WO2014075260A1

WO2014075260A1 - Time delay compensation method and apparatus

Info

Publication number: WO2014075260A1
Application number: PCT/CN2012/084662
Authority: WO
Inventors: 凌磊; 彭胜; 刘骁
Original assignee: 华为技术有限公司
Priority date: 2012-11-15
Filing date: 2012-11-15
Publication date: 2014-05-22
Also published as: CN103299582A; CN103299582B

Abstract

Disclosed are a time delay compensation method and apparatus. The method may comprise: performing time synchronization processing on a first device and a second device which perform service transmission; calculating main and standby time delay compensation values between the synchronized first device and second device; and performing time delay compensation on a service transmitted by a main path or a standby path between the first device and the second device by using the main and standby delay compensation values. By adopting the present invention, a transmission time delay of main and standby paths between devices can be compensated, thereby guaranteeing the symmetry of the time delay of the main and standby paths, and guaranteeing the normal transmission of services.

Description

Delay compensation method and device

The present invention relates to the field of communications technologies, and in particular, to the field of service transmission technologies, and in particular, to a delay compensation method and apparatus. Background technique

During the transmission process of the service, due to the processing of the transmission medium and the device, the transmission of the service may be delayed. When the service is transmitted in the device, the delay in the device is generated due to the processing of the device. The transmission medium usually includes optical fiber, air, etc., and the transmission delay occurs when the service is transmitted between the devices through the transmission medium. In order to ensure the normal transmission process of the service, the device that performs the service transmission usually has a primary path and a backup path. Normally, the primary path carries the service. When the primary path is abnormal (for example, the primary path is interrupted), The standby path transmits the service. The length of the primary and backup paths is different, for example, the length of the primary path is smaller than the length of the standby path, or the transmission capacity of the primary path is higher than the transmission capacity of the standby path, and so on, the transmission delay generated when the service is transmitted in the active and standby paths. It may be asymmetric. When the service has a high requirement for delay symmetry, the asymmetric transmission delay caused by the active/standby switchover may cause service interruption. Therefore, the transmission delay of the service on the primary and backup paths needs to be compensated. Ensure the symmetry of the transmission delay of the active and standby paths to ensure normal transmission of services. Summary of the invention

The invention provides a delay compensation method and device, which can compensate the transmission delay of the active and standby paths between the devices, ensure the symmetry of the delay of the active and standby paths, and ensure the normal transmission of the service.

A first aspect of the present invention provides a delay compensation method, which may include:

Performing time synchronization processing on the first device and the second device that perform service transmission;

Calculating a primary and secondary delay compensation value between the synchronized first device and the second device;

The time delay compensation is performed on the service transmitted by the primary path or the backup path between the first device and the second device by using the active/standby delay compensation value.

In the first feasible implementation manner, the calculation of the active/standby delay compensation value between the synchronized first device and the second device includes:

Transmitting the service from the first device, and transmitting the primary path between the first device and the second device When the channel is transmitted to the second device, the service is looped back from the second device, and is transmitted to the first device through the receiving channel of the primary path;

Calculating a path delay of the primary path according to a transmission time of the service in the primary path; transmitting a service from the first device, and transmitting the path through the backup path between the first device and the second device When the device is connected to the second device, the service is looped back from the second device, and is transmitted to the first device through the receiving channel of the standby path.

Calculating a path delay of the standby path according to a transmission time of the service in the standby path; determining, as a first half of an absolute value of a path delay difference between the primary path and the standby path, The active/standby delay compensation value between a device and the second device;

The length of the transceiver channel of the primary path is the same, and the length of the transceiver channel of the standby path is the same.

With reference to the first possible implementation manner of the first aspect, in the second feasible implementation manner, the adopting the active/standby delay compensation value, the primary path or the preparation between the first device and the second device The service of the path transmission is compensated for delay, including:

Comparing the size of the path delay between the primary path and the secondary path between the first device and the second device; if the path delay of the primary path is greater than the path delay of the standby path, transmitting the path in the standby path The service is delayed after the active/standby delay compensation value is output;

If the path delay of the standby path is greater than the path delay of the primary path, the service transmitted in the primary path is delayed after the primary and secondary delay compensation values are output.

With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner, the outputting the service in the standby path after the delay of the active/standby delay compensation value is performed, including:

Setting a FIFO (First Input First Output) buffer at an exit of the standby path;

Transmitting the traffic transmitted in the backup path to the FIFO buffer, and when the primary and backup delay compensation values are reached, reading the service from the FIFO buffer;

The outputting the service transmitted in the primary path after delaying the primary and secondary delay compensation values includes: setting a FIFO buffer at an exit of the primary path;

The traffic transmitted in the primary path is written to the FIFO buffer, and when the primary and backup delay compensation values are reached, the traffic is read from the FIFO buffer.

