KR100419610B1 - A System and Method for Connecting Traffic Channel between Clients and Optical transport Network in the Optical Internet - Google Patents

Abstract

The present invention relates to a traffic channel connection in an optical transmission network, and more particularly, to a variety of multimedia Internet services using an optical transmission network based on a wavelength division multiplexing (WDM) method that provides a high-capacity high-speed Internet service. A system and method for establishing a traffic channel connection between a client and an optical transport network for provisioning. To this end, the present invention provides a system for establishing a traffic channel connection between a client and an optical transport network in an optical Internet for providing an optical Internet service between a source client and a destination client, wherein the source client requests an optical user network interface (O-UNI) connection request. An optical Internet call control unit (O-CP) for receiving and determining a call connection to an optical transmission network; And an optical connection control unit (OCC-C) for analyzing a connection request message transmitted from the optical internet call control unit (O-CP) and requesting a traffic channel connection setting to an optical transmission network, wherein the optical transmission network (OTN) includes: An optical connection control unit (OCC-N) connected to the client and controlling the traffic channel connection in the network (OTN) by being notified by inquiring about routing information of the connection in response to a request of the source client (SRC-C); A connection acceptance control unit (CAC) for obtaining channel information to a destination and allowing the traffic channel connection in response to the traffic channel connection request transmitted from the optical connection controller (OCC-N); A routing information manager for managing routing information of the traffic channel connection; A link management unit (LMNG) for managing the established and released links of the traffic channel connection and transmitting channel information allocated to a destination channel; and a network policy management unit (NPM) for storing and managing connection settings in the network (OTN). The destination client includes: an optical connection controller (OCC-C) for receiving a connection request message from the optical transmission network (OTN) and controlling an optical user network interface (O-UNI) connection request setting; And a called party information control unit (TIP) for processing information about a subscriber to be called.

Description

A system and method for connecting traffic channel between clients and optical transport network in the optical internet}

The present invention relates to a traffic channel connection in an optical transmission network, and more particularly, to a variety of multimedia Internet services using an optical transmission network based on a wavelength division multiplexing (WDM) method that provides a high-capacity high-speed Internet service. A system and method for establishing a traffic channel connection between a client and an optical transport network for provisioning.

Recently, as high-speed interchange service or broadband video service is used, demand for transmission capacity applied to communication network is increasing. In addition, a large capacity transmission is required in the construction of a high speed communication network. In view of these demands, various communication speed increasing methods have been proposed. One example is Wavelength Division Multiplexing (WDM), which bundles several different wavelengths and transmits them through one optical fiber.

This WDM transmission technology is currently being actively studied in that communication is possible over a wide bandwidth. In WDM transmission method, channels are arranged at regular wavelength intervals, each channel is loaded with signals, and then multiplexes are optically multiplexed to transmit through one optical fiber, and the receiving side decomposes each channel by wavelength to utilize each channel separately. It is possible to make the most of the bandwidth (that is, the transmittable interval).

With the development of internet technology, subscribers require multimedia services such as internet telephony, internet broadcasting, and remote lectures, and these multimedia services require a lot of bandwidth. This requires less time and error rates than the delay and packet loss rates allowed by traditional data services. However, there is a problem that the conventional backbone network does not efficiently handle the rapidly increasing Internet traffic in the Internet environment that provides high-capacity high-speed Internet service. I could not.

In order to solve the above problems, the present invention solves the bottleneck of excessive traffic in an optical transmission network as a backbone network, and WDM-based client and optical transmission capable of providing a new high-speed large-capacity Internet service to provide an efficient multimedia service. It is an object of the present invention to provide a system and method for connecting traffic channels between networks (backbone networks).

1 is a block diagram according to an embodiment of a traffic channel connection establishment system of the present invention.

2 is a flowchart illustrating a traffic channel connection establishment between a client and an optical transmission network according to the present invention.

Explanation of symbols on the main parts of the drawings

1: Source Client (SRC-C) 2: Optical Transport Network (OTN)

3: Destination Client (DST-C) 11: Optical Internet Call Control Unit (O-CP)

12: Optical connection control unit (OCC-C) of the source client 22: Connection acceptance control unit (CAC)

21: Optical connection control unit (OCC-N) of the optical transmission network 23: Routing information management unit (RIC)

24: link management unit (LMNG) 25: network management unit (NPM)

31: Optical connection controller (OCC-C) of the destination client

32: called party information control unit (TIP)

In order to achieve the above object, the present invention provides a system for establishing a traffic channel connection between a client and an optical transmission network in an optical Internet for providing an optical Internet service between a source client and a destination client.

