KR101637009B1 - Device and system for wavelength division multiplex with synchronization function of ethernet Auto-Negotiation, and method for synchronization using the same - Google Patents

Abstract

A wavelength division multiplexing (WDM) system according to an embodiment of the present invention includes: a plurality of remote user terminals; a remote client port connected to the remote user terminals through Ethernet, and determining a physical access type with the remote user terminals using an auto-negotiation algorithm; a local client portion connected to the remote client port using an optical line, and performing synchronization when auto-negotiation access type information do not correspond to each other; and a plurality of local user terminals connected to the local client port through Ethernet. According to the configuration of the present invention, an Ethernet signal can be transparently transmitted.

Description

TECHNICAL FIELD [0001] The present invention relates to a low-density wavelength division multiplexing (WDM) apparatus and system using an auto-negotiation connection type synchronization function, and a synchronization method using the same,

The present invention relates to a low-density wavelength division multiplexing (WDM) apparatus and system using an automatic-negotiation connection type synchronization function, and a synchronization method using the same, and more particularly to a system and method for collecting auto-negotiation connection type information on a remote Type information is transmitted to the home station (local) side, and synchronization is performed when the connection type information of the remote (side) is compared with the connection type information of the remote side (local) System and method of a TDM scheme that ensures transparent transmission of an Ethernet signal by updating connection-type connection information on the local side.

In order to meet the demand for various multimedia services such as demands for increasing data traffic, high-performance television (HDTV), e-commerce, and video on demand (VOD), capacity expansion of the existing subscriber network is required.

Various passive optical network (PON) based on optical fiber have been actively studied for capacity expansion in the subscriber network. Among the various PON technologies proposed so far, Wavelength-Division Multiplexing (WDM) has been recognized as an alternative. In this wavelength division multiplexing technique, one wavelength is allocated to each subscriber.

Therefore, it is essential to realize low-cost subscriber optical sources in the above-described WDM-PON technology, and a low-density wavelength division multiplexing (WDM-PON) technique using a laser diode, Wave-Division Multiplexing (CWDM) is presented as a practical alternative to realize an economical subscriber network.

Meanwhile, in the CWDM-PON technique for multiplexing and transmitting Ethernet electrical signals, the following method can be used for multiplexing an Ethernet frame into an optical signal. A switching multiplexing method using an L2 switch (L2 switch), and a wavelength division multiplexing method using TDM.

In the case of using the wavelength division multiplexing method using TDM, since the Ethernet signal generated in the user terminal is directly processed in the PHY without processing in the MAC (Medium Access Control Layer), transparent transmission of the Ethernet signal is required.

When the user terminal is connected to the Ethernet using the wavelength division multiplexing equipment, the physical connection method between the Ethernet client ports is determined using an auto-negotiation algorithm in the physical layer (PHY).

In the case of the TDM type wavelength division multiplexing apparatus, if the local side and the remote side Ethernet connection type are different from each other, even if the connection method between the Ethernet client ports is determined using the auto-negotiation algorithm, There is a problem that the connection method is inconsistent and transparent transmission is difficult.

Patent Document 1: JP-A-10-0013539

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a wavelength division multiplexing apparatus, system, and method for collecting Ethernet connection type information on a remote side.

It is another object of the present invention to provide a wavelength division multiplexing apparatus, system and method for transmitting collected connection type information to a local side.

It is still another object of the present invention to provide a wavelength division multiplexing apparatus, system, and method for synchronizing the acquired information of two types of accesses in comparison with each other.

According to an aspect of the present invention, there is provided an apparatus and method for receiving an Ethernet signal generated in a user terminal, the method comprising: receiving an Ethernet PHY for performing the auto-negotiation; An automatic negotiation synchronization unit for collecting the auto-negotiation connection type information or for synchronizing a connection type when the connection type information is judged to be different, a multiplexer for multiplexing the connection type information and the Ethernet signal in a multiplexing frame, A multiplexing frame processing unit for demultiplexing and demultiplexing the multiplexed frame, and a CWDM photoelectric conversion unit for converting the electrical signal of the multiplexed frame into an optical signal and then transmitting or optically converting the received optical signal into an electrical signal of the multiplexed frame.

