 is a view showing a connection structure of the optical cable connection automatic confirmation system in an optical Ethernet transmission system having an annular network structure according to the present invention.

FIG. 2A is a diagram illustrating a state of a display unit when a test button of a central processing unit is pressed when an optical cable of an optical cable connection automatic checking system in the optical Ethernet transmission system having the annular network structure of FIG. 1 is normally connected; FIG.

FIG. 2B is a view illustrating a state of a display unit when a test button is pressed in a first remote device when an optical cable of an optical cable connection automatic check system in the optical Ethernet transmission system having the annular network structure of FIG. 1 is normally connected; .

FIG. 2C is a view illustrating a state of a display unit when a test button of a second remote device is pressed when the optical cable of the optical cable connection automatic checking system in the optical Ethernet transmission system having the annular network structure of FIG. 1 is normally connected. .

FIG. 2D is a view illustrating a state of a display unit when a test button is pressed on a third remote device when the optical cable of the optical cable connection automatic confirmation system in the optical Ethernet transmission system having the annular network structure of FIG. 1 is normally connected. .

FIG. 3A is a diagram illustrating a state of a display unit when a test button is pressed in the central processing unit when an optical cable of an optical cable connection automatic confirmation system in the optical Ethernet transmission system having the annular network structure of FIG. 1 is incorrectly connected; FIG.

FIG. 3B is a view illustrating a state of a display unit when a test button is pressed on a first remote device when an optical cable of an optical cable connection automatic check system in the optical Ethernet transmission system having the annular network structure of FIG. 1 is incorrectly connected; .

3C is a view illustrating a state of a display unit when a test button is pressed on a second remote device when an optical cable of an optical cable connection automatic confirmation system in the optical Ethernet transmission system having the annular network structure of FIG. .

FIG. 3D is a view illustrating a state of a display unit when a test button is pressed on a third remote device when an optical cable of an optical cable connection automatic check system in the optical Ethernet transmission system having the annular network structure of FIG. 1 is incorrectly connected. .

4 is a display unit when the test button is pressed on the second remote device when the optical cable connection is wrong at a position different from the automatic checking of the optical cable connection in the optical Ethernet transmission system having the annular network structure of FIGS. 3A to 3D. Drawing showing the state of.

FIG. 5 is a diagram illustrating an optical Ethernet signal transmission flow in a general state in an optical cable connection automatic checking system in an optical Ethernet transmission system having an annular network structure according to the present invention; FIG.

FIG. 6 is a schematic diagram illustrating the flow of data when an error occurs in a second optical core network of an optical cable connection automatic checking system in an optical Ethernet transmission system having an annular network structure according to the present invention; FIG.

FIG. 7 is a schematic diagram illustrating the flow of data when an error occurs in a first optical core network of an optical cable connection automatic checking system in an optical Ethernet transmission system having an annular network structure according to the present invention; FIG.

8 is a schematic diagram showing the flow of data when abnormalities occur simultaneously in the first and second optical core networks of the optical cable connection automatic confirmation system in the optical Ethernet transmission system having an annular network structure according to the present invention.

FIG. 9 is a schematic diagram illustrating the flow of data when abnormalities occur simultaneously in the first and second optical core networks of the optical cable connection automatic confirmation system in the optical Ethernet transmission system having the annular network structure according to the present invention; FIG.

10a and 10b is a connection of the optical cable between the central processing unit and the first remote device, the first remote device and the second remote device of the optical cable connection automatic confirmation system in the optical Ethernet transmission system having an annular network structure according to the present invention The figure which shows the state of a display part in case of a mistake.

FIG. 11 is a view illustrating a connection of an optical cable between a first remote device and a second remote device, a second remote device, and a third remote device in an optical cable connection automatic confirmation system in an optical Ethernet transmission system having an annular network structure according to the present invention. The figure which shows the state of a display part in case of a mistake.

12 is a cross-sectional view between a central processing unit and a first remote device, a first remote device and a second remote device, and a second remote device of an automatic cable connection confirmation system in an optical Ethernet transmission system having an annular network structure according to the present invention. A diagram showing the state of the display section when the optical cable is incorrectly connected between the third remote apparatus and the third remote apparatus and the central processing unit.

13 is a line fault is generated between the first remote device and the second remote device of the optical cable connection automatic confirmation system in the optical Ethernet transmission system having an annular network structure according to the present invention, the second remote device and the third remote device The figure which shows the state of a display part in the case of disconnection and the connection of the optical cable between a 3rd remote apparatus itself, and a 3rd remote apparatus and a central processing unit is wrong.

14 is a view showing a display unit of a remote device for expressing the position of a remote device constituting a system for automatically checking an optical cable connection in an optical Ethernet transmission system having an annular network structure according to the present invention;

FIG. 15 is a view showing an example of a display unit of a central processing unit expressing the number of remote devices forming an optical cable connection automatic confirmation system in an optical Ethernet transmission system having an annular network structure according to the present invention; FIG.

16 is a view showing a display unit and a serial interface installed on the front of the remote device and the central processing unit of the optical cable connection automatic confirmation system in the optical Ethernet transmission system having an annular network structure according to the present invention.

FIG. 17 is a schematic diagram illustrating a central office terminal (COT) of a system for automatically checking a connection of an optical cable in an optical Ethernet transmission system having an annular network structure according to the present invention; FIG.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the accompanying drawings are only described in order to more easily disclose the contents of the present invention, but the scope of the present invention is not limited to the scope of the accompanying drawings that will be readily available to those of ordinary skill in the art. You will know.

1 is a view showing a connection structure of the optical cable connection automatic confirmation system in an optical Ethernet transmission system having a ring network structure according to the present invention.

