KR20020084780A - Transfer system of ethernet access subscribe network - Google Patents

Abstract

PURPOSE: An ethernet subscriber unit transmission system is provided, which minimize a cost of a transmission apparatus by removing a multiplexing process and a demultiplexing process for data conversion and also removing a processing work of transmitted data, and also can reduce a management and maintenance cost of the transmission apparatus. CONSTITUTION: According to an ethernet subscriber network transmission system transmitting ethernet data generated from a subscriber to a high speed router(10), a subscriber transmission terminal(IXT1) transmits and receives the ethernet data from the subscriber in data converted into MII(Media Independent Interface) type transferred from a physical layer to a data link layer. A supplier transmission terminal(IXT2) receives and transmits MII type data from/to the subscriber transmission terminal, and converts it into ethernet data. And a switching part(XAS) switches data transmitted/received to/from the supplier transmission terminal to access with the high speed router.

Description

Ethernet subscriber station transmission system {TRANSFER SYSTEM OF ETHERNET ACCESS SUBSCRIBE NETWORK}

The present invention relates to an Ethernet subscriber-end transmission system, and more particularly, in the transmission of Ethernet data, eliminating the process of changing Ethernet data into another data format such as that applied to other protocols, By processing the data in the form of data, the transmission process is integrated into one, and the transmission structure is composed of the simplest structure, eliminating the multiplexing or demultiplexing process for data conversion in the aggregation and transmission process, and eliminating the processing of the transmitted data. The present invention relates to an Ethernet subscriber network transmission system that not only minimizes the cost of equipment but also reduces the cost of managing and maintaining transmission equipment.

The Internet is the world's largest network, interconnected with telecommunication networks in more than 190 countries around the world, and is connected by the Transmission Control Protocol / Internet Protocol (TCP / IP) protocol.

The Internet is a very widespread and general purpose network with 200 million users and about 30 million hosts connected to the Internet.

Services available on the Internet include e-mail, remote computer connection (telnet), file transfer (FTP), Usenet News, Internet information search (Gopher), Internet conversation and discussion (IRC), Electronic bulletin boards (BBS), hypertext information viewing (WWW: World Wide Web), online games, and other services are being developed and made available in turn. Because of these various services and abundant information resources, the Internet is called the sea of information.

There are two methods of accessing the Internet, a dedicated IP connection and a dial-up IP connection using a telephone line. Internet users need to join an Internet Service Provider (ISP) company that provides services to connect to the Internet with an IP address assigned by their network's network information center (NIC).

These ISPs are individually connected to Internet access providers in the United States or other countries, have the necessary equipment and communication lines for Internet access, and even have their own high-speed leased lines.

There are various ways to connect the Ethernet data generated from the Internet subscriber to the ISP provider to support the Internet data service. The ultimate purpose of the diagram is to stably operate the Ethernet data generated from the subscriber. The purpose is to transmit to a Gateway-Way Router connected to the Internet.

The internet network refers to a system network system that transmits data by exchanging data by switching data so as to interwork with each other to transmit data to a router. Your system, that is, the system that generates Ethernet data, should have a structure that can send data to the router in any form.

As such, the costs incurred in installing and installing a subscriber network to have a structure capable of transmitting data to a router can be classified into three categories.

First, collecting and converting data generated at the subscriber

Secondly, the data generated from the subscriber is transmitted to the ISP provider data aggregation system.

Third, the efficient operation and management of the established internet network

Can be classified as

First, in the process of collecting and converting data generated from subscribers, it is necessary to install equipment necessary for this because it is transmitted through various equipments such as Add-Drop equipment to convert and transmit data to a high speed data aggregation router. There is a problem.

In the second step of transmitting the data generated from the subscriber to the ISP provider data aggregation system, the system used up to now does not have a structure in which the data generated from the subscriber is directly connected to the remote ISP provider. It is delivered using a number of devices that have processes such as encoding and decoding of transmitted data.

