KR100696203B1 - WDMA central station, WDMA user interface for optical layer connection services in a optical network using wavelength division multiple access form and a service method for the same - Google Patents

Abstract

The present invention provides a WDMA central station device, an WDMA user access device, and a service for an optical layer connection service in an optical network using a wavelength division multiple access (WDMA) method. A method comprising: an optical layer connection unit for receiving, distributing, selecting, and transmitting optical signals transmitted from a plurality of WDMA user access apparatuses to a plurality of user terminals, and the plurality of WDMA user access apparatuses through the optical layer connection unit; And a network controller for transmitting and receiving control information and network state information related to the optical layer connection received from the mobile terminal, and providing a connection service in the optical layer according to the required quality of the plurality of user terminals, thereby ensuring the stability of the optical layer signal quality. Easy to design and manage strict, optical network with existing distributed management / control structure Compared to this, it is not only efficient in terms of providing surveillance function and security for the entire network, but also can provide differentiated light layer connection service.

Wavelength Division Multiple Access, Optical Network, WDMA Central Station, WDMA User Interface, Network Control Unit

Description

WDMA central station device, WDMA user interface device and service method thereof for optical layer connection service in optical network using WDMA method [WDMA central station, WDMA user interface for optical layer connection services in a optical network using wavelength division multiple access form and a service method for the same}

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an overall configuration diagram illustrating a system to which a WDMA central station apparatus and a WDMA user access apparatus are applied for an optical layer connection service in an optical network using a WDMA scheme according to an embodiment of the present invention.

2 is a block diagram illustrating in detail a WDMA central station apparatus for a layer connection service in an optical network using a WDMA scheme according to an embodiment of the present invention.

FIG. 3 is a block diagram illustrating in detail a WDMA user access device for an optical layer connection service in an optical network using a WDMA scheme according to an embodiment of the present invention.

FIG. 4 is a connection control flowchart for explaining a method of a layer connection service in an optical network using a WDMA scheme according to an embodiment of the present invention.

*** Explanation of symbols on main parts of drawing ***

CS: WDMA central station device, 100: network control unit,

200: optical layer connection, 210: NxN passive optical coupler,

220: connection wavelength selector, 221: 1: N passive wavelength demultiplexer,

222: N optical signal detection circuits, 223: (1 + N): 1 electrical signal switch,

224: fixed wavelength optical signal transmitter, 300: WDMA user access device,

310: optical signal detection circuit, 320: 1: 2 electrical signal demultiplexer,

330: user terminal connection portion, 340: fixed wavelength optical signal transmitter,

350: 2: 1 electrical signal multiplexer, 360: WDMA access control,

400: user terminal

The present invention relates to a WDMA central station apparatus, a WDMA user access apparatus, and a service method thereof for a layer connection service in an optical network using a WDMA scheme. More particularly, the present invention relates to security of an entire network through a centralized control structure. , Reliability, monitoring, and rapid connection service, and through the upper layer and protocol-transparent media access control to provide the connection service of the light layer differentiated according to the needs of the user terminal. A WDMA central station apparatus, a WDMA user access apparatus, and a service method thereof for an optical layer connection service in an optical network using a WDMA scheme.

With the recent convergence of broadcasting and telecommunications and the rapid development of personal digital assistants and digital consumer electronics, optical networks must be able to accommodate various kinds of traffic. In addition, the traffic volume is changing rapidly and the average traffic size is increasing every year.

Most existing optical networks perform only high-speed data transfer between intercity or intercontinental. Therefore, it can be said that the optical network R & D has been focused on improving the performance of optical devices for high speed long distance transmission rather than networking technology in the optical layer. Low loss optical fibers, high speed optical transceivers, wavelength multiplexers, wavelength demultiplexers and optical amplifiers are typical examples of optical devices for high speed long distance transmission.

However, future optical networks should no longer serve as point-to-point, high-speed, long-distance transmission networks. Various user terminals are directly connected to the optical network through the optical interface, so that a local area network (LAN), a metro-politan area network (MAN), and a storage medium network (SAN) This is because an optical network capable of such a configuration is required.

Therefore, the optical network of the future should be able to provide networking functions such as traffic monitoring, connection control and network management at the optical layer to provide high-speed long-distance transmission as well as differential connection services according to user terminal requirements. do.

