WO2001071975A2 - Procedes d'identification de connexions dans un reseau - Google Patents

Procedes d'identification de connexions dans un reseau Download PDF

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Publication number
WO2001071975A2
WO2001071975A2 PCT/IB2001/000435 IB0100435W WO0171975A2 WO 2001071975 A2 WO2001071975 A2 WO 2001071975A2 IB 0100435 W IB0100435 W IB 0100435W WO 0171975 A2 WO0171975 A2 WO 0171975A2
Authority
WO
WIPO (PCT)
Prior art keywords
network
equipment
pieces
elements
piece
Prior art date
Application number
PCT/IB2001/000435
Other languages
English (en)
Other versions
WO2001071975A3 (fr
WO2001071975A9 (fr
Inventor
Joshua Klipper
Aviv Prital
Original Assignee
Adc Telecommunications Israel Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Adc Telecommunications Israel Ltd. filed Critical Adc Telecommunications Israel Ltd.
Priority to AU2001244430A priority Critical patent/AU2001244430A1/en
Priority to IL15160601A priority patent/IL151606A0/xx
Publication of WO2001071975A2 publication Critical patent/WO2001071975A2/fr
Publication of WO2001071975A3 publication Critical patent/WO2001071975A3/fr
Publication of WO2001071975A9 publication Critical patent/WO2001071975A9/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0803—Configuration setting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/12—Discovery or management of network topologies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
    • H04Q11/0478—Provisions for broadband connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0057—Operations, administration and maintenance [OAM]
    • H04J2203/0058—Network management, e.g. Intelligent nets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0057—Operations, administration and maintenance [OAM]
    • H04J2203/006—Fault tolerance and recovery

