JPH1051446A - Monitor system for performance of sdh transmission network - Google Patents

Abstract

PROBLEM TO BE SOLVED: To relieve the load attended with performance monitor processing by a section terminator of a synchronous digital hierarchy(SDH) transmission network, a bus terminator, a management network and a network monitor. SOLUTION: Assignment state flags 11, 12 set/released by a network monitor equipment 24 are provided to performance monitor sections 26, 28 provided to termination sections 25, 27. When the assignment state flags denote assignment release, the termination section stops an output of a performance monitor notice. A current data processing section 29 stops count of performance data, comparison with a threshold level, and transfer of count to a history data storage section 30 when no performance monitor notice is received within a prescribed time. The history data storage section 30 stops generation of history data when no count is transferred even after lapse of an observation period.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a performance monitoring method for an SDH (Synchronous Digital Hierarchy) transmission network, and more particularly to a performance monitoring method for an SDH transmission network in which the load involved in performance monitoring is reduced.

[0002]

2. Description of the Related Art This type of performance monitoring system is described in ITU-T Recommendation G. In an SDH transmission network including an SDH path terminating device and an SDH section terminating device for providing management information specified in 774, and a network monitoring control device for performing network management based on the management information, a path terminating unit or section CV (Code Violation), ES (Error
Seconds), SES (Severely Error Seconds), and U
It is used to monitor performance information such as AS (Unavailable Seconds).

As shown in FIG. 2, a conventional SDH transmission network performance monitoring method includes an SDH path terminator 22 connected to a plurality of transmission lines (sections) 21, an SDH section terminator (not shown), These SDH path terminating devices 2
2 and a network monitoring device 24 connected to the SDH section terminating device via a management network 23.

[0004] The SDH path terminating device 22 includes a section terminating unit 25 for terminating a main signal section transmitted through a plurality of transmission paths 21 and a performance monitoring unit 26 for detecting performance data included in section overhead.
A path termination unit 27 that terminates the path separated by the section termination unit 25, a performance monitoring unit 28 that detects performance data included in the path overhead, and a detection from the performance monitoring units 26 and 28 at a predetermined observation cycle. Each data is counted, the count value is compared with a corresponding threshold value, and a current data processing unit 29 that issues an alarm notification when the count value exceeds the threshold value, and the current data processing unit 29 counts at a predetermined observation cycle. A history data storage unit 30 that stores the count value as a history; a scan unit 31 that reads the count value held or stored in the current data processing unit 29 and the history data storage unit 30 in response to a request from the network monitoring device 24. , And an agent 32 for connecting the SDH path terminating device 22 to the network monitoring device 24.

[0005] The SDH section terminating unit 25 is the same as the SDH path terminating device 22 except that it does not have the path terminating unit 27. Therefore, illustration and description thereof are omitted.

Next, the operation of the conventional performance monitoring method of the SDH transmission network will be described. The section termination section 25 terminates the main signal section. Further, the path termination unit 27
Terminate the path. At this time, the performance monitoring unit 26 of the section termination unit 25 detects the performance data from the section overhead of the frame, and the performance monitoring unit 2 of the path termination unit 27.
8 detects performance data from the path overhead. Detection of performance data by the performance monitoring units 26 and 28 is as follows.
This is performed in units of a predetermined time (for example, one second), and the values of the performance data detected in the unit time are transferred to the current data processing unit 29 as performance monitoring notifications.

The current data processing unit 29 has a plurality of performance data counters corresponding to the number of performance data detected by the performance monitoring units 26 and 28. Each counter is
The values of the performance data from the corresponding performance monitoring units 26 and 28 are counted (accumulated), and the count values are held. Further, the current data processing unit 29 holds a performance data threshold value corresponding to each performance data, and compares this threshold value with the count value of the performance data. As a result of the comparison, when the count value exceeds the threshold value, the current data processing unit 29 notifies the network management device 24 of the service quality alert via the agent 32 and the management network 23. further,
The current data processing unit 29 transfers the count value of the counter to the history data storage unit 30 at a predetermined observation cycle (for example, 15 minutes to one day), stores the count value, and clears the counter.

When it is desired to read out the count value held in the current data processing unit 29 and the past count value stored in the history data storage unit 30 from the network monitoring unit 24, the scanning unit 31 is started. The scanning unit 31 reads a count value from the current data processing unit 29 or the history data storage unit 30 in response to a request from the network monitoring device 24, and transfers the read count value to the network monitoring device 24.

