KR100450414B1 - A System and Method for Managing the Signaling Control Channel and Confirming the Connection of Traffic Channel using the Out-of-Fiber Signaling Control Channel in O-UNI between Client and Optical Transfer Network - Google Patents

Abstract

The present invention relates to a signaling control channel management and traffic channel connectivity checking method between a client and an optical transmission network, and more particularly, an optical-user-network interface (O-UNI) between the client and the optical transmission network. In this regard, the present invention relates to a signaling control channel management and a traffic channel connectivity checking method using an out-of-fiber signaling control channel. To this end, the present invention, an Ethernet management unit for controlling the out-of-fiber signaling control channel, a signaling channel control unit for managing the information of the signaling control channel, and a traffic channel setting unit for controlling the traffic channel setting between the client and the optical transmission network respectively In a signaling control channel management and traffic connectivity confirmation system using an out-of-fiber signaling control channel in an optical user-network interface (O-UNI) of the client, the client is connected to the optical transmission network and a signaling control channel and is preset. A user link manager which checks connectivity of the signaling control channel and the traffic channel with the optical transmission network by using an out-of-fiber signaling control channel and manages the states of the signaling control channel and the traffic channel; And a user USONET / SDH / WDM processor connected to the optical transmission network and managing the connected traffic channel, wherein the optical transmission network is connected to the user link manager through a signaling control channel and the preset out-of. An optical transmission network link manager configured to check connectivity of the signaling control channel and the traffic channel with the client using a fiber signaling control channel and to manage the states of the signaling control channel and the traffic channel; And an optical transmission network NSONET / SDH / WDM processing unit connected to the user USONET / SDH / WDM processing unit through a traffic channel and managing the traffic channel.

Description

A system and method for managing the signaling control channel and confirming the connection of traffic channel using on-network between client and optical transport network the Out-of-Fiber Signaling Control Channel in O-UNI between Client and Optical Transfer Network}

The present invention relates to a signaling control channel management and traffic channel connectivity confirmation system and method between a client and an optical transmission network, and more particularly, to an optical-user-network interface (O-UNI) between the client and the optical transmission network. The present invention relates to a signaling control channel management and traffic channel connectivity confirmation system and method using an out-of-fiber signaling control channel.

Recently, with the increase of traffic caused by the quantitative increase of Internet users, it is important to ensure the proper quality of service (QoS) in the network by using various types of applications. Due to demand, the demand for a large amount of traffic delivery service is increasing. Accordingly, solving the packet forwarding problem of a large capacity wireless access network supporting a wireless Internet service of several Mbps or more per mobile terminal subscriber has emerged as an important issue.

In the Internet communication based on the conventional Internet Protocol (IP), a signal and traffic are transmitted together, so when one of the signals and traffic in mutual dependency occurs, the other It is not sent properly. In particular, as described above, when the traffic load in the network is high due to the rapid increase in Internet traffic, there is a problem that the signaling message cannot be safely delivered.

On the other hand, due to the human desire for convenience and the development of technology and information and communication technology, large data transmission becomes an essential requirement. Given these needs, Wavelength Division Multiplexing (WDM) technology, which bundles several different wavelengths and transmits them through one optical fiber, is currently the most active in that it can communicate over a wide bandwidth. Is being studied. In addition, a new optical transmission network based on WDM has been introduced to provide high-speed, high-capacity Internet services, enabling efficient data and signaling processing.

In the optical transmission network, unlike the conventional IP communication, the signaling channel and the traffic channel can be separated and managed independently, so that even if one problem occurs, the other can be safely delivered regardless of the problem. In particular, in order to process signaling messages, it is necessary to manage signaling control channels and check connectivity of connected traffic channels. As a result, the traffic channel is set / modified / released so that a large amount of traffic can be processed using a signaling message in the out-of-fiber signaling control channel. The signaling control channel management using the out-of-fiber signaling control channel and the method of verifying the traffic channel connectivity are important functions to confirm that the signaling channel and the traffic channel are separated from each other on the O-UNI. Since the of-Fiber signaling control channel uses a traffic channel and other physical media, it is not affected by the load. However, there is no conventional method for managing a signaling control channel or checking connectivity of a traffic channel using an out-of-fiber signaling control channel between a client and an optical transmission network. Thus, efficient traffic and signaling processing is securely performed in O-UNI. There was a problem that could not be executed.

