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WO2007090891A1 - Systeme de communication par tension d'alimentation - Google Patents

Systeme de communication par tension d'alimentation Download PDF

Info

Publication number
WO2007090891A1
WO2007090891A1 PCT/EP2007/051283 EP2007051283W WO2007090891A1 WO 2007090891 A1 WO2007090891 A1 WO 2007090891A1 EP 2007051283 W EP2007051283 W EP 2007051283W WO 2007090891 A1 WO2007090891 A1 WO 2007090891A1
Authority
WO
WIPO (PCT)
Prior art keywords
network
modems
quality index
surveillance
quality
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP2007/051283
Other languages
English (en)
Inventor
Raoul Monnier
Franck Aumont
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thomson Licensing SAS
Original Assignee
Thomson Licensing SAS
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 Thomson Licensing SAS filed Critical Thomson Licensing SAS
Publication of WO2007090891A1 publication Critical patent/WO2007090891A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/50—Testing arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5495—Systems for power line communications having measurements and testing channel
    • 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
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0659—Management of faults, events, alarms or notifications using network fault recovery by isolating or reconfiguring faulty entities
    • 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
    • H04L41/50—Network service management, e.g. ensuring proper service fulfilment according to agreements
    • H04L41/5003—Managing SLA; Interaction between SLA and QoS
    • H04L41/5009—Determining service level performance parameters or violations of service level contracts, e.g. violations of agreed response time or mean time between failures [MTBF]
    • 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
    • H04L41/50—Network service management, e.g. ensuring proper service fulfilment according to agreements
    • H04L41/5003—Managing SLA; Interaction between SLA and QoS
    • H04L41/5019—Ensuring fulfilment of SLA