Looking at the configuration of the current Asymmetric Digital Subscriber Line (ADSL) system, Ethernet data must first be transferred to an Asynchronous Transfer Mode (ATM) to transfer data from subscribers to a digital subscriber line access multiplexer (DSLAM) device. In order to convert data into data, data encapsulation and decapsulation are implemented and transmitted as ATM data.

The DSLAM device processes the ATM cell and implements an ATM switch again, which is converted to T3 format, transmitted to the DAS device, and connected to the device and the router device.

Again, T3 data is converted back to ATM data and this data is converted to Ethernet data for processing.

The process of delivering Ethernet data from individual subscribers to the router is implemented as a transmission system that goes through many data conversion processes using TDM-based equipment such as ADSL or T1 / E1, resulting in high cost and low efficiency. This problem is a problem that the subscriber has to pay a high cost in order to receive the Internet service, which acts as a deterrent to the spread of the Internet.

In addition, third, the data transmission process is complex and is constructed to convert and transmit data while passing through a variety of equipment, there is a problem in that it is very complicated and requires a lot of manpower to maintain a complex and diverse equipment.

The present invention was created to solve the above problems, and an object of the present invention is to integrate the transmission process into one in the transmission of Ethernet data and to configure the transmission structure in the simplest structure to convert data in the aggregation and transmission process. The present invention provides an Ethernet subscriber network transmission system that eliminates multiplexing or demultiplexing processes and eliminates processing of transmitted data, thereby minimizing the cost of transmission equipment and reducing the cost of managing and maintaining the transmission equipment.

In addition, the present invention provides an Ethernet subscriber station transmission system in which Ethernet data generated at the subscriber end can be connected to a router of a remote ISP by being connected by an optical cable or a coaxial cable at the Ethernet subscriber end.

1 is a schematic diagram showing an Ethernet subscriber network transmission system according to the present invention.

FIG. 2 is a diagram illustrating the location of data delivered in an Ethernet subscriber network transmission system according to the present invention in OSI layer 7. FIG.

3 is a block diagram of MII data processing and transmission in a subscriber transmission terminal of an Ethernet subscriber network transmission system according to the present invention.

4 is a view showing the OSDT transmission line drive unit of the Ethernet subscriber network transmission system according to the present invention.

5 is a view showing a WDM transmission line drive unit of an Ethernet subscriber network transmission system according to the present invention.

-Explanation of symbols for the main parts of the drawing-

10: router 20: subscriber splitter

30: supplier splitter

100: Ethernet data receiver

200: Ethernet data transmission conversion unit

300: transmission line drive unit

IXT1: Subscriber Transmission Terminal

IXT2: Supplier Transfer Terminal

XAS: Switching part

The present invention for realizing the above object is an Ethernet subscriber network transmission system for transmitting Ethernet data generated from a subscriber to a high-speed router, the MII type to transfer the Ethernet data generated from the subscriber from the physical layer to the data link layer A subscriber transport terminal in the form of a subscriber terminal for transmitting and receiving data converted into a data exchange, a provider transport terminal for transmitting and receiving data in the form of MII type and a subscriber transport terminal, and data transmitted and received from the provider transport terminal, Characterized in that it comprises a switching unit for switching to be able to connect.

In addition, the subscriber transmission terminal and the provider transmission terminal is an Ethernet data receiving unit for transmitting and receiving Ethernet data with the subscriber, Ethernet data transmission for converting the Ethernet data received from the Ethernet data receiving unit to MII data to transmit the MII type data And a transmission line drive unit for transmitting and receiving the MII type data converted by the Ethernet data transmission conversion unit between the subscriber transmission terminal and the supplier transmission terminal through the transmission medium.

In addition, the transmission line drive unit is characterized in that it is formed in an optional format to be replaceable according to the transmission medium.

At this time, the transmission medium supported by the transmission line drive unit is characterized in that the optical path and the copper line.