Definitions

  • the technical field relates generally to networks. More particularly, it pertains to learning of undesired couplings between elements in networks.
  • This access network defines a star topology because the access network includes multiple elements (customers) connecting to a single switching office.
  • Modern access networks have grown beyond wires to include fiber optic cables to accommodate the transmission of video and other types of data. Whereas older networks coupled by wires are better suited for simpler topologies, such as point-to-point and star topologies, modern networks using fiber optic cables tend toward a ring topology since the ring topology offers many benefits, such as lower insertion loss associated with the addition of network taps.
  • it can be difficult for an installer to properly connect networks using fiber optic cables in a ring topology. The reason for the difficulty is because a ring topology may include multiple rings. A probability exists that an installer will couple a network element from one ring to a network element in another ring. Such an installation may render the access network inoperable, and would eventually lead to customers' frustration and expensive repairs.
  • An illustrative aspect includes a system to enhance network configuration.
  • the system comprises a network.
  • the network includes at least two pieces of equipment. One of the at least two pieces of equipment is coupled to the other of the at least two pieces of equipment.
  • the system further comprises a network manager to manage the network.
  • the network manager generates a report.
  • the report is indicative of physical interconnections of the at least two pieces of equipment. The report is available before the network is configured and can be used to identify improper physical interconnection.
  • the data structure comprises at least one data member interface to represent a coupling relationship between at least two pieces of equipment.
  • the data member interface includes a data member system to represent a system in a network, a data member cage to represent a cage in the system, and a data member slot to represent a slot in the cage.
  • Another illustrative aspect of the present invention includes a method for enhancing network configuration. The method includes an act for identifying a physical relationship between at least two elements in a network. The method also includes an act for presenting the relationship so as to allow for identification of an undesired relationship between the at least two elements in the network.
  • Figure 1 is a block diagram of a system according to one aspect of the present invention.
  • Figure 2 is a structure diagram of a data structure according to one aspect of the present invention.
  • Figure 3 is a process diagram of a method according to one aspect of the present invention.
  • FIGS 4A-4C illustrate tabular and pictorial diagrams of data according to one aspect of the present invention.
  • the embodiments of the present invention focus on enhancing network configuration by learning about the physical coupling between at least two elements on the network so as to ascertain whether undesired physical couplings exist.
  • modern networks have built-in capabilities to generate alarms if undesired conditions exist in various layers of the network, it is difficult to generate such alarms at the lowest layer of the network— the physical layer— because the network cannot distinguish between a desired physical connection and an undesired physical connection.
  • the trace byte is part of the overhead of a network to identify improper connections at the physical layer.
  • the trace byte can be used only after the network is configured.
  • the network may or may not generate alarms or may generate misleading alarms regarding improper connections upon powering- up of the entire network.
  • Some of the alarms that may not be generated include Loss of Frame (LOF) or Loss of Pointer (LOP).
  • the embodiments of the present invention attempt to learn about the physical coupling relationship between each element on the network prior to configuration. This information is then presented to the operator of the network to help the operator quickly identify any installation problems. The discussion of the embodiments of the present invention is now presented below.
  • FIG. 1 is a block diagram of a system according to one aspect of the present invention.
  • System 100 includes an access network 102.
  • the system 100 includes a switching office 110, and a number of premises, such as premises 104, 106, and 108. These premises include any premises that can house telecommunications equipment.
  • the switching office 110 and premises 104, 106, and 108 include a number of pieces of equipment, such as a piece of equipment HOo-
  • equipment means the inclusion of telecommunications equipment such as access multiplexers or data link controllers, or other devices. In the idiom of telecommunications, a piece of equipment can be called an "element" of the access network 102.
  • the access network 102 is arranged in a topology that includes a ring topology.
  • the access network 102 can be other topologies, such as point-to-point, star, or tree.
  • the ring topology of the access network 102 includes a number of rings.
  • One of the rings includes the piece of equipment 110o, a piece of equipment 104 0 , a fiber optic cable 102 0 that couples the piece of equipment 110 0 and the piece of equipment 104 0 ; a piece of equipment 106o, a fiber optic cable 102 ⁇ that couples the piece of equipment 104 0 and the piece of equipment 106 0 ; a piece of equipment 108 0 , a fiber optic cable 102 2 that couples the piece of equipment 106 0 and the piece of equipment 108 0 ; and a fiber optic cable 102 3 that couples the piece of equipment 108o and the piece of equipment 110 0 .
  • Another ring includes a piece of equipment 110 f , a piece of equipment 104] , a fiber optic cable 102 that couples the piece of equipment 110 1 and the piece of equipment 104 ⁇ ; a piece of equipment 106 ⁇ , a fiber optic cable 102 5 that couples the piece of equipment 104, and the piece of equipment 106] ; a piece of equipment 108 ⁇ , a fiber optic cable 102 6 that couples the piece of equipment 106
  • the switching office 110 may include a network manager that manages the access network 102.