Definitions

  • the invention relates to a powerline communication system and more particularly to a method of surveillance of a network of modems on a powerline carrier .
  • the powerline communication technology called PLC (powerline communication) , which consists in superposing a high-frequency signal, for example 1- 30 MHz, on a low-frequency voltage (50 or 60 Hz) , makes it possible to use the conventional electrical power wiring instead of another network, for example an Ethernet network, to transport digital data.
  • PLC powerline communication
  • the quality of the signal is determined with the aid of a particular quality measurement modem comprising its own measurement device, that can be connected to the network to be tested and that comprises a built-in signal quality indicator.
  • This modem can be connected to one of the power outlets of the network.
  • the quality measurement is based on one-way metric measurements, that do not make it possible to deduce information on the origin of the interference.
  • the network can be tested only with the addition of this additional measurement modem.
  • the invention aims to remedy these disadvantages and proposes a test method that can be adapted to any type of modem connected to the network and is based on bidirectional metric measurements, irrespective of the PLC technology used on this network.
  • the invention is a method of network surveillance for a powerline carrier communication system applicable on any one of the network modems. It comprises the steps: of identifying the modems present in the network via a scanning procedure; of measuring the bidirectional quality parameters between the identified modems; - of deducing a quality index with reference to the applications envisaged on the network; and of transmitting an information message depending on this quality index.
  • the invention has the advantage of testing the quality of service necessary for the desired applications without adding an additional test modem, the software implementing the steps described above running on one of the items of equipment connected to the PLC modems.
  • the quality parameter measurements correspond to the bidirectional measurements of available bit rates.
  • the surveillance method comprises the step, following the identification of an inadequate quality index, of locating an interfering element by detecting an asymmetry of the bidirectional measurements between two modems .
  • the surveillance method comprises the step of identifying an interfering element by comparing the effective degradation of the bit rates with a database stored in a terminal.
  • the steps are reiterated regularly during the transmission process in order to detect a degradation of transmission quality and help the user to remedy this degradation.
  • the invention simplifies troubleshooting because, in most cases, it allows the problem to be solved by the user, which avoids the use of the troubleshooting service (hotline) or the unnecessary return of products catalogued as defective. It is therefore a precious aid for establishing a diagnosis.
  • Figure 1 represents the diagram of a network installation serving as a support to the method according to the invention for a powerline communication system.
  • - Figure 2 represents an example of a flow chart used by a method produced according to the invention.
  • Figure 1 represents an example of a domestic network using powerline communication technology. It is connected to the mains 1 via an electric meter 3.
  • This electric network comprises various branches A, B, C and D, connected to different power outlets 11 to i4 which can be plugged modems 12 connected to terminals 13 such as for example digital decoders, computers, laptops (PC) or IP (for Internet protocol) telephones. Most of the terminals comprise screens or are connected to screens.
  • terminals 13 such as for example digital decoders, computers, laptops (PC) or IP (for Internet protocol) telephones.
  • Most of the terminals comprise screens or are connected to screens.
  • the modem 12 is built into the terminal 13.
  • the method according to the invention can be executed by one of the terminals 13 connected to a modem.
  • the method begins with a step 101 of scanning the various modems 12 connected to terminals 13.
  • the invention is therefore a method whose first step consists in scanning and registering the various modems 12 via a particular protocol, for example the ICMP (for Internet Control Message Protocol) protocol, at the initiative of one of the terminals 13.
  • ICMP Internet Control Message Protocol
  • a bidirectional measurement of the bit rate is carried out between all the modems registered during the first step. It involves measuring the bit rate also called the useful bit rate, for example, a UDP (for User Datagram Protocol) or TCP (Transport Control Protocol) bit rate. This measurement can be carried out for example by sending a file from one terminal 13 to another and measuring the speed of transfer of the data of this file. This step will then be repeated for the various registered modems.
  • the bit rate also called the useful bit rate, for example, a UDP (for User Datagram Protocol) or TCP (Transport Control Protocol) bit rate.
  • UDP User Datagram Protocol
  • TCP Transport Control Protocol
  • bit rate margin available relative to the bit rate used on all the links established between the various modems .
  • a check is made to ascertain that the measured bit rates make it possible to run the envisaged applications on this network with a certain margin compatible with the desired quality of service and, during the next step 103, a quality index is deduced relative to the desired quality of this service.
  • the user is then informed of the network quality according to the value of this index.
  • a bargraph is used to indicate the network quality level to the user on a screen connected to the terminal 13.
  • the network may operate. Regular surveillance based on this bit rate measurement principle will then be initiated during the next step 105. It involves regularly sending, without interfering with the payload data stream, a test data stream making it possible to evaluate the available bit rate margin relative to the bit rate used on all the links established between the various modems.
  • the information on the bidirectional bit rates measured will make it possible to determine the type of interfering element and locate it.
  • the type of interfering element will be determined during a step 107 for comparing the information obtained via the bit rate measurements and information relating to the interfering elements registered in a memory. Specifically, a list of the different interfering elements associated with different values of bit rate loss is stored in a memory and forms a reference database 106 which will make it possible to identify this interfering element. It may, for example, be a bad device connection to the network or be the use of a multiple-outlet unit or the proximity of a mobile telephone charger. The list of interfering elements is derived from site tests and is not finite. It may be supplemented gradually as interference is encountered.
  • Each registered interfering element is therefore associated with an average data bit rate loss value or minimum and maximum bit rate loss values.
  • Other information available inside the modems may also be used either in isolation or in combination with these bit rate measurements to form this database 106 and subsequently establish the diagnosis of the PLC network. This information may for example be a frequency response or a signal-to-noise ratio or a transmission power or an error check or any other parameter sensitive to local interference.
  • the interfering element is located during a step 108 by comparing the asymmetry of the data bit rates between the modems connected to the network. For example, on a network that comprises only the terminals A and B, if the method according to the invention is executed by the terminal A and the bidirectional bit rate between the terminals A and B is measured, an asymmetry of the measurements of the incoming and outgoing bit rates of A will make it possible to indicate whether the interfering element is situated closer to A or to B. If the bit rate from A to B is degraded relative to the bit rate from B to A, it is possible to conclude therefrom that the modem B has, in receive mode, a bad quality signal-to-noise level and that the interfering element is therefore close to the modem B. It is therefore thanks to the asymmetry of these bit rates that it is then possible to indicate to the user during the step 109 the probable position of the interfering element.
  • the invention has not only a detection role but will also have an important role of providing information and helping to isolate the interfering element or the faulty element. This may be, for example, the use of a filter isolating the interfering element from the rest of the PLC network. It is not limited to the example previously described but relates to maintenance on the PLC network or a bidirectional parameter measurement makes it possible to determine and locate an interfering element.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)

