KR20050059872A - Fault manage methode for service level agreement in xdsl - Google Patents

Abstract

The present invention provides the quality of service in the digital subscriber line network to provide a quality decision system by providing fault judgment criteria for failures occurring in the digital subscriber line (xDSL) network and providing clear criteria for failure time and recovery time. It relates to a failure management method for guarantee.

According to the present invention, in the failure management method of a digital subscriber line network, when a failure occurrence report is received from a subscriber, a subscriber section between the subscriber side receiving the failure and the digital subscriber line connection point and a network management managed by the network management system By checking whether a failure occurs for each section, detecting the location of the failure, and recording and collecting the failure occurrence time and recovery time, an objective criterion for determining a fault based on a service level agreement (SLA) is prepared.

Description

Fault management method for quality of service guarantee in digital subscriber line network

The present invention relates to a failure management method for guaranteeing a certain level of service quality in a digital subscriber line (xDSL) service network.

Digital subscriber line (xDSL) is one of the transmission methods for widening the subscriber network that additionally secures high-speed data lines by using existing copper subscriber line, and installs an optical cable from a telephone company to a demand-intensive area. To subscriber terminals using existing copper telephone lines (FTTC: fiber to the curb) to provide a variety of multimedia services such as high speed internet, video on demand (VOD), and cable broadcasting (CATV) as well as existing telephone services. As such, there are asymmetric digital subscriber line (ADSL), symmetric digital subscriber line (SDSL), high speed digital subscriber line (HDSL), ultra high speed digital subscriber line (VDSL) and the like.

In this xDSL service network, in order to guarantee a certain level of network quality of service, failure information collected from a network management system (hereinafter referred to as NMS) and relationship information with related subscribers must be established, and subscribers experience Various information gathering and diagnostic functions that affect network quality of service are required.

However, in the past, no network failure information collection or diagnostic technology near the subscriber experience level is provided, and the failure information collected by the NMS is also composed of dependent information between devices configuring the network and devices providing Internet access service. Because of this, it is very different from the actual subscriber experience level.

Therefore, it is difficult to diagnose objective and realistic faults and collect information on the xDSL service network. Therefore, it is difficult to apply an objective quality assurance system.

For example, applying the quality assurance quality assurance system based on the fault information collected from the NMS simply means that there is a difference between the collected information of the NMS and the actual level of subscriber's feelings, so that the subscriber and the operator are responsible for the cause of the fault. Friction may occur as a result of the determination of whether or not the failure and the determination of the recovery time are different.

SUMMARY OF THE INVENTION The present invention has been proposed to solve the above-mentioned conventional problems, and an object thereof is to provide a definite criterion for the fault determination and the occurrence time and the recovery time of the fault caused by the digital subscriber line communication service. It is to provide a fault management method for guaranteeing the quality of service in digital subscriber line network that can be applied to the guarantee system.

As a construction means for achieving the object of the present invention described above, the present invention includes a network management section consisting of a plurality of routers connected to a predetermined server or multiplexer, and a connection line connecting the subscriber terminal to the multiplexer A failure management method for quality of service guarantee in a digital subscriber line network comprising a subscriber section, comprising: receiving a failure occurrence report from a subscriber; Diagnosing a network management section connected to the subscriber side receiving the failure, and determining whether a failure occurs in the corresponding section; Determining whether a failure occurs by performing a diagnosis on a subscriber section connecting the network management section to a subscriber side receiving the failure when the diagnosis of the network management section passes; Determining and recording an occurrence time of a corresponding failure when determining that the received failure occurs in a network management section or a subscriber section; Performing recovery for the received failure; And determining and recording a failure recovery time after completion of the recovery.

In addition, in the failure management method for guaranteeing the quality of service in a digital subscriber line network according to the present invention, the network management section is a network backbone section from a connection point of a subscriber's Internet access line, and the subscriber section is used for Internet access. It is characterized by the connection line section.

In addition, in the failure management method for quality of service guarantee in the digital subscriber line network according to the present invention, when it is determined that the failure in the network management interval, failure occurrence time through the inquiry of the history history information of the network management system (NMS) , The cause of the failure, and the information is provided according to the failure recovery.

