WO2000027073A1 - Procede d'optimisation des acces a l'ensemble des instances d'objets d'une meme classe dans une base de donnees d'administration - Google Patents
Procede d'optimisation des acces a l'ensemble des instances d'objets d'une meme classe dans une base de donnees d'administration Download PDFInfo
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- WO2000027073A1 WO2000027073A1 PCT/FR1999/002647 FR9902647W WO0027073A1 WO 2000027073 A1 WO2000027073 A1 WO 2000027073A1 FR 9902647 W FR9902647 W FR 9902647W WO 0027073 A1 WO0027073 A1 WO 0027073A1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/28—Databases characterised by their database models, e.g. relational or object models
- G06F16/289—Object oriented databases
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- the present invention relates to a method for optimizing access to all of the instances of administered objects of the same given class, in an administration database (MIB) stored on a disk.
- MIB administration database
- the information access services of a MIB are based on the known CMIS standard (Common Management Information Service, IUT-T recommendation X.710), which describes the operations that can be performed on the specified objects according to the model of the standard G DMO (Guidelines for the Definition of Managed Objects, or ITU-T Recommendation X.722 recommendation).
- CMIS standard Common Management Information Service, IUT-T recommendation X.710
- G DMO Guidelines for the Definition of Managed Objects, or ITU-T Recommendation X.722 recommendation.
- the present invention uses the information management service of the CMIS standard.
- the administration applications call either on agents (43a, 43b and 43c) which are processes installed on remote machines connected by a network (30) with a machine supporting the administration application (4), or on local services of an administration system subsequently called “entity manager” which make it possible to locally manage a management information base MIB (Management Information Base) hierarchical in the form of a tree of object instances, without network access.
- MIB Management Information Base
- MIB administrative information management
- all the resources are represented in the form of objects in an object tree as shown in FIG. 2.
- the objects are themselves grouped into classes.
- the object of a given class has a number of attributes and each object instance has a name (N). Addressing is by distinguished name DN
- the DN of the object (51, figure 2) is "a / b / b".
- Figure 4 shows the operation of an information management service.
- This service uses a two-level architecture.
- the first level consists of a manager entity (4) playing the role of administrator who must view and control resources, consult characteristics, etc.
- the second level consists of agent entities
- the OpenMaster TM administration system marketed by BULL comprises one or more ISM-Manager administrators (Integrated System Management) and several agents (45a to 45c) (ISM / Agent).
- ISM / Agent agents marketed by other companies can be controlled by the OpenMaster TM administrator via standard protocols.
- the administrator-agent mechanism is based on an object model, in which the modeling of a resource consisting, for example, of system elements, software, states, users, etc., is based on a management information approach and structuring into objects.
- the "real" equipment of a networked system (a computer, a printer, a circuit, etc.) is represented by abstract objects organized in an administration information base (MIB, Management Information Base).
- MIB administration information base
- the characteristics of these objects name of a computer, characteristics of peripheral equipment, the status of this equipment such as a printer, etc.
- attributes of the objects are called the attributes of the objects.
- MOCs Managed Object Classes
- MIB Management Entity
- MOCs define the information that the MIB will contain for each type of resource, that is to say which attributes the object will have. MOCs can be interpreted as part of the MIB "scheme”.
- Each MOC is instantiated into several instances of managed objects (MOIs, Managed Object Instances) representing the actual occurrences of this type of resource.
- the attributes of the object representing the printer are "printer status" and "user”.
- a MOC object class "printer” can therefore be defined with the attributes "printer status” and "current user”.
- the object instances (MOIs) of the "printer” class can be the following:
- the status of the Printer 1 resource is activated and there is no current user when instantiating the example above.
- This example also includes the instances Imprim 2 and Imprim 3.
- An application such as "ISM-Monitor” provided by the OpenMaster TM administration system (4) makes it possible to display the MOIs and their states.
