KR20020051614A - The OA&M Mechanism For ATM-PON Acess Network - Google Patents

Abstract

PURPOSE: A method for operating, managing and maintaining an ATM-PON access network is provided to conveniently operate and maintain an ATM-PON access network with the consistency of operation/management information. CONSTITUTION: An ATM-PON access network operation, management and maintenance block(205) contains an IPC message processing module(301), an operator management module(302), a feature management module(303), a connection management module(304), a performance management module(305), a fault management module(306), a test management module(307), a subscriber management module(308), and an operation information management module(309). The IPC message processing module(301) receives an operator's request through an IPC message communication block, interprets it, and transfers it to a relevant management module. The operator management module(302) manages information necessary for the authentication of operators through an operation and maintenance management block. The feature management module(303) manages the system features of an OLT and ONUs forming the ATM-PON access network. The connection management module(304) manages all ATM connections established in the ATM-PON access network. The performance management module(305) collects and manages SDH/E1/PON associated performance information for various kinds of ports. The fault management module(306) manages various faults. The test management module(307) requests a loopback test function, a connectivity test function or a performance monitoring test function to an ATM-PON system monitoring control block according to an operator's request. The subscriber management module(308) transfers registration/deletion/modification requests for service subscribers to the ATM-PON system monitoring control block. The operation information management module(309) executes a function to guarantee the consistency of operation/management information.

Description

ATM-POON access network operation management and maintenance method {The OA & M Mechanism For ATM-PON Acess Network}

The present invention efficiently manages multiple mother station devices and local station devices constituting ATM-PON access network by using object-oriented technology, and effectively manages and maintains the ATM-PON access network itself without TMN-based network management function. It relates to a method for doing so.

The rapid development of information and communication has made the management of the network environment increasingly complicated and difficult. Furthermore, the management of ATM-PON access network, which provides various kinds of communication services through various interfaces, has become a big burden for network operators. Therefore, the development of a system that easily shows the operational status of the network environment and suggests solutions through problem analysis has been a constant requirement of users.

The development of TMN technology has been accepted as an alternative to solve this problem. TMN is a network management structure proposed to provide management functions for communication networks and services and communication between networks and services. The basic concept of TMN is management information using standardized interface between various kinds of management systems and communication equipment. To provide a structured architecture for the exchange of

However, even in the absence of TMN-based network management, communication services must be provided without difficulty through the devices that make up the network.

In the present invention, to provide a consistent operation information to the network operator in operating the ATM-PON access network using the object-oriented technology, which is a standardized technology. Conventionally, TMN technology is applied to the network management field, but this is the approach from the viewpoint of managing the communication network at the upper layer. In other words, even in the absence of a network management function, each device constituting the network should be able to provide a service without intervention. Therefore, operation management and maintenance functions are very important at the network device level.

In addition, there is a case where the operation information of the communication device constituting the actual network and the operation information managed by the network operator do not coincide, but there is no way to solve the inconsistency of the network operation information.

Korean Patent Registration No. 1994-0006516 discloses a remote maintenance method and apparatus for a private exchange system, which is connected to a public telephone network (PSTN), outputs inquiry data, and diagnoses the status of the system by the response data received. It outputs the result data for function setting and maintenance, and sets up the system maintenance and function through this data.

However, since a telephone service, an ISDN service, a leased line service, a broadcast service, an on-demand video service, and an Internet service are provided to subscribers through an ATM-PON access network to which the present invention is applied, high communication access technologies are required. As a result, operation management and subscriber management of devices configuring the ATM-PON access network are complicated and it is difficult to maintain consistent operation management information. Therefore, without addressing these technical challenges, it is difficult for operators who operate the network to understand them. In addition, providing a complex management interface to operators who operate these networks adds an additional burden to them.

In addition, the mismatch between the actual operation state of the communication device or network and the operation information managed by the network operator during the operation of the network causes a serious problem in terms of managing the network.

In order to solve the above problems, a standardized interface is used to provide consistency between the state of the network and the operation information managed by the operator so that the operator can accurately understand and manage the operation state of the ATM-PON access network. This is necessary.

It is an object of the present invention to provide a method for maintaining and maintaining a consistent operation management information and conveniently operating and maintaining an ATM-PON access network composed of a plurality of mother station devices and local station devices without using TMN technology. .

1 is a block diagram of an ATM-PON access network to which the present invention is applied;

2 is a structural diagram of an ATM-PON access network operation management and maintenance system to which the present invention is applied;

3 is a functional structure diagram of an ATM-PON access network operation management and maintenance system to which the present invention is applied;

Figure 4a and 4b is an embodiment flow diagram for a method for processing in the operation management and maintenance system in response to the request of the network operator in accordance with the present invention; And

5A and 5B are exemplary flowcharts of a method of receiving an IPC message from an ATM-PON access network device monitoring and control system according to the present invention and processing it in an operation management and maintenance system.

