KR100711457B1 - Optical module device and optical network terminal using the optical module device - Google Patents

Abstract

The present invention discloses an optical network device and a modular optical conversion function device.

Modular optical conversion function device of the present invention includes a power failure detection unit for outputting a power-on reset signal when a power failure is applied through the connector; A load switch unit receiving power through the connector and selectively outputting power applied according to the power-on reset signal; A charging unit for charging the output power of the load switch unit to supply the operating power of the optical conversion function device; A failure generation signal generator for generating and outputting a failure occurrence signal when the power-on reset signal is activated; And a signal transmitting / receiving unit for optically converting the fault occurrence signal and transmitting the optical signal to the optical fiber terminator, and detecting an abnormality in power supply or detachment of the optical conversion function device having a long detachable form and notifying the OLT by detecting it. It enables the system operator to identify the cause of the failure more accurately, so that the system maintenance can be more efficient.

Description

Optical module device and optical network terminal using the optical module device

1 is a block diagram showing a configuration of an optical network device according to the present invention.

2 is a circuit diagram illustrating a circuit structure for detecting whether a light conversion function device is detached from a fault generating signal generator.

FIG. 3 is an internal flowchart illustrating a process of notifying the OLT by detecting a power failure and detachment of the power conversion device in FIG. 1.

4 is a diagram showing a specification for a data packet of a failure signal according to the present invention;

The present invention relates to an optical network terminal (ONT: Optical Network Terminal) for the FTTH service, and more specifically, an optical conversion function device for interfacing with an optical line terminal (OLT: Optical Line Terminal) on the side of the country is composed of an independent module. In the optical network device formed in the form that can be attached and detached from the optical network device, if the optical conversion function device abnormalities can be more accurately detect the cause and transmit the fact to the OLT and the optical network device using the same It is about.

Recently, various types of Internet terminals have been diversified, and as service terminals with high sensitivity such as remote meter reading, VoIP (Internet phone call), and telemedicine are connected to the Internet, as well as simple Internet access using a PC, a telecommunication service provider The need to accurately understand network conditions is increasing rapidly. Among these, especially in the gateway device installed by the service provider in the home or the office of the subscriber, the function of urgently reporting the power supply or the detachment of the communication module to the converging device of the service provider becomes increasingly important.

For example, subscribers often unplug the subscriber gateway device, such as a home gateway, to reduce power consumption. It will be recognized as a link failure. Alternatively, when the communication module of the home gateway is detachable to make various communication methods such as DSL, AON optical transmission, and PON optical transmission by changing only the communication module, when the field technician pulls out the communication module of the gateway, In a network management system, there is a problem that this situation is recognized as a communication failure, more specifically, a link failure.

Therefore, distinguishing between real communication failure and power removal or physical detachment by the subscriber is one of the most basic foundations for understanding the network situation in the subscriber's home. That is, it should be able to urgently report that the communication module is disconnected from the main body after the power is turned off or the communication module is disconnected from the main body.

However, currently implemented ONT terminals are installed in the home, there is no function to detect the failure of the ONT terminal and to identify and report the exact details. For example, it is not possible to distinguish whether the ONT is connected or not, in case of a failure, whether it is a handicap of the ONT or a power cut or a disconnection of the optical core.

In addition, since the subscriber gateway device is installed in a large number of subscriber stages, there is a problem in that the implementation of such an emergency reporting function is not only severely constrained in terms of manufacturing cost but also generates a separate burden in terms of maintenance. have. For example, the way in which a communication module has its own spare battery is difficult to use because it can increase costs and incur huge maintenance costs.

Accordingly, an object of the present invention for solving the above-mentioned problems is to improve the structure of the subscriber gateway device to more efficiently and economically detect and report whether the user is powered off or the module is detached and not the real link failure. It is.

Modular optical conversion function device of the present invention for achieving the above object is a power failure detection unit for outputting a power-on reset signal when an abnormality of the power applied through the connector; A load switch unit receiving power through the connector and selectively outputting power applied according to the power-on reset signal; A charging unit charging the output power of the load switch unit to supply the operating power of the optical conversion function device; A failure generation signal generator for generating and outputting a failure occurrence signal when the power-on reset signal is activated; And a signal transmitter / receiver for optically converting the fault occurrence signal and transmitting the optical signal to the optical fiber terminator.