As shown in Figure 1, the optical cable connection automatic confirmation system in the optical Ethernet transmission system having an annular network structure according to the present invention is a plurality of remote devices (121, 122, 123), the central processing unit 110, the first Optical core networks ET to ER and second optical core networks WT to WR.

To describe in detail the connection structure of the optical cable connection automatic check system in the optical Ethernet transmission system having an annular network structure according to the present invention, first, a plurality of

remote devices

121, 122, 123 are each trunk walking line optical cable (Trunk) It is connected to the Working Line Optic Cable (hereinafter referred to as the "working line") and the Trunk Protection Line Optic Cable (hereinafter referred to as the "protection line"). In addition, the central processing unit 110 is connected to the plurality of

remote devices

121, 122, 123 connected to the front and rear ends thereof by an optical cable, and provided to the plurality of

remote devices

121, 122, 123. The optical Ethernet signal is controlled and the switching operation is performed when the optical cable connection between the plurality of

remote devices

121, 122, 123 is wrong or when the optical cable line is disconnected. In addition, the first optical core network (ET ~ ER) and the second optical core network (WT ~ WR) from the central processing unit 110 through the plurality of remote devices (121, 122, 123) the central processing unit The optical data is transmitted to the first direction 910 and the second direction 920 opposite to the working line or the protection line at 110. In addition, the front surface of the plurality of remote devices (121, 122, 123) and the central processing unit 110 includes a serial interface (not shown) including a test button (not shown), and by the operation of the test button Display unit for displaying the optical cable connection information with the plurality of remote devices (121, 122, 123) and the remote device (121, 122, 123) or the central processing unit 110 of the front and rear ends of the central processing unit 110, respectively 110a, 121a, 122a, and 123a are provided.

The plurality of

remote devices

121, 122, and 123 include a distribution automation terminal, a remote meter reading terminal, a load management terminal, and the like. In addition, it can be a factory automation terminal, a terminal for pole and underground transformation, a power line communication device, a wireless internet device, and the like, and can also be used in various fields such as voice call, CCTV, and LED display board. have. The

remote devices

121, 122, and 123 may be widely applied to a general device configured as an optical communication network in addition to those illustrated.

The central processing unit 110 controls the optical Ethernet signals provided to the plurality of

remote devices

121, 122, 123, and performs a switching operation when the optical cable connection between the plurality of

remote devices

121, 122, 123 is wrong. . At this time, the central processing unit 110 means a central office terminal (COT) device, a description of the structure of the COT device will be described with reference to FIG. In addition, the central processing unit 110 further includes an optical signal changing means (not shown) to convert the Ethernet signal and the optical Ethernet signal. Here, the Ethernet signal may include an RS-232 asynchronous signal, a voice IP signal (VoIP), an image signal or data of 1200 bps to 57.6 kbps.

The central processing unit 110 receives various server data coming into the network as an Ethernet frame of TCP / IP (Transmission Control Protocol / Internet Protocol), and reconfigures it in the central processing unit 110 according to a service to receive an optical signal. Convert to Here, the optical signal may be converted into a TCP / IP frame having a transmission width of the 100base-FX (100Mbps) or 1000Base-Fx (1Gbps) band. The converted TCP / IP frame then physically passes data through an electronic to optical to a dualized ring configuration.

The central processing unit 110 uses a different method from the SDH series system applied to the existing annular network system, and is applied to the annular network system using general Ethernet. In this case, the information transmitted through the Ethernet is not formed a separate channel, but operates with a variable bandwidth (at least 64Bype ~ huge frame (1916Byte), and up to jumbo packets).

The first optical core networks ET to ER and the second optical core networks WT to WR are connected to the central processing unit 110 from the central processing unit 110 via the plurality of

remote devices

121, 122, and 123. Each ring structure has a ring structure such that optical data is transmitted in a first direction 910 and a second direction 920 opposite to each other through the working line or the protection line. The first optical core networks ET to ER start from the central processing unit 110 and go back to the central processing unit 110 through the respective

remote devices

121, 122, and 123 to form a ring structure. . The second optical core networks WT to WR also form a ring structure through the central processing unit 110 and the respective

remote devices

123, 122, and 121. As a result, the first optical core networks ET to ER and the second optical core networks WT to WR form a dual ring structure with the central processing unit 110 and the

remote devices

121, 122, and 123. do.

The first optical core networks ET ˜ER transmit data converted into an optical signal only in the first direction 910, and in the second optical core networks WT WR and the first direction 910. Only the second direction 920 in the opposite direction carries the data. Only when the first optical core networks ET to ER and the second optical core networks WT to WR transfer data in opposite directions, a partial ring configuration is possible when switching later. The first optical core network (ET ~ ER) and the second optical core network (WT ~ WR) and the remote devices (121, 122, 123) is composed of a plug-in (Plug In) method has excellent expandability As a result, the unit can be easily added.

Meanwhile, in the case of the existing Ethernet transmission system, in order to perform data communication from one point to another point, transmission and reception are performed through one line that must be transmitted in the received line direction. For example, transmission and reception are made in both directions through one line between the central processing unit and the first or last remote device or between each remote device. On the contrary, the present optical Ethernet signal transmission system has a first direction 910 in the first optical core networks ET to ER, and a second direction 920 in the second optical core networks WT to WR. Since data is transmitted / received in different directions from each other, the first optical core networks ET to ER and the second optical core networks WT to WR are configured as rings, thereby transmitting data in one direction. However, data can be transmitted and received from any one point in the network system to another.

In addition, the optical Ethernet signal transmission system uses an asynchronous TCP / IP type Ethernet frame instead of the conventional PDH (Plesiochronous Digital Hierarchy) or SDH (Synchronous Digital Hierarchy) layered equipment configuration, It can be economically constructed without building an additional system. Therefore, the compatibility with the existing system is excellent.

