Network fault information management system in which fault...

Details Network fault information management system in which fault... Network fault information management system in which fault...

2000-01-10

2002-12-24

Iqbal, Nadeem (Department: 2784)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C709S223000, C709S226000

Reexamination Certificate

active

06499117

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a network management system. More particularly, the present invention is directed to a network management system to manage the state of a fault network element and to notify a fault occurrence location in a large-scale communication network.
2. Description of the Related Art
An conventional example of a network fault management system will be described in Japanese Laid Open Patent Application (JP-A-Heisei 5-33692). According to the system described in this reference, the state of a fault is checked based on a structure data of a tree form. That is, a knowledge base is previously prepared to store a fault diagnostic tree in which nodes represent various fault states. The fault diagnostic tree is traced based on fault data received from an apparatus in which any fault has occurred, to specify a kind of the fault.
Also, in the large-scale network, distribution management is generally used for the network fault management system. In the distribution management system, fault data is displayed for every distributed network management system. The fault data indicative of a fault which has occurred in the network is individually stored in the network management system in the order of occurrence of the fault. The fault data are displayed in a table form and are displayed in a graphic form, using the structure diagram of network elements. Instead, the apparatus in which the fault has occurred is displayed with a different color from normal apparatuses on the map showing the network structure.
In the network fault data management system described above, the fault can be specified using the fault diagnostic tree. However, the processing for specifying a fault occurrence location is not considered.
Also, for example, in the distributed network management system, the fault occurrence apparatus can be displayed on the network configuration screen. However, it is not possible to show what fault occurs where in the apparatus on the same screen. For this reason, the operator needs to change a control to the network management system which manages the fault occurrence apparatus and to change a display screen to the fault data screen of the apparatus. Especially, when a plurality of faults which have occurred in a plurality of network management systems should be displayed, the number of times of the changing operation of the display screen increases. Moreover, the fault data is dynamic, and generally, the occurrence and restoration of the faults are repeated in the large-scale network. Therefore, in the conventional fault data management system, the load of the operator becomes heavy.
In the conventional large scale network fault management system, it is this difficult for the operator who manages the network to grasp the occurrence locations of all faults which have occurred in the system and the states of the faults.
In conjunction with the above description, a large scale alarm display system is described in Japanese Laid Open Patent Application (JP-A-Heisei 2-301895). In this reference, the large scale alarm display system is composed of a network management system and a network alarm display unit. The network management system receives alarm information from each of network elements of the large scale network. Then, network management system carries out a display control of the alarm information from a level indicative of alarm contents of the whole large scale network to alarm contents of the network element as a minimum component of the network for every layer. The network alarm display unit receives the output of the network management system to display the alarm information.
Also, a network structure display system is described in Japanese Laid Open Patent Application (JP-A-Heisei 6-205007). In this reference, a station (ST
2
) and branch units (BB
1
and BB
2
) which are connected to a component control unit (DU
1
) are displayed on a ring (
16
a
). A network management unit (SGM) connected to the branch unit (BB
1
) and a station (ST
1
) connected to the branch unit (BB
2
) are displayed on rings (
17
a
and
17
b
), respectively. The structure is determined by referring to a physical connection form and by detecting a logical connection order, and then is displayed on a CRT.
Also, a communication network fault display system is described in Japanese Laid Open Patent Application (JP-A-Heisei 6-141029). In this reference, a summary screen/a portion screen of a fault and a warning sound are determined based on programs (
106
to
109
) stored in a program memory (
110
) using a display information data base (
104
) which stores a network map group and relation of communication network elements and display data. The determined screen group is automatically displayed on a CRT (
111
), and a buzzer sound is outputted from a buzzer sound outputting unit (
114
). Thus, in a network management display system, the screen group indicating the whole states and details of the fault is automatically determined and displayed to quickly inform to an operator.
Also, a communication network monitoring system is described in Japanese Laid Open Patent Application (JP-A-Heisei 7-143123). In this reference, the network monitoring system collects fault alarms of components of a communication network to display on a hierarchical monitor screen. In this case, the fault alarms notified from the components of the communication network are classified for each of display elements on the monitor screen, and fault information related with the fault alarm is displayed in neighborhood of the relating display element. Thus, the fault alarm can be related with the corresponding display element in an upper level network map.
Also, a fault diagnosis apparatus is described in Japanese Laid Open Patent Application (JP-A-Heisei 7-143123). In this reference, a central processing unit (
2
) is connected with an input unit (
3
), a display unit (
4
), and a storage unit (
1
), and is composed of a diagnosis unit (
20
) for diagnosing a fault. A plurality of diagnosis data are stored in the storage unit (
1
) in correspondence to fault states, respectively. The diagnosis unit (
20
) is composed of a diagnosis tree selecting section (
21
), a testing section (
22
), a diagnosis tree designating section (
21
) and a test result determining section (
23
). The diagnosis tree selecting section (
21
) selects a diagnosis tree and a node relating to a fault to be handled from among nodes indicative of the fault states stored in a knowledge base (
11
). The testing section (
22
) tests in accordance with the content of the selected node. The test result determining section (
23
) selects the node having the highest probability from among the nodes indicative of the fault states and informs it to the diagnosis tree designating section (
21
) and controls the display unit (
4
) to display it.
Also, a fault diagnosis apparatus is described in Japanese Laid Open Patent Application (JP-A-Heisei 7-200499). In this reference, a central processing apparatus (
2
) is connected with an input unit (
3
), a display unit (
4
) and a storage unit (
1
). The central processing apparatus (
2
) is provided with a diagnosis unit (
20
). A plurality of diagnosis data are stored in the storage unit (
1
) in correspondence to fault states, respectively. The diagnosis unit (
20
) is composed of a diagnosis tree selecting section (
21
), a diagnosing section (
22
), a diagnosing result determining section (
23
). The diagnosis tree selecting section (
21
) selects nodes related to a fault to be measured from among nodes of the diagnosis tree of a knowledge base (
11
) stored in the storage unit (
1
). The diagnosing section (
22
) carries out the diagnosis based on the content defined in each of the selected nodes. The diagnosing result determining section (
23
) specifies the node indicating the fault state with the highest probability from among the selected nodes based on the diagnosis results and controls the display unit (
4
) to display the specified node and the

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