An optical network device of the present invention comprises: an optical conversion function device for converting and outputting an optical signal from an optical fiber terminal device and converting data from service terminals into an optical signal and transmitting the optical signal to the optical fiber terminal device; And an optically detachable connector connected to the optical conversion function device. The output signal of the optical conversion function device applied through the connector is processed according to a service type to be transmitted to the corresponding service terminal and the signal from the service terminal is transmitted. And an ONT main board for transmitting to the optical conversion function device through a connector, wherein the optical conversion function device detects a power failure or detachment of the connector to notify the optical fiber terminator.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

1 is a block diagram showing the configuration of an optical network device 200 according to the present invention. 1 illustrates only one ONT 200 and an OLT 100 according to the present invention among a plurality of ONTs corresponding to the OLT 100.

The OLT 100 is connected to a broadband network (WAN) and is installed at the national company side to convert data to be transmitted to each service terminal (not shown) into an optical signal (downward signal) and transmit it to the ONT 200, and service The signal (uplink signal) from the terminal is received as an optical signal through the ONT 200 and transmitted to the corresponding broadband network (WAN).

The ONT 200 converts the optical signal provided from the OLT 100 into an electrical signal, demodulates the data signal, and transmits the demodulated data signal to each service terminal for each service type. The data signal from the service terminal is converted into a modulation and optical signal and transmitted to the OLT 100. In particular, the ONT 200 of the present invention is physically connected to the OLT 100 through a transmission medium (optical cable), and converts the optical signal from the OLT 100 into an electrical signal and delivers it to the MAC (Media Access Control) layer. The optical conversion function device 210 converts an electrical signal from the MAC layer into an optical signal and transmits the optical signal to a transmission medium (optical cable), which is configured as an independent module and is detachable to the ONT 200. Hereinafter, the remaining functions except for the optical conversion function device 210 in the ONT 200 will be referred to as an ONT main board 220, and the optical conversion function device 210 and the ONT main board 220 will be referred to as the universal interface connector 230. Leads to.

In the present invention, when the optical conversion function device 210 is configured independently of the ONT main board 220 in the ONT 200 and is formed in a modular form that can be detachably attached to the ONT 200, the optical conversion function device 210 ) To detect whether or not the power supply abnormalities and the mounting or detached to the OLT (100) is characterized in that the fact. That is, when the OLT 100 is notified of the failure from the ONT 200, it is more efficient to find out whether it is due to a real link failure or a power failure or detachment of the optical conversion function. It can be characterized by.

At this time, since the function of the ONT main board 220 is the same or similar to the function for processing data transmitted and converted between the subscriber station and the OLT 200 by processing the optical conversion signal in the conventional ONT, in the following description The detailed description of the operation of the board 220 will be omitted and the focus will be given on the operation and configuration of the light conversion function device 210.

The optical conversion function device 210 of FIG. 1 includes a power abnormality detection unit 211, a load switch unit 212, a charging unit 213, a failure generation signal generation unit 214, a physical layer processing unit 215, and an optical conversion unit. 216 is provided.

The power abnormality detecting unit 211 detects an abnormality of the power supplied from the ONT main board 220 and transmits a power detecting signal to the load switch unit 212 and the failure generation signal generating unit 214 indicating the abnormality. do. The power supply abnormality detection unit 211 receives power of 5V and 12V from the ONT motherboard 220 through the universal interface connector 230, and uses 5V power as the main power and 12V power as a preset reference voltage (eg, 1.25V) to check whether the branched power supply falls below the reference voltage to determine whether the input power supply is abnormal. The power supply abnormality detection unit 211 generates a power on reset signal when a failure occurs in the power input of 5V and normal operation is difficult, and a branched power supply below the reference voltage occurs due to a failure in the power input of 12V. When lowered to, it generates a power fail signal. At this time, the power fail signal is configured to be applied to the manual reset input of the power failure detection unit 211. Therefore, when an abnormality occurs in any one of the 5V input power source and the 12V input power source, a power-on reset signal is generated eventually. The power-on reset signal is a power detection signal indicating whether there is an abnormal power supply. The generation signal generator 214 is transmitted.

The load switch unit 212 receives power from the ONT main board 220 through the universal interface connector 230 and selectively sends the light switch function to the light conversion function device 210 according to the power-on reset signal of the power abnormality detecting unit 210. Supply the operating power. That is, the load switch unit 212 is a power-on reset signal from the power failure detection unit 210 when the light conversion function device 210 is mounted on the ONT main board 220 to receive power from the ONT main board 220. If it is detected whether the normal state (power-on reset signal is inactive) is turned on to supply power to the light conversion function device 210. At this time, the output voltage of the load switch unit 212 is supplied to each component of the light conversion function device 210 via the charging unit 213.