On the other hand, in the optical network using the conventional Wavelength Division Multiple Access (WDMA) method, the media access control method such as the time division multiple access method or the token ring method used in the existing electric network is used. Only wavelength information was added to provide connection services in the optical layer.

That is, the connection service in the optical layer was also entirely dependent on the extended protocol of the upper data transport layer. In addition, since most WDMA optical networks have a distributed structure in which each user terminal executes a media access control protocol, there is a problem in that security, stability, monitoring, and quick connection service are provided for the entire network.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to realize optical signal quality stability, short connection setup time, and inexpensive and simple implementation of a WDMA user interface device by using a wavelength fixed optical element. The centralized management and control structure not only provides security, stability, monitoring and fast connection services for the entire network, but also protocol-transfer due to the adoption of in-band signaling method independent of upper layer. The present invention provides a WDMA central station device, a WDMA user access device, and a service method thereof for an optical layer connection service in an optical network using a WDMA scheme capable of providing a rich and differentiated optical layer connection service.

In order to achieve the above object, a first aspect of the present invention provides an optical fiber including a passively formed optical coupler for receiving, distributing, selecting, and transmitting optical signals transmitted from a plurality of WDMA user access apparatuses to a plurality of user terminals. And a network controller for transmitting and receiving control information and network state information related to the optical layer connection received from the plurality of WDMA user access devices through the optical layer connection unit including the layer connection unit and the passively formed optical coupler. The present invention provides a WDMA central station apparatus for an optical layer connection service in an optical network using a WDMA scheme, wherein the connection service is provided in the optical layer according to a required quality of a user terminal.

Here, the optical layer connection unit including the passively formed optical coupler, NxN passive molding for distributing the power of each input optical signal connected to the plurality of WDMA user access devices in a WDMA manner to each output port by one-nth Optical coupler; And converting optical signals distributed from an output port of the NxN passive optical coupler into wavelength demultiplexing and electrical signals, and selecting any one of the converted electrical signals and electrical signals provided from the network controller. It is preferable to include a plurality of connection wavelength selectors for converting and transmitting an optical signal having a unique wavelength.

Preferably, the plurality of connection wavelength selectors include: a passive 1: N wavelength demultiplexer for separating the optical signal distributed from the output port of the NxN passive optical coupler for each wavelength; N optical signals for converting optical signals separated from the passive 1: N wavelength demultiplexer into electrical signals for transmission to the network controller or (1 + N): 1 electrical signal switch according to a control signal of the network controller Circuits; (1 + N): 1 electrical signal switch for selecting and transmitting any one of an electrical signal transmitted from said N optical signal detection circuits and an electrical signal transmitted from said network controller according to a control signal of said network controller; And a wavelength fixed optical transmitter for receiving the electrical signal transmitted from the (1 + N): 1 electrical signal switch and converting the optical signal to an optical signal having a predetermined wavelength.

Preferably, the network controller monitors the optical layer connection information between all the WDMA user access devices connected to the optical network in real time to manage the information of the entire network.

A second aspect of the present invention includes an optical signal detection circuit for receiving an optical signal transmitted from a WDMA central station apparatus in charge of overall management and converting the optical signal into an electrical signal; A 1: 2 electrical signal demultiplexer for receiving the converted electrical signal from the optical signal detecting circuit and transmitting the electrical signal according to a predetermined control signal; A user terminal connection unit for receiving an electric signal transmitted from the 1: 2 electric signal demultiplexer and transmitting the received electric signal to a user terminal, and receiving and transmitting the optical layer connection request information and data from the user terminal; Receiving the layer connection request information transmitted from the user terminal connection unit, generating the layer connection request signaling information, and transmitting the connection response signaling information provided from the WDMA central station apparatus to the user terminal, A WDMA access control unit for controlling the operation of the 1: 2 electrical signal demultiplexer and the 2: 1 electrical signal multiplexer; A 2: 1 electrical signal multiplexer for transmitting any one of an electrical signal received from the user terminal access unit and the WDMA access control unit according to a control signal of the WDMA access control unit; And a wavelength fixed optical transmitter for converting an electrical signal transmitted from the 2: 1 electrical signal multiplexer into an optical signal and transmitting an optical signal having a predetermined wavelength, each of which is connected to a plurality of user terminals. A WDMA user access device for an optical layer connection service in an optical network using a WDMA method, comprising: transmitting data and optical layer connection information between the plurality of user terminals in a WDMA method using an optical signal having an assigned wavelength. To provide.