- ISM-Monitor can display in the form of a table the attributes of any MOI: for example the attributes "printer status" and "user” for any MOI of the "Printers" MOC.
- the set of administered objects forms an administration information base (MIB).
- MIBIet a subtree directly attached to the root of the separate tree of an information management base (MIB).
- MIB information management base
- Root a MOI object at the root of a MIBIet subtree.
- the OpenMaster TM administrator sees the system distributed through the MIB objects and the control of the system is done by manipulating the MIB objects and their attributes.
- the objects are visible thanks to the agents or the object manager attached to the OpenMaster TM administrator who map (mapping) the equipment in MIB in the form of an object tree.
- An agent can represent the state of a device by means of a corresponding associated object represented in the MIB.
- This cartography can associate an object with several "real" equipments, just as an equipment can be modeled in the form of several objects.
- the OpenMaster TM administrator sends commands to the agents (43a to 43c) and the agents send responses to his commands and notify events to the OpenMaster TM administrator (4) through integrating agents (45) using a protocol such as SNMP (Simple Network Management Protocol, 45a), CMIP (Common Management Information Protocol, 45b), or others such as DSAC / AEP (Distributed Systems Administration and Control / Administrative Exchange Protocol, 45c).
- SNMP Simple Network Management Protocol
- CMIP Common Management Information Protocol
- DSAC / AEP Distributed Systems Administration and Control / Administrative Exchange Protocol, 45c.
- Each administration protocol provides a certain number of simple operations, for example the CMIP protocol provides all the functions of the CMIS standard, namely the following:
- the administrator (41) can read the attributes of a MIB object by the M-GET operation.
- the agent (43) responds to an M-GET request by giving information on the equipment.
- the administrator (41) can modify the attributes of a MIB object (the M-SET operation).
- the agent modifies the "real" equipment according to the new attribute values provided by the administrator;
- the administrator (41) can execute an action on a MIB object by the M-ACTION operation.
- the agent (43) performs an action on the equipment according to the action requested by the administrator on the abstract object;
- the administrator (41) can create and delete objects from the MIB by the operations M-CREATE and M-DELETE;
- the agent (43) can notify an event occurring on an object of the MIB to the administrator by the operation M-EVENT.
- the agent sends information about an event concerning an abstract object to describe an event that occurred on "real" equipment.
- MIB administration information base
- MOI object instance
- containment tree Instances of administered objects (MOIs) are named by their position in the containment tree as follows:
- Each MOI has a relative distinguished name (RDN) which differentiates MOIs with the same and unique superior MOI ( father).
- RDN relative distinguished name
- MOC managed object class
- One of the attributes of each managed object class (MOC) is chosen to specify the instance's RDN for a given higher MOI. This attribute called the naming attribute is identified in GDMO forms called name binding.
- An MOC can have multiple potential superior naming links, but each MOI will use only one of them.
- Each MOI also has a unique Full Distinguished Name for the entire MIB.
- the global distinguished name (DN) of an object consists of its relative distinguished name (RDN) joined to the distinguished name (DN) of its superior, that is to say that the distinguished name (DN) of an instance of administered objects (ME) contains its own relative distinguished name (RDN) plus the relative distinguished names (RDNs) of all of its superiors in the containment tree down to the root.
- CMIS-DB One of the object administrators local to the ISM-Manager administrator is called CMIS-DB. It is responsible for storing part of the local MIB. The remanence of these stored objects is ensured by ISAM files (Index Sequential Access Method).
- ISAM Index Sequential Access Method
- This technology which describes the article structures (records) is a method of accessing files structured in the form of articles cut from one or more indexes and data information.
- the base object instance BOI makes it possible to identify an object in an administration information base (MIB) which is the starting point for an evaluation of the carried-filter pair in the object tree.
- MIB administration information base
- the scope selects a portion of the tree from this base object. For example, the scope “all sub trees” (“Whole subtree”) allows you to select all the sub trees of a given object. Among all the objects in the scope, the objects selected are those for which the evaluation of the filter is true. The operation is performed on the objects actually selected.