The source client (SRC-C),

An optical Internet call control unit (O-CP) that receives an optical user network interface (O-UNI) connection request and determines a call connection to an optical transport network; And

An optical connection control unit (OCC-C) for analyzing a connection request message transmitted from the optical internet call control unit (O-CP) and requesting a traffic channel connection setting to an optical transmission network;

The optical transmission network (OTN),

An optical connection control unit (OCC-N) connected to the client and controlling the traffic channel connection in the network (OTN) by being notified by inquiring about routing information of the connection in response to a request of the source client (SRC-C);

A connection acceptance control unit (CAC) for obtaining channel information to a destination and allowing the traffic channel connection in response to the traffic channel connection request transmitted from the optical connection controller (OCC-N);

A routing information manager for managing routing information of the traffic channel connection;

A link manager (LMNG) for managing the established and released links of the traffic channel connection and transmitting channel information allocated to a destination channel; And

It includes a network policy management unit (NPM) for storing and managing the connection settings in the network (OTN),

The destination client (DST-C)

An optical connection control unit (OCC-C) for receiving a connection request message from the optical transmission network (OTN) and controlling an optical user network interface (O-UNI) connection request setting; And

A called party information control unit (TIP) for processing information about the subscriber to be received.

In addition, in order to achieve the above object, the present invention provides a method for establishing a traffic channel connection between a client and an optical transmission network in an optical Internet for providing an optical Internet service between a source client and a destination client.

A first step of forwarding a traffic channel connection request message to the optical transmission network when the source client receives the optical user network interface (O-UNI) connection request message;

Obtaining routing information of a connection requested by the source client when receiving the forwarded traffic channel connection request message in the optical transmission network;

A third step of obtaining resource information on a channel connection of a destination by using the obtained routing information of the connection in the optical transmission network, determining availability of the destination channel by determining availability of the resource;

Transmitting the traffic channel connection completion message from the optical transmission network to the source client;

A fifth step of delivering an optical user network interface (O-UNI) channel connection request message from the optical transmission network to a destination client;

A sixth step of processing the forwarded request message at the destination client to deliver the traffic channel connection complete message to the optical transmission network; And

The source client includes a seventh step of connecting a traffic channel with the destination client through the optical transmission network.

The present invention is composed of a source client (SRC-C), an optical transport network (OTN), a destination client (DST-C) for establishing a traffic channel with an optical transport network to provide a high-speed, high-capacity Internet service, and a source / destination client. A traffic channel connection establishment function is handled between optical transport networks using an optical user network (O-UNI) signaling protocol. That is, a traffic channel is established between the source client and the optical transmission network using optical user network interface (O-UNI) signaling, and the optical user network interface (O-UNI) signaling is also used between the optical transmission network and the destination client. Setting up a traffic channel completes the traffic channel connection establishment between the source client and the destination client.

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

1 is a configuration diagram according to an embodiment of hardware to which the present invention is applied. As shown in Fig. 1, the hardware to which the present invention is applied includes an ATM (Asynchronous Transfer Mode) switch source client (1) having an optical transport network and an optical-user network interface, and an optical fiber. An optical transport network (2) for controlling transport traffic and a destination client (3) of an ATM switch having an optical transport network and an optical user network interface.

The configuration and the action thereof will be described in more detail.

Reference numeral 1 is an ATM switch source client (hereinafter referred to as SRC-C) having an optical transport network and an optical user network interface (O-UNI), and has an optical fiber having a function of determining a call connection to an optical network therein. Optical Connection Control Unit 12 (Optical Connection Controller-Client Block: hereinafter referred to as OCC-C) for requesting connection establishment with an optical network with an Internet Call Control Unit (hereinafter referred to as O-CP). Has

The O-CP 11 receives a request message for connecting to an optical-user network interface (hereinafter referred to as O-UNI) from a user and provides the OCC-C 12 with an optical Internet service. An optical network connection is requested, and the OCC-C 12 analyzes the received message and requests a traffic channel connection setting for the optical Internet service to the optical transmission network 2.

Reference numeral 2 is an optical transport network (hereinafter referred to as OTN) for controlling optical transmission traffic, and an optical connection control block (OCC-N) for processing a connection control function therein. 21, a connection admission control block (hereinafter referred to as CAC) 22 to allow connection establishment, and a routing information management block (hereinafter referred to as RIC) for managing routing information. (23), a link management block (hereinafter referred to as LMNG) for managing the established and released links, and a network policy management block (hereinafter referred to as LMNG) for managing the connection settings in the network in a policy manner. , NPM) 25.