Accordingly, there is a growing need for signaling control channel management and traffic channel connectivity checking methods using an out-of-fiber signaling control channel in an O-UNI interface between a client and an optical transmission network.

The present invention has been made to solve the above problems, the signaling control channel management and traffic control using the Out-of-Fiber signaling control channel between the client and the optical transmission network in O-UNI newly defined as the service providing field of the optical Internet Its purpose is to provide a system and method for verifying channel connectivity.

1 is a system block diagram of a client and an optical transmission network to which the present invention is applied.

2 is a flowchart illustrating a signaling control channel management and traffic channel connectivity checking method using an out-of-fiber signaling control channel between a client and an optical transmission network according to the present invention.

Explanation of symbols on the main parts of the drawings

100: client 200: optical transmission network

3: Ethernet link 4: SONET / SDH / WDM link

10: client signaling controller 20: optical transmission network signaling controller

11: user Ethernet management unit 21: optical Ethernet management unit

12: user signaling control unit 22: network signaling control unit

13: user link management unit 23: network link management unit

14: user traffic channel setting unit 24: network traffic channel setting unit

15: client optical transmission channel 25: optical transmission network optical transmission path

16: USONET / SDH / WDM processing unit 26: NSONET / SDH / WDM processing unit

Signaling control channel management and traffic channel connectivity confirmation system according to the present invention for achieving the above object, Ethernet control unit for controlling the out-of-Fiber signaling control channel, signaling channel control unit for managing the information of the signaling control channel, In a signaling control channel management and traffic connectivity confirmation system using an out-of-fiber signaling control channel in an optical user-network interface (O-UNI) between a client and an optical transmission network each having a traffic channel setting unit for controlling traffic channel setting, The client is connected to the optical transmission network through a signaling control channel and checks connectivity of a signaling control channel and a traffic channel with the optical transmission network using a preset out-of-fiber signaling control channel, respectively, and controls the signaling control channel and traffic. User link manager to manage the state of the channel Section; And a user USONET / SDH / WDM processor connected to the optical transmission network and managing the connected traffic channel, wherein the optical transmission network is connected to the user link manager through a signaling control channel and the preset out-of. An optical transmission network link manager configured to check connectivity of the signaling control channel and the traffic channel with the client using a fiber signaling control channel and to manage the states of the signaling control channel and the traffic channel; And an optical transmission network NSONET / SDH / WDM processing unit connected to the user USONET / SDH / WDM processing unit through a traffic channel and managing the traffic channel.

In addition, the signaling control channel management method according to the present invention for achieving the above object, the signaling control channel management method using the Out-of-Fiber signaling control channel in the optical user-network interface (O-UNI) between the client and the optical transmission network A first step of establishing an out-of-fiber signaling control channel; A second step of requesting, from a client, a connectivity check of a signaling control channel to an optical transmission network using the configured out-of-fiber signaling control channel; The optical transmission network transmitting a response to the request for confirming connectivity of the signaling control channel to the client; And a fourth step in which the client and the optical transmission network mutually check and manage the link state of the signaling control channel at a set period.

In addition, the traffic channel connectivity confirmation method according to the present invention for achieving the above object, the traffic channel connectivity confirmation method using the Out-of-Fiber signaling control channel in the optical user-network interface (O-UNI) between the client and the optical transmission network A first step of establishing an out-of-fiber signaling control channel; Requesting, by a client, to verify connectivity of a traffic channel to an optical transmission network using the configured out-of-fiber signaling control channel and receiving a response accordingly; A third step of transmitting a traffic channel test message through the traffic channel connected to the optical transmission path of the optical transmission network in the optical transmission path of the client and receiving a response accordingly; And the client requesting the optical transmission network to terminate the traffic channel connectivity check and receiving a response accordingly.