In addition, the front of the plurality of remote devices (121, 122, 123) and the central processing unit 110 and the front end of the plurality of remote devices (121, 122, 123) and the central processing unit (110) and

Display units

110a, 121a, 122a, and 123a for automatically displaying optical cable connection information with a remote device or a central processing unit connected to the rear end are provided. The front surface of the plurality of

remote devices

121, 122, 123 and the central processing unit 110 is provided with a serial interface including a test button (see FIG. 16). The serial interface is connected to the

display unit

110a, 121a, 122a, 123a. When the test button is pressed, the test device for each optical cable line is transmitted to the next node as an asynchronous Ethernet frame. The node may confirm this, check whether the optical data is transmitted and received and the optical cable connection information, and display the information through the

display units

110a, 121a, 122a, and 123a.

In addition, the plurality of remote devices (121, 122, 123) and the front of the central processing unit 110, the optical interface (110b, 121b, 122b, 123b) connected between the nodes, respectively, and Ethernet communication with external equipment Ethernet interface (110c, 121c, 122c, 123c) for performing, and a power supply interface for supplying power (not shown).

In addition, each of the

remote devices

121, 122, and 123 actively detects whether the first optical core networks ET to ER and the second optical core networks WT to WR are physically connected to each other so that the physical connection is performed. Ethernet frame forming an NMS frame including information, transmitting and receiving a control signal using an Inter Packet Gap (IPG) between the packets of the optical Ethernet signal and asynchronous to the optical cable line fault event The central processing unit 110 is transmitted to the central processing unit 110 through the adjacent remote device, and the central processing unit 110 may perform the switching of the plurality of remote devices using the received NMS frame.

In addition, each of the

remote devices

121, 122, and 123 actively detects whether the first optical core networks ET to ER and the second optical core networks WT to WR are physically connected to each other so that the physical connection is performed. The central processing unit 110 and each of the

remote devices

121, 122, and 123 form an NMS frame including information, and a network collision caused by a loop of an Ethernet data packet by an incorrect connection of an optical cable. And to automatically prevent looping of Ethernet data packets to prevent collapse.

To describe the display unit A in more detail, the plurality of LEDs indicate whether optical data from an adjacent

remote device

121, 122, 123 or the central processing unit 110 is received from the corresponding device. The number of

remote devices

121, 122, and 123 connected to the first optical core network ET to ER or the second optical core network WT to WR may be represented in binary form. 121, 122, and 123 may represent the corresponding numbers in the order of connection according to the connection order of the first optical core networks ET to ER or the second optical core networks WT to WR in binary. In this case, the optical cable connection information may be displayed by blinking, on, off, or the like through the LED when the optical cable is incorrectly inserted or disconnected. In the meantime, the description of the display unit A will be described in detail with reference to FIGS. 2A to 4.

FIG. 2A is a diagram illustrating a state of a display unit when a test button of a central processing unit is pressed when an optical cable of an automatic cable connection checking system in the optical Ethernet transmission system having the annular network structure of FIG. 1 is normally connected. FIG. 2B is a view illustrating a state of a display unit when a test button is pressed in a first remote device when an optical cable of an optical cable connection automatic check system in the optical Ethernet transmission system having the annular network structure of FIG. 1 is normally connected; 2C is a view illustrating a state of the display unit when the test button of the second remote device is pressed when the optical cable of the optical cable connection automatic confirmation system of the optical Ethernet transmission system having the annular network structure of FIG. 1 is normally connected. FIG. 2D illustrates an optical network in an optical Ethernet transmission system having the annular network structure of FIG. 1. Block diagram showing a display state in the case of the optical cable of the connection automatically check system lost the test button in the third remote device when a normal connection is pressed. Meanwhile, in FIGS. 2A to 3D, the plurality of

remote devices

121, 122, and 123 are described as a first remote device (RT # 1) 121 and a second remote device (RT # 2) 122 for convenience of description. It will be described as a third remote device (RT # 3) (123).

As shown in FIG. 2A, the display unit when the test button of the central processing unit 110 is pressed when the optical cable of the optical cable connection automatic confirmation system in the optical Ethernet transmission system having the annular network structure is normally connected ( 110a generates line codes of (1) and (5), respectively, in the working line direction (hereinafter referred to as a walking direction) and the protection line direction (hereinafter referred to as a protection direction) in the central processing unit 110. When the first remote device 121 normally receives the line code (1) in the walking direction, the first remote device 121 blinks the EOK LED. In addition, when the first remote device 121 transmits the line code (2) to the second remote device 122 and the second remote device 122 normally receives it, the second remote device 122 transmits an EOK LED. Blinking. In the same way, when the second remote device 122 and the third remote device 123 operate and finally the line code (4) transmitted by the third remote device 123 is normally received by the central processing unit 110. , The central processing unit 110 is to blink the EOK LED. In addition, if the line cord transmitted from the central processing unit 110 in the protection direction operates in the same manner as the operation in the working direction, and a normal optical cable connection is made, the respective

remote devices

121, 122, and 123 turn on the WOK LED. The final processing unit 110 finally blinks the WOK LED when the line code (8) transmitted from the first remote device 121 to the central processing unit 110 is normally received.

As shown in FIG. 2B, when the test button of the first remote device 121 is pressed when the optical cable of the optical cable connection automatic check system in the optical Ethernet transmission system having the annular network structure is normally connected, The first remote device 121 transmits (1) line codes in the protective direction and (3) line codes in the working direction, respectively. In this case, since the optical data is normally received from the first remote device 121 through the line code (1), the display unit 110a of the central processing unit 110 blinks the WOK LED corresponding to (1). do. In addition, since the optical data is normally received from the first remote device 121 via the line code (3), the display unit 122a of the second remote device 122 blinks the EOK LED corresponding to (3). Done. In addition, the central processing unit 110 and the second remote device 122 that normally receives the line code transmits (2) line code and (4) line code to the first remote device 121 in response thereto. do. Since the display unit 121a of the first remote device 121 normally receives optical data from the central processing unit 110 through line code (2), the EOK LED corresponding to (2) is blinked. In addition, since the optical data is normally received from the second remote device 122 via the line code (4) from the second remote device 122, the display unit 121a of the first remote device 121 blinks the WOK LED corresponding to (4). Done.

