CN1419763A - Non-invasive remote monitoring and reporting of digital communications systems - Google Patents
Non-invasive remote monitoring and reporting of digital communications systems Download PDFInfo
- Publication number
- CN1419763A CN1419763A CN01807106.6A CN01807106A CN1419763A CN 1419763 A CN1419763 A CN 1419763A CN 01807106 A CN01807106 A CN 01807106A CN 1419763 A CN1419763 A CN 1419763A
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- network
- monitor
- communication network
- communication
- communication path
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- 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
- H04L41/02—Standardisation; Integration
- H04L41/0213—Standardised network management protocols, e.g. simple network management protocol [SNMP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/24—Testing correct operation
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Maintenance And Management Of Digital Transmission (AREA)
- Telephonic Communication Services (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
A monitoring system for monitoring network stations or nodes for typical alert or maintenance situations, such as outages, in a digital communications network, such as a T1 circuit. A bridge can obtain performance and quality information about the nodes via a passive connection that taps into the digital communications network. A predetermined characteristic analyzer can collect performance and/or quality information output by the bridge. In response to this collected information, the predetermined characteristic analyzer can compare predetermined conditions to a threshold. In the event that the collected information exceeds or deviates from a threshold for a predetermined condition, the predetermined characteristic analyzer generates a trigger that represents a reportable event. This trigger is typically reported to a processor which, in turn, can automatically alert an individual or central monitoring station by forwarding a message regarding the reportable event via an alternate communications path, i.e., a communications path that is not a component of the existing communications network. A wireless transceiver can accept the reportable event message from the processor and transmit that message via the alternate communications path to the network management system. Significantly, this alternative communications path is not competitive with the capacity of the communications network being monitored by the network management system.
Description
The field of the invention
The present invention relates to the non-intruding of communication network, optimum supervision is used to detect at one or more nodes of network newspaper of dealing with emergencies and dangerous situations, and reports to the police to the remote response center by the signalling system different with the network that is monitored.
Background of the present invention
Be used for determining the Useful Information of digital communications network state, generally collect and storage by each position managed of network or node.General by agreement in the band, such as Simple Network Management Protocol (SNMP) and CMIP (CMIP), make Network Management Station can obtain this information.SNMP and CMIP state " SNMP; SNMPv2; andCMIP:The Practical Guide to Network-Management Standards " byWilliam Stallings in following document, published by Addison-Wesley Publishing Company, Reading, Mass.01857.
Be stored in by the information of management position and generally send to Network Management Station to wrap in the same communication path that just is being monitored.This use monitoring channel has three obvious defects from the communication that network node carries out network management information.At first, some communication paths are lost, and then state information can not be sent to Network Management Station.Secondly, expended this communication path part capacity by the communication path send state information that is being monitored.The 3rd, the contention of same communication path is usually slowed to unacceptable delay level to desirable status report.The serious restriction of these characteristics of prior art network monitoring system is so that reduced the value of user's monitoring network of this system.
U.S.Patent No.5,648,966 have described the existing network path as the effect that is used for transmitting to monitoring station the report path of monitor message.Yet this patent is not talked about use by one or more report paths of not realizing with the communication path of the communication path competition that is just being monitored by network management system.This patent is not said yet and is adopted and is convenient to fast the low-cost wireless report path of installing.
With regard to the limitation of prior art, be necessary to adopt the communication path that substitutes of not competing capacity with the network service path that monitors by network management system.Also be necessary to adopt alternative wireless communications pathway, cost-effective to allow, flexible and quick allotting network surveillance.
General introduction of the present invention
The present invention can automatically monitor the state of digital communications network, is used for to remote response center report quality problem.This supervisory work is based on the communication path that substitutes that use is not an existing communication network part, and with non-intruding, benign pathways is finished by monitoring network node or the station.Thereby, the influence that the capacity of the communication network that just is being monitored can not come under observation action or report.In addition, do not have the communication path of competition by using the alternative communication network capacity with being monitored by network management system, such as wireless communication link, the present invention can realize this warning report in mode fast.
The invention provides a kind of surveillance, be used for for such as typical warnings or maintenance condition such as shutdown, monitoring website or node such as the such digital communications network of T1 line.A kind of bridge can be dynamically connected by the quilt that is linked into digital communications network and obtain about the performance of node and the information of quality.A kind of predetermined properties analyzer can be collected performance and/or quality information by this bridge.Respond the information of this collection, the predetermined properties analyzer can compare predetermined condition and threshold value.Under the information of collecting surpasses situation for the threshold value of predetermined condition, but the predetermined characteristics analyzer produces the triggering signal of expression reporting event.This triggering signal generally is reported to processor, and this processor then communication path by substituting promptly be not the communication path of existing communications network components, but transmit the message about reporting event, can from trend independent or the center monitoring station report to the police.But wireless transceiver can receive reporting event from processor, and transmits this message by the communication path that substitutes to network management system.Importantly, this communication path that substitutes is not competed with the communication network capacity that is monitored by network management system.