According to a preferred embodiment of the present invention, an ATM-PON based access network is operated through an IPC message communication block in a system mounted on a processor board inside an OLT and operating and maintaining an ATM-PON access network. A system GUI management block connected to the management and maintenance block to exchange operator network operation commands in the form of IPC messages, interpreting the message, and informing the network operator; An ATM-PON-based access network management agent block and an ATM-PON device supervisory control block which are connected to the ATM-PON-based access network operation management and maintenance block through an IPC message communication block and exchange network operation information, respectively; An operation and maintenance information management block for managing all operation management information of the network according to the requirements of the ATM-PON based access network operation management and maintenance block; An ATM-PON based access network operation management and maintenance block including a plurality of management modules configured to interpret the IPC message and perform a corresponding function independently, and to set an IPC message communication block and an appropriate connection protocol as necessary; And an IPC message communication block for transferring network operation information between the respective blocks.

In addition, according to another embodiment of the present invention, there is provided a method for operation management and maintenance of the ATM-PON access network, the method receives a network operation command from the network operator to the mother station device that is subject to each management; The process of transmitting, blocking each network management function performed by the mother station apparatus, delivering the operation command to the corresponding management block, processing each independently, receiving and storing the processed result, and simultaneously informing the network operator. Is characterized in that it comprises a process.

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

1 is a block diagram showing an internal configuration and an access configuration of an ATM-PON based access network to which the present invention is applied. The ATM-PON based access network is composed of one mother station device (OLT, 101) and several local station devices (ONU, 103, 104). At this time, the mother station apparatus 101 and the station apparatuses 103 and 104 are connected through an STM-4 grade line 114 to transmit an optical signal using an optical wavelength of 1550 nm downward, and 1310 nm upward. The optical wave is transmitted using the tube wavelength. At this time, the local device type 1 is connected to a maximum of 64 identical optical signals through the PON splitter 102 in the middle. In the case of the host device type 2, the optical signal is transmitted as it is. The mother station apparatus 101 and the ATM exchanger 105, the broadcast service node 106, the video server 107 on demand, and the internet service node 108 are connected by using an STM-1 class line 112. The device 103, the ISDN exchange 109, and the telephone exchange 110 are connected using an E1 line 113.

Local station type 1 allows connection via VDSL modem, landline, N-ISDN, and leased line, and local station type 2 allows connection to 10 Base-T, ATM 25M, IEEE 1394, and regular phone. The ATM-PON-based access network operation management and maintenance system is mounted on the processor board inside the mother station device 101 to perform the overall operation management and maintenance functions of the ATM-PON-based access network.

Through such an access network, subscribers 111 receive broadcast service, video on demand service, internet service, ISDN service, leased line service, and telephone service.

2 is a diagram illustrating the operation management and maintenance system architecture of the ATM-PON access network, wherein the ATM-PON-based access network operator 201, the system GUI management block 202, the operation and maintenance information management block 204, and the ATM- PON based access network operation management and maintenance block 205 and IPC message communication block 207. The other blocks, the agent block 203 and the ATM-PON device supervisory control block 206 for ATM-PON based access network management, provide operation information with the ATM-PON based access network operation management and maintenance block 205. Will receive. The system GUI management block 202 establishes a TCP / IP connection with the ATM-PON based access network operation management and maintenance block through the IPC message communication block 207 to transfer the operator's command in the form of an IPC message or vice versa. It interprets network operation-related IPC messages received from the PON-based access network operation management and maintenance block 205 and presents them to the operator in the form of GUI or text.

The operation and maintenance information management block 204 collectively manages access network operation management information according to the request of the ATM-PON based access network operation management and maintenance block 205. The ATM-PON based operation management and maintenance block 205 interprets the IPC message received from the system GUI management block 202 to manage operator management, configuration management, performance management, failure management, test management, subscriber management, operation information management. It performs a function and the like, and for this purpose, establishes a UDP / IP connection with the ATM-PON device monitoring control block 206 and sends and receives an IPC message through the IPC message communication block 207.

In addition, in order to exchange operational information with the ATM-PON-based access network management agent block 203 that provides the network management function, a UDP / IP connection is established and an IPC message is transmitted and received through the IPC message communication block 207. .