In addition, when the transmission line drive unit supports the optical path, at least one of the OSDT technology and WDM technology is applied. And, if the transmission line drive unit supports the copper line is characterized in that the OSDT technology is applied.

Meanwhile, the supplier transmission terminal is formed inside the switching unit.

The present invention made as described above is a high-speed router to transmit and receive Ethernet data generated from the subscriber in the form of MII (Media Independent Interface), which is an intermediate stage transmitted from the physical layer of the OSI layer 7 to the data link layer through a fiber or copper line Switching to and simplifies the data transmission structure, eliminating the process of converting to other data formats, minimizing the cost of the equipment, and replacing the transmission line driver, making it applicable to both optical and copper lines.

In addition, by applying OSDT / WDM technology, the optical bands of transmission and reception are differently used to perform transmission and reception through one optical path.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. In addition, this embodiment is not intended to limit the scope of the present invention, but is presented by way of example only.

1 is a schematic diagram showing an Ethernet subscriber network transmission system according to the present invention.

As shown here, a subscriber transmission terminal (IXT1: Intelligent DSL-OPTIC) for transmitting or receiving the Ethernet data generated at the subscriber end from a physical layer to the data link layer in the form of MII, which is an intermediate stage, is transmitted at a long distance. -The router 10 by switching the data received from the provider terminal (IXT2), and the provider transmission terminal (IXT2) for transmitting and receiving data in the form of MII and subscriber transmission terminal (IXT1) and Ethernet data And a switching unit (XAS: XDSL-OPTIC Access Switching System) for connection.

In addition, the supplier transmission terminal IXT2 and the switching unit XAS may be formed as one module to be formed inside the switching unit.

The switching unit XAS aims to efficiently connect the data transmitted from the subscriber transmission terminal IXT1 to the high speed router 10.

Therefore, the structure of the switching unit (XAS) handles the data switching function of the data link layer like the existing switch equipment, and can connect directly with a large router in the form of 100 / T or Gigabit Ethernet or more with a high-speed router. Provide an interface.

So, by converting the Ethernet data generated from the subscriber into MII-type data of the physical layer without the conversion process, the Ethernet data is maintained without changing the format of the transmitted data, thereby converting the data in the aggregation and transmission process. It eliminates the multiplexing or demultiplexing process for the system, and eliminates the processing of the data to be transmitted, which has advantages that cannot be compared with the data processing method of the data link layer or the data processing method of the transport layer. It will provide a basis for manufacturing.

FIG. 2 is a diagram illustrating the location of data delivered in an Ethernet subscriber network transmission system according to the present invention in OSI layer 7. FIG.

As shown here, the OSI 7 layer includes a physical layer, a data link layer, a network layer, a transport layer, a session layer, and a presentation layer. (Presentation Layer) and Application Layer.

The first layer, the physical layer, involves the transmission of data from one computer to another via physical media, and how the cable is connected to the network adapter card and what transmission scheme is used to transfer the data over the cable. It contains a definition of what was used.

Therefore, in the present invention, when the OSI layer 7 is defined in the Ethernet data transfer step defined in IEEE 802.3, data in the process of transferring the data transferred from the physical layer to the data link layer is transferred to the intermediate media reduced independent media (RMII) and GMII (Gigabit). It captures data in the form of Media Independent Interface (MII), Media Independent Interface (MII), etc. and transmits it remotely.

3 is a block diagram of MII data processing and transmission in a subscriber transmission terminal of an Ethernet subscriber network transmission system according to the present invention.

As shown here, the Ethernet data receiver 100 for transmitting and receiving Ethernet data to and from the subscriber, and the Ethernet data transmission for converting the Ethernet data received by the Ethernet data receiver 100 into MII data to transmit the data of the MII type Transmission line driver unit 300 for transmitting and receiving the MII type data converted by the conversion unit 200 and the Ethernet data transmission conversion unit 200 between the subscriber transmission terminal (IXT1) and supplier transmission terminal (IXT2) through a transmission medium. It is characterized by consisting of.