In addition, in the failure management method for guaranteeing the quality of service in a digital subscriber line network according to the present invention, when the received failure is determined to be a failure in the subscriber section, the failure occurrence time of the subscriber is determined as the failure time. Characterized in that.

In addition, in the failure management method for guaranteeing the quality of service in the digital subscriber line network according to the present invention, the diagnosis of the network management interval includes the self-diagnosis of the multiplexer, the self-diagnosis of the boundary router, and the predetermined measurement of the network backbone in the multiplexer. Test diagnostics up to the point of interest.

In addition, the failure management method for guaranteeing the quality of service in the digital subscriber line network according to the present invention further includes the step of determining whether the user's failure reception report is due to an error, and if the error is terminated immediately. It features.

In addition, the failure management method for guaranteeing the quality of service in the digital subscriber line network according to the present invention visits the subscriber and performs on-site diagnosis when no failure occurs in any of the network management section and the subscriber section diagnosis. It is characterized by that.

In addition, the failure management method for quality of service guarantee in the digital subscriber line network according to the present invention comprises the steps of determining the fault cause for the failure recovered by performing the failure recovery step; And if it is determined that the user is at fault, terminates as it is, and if it is determined that the operator is at fault, calculating the duration of failure from the occurrence of failure and recovery time, and calculating a compensation according to the service level agreement (SLA). It characterized in that it further comprises.

Hereinafter, the detailed description of the present invention will be described with reference to the accompanying drawings.

1 is a block diagram of a digital subscriber line service network to which the present invention is applied. Referring to FIG. 1, the subscriber station 101 is provided with a subscriber modem 102, and the subscriber modem 102 is connected to a digital subscriber line of a relay station through an access line 103 implemented by a general telephone line or the like. It is connected to a Digital Subscriber Line Access Multiplexer (hereinafter referred to as DSLAM) 104, and the DSLAM 104 is connected to a router 105 constituting the Internet 107 and, if necessary, secured for security. Firewall 106 may be provided at the point of. Likewise, the Internet 107 is connected to the servers 106 that provide predetermined information or services through the router 105.

As described above, the Internet access in the xDSL service network may be somewhat different depending on the subscriber's environment.

In such an xDSL service network, a failure that degrades the quality of service for the subscriber's Internet access may occur at various locations. In particular, since the quality of network service experienced by subscribers can be affected by various factors, it is necessary to establish a method for determining the cause of the quality deterioration and the provision of a range of compensation.

For example, in the event of a failure, the fault range of the service provider is DSLAM 104, the router 105, the firewall 106, the Internet 107, which is a network configuration range provided by the service provider from the access line 103. It may be limited to. Therefore, when a failure is received from the subscriber, it should be determined whether the location of the failure falls within the scope of the operator's responsibility, and a criterion for determining the occurrence time and recovery time of the failure should be prepared. The reason for the fault and the occurrence and recovery time of the fault cause the quality assurance system to be used as a factor for estimating the amount of compensation for the subscriber when the quality level is insufficient.

2 is a flowchart illustrating a network management method in an xDSL service network according to the present invention, and the network management method of the present invention shown in FIG. 2 will be described with reference to the service network having the above structure.

The failure management according to the present invention begins with the subscriber noticing that the xDSL quality of service has not reached the agreement level (s201), and receiving the occurrence of the failure at the service provider side (s202).

In this case, since the xDSL service is continuously activated during the time that the subscriber uses the Internet service through the xDSL, the deactivation time without using the service should be excluded from the quality assurance.

When the occurrence of a failure is received from the subscriber as described above, it is determined whether the received failure is a disability already received or a disability currently being processed or a newly-disabled disability (s203).

In the determination, if the failure is a newly generated failure, the failure processing flow described below is performed, and in the case of a disabled person who is already received or being processed, the processing history is notified to the subscriber and ends (s214).

Here, when a new failure occurs, a simple diagnosis function may be performed at the time of failure, which is a means for preventing the reception of a failure due to a simple operation error of the subscriber.