- the administrator sends an M-GET on objects and CMIS-DB reads and returns to the application the value of the attributes of the selected objects.
- the local CMIS-DB administrator To reach a base object instance (BOI), the local CMIS-DB administrator must pass from parent object to child object until reaching the node of the base object. This navigation operation can be long, if to move from one node to another, it is necessary to physically read all the threads of a node and among these choose the one with the right RDN, and so on .
- the computer Once the computer has reached the base object instance, it must read the attributes of the base objects that correspond to the scope in order to be able to evaluate the filter in memory, while the instances are read. on the machine disc.
- An object of the present invention is to propose a method for optimizing readings in an administration information base (MIB) organized in trees of instances of objects of various classes, of all the instances of a given class existing in this MIB.
- MIB administration information base
- the method according to the invention provided by the CMIS-DB process of the ISM-Manager entity makes it possible to apply a selection by the arguments scope / filter (scope / filter) of the standard operations of the CMIS service to offer the advantage to select these objects of given class through a single operation.
- the only CMIS scope which could reach these object instances in a single CMIS operation is a scope (type) "whole-subtree" starting from the root of the global MIB, apart from this, also contains sub-trees which do not belong to the local CMIS-DB administrator.
- the other alternative is to submit as many CMIS operations as there are MOI rootlet objects stored in the local CMIS-DB administrator with a scope of type all sub- tree (whole-subtree) and a baseObjectlnstance equal to each of these rootlets.
- the idea of the invention is to represent all the instances, of a given class of MOC administered objects, existing in the common information management service (CMIS-DB) by an object of specific class called " mocExtension ”automatically managed by the common information management service CMIS-DB to be the root of a virtual copy of all the instances of the same class.
- CMIS-DB common information management service
- mocExtension object of specific class
- Another advantage of this invention is to be able to use the physical indexes which have been optionally configured by the user as described below, in order to reduce the time cost of evaluating the argument CMIS filter, when it must be applied to the set of all instances of a given class.
- the indexes are configured on attributes identified in the filter, they can be used to physically read only a subset of the instances as described below. It is enough simply to reconfigure on-line (on-line) the indexes to no longer use the part of the key which memorizes the position of the instance in the capacity tree.
- An object instance of this specific class "mocExtension" is automatically created by CMIS-DB for each managed object class that the user declares to the CMIS-DB service.
- This declaration allows the user to specialize by configuration, as described below, the storage structure on disk of object instances of a given class which otherwise remains generic.
- the generic representation physically indexes only the mandatory objectClass attribute in the ISAM files for storing the MIB on disk.
- the specialization of the storage of an MOC allows the user to declare a certain number of the set of specific attributes of this MOC, as having to be indexed in the ISAM files for storage on disk.
- indexes includes the reference of the parent object in the containment tree, but CMIS-DB allows not to include this reference in the physical read key indexed in the precise case where the selection of objects on which CMIS operations must be applied is done by a first level scope directly under an instance of specific class "mocExtension" and a filter whose expression is such that the value of one or more indexed attributes of the OMC can be given as an indexed read key.
- CMIS-DB creates a new ISAM file intended to contain all the instances of this MOC and only this one. Consequently, when the user wants to select all or part of the instances of this MOC using a baseObjectlnstance argument BOI equal to the specific class instance "mocExtension" which represents this MOC, CMIS-DB only accesses the elements of this file and thus avoids visiting nodes of the tree containment (contaiment tree) which are not instances of this MOC and which are by construction in different ISAM files.
- the subject of the invention is a method for optimizing access to all the instances of administered objects of the same given class, existing in a hierarchical management information base (MIB) in the form of tree of instances of objects of various classes, characterized in that it comprises a step of automatic creation, by a manager (CMIS-DB) of an object of the management information base (MIB), of a instance of object of specific class "mocExtension" predefined to represent all the instances of a class of administered objects (MOC) existing in the manager, to allow the manager to automatically maintain a virtual copy of all the instances of objects of the class (MOC) represented by the specific class instance "mocExtension".