The present invention also provides non-intruding to monitor the method for digital communications network, is used for detected state information, such as maintenance event that takes place in network node or problem.This state information can report to the remote response center by monitor by just being different from the communication path of the communication network that is monitored by the remote response center, is also referred to as network management system.Monitor can be by " accesss " network the bridge collection of communication path about the information of one or more nodes of communication network.The information that response detects collection departs from one or more predetermined properties, and monitor can produce report message, is used for the communication path by substituting, and generally is that wireless communications pathway transmits.This communication path that substitutes is different from the communication network that is monitored by the remote response center or separates with it.
Monitor of the present invention generally comprises a monitoring arrangement, is used for the node of monitor communication path such as T1 line, and is used for responding at the communication path that is monitored and detects Warning Event and generation incident or alert message.For example, monitoring arrangement can provide the continuous non-intruding of T1 line quality is monitored.The digital cellular communications machine, by with the irrelevant two-way wireless communication link of the communication path that is monitored, can be used for to the network manager control centre, or other relevant departments transmit event message.
For one aspect of the present invention, monitor does not need the field level programming, because programmed logic can be transferred to monitor by wireless communication link from remote control center with the form of order and data.In master unit was realized, monitoring arrangement can monitor the operation of a plurality of T1 line, and produced report message to center digital cellular communications machine, was used for carrying out follow-up transmission by the wireless communications pathway that substitutes.
For an aspect of of the present present invention, surveillance can be used as U.S.PatentNo.5, and 526,401,5,546,444,5,794,144, and 5, the wireless communication technology of the Cellemetry Data Service that describes in 873,043, but each reporting event transmitted by the extra control channel of cellular radio and telephone as data-message.The patent documentation of contrast is whole in conjunction with as a means of contrast in this specification.Those skilled in the art can understand, and scope of the present invention comprises other wireless communication system and is used as the communication path that substitutes in the digital communications network that is monitored.
With regard to the above, by reading following detailed explanation and, can have these and other characteristic of the present invention and advantage and to understand more clearly and to understand with reference to accompanying drawing and claim.
Brief description of drawings
Fig. 1 is a block diagram, expression according to one embodiment of present invention, the exemplary PASSIVE SURVEILLANCE unit that physically combines with the communication network path that monitors by network management system.
Fig. 2 is a block diagram, and expression is configured in the PASSIVE SURVEILLANCE unit of monitor communication node in the digital communications network according to one embodiment of the invention.
This in conjunction with and constitute the accompanying drawing of a specification part, exemplary embodiment of the present invention is shown, and with the above total description that provides and following detailed description together, be used for explaining principle of the present invention.
Detailed description of illustrative embodiments
Referring now to the accompanying drawing group, identical label is represented components identical among wherein several figure, Fig. 1 provides the diagram of an exemplary PASSIVE SURVEILLANCE unit block, and this unit physically is combined as a whole with the communication network path that is monitored digital communications network by network management system.Now turn to Fig. 1, monitor 1 comprises bridge 2, predetermined characteristics analyzer 3, and discrete event interface 6.Monitor 1 can also comprise a processor 4, is combined in the monitor assemblies or on the network to be installed in outside this assembly, is used to control the operation of monitor 1.
Bridge 2 provides the front end of high impedance, variable gain, is used for connecting or " access " leads to the communication path of the communication network of monitor 1.Bridge can comprise that variable gain amplifier is to compensate the loss of importing into that placing modules causes on the communication path that is monitored.Feasible can the ignoring of bridge 2 high-impedance behavior is monitored the electric current that communication path consumes.Bridge 2 is formed by interface 7 and 8 to being connected physically of digital communications path that is monitored by monitor 1.In an exemplary embodiment, interface 7 and 8 adopts industrial standard RJ48C connector to be implemented to being connected of bridge 2.
Digital communications path is commonly referred to as " four wire circuits ", supports the two-way communication of being undertaken by transmission path and reception path.Each path generally comprise one " to " lead, thereby " four lines " circuit by name.Interface 7 can be connected to the reception path of communication network, and interface 8 can be connected to the transmission path of network simultaneously.The use high impedance connects, and bridge 2 can extract the information characteristic that presents at interface 7 and 8 from communication network, and can not impact or disturb the proper communication operation.
