KR20060084052A - Apparatus and method for managing the link and lsp performance and connectivity of mpls network - Google Patents

Abstract

The present invention relates to performance management of a link or LSP of a multi-protocol label switching (MPLS) network. A centralized control device performs performance management by collecting and analyzing performance values measured by each MPLS switch. The present invention relates to an apparatus and method for managing performance of an MPLS network, which reduces complexity of link or LSP performance measurement and improves management efficiency by applying measured performance results to management of an MPLS network.

Multi Protocol Label Switching (MPLS), Link Management, Label Switched Path (LSP) Management, Weights

Description

Apparatus and method for performance management of MPL network {APPARATUS AND METHOD FOR MANAGING THE LINK AND LSP PERFORMANCE AND CONNECTIVITY OF MPLS NETWORK}             

1 is a diagram according to the prior art, illustrating an MPLS network operated in a distributed control scheme.

2 is an MPLS network configuration to which the present invention can be applied.

3 is a block diagram of an apparatus for managing performance of an MPLS network according to the present invention;

4 is a diagram of link performance management in a centralized control MPLS network in accordance with the present invention;

5 is a diagram illustrating an algorithm according to a link weight adjusting procedure according to the link performance described above.

6 is a diagram illustrating link connection management performed in a centralized control MPLS network.

7 is a diagram illustrating a link weight adjustment algorithm according to the aforementioned link failure.

8 illustrates LSP performance management.

9 illustrates LSP connection management.

The present invention relates to an apparatus and method for managing performance of an MPLS network, and more particularly, to an apparatus and method for managing a link and an LSP of an MPLS network in which the complexity of a configuration and a protocol stack is reduced.

The present invention relates to an apparatus and method for managing a performance of a Multi Protocol Label Switching (MPLS) network, and more particularly, to an apparatus and a method for managing a performance of a label switching path (LSP) of an MPLS network.

In modern times, there are various multimedia services that require Quality of Service (QoS) guarantees such as Voice over IP (VoIP), video phone, video conference, IP TV, and Video on Demand (VoD). It is provided through the network. Techniques developed to perform services requiring these QoS guarantees include DiffServ, 802.1p, and MPLS.

Among them, MPLS is applied to an IP network or an Asynchronous Transfer Mode (ATM) network and the like to guarantee the QoS of the network. MPLS enables various QoS guarantees by transmitting traffic through a Label Switched Path (LSP) that provides various QoS services set up in a network. However, in order to efficiently operate the MPLS network, which is a QoS-guaranteed network, an MPLS network link and an LSP management technology are required.

1 is a diagram according to the prior art, illustrating an MPLS network operated in a distributed control scheme.

As shown in FIG. 1, a conventional MPLS network is provided through an IP routing protocol, ATM routing / signaling protocol, and MPLS signaling protocol exchange between MPLS switches such as MPLS Edge Switch (MES) and MPLS Core Switch (MCS). It is operated through distributed control method that sets up LSP. Link or LSP management of the MPLS network is also performed in a distributed control manner performed by the respective MPLS switches. In the MPLS network, link management may be performed by an IP routing protocol or an MPLS signaling protocol, and LSP management may be performed by an OAM such as an MPLS ping.

As such, the MPLS network using the distributed control method requires complex protocols for the configuration and management of the LSP, which makes the MPLS-based network very complicated. Accordingly, the structure of the MPLS switch used in the distributed control MPLS network is also complicated. In addition, the MPLS switch is a complex protocol stack, which places more load on the pre-control functions such as the LSP setting for the traffic transmission than the traffic transmission function.

In addition, in the MPLS network using the distributed control method, since each MPLS switch must collect and manage LSP information and link management information of the network, the network operation and management are difficult. Conventional MPLS networks do not have a network management scheme that reflects the performance management of the link, and when a link failure occurs, the LSP protection / switching of LSPs in a failed link is very complicated. In addition, the conventional MPLS network does not have an LSP performance management scheme and a corresponding LSP protection / switching scheme, and has a problem in that the LSP protection / switching process according to the LSP connection management is very complicated.

SUMMARY OF THE INVENTION An object of the present invention for solving such problems is to provide an apparatus and method for performance management of an MPLS network which simply performs operation and management of a network.