- CMIS-DB manager
- MIB management information base
- MOC administered objects
- the method comprises a step of consulting a collection of all the objects of the same given class referenced by the specific class instance "mocExtension" automatically created by CMIS-DB to virtually contain the elements of this collection, via a request for obtaining (M-GET) of the common information management service comprising the following arguments: base object, scope and filter in which the base object is the instance of the specific class "mocExtension" identified by the object identifier OBJECT IDENTIFIER of the sought class, the scope is the first level subordinate scope, and the filter is of determined structure.
- the method comprises a step of determining the type of naming to be used in the responses to the consultations by requests carried (scoped) under this instance of specific class "mocExtension” by updating a fixing attribute name (typeOfReplyNaming) telling the management service which type of naming to use.
- the method includes a step of returning responses to requests by the common information management service (CMIS-DB) according to the attribute fixing the type of naming to be used to identify the virtual copies of object instance subordinate to the object instance of specific class "mocExtension".
- CMIS-DB common information management service
- the scope parameter is detected by said common object management service (CMIS-DB) of the MIB which evaluates this scope argument as a browse of the objects belonging to the collection of all object instances of the class represented by the base object (baseObject) of specific class "mocExtension”.
- CMIS-DB common object management service
- the step of returning the responses transmits the full distinguished name (FDN: Full Distinguished Name) of the real object referenced in the argument "instance of managed objects" (MOI) of each response if the type of naming chosen is of a first type (naturalFDN); or the FDN of the virtual copy if the naming type is of a second type (specificFDN) or even direct addressing to physical storage in the case where the naming type is of a third type (nonSpecificForm).
- FDN Full Distinguished Name
- the distinguished name of an administered object instance contains its own relative distinguished name plus the relative distinguished names of all of its superiors in the containment tree down to the root.
- the method comprises a step of prefixing the value of the attribute to be indexed by the physical address "fatherMOInodRef of a father of the object in the containment tree) and of indexing the whole thing.
- the method is implemented by the CMIS-DB administrator to offer the possibility of deactivating the presence of "fatherMOInodRef in the attribute indexes, when the optimized search is done under the mocExtension objects introduced previously.
- Another object of the invention is to propose a device for delivering an object manager (CMIS-DB) for an administration information base (MIB) on a scent implementing the method according to the invention.
- CMIS-DB object manager
- MIB administration information base
- the device includes a managed object class (MOC) of specific class "mocExtension" which optimizes the browsing of the collection containing all the instances of the same given class, created and still existing in the MIB managed by the object manager (CMIS-DB) regardless of their position in the tree and without having to physically access the disk from any of the other object instances which are not of the desired class.
- MOC managed object class
- MIB MIB managed by the object manager
- the scope parameter is detected by said common information management service (CMIS) which evaluates this scope argument ( scope) as a browse of all the objects of the class identified by this instance of an object of specific class "mocExtension”.
- CMIS common information management service
- FIG. 1 represents an example of information base (MIB) in which two classes were declared by the user to be optimized and therefore in which two instances of specific class "mocExtension" were automatically created by the manager CMIS-DB object
- - Figure 2 represents a tree of objects constituting a MIB
- FIG. 4 represents the architecture of the OpenMaster TM manager, one of the components of which is CMIS-DB,
- FIG. 5 shows a diagram showing the different functions of translation and comparison between different alternatives of naming of the objects belonging to the sets identified by the objects of specific class mocExtension,
- FIG. 6 represents a window for displaying an instance of an object of specific class "mocExtension" generated by a graphical user interface forming part of the ISM-Monitor application.
- the present invention allows the user to optimize access to all of the instances of administered objects of the same given class, and existing in the MIB between instances of the managed object (MOI) belonging to the same MIB object management server instance managed by the CMIS-DB server.
