WO2016150021A1 - Procédé, dispositif et système de mesure de retard de transfert de paquet - Google Patents

Procédé, dispositif et système de mesure de retard de transfert de paquet Download PDF

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Publication number
WO2016150021A1
WO2016150021A1 PCT/CN2015/082106 CN2015082106W WO2016150021A1 WO 2016150021 A1 WO2016150021 A1 WO 2016150021A1 CN 2015082106 W CN2015082106 W CN 2015082106W WO 2016150021 A1 WO2016150021 A1 WO 2016150021A1
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WO
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Prior art keywords
time
receiving
sending
module
acquiring
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PCT/CN2015/082106
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English (en)
Chinese (zh)
Inventor
徐春松
张树冲
钟炜
蔡广平
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中兴通讯股份有限公司
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Publication of WO2016150021A1 publication Critical patent/WO2016150021A1/fr

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    • 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

Definitions

  • the present invention relates to the field of data communications, and in particular, to a method, device, and system for measuring packet forwarding delay.
  • DM Delay Measurement
  • Ethernet OAM Operation Administration and Maintenance
  • MPLS-TP Multi-Protocol Label Switching Transport Profile
  • a DM information frame is sent between two network devices.
  • the two network devices include a transmitting end R1 and a receiving end R2, and the frame is sent from the transmitting end R1 to the receiving end R2 (there may be other devices in the middle), when transmitting,
  • the sending end R1 puts the timestamp T1 of the sending message in the message
  • the above method for calculating the delay is simple, but the device needs to support the time synchronization of the IEEE1588 (Institute of Electrical and Electronics Engineers IEEE1588 network measurement and control system precision clock synchronization protocol standard) function, otherwise the time at both ends is not synchronized, and the calculation is performed.
  • the delay is meaningless.
  • even if the time synchronization of the devices at both ends if the processing of the packets in the device is in different modules, there is a problem that the delay calculation is inaccurate due to the phase difference between the modules.
  • the embodiment of the present invention provides a method, a device, and a system for measuring a packet forwarding delay, which solves the problem that the delay of packet forwarding between two ends is not synchronized due to time and exists on at least one end.
  • the module processes the message to generate a time offset between the modules, which makes the delay calculation inaccurate.
  • the embodiment of the present invention adopts the following technical solutions:
  • a method for measuring packet forwarding delay includes:
  • the time deviation includes: a first time deviation and/or a second time deviation; the first time deviation is a first sending module and a first process for processing a message in the sending end Receiving a time deviation between the modules, wherein the second time deviation is a time deviation between the second receiving module and the second sending module that processes the message in the receiving end;
  • Acquiring the time offset between the at least two modules that process the packet in the at least one of the two ends of the sending end and the receiving end includes: acquiring the first time offset and/or the second time offset.
  • the acquiring process of the first time offset includes:
  • the first time offset is calculated according to the first transmission time, the first reception time, the second transmission time, and the second reception time.
  • the acquiring process of the second time deviation includes:
  • the second time offset is calculated according to the third transmission time, the third reception time, the fourth transmission time, and the fourth reception time.
  • the calculation method of the packet forwarding delay includes: calculating a difference between the time difference and the first time deviation, to obtain the a first sending and receiving time value of the sending end; subtracting the processing time from the first sending and receiving time value to obtain the packet forwarding delay;
  • the method for calculating the packet forwarding delay includes: calculating a difference between the processing time and the second time offset, and obtaining a second sending and receiving time value of the receiving end; And subtracting the time difference from the time difference to obtain the packet forwarding delay;
  • the calculation method of the message forwarding delay includes: calculating a difference between the time difference and the first time deviation, and obtaining the sending end a first transceiver time value; calculating a difference between the processing time and the second time offset to obtain a second transceiver time value of the receiving end; and subtracting the second transceiver time value from the first transceiver time value
  • the packet is forwarded with a delay.
  • a measuring device for packet forwarding delay includes:
  • the obtaining module is configured to obtain a time difference between a measurement message sent by the sending end to the receiving end and a measurement response message sent by the receiving end, and is further configured to obtain a processing time of the measuring end by the receiving end, And setting a time offset between at least two modules that process the packet in at least one of the two ends of the sending end and the receiving end;
  • the calculating module is configured to calculate a packet forwarding delay between the sending end and the receiving end according to the time difference, the processing time, and the time offset.
  • the time deviation includes: a first time deviation and/or a second time deviation; the first time deviation is a first sending module and a first process for processing a message in the sending end Receiving a time deviation between the modules, wherein the second time deviation is a time deviation between the second receiving module and the second sending module that processes the message in the receiving end;
  • the acquiring module the time deviation between the at least two modules that process the packet in the at least one of the two ends of the sending end and the receiving end, specifically: acquiring the first time offset and/or the second time offset .
  • the acquiring process of the first time deviation specifically includes:
  • the first time offset is calculated according to the first transmission time, the first reception time, the second transmission time, and the second reception time.
  • the acquiring process of the second time deviation includes:
  • the second time offset is calculated according to the third transmission time, the third reception time, the fourth transmission time, and the fourth reception time.
  • the calculating module specifically includes: a first sending and receiving time calculating submodule, configured to calculate between the time difference and the first time deviation Poor, obtaining a first transceiver time value of the sending end; a delay calculation sub-module, configured to subtract the processing time from the first transceiver time value to obtain the packet forwarding delay;
  • the calculating module specifically includes: a second transceiver time calculation submodule, configured to calculate a difference between the processing time and the second time offset, to obtain a a second transmission and reception time value; a delay calculation submodule, configured to subtract the second transmission and reception time value from the time difference to obtain the packet forwarding delay;
  • the calculating module specifically includes: a first transceiver time calculation submodule, configured to calculate a difference between the time difference and the first time deviation, Obtaining a first sending and receiving time value of the sending end; the second sending and receiving time calculating submodule is configured to calculate a difference between the processing time and the second time deviation, to obtain a second sending and receiving time value of the receiving end; delay calculation And the submodule is configured to obtain the packet forwarding delay by subtracting the second transceiving time value from the first transceiving time value.