That is, the charging unit 213 is charged by the output voltage of the load switch unit 212 while the power is stabilized, and then, from the ONT main board 220 due to a power failure or detachment of the optical conversion function device 210. If the power supply is cut off (power-on reset signal is activated), the failure generation signal generator 214 in the optical conversion function device 210, the physical layer for a time sufficient to notify the OLT 200 of the occurrence of the failure. Power is supplied to the processing unit 215 and the light conversion unit 216. A capacitor is used as the charging unit 213, and the capacity of the capacitor is 1000 kV for the output terminal of 12V and 2200 for the output terminal of 5V so as to maintain 5 V (about 700 mA) and 12 V (600 mA) for about 10 ms, respectively. Install a high capacity of about ..

The failure generation signal generator 214 may output the MII (Media Independent Interface) signal and the optical signal from the ONT main board 220 depending on whether the power conversion function device 210 is abnormal in power and detached from the ONT main board 220. The MII signal for notifying the OLT 200 is selectively transmitted to the physical layer processor 215 among the fault occurrence signals generated in the conversion function device 210. That is, when the optical conversion function device 210 is normally connected to the ONT main board 220 and the power supply is stable, the fault generation signal generator 214 may use the ONT main board (eg, the universal interface connector 230). The MII signal is received from the Media Access Control (MAC) (not shown) of the 220 and transmitted to the physical layer processor 215, and the MII signal from the physical layer processor 215 is transmitted to the MAC of the ONT motherboard 220. do. Table 1 shows the MII specification specified in the IEEE.

However, the failure generation signal generator 214 detects a power-on reset signal generated from the power supply abnormality detection unit 211 or when the optical conversion function device 210 is detached from the ONT main board 220, thereby detecting a predefined failure. The MII signal corresponding to the generated signal is transmitted to the physical layer processor 215. When a failure occurs, the failure generation signal generator 214 is operated by the power charged in the charging unit 213.

The physical layer processor 215 manages a physical connection state with the OLT 200, converts the MII signal from the fault generating signal generator 214 into an electrical signal, and transmits it to the light converter 216. The electrical signal from 216 is converted into an MII signal and transmitted to the fault generation signal generator 214.

The optical conversion unit 216 converts the optical signal received from the OLT 200 into an electrical signal through a transmission medium (optical cable), not shown, and transmits the electrical signal to the physical layer processing unit 215 and receives the signal from the physical layer processing unit 215. The electrical signal is converted into an optical signal and transmitted to a transmission medium.

As described above, in the present invention, since the optical conversion function device 210 is configured to be detachable from the ONT main board 220, the operation power is supplied from the ONT main board 220 through the connector 230. It is not necessary to form a separate power supply terminal for the light conversion function device (210). That is, the optical conversion function device 210 and the ONT main board 220 are operated and maintained as a separate device mechanically, but can be installed together with one terminal box by operating as a single device functionally. Since there is no need to provide a separate space for installing the light conversion function device 210 on the subscriber side.

2 is a circuit diagram illustrating a circuit structure of detecting whether a light conversion function device 210 is attached or detached by a fault generating signal generator.

In order to detect detachment, the ONT of the present invention allocates one of the pins of the connector 230 connecting the light conversion function device 210 to the ONT main board 220 as a sensing pin. The other end of the sensing pin is connected to the ground terminal in the ONT main board 220, and the other end of the sensing pin is the input terminal of the fault generating signal generator 214 in the optical conversion function device 210. Together, the sense pin is connected to the supply voltage terminal PWR via a pullup resistor R. At this time, the length of the sensing pin among the pins of the connector 230 is shorter than the length of the other pins so that the optical conversion function device 210 and the ONT main board 220 can be more sensitively detected.

Through the above-described circuit configuration, when the light conversion function device 210 is normally mounted on the ONT main board 220, the detection pin between the light conversion function device 210 and the ONT main board 220 is connected to the light conversion function. The sensing pin of the device 210 is formed of a ground voltage, that is, a low level voltage, by a ground terminal connected from the ONT main board 220. That is, when the light conversion function device 210 is normally mounted, a low level signal is applied to the failure generation signal generator 214.