- MOI managed object
- Figure 1 shows an example of an administration information base (MIB) stored in an object manager (CMIS-DB).
- MIB administration information base
- CMIS-DB object manager
- the classes X represented by squares with rounded angles (1 1 a to 1 1 d) and belonging to a first tree (1 1) are defined by the user and represented by the generic node.
- Another tree (17) also includes classes Y and Z also belonging to the first tree (1 1).
- the user can add classes of objects represented by a specific node indexed by the attributes chosen and this type of class is represented by rectangles with acute angles (17, 18).
- the CMIS-DB administrator can use the collection class
- the specific class type of object extension (14.1,) "mocExtension” is predefined by the CMIS-DB administrator and makes it possible to represent the set (18a to 18g) of objects of class Y defined in the naming attribute "moclD" of the specific class of object extension (14.1) "mocExtension”.
- An instance of a specific class "mocExtension” is automatically created by the object manager (CMIS-DB) for each specialized classes of managed objects (MOC).
- the specific object class "mocExtension” is a class predefined by the object manager (CMIS-DB) to represent the set of optimized instances of each of the user's managed object classes (MOC). It derives from the "top” class and has as attributes:
- a naming attribute "moclD" equal to the OBJECT IDENTIFIER of the managed object class (MOC) represented by this instance of the specific class "mocExtension".
- the naming attribute of the managed object class (MOC) (11) is named Y (mocID ⁇ Y). As shown by the lines (20) in Figure 1, it brings together all the objects of class Y.
- CMIS-DB object manager
- the second type of naming gives the specific full distinguished name "specificFDN” which corresponds to the distinguished name (DN, "distinguishedName") of the virtual copy of the referenced object, this name is calculated by the object manager (CMIS-DB ) from the value of the natural full distinguished name, "natural FDN”. Its value is the concatenation of the DN of the specific class object mocExtension representing the collection and an RDN (Node Reference) made automatically by CMIS-DB object manager to name the virtual copy.
- CMIS-DB object manager
- NonSpecificForm is a name that contains the internal reference to the object manager (CMIS-DB) of the node object of the instance, it is a direct pointer to the storage object of the instance d 'objects referenced.
- CMIS-DB object manager
- baseObject definition of the base object
- scope a filtered.
- CMIS-DB The object manager (CMIS-DB) offers translation and comparison actions between some of these different naming alternatives.
- CMIS-DB is considered by its applications as an object manager (object manager) which stores and manages part of the MIB in a database.
- the CMIS-DB server interacts with the CDSP router (33) through an interface (32). Interactions between all the components of the ISM administrator are carried out using CMIS messages carried by the CDSP router.
- FIG. 3 represents the CMIS-DB object manager according to the invention which comprises a CMIS operations manager (CMIS operations handier) (31) dialoguing according to the protocol of the (CDSP) (33) with the communication infrastructure, a programmable user extension module coded in SML (SML MIB toolkit) (34), a module (37) divided into a query executor sub-module (MIB queries performer), a navigation and range evaluation sub-module, filter, and an optimizer pre-filtering sub-module (372), a translator of global form into local form (38), an import / export module (39), a cache of the object containment tree (cache of containment tree) (40), a cache of object management instances (cache of MOIs) (49), a physical memory access module (50) that interfaces the server to the underlying database (51), a physical access transaction administrator module (storage transaction manager) (48) and a disk e physics (47).
- CMIS operations manager CMIS operations handier
- CDSP programmable user
- the development program kit (SML MIB toolkit) (34) loads any SML (Systems Management Language) extensions (341) for the user and provides primitives for accessing the administration information base in SML ( MIB) managed by the CMIS-DB object manager.
- SML MIB toolkit evaluates the pre-conditions and post-conditions posed by the user, during each operation on the administration information base (MIB) and executes the SML extensions which are triggered on these conditions.