  • a measurement system for packet forwarding delay includes a transmitting end and a receiving end, and the transmitting end includes the measuring device for packet forwarding delay according to any one of the above.
  • the embodiment of the invention provides a method, a device and a system for measuring a packet forwarding delay, which are obtained by acquiring a time difference between a transmitting end transmitting a measurement message to a receiving end and receiving a measurement response message fed back by the receiving end, and receiving end Calculating the processing time between the transmitting end and the receiving end by calculating the processing time of the measurement packet and the time deviation between at least two modules processing the packet in at least one of the transmitting end and the receiving end Delay.
  • the problem of time synchronization is first eliminated by the bidirectional DM, and the time delay between the two ends is calculated by acquiring the time deviation between at least two modules that process the packet in at least one end, and the delay is improved.
  • the accuracy of the delay between the sender and the receiver is calculated, so that the engineering personnel can understand the forwarding state in the network more clearly, and thus make a more accurate judgment.
  • FIG. 1 is a flowchart of a method for measuring a packet forwarding delay according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic diagram of a packet corresponding to a timestamp T1 when the timestamp is recorded according to Embodiment 1 of the present invention
  • FIG. 3 is a schematic diagram of a message corresponding to a timestamp T2 recorded according to Embodiment 1 of the present invention
  • FIG. 4 is a schematic diagram of a message corresponding to a timestamp T5 recorded according to Embodiment 1 of the present invention.
  • FIG. 5 is a schematic diagram of a message corresponding to a timestamp T6 recorded according to Embodiment 1 of the present invention.
  • FIG. 6 is a schematic diagram of a message corresponding to a timestamp T7 recorded according to Embodiment 1 of the present invention.
  • FIG. 7 is a schematic diagram of a message corresponding to a timestamp T8 recorded according to Embodiment 1 of the present invention.
  • FIG. 8 is a schematic diagram of a packet corresponding to a timestamp T3 recorded according to Embodiment 1 of the present invention.
  • FIG. 9 is a schematic diagram of a message corresponding to a timestamp T4 recorded according to Embodiment 1 of the present invention.
  • FIG. 10 is a schematic diagram of a message corresponding to a timestamp T9 recorded according to Embodiment 1 of the present invention.
  • FIG. 11 is a schematic diagram of a message corresponding to a timestamp T10 recorded according to Embodiment 1 of the present invention.
  • FIG. 12 is a schematic diagram of a message corresponding to a packet when a timestamp T11 is recorded according to Embodiment 1 of the present invention.
  • FIG. 13 is a schematic diagram of a packet corresponding to a packet when a timestamp T12 is recorded according to Embodiment 1 of the present invention.
  • FIG. 14 is a schematic structural diagram of a device for measuring packet forwarding delay according to Embodiment 2 of the present invention.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • FIG. 1 is a flowchart of a method for measuring a packet forwarding delay according to Embodiment 1 of the present invention. see FIG.
  • S101 Obtain a time difference between a measurement message sent by the sending end to the receiving end and a measurement response message sent by the receiving end, obtain a processing time of the measurement message by the receiving end, and obtain the sending end. And a time offset between at least two modules that process the packet in at least one of the two ends of the receiving end;
  • the method for obtaining the time difference includes: obtaining a packet sending time of the measurement packet sent by the sending end to the receiving end, and acquiring a receiving time of the measurement response message fed back by the receiving end by the sending end, and then receiving the receiving time Time subtracting the message transmission time to obtain the time difference;
  • the method for obtaining the processing time includes: obtaining, by the receiving end, a packet receiving time of the measurement packet sent by the sending end, and acquiring, by the receiving end, a sending time of the measurement response message to the sending end, and then The sending time is subtracted from the packet receiving time to obtain a processing time of the receiving end;
  • the obtaining the time deviation includes at least: setting the time deviation between at least two modules that can process the message between the sending end and/or the receiving end by an engineering staff. Deviation value; or using a time measurement tool between the modules to measure the time deviation between at least two modules processing the message between the sender and/or the receiver to obtain a time offset value; or, by Transmitting a message between the at least two modules, and recording each key time value in the transmission process, and calculating a time deviation value between the at least two modules;
  • S102 Calculate a packet forwarding delay between the sending end and the receiving end according to the time difference, the processing time, and the time offset.
  • the packet forwarding delay includes: a unilateral delay and a bilateral delay; in the case that the network between the transmitting end and the receiving end is symmetric, the unilateral delay between the two ends is half of the bilateral delay, In the invention, it is assumed that the transmitting end and the receiving end are network-symmetrical.
  • the specific calculation method of the packet forwarding delay includes: calculating a difference between the time difference and the processing time, and subtracting the difference between the time difference and the processing time according to the judgment of the time deviation Add the time deviation.
  • the time offset includes: a first time offset and/or a second time offset; the first time offset is between the first sending module and the first receiving module that processes the packet in the sending end Time deviation, the second time deviation is a time deviation between the second receiving module and the second sending module that processes the message in the receiving end; and the obtaining the sending end and receiving in the step S101
  • the time offset between the at least two modules that process the packet in the at least one end of the two ends includes: acquiring the first time offset and/or the second time offset.
  • the acquiring the first time deviation includes: acquiring a first transmission time that the first receiving module transmits the measurement response message to the first sending module, and acquiring the first receiving module Receiving a second receiving time of the measurement response message that is sent by the first sending module, and acquiring, by the first sending module, a first receiving time of receiving the measurement response message sent by the first receiving module, and acquiring the Transmitting, by the first sending module, the measurement response message to the second transmission time of the first receiving module; calculating, according to the first transmission time, the first receiving time, the second transmission time, and the second receiving time a time deviation; the specific calculation process of the first time deviation includes: calculating a difference between the second reception time and the first transmission time, obtaining t1; calculating a difference between the second transmission time and the first reception time, obtaining t2; Calculating the difference between the second receiving time and the second transmission time, obtaining t3; the first time deviation is: t3-(t1-t2).
  • the acquiring process of the second time offset includes: acquiring a third transmission time that the second receiving module transmits the measurement message to the second sending module, and acquiring, by the second receiving module, the Receiving, by the second sending module, the fourth receiving time of the measurement message that is sent by the sending module, acquiring the third receiving time of the second sending module, and acquiring the second receiving module, and acquiring the second sending module Transmitting the measurement message to the second transmission time of the second receiving module; and calculating the second time offset according to the third transmission time, the third receiving time, the fourth transmission time, and the fourth receiving time.