The output of bridge 2 is sent to predetermined characteristics analyzer 3, and this analyzer preferably monitors this output stream continuously to predetermined characteristics.Typical predetermined properties comprises the transmission of interface or receiver side either party's " step-out ", " dislocation rate " or " loss of signal ".Additional characteristic can be provided by discrete event interface 6 alternatively, and this interface can, be distorted (tamper) switch to selecteed incident such as junction closure, and temperature threshold and limit switch pass to interface of monitor 9 and control interface 10.With reference to the more detailed explanation of Fig. 2, interface 7,8 and 9 can be looked at as the single interface of monitor 1, the interface 101 shown in Fig. 2 jointly as following.In a word, the information of expression predetermined properties can offer predetermined properties analyzer 3 by the output of bridge 2 or discrete event interface 6.
But in order to determine reporting event, predetermined properties and threshold value that predetermined characteristics analyzer 3 can relatively be exported by bridge 2 or discrete event interface 6.Depart from predetermined properties under the situation of threshold value, but predetermined properties analyzer 6 is communication network indication reporting event.Detecting can report characteristic the time, predetermined properties analyzer 3 is by the link notification processor 4 of extension between monitor 1 and the processor 4.Processor 4 then the message and give wireless transceiver 5 with this forwards of can preparing a report so that to the remote response center of digital communication system, are also referred to as network management system and send.
Monitor 1 can use the No.5 as U.S.Patent, 526,401,5,546,444,5,794,144, and the function of the Cellemetry Data Service that describes in 5,873,043, but each reporting event is transmitted by cellular radio telephone (CMR) system as data-message.The data message system of describing in the United States Patent (USP) of these contrasts comprises the data report device, at least one removable main dispatching centre (MSC), and directly connect or the non-data gathering system that is directly connected to MSC or signal transfer point (STP).For surveillance application of the present invention, wireless transceiver 5 is realized by one of data report device of describing in the contrast patent.When the data report device at first identify own or " registration " so that when operating with MSC, the data report device can transmit the data-message that comprise selected data by the cellular network control channel of CMR system.In addition, the data report device can pass through the cellular network control channel, with formatted and represent the data that the data-message of " call source " signal send to be selected.MSC then can send data-message by communication link to data gathering system.Like this, data message system is used for data communication between center and one or more remote scene by using the cellular network control channel, has utilized the benefit on the basis that cellular communication device installed.
Those skilled in the art can understand, and scope of the present invention comprises other wireless communication system, be used as the communication path that substitutes in the digital communications network that is monitored.For example, the Zhuan Yong wireless communication system based on the unit can be used for transmitting event message between monitor 1 and remote response center.Similarly, the double-direction radio paging system can be used for supporting event message from monitor 1 to the remote response central transmission.The SMS ability that another kind of again wireless communication medium is many cellular mobile radios telephone system.
Though monitor 1 comprises the several assemblies that are expressed as the physical component that separates in Fig. 1, but be understood that, monitor also can be configured to the physical location of independent homogeneity, its some or all functions with software, or simulated by the combination of electronic installation and software.
Those skilled in the art can also understand, and scope of the present invention can comprise the modular assembly of monitor 1 parts.For the embodiment of this modular member, the combination of bridge 2, predetermined properties analyzer 3 and discrete event interface 6 can be bonded in the single assembly 12.This modular combination method make processor 4 can with a plurality of monitor 1 interfaces, like this, use single-processor to control in the installation of implementation of a plurality of monitors based on master unit at some, can reduce cost.For this master unit implementation of surveillance, communication link 11 can be connected to other monitor 1 to processor.
Now referring to Fig. 2, change or the operating environment of a plurality of monitors generally comprises in the communication system, in all digital-telecommunication systems if any one or more communication paths 102, a plurality of nodes 103 and 104.Monitor 1 can be connected to individual node by connection, such as network node 103, or " n " individual node.Connecting 101 generally is connected between the interface 7,8 and 9 of the monitor 1 shown in network node and Fig. 1.But response detects for the reporting event that is monitored node, and monitor 1 can produce event message, for transmitting by wireless communications pathway 105 and wireless network 106.The combination of wireless communications pathway 105 and wireless network 106 is to separate with the communication path 102 that is monitored and independently, the latter generally realizes by the T1 circuit.Wireless network 106 can be transmitted this event message to remote response center 108 by communication link 107.