According to a third aspect of the present invention, there is provided a service method for an optical layer connection in an optical network including a plurality of WDMA user access devices interconnected with a user terminal and a WDMA central station device using a WDMA method, the method comprising: (a) the Receiving a layer connection request signal according to a request of a user terminal from a source WDMA user access device among a plurality of WDMA user access devices, and transmitting the request to the destination WDMA user access device through the WDMA central station device; Receiving the transmitted layer connection request signal from a WDMA user access device and transmitting a connection response signal for approval or rejection of the layer connection to the source WDMA user access device through the WDMA central station device, (c) When receiving the connection acknowledgment signal from the source WDMA user access device, the corresponding user terminal And transmitting and receiving data between user terminals by transmitting a data transmission start signal and (d) reserving an optical layer connection when the source WDMA user access device receives the connection rejection response signal. The connection request signal and the connection response signal pass through a passively formed optical coupler of the DMA central station apparatus.

The optical layer connection request signal may include an address, a request connection type, and connection request class information of a destination WDMA user access device.

Preferably, the address of the destination WDMA user access device is at least one of unicast, broadcast or multicast.

Preferably, the required connection form consists of a point-to-point connection or an annular connection.

Preferably, the connection request class comprises the connection priority and reservation information.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the following embodiments are provided to those skilled in the art to fully understand the present invention, and may be modified in various forms, and the scope of the present invention is limited to the embodiments described below. It doesn't happen. Like numbers refer to like elements in the figures.

1 is a diagram illustrating a WDMA central station device and a WDMA user access device for an optical layer connection service in an optical network using a WDMA (Wavelength Division Multiple Access, WDMA) method according to an embodiment of the present invention. This is a general configuration diagram for explaining the system.

Referring to FIG. 1, the overall system for the optical layer connection service in the optical network using the WDMA scheme applied to an embodiment of the present invention is largely a WDMA user interface (WUI) 300 and a WDMA central network. It comprises a station apparatus (Central-Station, CS).

Here, the WDMA user access device 300 is interconnected with the user-station 400 by using the WDMA method and the data and the optical data between the user terminal 400 through an optical signal of a unique wavelength assigned to the user. It performs the function of transmitting and receiving the layer connection information signal.

That is, the plurality of WDMA user access devices 300 located in each of the nodes Node1 to Node N are connected to the WDMA central station device CS through an optical signal of a predetermined wavelength. The WDMA user access device 300 may be connected to the user terminal 400 through various existing protocol interfaces, process the optical layer connection information signal from the user terminal 400, and execute the WDMA central station device ( Data is transmitted and received between the user terminal 400 through the optical layer connection with the CS. On the other hand, the user terminal 400 is not included in the present invention.

In this case, the optical layer connection request signal preferably includes an address, a request connection type and connection request class information of the destination WDMA user access device 300.

In addition, the address of the destination WDMA user access device 300 may be, for example, at least one of a unicast, a broadcast, or a multicast scheme.

In addition, the required connection form is preferably made of, for example, a point-to-point connection or a ring type connection.

In addition, the connection request level is preferably made including the connection priority and reservation information.

The WDMA central station apparatus CS receives optical signals transmitted from the plurality of WDMA user access apparatuses 300, distributes them, selects them, and transmits them to the respective user terminals 400. The user terminal 400 It performs the function of providing connection service in the light layer according to their quality requirements.

The WDMA central station device CS may manage the information of the entire network by monitoring in real time the optical layer connection information between all the WDMA user access devices 300 connected to the optical network.

2 is a block diagram illustrating in detail a WDMA central station apparatus for a layer connection service in an optical network using a WDMA scheme according to an embodiment of the present invention.

2, a WDMA central station (CS) according to an embodiment of the present invention is largely divided into a network controller unit (NCU) 100 and a WDMA connection unit (WCU) 200; It is made to include.

The network controller 100 performs a function of transmitting and receiving control information and network state information related to the optical layer connection received from the plurality of WDMA user access devices 300 through the optical layer connection unit 200.

In addition, the network control unit 100 transmits and receives control information related to the optical layer connection through centralized control of the optical layer connection unit 200, collects the optical layer network state information, and differentiates them according to the required quality. A layer-independent layer connection service can be provided.