After the OCC-N 21 receives the traffic connection establishment request message from the OCC-C 12 of the source client SRC-C 1, routing information for the connection request message is first transmitted to the RIC 23. Inquire to receive the results of the inquiry. Subsequently, a request for establishing a destination channel connection is requested to CAC 22 using the received routing information. In response to the destination channel connection establishment request, the CAC 22 requests resource information from the LMNG 24 to obtain channel information of the destination. When the LMNG 24 determines the availability of the resource and allows the channel to be used, when the LMNG 24 transmits information on the channel usage to the NPM 25, the NPM 25 stores the resource information.

Subsequently, the LMNG 24 allocates resources for channel information allocated to the destination channel to the CAC 22, and the CAC 22 transfers them to the OCC-N 21 to allow the connection. Send a channel information message. The OCC-N 21 sends a connection notification to the OCC-C 12 of the source client SRC-C 1 for the traffic channel connection establishment request, and the OCC-C 12 again provides an optical Internet service. The O-UNI channel setup completion for the O-CP (11) is delivered.

Further, reference numeral 3 denotes an ATM switch destination client (hereinafter referred to as DST-C) having an optical transport network and an optical user network interface (O-UNI). C 31 and a called party information controller block (hereinafter referred to as TIP) 32 for processing information about the subscriber to be called at the destination client.

The OCC-N 21 requests a connection for establishing a channel to the OCC-C 31 of the DST-C client 3 of the destination channel obtained above. The OCC-C 31 receives the request message, requests an O-UNI connection for the optical Internet service to the TIP 32, and receives a response message for the connection request from the TIP 32. The OCC-N 21 of 2) notifies that the O-UNI channel connection of the destination is completed. Subsequently, the OTN 2 completes the connection with the SRC-C client 1 and the DST-C client 3, whereby the SRC-C client 1 and the DST-C client 3 connect to the connected traffic channel. Send and receive information.

2 is a flowchart illustrating a connection setting between a client and an optical transmission network according to the present invention, and illustrates a process of establishing a traffic channel connection between the client and the optical transmission network.

First, the O-CP 11 of the SRC-C client 1 receives the O-UNI connection request for the optical Internet service and transmits the optical Internet service request message to the OCC-C 12 (S1). The OCC-C 12 analyzes the message for the optical Internet service request and transmits a traffic channel connection request message to the OTN 2 that can provide a connection for the request (S2). Traffic channel connection requested by the SRC-C client 1 to the RIC 23 to receive routing information in the network by receiving a message about the traffic channel connection request from the OCC-N 21 of the OTN 2. Transfer the routing information query message for (S3).

Subsequently, the RIC 23 receives the message for the routing information query, obtains routing information of the requested connection, and transfers the routing information message to the OCC-N 21 (S4). The OCC-N 21 has routing information on the received connection and transmits a destination channel connection request message to the CAC 22 (S5). The CAC 22 transmits a resource request message for requesting resource information to the LMNG 24 in order to obtain channel information to a destination requesting the connection (S6). When the LMNG 24 determines the availability of the requested resource and allows the channel to be used as a destination, the LMNG 24 transmits a resource information storage message indicating that the channel is used by the NPM 25 (S7). The received NPM 25 stores that the channel is in use.

Subsequently, the LMNG 24 transmits a resource allocation message including channel information allocated to the destination channel to the CAC 22 (S8). Upon receiving the resource allocation message of the allocated channel information, the CAC 22 transmits a connection permission message carrying destination channel information to the OCC-N 21 of the OTN 2 (S9). The OCC-N 21 receives the channel information of the destination and transmits a message indicating the completion of the connection with the SRC-C (1) to the OCC-C (12) (S10). Subsequently, the OCC-C 12 transmits an O-UNI connection completion message indicating the completion of O-UNI channel establishment for the optical Internet service to the O-CP 11 (S11).

Meanwhile, the OCC-N 21 transmits a connection request message to the destination client of the obtained destination channel, that is, the DST-C 3 to establish an O-UNI channel (S12). The OCC-C 31 of the DST-C 3 receives the connection request message and transmits the optical Internet O-UNI connection request to the TIP 32 to inform the UNI connection request for the optical Internet (S13). . Subsequently, the TIP 32 notifies the OCC-C 31 that the O-UNI connection is completed for the optical Internet (S14). The OCC-C 31 transmits a connection completion notification message indicating that the O-UNI channel connection of the destination is completed to the OCC-N 21 of the OTN 2 (S15). Subsequently, the connection with the SRC-C (1) is completed and the connection with the DST-C (3) is completed around the OTN (2), so that the SRC-C (1) and the DST-C (3) are completed. Is transmitted and received through the connected traffic channel (S16).