Combining the first aspect, the first feasible implementation manner of the first aspect, the second The implementation of the line or the third possible implementation manner of the first aspect, in the fourth possible implementation manner, the using the active/standby delay compensation value, between the first device and the second device After the service transmitted by the primary path or the backup path is compensated for delay, it also includes:

Calculating a full path delay compensation value between the first device and the second device, where the full path between the first device and the second device includes: a path between the first device, and between the first device and the second device a primary path or a standby path, and a path within the second device;

The full path delay compensation value is used to delay the service of the full path transmission between the first device and the second device.

With reference to the fourth possible implementation manner of the first aspect, in the fifth possible implementation, the calculating the full path delay compensation value between the first device and the second device includes:

Forwarding the service along the full path between the first device and the second device, and encapsulating the service at the forward entrance of the full path, where the encapsulated service includes the service reaching the positive Forward entry time information to the entrance;

Obtaining the forward exit time information of the service reaching the forward exit of the full path, and decapsulating the service at the forward exit, extracting the forward entry time information;

Calculating a forward delay of the full path according to the forward entry time information and the forward exit time information;

Forwarding the service along the entire path between the first device and the second device, and encapsulating the service at the reverse entry of the full path, where the encapsulated service includes the service reaching the reverse Reverse entry time information to the entrance and forward delay of the full path;

Obtaining reverse exit time information that the service reaches the reverse exit of the full path, and decapsulating the service at the reverse exit, extracting the reverse entry time information and the full path Positive delay

Calculating a reverse delay of the full path according to the reverse entry time information and reverse exit time information;

The absolute value of the delay difference between the forward delay and the reverse delay of the full path is determined as a full path delay compensation value between the first device and the second device.

With reference to the fifth possible implementation manner of the first aspect, in the sixth possible implementation manner, the using the full path delay compensation value, the full path transmission between the first device and the second device Business delay compensation, including: Comparing a size of a forward path and a reverse delay of the full path between the first device and the second device; if the forward delay is greater than the reverse delay, inverting the full path The transmitted service is delayed after the full path delay compensation value is output;

If the reverse delay is greater than the forward delay, the forward transmission traffic in the full path is delayed after the full path delay compensation value is output.

With reference to the sixth possible implementation manner of the first aspect, in a seventh possible implementation, the step of delaying the reverse transmission of the service in the full path after the full path delay compensation value is output, including: Setting a FIFO buffer at a reverse exit of the full path;

Transmitting the reversely transmitted traffic in the full path to the FIFO buffer, and when the full path delay compensation value is reached, reading the service from the FIFO buffer;

And delaying, after the delaying the full path delay compensation value, the service that is forwardly transmitted in the full path, including:

Setting a FIFO buffer at a forward exit of the full path;

The traffic forwarded in the full path is written to the FIFO buffer, and when the full path delay compensation value is reached, the traffic is read from the FIFO buffer. A second aspect of the present invention provides a time delay compensation apparatus, which may include:

a synchronization module, configured to perform time synchronization processing on the first device and the second device that perform service transmission; and an active/standby compensation calculation module, configured to calculate a primary and backup delay compensation value between the synchronized first device and the second device ;

The active/standby compensation module is configured to perform delay compensation on the service transmitted by the primary path or the backup path between the first device and the second device by using the active/standby delay compensation value.

In a first feasible implementation manner, the active/standby compensation calculation module includes:

a primary transmission unit, configured to initiate a transmission from the first device, and when the transmission channel of the primary path between the first device and the second device is transmitted to the second device, the service is looped back from the second device. Transmitting to the first device via the receiving channel of the primary path;

a primary delay calculation unit, configured to calculate a path delay of the primary path according to a transmission time of the service in the primary path;

a backup transmission unit, configured to initiate a transmission from the first device, and when the transmission path of the backup path between the first device and the second device is transmitted to the second device, the service is looped back from the second device. Economics The receiving channel of the prepared path is transmitted to the first device;

a time delay calculation unit, configured to calculate a path delay of the standby path according to a transmission time of the service in the standby path;

And an active/standby compensation determining unit, configured to determine 1/2 of an absolute value of a path delay difference between the primary path and the standby path as a primary and secondary delay compensation value between the first device and the second device;

With reference to the first possible implementation manner of the second aspect, in the second possible implementation manner, the active/standby compensation module includes:

a comparing unit, configured to compare a path delay of the primary path and the standby path between the first device and the second device;

And an active/standby compensation unit, configured to: after the path delay of the primary path is greater than the path delay of the standby path, delay the service transmitted in the standby path by delaying the primary and secondary delay compensation values; or The compensation unit is configured to: if the path delay of the standby path is greater than the path delay of the primary path, delay the service transmitted in the primary path by delaying the primary and secondary delay compensation values.