That is, the subscriber transmission terminal IXT1 captures the data of the physical layer generated at the subscriber and transmits the data to the supplier transmission terminal IXT2 at a long distance through the transmission medium supported by the transmission line drive unit 300.

This Ethernet subscriber network transmission system will support a wide range of broadband services for business customers of all sizes and will allow subscribers to have dedicated bandwidths of 1 to 100 Mbps.

At this time, by converting the transmission line drive unit 300 easily into a modular form, by implementing a structure that can select a transmission medium can support a variety of connection environment to support a plurality of transmission media, such as optical fiber or copper wire.

Therefore, the transmission line drive unit 300 supports both the optical line and the copper line, thereby supporting the Asymmetric Digital Subscriber Line (ADSL) and the Very High Rate Digital Subscriber Line (VDSL) services for the service in the region without the optical line. .

In addition, when using an optical line or copper line, it implements a single channel OSDT (One Side Drive Transmission) technology to support transmission and reception using one optical line or copper line and merges the two technologies. One technology helps to implement a system that saves multiple optical or copper tracks.

4 is a view showing the OSDT transmission line drive unit of the Ethernet subscriber network transmission system according to the present invention.

The OSDT transmits MII data to be periodically transmitted from the switching unit, and receives the Ethernet data received in MII form in the subscriber transmission terminal IXT1. The time of data transmitted from the switching unit XAS is based on the OSDT. It is a function to receive the data collected from the subscriber toward the switching unit (XAS) in synchronization with the.

This feature allows two lines to be transmitted and received in one line in a conventional optical line system.

That is, when MII transmits data to subscriber transmission terminal IXT1 at subscriber transmission terminal IXT1 or provider transmission terminal IXT2, the provider instead of having two existing transmission / reception lines at supplier transmission terminal IXT2. Transmit and receive in one line at regular intervals so that the transmission terminal (IXT2) can transmit and receive in one line.

Therefore, in order to transmit and receive simultaneously, the subscriber transmission terminal (IXT1) and the supplier transmission terminal (IXT2) do not have to send data on one line at the same time. Therefore, the transmission and reception switching unit (XAS) drives transmission and reception. do.

First, when data of MII is generated at the switching unit XAS, Ethernet data MII to be transmitted is transmitted to the subscriber transmission terminal IXT1.

When the transmitting side of the switching unit (XAS) periodically transmits the data of MII, the data generated before the period is buffered to be sent at a time.

In addition, when a series of data is received from the switching unit XAS, the subscriber transmission terminal IXT1 transmits the MII data generated at the subscriber to a higher level within a predetermined time period within the transmission period of the switching unit XAS.

This has a structure for transmitting data to the upper part in accordance with the reception period of the data generated in the switching section (XAS).

The subscriber transmission terminal IXT1 at the lower side buffers a certain amount of generated data until data arrives from the upper side, and occupies the Ethernet line in order to delay generation of data by the subscriber when buffering is insufficient. It occupies the line and supports the ability to induce data buffering at the subscriber's PC.

5 is a view showing a WDM transmission line drive unit of an Ethernet subscriber network transmission system according to the present invention.

As shown here, the portion of reducing the transmission and reception of the optical fiber can be implemented as a technique of Wavelength Division Multiplexor (WDM), and the function of the WDM is to use one optical line by using different optical wavelength bands of transmission and reception in the optical fiber. Support transmission and reception without interference.

That is, when the subscriber-side splitter 20 combines transmission and reception light wavelengths of λ ₁ and λ ₂ and transmits them, the provider-side splitter 30 receives the transmission and reception light wavelengths of λ ₁ and λ ₂ separately. On the contrary, when the transmitter-side splitter 30 combines transmission and reception light wavelengths λ ₁ and λ ₂ and transmits them, the receiver side splitter 20 separates transmission and reception light wavelengths λ ₁ and λ ₂ and receives and transmits them. When receiving, transmission and reception are implemented without interference through one optical line. In addition, by dividing one line of light into two or more wavelengths as necessary, the number of lines as needed can be reduced.