  • the network manager may include a software application for managing the access network 102. Because a possibility exists that an installer may have installed the access network 102 improperly, it is beneficial to identify physical connection for the pieces of equipment in the access network 102. Once this information is obtained, whether the access network 102 is improperly installed can be inferred.
  • the network manager identifies physical connection of the pieces of equipment by sending a test packet down to one of the rings of the access network 102. For illustrative purposes only, suppose the network manager at the switching office 110 sends a test packet from the piece of equipment 110 0 . The test packet will travel along the fiber optic cable 102 0 to the piece of equipment 104 0 .
  • An identification of the piece of equipment 104 0 is recorded.
  • the identification is recorded in the test packet.
  • the test packet then travels along the fiber optic cable 102] to arrive at the piece of equipment 106 0 .
  • the piece of equipment 106o is also recorded. In one embodiment, this is recorded in the test packet.
  • the test packet then travels the fiber optic cable 102 2 to arrive at the piece of equipment 108 0 .
  • the piece of equipment 108 0 is also recorded. In one embodiment, this is recorded in the test packet.
  • the test packet travels along the fiber optic cable 102 3 to arrive back at the piece of equipment 110 0 .
  • Each of the pieces of equipment visited by the test packet is recorded and is analyzed by the network manager.
  • the recorded pieces of equipment define a route taken by the test packet. If the route is a route that would form a desired topology, then the route is a desired route describing desired couplings or relationships between the pieces of equipment or elements in the access network 102.
  • the system 100 includes a toll office 122 (or a tandem office).
  • the toll office 122 is coupled to the switch office 110 through a toll connecting trunk 122 0 .
  • the toll office 122 is also coupled to another switch office 120 through another toll connecting trunk 122] .
  • the switch office 120 is part of an access network 112.
  • the access network 112 includes a number of premises, such as premises 114, 116, and 118.
  • the access network 112 is arranged in a topology that includes a ring topology. However, the access network 112 includes a defective ring topology due to improper installation.
  • One of the rings includes the piece of equipment 120 0 , a piece of equipment 118 0 , a fiber optic cable 112 0 that couples the piece of equipment 120 0 and the piece of equipment 1 18 0 ; a piece of equipment 116 0 , a fiber optic cable 112
  • Another ring includes a piece of equipment 120 ⁇ , a piece of equipment 114
  • the switching office 120 may include a network manager that manages the access network 112.
  • the network manager at the switching office 120 sends a test packet from the piece of equipment 120 0 .
  • the test packet will travel along the fiber optic cable 112 0 to the piece of equipment 118 0 .
  • the piece of equipment 118 0 is recorded.
  • the test packet then travels along the fiber optic cable 112, to arrive at the piece of equipment 116Q. This is also recorded.
  • the test packet then travels the fiber optic cable 112 6 to arrive at the piece of equipment 118, . This is also recorded.
  • the test packet travels along the fiber optic cable 112 7 to arrive at the piece of equipment 110] .
  • the identify of each of pieces of equipment is recorded in the test packet.
  • the identity of each of the positions or pieces of equipment visited by the test packet is then sent to the network manager for analysis. Because the route of the test packet does not form a desired topology, there are undesired couplings or relationships between the pieces of equipment or elements in the access network 112. The precise locations of the undesired couplings may be obtained by studying the route of the test packet.
  • the access network 102 may be considered a fiber optic network because the access network 102 comprises pieces of equipment interconnected by the plurality of fiber optic cables 102 0 , 102, , 102 2 , 102 , 102 4 , 102 5 , 102 6 , and 102 7 .
  • the access network 102 includes an optical time division multiplexing network.
  • the optical time division multiplexing network includes a Synchronous Optical Network (SONET).
  • SONET Synchronous Optical Network
  • the optical time division multiplexing network includes a Synchronous Digital Hierarchy network (SDH). These rings may send information in one direction only (the direction of the arrow as shown).
  • the ring topology of the access network 102 includes a counter-rotating dual-ring topology.
  • Another equivalent term for the access network 102 includes "the local loop.”
  • Other equivalent terms for the switching office 110 include “end office” and "local central office.”
  • Figure 2 is a structure diagram of a data structure according to one aspect of the present invention.
  • the structure 200 includes a data member interface 202.
  • the data member interface 202 represents a coupling relationship between at least two pieces of equipment in a network.
  • the data member interface 202 includes a data member system 204.
  • the data member system 204 represents a piece of equipment or an element on a network.
  • the data member interface 202 includes a data member cage 206.
  • the data member cage 206 represents a particular hardware cage in the system as represented by the data member system 204.
  • the data member interface 202 includes a data member slot 208.
  • the data member slot 208 represents a particular slot in the hardware cage in the system.
  • each piece of equipment in a network includes a number of connections, such as an output connection and an input connection.
  • the structure 200 may be instantiated twice.
  • the first instantiation is to represent the output connection and the second instantiation is to represent the input connection.
  • the data members system, cage, and slot of the first instantiation contain information about another piece of equipment on the network to which a packet will be forwarded.
  • the data members system, cage, and slot of the second instantiation contain information about another piece of equipment on the network from which a packet will be received.