Figure 3 is a detailed functional structure of the ATM-PON access network operation management and maintenance block 205 is mounted on the processor board of the mother station apparatus constituting the ATM-PON access network, the network operator requests the system GUI block or ATM- Received through PON-based access network management agent block and interpreted to process it internally, or delivered to ATM-PON device monitoring control block. Display to network operator terminal through system GUI block or ATM-PON based access network network management agent block.

The IPC message processing module 301 receives the operator's request through the IPC message communication block and interprets it and delivers it to the management module corresponding to each request, or again, creates an IPC message and delivers it to another management block. Receives the result of the event or event notification in the management block 206 to IPC message it to be displayed on the network operator terminal through the counter management block.

The operator management module 302 provides a function of receiving information necessary for authentication of operators who can manage and manage an ATM-PON access network through a system GUI management block and managing the information through an operation and maintenance management block.

The configuration management module 303 manages the system configuration of the mother station devices and the local station devices that constitute the ATM-PON access network. The configuration management module 303 includes STM1, STM4, E1, VDSL, It also manages the status information of ISDN and PSTN ports and the duplication information of each board.

In addition, it configures the initial configuration information of each device and requests the operator for each configuration management object, that is, the addition of the own station device, the initialization of the module unit, the additional deletion of the module unit, the board initialization, the board attachment / detachment, duplication, port Delivers the block / unblock of the unit to the corresponding ATM-PON device monitoring control block, processes the processing result or the event notification related to the function, and manages the operation and maintenance information through the operation information management module 309. Save, delete, and change management information in a block.

The connection management module 304 manages all ATM connections established in the ATM-PON access network. The types of ATM connections to be managed are pass connection (VP) and channel connection (VC), which are divided into permanent virtual connection (PVC) and signaling virtual connection (SVC), respectively, and these connections are again one-to-one (PTP). It is divided into connection and one-to-multiple (PTMP) connection. Therefore, there are eight types of ATM connections that are totally managed. The connection management module 304 transmits an operator's request to establish, release, and add / delete a party's ATM connection to the corresponding ATM-PON device supervisory control block, and informs about the result of the processing or the event notification related to the function. After processing, the management information is stored, deleted, and changed in the operation and maintenance information management block 206 through the operation information management module 309.

The performance management module 305 collects and manages SDH, E1, and PON related performance information for various types of ports in each device, and collects and manages ATM performance information for each ATM connection. In addition, the periodic performance information on the port or connection is received from the corresponding ATM-PON device monitoring and control block, and divided into 15 minute information and 1 day information and managed by the operation information management module 309 in the operation and maintenance information management block. Save the information. It also performs performance threshold management.

The fault management module 306 manages faults such as temperature and humidity, as well as faults on boards and ports, as well as fan or power supply resources that constitute each device. These types of faults are classified into communication-related, device-related, and environmental-related obstacles. All the obstacles defined in the international standard are delivered in the form of event notification, and are operated and maintained through the operation information management module 309. Store, delete, and change management information in the information management block. In addition, it performs the function of adjusting the grade of each fault and changing the condition of fault reporting.

The test management module 307 requests the loopback test, the connectivity test, and the performance monitoring test function to the corresponding ATM-PON device monitoring control block according to the operator's request, and processes and processes the processing result or event notification related to the function. The information management module 309 stores, deletes, and changes management information in the operation and maintenance information management block.

The subscriber management module 308 receives a request for registration, deletion, and change of subscribers who receive various services provided through the ATM-PON access network and requests the corresponding ATM-PON device supervisory control block, and the processing result or the function thereof. After processing the incident notification related to the through the operation information management module 309 stores, deletes, and changes the subscriber-related information in the operation and maintenance information management block.

When the operation information management module 309 operates an ATM-PON access network, there may be a mismatch between operation management information managed by the network management system and actual hardware information managed by the ATM-PON device monitoring control block. In this case, it is responsible for ensuring the consistency of operation management information of both sides. In addition, each function management module performs a function of matching operation and maintenance information management blocks with each management unit when storing, deleting, changing, or retrieving new management information in a database.

The IPC message processing module 301 interprets the IPC message received from the system GUI management block, the ATM-PON access network management agent block, and the ATM-PON device monitoring control block, and delivers the IPC message to the corresponding operation management module. After processing according to the function, IPC message is sent to ATM-PON device supervisory control block, system GUI management block, ATM-PON access network management agent block. In addition, it analyzes the event notification IPC message unilaterally delivered from the ATM phone device detection control block and also delivers it to the corresponding management module.

4 illustrates a method of processing an ATM-PON access network operation management and maintenance block according to an operator's request transmitted through a system GUI management block or an ATM-PON access network network agent block. First, the request of the operator is received in the form of an IPC message, it is analyzed (401) and then branches to the corresponding function.