Another object of the present invention is to provide an apparatus and method for managing performance of an MPLS network, which enables optimal path establishment according to link status.

It is still another object of the present invention to provide an apparatus and method for managing performance of an MPLS network that can easily perform protection / switching on a failed LSP.

The present invention to achieve this object; An apparatus for managing a performance of an MPLS network including at least one Multi Protocol Label Switching (MPLS) network component, the apparatus comprising: receiving a performance measure for links on the network from the network element, and determining the performance measure When the analysis value satisfies a predetermined condition and the analysis value satisfies a predetermined condition, the network uses a link / LSP monitoring unit that adjusts a weight assigned to the corresponding link, and a weight adjusted according to a performance measurement result of the link. The performance management apparatus of the MPLS network is characterized in that it comprises a LSP calculation unit for performing a new LSP configuration or optimization of the existing LSP.

In addition, the present invention; In the performance management apparatus of the MPLS network including at least one MPLS network component, the network component receives the performance measurement for the links on the network, and analyzes the performance measurement according to a predetermined criterion If the analysis value satisfies a predetermined condition, performance management of the MPLS network is characterized by adjusting a weight assigned to the link and using the weight to set a new LSP for the network or optimize an existing LSP. Suggest a device.

In addition, the present invention; In the performance management method of the MPLS network in which traffic is transmitted through the set LSP, the first process of measuring the performance value of the link on the MPLS network and whether the measured link performance value satisfies a predetermined condition. A second process of determining, a third process of adjusting a weight assigned to the link according to whether the condition is satisfied, and a second process of setting a new LSP or optimizing an existing LSP in the network using the weight. We propose a performance management method for the MPLS network, which includes 4 steps.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

The present invention described below is characterized by applying a centralized control method to the MPLS network. With centralized control, MPLS networks facilitate network operation and management, including network topology and resource collection and management, LSP calculation and configuration, and link and LSP fault management.

In addition, the present invention measures the link performance of the network in order to perform the management of the MPLS network according to the link performance of the MPLS network, assigning a weight to each link according to the measurement result, and assigns the assigned weight to the LSP configuration, such as LSP generation or change By using it, it is possible to set up optimal route and manage network. The method of allocating weights according to the performance measurement result to each link can be applied not only to the centralized control MPLS network but also to the distributed control MPLS network.

First, a network to which the present invention can be applied will be described with reference to the accompanying drawings.

2 is a configuration diagram of an MPLS network to which the present invention can be applied.

As shown in FIG. 2, the MPLS network to which the present invention can be applied includes a performance management apparatus 200 for managing performance of an LSP of an MPLS network, mapping data such as IP packets input to the MPLS network, to an LSP, or an MCS. It is configured to include an MES (MPLS Edge Switch) for transmitting the MPLS packet transmitted from the (MPLS Core Switch) to a router or a switch, and the MCS for switching the MPLS packets.

The performance management apparatus 200 performs management of link or LSP performance and connectivity for the MPLS network, and performs protection / accumulation of a failed link or LSP.

The MES is located at the edge of the MPLS network and maps incoming data to the LSP, and the MCS is located inside the MES and switches the transmitted MPLS packets. The LSP can be established between one MES and another MES. The MES can measure the performance of the set LSP. The MES transmits the measured LSP performance value to the performance management apparatus 200 or analyzes the measured LSP performance value and transmits the analysis result value to the performance management apparatus 200. The performance management apparatus 200 receives and analyzes LSP performance measurement values from the MES and performs performance management on the MPLS network according to the analysis result, or receives an LSP performance analysis value from the MES and according to the received analysis value MPLS network Management of the MPLS network, such as link and LSP performance, connection management. In contrast, performance measurements for links in MPLS networks are performed in MCS as well as MES. In the following, two types of switches that do not need to distinguish between MES and MCS will be referred to collectively as MPLS switches.

3 is a block diagram of an apparatus for managing performance of an MPLS network according to the present invention.