Subsequently, in the case of a newly-disabled person, the fault processing flow is performed to identify the cause of the fault and collect the time of occurrence of the fault. The fault cause diagnosis is divided into a network management section (s204) and a subscriber section diagnosis (s207).

First, a diagnosis is made about a network management interval from a connection point of a subscriber's Internet access line to a network backbone (s204). For example, the self-diagnosis of the DSLAM 104, the self-diagnosis of the boundary router 105, and the test diagnosis from the DSLAM 104 to a predetermined measurement point of the network backbone are shown.

Since the occurrence of the failure in the network management interval affects not only the subscriber who has reported the failure, but also all the subscribers who use similar Internet access services, it is preferable to perform the failure before the subscriber interval diagnosis.

When the network management section diagnosis is completed, the diagnosis result is collected and it is determined whether a failure occurs in the management section (S205). In the above, if there is a failure in the network management interval as a result of the determination, the responsibility for the subscriber reception failure is passed to the service provider.

Then, the corresponding failure history is inquired from the NMS (s206). In general, since the network devices, that is, the DSLAM 104, the router 105, the firewall 106, the Internet 107, and the like are managed through a network management system (NMS), fault information and recovery information generated by a device unit Can be obtained by querying fault history information of the network management system.

Based on the information obtained through the fault history inquiry of the network management system, the failure occurrence time is determined (s209), and the failure recovery time after the failure recovery (s212) is determined (s213).

On the contrary, when there is no abnormality in the diagnosis determination result (s205) and the network management section, the diagnosis is performed on the subscriber section corresponding to the line connection point from the subscriber station (s207).

In this case, since the subscriber section is an access line section used for accessing the Internet, the subscriber section diagnosis is performed through a circuit management system rather than a network management system (NMS).

Reviewing the results of the subscriber diagnosis performed as described above, it is determined whether there is an abnormality in the subscriber section (s208), and if the abnormality is found in the subscriber section as a result of the determination, the failure occurrence time of the subscriber is determined as the failure occurrence time ( s209), failure recovery is performed (s212). The time point at which the disaster recovery is completed is determined and recorded (S213).

If the cause of failure is not detected in both the subscriber section and the management section, field verification is required (s210). The on-site verification is performed by a technician visiting the subscriber offline to diagnose the failure.

According to the field verification result, it is determined whether the cause of the failure is the operator side or the subscriber side (s211).

As a result of the verification, if it is determined that the service provider is at fault, the failure reception time of the subscriber is determined as the failure occurrence time (s209). The failure recovery proceeds (s212). Similarly, the time point at which the failover is completed is determined and recorded (S213).

On the contrary, when it is determined that the responsibility of the subscriber is determined as the result of the field verification, it is not necessary to prepare a compensation criterion, and thus the process is terminated as it is after the failure recovery (s212).

The failure recovery process proceeds according to the cause of the failure identified through the management interval diagnosis (s204), the subscriber interval diagnosis (s207), or the on-site diagnosis (s210), and after the failure recovery process, determination of the failure recovery time is performed ( s213).

For example, failures generated in the devices constituting the network can be repaired on their own, so only the recovery time can be determined by referring to the information of the network management system (NMS) without additional recovery processing. By the failure identified by the subscriber, the confirmation time of whether the normal recovery can be determined as the failure recovery time.

Next, FIG. 3 is a flowchart illustrating a compensation processing procedure according to an SLA in the failure management method according to the present invention.

The Quality Assurance Scheme (SLA) for network services must include compensation for SLA violations, using the disability information obtained according to the procedure of FIG. 2 above. In this case, the compensation amount is calculated according to the cause of the failure, the occurrence time, recovery time, etc., and the compensation amount for the cumulative and redundant failures is calculated according to the contract between the subscriber and the operator.

The network management method according to the present invention calculates the compensation amount according to the failure information collected by the procedure of FIG. 2 and the predetermined SLA criteria, which starts from the reception of the failure of the subscriber (302).

Then, by the procedure described in FIG. 2, it is determined whether the reception of the subscriber is a report due to a real disability or an error (s303).

