WO2012122759A1 - Procédé et système de surveillance de fautes de temps - Google Patents

Procédé et système de surveillance de fautes de temps Download PDF

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Publication number
WO2012122759A1
WO2012122759A1 PCT/CN2011/076729 CN2011076729W WO2012122759A1 WO 2012122759 A1 WO2012122759 A1 WO 2012122759A1 CN 2011076729 W CN2011076729 W CN 2011076729W WO 2012122759 A1 WO2012122759 A1 WO 2012122759A1
Authority
WO
WIPO (PCT)
Prior art keywords
time
error
clockwise
reference point
counterclockwise
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/CN2011/076729
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English (en)
Chinese (zh)
Inventor
何力
李争齐
夏靓
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.)
ZTE Corp
Original Assignee
ZTE Corp
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
Priority claimed from CN201110059696.1A external-priority patent/CN102684933B/zh
Priority claimed from CN201110131600.8A external-priority patent/CN102790703B/zh
Application filed by ZTE Corp filed Critical ZTE Corp
Publication of WO2012122759A1 publication Critical patent/WO2012122759A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42—Loop networks
    • H04L12/437—Ring fault isolation or reconfiguration

Definitions

  • the present invention relates to communication or, in particular, to a time failure monitoring method and system. Background technique
  • the Precise Time Protocol (abbreviated as ⁇ ) specifies a method of network synchronization, which ensures the time synchronization of the slaver and the master by measuring the delay.
  • ⁇ The Precise Time Protocol
  • there are other interference factors such as equipment failures, defects, and line asymmetry
  • the faulty device can only be monitored one by one using a Global Position System (GPS) receiver.
  • GPS Global Position System
  • this method has low maintenance efficiency and high application cost.
  • the present invention has been made in view of the related art, using a GPS receiver to monitor a faulty device one by one, thereby providing a problem of low maintenance efficiency and high application cost.
  • the main object of the present invention is to provide a time fault monitoring method and system. To solve the above problems.
  • a time failure monitoring method is provided.
  • the time fault monitoring method according to the present invention comprises: measuring the clockwise time error and/or inverse of the monitored node in the ring network along the clockwise and/or counterclockwise direction of the ring network with respect to the time reference point. Time-of-day error; monitor time error based on clockwise time error and/or counterclockwise time error.
  • Measuring the clockwise time error of itself relative to the time reference point includes: measuring its own line delay time to the time reference point; measuring the transmission time of its own clockwise transmission of the message to the time reference point; calculating the time error equal to the transmission time minus the line delay Time.
  • the transmission time of measuring the clockwise transmission of the message to the time reference point includes: recording the transmission time stamp of the message sent by itself clockwise; determining the reception timestamp of the message received by the time reference point; calculating the transmission time equal to the reception timestamp indication The time minus the time indicated by the timestamp.
  • Determining the timestamp of receiving the message by the time reference point comprises: receiving a response message from the time reference point, wherein the response message includes a receiving timestamp; and from the response message, extracting the receiving timestamp.
  • the method further includes: extracting a correction time from the response message; calculating a time equal to the time of receiving the timestamp indication minus the time of the transmission timestamp indication, and further reducing the correction time .
  • the monitoring time fault includes: determining whether the clockwise time error is greater than a unilateral alarm threshold of a predetermined clockwise time error, and/or determining a counterclockwise time Whether the error is greater than a unilateral alarm threshold of a preset counterclockwise time error; if the determination is yes, it is determined that there is a time failure in the clockwise direction and/or the counterclockwise direction.
  • the method further includes: determining a node time reference point among the plurality of nodes in the ring network, before measuring the time-duration 40-time error and/or the inverse-time 40-time error of the time reference point; Determining other nodes of the plurality of nodes other than the time reference point as the monitored nodes; setting each of the monitored nodes to perform a measurement of the clockwise time error of the measurement itself relative to the time reference point and/or Or counterclockwise time error operation.
  • the method further includes: 4: determining the time of each monitored node according to the monitoring result of the monitoring time fault of each monitored node Confidence; determines the time synchronization reliability of the ring network based on the confidence of the time of each monitored node.
  • the time fault monitoring system includes a monitored node and a time reference point, wherein the monitored node includes: a measuring module, configured to be along the 40th direction of the ring network and/or the 40th direction of the reverse time, Measurement The clockwise time error and/or the counterclockwise time error of the quantity itself relative to the time reference point; the monitoring module is set to monitor the time fault according to the timed 40 time error and/or the reverse time 40 time error.