On the other hand, when the light conversion function device 210 is detached from the ONT main board 220, the connection between the light conversion function device 210 and the ONT main board 220 is cut off of the light conversion function device 210 The sense pin is pulled up by the supply voltage PWR and transitions to a high level. That is, when the light conversion function device 210 is detached, a high level signal is applied to the fault generation signal generator 214.

The failure generation signal generator 214 may detect whether the optical conversion function device 210 is attached or detached through the level of the signal applied through the detection pin.

FIG. 3 is an internal flowchart illustrating a process of notifying the OLT 100 by detecting a power failure or detachment of the power conversion device in FIG. 1.

 When the light conversion function device 210 is mounted on the ONT main board 220 and the power is supplied to the fault generating signal generator 214, the light converting function device 210 is in an initial state and thus the fault generating signal generator 214 is configured with internal logic and After initializing the variables, transition to S1 (NORMAL STATE) state (①).

In the S1 state, the failure generation signal generator 214 transmits the normal packet transmission between the ONT motherboard 220 and the OLT 100 by transmitting the MII signal received from the ONT motherboard 220 to the physical layer processor 215. This makes it possible (②).

When an abnormality occurs in the power applied from the outside while the operation in the S1 state, the power supply power abnormality detection unit 211 detects this to activate the power-on reset signal, and when the power-on reset signal is activated, a failure occurs. The operation state of the signal generator 214 transitions from the S1 state to the S2 (POWER FAULT STATE) state (3).

In the S2 state, the failure generation signal generator 214 blocks the MII signal received from the ONT main board 220 and then outputs the MII signal indicating that an abnormality has occurred in the power supply among the predefined failure occurrence signals. 215 to inform the OLT 100 of the fact (④).

At this time, the load switch unit 212 also turns off the switch by activating the power-on reset signal to block the supply of unstable externally applied power to the light conversion function device 210.

However, since the charging unit 213 is already charged with a certain amount of power, the fault generating signal generator 214 is normally supplied even when a power failure occurs by temporarily receiving power charged in the charging unit 213. OLT 100 can be notified of the occurrence.

Reapplying in the S2 state When the external power is stabilized to the normal state, the power-on reset signal of the power supply abnormality detection unit 211 is deactivated, and thus the operation state of the failure generation signal generator 214 is changed from the S1 state to the S2 state again. (⑤).

When the optical conversion function device 210 is detached in the S1 state, as described above with reference to FIG. 2, the voltage level of the sensing pin connected to the fault generating signal generator 214 transitions from a low level to a high level, thereby causing the fault generating signal generator ( 214 detects this, and accordingly, the operating state transitions from the S2 state to the S3 (EQUIP FAULT STATE) state (6).

In the S3 state, the fault generation signal generator 214 transmits a MII signal indicating the detachment of the optical conversion function device 210 among the predefined fault occurrence signals to the physical layer processing unit 215 and transmits the fact to the OLT 100. (⑦).

When the light conversion function device 210 is detached as in the S3 state, the power supply from the ONT main board 220 is also cut off. However, since the charging unit 213 is already charged with a certain amount of power, the failure generation signal generator 214 temporarily receives the power charged in the charging unit 213 to inform the OLT 100 of the detachment. You will be notified.

In the S3 state, the light conversion function device 210 is mounted on the ONT main board 220 again, and when the power supply is normally performed, the operation state is changed to the S1 state again (⑧).

As in ④ and ⑦ described above, in the present invention, transmitting the fault generating signal to the OLT 100 is not controlled by the operation of a separate software, but detects the occurrence of the fault and simultaneously generates the fault generating signal 214. The predefined data packet generated internally is transmitted immediately.

At this time, the data packet indicating the failure complies with the basic specification of "OpenLink Protocol (IOP)" and consists of 28 bytes as shown in FIG.

The data packet is transmitted to the OLT 100 until the last time that the packet can be transmitted repeatedly without any limit in the number of failures. That is, the transmission time of the data packet is determined according to the capacity of the charging unit 213, the packet transmission is continued until the power supply from the charging unit 213 is finished.

As described above, the optical conversion function device of the present invention is made in the form of a detachable form from the main board, and if the power failure or detachment occurs in the optical conversion function device by notifying the OLT by the system operator is disabled It helps to identify the cause of the occurrence more accurately, making the system more efficient to maintain.

