KR20010046979A - Method for administrative state control of network resources in ATM networks - Google Patents

Abstract

PURPOSE: A method for controlling an administrative state of network resources in an ATM(Asynchronous Transfer Mode) information super high-way is provided to assign priority to three states, so as to promptly detect the change of the state according to the priority. CONSTITUTION: Each MO(Managed Object) existing in a communication network maintains administrative state information of each container-MO. The information is maintained through correlation, where the state of a specific MO is changed according to the state change of an optional MO. The administrative state assigns priory according to each state, to decide the state change of a specific MO using the priority when the state of an optional MO is changed.

Description

Method for administrative state control of network resources in ATM networks

The present invention relates to a method for controlling an administrative state of a network resource in an asynchronous transfer mode (ATM) ultrahigh-speed information network, and more particularly, to prioritize the managed state of each managed object (MO). The present invention relates to a method of assigning a rank and causing a change of its own state according to the priority when a state change occurs in each object.

In general, the method of controlling the state of each resource in the network is specified in ITU-T Recommendation X.731, which describes the state used for control of managed objects. It defines the usage state, the management state, and describes general relations between the states.

Each of these state information is the basic data for efficient use of network resources, but in actual network operation, state management is not easy due to the hierarchical network structure or the complex inter-involvement of managed objects.

Among these, the operating state has been discussed as a matter of failure in network operation, but there is no discussion about the management state.

Therefore, a lot of technology development for each state control is required.

In view of the conventional requirements as described above, the present invention gives priority to each of the three managed states in the control of the managed state among the state of the network resource, and can quickly grasp the state change according to the priority. The goal is to implement a way to do this.

1 is a transition diagram of a management state in an asynchronous transmission mode ultra-high speed information network to which the present invention is applied.

2 is a management object structure diagram of an asynchronous transmission mode high speed information communication network to which the present invention is applied.

3 is a structural diagram illustrating a dependency relationship between each managed object in an asynchronous transmission mode high speed information communication network to which the present invention is applied;

4 is an explanatory diagram showing a connection relationship of a link to which the present invention is applied;

5 is a state explanatory diagram showing a state value of each management object for determining a management state of a link according to an embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

1: Locked state 2: Shutdown state

3: Loose state 4: Subnetwork 1

41: node 1.1 42: node 1.2

43: node 1.3 5: virtual channel layer network

6: Virtual path layer network 7: Management status

8: State of connected node 1 9: State of connected node 2

10: board status 11: own status

In order to achieve the above object, in the network resource control method of the network,

Manage each management object existing in the communication network to maintain management state information of each higher-level object, but maintain information according to an association relationship in which a state of a specific management object changes according to a change in state of an arbitrary management object;

The management state is characterized by assigning a priority value according to each state so as to determine a state change of a specific management object by using the priority value when a state of any management object is changed.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

According to the Telecommunications Management Network (TMN) structure, each physical network element is defined as a management object, and the management objects have a parent-child dependency depending on the network structure.

ITU-T Recommendation X.731 defines the states used to control managed objects as operational states, used states, and managed states, and generally describes the relationships between the states. Among these, the administrative state is used by the network operator to restrict the use of the subscriber to a specific managed object for operational reasons. Therefore, the management state is set independently of the operation state and the use state. The management state may be set according to the type of the management object, but can be generally divided into three cases as follows, and the transition between them is shown in FIG. 1.

First, locked state (1) refers to a state in which a user's new access to a corresponding resource is completely blocked. That is, the current service is still provided but new attempts are not allowed.

Secondly, the shutdown state 2 is the same as the locked state 1 in that a new service is denied, but a state in which the service is in progress can be released. In the shutdown state (2), if no user uses the resource, it is automatically changed to the locked state (1).

Third, the unlocked state 3 is a normal state in which resources can be freely used.

The operator can freely change to another state regardless of the current state of the managed object. However, you cannot change a managed object that is in exceptionally locked state (1) to shutdown state (2).

In a complex interconnected network, when you change the state of one managed object, the state of the managed object that depends on it also needs to change. The relationship between the management objects forming the entire network will be described with reference to FIG. 2.

First, based on subnetwork 1 (4), subnetwork 1 (4) has three nodes (node 1.1, node 1.2, node 1.3) (41, 42, 43) and two links (link 1.1, link 1.2). ) Is dependent.