As shown in FIG. 2C, when the test button of the second remote device 122 is pressed when the optical cable of the optical cable connection automatic confirmation system in the optical Ethernet transmission system having the annular network structure is normally connected, The second remote device 122 transmits (1) line cords in the protective direction and (3) line cords in the working direction, respectively. In this case, since the optical data is normally received from the second remote device 122 through the line code (1) from the second remote device 122, the display unit 121a blinks the WOK LED corresponding to (1). Done. In addition, since the optical data is normally received from the second remote device 122 via the line code (3), the display unit 123a of the third remote device 123 blinks the EOK LED corresponding to (3). Done. In addition, the first remote device 121 and the third remote device 123 that normally receive the line code transmit (2) line code and (4) line code to the second remote device 122 in response thereto. do. Since the display unit 122a of the second remote device 122 normally receives optical data from the first remote device 121 through the line code (2), the EOK LED corresponding to (2) is blinked. In addition, since the optical data is normally received from the third remote device 123 via the line code (4) from the third remote device 123, the display unit 122a blinks the WOK LED corresponding to (4). Will be

As shown in FIG. 2D, when the test button of the third remote device 123 is pressed when the optical cable of the optical cable connection automatic confirmation system in the optical Ethernet transmission system having the annular network structure is normally connected, The third remote device 123 transmits (1) line codes in the protective direction and (3) line codes in the working direction, respectively. In this case, since the optical data is normally received from the third remote device 123 through the line code (1), the display unit 122a of the second remote device 122 blinks the WOK LED corresponding to (1). Done. In addition, since the optical data is normally received from the third remote device 123 via the line code (3), the display unit 110a of the central processing unit 110 blinks the EOK LED corresponding to (3). do. In addition, the second remote device 122 and the central processing unit 110 having normally received the line code transmits (2) line code and (4) line code to the third remote device 123 in response thereto. . The display unit 123a of the third remote device 123 normally receives optical data from the second remote device 122 through the line code (2), thereby blinking the EOK LED corresponding to (2). Further, since the optical data is normally received from the central processing unit 110 via the line code (4) from the central processing unit 110, the display unit 123a of the third remote device 123 causes the WOK LED corresponding to (4) to blink. do

FIG. 3A is a view illustrating a state of a display unit when a test button is pressed in a central processing unit when an optical cable of an optical cable connection automatic confirmation system in the optical Ethernet transmission system having the annular network structure of FIG. 1 is incorrectly connected. 3B is a view illustrating a state of a display unit when a test button is pressed on a first remote device when an optical cable of an optical cable connection automatic confirmation system in the optical Ethernet transmission system having the annular network structure of FIG. 1 is incorrectly connected. 3C is a view showing a state in which the test button is pressed in the second remote device when the optical cable of the optical cable connection automatic confirmation system in the optical Ethernet transmission system having the annular network structure of FIG. 1 is incorrectly connected. 3d is an optical Ethernet transmission system having the annular network structure of FIG. This is a view showing the state of the display unit when the test button of the third remote device is pressed when the optical cable of the system is automatically connected.

As shown in FIG. 3A, when the test button of the central processing unit 110 is pressed when the optical cable of the optical cable connection automatic confirmation system in the optical Ethernet transmission system having the annular network structure is connected incorrectly, The processing apparatus 110 generates line codes of (1) and (3) in the working direction and the protection direction, respectively. At this time, the display unit 121a of the first remote device 121 blinks the EOK LED because the first remote device 121 normally receives the line code (1) in the walking direction. At this time, the first remote device 121 transmits the line code (2) to the second remote device 122. Here, since the optical cable line is in a fault state (for example, the optical cable is disconnected) between the first remote device 121 and the second remote device 122, the second remote device 122 is This is not normally received, the display unit 122a of the second remote device 122 is turned off the EOK LED. In addition, since the optical cable is not connected between the second remote device 122 and the third remote device 123, the display unit 123a of the third remote device 123 also turns off the EOK LED. Therefore, since the third remote device 123 does not receive the line code from the second remote device 122 and does not transmit the line code to the central processing unit 110, the display unit of the central processing unit 110 ( 110a) turns off the EOK LED. In addition, the central processing unit 110 transmits the optical data to the third remote device 123 by the line code (3) in the protection direction, but the third remote device 123 is not connected because the optical cable is abnormally connected. Therefore, the display unit 123a of the third remote device 123 turns off the WOK LED. At this time, the line code (5) of the third remote device 123 is looped to itself so that optical data cannot be transmitted to the second remote device 122. Accordingly, the second remote device 121 and the first remote device 121 do not operate because they do not receive optical data in the protection direction, and the display unit 110a of the central device 110 turns off the WOK LED.

As shown in FIG. 3B, the test button of the first remote device 121 may be pressed when the optical cable of the optical cable connection automatic check system in the optical Ethernet transmission system having the annular network structure of FIG. 3A is incorrectly connected. In this case, the first remote device 121 transmits (1) the line code to the working line and (3) the line code in the protection direction. In this case, since the optical data is normally received from the first remote device 121 through the line code (1), the display unit 110a of the central processing unit 110 blinks the WOK LED corresponding to (1). do. In addition, since the display unit 122a of the second remote device 122 does not normally receive optical data from the first remote device 121 with the line code (3), the EOK LED corresponding to (3) is turned off. Done. Also, if the optical data is normally received by the line code, the central processing unit 110 and the second remote device 122 will respond to it with the line code, respectively. That is, the central processing unit 110 transmits the optical data to the first remote device 121 through the line code (2), so that the display unit 121a of the first remote device 121 blocks the EOK LED. Linking. However, the second remote device cannot (3) receive the optical data with the line code, and thus cannot transmit the optical data to the first remote device 121 through the line code, and thus the display unit of the first remote device 121 121a turns off the WOK LED.