  • the specific calculation process of the second time offset includes: calculating a difference between the fourth receiving time and the third transmission time to obtain t4; calculating a difference between the fourth transmission time and the third receiving time to obtain t5; calculating the fourth receiving The difference between the time and the third transmission time gives t6; the second time deviation is: t6-(t5-t4).
  • the packet forwarding delay obtained by the first deviation and/or the second deviation specifically includes:
  • the specific calculation method of the packet forwarding delay includes: calculating a difference between the time difference and the first time deviation, and obtaining a first sending and receiving time of the sending end And subtracting the processing time from the first transceiver time value to obtain the packet forwarding delay;
  • the specific calculation method of the packet forwarding delay includes: calculating a difference between the processing time and the second time deviation, and obtaining a second sending and receiving time value of the receiving end And subtracting the second transmission and reception time value from the time difference to obtain the packet forwarding delay;
  • the specific calculation method of the packet forwarding delay includes: calculating a difference between the time difference and the first time deviation, to obtain the sending a first transceiver time value of the terminal; calculating a difference between the processing time and the second time offset to obtain a second transceiver time value of the receiving end; and subtracting the second transceiver time value from the first transceiver time value The packet is forwarded to the delay.
  • the network device includes a transmitting end R1 and a receiving end R2, and includes in R1: a first sending module M1 and a first receiving module M2; and in R2, a second sending module M3 and a second receiving module M4;
  • the packet forwarding delay between R1 and R2 is calculated between R1 and R2.
  • the schematic diagram of the corresponding packet when recording each timestamp in Figure 2-13 Specifically include:
  • a DMM (Delay Measurement Message) message is sent from the first sending module M1 of R1 to R2, and carries a transmission timestamp T1.
  • the DMM message is as shown in FIG. 2, and the second receiving module of R2 receives the message.
  • the receiving timestamp T2 is displayed, as shown in FIG. 3;
  • the DMM packet is internally transmitted in R2, and the transmission process includes: when the second receiving module M4 sends the DMM packet to the second sending module M3, it sends a timestamp T5, as shown in FIG. 4, the second sending module M3 After receiving the DMM packet, the receiving timestamp T6 is displayed, as shown in FIG. 5, and then the DMM packet is sent to the second receiving module M4, and the sending timestamp T7 is sent when sending, as shown in FIG. When the receiving module M4 receives the DMM packet, it receives the receiving timestamp T8, as shown in FIG. 7.
  • the transmission and reception between M3 and M4 is symmetrical, and the transmission delay between the messages M3 and M4 is [(T8-T5)-(T7-T6)]/2, so that M4 can be obtained between M3 and M3.
  • the second time deviation is (T6-T5)-[(T8-T5)-(T7-T6)]/2;
  • the DMM message is sent to the control plane, and the control plane sends a DMR (DelayMeasurement Reply) message, which is sent out from R2 by the second sending module M4.
  • DMR DelayMeasurement Reply
  • R1 receives the DMR message sent by R2, and receives the receiving timestamp T4.
  • the DMR message is internally transmitted in R2, and the first receiving module M2 sends the DMR message to the first sending.
  • the module M1 is configured with a sending timestamp T9.
  • the first sending module M1 receives the DMR message and then receives the receiving timestamp T10, as shown in FIG. 11, and then sends the DMR message to the first.
  • the receiving module M2 sends a timestamp T11 to the sending.
  • the first receiving module M2 receives the receiving timestamp T12 when receiving the DMR message, as shown in FIG. 13; the message is in the internal component M1 of R1.
  • the one-way forwarding delay is the value of the two-way delay Divide by 2.
  • the time difference between at least two modules processing the packet in at least one end between the transmitting end and the receiving end is used to calculate the packet between the transmitting end and the receiving end by combining other time values.
  • the forwarding delay improves the accuracy of the delay calculation and facilitates the judgment and processing of the equipment by the engineering personnel.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • FIG. 14 is a schematic structural diagram of a device for measuring a packet forwarding delay according to Embodiment 2 of the present invention.
  • the packet forwarding delay measuring apparatus 20 includes: an obtaining module 201 and a computing module.
  • the obtaining module 201 is configured to obtain a time difference between a measurement message sent by the sending end to the receiving end and a measurement response message sent by the receiving end, and is further configured to obtain the receiving end to measure the message
  • the processing time is further set to obtain a time offset between at least two modules that process the packet in at least one of the two ends of the sending end and the receiving end;
  • the calculating module 202 is configured to process according to the time difference
  • the time and time deviation calculates a packet forwarding delay between the sender and the receiver.
  • the measuring device 20 of the packet forwarding delay is generally disposed in the transmitting end or in a server or the like.
  • the time deviation includes: a first time deviation and/or a second time deviation; the first time deviation is between the first sending module and the first receiving module that processes the message in the sending end Time deviation, the second time deviation is a time deviation between the second receiving module and the second sending module that processes the packet in the receiving end; the obtaining module 201 is configured to acquire the sending end and
  • the time offset between the at least two modules that process the packet in the at least one of the two ends of the receiving end includes: acquiring the first time offset and/or the second time offset.
  • the invention also provides a measurement system for packet forwarding delay, comprising a transmitting end and a receiving end, wherein the transmitting end comprises the measuring device for packet forwarding delay.
  • the delay of the packet forwarding between the sender and the receiver is calculated by the setting of the measurement device of the packet forwarding delay at the transmitting end, and the obtained delay value is more accurate.
  • the invention provides a method, a device and a system for measuring a packet forwarding delay, which are obtained by acquiring time deviations between at least two modules processing at least one end of the packet and combining other time points to calculate the two ends.
  • the delay between the two increases the accuracy of the delay between the sender and the receiver.
  • the foregoing technical solution provided by the present invention can be applied to the measurement of the packet forwarding delay, and obtains the time difference between the measurement message sent by the transmitting end to the receiving end and the measurement response message fed back by the receiving end, and the receiving end is opposite. Calculating the processing time of the measurement packet and the time offset between the at least two modules processing the packet in at least one of the two ends of the transmitting end and the receiving end to calculate the packet forwarding delay between the transmitting end and the receiving end .
  • the problem of time synchronization is first eliminated by the bidirectional DM, and the time delay between the two ends is calculated by acquiring the time deviation between at least two modules that process the packet in at least one end, and the delay is improved. Calculate the delay accuracy between the sender and the receiver.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