That is, when the management state of the subnetwork 1 (4) is changed, the management state of the three nodes 41, 42, 43 and two links (link 1.1, link 1.2) subordinate to the management of the subnetwork 1 (4) is also managed. It should change with state.

In addition, three ports (port 1.1.1, port 1.1.2, port 1.1.3) are dependent on node 1.1 (41). Therefore, if the management status of node 1.1 (4) is changed, the three ports belonging to it (port 1.1.1, port 1.1.2, port 1.1.3) should also change the management status as node 1.1 (41).

Note that when the state of port 1.1.2, the end point of link 1.1, and port 1.1.3, the end point of link 1.2, is changed, the state of the link also changes.

In addition to the dependencies (subnetwork> nodes> ports) due to the physical dependencies, the same propagation process is followed even if there are dependencies caused by the hierarchical structure of the network.

In addition, according to the 'ITU-T Recommendation G.805', the asynchronous transmission mode network can be managed by dividing it into several layer networks. In this case, the asynchronous transmission mode ultra-high speed information communication network is a virtual path as shown in FIG. 3. (5) and Virtual Channel (VC) (6) are divided into two hierarchical networks. The VC layer network 5 and the VP layer network 6 have a client-server relationship with each other. That is, the server of the link 1 of the VC layer network 5 becomes a trail T1 of the VP layer network 6, the link 2 of the VC layer network 5 and the T2 of the VP layer network 6, Link 3 of the VC layer 5 and T3 of the VP layer 6 also have the same relationship.

In the VP layer 6, T1 and T3 pass through link 1, and because they share an endpoint with link 1, when the state of VP link 1 changes, the state of link 1 and link 3 of the VC layer 5 also changes. do.

Similarly, changing the state of link 2 of the VP layer 6 changes the state of link 2 and link 3 of the VC layer 5.

However, when the state change of the link of the VP layer network changes the state of the VC layer network link, it is limited only when the endpoints are shared. That is, in the case of T4 that crosses the VP layer network link 2 but does not share an endpoint, the state change of the VP layer network link 2 is not affected. Accordingly, the VC layer network link corresponding to T4 is not shown in the figure.

In addition, the subscriber access point of the VC layer network 5 also depends on the subscriber access point of the VP layer network 6. That is, the change of the state of port 1.1 of the VP layer 6 changes the state of the port 1.1.1, port 1.1.2 and port 1.1.3 of the VC layer 5. Also, although not modeled as an object, the state change of a board (not shown) that is a physically higher object also affects the VP link, which is a lower object.

The above propagation process is summarized as ⓐ.

Ⓐ propagation process of each managed object

1.Node-> VP Link-> VC Link

2. Node-> VP Subscriber Access Point-> VC Subscriber Access Point

3. Node-> FR (Frame Relay) Subscriber Access Point-> FR Subscriber Sub Access Point

4. Board-> VP Link-> VC Link

5. Board-> VP Subscriber Access Point-> VC Subscriber Access Point

6. Board-> FR Subscriber Access Point-> FR Subscriber Access Point

7. VP Link-> VC Link

8. VP Subscriber Access Point-> VC Subscriber Access Point

9. FR subscriber access point-> FR subscriber access point

In addition, each managed object must have management status information of its parent object because its state changes due to the change of state of other managed objects. The parent object of each managed object is the same as ⓑ.

Ⓑ its parent object according to the management object

VP links: nodes and boards at both ends

2.VC link: VP link

3. VP subscriber connection point: node, board

4. FR subscriber access point: node, board

5. VC subscriber access point: VP subscriber access point

6. FR subscriber access point: FR subscriber access point

On the other hand, each management object first checks all related parent objects and their management state when the management state change of the parent object or its management state is changed, and then determines its management state accordingly.

When a management state change of any one of the parent objects is notified or its management state changes, the corresponding management object should check the management state of all related parent objects.

At this time, there are several ways to check the management status of the parent object. First, when notified of the change of the management state, there is a method of determining one's own management state by querying the management state of all the parent objects. This has the disadvantage of increasing network traffic by querying all upper objects whenever the management status changes.

In addition, there is a method of remembering a previous state, which means that as the level of a higher object increases, the previous state to be remembered increases exponentially and becomes difficult to implement.

Accordingly, the present invention newly applies a method of changing its own management state to the highest priority state by assigning each priority to three management states. In other words, the priority of the three management states is expressed numerically to simplify the management of complex management states with simple arithmetic operations.

The priority of the management status is as follows.