  • FIG. 3 is a process diagram of a method according to one aspect of the present invention.
  • the process 300 includes an act 302 for identifying a relationship between at least two elements in a network.
  • the act of identifying 302 includes an act of recording an identification of equipment or network element as a packet travels from one element to another element on the network.
  • the act of identifying 302 includes an act of forming a route from the result of the act of recording. In one embodiment the act of forming a route uses the information recorded in the packet.
  • the route defines a relationship between at least two elements on the network.
  • the act of identifying 302 includes an act of determining if the route is an undesired route. If the route is an undesired route, then the relationship between the at least two elements on the network includes an undesired relationship.
  • the act of identifying 302 includes an act 304 for storing an identification of an element in a packet that travels from one element to another element on a network.
  • the act of storing 304 may store a number of identifications as the packet travels. This set of identifications defines a route. If the route is an undesired route, then the relationship between the at least two elements on the network includes an undesired relationship.
  • the act of identifing 302 is executed through a software application running on a Data Communication Channel of a network.
  • the network is selected from a group consisting of a Synchronous Optical Network and a Synchronous Digital Hierarchy network.
  • the act of identifying 302 can be iterated.
  • the act of identifying 302 can be iterated until no new relationships among elements on the network is learned with a test packet.
  • the process 300 includes an act 306 for presenting the relationship so as to allow identification of an undesired relationship between at least two elements on the network.
  • the act of presenting 306 includes presenting the information in a tabular format or in a pictorial format.
  • Figures 4A-4C illustrate tabular and pictorial diagrams of data according to one aspect of the present invention.
  • Figure 4 A illustrates a tabular diagram 400 A.
  • the tabular diagram 400A can be formed and presented to a user after at least one relationship between two elements on a network is learned. The user can use the tabular diagram 400A to determine if an undesired coupling exists between at least two elements on the network.
  • the tabular diagram 400A includes row 402 A for representing the system.
  • the system includes an element on the network, such as a computer, a telephone, or other devices.
  • the tabular diagram 400A includes row 404 A for representing a cage in the system.
  • the tabular diagram 400A includes row 406A for representing a slot in the cage.
  • the tabular diagram 400A includes a number of columns, such as columns 408 A. Each of these columns represents an element on the network. Column 408 A represents an element 1. Column 408A includes a number of cells, such as cells 408A 0 , 408A
  • column 410A represents an element 2.
  • Column 410A includes a number of cells, such as cells 410A 0 , 410A
  • Column 412A represents an element 3.
  • Column 412A includes a number of cells, such as cells 412A 0 , 412A ⁇ , and 412A 2 .
  • Column 414A represents an element 4.
  • Column 414A includes a number of cells, such as cells 414A 0 , 414A, , and 414A 2 .
  • Figure 4B illustrates a network 400B in a ring topology that has a desired relationship between each element in the network 400B.
  • the network 400B includes a first ring.
  • the first ring includes an interface 408B 0 that is coupled to an interface 410B i .
  • the coupling relationship between the interface 408B 0 and the interface 410B ⁇ is represented by a line 402B 0 .
  • the line 402Bo has an arrowhead illustrating the direction in which packets flow in the first ring of the network 400B.
  • the first ring includes an interface 412B 0 that is coupled to the interface 410B
  • the first ring includes an interface 414B] that is coupled to the interface 412B 0 through the line 402B 2 .
  • the first ring includes a relationship between the interface 414B
  • the network 400B includes a second ring.
  • the second ring includes an interface
  • the second ring includes an interface 412B] that is coupled to the interface 414Bo through the line 402B 5 .
  • the second ring includes an interface 410B 0 that is coupled to the interface 412B ⁇ through the line 402B 6 .
  • the first ring includes a relationship between the interface 410B 0 and the interface 408B) through the line 402B 7 .
  • Figure 4C illustrates a network 400C in a ring topology that has at least one undesired relationship between two elements.
  • the network 400C includes elements similar to Figure 4B. For clarity purposes, the discussion of similar elements as presented above is incorporated here in full.
  • the first undesired relationship includes the coupling between the interface 4 IOC, and 408C ⁇ through the line 402C 7 .
  • the second undesired relationship includes the coupling between the interface 408C] and 4 IOC, through the line 402C 0 .
  • the third undesired relationship includes the coupling between the interface 408C 0 and 414C 0 through the line 402C 4 .
  • the user can use the tabular diagram 400A or the pictorial diagrams 400B and 400C to determine if an undesired coupling exists between at least two elements on the network.
  • the tabular diagram 400A and the pictorial diagrams 400B and 400C also allow the user to determine the location of the undesired coupling.
  • the embodiments of the present invention allow an installer in the field to determine whether there has been an incorrect coupling between two network elements.
  • the embodiments of the present invention pinpoint the position of the problem, and permit the installer to ameliorate the incorrect coupling.
  • the embodiments of the present invention allow such a problem to be corrected early in the installation of a network given that attempts to fix the network after installation may be expensive.
  • the hereinbefore discussion of the embodiments of the present invention focus on a ring topology, but a particular network topology does not limit the embodiments of the present invention, and other types of topology may benefit from the embodiments of the present invention.