As shown in FIG. 3, the performance management apparatus 200 according to the present invention may include a topology / resource collection unit 300, an LSP calculation unit 302, and an LSP activation. It may be configured to include an LSP Activation 304, a Link / LSP Monitoring 310, and an LSP Management 320. In addition, the performance management apparatus 200 may further include a policy management unit 340 as necessary. In addition, the performance management device 200 may further include a connection admission control unit (Connection Admission Control) 330, the connection acceptance unit 330 is not directly related to the invention of the first description thereof will be omitted.

Here, the topology / resource collector 300 collects topology information and resource information of the centrally controlled MPLS network according to the present invention. The LSP calculator 302 performs LSP calculation using the collected topology / resource information. The LSP activator 304 performs an LSP activation procedure for transmitting LSP information set in each MPLS switch.

The LSP monitoring unit 310 manages the performance and failure of the link and the established LSP of the MPLS network. The LSP manager 320 stores information about the calculated and set LSPs and manages the operation of the MPLS network.

The policy manager 340 receives the LSP setting and management policy of the MPLS network from the operator 360, and the policy is applied to an operation of the LSP calculator 302, the link / LSP monitor 310, or the LSP manager 320. To be reflected.

Part of these components, particularly related to the present invention, is link / LSP monitoring, which receives the LSP performance measured or analyzed by each MES 210-1 or 210-2 and performs the performance management algorithm of the LSP according to the present invention. The unit 310, the LSP calculation unit 302 and the LSP activation unit 304 to perform the LSP changeover or return when the performance of the LSP is severely degraded or improved again, the LSP management unit 320 to manage the state of the LSP, etc. . In addition, the policy manager 340 may be used for policy determination of LSP performance management.

Management of the centralized control MPLS network shown in FIG. 2 may be divided into link management and LSP management, which may be further divided into link performance management, link connection management, LSP performance management, and LSP connection management. First of all, link management will be described.

4 is a diagram according to the present invention, which illustrates link performance management in a centralized control MPLS network.

Link performance management is performed to adjust the weight (metric or metric) of the link according to the link performance between the MES and the MCS, and to use this weight when setting the LSP of the LSP calculator 302. For link performance management, a Synchronous Digital Hierarchy (SDH) OAM method or a Virtual Local Area Network (VLAN) OAM method may be used. The SDH OAM method is used when the link is SONET / Synchronous Optical Network (SDH), and the VLAN OAM method is used when the link is Ethernet (eg Gigabit Ethernet).

When the link is SDH, each MPLS switch analyzes the performance of the link based on the SDH frame and notifies the link / LSP monitoring unit 310 of the performance management apparatus 200 if a value out of the threshold exists. . Link performance, measured on the basis of SDH OAM, is defined as SONET MIB (Management Information Base), ES (Errored Second), SES (Severely Errored Second), SES (Severely Errored Framing Second), It may include items of.

When the link is Ethernet, each MPLS switch analyzes the performance of the link based on the VLAN OAM and notifies the link / LSP monitoring unit 310 of the performance management apparatus 200 if a value out of the threshold exists. Link performance measured based on VLAN OAM may include items such as delay, jitter, and loss.

In general, the analysis of the performance of the link may be performed by a method of comparing the measured performance value with a predetermined threshold, which is preferably selected according to the characteristics or needs of the system. If all the performance values are superior to the threshold, the link state value 310 is represented as better, and if any of the performance values is not as good as the threshold value, the link state value is represented as worse. Here, the description of setting the threshold for performance analysis will be omitted.

Thereafter, the link / LSP monitoring unit 310 performs a link performance management algorithm using this state value. The link / LSP monitoring unit 310 performs a topology / resource collection unit when the link state value is k times worse. The link weight value (weight, metric) maintained at 300 is increased, and if the k consecutive link states are better, the link weight value is decreased. Where k is a predetermined reference value selected as the preferred value for operation of the network. The link weight adjusted through the above-described process is transmitted to the LSP calculator 302 and used as an important variable in setting up a new LSP or optimizing an existing LSP.