In addition, the network controller 100 controls the optical layer connection between the WDMA user access device 300 and the user terminals 400 connected to the optical network using a conventional in-band signaling method. Status monitoring and management operations can be performed.

In this case, the conventional in-band signaling method is a method of transmitting within a frequency normally used for information transmission.

The network control unit 100 of the WDMA central station apparatus CS receives the information received from the wavelength selection unit (WSU) 220 of the optical layer connection unit 200 to be described later. Collects the entire network status, generates a connection request notification message to the request destination for the connection request of the received information and transmits it through the connection wavelength selector 220, and receives a connection approval or rejection message from the request destination. If so, the corresponding response message can be sent to the request source.

In addition, the entire network state information is retrieved and a connection request message is sent to a destination for a request for a destination that is already connected to another node and is transmitting and receiving data, and an immediate connection is made without receiving a connection request approval or rejection message. A reject message can be sent.

The optical layer connection unit 200 receives optical signals transmitted from the plurality of WDMA user access devices 300, distributes and selects the optical signals, and transmits the selected optical signals to respective user terminals.

The optical layer connection unit 200 is largely comprised of an NxN passive star coupler 210 and a plurality of connection wavelength selectors 220.

Here, the NxN passive optical coupler 210 distributes the power of each of the input optical signals connected to the plurality of WDMA user access devices 300 in a WDMA manner to each output port by one-Nth. .

The plurality of connection wavelength selectors 220 converts the optical signals distributed from the output port of the NxN passive optical coupler 210 into wavelength demultiplexing and electrical signals, and converts the converted electrical signals and the network controller 100. Select any one of the electrical signals provided from the) to convert the optical signal of the unique wavelength assigned to transmit the function.

The plurality of connection wavelength selectors 220 include a passive 1: N wavelength demultiplexer (221), N photo-detector circuit arrays (222), and (1+). N): 1 electric signal switch ((1 + N): 1 Electonic Switch) 223 and fixed-wavelength transmitter 224.

Here, the passive 1: N wavelength demultiplexer 221 separates the optical signal distributed from the output port of the NxN passive optical coupler 210 for each wavelength.

The N optical signal detection circuits 222 convert the optical signals separated from the passive 1: N wavelength demultiplexer 221 into electrical signals and convert the optical signals into electrical signals according to the control signals of the network controller 100. Or transmits to the (1 + N): 1 electrical signal switch 223.

The (1 + N): 1 electrical signal switch 223 is configured to transmit electrical signals transmitted from the N optical signal detection circuits 222 and the network controller 100 according to the control signal of the network controller 100. Select and transmit any one of the transmitted electrical signals.

The wavelength-fixed optical signal transmitter 224 receives an electrical signal transmitted from the (1 + N): 1 electrical signal switch 223 and converts the optical signal into an optical signal having a predetermined wavelength, and transmits the converted electrical signal. .

FIG. 3 is a block diagram illustrating in detail a WDMA user access device for an optical layer connection service in an optical network using a WDMA scheme according to an embodiment of the present invention.

Referring to FIG. 3, the WDMA user access device 300 according to an embodiment of the present invention may include a photo-detector circuit 310 and a 1: 2 electronic signal demultiplexer. 320, a User-Station Interface 330, a Wavelength-Fixed Transmitter 340, a 2: 1 Electronic Multiplexer 350, and A WDMA Access Controller 360 is provided.

Here, the optical signal detection circuit 310 receives the optical signal transmitted from the WDMA central station apparatus CS (see FIG. 1) and converts the optical signal into an electrical signal.

The 1: 2 electrical signal demultiplexer 320 receives a converted electrical signal from the optical signal detection circuit 310 and transmits the received electrical signal according to a control signal of the WDMA access controller 306.

The user terminal connection unit 330 receives an electrical signal transmitted from the 1: 2 electrical signal demultiplexer 320 and transmits the received electrical signal to the user terminal 400 (see FIG. 1), and the optical layer from the user terminal 400. This function receives and sends connection request information and data.

The wavelength-fixed optical signal transmitter 340 converts an electrical signal transmitted from the 2: 1 electrical signal multiplexer 350 into an optical signal and transmits an optical signal having a predetermined wavelength.

The 2: 1 electrical signal multiplexer 350 may convert any one of the electrical signals received from the user terminal access unit 330 and the WDMA access control unit 360 according to the control signal of the WDMA access control unit 360. A function of transmitting to the fixed optical signal transmitter 340 is performed.