The present invention provides signaling using an out-of-fiber signaling control channel in O-UNI between a client (ATM switch, Giga / tera router, Ethernet switch, etc.) and an optical transmission network in order to provide ultra-high-capacity multimedia optical Internet service to subscribers. It provides control channel management and traffic channel connectivity checking method. Clients and optical transport networks that provide optical Internet services form a physical Ethernet interface with an out-of-fiber signaling control channel. In addition, the O-UNI processes signaling control channel establishment and traffic channel connectivity between the client and the optical transmission network. As a result, the signaling message transfer between the client and the optical transmission network is not affected by the traffic load of the optical transmission network so that the signaling message can be safely delivered. As described above, two links exist in the O-UNI between the client and the optical transmission network, and one channel is set in each of the links. In this case, the one channel is a signaling control channel and the other channel is a traffic channel.

The above objects, features, and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail the present invention.

1 is a configuration diagram according to an embodiment of a system to which the present invention is applied and is an internal configuration diagram of a client and an optical transmission network. An optical user-network interface (O-UNI) is formed between the client and the optical transmission network. The internal configuration of the client and the optical transmission network is as follows. Referring to FIG. 1, the client 100 and the optical transmission network 200 include signaling controllers 10 and 20 for controlling signaling and optical transmission paths 15 and 25 for transmitting traffic, respectively. The client signaling control unit 10 having an O-UNI controls an out-of-fiber signaling control channel and is connected to the optical transmission network 200 through a signaling control channel (User Ethernet Management 11) hereinafter referred to as UethernetMng. And a user signaling channel controller 12 for managing information of the signaling control channel 12 (Uer Signaling Channel Controller; hereinafter referred to as UsigCtrl), and a user link manager 13 for managing the state of the connected signaling control channel and traffic channel. User Link Management (hereinafter referred to as UlnkMng) and a User Traffic Channel Establishment unit (14) (hereinafter referred to as UtrffcChEst) for controlling the traffic channel setup. The client optical transmission line 15 includes a USONET / SDH / WDM processor 16 for managing the traffic channel.

In addition, the optical transmission network 200 controls the optical exchange and optical transmission function. The optical network signaling control unit 20 controls an out-of-fiber signaling control channel and is connected to the user ethernet management unit 11 through the signaling control channel 21 (Network Ethernet Management; hereafter referred to as NethernetMng). A network signaling channel controller 22 for managing information of the signaling control channel (hereinafter referred to as NsigCtrl), and a network link manager 23 for managing states of the connected signaling control channel and traffic channel; Network Link Management (hereinafter referred to as NlnkMng), and a network traffic channel establishment unit 24 for controlling traffic channel establishment (hereinafter referred to as NtrffcChEst). The optical transmission network 25 includes an NSONET / SDH / WDM processing unit 26 for managing the traffic channel.

Meanwhile, reference numeral 3, which is not described, denotes an out-of-fiber signaling control channel connected between the client 100 and the optical transmission network 200, and reference numeral 4 denotes a physical Ethernet link. A traffic channel connected between the optical transmission network 200 is a SONET / SDH / WDM link.

The U / NlnkMng (13,23) manages the link between the connected Ethernet channel and the traffic channel. The U / NsigMng 12, 22 manages an out-of-fiber signaling control channel between the client and the optical transmission network. The USONET / SDH / WDM processor 16 and the NSONET / SDH / WDM processor 26 process a signaling message for checking connectivity of a traffic channel. Sends and receives service-related shape information for signaling message transmission between configured signaling control channels O-UNI. U / NtrffcChEst (14,24) handles traffic channel connection establishment / change / release. The client 100 and the optical transmission network 200 manage an out-of-fiber signaling control channel, confirm connectivity of traffic channels, negotiate service shape information, and process a traffic channel establishment procedure using a signaling message. The physical path that handles the traffic channel is a SONET / SDH / WDM link.