In the above description, it is assumed that the MPLS switch performs a comparison between the measured performance value and the performance threshold, but the comparison between the measured performance value and the performance threshold is performed by the link / LSP monitoring unit 310 of the performance management apparatus 200. It may be. In the following, an embodiment in which the link / LSP monitoring unit 310 in the performance management apparatus 200 performs a threshold comparison and a performance comparison will be described once again. The MPLS switch measuring the link performance transmits the measured link performance value to the link / LSP monitoring unit 310 of the performance management apparatus 200. Measured performance values follow the SONET MIB or VLAN OAM spec. Receiving the measured link performance, the link / LSP monitoring unit 310 compares the received measured value with the performance threshold value stored. The link / LSP monitoring unit 310 sets the link state value to better if all the measured values are superior to the threshold as a result of the comparison, and sets the link state value to worse if any one of the measured values is not as good as the threshold.

In the following description, the link / LSP monitoring unit 310 describes a process of adjusting a weight of a link using a link state value according to a link performance comparison result.

If the k consecutive worsens, i.e., the k performance is poor for the k consecutive times, the link / LSP monitoring unit 310 increases the weight of the link maintained by the topology / resource collecting unit 300. .

If the k consecutive better times, that is, the link performance is good k times compared to the threshold, the link / LSP monitoring unit 310 reduces the weight of the link maintained by the topology / resource collector 300.

An embodiment showing the change of the weight adjusted as described above is shown in Table 1 below.

B W B W B W W W W B W B W B B B B W counter +1 -One +1 -One +1 -One -2 -3 -One +1 -One +1 -One +1 +2 +3 +1 -One Weight management maintain maintain maintain maintain maintain maintain maintain UP maintain maintain maintain maintain maintain maintain maintain down maintain maintain

On the other hand, the adjustment of the weight is to increase the link weight of the link when n or more link failures occur for a certain time, and to reduce the link weight of the link when i or more link failures occur for a predetermined time, otherwise the link It may be performed by various settings such as maintaining the weight as it is.

The adjusted link weight is transmitted to the LSP calculation unit 302 to be reflected as an important variable at the time of LSP establishment or path optimization. The aforementioned link performance management is continuously performed until the link is removed from the network.

5 is a diagram illustrating an algorithm according to a link weight adjusting procedure according to the aforementioned link performance.

5 illustrates an algorithm according to an embodiment in which an MPLS switch performs a performance comparison comparing a measured link performance value with a threshold. A separate description of the algorithm of FIG. 5 will be omitted.

6 is a diagram illustrating link connection management performed in a centralized control MPLS network.

Link connection management is to identify whether the link between MPLS switches is broken and to perform protection / transition when a failure occurs. SDH OAM or VLAN OAM may also be used for link connection management. Link connection management may be performed using a Hello protocol regardless of the type of link. When using the hello protocol, the MPLS switch determines that a failure has occurred in a connection link with the other MPLS switch when no data is received from the other MPLS switch for a predetermined time, and a Loss of Signal (LOS) indicating a link failure occurs. ) Is transmitted to the link / LSP monitoring unit 310 in the performance management apparatus 200.

The link / LSP monitoring unit 310 notified of the link failure by receiving the LOS transmits it to the topology / resource collecting unit 300 to update the topology map. In addition, the link / LSP monitoring unit 310 is notified of the link failure is transmitted to the LSP calculation unit 302 to perform the protection / switching process of the LSP existing on the failed link. In this case, the switching process means transmitting traffic transmitted through the original LSP through an alternative LSP that can be used instead of the original LSP. The LSP calculator performs LSP switching through the LSP that is set for the original LSP that has already been set up, and sets the new LSP for the original LSP for which the replacement LSP does not exist, and then sets the LSP using the set replacement LSP. You can perform the transfer.

The LSP calculation unit 302 notified of the link failure refers to the LSP list managed by the LSP management unit 320, checks the LSPs on the failed link, and then sets an alternative LSP for protection / switching to the LSP activation unit 304. And the LSP activator 304 sends an LSP protect / switch command to the MPLS switches to complete the protect / switch of the LSPs present on the failed link. After the link failure is recovered, the corresponding MPLS switches transmit a failover signal to the link / LSP monitoring unit 310 of the performance management apparatus 200, and the link / LSP monitoring unit 310 receiving the link / LSP monitoring unit collects the topology / resource. The topology map held by the unit 300 is updated. In addition, the link / LSP monitoring unit 310 transmits a failure recovery signal to the LSP calculator 302 to restore LSPs that have undergone protection or restoration to the original LSP. In this way, the method of returning to the original LSP upon failure recovery is called a revertive method. If necessary, protection / changeover can be carried out without performing a return process. After performing the above processes, the LSP management table in the LSP management unit 320 is updated according to the result of the execution.