Abstract

Cette invention concerne un procédé de surveillance d'un réseau pour un système de communication par tension d'alimentation, qui peut s'appliquer à l'un quelconque des terminaux raccordés à un modem constituant le réseau. A la suite de la mesure bidirectionnelle des débits binaires, le procédé consiste à en déduire un indice de qualité du réseau et à identifier et localiser l'élément interférant si l'indice de qualité est jugé inapproprié.
PCT/EP2007/051283 2006-02-10 2007-02-09 Systeme de communication par tension d'alimentation Ceased WO2007090891A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0650493 2006-02-10
FR0650493 2006-02-10

Publications (1)

Publication Number Publication Date
WO2007090891A1 true WO2007090891A1 (fr) 2007-08-16

Family

ID=36283808

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/051283 Ceased WO2007090891A1 (fr) 2006-02-10 2007-02-09 Systeme de communication par tension d'alimentation

Country Status (1)

Country Link
WO (1) WO2007090891A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120093240A1 (en) * 2010-01-18 2012-04-19 Atheros Communications, Inc. Interference detection in a powerline communication network
US8675651B2 (en) 2010-01-18 2014-03-18 Qualcomm Incorporated Coexistence mechanism for non-compatible powerline communication devices
EP2712096A1 (fr) * 2012-09-25 2014-03-26 Alcatel Lucent Procédé et système pour détecter une paire torsadée perturbatrice dans un réseau PLC
WO2014155987A1 (fr) * 2013-03-27 2014-10-02 パナソニック株式会社 Système de communication et appareil de communication
EP2819269A1 (fr) * 2013-06-28 2014-12-31 Alcatel Lucent Procédé et système pour localiser une paire torsadée perturbatrice dans un réseau PLC

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6404822B1 (en) * 1999-05-14 2002-06-11 At&T Corp Control of broadband voice and data communication over a low quality noisy transmission media
US20030122552A1 (en) * 2001-12-28 2003-07-03 Litwin Louis Robert Signal quality indicator on a powerline-modem
EP1530313A1 (fr) * 2003-11-05 2005-05-11 Sony International (Europe) GmbH Procédé pour l'adaptation d'un modem PLC ou DSL utilisant des données de qualité

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6404822B1 (en) * 1999-05-14 2002-06-11 At&T Corp Control of broadband voice and data communication over a low quality noisy transmission media
US20030122552A1 (en) * 2001-12-28 2003-07-03 Litwin Louis Robert Signal quality indicator on a powerline-modem
EP1530313A1 (fr) * 2003-11-05 2005-05-11 Sony International (Europe) GmbH Procédé pour l'adaptation d'un modem PLC ou DSL utilisant des données de qualité

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120093240A1 (en) * 2010-01-18 2012-04-19 Atheros Communications, Inc. Interference detection in a powerline communication network
US8675651B2 (en) 2010-01-18 2014-03-18 Qualcomm Incorporated Coexistence mechanism for non-compatible powerline communication devices
WO2012099943A1 (fr) * 2011-01-18 2012-07-26 Qualcomm Atheros, Inc. Détection d'interférences dans un réseau courant porteur en ligne
EP2712096A1 (fr) * 2012-09-25 2014-03-26 Alcatel Lucent Procédé et système pour détecter une paire torsadée perturbatrice dans un réseau PLC
WO2014155987A1 (fr) * 2013-03-27 2014-10-02 パナソニック株式会社 Système de communication et appareil de communication
EP2819269A1 (fr) * 2013-06-28 2014-12-31 Alcatel Lucent Procédé et système pour localiser une paire torsadée perturbatrice dans un réseau PLC
WO2014207090A1 (fr) * 2013-06-28 2014-12-31 Alcatel Lucent Procédé et système pour localiser un perturbateur dans un réseau plc

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