On the other hand, as the transmission method between the subscriber transmission terminal (IXT1) and the switching unit (XAS), it is possible to support both of the above OSDT method and WDM method, and combine the above two technologies to implement OSDT / WDM technology. The implementation supports the transmission of many transmit and receive functions over a single existing fiber path.

As described above, the present invention eliminates the process of changing Ethernet data into another data format such as that applied to other protocols in transmitting Ethernet data, and processes the data in the form of MII specified in IEEE802.3. , The structure of the transmission structure with the simplest structure, eliminating the multiplexing or demultiplexing process for data conversion in the aggregation and transmission process, and eliminating the processing work of the transmitted data, thereby minimizing the cost of the transmission equipment. There is this.

In addition, by simply configuring the transmission structure, it is easy to manage and maintain the aggregation and transmission equipment by the unification of the equipment, and there is an advantage of providing a service that satisfies subscribers by providing continuity and flexibility of services.

In addition, the present invention implements a structure that can select the transmission medium by easily converting only the transmission line drive unit into a module form by changing the transmission line drive unit in an optional format to support a variety of connection environment to enable transmission up to 100 Km Thus, there is an advantage that any subscriber belonging to the city network can be accommodated.

In addition, the present invention has the advantage of saving the optical path by performing transmission and reception through one optical path by using the OSDT technology and WDM technology in the transmission line drive unit.

In addition, the present invention can be expected to replace the multiple transmission and reception lines with a single optical fiber when using the OSDT / WDM technology, and to newly install the light beam to the subscriber by enabling the efficient use of the optical fiber in the optical transmission network There is an advantage in eliminating and reducing network facilities and operation costs.

In addition, the present invention has the advantage that can accommodate a large number of subscribers that can not install the optical path to the subscriber by supporting the Ethernet data transmission in the copper line as well as the optical line in the transmission line drive unit.

In addition, the present invention has the advantage that it is possible to provide a variety of subscriber access services by supporting the ADSL, VDSL for services in the area without the optical fiber by transmitting Ethernet data over the copper wire.

In addition, the present invention has the advantage that the configuration of the system is very convenient and easy to easily build a subscriber access device according to the subscriber extension.

Claims (7)

In the Ethernet subscriber network transmission system for transmitting the Ethernet data generated from the subscriber to a high-speed router, A subscriber station terminal for transmitting / receiving Ethernet data generated from the subscriber as data converted into MII form transmitted from a physical layer to a data link layer; A provider transmission terminal for transmitting and receiving the subscriber transmission terminal and MII data and converting the data into Ethernet data; And a switching unit for switching the data transmitted and received from the provider transmission terminal to be connected to a high speed router. The method of claim 1, wherein the subscriber transport terminal and the provider transport terminal is Ethernet data receiving unit for transmitting and receiving subscriber and Ethernet data, An Ethernet data transmission and conversion unit for converting the Ethernet data received by the Ethernet data receiving unit into MII data for transmitting MII data; And a transmission line drive unit configured to transmit and receive the MII type data converted by the Ethernet data transmission conversion unit between a subscriber transmission terminal and a supplier transmission terminal through a transmission medium. 3. The Ethernet subscriber network transmission system according to claim 2, wherein the transmission line drive unit is formed in an option form so as to be replaceable according to a transmission medium. The transmission system of claim 2, wherein the transmission medium supported by the transmission line drive unit is an optical line and a copper line. The Ethernet subscriber network transmission system according to claim 2, wherein at least one of OSDT technology and WDM technology is applied when the transmission line driver supports an optical path. 3. The Ethernet subscriber network transmission system according to claim 2, wherein OSDT technology is applied when the transmission line driver supports a copper line. The Ethernet subscriber network transmission system according to claim 1, wherein the provider transmission terminal is configured inside the switching unit.