[0009]

In the conventional performance monitoring system, the current data processing is performed by the performance monitoring unit at all section termination units and path termination units regardless of whether a service is provided to the user or not. SDH that terminates a large number of transmission lines that do not provide services to the user because performance monitoring processing such as performance monitoring notification to the unit, counting in the current data processing unit, comparison with a threshold value, and creation of history data is performed. Section terminator,
The SDH path terminating device has a problem that unnecessary load due to the performance monitoring process is large.

In addition, a failure due to construction or the like is likely to occur in a transmission line that does not provide a service to the user, and a service quality alarm notification is sent from a section terminating device and a path terminating device connected to such a transmission line. Since the data is frequently output, there is also a problem that the load on the management network and the network monitoring device increases.

An object of the present invention is to reduce the load associated with performance monitoring processing of a section terminating device, a path terminating device, a management network, and a network monitoring device.

[0012]

According to the present invention, a terminating means for terminating a transmission path, and a performance monitoring means for detecting performance data from a data frame received via the transmission path and outputting it as a performance monitoring notice Counting means for receiving the performance monitoring notification, counting the value of the performance data and holding a count value, comparing the count value with a threshold value,
In a performance monitoring method for an SDH transmission network having an alarm notifying means for giving an alarm notification when the count value exceeds the threshold value, and a network managing means for receiving the alarm notification, an assignment state flag is provided in the performance monitoring means. Setting / releasing means for setting / releasing the allocation status flag in the network management means, wherein the output operation of the performance monitoring notification is stopped when the allocation status flag indicates release. The characteristic performance monitoring method of the SDH transmission network is obtained.

Further, according to the present invention, there is provided a section termination section for terminating an SDH section, a performance monitoring section provided at the section termination section, for detecting performance data from section overhead and outputting it as a performance monitoring notification, A counting means for counting the value of the performance data in response to the performance monitoring notification and holding the count value; comparing the count value with a threshold value; and notifying the network monitoring device when the count value exceeds the threshold value. In the SDH section terminating device having a current data processing unit provided with an alarm notifying means for performing the above, an assignment status flag which can be set / released from the network monitoring device is provided in the performance monitoring unit, and the allocation status flag indicates release. The output of the performance monitoring notification by the performance monitoring unit is stopped. Section termination device is obtained.

Further, according to the present invention, a section termination section for terminating an SDH section, a path termination section for terminating an SDH path, and a section overhead and a path overhead provided at the section termination section and the path termination section, respectively. A performance monitoring unit that detects performance data and outputs the performance data as a performance monitoring notification, a counting unit that receives the performance monitoring notification, counts the value of the performance data and holds a count value, and compares the count value with a threshold value And a current data processing unit having an alarm notifying unit for notifying an alarm to the network monitoring device when the count value exceeds the threshold value. Set from monitoring device /
A releasable allocation status flag is provided, and when the allocation status flag indicates release, an output operation of the performance monitoring notification of the performance monitoring unit is stopped. can get.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a performance monitoring method for an SDH transmission network having one embodiment of the present invention. Here, the same components as those in the related art are denoted by the same reference numerals, and description thereof is omitted.

In the performance monitoring system shown in FIG. 1, allocation status flags 11 and 12 are provided in the performance monitoring units 26 and 28 of the section termination unit 25 and the path termination unit 27, respectively. The setting / release of these allocation status flags 11 and 12 is as follows.
The setting is performed via a management network 23 and an agent 32 from a setting unit (not shown) provided in the network monitoring device 24. The allocation status flags 11 and 12 are assigned when a service is provided to a section or path user, and are released when no service is provided.

When the allocation status flags 11 and 12 indicate the allocation setting, the performance monitoring units 26 and 28 detect performance data from section overhead or path overhead, respectively, as in the conventional case. When the allocation status flag indicates that the allocation has been released, the performance monitoring unit stops detecting the performance data and stops the performance monitoring notification for each unit time.

If there is no performance monitoring notification per unit time from the performance monitoring unit, the current data processing unit determines that it is not necessary to monitor the section or path (it is not a monitoring target), and counts the performance data value. , The comparison between the count value and the threshold value, and the transfer of the count value to the history data storage unit are not performed. If no count value is transferred from the current data processing unit in the history data storage unit, the history data is not created.