- the request executor (37) on the administration information base actually performs the request or operation on the logical representation of the administration information base (MIB). It navigates according to the argument of the base object instance (BOI, baseObjectlnstance) of the request, to obtain the initial instance of the evaluation of the scope and the filter.
- the mode of operation of the request executor (37) of the administration information base (MIB query performer) depends on the arguments carried (scope) and filter of the operation.
- the executor of the requests of the administration information base (MIB query performer) searches the list of all the children to read the object management instances (MOI) corresponding to the scope.
- the decision as to whether a pre-filtering can be performed or not, depends on the analysis of the structure of the filter.
- the optimized search for MOIs selected by a filter consists in not physically reading all the MOIs belonging to the CMIS scope to apply the evaluation of the filter to them, but in using them when possible, the indexes which are positioned on their MOCs said to be optimized, in order to read only a subset of these MOIs instances.
- This last operation is called “preselection or pre-filtering”; it does not replace the step of evaluating the filter on each MOI returned to memory which takes place systematically in both cases.
- Pre-filtering by the indexes can therefore raise MOIs which in the end will be rejected by the evaluation stage of the CMIS filter, but it must not forget to read only one of the MOIs in the scope which check the filter.
- CMIS filters must conform to a defined structure to be recognized by the MOI search optimizer that these filters select.
- a CMIS filter recognized by the optimizer must be a logical expression that selects only MOIs of the same class. This class which must be one of the optimized MOCs declared to the CMIS-DB module.
- indexFilterPart indexFilterltem
- the order introduced between the different items does not reflect a syntactic order in the expression of the CMIS filter which can be arbitrary, but rather the physical order of the attributes as they exist in the indexes of the optimized JI .
- the executor of the requests of the administration information base (MIB query performer) reads in the underlying base the only subordinates which are indexed by the values attributes selected for pre-filtering. Then the request executor (37) of the administration information base (MIB query performer) evaluates the filter on each previously selected instance. If the evaluation is positive, it executes the operation on the logical representation of the administration information base (MIB) and returns the individual response to the manager of said common information management service (CMIS handier) (31) or the program development kit (MIB toolkit) (34).
- CMIS handier common information management service
- MIB toolkit the program development kit
- the query executor (37) goes through the list of all the children to read the MOIs corresponding to the scope.
- the pseudo-scope of the transversal relations instead of the list of children. This pseudo-scope is defined as being the virtual copy of all the instances of MOIs managed objects of the class identified by the specific class "mocExtension”.
- the request executor (37) of the administration information base (MIB query performer) evaluates the filter on each previously selected instance. If the evaluation is positive, it executes the operation on the basis of administration information (MIB) and returns the individual responses to the manager of said common information management service (CMIS handier) (31) or to the development program (MIB toolkit) (34).
- MOI registration records of optimized classes (ISAM files suffix-Me-1,, suffix-Me-n, in which 1 or n is the local form of the optimized MOC) is that of the generic representation of MOIs to which we concatenate the attribute or attributes to be used in the secondary indexes specified by the user via the mocStorageDefinition objects.
- the structure of these additional "indexableAttributeList" fields is as specified below:
- N 4 + add length of eac n bytes m bytes 10 bytes attribute index primarv index M seocndarv indexes
- indexableAttributeList has the following structure
- indexableAttributeList field which can be used to activate secondary indexes, the values of the indexable attributes are stored.
- FIG. 7 shows the specialization of storage for MOCs.
- a type of storage object is an object derived from the ManagedObjectlnstance (74) class and any subclasses, "genericMOI” (71), “optimizedMocMOI” (73), “mocExtension” (76), of this class for representations of optimized classes.
- This type of object contains an instance with all its attributes and hidden attributes (FDN of ME, .).
- the attribute list is actually a new collection of objects of class me-attributes (which contains a couple Attributld, AttributeValue).
- the value of the attribute to be indexed is prefixed by the physical address fatherMOInodeRef of a father of the object in the containment tree and where FDNofMOI is indexed by RDN.