  • the time error obtained from the clockwise direction and the counterclockwise direction is almost the same according to any node in the ring network, so that the time fault is monitored by monitoring the time error, thereby improving the maintenance efficiency and the application cost of the descending.
  • FIG. 1 is a schematic diagram of a ring network according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a time fault monitoring method according to an embodiment of the present invention
  • FIG. 3 is a time fault monitoring according to an embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a ring network in accordance with an embodiment of the present invention.
  • node 1 is a time reference point, and other nodes (2, 3, 4, 5, 6) are monitored nodes.
  • the present invention provides a time failure monitoring method.
  • FIG. 2 is a flowchart of a time failure monitoring method according to an embodiment of the present invention. As shown in FIG. 2, the following steps S202 to S204 are included.
  • Step S202 the monitored node in the ring network measures its clockwise 40-time error and/or reverse-time 40-time error with respect to the time reference point along the clockwise direction of the ring network and/or the reverse direction 40 directions.
  • step S204 the time fault is monitored according to the clockwise time error and/or the counterclockwise time error.
  • a GPS receiver is used to monitor a faulty device one by one, thereby maintaining low maintenance efficiency and high application cost.
  • considering any node in the ring network from clockwise direction and reverse time The time error acquired in the direction of the needle is approximately the same, so the time failure is monitored by monitoring the time error, thereby improving the maintenance efficiency and the application cost of the Lowering.
  • measuring the clockwise time error of the self relative to the time reference point comprises: measuring the line delay time of the self to the time reference point; measuring the transmission time of the clock transmission time to the time reference point; calculating the time error is equal to sending Time minus line delay time.
  • the preferred embodiment describes in detail how the monitored node measures its clockwise time error relative to the time reference point.
  • the clockwise time error of the monitored node measurement itself relative to the time reference point may be the same or In a similar manner, to avoid introducing unnecessary measurement errors in clockwise and counterclockwise measurements.
  • the preferred embodiment can measure the delay time of the line to the time reference point in a peer-to-peer manner, and the message sent by the monitored node can be a unicast P2P delay test message.
  • the non-monitoring node in the ring network can transparently process the unicast P2P delay test packet.
  • the measurement time of sending the message clockwise to the time reference point is: recording the transmission time stamp of the message sent by the clock itself; determining the time stamp of receiving the message by the time reference point; calculating the sending time is equal to the receiving time The time indicated by the stamp minus the time indicated by the time stamp.
  • the receiving the time stamp of receiving the message by the time reference point comprises: receiving a response from the time reference point, wherein the response includes a receiving time stamp; and extracting the receiving time stamp from the response message.
  • the clockwise and counterclockwise transmission timestamps of the monitored node records are t3_left and t3_right
  • the response time stamp included in the response message is t4_left and T4—right
  • the transmission time of the clockwise transmission message measured by the monitored node is t4—left — 13 — left
  • the transmission time of the counterclockwise transmission sent by the monitored node is t4—right - 13—right.
  • the method further includes: extracting the correction time from the response message; calculating the time when the transmission time is equal to the time of receiving the timestamp indication, the time of the transmission timestamp indication, and then Reduce the correction time.
  • the response time in the response message further includes the clockwise direction and the reverse time of the forty-direction correction time are correct_left and correct-right, and the measured node is measured.
  • the transmission time of the hour hand to send 4 ⁇ ⁇ is t4 — left - 13 — left — correct — left
  • the transmission time of the 4th time sent by the monitored node is 4 t 4 — right — t3 — right — correct — Right.
  • the clockwise time error and inverse in the present invention can be calculated by the following formula (1) and formula (2).
  • the monitoring time fault includes: judging clockwise Whether the time error is greater than a unilateral alarm threshold of a predetermined clockwise time error, and/or whether the counterclockwise time error is greater than a unilateral alarm threshold of a preset counterclockwise time error; Yes, it is determined that there is a time failure in the 40th direction in time and/or in the 40th direction in the reverse direction.
  • the time failure is usually a run-down fault, a time-calculated fault, and these faults will cause a one-sided alarm in either a clockwise direction or a counterclockwise direction. Therefore, in the preferred embodiment, it is first determined whether the monitored node exists in time or not. Unilateral time faults in ten directions or in reverse ten directions to ensure the efficiency and accuracy of time fault monitoring. Preferably, if the determination result is no, it is determined whether the difference between the clockwise time error and the counterclockwise time error is greater than a bilateral alarm threshold value of the preset time error, and the difference is greater than the bilateral alarm threshold value. Next, determine that there is a time failure in the clockwise direction and/or counterclockwise direction.