With reference to the second possible implementation manner of the second aspect, in the third possible implementation, the active/standby compensation unit is specifically configured to: if the path delay of the primary path is greater than the path delay of the standby path Providing a first-in first-out FIFO buffer at an exit of the standby path, and writing the traffic transmitted in the standby path to the FIFO buffer, when the primary and backup delay compensation values are reached, from the FIFO The buffer reads the service; or,

And if a path delay of the standby path is greater than a path delay of the primary path, setting a FIFO buffer at an exit of the primary path, and writing a service transmitted in the primary path to the FIFO buffer And when the primary and backup delay compensation values are reached, the service is read from the FIFO buffer.

With reference to the second aspect, the first feasible implementation manner of the second aspect, the second feasible implementation manner of the second aspect, or the third feasible implementation manner of the second aspect, in the fourth feasible implementation manner The device further includes:

a full compensation calculation module, configured to calculate a full path delay compensation value between the first device and the second device, where the full path between the first device and the second device includes: a path within the first device, and a first device a primary path or a secondary path with the second device, and a path within the second device;

a full compensation module, configured to use the full path delay compensation value, for the first device and the second device The inter-transmission service is compensated for delay.

With reference to the fourth possible implementation manner of the second aspect, in the fifth possible implementation manner, the full compensation calculation module includes:

a forward processing unit, configured to forward a service along a full path between the first device and the second device, and encapsulate the service at a forward entrance of the full path, where the encapsulated service includes Forward traffic time information of the service reaching the forward entrance; obtaining forward exit time information that the service reaches the forward exit of the full path, and the service at the forward exit Decapsulating, extracting the forward entry time information;

a forward delay calculation unit, configured to calculate a forward delay of the full path according to the forward entry time information and the forward exit time information;

a reverse processing unit, configured to reverse the service along the full path between the first device and the second device, and encapsulate the service at the reverse entry of the full path, where the encapsulated service includes The reverse entry time information of the service reaching the reverse entry and the forward delay of the full path; obtaining the reverse exit time information of the service reaching the reverse exit of the full path, and Decapsulating the service at the reverse egress, extracting the reverse entry time information and a forward delay of the full path;

a reverse delay calculation unit, configured to calculate a reverse delay of the full path according to the reverse entry time information and reverse exit time information;

The total compensation determining unit is configured to determine an absolute value of the delay difference between the forward delay and the reverse delay of the full path as a full path delay compensation value between the first device and the second device.

With reference to the fifth possible implementation manner of the second aspect, in the sixth possible implementation, the full compensation module includes:

a comparing unit, configured to compare a forward delay and a reverse delay of the full path between the first device and the second device;

a full compensation unit, configured to: if the forward delay is greater than the reverse delay, delay the service of the reverse transmission in the full path after the full path delay compensation value; or, if If the reverse delay is greater than the forward delay, the forward transmission service in the full path is delayed after the full path delay compensation value is output.

With reference to the sixth possible implementation of the second aspect, in a seventh possible implementation, the full compensation unit is specifically configured to: if the forward delay is greater than the reverse delay, Full path Setting a FIFO buffer at the reverse exit, writing the reverse-transferred traffic in the full path to the FIFO buffer, and reading the FIFO buffer when the full-path delay compensation value is reached Business; or,

And if the reverse delay is greater than the forward delay, setting a FIFO buffer at a forward exit of the full path, and writing a forward-transmitted service in the full path to the FIFO buffer, When the full path delay compensation value is reached, the traffic is read from the FIFO buffer. A third aspect of the invention provides a computer storage medium, the computer storage medium storing a program, the program comprising all or part of the steps of the method of the first aspect described above. A fourth aspect of the present invention provides another delay compensation apparatus, which may include a transmitter, a receiver, and a processor; wherein the processor performs the following steps:

In the first feasible implementation manner, when the step of calculating the active/standby delay compensation value between the first device and the second device after the synchronization is performed, the processor specifically includes the following steps:

Controlling the transmitter to initiate a transmission from the first device, and transmitting the service from the second device to the second device through the transmission path of the primary path between the first device and the second device, The receiving channel of the primary path is transmitted to the first device;

Calculating a path delay of the primary path according to a transmission time of the service in the primary path; controlling the transmitter to initiate a transmission from a first device, and preparing a device between the first device and the second device When the transmission path of the path is transmitted to the second device, the service is looped back from the second device, and is transmitted to the first device through the receiving channel of the standby path.