As shown in FIG. 3C, the test button of the second remote device 122 may be pressed when the optical cable of the optical cable connection automatic check system of the optical Ethernet transmission system having the annular network structure of FIG. 3A is incorrectly connected. In this case, the second remote device 122 transmits the optical data with the line code (1) to the first remote device 121 in the working direction, and also with the line code with respect to the second remote device 123 in the protection direction. Send the data. The display unit 121a of the first remote device 121 receiving the optical data from the second remote device 122 by the line code (1) is to blink the WOK LED. In addition, although the first remote device 121 transmits the optical data in the line code (2) in response thereto, since the second remote device 122 does not receive the optical data due to the disconnection of the optical cable, The display unit 122a of the second remote device 122 turns off the EOK LED. In addition, since the optical cable between the second remote device 122 and the third remote device 123 is disconnected to transmit and receive optical data, the display unit 123a of the third remote device 123 turns off the EOK LED. The display unit 122a of the second remote device 122 turns off the WOK LED.

As shown in FIG. 3D, the test button of the third remote device 123 may be pressed when the optical cable of the optical cable connection automatic check system in the optical Ethernet transmission system having the annular network structure of FIG. 3A is incorrectly connected. In this case, the line (1) formed between the third remote device 123 itself has the same optical data reception direction, but since the line code to be entered is wrong, the display unit 123a of the third remote device 123 corresponds to Turn off the WOK LED without blinking. In addition, the display unit 110a of the central processing unit 110 through the line code (2) of the third remote device 123 is to blink the EOK LED, but in response thereto (3) Since the optical data of the line code is wrong, the display unit 123a of the third remote device 123 turns off the WOK LED.

FIG. 4 is a view illustrating a state of a display unit when an optical cable connection is wrong at a position different from the automatic optical cable connection checking system in the optical Ethernet transmission system having the annular network structure of FIGS. 3A to 3D.

As shown in Figure 4, between the central processing unit 110 and the first remote device 121 of the optical cable connection automatic confirmation system in the optical Ethernet transmission system having the annular network structure, and the third remote device 123 and When the line code between the central processing unit 110 and the first remote device 121 and the second remote device 122 and the second remote device 122 and the third remote device 123 is incorrectly connected, 2 When the test button is pressed on the remote device 122, the display unit 122a of the second remote device 121 receives (2) the line code through the ER in the other direction and does not blink the corresponding WOK LED. In the off state, (4) the line code is received by the WR in the other direction and the corresponding EOK LED is in the off state without blinking. In addition, the display unit 121a of the first remote device 121 adjacent in the protective direction receives the line code (1) of the second remote device 122 in the ER in the other direction, and the corresponding WOK LED is blinking. It is turned off. In addition, the display unit 123a of the third remote device 123 adjacent in the walking direction receives the line code (3) of the second remote device 122 in the WR in the other direction and does not block the corresponding EOK. Will be turned off.

5 to 9 below, an example of an automatic optical cable connection checking system in an optical Ethernet transmission system having an annular network structure in which six plurality of remote devices are installed is used as an example. The flow will be described. 5 to 9 schematically illustrate the structures of the plurality of remote devices and the central processing device in a circular shape for convenience of description.

FIG. 5 is a diagram illustrating an optical Ethernet signal transmission flow in a normal state in an automatic optical cable connection confirmation system in an optical Ethernet transmission system having an annular network structure according to the present invention.

Both the first optical core network and the second optical core network maintain a normal communication state, and at this time, an optical Ethernet signal is transmitted through the first optical core network. As shown in FIG. 5, the flow of data 910 in this case coincides with the first direction.

FIG. 6 is a schematic diagram illustrating a data flow when an error occurs in a second optical core network of an automatic cable connection checking system in an optical Ethernet transmission system having an annular network structure according to the present invention.

As shown in FIG. 6, when an abnormality occurs in the second optical core network between the third remote device 123 and the fourth remote device 124, the data flow in the first direction which is a general data flow direction. Since there is no problem at 910, data is transmitted using the first optical core network in a first direction such as the flow of an optical Ethernet signal in a general state.

FIG. 7 is a schematic diagram illustrating a data flow 920 when an error occurs in a first optical core network of a system for automatically checking a connection of an optical cable in an optical Ethernet transmission system having an annular network structure according to the present invention.

As shown in FIG. 7, when an error occurs in a part of the first optical core network existing in the second remote apparatus 122 and the third remote apparatus 123, the first optical core network is connected to the first optical core network. Since the entire loop cannot be formed, data is transmitted in the second direction through the second optical core network (920). In this case, the central unit 110 detects an abnormality of the first optical core network in the first direction in hardware and performs a transfer to transfer data through the second optical core network immediately, and other software control. It is possible to switch in a very short time because there is no. In the optical Ethernet signal transmission system, switching is controlled by hardware using a field-programmable gate array (FPGA). In case of Ethernet switching by existing software, control signals for switching are carried on the real traffic and transmitted, and switching is performed by using a separate resource in a computer in charge of the control to control the switching. Therefore, when the transfer is performed by the existing software method, recovery through the transfer takes hundreds of milliseconds (ms), and when a company-specific software technique is used to connect to the upper network, a lot of added routers, etc. are added. There is a disadvantage that requires additional equipment. On the contrary, since the optical Ethernet signal transmission system performs Ethernet switching in hardware, it is compatible with general Ethernet equipment without using resources on a separate system and can be used as existing equipment. In addition, since the switchover is performed by hardware, it is possible to transfer reliable data within 128 microseconds (us) between nodes to determine the abnormality of the network and recover after the network transfer.