Hereinafter, the operation of the apparatus will be described in detail with reference to FIG. 2.

2 is a flowchart illustrating a process of checking signaling control channel management and traffic channel connectivity using an out-of-fiber signaling control channel in an O-UNI according to the present invention. In comparison with FIG. 1, the same code | symbol is described in the same apparatus. This will be described in more detail with reference to FIG. 2.

First, the UlnkMng 13 of the client signaling control unit 10 is informed of the setting of the out-of-fiber signaling control channel, and uses the preset out-of-fiber signaling control channel to request a connectivity confirmation request of the signaling control channel. The signal is transmitted to the NlnkMng 23 of the signaling controller 20 (S201). After receiving the Out-of-Fiber signaling control channel setting, the NlnkMng 23 of the optical transmission network signaling control unit 20 receives the UlnkMng of the client signaling control unit 10 using a preset Out-of-Fiber signaling control channel. If it is possible to determine whether the port information of the connected signaling control channel and the information for the signaling link connectivity confirmation included in the connectivity control request of the signaling control channel received from 13 are available, the client signaling controller 10 may be provided. The notification about the signaling control channel connectivity confirmation is forwarded to UlnkMng 13 (S202). Thus, signaling control channel connectivity confirmation is completed between the client 100 and the optical transmission network 200.

Also, the UlnkMng 13 of the client signaling controller 10 transmits a traffic channel connectivity confirmation message to the NlnkMng 23 of the optical network signaling controller 20 indicating that it is ready to deliver a test message for confirming the traffic channel connectivity. (S203). The NlnkMng 23 of the optical network signaling controller 20 receiving the traffic channel connectivity confirmation message transmits a test message to the UlnkMng 13 of the client signaling controller 10 to receive the test message for confirming the traffic channel connectivity. (S204).

Subsequently, the UlnkMng 13 of the client signaling controller 10 transmits a message requesting a traffic channel test to the UethernetMng 11 of the client signaling controller 10 (S205). The NlnkMng 23 of the optical network signaling controller 20 transmits a message requesting to prepare for receiving the traffic channel test message to the NethernetMng 22 of the optical network signaling controller 20 (S206). The NethernetMng 22 transmits a message to the NSONET / SDH / WDM processor 26 of the optical transmission network 25 to prepare to receive the test message (S207). Subsequently, the UethernetMng 11 of the client signaling controller 10 requests test message transfer to the USONET / SDH / WDM processor 16 of the client transmission line 15 (S208). The USONET / SDH / WDM processing unit 16 of the client transmission line 15 is a NSONET / SDH / WDM processing unit 26 of the optical transmission line transmission path 25 for a test message on the SONET / SDH / WDM link 4 connected thereto. In step S209). The NSONET / SDH / WDM processing unit 26 of the optical transmission line 25 transmits the received test message information to the NethernetMng 21 of the optical transmission network signaling control unit 20 (S210). The NethernetMng 21 of the optical transmission network signaling control unit 20 transmits availability information on the received information to the UetherentMng 11 of the client signaling control unit 10 (S211). The UethernetMng 11 of the client signaling control unit 10 determines whether the test for the SONET / SDH link 3 connected thereto is completed (S212), and when the test is completed, a traffic channel to the UlnkMng 13. The test completion message is transmitted (S214), and if the test is not completed, the process proceeds to the step S209 and the process is repeated until the test response message received from the optical transmission network 200 is completed ( After S209).

Subsequently, the NethernetMng 21 of the optical network signaling controller 20 determines whether the test for the SONET / SDH / WDM link 3 connected thereto is completed (S213), and when the test is completed, the optical network signaling The traffic channel test completion message is transmitted to the NlnkMng 23 of the control unit 20 (S215). If the test is not completed, the test message received from the client 100 is sent to step S210. The process is repeated until completion (after S210).