It is another object of the present invention to provide a method of controlling an optical line terminal, comprising the steps of: checking whether an alarm is generated in an optical line; maintaining a current state if the alarm is being generated; Determining whether the reception is completed, maintaining the current state when the reception is not completed, repeatedly confirming the remote side auto-negotiation connection type information, and if the reception is completed, (Link Status), Speed (Speed), and Duplex Mode information among the connection type information and the local side connection type information; determining whether the remote side connection type information and the local side connection type information Confirming whether or not an alarm is generated on the optical line when it is determined that the remote side connection type And updating the remote side connection type information with the local side connection type information when it is determined that the local side connection type information does not match.

As described above, according to the configuration of the present invention, it is expected that the Ethernet signal can be transmitted transparently without changing the connection type between the local side and the remote side.

1 is a block diagram showing a configuration of a low-density wavelength division multiplexing apparatus according to the present invention;
2 is a block diagram showing a configuration of a low-density wavelength division multiplexing system according to the present invention;
3 is a flowchart showing a low-density wavelength division multiplexing method according to the present invention.

Brief Description of the Drawings The advantages and features of the present invention, and how to achieve them, will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. The dimensions and relative sizes of layers and regions in the figures may be exaggerated for clarity of illustration. Like reference numerals refer to like elements throughout the specification.

Hereinafter, preferred embodiments of the low-density wavelength division multiplexing apparatus and the system according to the present invention having the above-described configuration will be described in detail with reference to the accompanying drawings.

Referring to FIG. 1, a low-density wavelength division multiplexing apparatus 100 having a synchronization function for the auto-negotiation connection type of the present invention includes a user terminal (T), standard Ethernet electrical signal matching and auto-negotiation An Ethernet signal processing unit 120 for processing an Ethernet signal generated by the user terminal T, and a control unit 130 for collecting the auto-negotiation connection type information, An auto-negotiation connection type synchronization unit 130 for synchronizing the connection type when it is judged to be different, a multiplexed frame processing unit 140 for multiplexing the connection type information and the Ethernet signal in a multiplexing frame or demultiplexing a multiplexed frame, And converting the electrical signal of the multiplexed frame into an optical signal and converting the received optical signal into an electrical signal of the multiplexed frame, And a CWDM photoelectric conversion unit 150 for converting the CWDM light.

The auto-negotiation connection type synchronizing unit 130 includes an Ethernet PHY resist control unit 210 for acquiring the connection type information on the main station side, a main office client connection type information unit 220 for storing connection side type information on the main station side, An overhead processing unit 230 for performing overhead processing for overhead processing of the base station side connection type information, an overlaying client connection type information unit 240 for storing the uplink side connection type information, a base station side connection type information and major side connection type information, And a connection type information updating unit 260 for managing and updating the connection type information.

The connection type information may include a link status, a speed, and a duplex mode.

The connection type information updating unit 260 may include an auto-negotiation advertisement register and an auto-negotiation link partner ability register ).

For example, a corresponding bit of an associated bit of the auto-negotiation link partner function register ANLPAR in the connection type information on the partner side is extracted and the connection type information - Update to Negotiation Advertising Register (ANAR).

2, the low-density wavelength division multiplexing system 1000 of the present invention is connected to a plurality of remote user terminals T11 and T12 and remote user terminals T11 and T12 via an Ethernet, A remote client port 100a for determining a type of physical connection with the remote user terminals T11 and T12 and a remote client port 100a are connected to each other using an optical line and when the auto- And a plurality of local user terminals T21 and T22 connected to the local client port 100b through an Ethernet connection. Where the remote is relative from the perspective of the local client port and the remote can be local if the position is changed.

The remote client port 100a includes an Ethernet PHY 110a for receiving an Ethernet signal from the user terminals T11 and T12 in hardware and performing auto-negotiation, an Ethernet signal processing unit for separating and processing an Ethernet frame from the Ethernet signal, Negotiation information synchronization unit 130a for collecting automatic-negotiation connection type information, determining whether the connection type information is the same or different, and determining synchronization, an Ethernet frame and connection type information And a CWDM photoelectric conversion unit 150a for converting an electrical signal of the multiplexed frame into an optical signal.

