WO2016150021A1

WO2016150021A1 - Packet forwarding delay measurement method, device and system

Info

Publication number: WO2016150021A1
Application number: PCT/CN2015/082106
Authority: WO
Inventors: 徐春松; 张树冲; 钟炜; 蔡广平
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-03-24
Filing date: 2015-06-23
Publication date: 2016-09-29
Also published as: CN106161121A; CN106161121B

Abstract

Provided are a packet forwarding delay measurement method, device and system. The packet forwarding delay measurement method comprises: obtaining a time difference between a sending end sending a measurement packet to a receiving end and receiving a measurement response packet fed back by the receiving end, obtaining a processing time for the receiving end with regard to the measurement packet, and obtaining a time deviation between at least two modules in at least one end within the two ends of the sending end and the receiving end, said modules processing the packet; calculating a packet forwarding delay between the sending end and the receiving end according to the time difference, the processing time and the time deviation. The present invention solves the problem in the prior art that with regard to a packet forwarding delay between two ends, delay calculation is not accurate due to times not being synchronised, and a time deviation between modules produced by there being a plurality of modules processing a packet on at least one end. The present invention increases the accuracy of calculating the delay between the sending end and the receiving end.

Description

Method, device and system for measuring message forwarding delay

Technical field

The present invention relates to the field of data communications, and in particular, to a method, device, and system for measuring packet forwarding delay.

Background technique

In the field of data communication, packets are forwarded in the network, and each node needs a certain amount of time to process. In some cases, we need to know the delay experienced by packets in the network device and master the forwarding in the network. situation. There are currently some techniques for delay measurement of frames or messages. DM (Delay Measurement) function such as Ethernet OAM (Operation Administration and Maintenance), DM function in MPLS-TP (Multi-Protocol Label Switching Transport Profile) OAM . The measurement principle of implementing frame or packet forwarding delay in Ethernet OAM and MPLS-TP OAM is similar and can be regarded as the same technology. There are two ways to test the frame delay, namely unidirectional DM and bidirectional DM. The following describes some of its principles. For a unidirectional DM, 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, and the receiving end R2 receives the receiving timestamp T2 of the message when receiving the message, so that the calculation of the frame delay is specifically: frame delay=T2-T1.

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. In addition, 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.

Summary of the invention

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.

In order to solve the above problem, the embodiment of the present invention adopts the following technical solutions:

A method for measuring packet forwarding delay includes:

Acquiring a time difference between a measurement message sent by the sending end to the receiving end and receiving the measurement response message fed back by the receiving end, obtaining a processing time of the measuring end by the receiving end, and acquiring the sending end and receiving a time offset between at least two modules that process the message in at least one of the two ends;

And calculating, according to the time difference, the processing time, and the time offset, a packet forwarding delay between the sending end and the receiving end.

In the embodiment of the present invention, 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.

In the embodiment of the present invention, the acquiring process of the first time offset includes:

Acquiring the first transmission time that the first receiving module transmits the measurement response message to the first sending module, and acquiring the measurement response report that the first receiving module receives the feedback from the first sending module Second receiving time of the text;

Obtaining a first receiving time that the first sending module receives the measurement response message sent by the first receiving module, and acquiring, by the first sending module, the measurement response message to the first receiving module Second transmission time;

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.

In the embodiment of the present invention, the acquiring process of the second time deviation includes:

Obtaining, by the second receiving module, the third transmission time that the measurement message is transmitted to the second sending module, and acquiring, by the second receiving module, the measurement message that is sent by the second sending module Fourth receiving time;

Obtaining, by the second sending module, a third receiving time of the measurement message sent by the second receiving module, and acquiring, by the second sending module, the measurement message to the fourth receiving module Transmission time

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.

In the embodiment of the present invention, if the time deviation includes a first time deviation, 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;

If the time deviation includes a second time offset, 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;

If the time deviation includes a first time deviation and a second time deviation, 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.

And the obtaining, by 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 .

In the embodiment of the present invention, the acquiring process of the first time deviation specifically includes:

In the embodiment of the present invention, if the time deviation includes a first time deviation, 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;

If the time offset includes the second time offset, 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;

If the time deviation includes a first time deviation and a second time deviation, 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.

Advantageous effects of embodiments of the present invention:

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. In the present invention, 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.

DRAWINGS

1 is a flowchart of a method for measuring a packet forwarding delay according to Embodiment 1 of the present invention;

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.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings.

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.

Specifically, 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.

Preferably, 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:

If the time deviation includes the first time deviation, 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;

If the time deviation includes the second time deviation, 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;

If the time deviation includes the first time deviation and the second time deviation, 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.

For example, 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; For the measurement packet, the packet forwarding delay between R1 and R2 is calculated between R1 and R2. Please refer to 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. At this time, the DMM message is as shown in FIG. 2, and the second receiving module of R2 receives the message. After receiving the DMM packet, 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;

Then, 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. Send the timestamp T3 when sending, as shown in Figure 8 (other timestamps are copied from the DMM message);

R1 receives the DMR message sent by R2, and receives the receiving timestamp T4. As shown in 9 of FIG. 2, 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. As shown in FIG. 10, 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. As shown in FIG. 12, 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. Transmission on M2, generating four timestamps of T9, T10, T11, and T12. Similarly, the time deviation between the time stamps T4 generated on R1 can be obtained as: (T12-T11)-[(T12-T9)–(T11-T10)]/2;

The two-way forwarding delay of the packet on R1 and R2 can be calculated by using the timestamps obtained in the foregoing. That is, the packet forwarding delay between R1 and R2 = (T4 - T1) - {(T12-T11) - [(T12-T9) - (T11-T10)] / 2} - (T3 –T2)+{(T6-T5)-[(T8-T5)-(T7-T6)]/2}; When the network between R1 and R2 is symmetric, the one-way forwarding delay is the value of the two-way delay Divide by 2.