In addition, by transmitting the control signals used in the transfer in the inter packet gap (IPG), the actual data is transmitted to more than about 99% of the packet compared to the conventional method that always used a certain portion of the packet Can be used to

As mentioned above, in the conventional system, since control signals are carried on a packet, when the control signals accumulate or become complicated, many control signals are placed on a packet that must carry actual data. Therefore, the actual traffic data amount is significantly reduced. However, in the present optical Ethernet signal transmission system, the actual traffic loss can be remarkably reduced by loading a control signal in a minimum Ethernet packet and transmitting a minimum packet asynchronously to the event. For example, for a 100 Mbyte redundant optical communication ring, the actual Ethernet transport traffic capacity is 99% or more, that is, 99 Mbyte or more.

8 is a schematic diagram illustrating the flow of data when an abnormality occurs simultaneously in the first and second optical core networks of the optical cable connection automatic confirmation system in the optical Ethernet transmission system having the annular network structure according to the present invention.

As illustrated in FIG. 8, when the first optical core network and the second optical core network have abnormalities simultaneously between the third remote device 123 and the fourth remote device 124, the central device may be used. The first remote device 121, the second remote device 122, and the third remote device 123 in the first direction from the 110 to the first optical core network; The third remote device 123, the second remote device 122, the first remote device 121 and the central device 110 in the second direction through a part of the second optical core network in the second loop as a whole loop The three optical core network 930 is configured.

Similarly, the sixth remote device 126, the fifth remote device 125, and the fourth remote device 124 may be started using the part of the second optical core network in the second direction starting from the central device 110. And then the entire loop using a portion of the first optical core network in the order of the fourth remote device 124, the fifth remote device 125, the sixth remote device 126 and the central device 110 in that order. The fourth optical core network 940 is formed.

Therefore, even if an abnormality occurs in the connection between the third remote device 123 and the fourth remote device 124, all of the

remote devices

121, 122, 123, 124, 125, 126 through this transfer. Maintain network connected devices.

9 is a schematic diagram illustrating the flow of data when an abnormality occurs simultaneously in the first and second optical core networks of the optical cable connection automatic confirmation system in the optical Ethernet transmission system having the annular network structure according to the present invention.

As illustrated in FIG. 9, unlike the structure of the network illustrated in FIG. 8, when a portion in which an abnormality occurs between the first optical core network and the second optical core network is generated apart from each other, the connection portion may be connected to the portion of FIG. 8. As in the case, the third optical core network 930 and the fourth optical core network 940 are configured, and a fifth optical core network 950 is formed by forming a loop between remote devices separated from each other. In this case, the third optical core network connects the first remote device 121 and the second remote device 122 in a first direction from the central device 110 using a part of the first optical core, Subsequently, the second remote device 122, the first remote device 121, and the central device 110 are configured using a part of the second optical core network in the second direction. Similarly to the case of FIG. 8, the fourth optical core network also includes the central unit 110, the sixth remote unit 126, the fifth remote unit 125, and again the sixth remote unit 126 and the central unit 110. If the connection between the third remote device 123 and the fourth remote device 124 is good, Ethernet data communication between the third remote device 123 and the fourth remote device 124 is possible. .

On the other hand, if an optical cable breaks or a fault occurs, it is basically represented by ELF / WLF or ERF / WRF LED. However, since the transmission and reception of the optical data is good, but the connection without considering the direction is the same as that of the optical connection is broken, the ELF or WLF is blinked so that the installer can recognize it.

10a and 10b are shown between the central processing unit 110 and the first remote device 121 of the optical cable connection automatic confirmation system in the optical Ethernet transmission system having an annular network structure according to the present invention, the first remote device 121 and FIG. 11 is a view showing the states of the

display units

121a and 122a when the optical cable is incorrectly connected between the second remote devices 122. FIG.

As shown in FIG. 10A, when the optical cable is incorrectly connected between the central processing unit 110 and the first remote device 121 and between the first remote device 121 and the second remote device 122, Each node of the central processing unit 110 and the first to third

remote devices

121, 122, and 123 exchanges line codes with each other in a working direction or a protection direction. At this time, the first remote device 121 is sent ET line code toward the central processing unit 110, the WT line code is sent to the second remote device 122. The central processing unit 110 should be a WT line code coming from the first remote device 121, but the ET is actually wrong, and the corresponding WLF is blinking. In addition, the central processing unit 110 sends the ET line code to the first remote device 121 in response thereto. In addition, the first remote device 121 is normally received by the ER to turn off the ELF. At this time, since the WT line code sent from the first remote device 121 to the second remote device 122 is received as the ER by the second remote device 122, the second remote device 122 receives the ELF. Blinking, and sends a WT line code to the first remote device 121 in response. In addition, since the first remote device 121 receives the WR, the WLF is turned off.

On the other hand, in the normal optical cable connection configuration of Figure 10a FX2 (ET and WR) should be connected to FX1 (ER and WT).

As shown in FIG. 10B, when the connection of the optical cable between the central processing unit 110 and the first remote device 121 and the first remote device 121 and the second remote device 122 is incorrect, Each node of the central processing unit 110 and the first to third

remote devices

121, 122, and 123 exchanges line codes with each other in a working direction or a protection direction. At this time, the first remote device 121 sends the ET line code toward the second remote device 122, the WT line code is sent to the central processing unit (110). In addition, since the central processing unit 110 receives the line code coming from the first remote device 121 and is normally received from the WT, the central processing unit 110 turns off the WLF. Send the ET line code to the remote device 121. At this time, the first remote device 121 is received by the WR to blink the WLF. In addition, since the ET line code sent from the first remote device 121 to the second remote device 122 is received by the second remote device 122 as the ER, the second remote device 122 turns off the ELF. In response, the second remote device 122 sends the WT line code to the first remote device 121. In addition, since the first remote device 121 receives the ER, the first remote device 121 blinks the ELF.