Subsequently, after completing the connectivity check of the traffic channel, the UlnkMng 13 of the client signaling controller 10 transmits the connectivity check termination request message of the traffic channel to the NlnkMng 23 of the optical network signaling controller 20. Transfer (S216). The NlinkMng 23 of the optical network signaling controller 10 transmits a response message to the UlnkMng 13 of the client signaling controller 10 in response to the termination of the connectivity check of the received traffic channel (S217). This completes the connectivity check of the traffic channel.

The link state of the signaling control channel is periodically managed between the NlnkMng 23 of the optical transmission network signaling controller 20 and the UlnkMng 13 of the client signaling controller 10 based on the connectivity confirmation information transmitted (S218). The UlnkMng 13 of the client signaling controller 10 reports the signaling control channel setting to the UsigCtrl 12 of the client signaling controller 10 (S219). The NlnkMng 23 of the optical network signaling controller 20 reports the signaling control channel setting to the NsigCtrl 22 of the optical network signaling controller 20 (S220). Subsequently, the UsigCtrl 12 of the client signaling control unit 10 uses the signaling control channel connected with the optical transmission network signaling control unit 20 to signal the service-related configuration information message required for establishing a traffic channel between the client and the optical transmission network. Information including protocol information, O-UNI link type, transparency support service, and diversity information of network routing is loaded and transmitted to NsigCtrl 22 of the optical transmission network signaling controller 20 (S221).

The NsigCtrl 22 of the optical transmission network signaling control unit 20 determines whether service related phenomenon information received from the UsigCtrl 12 of the client signaling control unit 10 is acceptable in the network (S222), and if possible, responds with a response message. UsigCtrl (12) of the client signaling control unit 10 (S223), if it is not acceptable conversely, the service related shape information re-selected by its own (NsigCtrl) 22 UsigCtrl (12) of the client signaling control unit 10 Transfer to (S224).

Subsequently, the NsigCtrl 22 of the optical network signaling controller 20 determines whether the corresponding time given for the service shape information has ended (S225), and if the corresponding time has not ended, proceeds to step S221. Continue to receive the response from the UsigCtrl (12) of the client signaling control unit 10 and continue to send and receive messages until both sides satisfy the request (S226), on the contrary, the time is terminated and the two sides meet the requirements If not, the NsigCtrl 22 of the optical network signaling controller 20 recognizes that the out-of-fiber signaling control channel management fails (S227).

Subsequently, the UsigCtrl 12 of the client signaling controller 10 determines whether or not to agree with the shape information by exchanging the shape information with the UsigCtrl 22 of the optical transmission network signaling controller 20 (S228). If the determination of the step (S228) does not agree with the shape information, it recognizes the failure of the management of the out-of-fiber signaling control channel (S229), and agrees with the shape information as a result of the determination of the step (S228) If so, it notifies the UtrffcChEst 14 of the client signaling controller 10 that the traffic channel control can be set indicating that the signaling control channel is completed (S230). The NsigCtrl 22 of the optical network signaling controller 20 may set the traffic channel control to inform the completion of the signaling control channel setting when the shape information is exchanged with the UsigCtrl 12 of the client signaling controller 10. Notify NtrffcChEst 21 of the optical transmission network signaling controller 20 (S231).

The detailed description and drawings of the present invention disclose a preferred embodiment to help understand the present invention, and do not limit the scope of the present invention, and the scope of the present invention is determined by the above detailed description. Rather, it should be determined in the appended claims.

According to the present invention, an O-UNI manages a signaling control channel using an Out-of-Fiber signaling control channel between an client and an optical transmission network, and checks the traffic channel connectivity to establish an independent signaling control channel and a traffic channel in the O-UNI. It provides connection management and can efficiently handle signaling and traffic. In this way, the signaling message can be safely delivered at all times without being affected by the traffic load of the optical transmission network.