In this embodiment, 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:

FIG. 14 is a schematic structural diagram of a device for measuring a packet forwarding delay according to Embodiment 2 of the present invention. Referring to FIG. 30, 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.

Preferably, 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 calculation method of the first time deviation and the second time deviation has been described in the method embodiment, and therefore, it will not be described here.

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. In the system, 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 above is a further detailed description of the present invention in connection with the specific embodiments, and the specific embodiments of the present invention are not limited to the description. For those of ordinary skill in the art to which the present invention pertains, A number of simple derivations or substitutions may be made without departing from the spirit and scope of the invention.

Industrial applicability

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 . In the present invention, 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.

Claims

A method for measuring packet forwarding delay includes:

Acquiring a time difference between a measurement message sent by the sending end to the receiving end and receiving the measurement response message fed back by the receiving end, obtaining a processing time of the measuring end by the receiving end, and acquiring the sending end and receiving a time offset between at least two modules that process the message in at least one of the two ends;

And calculating, according to the time difference, the processing time, and the time offset, a packet forwarding delay between the sending end and the receiving end.
The method for measuring a packet forwarding delay according to claim 1, wherein the time offset comprises: a first time offset and/or a second time offset; wherein the first time offset is a report in the sender And a time deviation between the first sending module and the first receiving module, where the second time deviation is a time between the second receiving module and the second sending module that processes the packet in the receiving end deviation;

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 method for measuring a packet forwarding delay according to claim 2, wherein the acquiring the first time offset comprises:

Acquiring the first transmission time that the first receiving module transmits the measurement response message to the first sending module, and acquiring the measurement response report that the first receiving module receives the feedback from the first sending module Second receiving time of the text;

Obtaining a first receiving time that the first sending module receives the measurement response message sent by the first receiving module, and acquiring, by the first sending module, the measurement response message to the first receiving module Second transmission time;

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 method for measuring a packet forwarding delay according to claim 2, wherein the acquiring the second time offset comprises:

Obtaining, by the second receiving module, the third transmission time that the measurement message is transmitted to the second sending module, and acquiring, by the second receiving module, the measurement message that is sent by the second sending module Fourth receiving time;

Obtaining, by the second sending module, a third receiving time of the measurement message sent by the second receiving module, and acquiring, by the second sending module, the measurement message to the fourth receiving module Transmission time

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 method for measuring a packet forwarding delay according to any one of claims 2 to 4, wherein if the time offset includes a first time offset, the method for calculating the packet forwarding delay comprises: calculating the Obtaining a difference between the time difference and the first time deviation, obtaining a first sending and receiving time value of the sending end; and subtracting the processing time from the first sending and receiving time value to obtain the packet forwarding delay;

If the time deviation includes a second time offset, 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;

If the time offset includes the first time offset and the second time offset, the specific method of the packet forwarding delay includes: calculating a difference between the time difference and the first time offset, to obtain 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 apparatus for measuring packet forwarding delay according to claim 6, wherein the time offset comprises: a first time offset and/or a second time offset; wherein the first time offset is a report in the sender And a time deviation between the first sending module and the first receiving module, where the second time deviation is a time between the second receiving module and the second sending module that processes the packet in the receiving end Deviation

And the obtaining, by the acquiring module, 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, specifically: acquiring the first time offset and/or the Second time deviation.
The apparatus for measuring a packet forwarding delay according to claim 7, wherein the acquiring process of the first time offset comprises:

Acquiring the first transmission time that the first receiving module transmits the measurement response message to the first sending module, and acquiring the measurement response report that the first receiving module receives the feedback from the first sending module Second receiving time of the text;

Obtaining a first receiving time that the first sending module receives the measurement response message sent by the first receiving module, and acquiring, by the first sending module, the measurement response message to the first receiving module Second transmission time;

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 apparatus for measuring a packet forwarding delay according to claim 7, wherein the acquiring process of the second time offset comprises:

Obtaining, by the second receiving module, the third transmission time that the measurement message is transmitted to the second sending module, and acquiring, by the second receiving module, the measurement message that is sent by the second sending module Fourth receiving time;

Obtaining, by the second sending module, a third receiving time of the measurement message sent by the second receiving module, and acquiring, by the second sending module, the measurement message to the fourth receiving module Transmission time

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 apparatus for measuring a packet forwarding delay according to any one of claims 7-9, wherein, if the time offset includes a first time offset, the calculating module specifically includes: a first transceiver time calculation submodule, Set to calculate a difference between the time difference and the first time deviation, to obtain a first transceiver time value of the sending end; a delay calculation submodule, configured to subtract the first transceiver time value from the processing The time is obtained by the packet forwarding delay;

If the time deviation includes a second time deviation, the calculation module specifically includes: a second transceiver time calculation sub-module, configured to calculate a difference between the processing time and the second time deviation, to obtain a a second transmission and reception time value of the receiving end; a delay calculation submodule, configured to subtract the second transmission and reception time value from the time difference to obtain the packet forwarding delay;

If the time deviation includes a first time deviation and a second time deviation, 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 message 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 claims 6 to 10.