If the operator management 402 request is again interpreted (403) the IPC message, and if the operator added (404) request, the operator information is stored (405) through the operation information management module, and the result is made an IPC message (406).

If it is requested to delete the operator (407), the operator information is deleted through the operation information management module (408), and the result is an IPC message (409). If the operator information change 410 request. After changing the information of the operator through the operation information management module (411), the result is an IPC message (412). The IPC message generated in this process is displayed on the operator screen through the system GUI management block or the ATM-PON access network management agent block (413,414).

In the case of the shape management 415 request, the IPC message is interpreted again (416), and if the resource initialization (417), and generates (418) an IPC message requesting the initialization of the unit (node, module, board) to manage. If the block / unblock request 419 is generated, the corresponding IPC message is generated (420). In this case, the unit of the block / unblock is a port or an ATM connection.

ATM connections managed by the operator's request include virtual channel (VC) connections and virtual path (VP) connections, which are persistent virtual connections (PVC) and are divided into one-to-one (PTP) and one-to-many (PTMP) connections.

In the case of the connection management 421 request, the IPC message is interpreted 422, and if the connection is set 423, an IPC message necessary for the connection is generated 424. If the connection is disconnected (425), an IPC message necessary for disconnection is generated (426). If it is a one-to-many connection, a new party can be added. In this case, the request 427 generates an IPC message necessary for adding the party (428). If the party release (429), and generates a party release IPC message (430).

In the case of the performance management 431 request, the IPC message is interpreted 432, and if the current performance information request 433 is generated, an IPC message is generated 434 for a desired port or ATM connection. If the periodic performance information request 435, the IPC message is generated (436) to send the performance information every 15 minutes and one day for all kinds of ports and ATM connections to manage. If the performance threshold change request 437, then generate an 438 an IPC message for the desired port or ATM connection.

The IPC messages generated during the process are forwarded to the ATM-PON device supervisory control block (439).

If the failure management (440) request is interpreted (441) of the IPC message, if the failure level change (442) generates (443) IPC messages required for the failure level change, if the failure report adjustment (444) IPC required to adjust the failure report Generate a message (445).

The test management 446 is used to check if there is any doubt about the state of the network, first interpreting the IPC message (447) and generating an IPC message necessary for the loopback test (449) if required for the loopback test (448) and continuity. In the case of the test 450, an IPC message necessary for the continuity test is generated 451. In the case of the performance monitoring 452, an IPC message necessary for the performance monitoring is generated 453.

As such, when the ATM access network is operated, an unexpected situation may occur and a mismatch of management information maintained by the ATM-PON network management agent block and the actual ATM-PON device monitoring control block may occur. This creates confusion for network operators. However, this problem can be solved by grasping the current operation information or reporting the periodic operation information according to the request of the network operator.

In the case of the operation information management 454 request, the IPC message is interpreted again 455 to generate an IPC message requesting the management information corresponding to the current operation information 456 (457), and the periodic operation information 458. If the request is generated, an IPC message is generated 459 to periodically send operation information in a module unit.

The IPC message generated in the above-described process is forwarded to the ATM-PON device supervisory control block (439).

Subscribers access various local nodes and receive communication services provided through ATM-PON access network. If the request for such subscribers is 460, the IPC message is again interpreted (461). If the subscriber is added (462), the subscriber information is stored through the operational information management module (463). 464) If the subscriber deletion request is made (465), the subscriber information is deleted through the operation information management module (466), and the result is made into an IPC message (467). Then, the IPC message is delivered to the system GUI management block and displayed on the operator screen (468,469).

Figure 5 receives the notifications generated during the operation or response to the operator's request from the ATM-PON device monitoring control block in the form of IPC message, process it in the ATM-PON access network operation management and maintenance block and the results It shows the process of changing to IPC mesh and delivering it to network operator through system GUI management block or ATM-PON access network management agent block.

First, when an IPC message is received 501 through an IPC message communication block, it is analyzed 502. And branch to the corresponding management function.

In the case of the shape management 503, if the shape initialization response 504 is performed, the shape related information is extracted and stored through the operation information management module 505, and an IPC message is generated 506 for the result. If the shape addition report (507) also extracts the shape-related information through the operation information management module (508), and generates an IPC message for the result (509). If the response is 510 for the block / unblock, the shape-related information is also extracted, and the corresponding state information is changed through the operation information management module (511), and an IPC message is generated for the result (512). If the report on the board attachment / detachment (513), the board shape-related information is extracted and stored or deleted through the operation information management module (514), and generates an IPC message for the result (515)

In addition to the permanent virtual connection (PVC) managed by the operator's request, the signaling virtual connection (SVC), which is configured and managed by the signaling function in the system, is managed in the ATM-PON access network operation management and maintenance block.