On the other hand, if a link failure occurs, all LSPs passing through the link fail, and thus LSP failure detection signals are generated from LSP ingress / egress MESs. To prevent this, the link / LSP monitoring unit 310 receives the LSP failure detection signal transmitted from the MES and then determines whether the corresponding LSP exists in the failed link. If the LSP exists in the failed link, the link / LSP monitoring unit 310 discards the received LSP failure detection signal. However, if the LSP does not exist in the failed link, the LSP calculation unit 302 is notified so that the protection / transfer procedure may be performed.

Meanwhile, the link / LSP monitoring unit 310 that receives the link failure signal may perform link weight adjustment based on the link failure. Since a lot of link failures means that the link is in poor condition, the link weight is increased and used as an important variable in the LSP configuration.

Adjustment of the link weight may be performed as follows.

If a link failure occurs more than n times in a predetermined time, the link / LSP monitoring unit 310 increases the link weight managed by the topology / resource collecting unit 300.

● If a link failure occurs less than i times within a predetermined time, the link / LSP monitoring unit 310 decreases the link weight managed by the topology / resource collecting unit 300.

Otherwise, the link weight is kept as it is.

The above-described link connection management is continuously performed until the corresponding link is removed.

7 is a diagram illustrating a link weight adjustment algorithm according to the aforementioned link failure. The description of this algorithm is omitted.

8 is a diagram illustrating LSP performance management.

In the centralized control MPLS network, the performance management apparatus 200 sets up an LSP between MESs. After the LSP is set up, each MES performs an MPLS OAM function on the LSP. The MPLS OAM feature allows each MES to measure the performance of the LSP. After the performance measurement of the LSP, a comparison with a threshold is performed, which may be performed in the MES or may be performed in the performance management apparatus 200. When performing the comparison of the LSP performance and the threshold measured in the MES, each MES transmits the LSP performance comparison result to the link / LSP monitoring unit 310 of the performance management device 200. The link / LSP monitoring unit 310 that receives the performance comparison result performs the LSP performance management algorithm. If the performance of the LSP is severely degraded, the link / LSP monitoring unit 310 sends the LSP calculation unit 302 to the corresponding LSP. Sends an LSP switchover or recovery command. The LSP transfer or repair command is transmitted, the LSP calculation unit 302 transmits the LSP transfer command to the LSP activation unit 304 when a preset transfer path exists. However, if there is no preset transfer path, the LSP calculation unit 302 calculates the LSP recovery path and transmits the calculated recovery path to the LSP activation unit 304. The LSP activator 304 receiving the transfer or recovery path transmits an LSP transfer or recovery signal to each MES.

Meanwhile, when the performance of the LSP performance management algorithm improves the performance of the LSP again, the link / LSP monitoring unit 310 transmits an LSP return command to the LSP calculating unit 302 and the LSP calculating unit 302 receives the LSP activation unit. A route return signal is sent to each MPLS switch to modify the path to the original LSP via 304. The state of the LSP transferred or returned through the above process is transmitted to the LSP management unit 320 and managed.

9 shows LSP connection management.