The WDMA access control unit 360 receives the layer connection request information transmitted from the user terminal access unit 330 to generate the layer connection request signaling information, and the connection response signaling provided from the WDMA central station device CS. It transmits information to the user terminal 400, and controls the operation of the 1: 2 electrical signal demultiplexer 320 and the 2: 1 electrical signal multiplexer 350 according to the data transmission and reception state.

The WDMA user access device 300 configured as described above provides an upper layer protocol and an independent optical layer connection service of an existing user terminal through interfaces of standardized user terminals, and provides general in-band signaling (In−). Band Signaling) can communicate with the WDMA central station device (CS).

4 is a flowchart illustrating a connection control method for explaining an optical layer connection service method in an optical network using a WDMA scheme according to an embodiment of the present invention.

Referring to FIG. 4, first, a request of a user terminal 400 (see FIG. 1) is performed by a source WDMA user access apparatus 300a in an idle state among a plurality of WDMA user access apparatuses 300 (see FIG. 1). The optical layer connection request signal is received and transmitted to the destination WDMA user access device 300b in an idle state through the WDMA central station device CS (S100 and S200).

That is, the WDMA access control unit 360 (refer to FIG. 3) of the source WDMA user access device 300a in the idle state receives the network connection request signal from the network control unit 100 of the WDMA central station device CS. A connection request message to be sent to the WDMA central station device (CS) via a 2: 1 electrical signal multiplexer (350, see FIG. 3) and a wavelength fixed optical signal transmitter (340, see FIG. 3). Transmit (S100).

Subsequently, the WDMA central station device CS receives a connection request message sent from the source WDMA user access device 300a in the idle state, and requests to connect to the destination WDMA user access device 300b in the idle state. A notification message is generated and transmitted (S200).

In this case, the optical layer connection request signal includes information such as an address, a request connection type, and a connection request class of the destination WDMA user access device 300b. The address of the destination WDMA user access device 300b is unicast, broadcast, or multicast, and the requested connection type includes a point-to-point connection, It is made of a ring-type connection and the like, the connection request level is preferably made of the priority and reservation information of the connection.

Next, the dormant destination WDMA user access device 300b receives the transmitted layer connection request signal and transmits a connection response signal for granting or rejecting the layer connection. And transmits to the source WDMA user access device 300a in the dormant state (S300 and S400).

That is, the dormant destination WDMA user access device 300b receives a connection request notification message transmitted from the WDMA central station device CS and generates a message for granting or rejecting a connection. The data is transmitted to the WDMA central station apparatus CS (S300).

Subsequently, when the WDMA central station device CS receives the connection grant message transmitted from the dormant destination WDMA user access device 300b, the WDMA user source, that is, the dormant source WDMA user, is received. Sending a connection acknowledgment (response) to the access device (300a) (S400), the source WDMA user access device 300a of the idle state receives the connection acknowledgment (response) and then transmits and receives data to the corresponding user terminal 400 Send a start message.

On the other hand, when the WDMA central station apparatus CS receives the connection rejection message from the idle destination WDMA user access device 300b, the WDMA central station device CS transmits a connection rejection response to the idle WDMA user access device 300a. After sending a response (S400) and receiving the connection rejection response, the idle WDMA user access device 300a may reserve a connection or attempt to connect to a WDMA user access device having a different address.

As described above, the WDMA central station device CS receives various pieces of information data between user terminals from the plurality of WDMA user access devices 300, collects overall network state information, and transmits the optical layer connection request signal. When received, a predetermined connection request notification message is generated and transmitted to the destination WDMA user access device 300b, and the grant or rejection of the layer connection from the destination WDMA user access device 300b is performed. It receives the connection response signal and transmits the connection response signal to the source WDMA user access device 300a.

In addition, the WDMA central station apparatus CS retrieves the collected network state information to the WDMA user access apparatuses 300c and 300d which are already connected from the WDMA user access apparatus 300 and are transmitting and receiving various information data. When the connection request signal is provided, the connection rejection response signal may be transmitted to the corresponding source user WDMA access device 300.

In addition, the WDMA central station device (CS) performs the optical layer connection control, network status monitoring and management operations between the user terminals 400 connected to the optical network by using a conventional in-band signaling (In-Band Signaling) method You may.