In the case of the connection management 516, if the connection establishment response (517), regardless of the permanent virtual connection (PVC) and the signal virtual connection (SVC), and extracts the connection-related information stored in the operation information management module (518), Generate an IPC message for the result (519). If the response to the disconnection (520), the connection-related information is also extracted to delete the connection information through the operation information management module (521), and generates an IPC message for the result (522). In the case of a one-to-many (PTMP) connection, in response to the party addition 523, the party-related information is extracted and stored through the operation information management module 524, and an IPC message is generated 525 for the result. If the response to the party deletion is 526, the party-related information is extracted, the connection information is deleted through the operation information management module (527), and an IPC message is generated for the result (528).

In the case of the performance management 529, if the response to the current performance information request (530), and extracts the performance-related information to generate an IPC message (531). It does not store current performance information. If the periodic performance information report (532), and extracts the performance-related information about the port or connection, and stores (533) through the operation information management module every 15 minutes or daily cycle, and generates an IPC message for the result (534). If the performance threshold change response 535, the performance threshold information is extracted and stored through the operation information management module (536), and generates an IPC message for the result (537).

In the case of the failure management 538, in response to the failure level change 539, the grade related information is extracted and changed through the operation information management module (540), and an IPC message is generated (541) for the result. If the response to the failure reporting adjustment (542), the relevant information is extracted to generate an IPC message (543). If the report on the occurrence of the failure (544), and extracts the failure-related information through the operation information management module (545), and generates an IPC message for the result (546).

The IPC message generated during the aforementioned function operation is transmitted through the system GUI management block or the ATM-PON access network management agent block (547) to be displayed on the operator screen (548).

In the case of the test management 550, if it is a response 551 to the loopback test, the test result information is extracted to generate an IPC message (552). If it is a response 553 to the continuity test, the test result information is also extracted to generate an IPC message for the result (554). If the response to the performance monitoring (555), the performance-related information is extracted to generate an IPC message for the result (556).

In the case of subscriber management 557, if it is a response 558 to the addition of a new subscriber, the subscriber related information is extracted and stored through the operation information management module 559, and an IPC message is generated 560 for the result. In response to the deletion of the existing subscriber (561), the subscriber-related information is extracted and deleted through the operation information management module (562), and generates an IPC message for the result (563).

In the case of the operation information management 564, if it is a response to the current operation information 565, the shape and fault related information is extracted and changed through the operation information management module (566), and an IPC message is generated for the result (567). ). If the operation information is periodically reported (568), the operation-related information (status information and failure information) is extracted (569) through the operation information management module, and generates an IPC message for the result (570).

The IPC message generated during the aforementioned function operation is transmitted 571 through the system GUI management block or the ATM-PON access network management agent block to be displayed on the operator screen (572).

When the present invention is applied to ATM-PON access network operation management, the network operation is performed using management information defined as a standard, so that the situation of communication devices constituting the network can be conveniently monitored and managed, and the actual network operation is performed. By consistently matching status with operational information managed by the operator, reliable management of ATM-PON access network operations and maintenance is possible.

Claims (3)

In the system that is mounted on the processor board inside the mother station device (OLT) to manage and maintain the ATM-PON access network, A system GUI management block that connects to an ATM-PON based access network operation management and maintenance block through an IPC message communication block and exchanges network operator commands in the form of IPC messages, interprets the message, and informs the network operator; An ATM-PON-based access network management agent block and an ATM-PON device supervisory control block which are connected to the ATM-PON-based access network operation management and maintenance block through an IPC message communication block and exchange network operation information, respectively; An operation and maintenance information management block for managing all operation management information of the network according to the requirements of the ATM-PON based access network operation management and maintenance block; An ATM-PON based access network operation management and maintenance block including a plurality of management modules configured to interpret the IPC message and perform a corresponding function independently, and to set an IPC message communication block and an appropriate connection protocol as necessary; And And an IPC message communication block for delivering network operation information between the blocks. In the method of operation management and maintenance of ATM-PON access network, Receiving a network operation command from the network operator and delivering it to the home station device to be managed; Blocking each network management function performed by the mother station apparatus and delivering the operation command to the corresponding management block for independent processing; A method of operating and maintaining an ATM-PON access network comprising receiving and storing a processed result and informing the network operator. The method of claim 2, The network operation command is operated and managed between the functional blocks in the form of IPC messages through a common message communication block that is responsible for exchanging information between the functional blocks set in the mother station apparatus. How to maintain.