On the other hand, in the normal optical cable connection configuration of Figure 10b FX2 (ET and WR) should be connected to FX1 (ER and WT).

FIG. 11 is a view illustrating a connection of an optical cable between a first remote device and a second remote device, a second remote device, and a third remote device in an optical cable connection automatic confirmation system in an optical Ethernet transmission system having an annular network structure according to the present invention. It is a figure which shows the state of a display part in case of a mistake.

As shown in FIG. 11, when the connection of the optical cable between the first remote device 121 and the second remote device 122 and the second remote device 122 and the third remote device 123 is incorrect. Each node of the central processing unit 110 and the first to third

remote devices

121, 122, and 123 exchanges line codes with each other in a working direction or a protection direction. At this time, the second remote device 122 sends the ET line code toward the first remote device 121, and sends the WT line code toward the third remote device 123. At this time, since the first remote device 121 receives the ET line code sent from the second remote device 122 in the WR, the first remote device 121 blinks the WLF and, in response, ETs the second remote device 122 to the second remote device 122. Send the line code. Accordingly, the second remote device 122 is received by the WR to cause the WLF to blink. At this time, since the WT line code sent from the second remote device 122 to the third remote device 123 is received by the third remote device 123 as an ER, the third remote device 123 blocks the ELF. The third remote device 123 sends a WT line code to the second remote device 122 in response thereto. Therefore, since the second remote device 122 receives the ER, it will blink the ELF.

Meanwhile, in the normal optical cable connection configuration of FIG. 11, FX2 (ET and WR) should be connected to FX1 (ER and WT).

12 is a cross-sectional view between a central processing unit and a first remote device, a first remote device and a second remote device, and a second remote device of an automatic cable connection confirmation system in an optical Ethernet transmission system having an annular network structure according to the present invention. FIG. 11 is a diagram showing the state of the display unit when the optical cable is incorrectly connected between the third remote device and the third remote device and the central processing unit.

As shown in Figure 12, between the central processing unit 110 and the first remote device 121 of the optical cable connection automatic confirmation system in the optical Ethernet transmission system having an annular network structure according to the present invention, the first remote device ( 121, the connection of the optical cable between the second remote device 122, between the second remote device 122 and the third remote device 123, between the third remote device 123 and the central processing unit 110 is incorrect In this case, the nodes of the central processing unit 110 and the first to third

remote devices

121, 122, and 123 first exchange line codes with each other in the working direction or the protection direction. At this time, the first remote device 121 sends the ET line code toward the central processing unit 110, and the WT line code toward the second remote device 122.

Since the central processing unit 110 is the line code coming from the first remote device 121 should be WT coming from the ET, the WLF is blinking, in response to the ET line to the first remote device 121 Send the code. At this time, the first remote device 121 is received by the WR and the ELF is blinking.

In addition, the second remote device 122 transmits the WT line code toward the first remote device 121 and the ET line code toward the third remote device 123. At this time, since the second remote device 122 receives the WT line code sent from the first remote device 121 to the ER, the second remote device 122 blinks the ELF and, in response, WT toward the first remote device 121. Send the line code. In addition, when the second remote device 122 is disconnected from the optical cable and the third remote device 123, the WLF is turned on because it is not normally received by the WR.

In addition, the third remote device 123 sends the ET line code toward the second remote device 122, and sends the WT line code toward the central processing unit 110. In this case, when the optical cable is disconnected from the second remote device 122, the third remote device 123 is not normally received by the WR, so that the WLF is turned on. In addition, since the third remote device 123 receives the WT line code from the central processing unit 110 as the ER, the third remote device 123 blinks the ELF, and in response, the third remote device 123 receives the WT line code toward the central processing unit 110. Ship to In this case, since the central processing unit 110 receives the WT line code from the third remote device 123 to the ER, the central processing unit 110 blinks the ELF.

13 is a view showing a state of the display unit when the connection of the optical cable between the central processing unit and the third remote device of the automatic check system for optical cable connection in the optical Ethernet transmission system having an annular network structure according to the present invention.

As shown in FIG. 13, when the connection of the optical cable between the central processing unit 110 and the third remote device 123 is wrong, the WT of the third remote device 123 is looped to WR, so that The display unit 123a of the third remote device 123 recognizes this and blinks the WLF. In addition, the central processing unit 110, since the ET is connected to the central processing unit 110 by the ER in the third remote device 123, the ELF is OFF, in response to the central processing unit 110 WT The line code is sent to the third remote device 123. At this time, the third remote device 123 receives the ER and blinks the ELF.

FIG. 14 is a view illustrating a display unit of a remote device representing a position of a remote device constituting an automatic checking system for connecting an optical cable in an optical Ethernet transmission system having a ring network structure according to the present invention, and FIG. 15 is a ring shape according to the present invention. FIG. 16 is a view showing an example of a display unit of a central processing unit expressing the number of remote devices constituting the automatic checking of optical cable connection in an optical Ethernet transmission system having a network structure, and FIG. 16 has an annular network structure according to the present invention. Automatic display of optical cable connections in an optical Ethernet transmission system. A diagram illustrating a display unit and a serial interface installed at a front surface of a remote device and a central processing unit.

As shown in FIG. 14, the display unit of the remote device constituting the automatic checking of the optical cable connection in the optical Ethernet transmission system having the annular network structure may represent the position of the remote device on the ring network of the system in binary. For example, if the number of remote devices is six, the display unit blinks the PWR LED indicating power supply, and the front display LEDs of all the

remote devices

121, 122, 123, 124, 125, and 126, In order to represent the number on the ring network in binary format, it can be turned on to indicate its number, and in the case of the central unit, the number of nodes on the ring network is represented in binary format.