The length of the transceiver channel of the primary path is the same, and the length of the transceiver channel of the standby path is the same. With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner, the processor performs the using the active/standby delay compensation value between the first device and the second device When the step of performing the delay compensation for the service transmitted by the primary path or the backup path includes the following steps:

With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner, the processor performs the output after the service transmitted in the backup path is delayed by the active/standby delay compensation value The steps include the following steps:

Setting a first-in first-out FIFO buffer at an exit of the standby path;

When the processor performs the step of outputting the service transmitted in the primary path after delaying the primary and backup delay compensation values, the processor specifically includes the following steps:

Setting a FIFO buffer at an exit of the main path;

In combination with the first aspect, the first feasible implementation of the first aspect, the second possible implementation of the first aspect, or the third possible implementation of the first aspect, in a fourth possible implementation manner And performing, by the processor, the step of performing delay compensation on the service transmitted by the primary path or the backup path between the first device and the second device by using the active/standby delay compensation value, and performing the following steps: Calculating a full path delay compensation value between the first device and the second device, where the full path between the first device and the second device includes: a path between the first device, and between the first device and the second device a primary path or a standby path, and a path within the second device;

The time delay compensation is performed on the service transmitted between the first device and the second device by using the full path delay compensation value.

With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner, the processor is configured to perform the step of calculating a full path delay compensation value between the first device and the second device , Specifically, the following steps are included:

With reference to the fifth possible implementation of the first aspect, in a sixth possible implementation, the processor performs the using the full path delay compensation value, between the first device and the second device When the transmitted service performs the step of delay compensation, the following steps are specifically included:

Comparing a size of a forward path and a reverse delay of the full path between the first device and the second device; if the forward delay is greater than the reverse delay, inverting the full path The transmitted service is delayed after the full path delay compensation value is output;

With reference to the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner, the processor performs the step of delaying the reverse transmission of the full path in the full path delay compensation value After the step of outputting, the steps include the following steps:

Setting a FIFO buffer at a reverse exit of the full path; Transmitting the reversely transmitted traffic in the full path to the FIFO buffer, and when the full path delay compensation value is reached, reading the service from the FIFO buffer;

The step of the processor performing the step of outputting the forward-transferred service in the full path after delaying the full-path delay compensation value includes the following steps:

Setting a FIFO buffer at a forward exit of the full path;

The traffic forwarded in the full path is written to the FIFO buffer, and when the full path delay compensation value is reached, the traffic is read from the FIFO buffer.

The time delay compensation method of the present invention first performs time synchronization on the device for performing service transmission to ensure the accuracy of the delay compensation; on the basis of time synchronization, calculates the active/standby delay compensation value between the devices, and adopts the main The time delay compensation value compensates for the delay of the service transmitted by the primary/secondary path between devices, ensuring the symmetry of the delay of the active and standby paths and ensuring the normal transmission of services. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description It is merely some embodiments of the present invention, and those skilled in the art can obtain other drawings according to the drawings without any creative work.

FIG. 1 is a flowchart of a method for delay compensation according to an embodiment of the present invention;

Figure 2 is a flow chart of the embodiment of step S102 shown in Figure 1;

3 is a schematic diagram of delay compensation of active and standby paths according to an embodiment of the present invention;

Figure 4 is a flow chart showing an embodiment of the step S103 shown in Figure 1;

FIG. 5 is a flowchart of another method for delay compensation according to an embodiment of the present invention;

Figure 6 is a flow chart showing an embodiment of the step S204 shown in Figure 5;

FIG. 7 is a schematic diagram of full path delay compensation according to an embodiment of the present invention; FIG.

FIG. 8 is a schematic diagram of a packaged service according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a time frame format according to an embodiment of the present invention;

Figure 10 is a flow chart showing an embodiment of the step S205 shown in Figure 5;

FIG. 11 is a schematic structural diagram of a time delay compensation apparatus according to an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a master/backup compensation calculation module according to an embodiment of the present invention;

FIG. 13 is a schematic structural diagram of a master/backup compensation module according to an embodiment of the present disclosure; FIG. 14 is a schematic structural diagram of another time delay compensation apparatus according to an embodiment of the present invention; FIG. 15 is a schematic structural diagram of a full compensation calculation module according to an embodiment of the present invention;

16 is a schematic structural diagram of a full compensation module according to an embodiment of the present invention;

FIG. 17 is a schematic structural diagram of still another delay compensation apparatus according to an embodiment of the present invention. detailed description

BRIEF DESCRIPTION OF THE DRAWINGS The technical solutions in the embodiments of the present invention will be described in detail with reference to the accompanying drawings. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative work are within the scope of the present invention.