LSP connection management analyzes the connection status of LSPs and performs protection or restoration in the event of a failure. In FIG. 8, MES 1 continuously transmits an MPLS OAM packet to MES 2 for connection management of LSP 1. MES 2 also continuously sends MPLS OAM packets to MES 1 for connection management of LSP 2. For example, when a failure occurs in the LSP 1, the MES 2 that detects a failure transmits the LSP failure detection signal to the link / LSP monitoring unit 310 of the performance management apparatus 200. In addition, MES 2 transmits a corresponding LSP failure detection signal to MES 1, an ingress node of the corresponding LSP. Upon receiving the LSP failure detection signal, the MES 1 checks whether a protection LSP previously set by the performance management apparatus 200 exists for the corresponding LSP. When the preset protection LSP exists, the MES 1 performs protection of the failed LSP and transmits the result of performing the protection of the LSP to the link / LSP monitoring unit 310 of the performance management apparatus 200. However, if the preset protection LSP does not exist, the MES 1 transmits the protection non-execution result to the link / LSP monitoring unit 310. The link / LSP monitoring unit 310 receiving the failure detection signal of the LSP 1 from the MES 2 waits for the result of performing the protection of the corresponding LSP from the MES 1. If the MES 1 receives the protection performance result of the LSP 1, the link / LSP monitoring unit 310 transmits the failure LSP and the protection performance result to the LSP calculation unit 302. Receiving this, the LSP calculator 302 updates the LSP management table in the LSP manager 320. However, if the MES 1 receives the result of not performing protection of LSP 1, the link / LSP monitoring unit 310 requests the LSP calculation unit 302 to set the restoration LSP for LSP 1, and the LSP calculation unit 302 restores the restoration LSP. Calculate and transmit it to the LSP activator 304, the LSP activator 304 transmits the LSP restoration command to the MPLS switches. When the failure of the corresponding LSP 1 is recovered, the MES 2 detects the failure recovery detection signal of the LSP 1 to the link / LSP monitoring unit 310 of the performance management apparatus 200, and receives the link / LSP monitoring unit 310. ) Informs the LSP calculation unit 302 of this and returns the LSP on which the protection or restoration is performed to the original path. If necessary, it may not be returned to the original path. Thereafter, the LSP management table in the LSP management unit 320 is updated.

On the other hand, the above-described performance management apparatus that assigns weights according to the performance of the link or LSP and uses the weights for the management of the LSP is considered to be introduced into the distributed control MPLS network, not the central control MPLS network. Could be. This can be done by each MPLS switch assigning weights according to the link's performance results. The weight for the LSP will be managed by the MES in the MPLS switch. Of course, such a distributed control method has many disadvantages compared to the centralized control method, it is preferable to introduce a centralized control method if possible. However, the performance management apparatus using the weight according to the performance of the link or the LSP of the present invention may be applied to the MPLS network in a distributed control scheme to improve its management efficiency.

The present invention simplifies the operation and management of the network through the link management of the MPLS network of the centralized control method or the performance management device of the LSP. In addition, the present invention adjusts the weight of the link based on the link performance and enables the optimal LSP setting and management according to the link state by using the weight. In addition, the present invention provides a systematic and efficient LSP protection / switching method according to the LSP connection management. Through this, the present invention can be effectively used for the connection management and performance management of the link and LSP in the MPLS network, which requires the guarantee of QoS, and provides the user with a high quality multimedia service through the centralized control method of the MPLS network. QoS can be guaranteed and provided.

Claims (27)