  • the time failure may also be an asymmetrical fault, and these faults may cause a bilateral alarm in the clockwise direction and the counterclockwise direction. Therefore, the preferred embodiment determines that there is no clockwise or counterclockwise direction of the monitored node. The side time fault, and then determine whether there is a bilateral time fault in the clockwise direction and the reverse direction of the monitored node, thereby ensuring the accuracy of the time fault monitoring.
  • the method before measuring a clockwise time error and/or a counterclockwise time error of the self relative to the time reference point, the method further comprises: determining a node time reference point among the plurality of nodes in the ring network; determining a node other than the time reference point among the plurality of nodes as the monitored node; setting each of the monitored nodes to perform a clockwise time error of the measurement itself relative to the time reference point and/or Counterclockwise time error operation.
  • the same monitoring mechanism can be established for all monitored nodes except the time reference point in the ring network to ensure uniformity of time fault monitoring, thereby ensuring efficiency and accuracy.
  • the method further comprises: determining, according to the monitoring result of the monitoring time fault of each monitored node, determining the monitored node The confidence of time; the reliability of the time synchronization of the ring network is determined according to the confidence of the time of each monitored node.
  • the monitored node is a platform 1588 node, and for a unicast P2P delay test message that is not the target of the monitored node, it can be forwarded according to the TC transparent transmission mode.
  • the implementation process of the embodiment of the present invention is described in detail below by taking the monitored node 4 as an example.
  • the monitored node 4 initiates a Pdelay line delay measurement mechanism from the left and right rings to the time reference point 1, respectively, and obtains the line delay times line-delay_left and line-delay-right respectively.
  • the monitored node 4 sends a unicast delay-req message from the left and right rings to the time reference point 1, respectively, and records the transmission time stamps of the left and right rings delay-req, t3_left and t3_right.
  • Monitored node 2 monitored node 3
  • monitored node 5 monitored node 6 pair delay-req
  • the time reference point 1 receives the delay_req 4 ⁇ text from the left and right rings, records the respective receiving time stamps t4_left and t4_right, and generates the corresponding delay_ resp 4 ⁇ text.
  • the monitored node 4 receives delay-resp messages from the left and right rings, and extracts t4_left and t4-right and correct-left and correct-right. Diff_left and diff_right are calculated according to the following formula (1) and formula (2), and whether there is an alarm according to the unilateral alarm threshold.
  • Diff—right t4—right-t3—right-correct—right-line—delay—right ( 2 ) If the above Diff—left and Diff—right do not exceed the unilateral alarm threshold, then judge
  • the same monitoring is established at the monitored node 2, the monitored node 3, the monitored node 5, and the monitored node 6. If the device is running dead at the monitored node 3, the network management of the ring network is known. If the monitored node 3 has a time calculation abnormality, an alarm may occur on the monitored node 3 and the monitored node 4. If there is an asymmetry fault between the monitored node 2 and the monitored node 3, an alarm may occur on the monitored node 2, the monitored node 3, and the monitored node 4.
  • FIG. 3 is a structural diagram of a time fault monitoring system according to an embodiment of the present invention. As shown in FIG. 3, the monitored node 32 and the time reference point 34 are included, wherein the monitored node 32 includes a measurement module 322. Time failure monitoring module 324. The structure is described in detail below.
  • the measurement module 322 is configured to measure a clockwise time error and/or a counterclockwise time error with respect to the time reference point along the clockwise and/or counterclockwise direction of the ring network; the monitoring module 324 is connected to the measurement module 322, It is set to monitor the time fault according to the clockwise time error measured by the measurement module 322 and/or the reverse time time error of 40 degrees.
  • the time fault monitoring system described in the device embodiment corresponds to the foregoing method embodiment, and the specific implementation process has been described in detail in the method embodiment, and is not described herein.
  • a time failure monitoring method and system are provided.
  • the time error obtained from the clockwise direction and the counterclockwise direction is almost the same according to any node in the ring network, so that the time fault is monitored by monitoring the time error, thereby improving the maintenance efficiency and the application cost of the descending.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be executed by a computing device This can be implemented, and thus, they can be stored in a storage device by a computing device, or they can be fabricated into individual integrated circuit modules, or a plurality of modules or steps can be implemented as a single integrated circuit module.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)