Locked (2)> Shutdown (1)> Unlocked (0)

That is, the locked state has the highest priority, the unlocked state has the lowest priority, and these priorities are given in the order that the user is most restricted among the states.

By prioritizing the managed state, the above-mentioned disadvantage can be compensated for by storing the managed state of all the parent objects that each managed object can affect, and the managed state of the managed object is defined by simple arithmetic comparison. This allows for rapid change of management status.

The operation of quickly determining the state change when the state change occurs in the management object by applying the above priority will be described using the VP link shown in FIG. 4 as an example.

FIG. 4 illustrates a link of a virtual path layer network connecting two nodes. In order to determine the management state of link 1 shown in FIG. 4, the management state 7 of link 1 is illustrated in FIG. 5. Must know node 1 (nearNode) (8), node 2 (farNode) (9) and the board state (10) indicating the state of board 1.1, board 2.1, and its state (11). do.

This is the same as ⓑ that specifies information about the parent object that should be known when changing state.

When a state change occurs in each object in the state having the state information of the parent object, the state change having the highest priority among them is set as its own state change.

This is represented by the following equation 1.

Equation 1) Management state = maximum value (max) {own state (myState), node state (nearNodeState, (farNodeState)), board state of both sides}

In this case, the board state should also distinguish both boards on both sides of the link. This classification is performed in the integrated network management system, which is a higher system, and the description of the integrated network management system does not correspond to the scope of the present invention.

In the above, the maximum value of each state value is selected as its own management state value. If a change is made to a higher-level object in the current state of oneself and a value higher than the state value thereof is input, the state of the state corresponds to the high value. It is set to the state.

The management state control method as described above can be applied not only to the management state but also to the management of the operation state and the use state in the network management, as well as to the general network other than the asynchronous transmission mode ultrahigh speed information communication network as in the example of the present invention. Of course it can.

As described in detail above, the present invention stores the management state of all upper objects that each managed object can affect, and gives priority among the management states, so that the managed state of the managed object is simple by arithmetic comparison. It is possible to quickly control the management status by defining the

In addition, preferred embodiments of the present invention are disclosed for the purpose of illustration, those skilled in the art will be able to various modifications, changes, additions, etc. within the spirit and scope of the present invention, such modifications and modifications belong to the following claims You will have to look.

Claims (5)

In the state control method of network resources in a communication network, Manage each management object existing in the communication network to maintain management state information of each higher-level object, but maintain information according to an association relationship in which a state of a specific management object changes according to a change in state of an arbitrary management object; The management state is assigned a priority value according to each state, when the state of any management object to determine the state change of a specific management object using the priority value, characterized in that the asynchronous transmission mode ultra-high speed information communication network How to control the management status of network resources in the network. The method of claim 1, As the information of the higher level object that the arbitrary management object should have, The virtual path (VP) link of any managed object can be used to obtain node and board information at both ends of the link. The virtual channel (VC) link provides virtual path link information. The virtual path subscriber access point provides node and board information. Frame Relay (FR) subscriber access points provide node and board information. The virtual channel subscriber access point receives the virtual path subscriber access point information. The frame relay subscriber access point comprises frame relay subscriber access point information, respectively. The method of claim 1, When the relation of each management object affected by the change of state due to the change of state of the arbitrary management object is sequentially indicated, Any node-> virtual path (VP) link-> virtual channel (VC) link order, Node-> virtual path subscriber access point-> virtual channel subscriber access point Node-> Frame Relay Subscriber Access Point-> Frame Relay Subscriber Access Point, Board-> Virtual Path Link-> Virtual Channel Link Board-> Virtual Path Subscriber Access Point-> Virtual Channel Subscriber Access Point, Board-> Frame Relay Subscriber Access Point-> Frame Relay Subscriber Access Point, Virtual Path Link-> Virtual Channel Link Virtual path subscriber access point-> virtual channel subscriber access point order, Frame relay subscriber access point-> Frame relay subscriber access point control method of the network resource management state in the asynchronous transmission mode high-speed information network. The method of claim 1, The method of controlling the management status of a network resource in an asynchronous transmission mode ultra-high speed information communication network, wherein the priority value is assigned according to each state of the management state. The method of claim 1, The state change determination of a specific management object using the priority value assigned to the management state is given to the management state of each management object related to the priority value given to the specific management object and the association relationship with the specific management object. And a management state having a maximum value among the specified priority values as a management state of the specific management object.