Claims (17)

An optical conversion function unit for photoelectric conversion of a signal transmitted and received with a station-side optical ray termination device among the functional units of the optical network device is configured as an independent module, and is connected to the optical network device through a connector to be detachable to the optical network device. In the light conversion function device, A power failure detector configured to output a power-on reset signal when an abnormality of power applied through the connector occurs; A load switch unit receiving power through the connector and selectively outputting power applied according to the power-on reset signal; A charging unit for charging the output power of the load switch unit to supply the operating power of the optical conversion function device; A fault generating signal generator for generating and outputting a fault generating signal in real time when the power-on reset signal is activated or when the optical conversion function device is detached from the optical network device; And And a signal transmitter / receiver for optically converting the fault occurrence signal to the optical fiber terminating device. The method of claim 1, wherein the power failure detection unit And branching the power supply to a voltage higher than a predetermined reference voltage and comparing the branched voltage with the reference voltage to detect whether an abnormality occurs in the power supply. According to claim 2, wherein the power failure detection unit Modular optical conversion device characterized in that the power supply of 5V and 12V, branching the power supply of 12V. The method of claim 1, wherein the charging unit Modular light conversion function device, characterized in that the capacitor. The method of claim 1, wherein the fault generating signal generating unit When the failure signal is deactivated, the MII signals of data transmitted and received between the service terminal and the optical fiber terminating device are interchanged, and when the failure signal is activated, the MII signal for the predefined failure signal is transmitted to the signal transmitter / receiver. Modular light conversion function device characterized in that the transmission. delete The method of claim 1 , wherein the fault generating signal generating unit Modular light conversion functional device characterized in that the detection of the detachment of the optical conversion function device through the detection pin pulled down when the connector is mounted and the connector is pulled up from the connector pins for long detachable. The method of claim 7, wherein the sensing pin And a shorter than other pins of the connector. The method of claim 1 , wherein the fault generating signal generating unit Modular light conversion function device characterized in that driven by the power supplied to the charging unit when the power supply abnormality and detachment of the light conversion function device. An optical conversion function device that converts and outputs an optical signal from an optical fiber terminal device, converts data from service terminals into an optical signal, and transmits the optical signal to the optical fiber terminal device; And It is connected to the optical conversion function device and the detachable connector, and processes the output signal of the optical conversion function device applied through the connector for each service type and transmits it to the corresponding service terminal and transmits the signal from the service terminal to the connector. It is provided with an ONT main board for transmitting to the optical conversion function device through, The optical conversion function device operates by receiving power from the ONT main board through the connector, and converts a failure signal indicating an occurrence of a failure in the event of power failure or detachment of the connector into an optical signal to convert the optical signal to the optical fiber termination device. Optical network device, characterized in that for transmitting. The apparatus of claim 10, wherein the light conversion functional device is A power abnormality detector receiving power from the ONT main board and outputting a power-on reset signal when an abnormality of the power occurs; A load switch unit receiving power from the ONT main board and selectively outputting power according to the power-on reset signal; A charging unit for charging the output power of the load switch unit to supply the operating power of the optical conversion function device; A failure generation signal generator for generating and outputting a failure occurrence signal when the connector is detached or when the power-on reset signal is activated; And And a signal transmitter / receiver for optically converting the fault occurrence signal and transmitting the optical signal to the optical fiber terminal device. The method of claim 11, wherein the power failure detection unit And branching the power supply to a voltage higher than a predetermined reference voltage, and comparing the branched voltage with the reference voltage to detect whether an abnormality occurs in the power supply. The method of claim 11, wherein the charging unit An optical network device, characterized in that the capacitor. The method of claim 11, wherein the fault generating signal generating unit When the failure signal is deactivated, the MII signals of data transmitted and received between the ONT main board and the optical fiber terminating device are interchanged, and when the failure signal is activated, the MII signal for the predefined failure signal is generated. Optical network device, characterized in that for transmitting to the transceiver. The method of claim 11, wherein the fault generating signal generating unit Among the connector pins, the optical network device, characterized in that for detecting the detachment of the optical conversion function device through a detection pin pulled down when the connector is mounted, and pulled up when the connector is detached. The method of claim 15, wherein the sensing pin And shorter than other pins of the connector. The method of claim 11, wherein the fault generating signal generating unit Modular light conversion function device characterized in that driven by the power supplied to the charging unit when the power supply abnormality and detachment of the light conversion function device.

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