The auto-negotiation connection information synchronization unit 130a includes an Ethernet PHY resist control unit 210a for detecting and acquiring remote side connection type information, at least a link status (Link Status), a speed (Speed), and A remote client connection type information part 220a for storing information on duplex mode information, and an overhead processing part 230a for overhead processing of connection type information for transmission.

Meanwhile, a local client connection type information part 240a for storing overhead extracted local side connection type information, a connection type synchronization determination part 250a for determining synchronization in preparation for both side connection type information, and connection type information And a connection type information updating unit 260a for updating the connection type information.

The local client port 100b includes a CWDM photoelectric conversion unit 150b for converting an optical signal into an electrical signal of a multiplexed frame, a multiplexed frame processing unit 140b for dividing the multiplexed frame into Ethernet frame and connection type information, An Ethernet PHY 110b for processing the Ethernet signal in hardware and performing auto-negotiation, and an Ethernet PHY 110b for collecting remote side connection type information and local side connection type information, And an auto-negotiation connection information synchronization unit 130b for determining whether or not the connection type information is the same or different and determining synchronization.

The auto-negotiation connection information synchronization unit 130b includes an overhead processing unit 230b for receiving multiplexed frames and extracting overheads, a link status (Link Status), a speed (Speed), and a duplex mode A remote client connection type information part 240b for storing information on a connection type, a duplex mode information, an Ethernet PHY resist control part 210b for detecting and acquiring local side connection type information, a link status, A local client connection type information part 220b for storing duplex mode information, a connection type synchronization determination part 250b for determining synchronization in preparation for both connection type information, And a connection type information updating unit 260b.

Hereinafter, a method of synchronizing auto-negotiation connection types using a low-density wavelength division multiplexing apparatus will be described with reference to FIG.

The CWDM photoelectric conversion unit 150b checks whether an alarm is generated in the optical line (S10)

If the alarm is being generated, the current state is maintained. If the alarm is released, the reception of the remote side auto-negotiation connection type information is checked (S30).

If it is not completed, the current state is maintained and the remote side auto-negotiation connection type information is repeatedly confirmed (S50)

When the reception is completed and the related information is stored in the remote client connection type information part 240b, the remote side connection type information and the local side connection type information are compared and judged. (Link Status), Speed (Speed), and Duplex Mode (S60).

If it is determined that the remote-side connection type information and the local-side connection type information coincide with each other, the current state is maintained and whether or not an alarm is generated in the optical line is checked again (S70)

If it is determined that the remote side connection type information does not match the local side connection type information, synchronization is performed and the remote side connection type information is updated to the local side connection type information (S80).

As described above, the present invention collects auto-negotiation connection type information on the remote side, transmits the collected connection type information to the local side, assures remote transmission of the Ethernet side, Side connection type information are compared with each other to perform synchronization when they are different from each other. Many other modifications will be possible to those skilled in the art, within the scope of the basic technical idea of the present invention.

100: Low-density wavelength division multiplexing apparatus
110: Ethernet PHY 120: Ethernet signal processor
130 auto-negotiation connection type synchronization unit 140 multiplexed frame processing unit
150: CWDM light-
210: Ethernet PHY resist controller
220: Home Client Client Connection Type Information Unit
230: Overhead processor
240: Major Client Connection Type Information Unit
250: connection type synchronization determination unit
260: Connection type information update unit

Claims (10)