Abstract

La présente invention porte sur un procédé et un système de surveillance de fautes de temps. Le procédé comprend les opérations suivantes : un nœud surveillé dans un réseau en anneau mesure une différence de temps dans le sens des aiguilles d'une montre et/ou une différence de temps dans le sens inverse des aiguilles d'une montre de celui-ci par rapport à un point de référence temporel dans une direction dans le sens des aiguilles d'une montre et/ou dans une direction dans le sens inverse des aiguilles d'une montre (S202), et le nœud surveillé surveille les fautes de temps selon la différence de temps dans le sens des aiguilles d'une montre et/ou la différence de temps dans le sens inverse des aiguilles d'une montre (S204). Les différences de temps de n'importe quel nœud dans le réseau en anneau obtenues dans la direction dans le sens des aiguilles d'une montre et dans la direction dans le sens inverse des aiguilles d'une montre sont environ les mêmes. Par conséquent, l'invention surveille les fautes de temps par surveillance des différences de temps, permettant ainsi d'améliorer l'efficacité de maintenance et de réduire le coût d'application.
PCT/CN2011/076729 2011-03-11 2011-06-30 Procédé et système de surveillance de fautes de temps Ceased WO2012122759A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201110059696.1 2011-03-11
CN201110059696.1A CN102684933B (zh) 2011-03-11 2011-03-11 时间故障监测方法及系统
CN201110131600.8A CN102790703B (zh) 2011-05-19 2011-05-19 时间故障监测方法及系统
CN201110131600.8 2011-05-19

Publications (1)

Publication Number Publication Date
WO2012122759A1 true WO2012122759A1 (fr) 2012-09-20

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PCT/CN2011/076729 Ceased WO2012122759A1 (fr) 2011-03-11 2011-06-30 Procédé et système de surveillance de fautes de temps

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002094491A (ja) * 2000-09-11 2002-03-29 Ntt Communications Kk 時刻同期システム及び伝送装置
CN1398462A (zh) * 2000-12-05 2003-02-19 索尼株式会社 移动通信系统
US20050047328A1 (en) * 2003-08-27 2005-03-03 Alcatel Ring network system
CN1835433A (zh) * 2005-03-14 2006-09-20 安捷伦科技有限公司 多个时间同步域的应用

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002094491A (ja) * 2000-09-11 2002-03-29 Ntt Communications Kk 時刻同期システム及び伝送装置
CN1398462A (zh) * 2000-12-05 2003-02-19 索尼株式会社 移动通信系统
US20050047328A1 (en) * 2003-08-27 2005-03-03 Alcatel Ring network system
CN1835433A (zh) * 2005-03-14 2006-09-20 安捷伦科技有限公司 多个时间同步域的应用

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