The above detailed description and contents disclosed in the drawings are not intended to limit the present invention, and it is apparent to those skilled in the art that various modifications and changes can be made without departing from the spirit of the present invention. will be.

Claims (7)

Ethernet managers 11 and 21 for controlling the out-of-fiber signaling control channel, signaling channel controllers 12 and 22 for managing information of the signaling control channel, and traffic channel setting unit 14 for controlling traffic channel setting. In the signaling control channel management and traffic connectivity confirmation system using the Out-of-Fiber signaling control channel in the optical user-network interface (O-UNI) between the client and the optical transmission network having each 24, The client, Connected to the optical transmission network and a signaling control channel, the connectivity of the signaling control channel and the traffic channel with the optical transmission network is checked using a preset out-of-fiber signaling control channel, respectively, and the states of the signaling control channel and the traffic channel are determined. A user link manager 13 for managing; And A user USONET / SDH / WDM processor 16 connected to the optical transmission network and managing the connected traffic channel; The optical transmission network, The user link manager 13 is connected to the signaling control channel and checks connectivity of the signaling control channel and the traffic channel with the client by using the preset out-of-fiber signaling control channel, respectively, and controls the signaling control channel and the traffic. An optical network link manager 23 for managing a state of a channel; And Signaling control channel management and traffic connectivity checking system, characterized in that it comprises an optical transmission network NSONET / SDH / WDM processing unit 26 is connected to the user USONET / SDH / WDM processing unit 16 and manages the traffic channel. . The system of claim 1, wherein the system is When the user link manager transmits a signaling channel connectivity confirmation message to the optical network link manager and receives an acknowledgment according thereto, the user link manager and the optical network link manager check the link state of the signaling control channel at predetermined intervals. Signaling control channel management and traffic connectivity verification system, characterized in that. The system of claim 1, wherein the system is When the user link manager transmits a traffic channel connectivity confirmation message to the optical network link manager and receives an acknowledgment according thereto, the user USONET / SDH / WDM processing unit transmits a test message through the traffic channel to the optical network USONET / SDH / Signaling control channel management and traffic connectivity confirmation system, characterized in that for transmitting to the WDM processing unit, and the user USONET / SDH / WDM processing unit receives a response to the test message, the user link management unit terminates the traffic channel connectivity check . A signaling control channel management method using an out-of-fiber signaling control channel in an optical user-network interface (O-UNI) between a client and an optical transmission network, Establishing a Out-of-Fiber signaling control channel; A second step of requesting, from a client, a connectivity check of a signaling control channel to an optical transmission network using the configured out-of-fiber signaling control channel; The optical transmission network transmitting a response to the request for confirming connectivity of the signaling control channel to the client; And And the fourth step of the client and the optical transmission network mutually checking and managing the link state of the signaling control channel at a set period. The method of claim 4, wherein the third step, The optical transmission network checks the signaling control channel connectivity to the client when it is possible to provide port information of the connected signaling control channel and information for signaling link connectivity confirmation included in the signaling control channel connectivity confirmation request received from the client. Signaling control channel management method characterized in that it delivers a response. A traffic channel connectivity checking method using an out-of-fiber signaling control channel in an optical user-network interface (O-UNI) between a client and an optical transmission network, Establishing a Out-of-Fiber signaling control channel; Requesting, by a client, to verify connectivity of a traffic channel to an optical transmission network using the configured out-of-fiber signaling control channel and receiving a response accordingly; A third step of transmitting a traffic channel test message through the traffic channel connected to the optical transmission path of the optical transmission network in the optical transmission path of the client and receiving a response accordingly; And And the client requesting the optical transmission network to terminate the traffic channel connectivity check and receiving a response according to the fourth step. The method of claim 6, wherein the third step, Delivering the traffic channel test message to the client optical path; Transmitting the test message to the optical transmission network through the connected traffic channel; And The optical transmission network comprises the step of transmitting the availability information of the traffic channel to the client via the transmitted traffic channel test message.