An Ethernet PHY for receiving an Ethernet signal generated by a user terminal in hardware and performing auto-negotiation;
An Ethernet signal processor for processing the Ethernet signal;
An auto-negotiation synchronization unit for collecting the auto-negotiation connection type information or for synchronizing the connection type when the connection type information is judged to be different;
A multiplexing frame processing unit for multiplexing the connection type information and the Ethernet signal in a multiplexing frame or demultiplexing and demultiplexing a multiplexing frame; And
And a CWDM photoelectric conversion unit for converting the electrical signal of the multiplexed frame into an optical signal and then transmitting the optical signal or photoelectrically converting the received optical signal into an electrical signal of the multiplexed frame,
Wherein the automatic-negotiation synchronization unit comprises:
An Ethernet PHY resist control unit for obtaining connection type information on the home side;
A main office client connection type information part for storing the connection type information of the home office side;
An overhead processing unit for performing overhead processing on the connection type information on the partner side;
An alternate client connection type information part for storing the connection side connection type information;
A connection type synchronization process of receiving the connection type information of the connection destination side and the connection type information of the connection side and synchronizing when the comparison result is different; And
And a connection type information updating unit for managing and updating the connection type information. delete The method according to claim 1,
Wherein the connection type information updating unit comprises:
Negotiation link partner ability register (Auto-Negotiation Link partner ability register) for controlling and managing the auto-negotiation information. Division multiplexing apparatus. The method of claim 3,
Wherein the connection type information includes at least a link status, a speed, and a duplex mode information. A plurality of remote user terminals;
A remote client port connected to the remote user terminal via an Ethernet and determining a physical connection type with the remote user terminal using an auto-negotiation algorithm;
A local client port connected to the remote client port using an optical line and performing synchronization when auto-negotiation connection type information does not match; And
And a plurality of local user terminals connected to the local client port by Ethernet,
The remote client port includes:
An Ethernet PHY for receiving the Ethernet signal from the user terminal in hardware and performing the auto-negotiation;
An Ethernet signal processor for separating the Ethernet frame from the Ethernet signal;
An auto-negotiation connection type synchronization unit for collecting the auto-negotiation connection type information;
A multiplexed frame processing unit for multiplexing the Ethernet frame and the connection type information into a multiplexed frame; And
And a CWDM photoelectric conversion unit for converting an electrical signal of the multiplexed frame into an optical signal,
Wherein the automatic-negotiation connection type synchronization unit comprises:
An Ethernet PHY resist control unit for detecting and acquiring the remote side connection type information;
A remote client connection type information part for storing at least link status, speed, and duplex mode information among the acquired connection type information; And
And an overhead processing unit for performing overhead processing on the connection type information and transmitting the connection type information. delete delete 6. The method of claim 5,
Wherein the local client port comprises:
A CWDM photoelectric conversion unit for converting the optical signal into an electrical signal of a multiplexed frame;
A multiplexed frame processing unit for separating the multiplexed frame into Ethernet frame and connection type information;
An Ethernet signal processor for processing the Ethernet frame into an Ethernet signal;
An Ethernet PHY for hardware processing the Ethernet signal and performing auto-negotiation;
And an automatic-negotiation connection type synchronization unit for collecting the remote-side connection type information and the local-side connection type information and determining whether or not both connection type information are the same or different, Multiplexing system. 9. The method of claim 8,
Wherein the automatic-negotiation connection type synchronization unit comprises:
An overhead processor for receiving the multiplexed frame and extracting an overhead;
A remote client connection type information part for storing a link status (Link Status), a speed (Speed), and a duplex mode information of the remote side connection type information;
An Ethernet PHY resist control unit for detecting and acquiring the local side connection type information;
A local client connection type information part for storing a link status, a speed, and a duplex mode information among the connection type information;
A connection type synchronization determination unit for determining synchronization by comparing the both connection type information; And
And a connection type information updating unit for managing and updating the connection type information. Confirming whether an alarm is generated in the optical line;
Maintaining the current state if the alert is occurring;
Checking whether the remote side auto-negotiation connection type information is received when the alarm is released, and determining whether the reception is completed;
Maintaining the current state when the reception is not completed, and repeatedly confirming the remote side auto-negotiation connection type information;
Comparing the link status, the speed, and the duplex mode information among the remote side connection type information and the local side connection type information when the reception is completed;
If it is determined that the remote side connection type information and the local side connection type information coincide with each other, checking again whether or not an alarm is generated in the optical line; And
And updating the remote side connection type information with the local side connection type information when it is determined that the remote side connection type information does not match the local side connection type information. Way.

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