L'invention concerne un procédé, un dispositif et un système de mesure de retard de transfert de paquet. Le procédé de mesure de retard de transfert de paquet consiste : à obtenir une différence de temps entre l'envoi, par une extrémité d'envoi, d'un paquet de mesure à une extrémité de réception et la réception d'un paquet de réponse de mesure renvoyé par l'extrémité de réception, à obtenir un temps de traitement pour l'extrémité de réception en ce qui concerne le paquet de mesure, et à obtenir un écart de temps entre au moins deux modules dans au moins une extrémité dans les deux extrémités de l'extrémité d'envoi et de l'extrémité de réception, lesdits modules traitant le paquet ; à calculer un retard de transfert de paquet entre l'extrémité d'envoi et l'extrémité de réception selon la différence de temps, le temps de traitement et l'écart de temps. La présente invention résout le problème dans l'état de la technique selon lequel, en ce qui concerne un retard de transfert de paquet entre deux extrémités, le calcul de retard n'est pas précis en raison du fait que les temps ne sont pas synchronisés, et il y a un écart de temps entre des modules produit par l'existence d'une pluralité de modules traitant un paquet sur au moins une extrémité. La présente invention augmente la précision de calcul du retard entre l'extrémité d'envoi et l'extrémité de réception.
PCT/CN2015/082106 2015-03-24 2015-06-23 Procédé, dispositif et système de mesure de retard de transfert de paquet WO2016150021A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111327478A (zh) * 2020-02-28 2020-06-23 北京天维信通科技有限公司 网络测量方法和装置、设备及存储介质