On the other hand, the signaling network for the connection request signal and the connection response signal transmitted and received between the WDMA central station (CS) and the WDMA user access devices (300a to 300d) in-band to use the same optical layer connection as the data transmission network It is preferable to perform in-band signaling.

That is, by applying the in-band signaling method using the same optical layer connection as the data transmission network, there is an effect that it is not necessary to use a separate network for signaling.

Although the above-described preferred embodiments of the WDMA central station apparatus, the WDMA user access apparatus, and the service method thereof for the optical layer connection service in the optical network using the WDMA scheme according to the present invention have been described, the present invention is limited thereto. It is also possible to carry out various modifications within the scope of the claims and the detailed description of the invention and the accompanying drawings, which also belong to the invention.

According to the WDMA central station apparatus, the WDMA user access apparatus, and the service method thereof for the optical layer connection service in the optical network using the WDMA scheme of the present invention as described above, the in-band signaling method, the central By using a centralized control structure and a wavelength fixed optical device, crosstalk and noise levels between wavelengths of the entire optical network can be strictly designed and managed, and optical signal quality stability, short connection setup time, and inexpensive and simple WDMA user access device can be achieved. There is an advantage to implement.

In addition, according to the present invention, in addition to providing security, stability, monitoring, and fast connection services for the entire network by a centralized management and control structure, in-band signaling independent of a higher layer is provided. Due to the adoption of the scheme, it is not only protocol-transparent but also capable of accommodating user terminals with various protocols, and is differentiated based on information such as the request connection type and the request connection order of the user terminals. There is an advantage that can provide.

Claims (17)