In the case of receiving the actual failure, after determining the cause of the failure according to the procedure shown in FIG. 2 (s304), first, the failure recovery is performed so as to minimize the inconvenience of the subscriber (s305).

When failure recovery is performed as described above, according to the failure occurrence section identified by the procedure of FIG. 2, it is determined whether the failure is caused by the operator side or the subscriber side (s306).

The determination can be made by diagnosing the location of the failure, the cause of the failure, and the like.

As a result of the determination, since a separate compensation process is not necessary for the failure determined as the reason for the subscriber's fault, it is terminated as it is (s311). On the contrary, when it is determined that the cause of the business is at fault, the failure time is determined using the information obtained from the failure cause diagnosis and the failure recovery process of FIG. 2 (s307), and based on the determined failure time Compensation amount is calculated according to the SLA between the operator and the subscriber, the compensation of the calculated amount is provided to the subscriber (s309, s310). Here, the compensation process should be processed without a separate compensation request from the subscriber.

The network management method of the present invention performed as described above, in the xDSL service network, by determining the fault of the operator and subscriber to the network failure, and by presenting an objective determination method for the failure occurrence time and recovery time, a certain level in the xDSL service network It can be applied to the quality assurance system to guarantee the quality of

In particular, in the information collected by the network management method according to the present invention, failure cause information determined at the carrier's fault can be referred to the network management function, and failure cause information determined at the subscriber's fault is determined by the subscriber's side. It can be used for maintenance services, failure occurrence time information can be used for centralized management of the managed network, failure recovery time information can be used to calculate the processing time for the unit failure.

As described above, the present invention can determine whether the carrier attributable to the cause of the failure occurred in the xDSL service network provided by the operator, and by providing accurate determination of the failure occurrence time and recovery completion time, the dispute with the subscriber It is possible to make an objective judgment on the main judgment factors that may occur, and to have an excellent effect of enabling the quality assurance system to be applied to the xDSL service network.

1 is an overall configuration diagram of a digital subscriber line network to which the present invention is applied.

2 is a flowchart illustrating a failure management method for guaranteeing quality of service in a digital subscriber line network according to the present invention.

3 is a flowchart illustrating a compensation processing procedure in the failure management method according to the present invention.

Claims (6)

Receiving a failure report from the subscriber; Diagnosing an abnormality in the management section from the line connection point of the subscriber receiving the failure to the network backbone network, and determining whether the handicapped has occurred in the section; If there is no abnormality in the network management section, diagnosing an abnormality of the subscriber section between the subscriber side and the line connection point which received the failure, and determining whether the disabled occurred in the subscriber section; Determining and recording an occurrence time of a corresponding failure when determining that the received failure occurs in a network management section or a subscriber section; Performing recovery for the received failure; And And determining and recording a failure recovery time after the recovery is completed. The method of claim 1 wherein the method is In the digital subscriber line network, when it is determined that the failure occurred in the network management section, the failure occurrence time, the cause of the failure, and the recovery time of the failure are collected and determined through inquiry of failure history information of the network management system (NMS). How to manage faults to ensure quality of service. The method of claim 1 wherein the method is If the received failure is determined to be a failure in the subscriber section, the failure management report reception time of the subscriber to determine the failure time, characterized in that the failure management method for the quality of service in the digital subscriber line network. The method of claim 1, wherein the diagnosis of the network management interval Self-diagnosis of the multiplexer, self-diagnosis of the edge router, and test diagnosis from the multiplexer to a predetermined measurement point of the network backbone. The method of claim 1 wherein the method is And determining whether the user's failure reception report is due to an error, and if the error is reported, immediately ending the error. The method of claim 1 wherein the method is Determining a fault cause for the fault recovered by performing the fault recovery step; And As a result of the determination, if it is determined to be the user's fault, it is terminated as it is, and if it is determined to be the carrier's fault, the failure duration time is calculated from the time of failure and recovery time, and based on the service level agreement (SLA) between the subscriber and the service provider. And calculating a compensation, the fault management method for quality of service guarantee in a digital subscriber line network.