As described above, in the performance monitoring method of the SDH transmission network shown in FIG. 1, the section and the path not providing the user are not monitored.
The load of performance monitoring processing of the SDH section terminating device and the SDH path terminating device can be reduced.

In addition, since sections and paths that do not provide services to the user are not monitored, it is possible to eliminate a service quality alert notification from these sections and paths to the network monitoring apparatus. The load on the network and the network management device can be reduced.

[0021]

According to the present invention, the performance monitoring means of the termination device of the SDH transmission network is provided with an allocation status flag which can be set / released from the network monitoring device, and outputs the performance monitoring notification from the performance monitoring means. By stopping, the load of the performance monitoring process of the SDH transmission network can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an embodiment of the present invention.

FIG. 2 is a block diagram of a conventional performance monitoring method for an SDH transmission network.

[Explanation of symbols]

 11, 12 Allocation status flag 21 Transmission line 22 SDH path terminator 23 Management network 24 Network monitor 25 Section terminator 26 Performance monitor 27 Path terminator 28 Performance monitor 29 Current data processing unit 30 History data storage unit 31 Scan unit 32 agents

Claims (8)

[Claims] 1. A terminating means for terminating a transmission path, a performance monitoring means for detecting performance data from a data frame received via the transmission path and outputting it as a performance monitoring notice, Counting means for counting the value of the performance data and holding the count value; comparing the count value with a threshold value; and providing an alarm notification means for performing an alarm notification when the count value exceeds the threshold value; and receiving the alarm notification. In the performance monitoring method for an SDH transmission network having network management means, the performance monitoring means is provided with an allocation status flag, and the network management means is provided with setting / release means for setting / releasing the allocation status flag. A performance monitoring method for an SDH transmission network, wherein the output operation of the performance monitoring notification is stopped when the status flag indicates release. 2. A transfer means for transferring the count value held by the count means at a predetermined cycle and clearing the count means, and history data for sequentially storing the counter values transferred by the transfer means. 2. The performance monitoring method for an SDH transmission network according to claim 1, further comprising a storage unit. 3. The output of the performance monitoring notification from the performance monitoring means is performed every elapse of a predetermined unit time, and the performance monitoring notification is not output even after the elapse of the unit time. 3. The performance monitoring method for an SDH transmission network according to claim 2, wherein the operation of said transfer means is stopped. 4. The history data storage unit according to claim 2, wherein the operation of the history data storage unit is stopped when the count value is not transferred from the transfer unit in the predetermined cycle. SDH transmission network performance monitoring method. 5. The apparatus according to claim 1, wherein said termination means is a section termination section for terminating an SDH section, and said performance monitoring means detects said performance data from a section overhead of said data frame. ,
Or 4, a performance monitoring method for the SDH transmission network. 6. The SDH transmission network according to claim 1, wherein said terminating unit is a path terminating unit for terminating an SDH path, and said performance monitoring unit detects said performance data from a path overhead of said data frame. Performance monitoring method. 7. A section termination unit for terminating an SDH section, a performance monitoring unit provided in the section termination unit, for detecting performance data from section overhead and outputting the data as a performance monitoring notification, and receiving the performance monitoring notification. Counting means for counting the value of the performance data and holding the count value; andalarm notifying means for comparing the count value with a threshold value and issuing an alarm notification to the network monitoring device when the count value exceeds the threshold value. An SDH section terminating device having a current data processing unit
The performance monitoring unit is provided with an allocation status flag that can be set / released from the network monitoring device, and when the allocation status flag indicates release, the output operation of the performance monitoring notification of the performance monitoring unit is stopped. An SDH section terminating device, characterized in that: 8. A section termination section for terminating an SDH section, a path termination section for terminating an SDH path, and provided in the section termination section and the path termination section, respectively, for detecting performance data from the section overhead and the path overhead. A performance monitoring unit that outputs the result as a performance monitoring notification, a count unit that receives the performance monitoring notification, counts the value of the performance data and holds a count value, and compares the count value with a threshold to determine the count value. In the SDH path terminating device including a current data processing unit having an alarm notifying unit for notifying an alarm to the network monitoring device when the threshold value is exceeded, setting / release from the network monitoring device to each of the performance monitoring units A possible allocation status flag is provided, and when the allocation status flag indicates release, the performance monitoring unit An SDH path terminating device, wherein an output operation of the performance monitoring notification is stopped.