Except detect and report predetermined characteristics incident, the present invention also provides a kind of mechanism, so that long-range and wirelessly the operating environment of the discrete control event operation guide of locality to monitor 1.The command messages that sends from remote response center 108 can be sent to monitor 1 by data link 107, wireless network 106 and Radio Link 105.The discrete event interface of Fig. 1 can be realized that this interface can be used for can be by any control of the closed activation of make and break contact by general switch closure interface.The order of being received by monitor 1 can be operated the relay contact in the discrete event interface 6, thereby changes the electric continuity between controlled device and the control interface 10.Like this, by discrete event interface 6 and control interface 10, can be implemented in the Long-distance Control of the controllable device of operating in the environment of monitor 1.
What should connect is, specific embodiment described here is disclosed by the mode of example, and under the scope and spirit that do not deviate from the claims collection, those skilled in the art can make other remodeling.
Claims (17)
1. a kind of method of non-intruding monitor communications network is used for giving a warning by the communication path that the substitutes detection predetermined characteristics different with the communication network that is monitored and to the remote response center, and this method may further comprise the steps:
Node acquired information from communication network;
If the predetermined properties of the information that obtains departs from threshold value, then produce event report; And
Transmit event report by the communication path that substitutes different with the communication network that just is being monitored.
2. the process of claim 1 wherein that alternative communication path comprises wireless network, and digital communications network comprises independently cable network separately.
3. the process of claim 1 wherein that the step of the node acquired information from communication network comprises that use high impedance, variable gain connect, so that the node of access communications network.
4. the process of claim 1 wherein that the step of the node acquired information from communication network comprises uses bridge to connect communication network, and this bridge comprises variable gain amplifier, with compensation since the insertion that the placement of bridge in communication network causes lose.
5. the method for claim 4, wherein the step of the node acquired information from communication network also comprises to the predetermined characteristics analyzer and transmits information by bridge output, so that the predetermined characteristics of identification presentation of events.
6. the method for claim 4, the step that wherein produces event report also comprises:
Use the predetermined properties analyzer that is connected with bridge to compare predetermined characteristics and threshold value; And
If predetermined properties departs from threshold value, then
The identification incident, and
Use the processor that is connected with the predetermined properties analyzer to prepare to comprise the event report of incident.
7. the process of claim 1 wherein that the step that produces event report comprises:
Compare predetermined characteristics and threshold value;
If predetermined characteristics departs from threshold value, then
The identification incident, and
Preparation comprises the report of incident.
8. the process of claim 1 wherein and comprise the step that transmits event report by the communication path that substitutes to the remote response center that is connected with alternative communication path and transmit the report message that comprises event report.
9. a computer-readable medium has the computer executable instructions that is used for step described in the enforcement of rights requirement 1.
10. method by different with the communication network that the is monitored communication path non-intruding control controllable devices that substitute may further comprise the steps:
Use monitor from the communication network acquisition of information, if collected information predetermined characteristics departs from threshold value, then monitor can be operated so that transmit event report by this communication path that substitutes to the remote response center;
Transmit control signal by the communication path mind-set monitor from remote response that substitutes; And
Response is passed through the controllable device executive control operation at the monitor processing control signals.
11. the method for claim 10, wherein the communication path of Ti Daiing comprises wireless network, and communication network comprises separately and cable network independently.
12. the method for claim 11, wherein the step of processing control signals comprises control signal decoding is used for instruction to the discrete event interface output of monitor with generation, this discrete event interface response instruction and can operate with start-up control and operate.
13. the method for claim 12, wherein the discrete event interface comprises the switch closure interface, has controllable relay contact when receiving instruction.
14. the method for claim 10, wherein the step of executive control operation comprises the relay contact state at responsive control signal control monitor place, the electric continuity between relay contact control monitor and the controllable device.
15. a computer-readable medium has the computer executable instructions that is used for step described in the enforcement of rights requirement 10.
16. a monitor that is used for the non-intruding monitor communications network comprises:
Bridge is connected to communication network, can operate to be used for from the communication network acquisition of information;
The predetermined characteristics analyzer can be operated to detect by predetermined characteristics in the information of bridge output;
Processor is connected with the predetermined characteristics analyzer, if predetermined characteristics departs from threshold value, then can operate to produce event report; And
Transmitter is connected with processor, is used for sending event report by the communication path that substitutes different with communication network to the remote response center.