- the CMIS-DB object manager offers the possibility, through the M-SET operation, of deactivating the presence of fatherMOInodeRef in the attribute indexes, when the search to optimize is done under the mocExtension objects introduced previously.
- FIG. 6 represents an instance of the specific class
- a first block (91) makes it possible to display the “OpclassO” identifier of the MOC thus represented.
- a second block (92) makes it possible to define the naming attribute of the type of response typeOfReplyNaming which determines the type of naming to be used in the responses to CMIS M-GET requests for consultations of all the instances which are of class "opClassO" in this example, and the user will have the choice between the three values "naturalFDN", “specificFDN”, "nonSpecificForm”.
- a third block (93) makes it possible to define the class of the object and to indicate that it is of the type of the specific class "mocExtension".
- a third block (94) is used to indicate the naming link used, in this case that it belongs to the sub-tree of the collection classes (MOCcollection).
- MOCcollection the sub-tree of the collection classes
- CMIS-DB Normally in a purely CMIS framework, CMIS-DB must respond to the scope under a specific class instance "mocExtension" with the name of the virtual copies of the referenced objects, which it does (see specificFDN mode), but , under option, it has the possibility of responding with the real name (ie naturalFDN) of the referenced objects to allow the application to navigate more easily in the responses.
- a third naming possibility ie objectlnstance in nonSpecificForm format
- Other modifications within the reach of the skilled person are also part of the spirit of the invention.
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EP99950878A EP1044535A1 (fr) | 1998-10-30 | 1999-10-28 | Procede d'optimisation des acces a l'ensemble des instances d'objets d'une meme classe dans une base de donnees d'administration |
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FR98/13646 | 1998-10-30 | ||
FR9813646A FR2785410B1 (fr) | 1998-10-30 | 1998-10-30 | Procede d'optimisation des acces a l'ensemble des instances d'objets d'une meme classe dans une base de donnees d'administration |
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1998
- 1998-10-30 FR FR9813646A patent/FR2785410B1/fr not_active Expired - Fee Related
-
1999
- 1999-10-28 WO PCT/FR1999/002647 patent/WO2000027073A1/fr not_active Application Discontinuation
- 1999-10-28 EP EP99950878A patent/EP1044535A1/fr not_active Withdrawn
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JPH04199933A (ja) * | 1990-11-29 | 1992-07-21 | Hitachi Ltd | ネットワーク管理システムおよびその運用方法 |
US5586255A (en) * | 1992-03-17 | 1996-12-17 | Tanaka; Yasuhiro | Network management operation system and network management operation method |
WO1995034975A1 (fr) * | 1994-06-13 | 1995-12-21 | Telefonaktiebolaget Lm Ericsson | Element de reseau pour reseau de telecommunication |
JPH08181772A (ja) * | 1994-12-21 | 1996-07-12 | Nippon Telegr & Teleph Corp <Ntt> | ネットワークオペレーションシステムにおけるmib構成方法及びそのバックアップ方法 |
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PATENT ABSTRACTS OF JAPAN vol. 016, no. 535 (E - 1288) 5 November 1992 (1992-11-05) * |
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 11 29 November 1996 (1996-11-29) * |
YODA I ET AL: "METHODS FOR CONSTRUCTING A MANAGEMENT INFORMATION BASE (MIB) IN TRANSMISSION NETWORK OPERATIONS", ELECTRONICS & COMMUNICATIONS IN JAPAN, PART I - COMMUNICATIONS,US,SCRIPTA TECHNICA. NEW YORK, vol. 76, no. 9, 1 September 1993 (1993-09-01), pages 21-33, XP000449114, ISSN: 8756-6621 * |
Also Published As
Publication number | Publication date |
---|---|
FR2785410B1 (fr) | 2002-01-25 |
EP1044535A1 (fr) | 2000-10-18 |
FR2785410A1 (fr) | 2000-05-05 |
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