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107196821A (zh) * 2017-05-24 2017-09-22 深圳市乃斯网络科技有限公司 网络链路中时延的校验方法及系统
CN108449228B (zh) * 2018-03-05 2020-03-17 新华三技术有限公司 报文处理方法及网络设备
CN110858811B (zh) * 2018-08-24 2022-01-18 华为技术有限公司 测量时延的方法和网络设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102025556A (zh) * 2009-09-21 2011-04-20 中兴通讯股份有限公司 一种oam包精确时延测量的方法和装置
CN102227110A (zh) * 2011-06-17 2011-10-26 华为技术有限公司 测量单向时延的方法、设备和通信系统
US8229705B1 (en) * 2008-08-05 2012-07-24 Marvell Israel (M.I.S.I.) Ltd. Performance monitoring in computer networks
CN102655463A (zh) * 2011-03-02 2012-09-05 中兴通讯股份有限公司 基于lmp的网络链路时延测量方法及装置
US20130336129A1 (en) * 2012-06-15 2013-12-19 Fujitsu Limited Multipurpose Use of Delay Measurement Message Buffer for Software Processing of Delay Measurement Response

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5018663B2 (ja) * 2008-06-17 2012-09-05 富士通株式会社 遅延時間計測装置、遅延時間計測プログラム、および遅延時間計測方法
CN102638339B (zh) * 2012-04-20 2014-12-24 杭州华三通信技术有限公司 一种用于实现精确时间同步的方法和装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8229705B1 (en) * 2008-08-05 2012-07-24 Marvell Israel (M.I.S.I.) Ltd. Performance monitoring in computer networks
CN102025556A (zh) * 2009-09-21 2011-04-20 中兴通讯股份有限公司 一种oam包精确时延测量的方法和装置
CN102655463A (zh) * 2011-03-02 2012-09-05 中兴通讯股份有限公司 基于lmp的网络链路时延测量方法及装置
CN102227110A (zh) * 2011-06-17 2011-10-26 华为技术有限公司 测量单向时延的方法、设备和通信系统
US20130336129A1 (en) * 2012-06-15 2013-12-19 Fujitsu Limited Multipurpose Use of Delay Measurement Message Buffer for Software Processing of Delay Measurement Response

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111327478A (zh) * 2020-02-28 2020-06-23 北京天维信通科技有限公司 网络测量方法和装置、设备及存储介质

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