17. the system of claim 16, wherein monitor also comprises
The discrete event interface is connected with the scheduled communication analyzer, can operate to be used for by the communication path that substitutes from the communication network acquisition of information, and receive instruction from the remote response center, and respond this instruction to the communication network executive control operation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US51305600A | 2000-02-24 | 2000-02-24 | |
| US09/513,056 | 2000-02-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1419763A true CN1419763A (en) | 2003-05-21 |
Family
ID=24041715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01807106.6A Pending CN1419763A (en) | 2000-02-24 | 2001-01-30 | Non-invasive remote monitoring and reporting of digital communications systems |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1258105A2 (en) |
| JP (1) | JP2003524997A (en) |
| CN (1) | CN1419763A (en) |
| AU (1) | AU2001233127A1 (en) |
| BR (1) | BR0108660A (en) |
| CA (1) | CA2401061A1 (en) |
| WO (1) | WO2001063825A2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100366119C (en) * | 2005-08-31 | 2008-01-30 | 张科任 | Mobile communication network remote detecting system and its remote detecting method |
| CN1691581B (en) * | 2004-04-26 | 2010-04-28 | 彭诗力 | Multi-pattern matching algorithm based on characteristic value |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7783508B2 (en) | 1999-09-20 | 2010-08-24 | Numerex Corp. | Method and system for refining vending operations based on wireless data |
| US7245928B2 (en) | 2000-10-27 | 2007-07-17 | Cellemetry, Llc | Method and system for improved short message services |
| US7680085B2 (en) * | 2001-07-24 | 2010-03-16 | Symbol Technologies, Inc. | Out-of-band management and traffic monitoring for wireless access points |
| US7453900B2 (en) | 2003-03-05 | 2008-11-18 | Cisco Technology, Inc. | System and method for monitoring noise associated with a communication link |
| GB0306237D0 (en) * | 2003-03-19 | 2003-04-23 | Marconi Comm Optical Networks | Notifications in a telecommunications network |
| US7286516B2 (en) * | 2003-09-12 | 2007-10-23 | Tekelec | Methods and systems for wireless local area network (WLAN)-based signaling network monitoring |
| US7323970B1 (en) | 2004-01-21 | 2008-01-29 | Numerex Corporation | Method and system for remote interaction with a vehicle via wireless communication |
| JP4616020B2 (en) | 2005-01-27 | 2011-01-19 | 富士通株式会社 | Network monitoring program and network system |
| AU2006215969B2 (en) * | 2005-02-15 | 2011-05-19 | Licania Gmbh | Method and system for subterranean wireless data transmission between at least one mobile station and a fixed network by means of a radio network |
| US7680471B2 (en) | 2006-05-17 | 2010-03-16 | Numerex Corp. | System and method for prolonging wireless data product's life |
| EP2118858A4 (en) | 2007-02-06 | 2010-03-31 | Numerex Corp | Service escrowed transportable wireless event reporting system |
| WO2012018343A1 (en) * | 2010-08-06 | 2012-02-09 | Empire Technology Development Llc | Communication network monitoring |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0496509A (en) * | 1990-08-13 | 1992-03-27 | Nec Corp | Variable gain amplifier |
| FI97839C (en) * | 1994-05-25 | 1997-02-25 | Nokia Telecommunications Oy | A method of monitoring the fitness of a connection wiring network, as well as a monitoring device |
| JPH0897818A (en) * | 1994-09-21 | 1996-04-12 | Nec Corp | Wide area network management system |
| US6128285A (en) * | 1997-01-24 | 2000-10-03 | At&T Corp. | Monitoring of a packet telephony device via a control device |
| NO983158L (en) * | 1998-07-08 | 2000-01-10 | Safetel As | Device for creating alternative telecommunications path |
-
2001
- 2001-01-30 JP JP2001562897A patent/JP2003524997A/en active Pending
- 2001-01-30 AU AU2001233127A patent/AU2001233127A1/en not_active Abandoned
- 2001-01-30 CA CA002401061A patent/CA2401061A1/en not_active Abandoned
- 2001-01-30 CN CN01807106.6A patent/CN1419763A/en active Pending
- 2001-01-30 BR BR0108660-0A patent/BR0108660A/en not_active Application Discontinuation
- 2001-01-30 EP EP01905225A patent/EP1258105A2/en not_active Withdrawn
- 2001-01-30 WO PCT/US2001/002998 patent/WO2001063825A2/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1691581B (en) * | 2004-04-26 | 2010-04-28 | 彭诗力 | Multi-pattern matching algorithm based on characteristic value |
| CN100366119C (en) * | 2005-08-31 | 2008-01-30 | 张科任 | Mobile communication network remote detecting system and its remote detecting method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003524997A (en) | 2003-08-19 |
| EP1258105A2 (en) | 2002-11-20 |
| WO2001063825A2 (en) | 2001-08-30 |
| BR0108660A (en) | 2003-01-28 |
| CA2401061A1 (en) | 2001-08-30 |
| WO2001063825A3 (en) | 2002-03-28 |
| AU2001233127A1 (en) | 2001-09-03 |
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