The above description and the contents of the drawings have been described as an embodiment of the present invention, and those skilled in the art to which the present invention pertains may be changed or substituted within the scope without departing from the spirit of the present invention.

Therefore, the scope of the present invention should be determined by the claims rather than by the foregoing description.

As described above, according to the present invention, a bottleneck for excessive traffic in an optical transmission network can be solved. In addition, it is possible to provide a variety of multimedia services quickly and conveniently using the optical Internet as a new technology that can provide high-speed, high-capacity Internet services.

Claims (7)

A system for establishing a traffic channel connection between a client and an optical transmission network in an optical Internet for providing an optical Internet service between a source client and a destination client, The source client (SRC-C), An optical Internet call control unit (O-CP) that receives an optical user network interface (O-UNI) connection request and determines a call connection to an optical transport network; And An optical connection control unit (OCC-C) for analyzing a connection request message transmitted from the optical internet call control unit (O-CP) and requesting a traffic channel connection setting to an optical transmission network; The optical transmission network (OTN), An optical connection control unit (OCC-N) connected to the client and controlling the traffic channel connection in the network (OTN) by being notified by inquiring about routing information of the connection in response to a request of the source client (SRC-C); A connection acceptance control unit (CAC) for obtaining channel information to a destination and allowing the traffic channel connection in response to the traffic channel connection request transmitted from the optical connection controller (OCC-N); A routing information manager for managing routing information of the traffic channel connection; A link manager (LMNG) for managing the established and released links of the traffic channel connection and transmitting channel information allocated to a destination channel; And It includes a network policy management unit (NPM) for storing and managing the connection settings in the network (OTN), The destination client (DST-C) An optical connection control unit (OCC-C) for receiving a connection request message from the optical transmission network (OTN) and controlling an optical user network interface (O-UNI) connection request setting; And A system for establishing a traffic channel connection between a client and an optical transmission network in an optical Internet, characterized in that it comprises a called party information control unit (TIP) for processing information about a subscriber to be received. According to claim 1, wherein the optical connection control unit (OCC-N), Using the routing information of the requested connection, a message for requesting connection of a destination channel is transmitted to the connection acceptance control unit (CAC), and the connection is received and transmitted to the source client, and the optical client network interface is transmitted to the source client. A system for establishing a traffic channel connection between a client and an optical transport network in an optical Internet, characterized by delivering an O-UNI channel establishment request message. The method of claim 1, wherein the link management unit (LMNG), Determining the availability of resources for channel information to a destination and transmitting a resource allocation message obtained by cooling the channel information allocated to the destination channel to the connection acceptance control unit (CAC). A system for establishing a traffic channel connection between a client and an optical transport network on the Internet. A method for establishing a traffic channel connection between a client and an optical transport network in an optical Internet for providing an optical Internet service between a source client and a destination client, A first step of forwarding a traffic channel connection request message to the optical transmission network when the source client receives the optical user network interface (O-UNI) connection request message; Obtaining routing information of a connection requested by the source client when receiving the forwarded traffic channel connection request message in the optical transmission network; A third step of obtaining resource information on a channel connection of a destination by using the obtained routing information of the connection in the optical transmission network, determining availability of the destination channel by determining availability of the resource; Transmitting the traffic channel connection completion message from the optical transmission network to the source client; A fifth step of delivering an optical user network interface (O-UNI) channel connection request message from the optical transmission network to a destination client; A sixth step of processing the forwarded request message at the destination client to deliver the traffic channel connection complete message to the optical transmission network; And And the source client comprises a seventh step of connecting a traffic channel with the destination client through the optical transport network. The method of claim 4, wherein the third step, Requesting a destination channel connection requesting the connection; And And requesting resource information for the destination channel to obtain channel information to the destination. The method of claim 4, wherein And generating a channel use message and storing the channel in use when the requested destination channel is permitted, wherein the traffic channel connection is established between the client and the optical transmission network in the optical Internet. The method of claim 4, wherein And the source and destination clients and the optical transmission network control the traffic channel connection establishment using an optical user network interface (O-UNI) signaling protocol.