Abstract

L'invention concerne des systèmes, des structures et des procédés améliorant la configuration d'un réseau. Etant donné que les pièces de matériel d'un réseau peuvent se situer sur une grande surface dans diverses installations ou peuvent être enterrées dans le sous-sol, il est difficile à un installateur de déterminer, pendant le processus d'installation, s'il y a eu un couplage indésirable entre au moins deux éléments sur le réseau. Les modes de réalisation de la présente invention permettent à un installateur de vérifier sur le terrain si un tel couplage indésirable existe, et permettent à l'installateur de résoudre le problème. Les modes de réalisation de la présente invention sondent le réseau pour former une voie du réseau et présentent la voie à l'installateur. Si la voie est une voie indésirable, alors le réseau comprend au moins un couplage indésirable entre au moins deux éléments. La voie peut être à nouveau analysée afin de déterminer des portions indésirables de la voie. Chaque portion indésirable de la voie désigne les deux éléments connectés incorrectement l'un à l'autre.
PCT/IB2001/000435 2000-03-23 2001-03-21 Procedes d'identification de connexions dans un reseau WO2001071975A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2001244430A AU2001244430A1 (en) 2000-03-23 2001-03-21 Methods for identifying connections in a network
IL15160601A IL151606A0 (en) 2000-03-23 2001-03-21 Methods for identifying connections in a network

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US53353300A 2000-03-23 2000-03-23
US09/533,533 2000-03-23

Publications (3)

Publication Number Publication Date
WO2001071975A2 true WO2001071975A2 (fr) 2001-09-27
WO2001071975A3 WO2001071975A3 (fr) 2002-04-18
WO2001071975A9 WO2001071975A9 (fr) 2003-09-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2001/000435 WO2001071975A2 (fr) 2000-03-23 2001-03-21 Procedes d'identification de connexions dans un reseau

Country Status (3)

Country Link
AU (1) AU2001244430A1 (fr)
IL (1) IL151606A0 (fr)
WO (1) WO2001071975A2 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5481674A (en) * 1994-06-20 1996-01-02 Mahavadi; Manohar R. Method and apparatus mapping the physical topology of EDDI networks
EP0739110A2 (fr) * 1995-04-19 1996-10-23 Hewlett-Packard Company Méthode de détermination de topologie d'un réseau
GB2314723A (en) * 1996-06-24 1998-01-07 Nemesys Research Limited ATM network
US5826038A (en) * 1994-09-01 1998-10-20 Fujitsu Limited Communication network configuration detecting method using frame transmission
WO1999057853A1 (fr) * 1998-05-02 1999-11-11 Giganet Networks, Inc. Agencement et procede distribues permettant de commander la commutation et la connexion dans un reseau de communication numerique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5481674A (en) * 1994-06-20 1996-01-02 Mahavadi; Manohar R. Method and apparatus mapping the physical topology of EDDI networks
US5826038A (en) * 1994-09-01 1998-10-20 Fujitsu Limited Communication network configuration detecting method using frame transmission
EP0739110A2 (fr) * 1995-04-19 1996-10-23 Hewlett-Packard Company Méthode de détermination de topologie d'un réseau
GB2314723A (en) * 1996-06-24 1998-01-07 Nemesys Research Limited ATM network
WO1999057853A1 (fr) * 1998-05-02 1999-11-11 Giganet Networks, Inc. Agencement et procede distribues permettant de commander la commutation et la connexion dans un reseau de communication numerique

Also Published As

Publication number Publication date
AU2001244430A1 (en) 2001-10-03
WO2001071975A3 (fr) 2002-04-18
WO2001071975A9 (fr) 2003-09-12
IL151606A0 (en) 2003-04-10

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