In addition, as shown in FIG. 15, the central processing unit 110 displays the total number of remote devices connected in the ring network in binary.

Therefore, according to the optical cable connection automatic check system in the optical Ethernet transmission system having the annular network structure, when a large number of nodes are connected in the optical core network, if a node fails, the user can easily find the node in the field. It becomes possible. In addition, through the automatic recognition function by the plug-in-play method when adding and deleting nodes in the ring network, the entire node can be actively set by viewing the assigned number of nodes. User convenience can be maximized during maintenance.

17 is a schematic diagram illustrating a central office terminal (COT) of an optical Ethernet signal transmission system according to the present invention.

The central office terminal (COT) may include a Main Processor Unit (MPU) 112, an Ethernet Transmission & Receive (ETR) 113, and a Power 111. The MPU 112 functions to initialize the system and to control and monitor each module and remote device in the central unit. It also controls, configures and backs up data for central and remote devices. In this case, the power 111 may be configured in redundancy.

As described above, according to the optical cable connection automatic confirmation system in the optical Ethernet transmission system having the annular network structure, the connection state of the optical cable constituting the optical communication network is not displayed on the front of the remote device and the central processing unit without any additional equipment. It can be checked automatically through the installed display. In addition, according to the present optical Ethernet signaling system, since a control signal is transmitted and received in an inter packet gap (IPG) and transmitted to each node in an asynchronous Ethernet frame with respect to an optical cable line fault event, it is controlled in a packet. Unlike the method used including information, more than 99% of packets can be used for data transmission and data communication efficiency can be maximized.

As such, the technical configuration of the present invention described above will be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the exemplary embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims rather than the detailed description, and the meaning and scope of the claims and their All changes or modifications derived from equivalent concepts should be construed as being included in the scope of the present invention.

Claims

A plurality of remote devices connected by optical cables each consisting of a working line and a protection line;

A central processing unit controlling the optical Ethernet signals provided to the plurality of remote devices and performing a switching operation when the optical cable connection between the plurality of remote devices or the central device is wrong; And

A duplicated first optical core network through which the optical data is transmitted from the central processing unit through the plurality of remote devices to the central processing unit via the working line or the protection line in a second direction opposite to the first direction and the opposite direction; A second optical core network;

A display unit for automatically displaying optical cable connection information between the plurality of remote devices and the central processing device and the remote devices or central processing devices connected to the front and rear ends of the plurality of remote devices and the central processing device; In the optical Ethernet transmission system having an annular network structure is connected to the display unit is provided with a serial interface including a test button for checking the optical data transmission and reception and optical cable connection information using an asynchronous Ethernet frame is installed. Automatic connection system of optical cable.
The method of claim 1,

The plurality of remote devices and the central processing unit automatically detects the optical cable connection information that is actively generated, and automatically displays the optical cable connection in the optical Ethernet transmission system having an annular network structure, characterized in that it can be displayed on the front display automatically. system.
The method of claim 1,

In the serial interface, when the test button is pressed, TPG (Test Patten Generator) for each optical cable line is transmitted to the next node as an asynchronous Ethernet frame to the corresponding remote device, and the node confirms this and transmits and receives optical data and connects the optical cable. Automatic checking of the optical cable connection in the optical Ethernet transmission system having an annular network structure characterized in that to check the information to display on the display.
The method according to claim 1 or 2,

The display unit is composed of a plurality of LEDs, the plurality of LEDs is an optical Ethernet transmission system having an annular network structure, characterized in that indicating whether the optical data from the adjacent remote device or the central processing unit to the corresponding device is received. Automatic cable connection check system
The method of claim 1,

The display unit may include a plurality of LEDs, and the plurality of LEDs may represent a number of remote devices connected to the first optical core network or the second optical core network in binary format. Automatic connection system of optical cable in optical Ethernet transmission system.
The method of claim 4, wherein

The display unit may include a plurality of LEDs, and the plurality of LEDs may be represented in binary format, in which a corresponding device is connected in the order of connection of the first optical core network or the second optical core network. Automatic connection system of optical cable in optical Ethernet transmission system with network structure.
The method of claim 1,

Each remote device actively detects whether the first optical core network and the second optical core network are physically connected to form an NMS frame including the physical connection information.

The NMS frame transmits and receives a control signal using an inter packet gap (IPG) between the packets of the optical Ethernet signal, and the central processing unit through the adjacent remote device in an Ethernet frame asynchronous to the optical cable line fault. Forward to

The central processing unit automatically checks the optical cable connection in the optical Ethernet transmission system having an annular network structure, characterized in that for performing the switching of a plurality of remote devices using the received NMS frame.
The method of claim 1,

Each remote device actively detects whether the first optical core network and the second optical core network are physically connected to form an NMS frame including the physical connection information.

The central processing unit and each of the remote devices may transmit asynchronous network management data between the packets of the optical Ethernet signal to prevent collisions and collapses of the network caused by loops of the Ethernet data packets caused by the connection of the wrong optical cable. Automatic connection system for optical cables in an optical Ethernet transmission system having an annular network structure, by inserting into an inter packet gap (IPG) present in the network to automatically exchange loops of Ethernet data packets. .
The method of claim 1,

The central processing unit and the plurality of remote devices, including a field programmable gate array (FPGA), operate independently without being associated with a separate central processing unit and operate independently of the first optical core network and the second optical core network. Automatic checking of the optical cable connection in the optical Ethernet transmission system having an annular network structure, characterized in that for performing the switching of.
The method of claim 1,

The plurality of remote devices are configured in a plug-in manner so that each of the remote devices is connected to the first optical core network and the second optical core network. Confirmation system.