In the performance management device of the MPLS network comprising at least one Multi Protocol Label Switching (MPLS) network component, Receive a performance measure for the links on the network from the network component, analyze the performance measure according to a predetermined criterion, and if the analysis value satisfies a predetermined condition, weights assigned to the link Link / LSP monitoring unit, And a LSP calculator configured to set a new LSP for the network or optimize an existing LSP using a weight adjusted according to a result of the performance measurement of the link. The method of claim 1, And the MPLS network component measures performance of the link using SDH operation, administration and maintenance (OAM) if the link is a synchronous digital hierarchy (SDH) link. The method of claim 2, The performance measurement device of the SDH link is a performance management device for an MPLS network comprising at least one or more of an Error Second (ES), SES (Severely Errored Second), SEFS (Severely Errored Framing Second), and CV (Coding Violation) items. . The method of claim 1, And the MPLS network component measures a performance of the link using a virtual local area network (VLAN) OAM when the link is Ethernet. The method of claim 4, wherein The performance measurement of the Ethernet link is a performance management device of the MPLS network for at least one of the items of the transmission delay (delay), jitter, transmission loss (loss). The method of claim 1, And a topology / resource collector for managing the link weight and managing a topology map for storing the overall topology / resource state of the network. The method of claim 6, And the LSP calculation unit performs new LSP setting or optimization of an existing LSP in the network using the weight and the topology map managed by the topology / resource collector. The method of claim 7, wherein And the topology map is updated according to the LSP status changed by the LSP calculator. The method of claim 1, And the link / LSP monitoring unit increases the weight when the performance analysis value for the link is continuously lower than the required performance over a predetermined number of times. The method of claim 1, And the link / LSP monitoring unit decreases the weight when the performance analysis value for the link is continuously higher than the required performance over a predetermined number of times. The method of claim 1, The link / LSP monitoring unit determines the LSP switching using the replacement LSP instead of the original LSP for the LSPs included in the link when the performance analysis value for the link is continuously lower than the required performance more than a predetermined number of times. MPLS network performance management device. The method of claim 11, And an LSP manager configured to store information for identifying LSPs included in the link. The method of claim 11, When the LSP calculation unit receives the LSP transfer request from the link / LSP monitoring unit, the LSP calculation unit checks whether there is an LSP to replace the original LSP. If does not exist, the performance management device of the MPLS network to set the replacement LSP that can replace the original LSP and to switch to the set replacement LSP. The method of claim 11, And the link / LSP monitoring unit determines to recover the original LSP instead of the replacement LSP when the original LSP satisfies a predetermined condition. The method of claim 14, And the link / LSP monitoring unit determines the restoration to the original LSP when the performance analysis value for the original LSP is higher than the required performance more than a predetermined number of times. The method of claim 1, The link / LSP monitoring unit receives a performance measurement value for a label switched path (LSP) configured for traffic transmission on the network from a network component located at a boundary of the MPLS network components, and measures the performance. And analyzing the value according to a predetermined criterion and adjusting the weight assigned to the link if the analysis value satisfies a predetermined condition. The method of claim 1, The link / LSP monitoring unit determines whether the LSP exists on a link determined to have failed because the LSP does not satisfy a predetermined condition, and if the LSP exists on a link determined to have failed, the link / LSP monitoring unit And a performance management device for an MPLS network that maintains the results performed by the management of the link. In the performance management device of the MPLS network comprising at least one MPLS network component, the management of the link or LSP through a centralized control method, Receive a performance measure for the links on the network from the network component, analyze the performance measure according to a predetermined criterion, and if the analysis value satisfies a predetermined condition, weights assigned to the link Link / LSP monitoring unit, And a LSP calculator configured to set a new LSP for the network or optimize an existing LSP using a weight adjusted according to a result of the performance measurement of the link. In an MPLS network comprising at least one MPLS network component, An MPLS network component for measuring a performance value of a link on the network; Receive the performance value from the MPLS network component, compare the received performance value with a predetermined threshold, calculate an analysis value, and adjust the weight assigned to the link if the calculated value satisfies a predetermined condition. An MPLS network comprising a performance management device. In an MPLS network comprising at least one MPLS network component, An MPLS network component that measures a performance value of a link on the network, compares the measured performance value with a predetermined threshold, and calculates an analysis value thereof; And a performance management device that receives the analysis value from the MPLS network component and adjusts a weight assigned to the link when the analysis value satisfies a predetermined condition. In the performance management device of the MPLS network comprising at least one MPLS network component, The network component receives the performance measurement for the links on the network, analyzes the performance measurement according to a predetermined criterion, and if the analysis value satisfies a predetermined condition, weights assigned to the link. And adjusting and using the weights to set a new LSP or optimize an existing LSP for the network. In the performance management method of the MPLS network in which traffic is transmitted through the configured LSP, A first step of measuring a performance value of a link on the MPLS network; A second process of determining whether the measured performance value of the link satisfies a predetermined condition; A third process of adjusting a weight assigned to the link according to whether the condition is satisfied; And a fourth process of performing new LSP establishment or optimization of an existing LSP in the network using the weight. The method of claim 22, And increasing the weight when the performance value of the link is continuously lower than the required performance more than a predetermined number of times. The method of claim 22, And reducing the weight when the performance value of the link is continuously higher than the required performance more than a predetermined number of times. The method of claim 22, And performing a switchover for LSPs existing in the link if the measured link performance value satisfies a predetermined condition. The method of claim 25, And performing a switching to LSPs existing in the link when the performance value of the link is continuously lower than the required performance more than a predetermined number of times. The method of claim 26, And recovering the LSP when the performance value of the original LSP that is transferred is higher than the required performance more than a predetermined number of times in succession.

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