An optical layer connector including a passively formed optical coupler for receiving optical signals transmitted from a plurality of WDMA user access apparatuses, distributing, selecting and transmitting the optical signals to a plurality of user terminals; And And a network controller for transmitting and receiving control information and network state information related to the optical layer connection received from the plurality of WDMA user access devices through the optical layer connection unit including the passively formed optical coupler. The WDMA central station apparatus for the optical layer connection service in the optical network using the WDMA method, characterized in that for providing a connection service in the optical layer according to the quality requirements of the plurality of user terminals. The optical layer connection unit of claim 1, wherein the optical layer connection unit includes the passively formed optical coupler An NxN passive optical coupler for distributing the power of each input optical signal connected to the plurality of WDMA user access devices in a WDMA manner to each output port by one-nth; And Convert the optical signals distributed from the output port of the NxN passive optical coupler into wavelength demultiplexing and electrical signals, and select any one of the converted electrical signals and the electrical signals provided from the network controller A WDMA central station apparatus for an optical layer connection service in an optical network using a WDMA method, comprising: a plurality of connection wavelength selectors for converting and transmitting an optical signal having a wavelength. The method of claim 2, wherein the plurality of connection wavelength selection units, A passive 1: N wavelength demultiplexer for separating the optical signal distributed from the output port of the NxN passive optical coupler for each wavelength; N optical signals for converting optical signals separated from the passive 1: N wavelength demultiplexer into electrical signals for transmission to the network controller or (1 + N): 1 electrical signal switch according to a control signal of the network controller Circuits; (1 + N): 1 electrical signal switch for selecting and transmitting any one of an electrical signal transmitted from said N optical signal detection circuits and an electrical signal transmitted from said network controller according to a control signal of said network controller; And An optical signal using a WDMA method, comprising: a wavelength fixed optical transmitter for receiving an electrical signal transmitted from the (1 + N): 1 electrical signal switch and converting the optical signal into an optical signal having a predetermined wavelength. WDMA central station device for light-layer connection services in a network. The optical network using the WDMA method of claim 1, wherein the network controller manages the information of the entire network by real-time monitoring of the optical layer connection information between all the WDMA user access devices connected to the optical network. WDMA central station device for light layer connection services. The method of claim 1, wherein the network control unit, Centralized control of the optical layer connection unit transmits and receives control information related to the optical layer connection, collects the optical layer network state information, differentiates them according to the required quality, and provides an independent optical layer connection service to the upper layer. WDMA central station apparatus for optical layer connection service in optical network using WDMA scheme. The method of claim 1, wherein the network control unit, In the optical network using the WDMA method, the optical layer connection control, network status monitoring and management operations are performed between the plurality of WDMA user access devices and the plurality of user terminals connected to the optical network using the in-band signaling method. WDMA central station device for light layer connection services. An optical signal detection circuit for receiving an optical signal transmitted from the WDMA central station apparatus in charge of overall management and converting the optical signal into an electrical signal; A 1: 2 electrical signal demultiplexer for receiving the converted electrical signal from the optical signal detecting circuit and transmitting the electrical signal according to a predetermined control signal; A user terminal connection unit for receiving an electric signal transmitted from the 1: 2 electric signal demultiplexer and transmitting the received electric signal to a user terminal, and receiving and transmitting the optical layer connection request information and data from the user terminal; Receiving the layer connection request information transmitted from the user terminal connection unit, generating the layer connection request signaling information, and transmitting the connection response signaling information provided from the WDMA central station apparatus to the user terminal, A WDMA access control unit for controlling the operation of the 1: 2 electrical signal demultiplexer and the 2: 1 electrical signal multiplexer;  A 2: 1 electrical signal multiplexer for transmitting any one of an electrical signal received from the user terminal access unit and the WDMA access control unit according to a control signal of the WDMA access control unit; And Including a wavelength fixed optical transmitter for transmitting an optical signal of a predetermined wavelength by converting the electrical signal transmitted from the 2: 1 electrical signal multiplexer into an optical signal, An optical layer in an optical network using a WDMA method, each of which is connected to a plurality of user terminals and transfers data and optical layer connection information between the plurality of user terminals in a WDMA method using an optical signal having an assigned unique wavelength. WDMA user interface for connection services. A service method for optical layer connection in an optical network including a plurality of WDMA user access devices interconnected with a user terminal and a WDMA central station device using a WDMA method, (a) receiving an optical layer connection request signal according to a request of a user terminal from a source WDMA user access device of the plurality of WDMA user access devices and transmitting the request to the destination WDMA user access device through the WDMA central station device; (b) receiving the transmitted optical layer connection request signal from the destination WDMA user access device and transmitting a connection response signal for approval or rejection of the optical layer connection to the source WDMA user access device through the WDMA central station device; step; (c) transmitting a data transmission / reception start signal to a corresponding user terminal when the source WDMA user access device receives the connection acknowledgment signal; And (d) if the source WDMA user access device receives the connection rejection response signal, reserving a layer connection; The optical layer connection request signal and the connection response signal pass through a passively formed optical coupler of the DMA central station apparatus. An optical layer connection service method in an optical network using a WDMA method, characterized in that the. 10. The method of claim 8, wherein the optical layer connection request signal includes an address, a request connection type, and connection request class information of a destination WDMA user access device. . 10. The method of claim 9, wherein the address of the destination WDMA user access device is at least one of unicast, broadcast, and multicast. 10. The method of claim 9, wherein the required connection type is a point-to-point connection or a ring connection type. 10. The method of claim 9, wherein the connection request level comprises priority of connection and reservation information. The method of claim 8, wherein in steps (a) and (b), The WDMA central station apparatus receives various information data between user terminals from the plurality of WDMA user access apparatuses, collects overall network state information, and generates a predetermined connection request notification message when receiving the optical layer connection request signal. To the destination WDMA user access device, The optical layer in the optical network using the WDMA method, characterized by receiving a connection response signal for granting or rejecting the optical layer connection from the destination WDMA user access device and transmitting the connection response signal to the source WDMA user access device. Connection service method. 15. The method of claim 13, wherein the connection rejection response signal is received when receiving the connection request signal from the WDMA user access device to retrieve the collected whole network state information from the WDMA user access device and to transmit and receive various information data. The optical layer connection service method in the optical network using a WDMA method, characterized in that the transmission to the source WDMA access device. 9. The method of claim 8, further comprising the step of, in step (d), attempting to connect to the WDMA user access device of another address when receiving the connection rejection response signal from the source WDMA user access device. An optical layer connection service method in an optical network using a WDMA scheme. 9. The signaling network of claim 8, wherein the signaling network for the connection request signal and the connection response signal transmitted and received between the WDMA central station apparatus and the WDMA user access apparatuses is performed in an in-band signaling scheme to use the same optical layer connection as the data transmission network. An optical layer connection service method in an optical network using a WDMA method, characterized in that. 17. The WDMA method of claim 16, wherein the WDMA central station apparatus performs optical layer connection control, network state monitoring, and management operations between user terminals connected to an optical network using the in-band signaling method. Method of service of optical layer connection in optical network.

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