The delay compensation scheme of the embodiment of the present invention is applicable to various communication systems capable of carrying services, such as: WDM (Wavelength Division Multiplexing) communication system, OFDM (Orthogonal Frequency Division Multiplexing) ) Communication systems, etc. The first device is any device in the communication system; the second device is any device in the communication system that performs business interaction with the first device except the first device.

In order to ensure normal transmission of the service, a primary path and a backup path are usually provided between the first device and the second device. The full path between the first device and the second device includes: a path within the first device, a primary path or a standby path between the first device and the second device, and a path within the second device. In the embodiment of the present invention, the length of the transmission path of the primary path between the first device and the second device is the same, for example, in the WDM communication system, the first WDM device and the second WDM device are received. The length of the fiber in the direction is equal to the length of the fiber in the direction of the transmission, so that the transmission delay of the transmission path of the primary path is equal. The length of the transceiver channel of the backup path between the first device and the second device is the same. For example, in the WDM communication system, the length of the fiber in the receiving direction between the first WDM device and the second WDM device is equal to the length of the fiber in the sending direction. Therefore, the transmission delays of the transceiver channels of the standby path are equal. FIG. 1 is a flowchart of a method for compensating for a delay according to an embodiment of the present invention; the method may include the following steps S101 to S103.

S101. Perform time synchronization processing on the first device and the second device that perform service transmission.

In this step, time synchronization technologies such as 1588 clock synchronization technology and NTP (Network Time Protocol) synchronization technology can be used to input the first device and the second device for performing service transmission. Line synchronization processing. By performing synchronization processing between devices for service transmission, higher calculation accuracy of transmission delay can be obtained, thereby performing more accurate delay compensation.

5102. Calculate a primary and backup delay compensation value between the synchronized first device and the second device.

The delay of the active/standby path may be different due to the difference between the active and standby paths of the first device and the second device. Therefore, the delay of the primary or backup path is required to ensure the consistency of the delay between the active and standby paths. . In this step, the active/standby delay compensation value between the synchronized first device and the second device is calculated to implement delay compensation of the primary/secondary path.

5103. Perform delay compensation on the service transmitted by the primary path or the backup path between the first device and the second device by using the active/standby delay compensation value. In this step, the primary and secondary delay compensation values are used to compensate the delay of the service transmitted by the primary or secondary path between the first device and the second device. Referring to FIG. 2, it is a flowchart of the embodiment of step S102 shown in FIG. 1. The step S102 may specifically include the following steps S1201-S1205.

51201: Initiate transmission of the service from the first device, and when the transmission is performed to the second device by using the sending path of the primary path between the first device and the second device, the service is looped back from the second device by the primary device. The receiving channel of the path is transmitted to the first device;

Referring to FIG. 3, FIG. 3 is a schematic diagram of delay compensation of active and standby paths according to an embodiment of the present invention. In Figure 3, it is assumed that the AC is the originating channel of the primary path, and A'C' is the receiving channel of the primary path; BD is the outgoing channel of the standby path, and B and D are the receiving channels of the standby path. In this step, the service is transmitted from point A of the first device, transmitted to the point C of the second device by the AC, and then looped back to C from C, and transmitted to the A of the first device through C, A. The transmission route of the service is: ACC, -A, that is, the service is only transmitted in the main path.

51202. Calculate a path delay of the primary path according to a transmission time of the service in the primary path.

Since the service is composed of data of one frame and one frame, the transmission of the service is the sequential transmission of the frame data. Therefore, in this step, the path delay of the primary path can be calculated by the method of multiframe framing, path delay = frame header difference* Transmission time per frame of data + (length of transmission / frame length) * Transmission time of data per frame. Taking the diagram shown in Figure 3 as an example, the specific calculation process of this step is as follows:

It is assumed that the service includes 10 frames of data, and the frame header identifier of the frame data indicates the sequence number of the frame data. For example, the frame data with the frame header identifier of 1 indicates the first frame data of the service, and the frame data with the frame header identifier of 2 indicates the frame data. The second frame data of the service, and so on, the frame data with the frame header identifier of 10 represents the tail frame data of the service. The transmission time of each frame of data is 0.5 s, and the frame length of each frame of data is 512 bytes. When the service initiates transmission from point A, the frame data transmitted at this time is the first frame data, and the frame header identifier is 1; when the service loops back to A, when the first frame data reaches A, the sixth frame of the service is reached. The data is transmitted from point A, and has been transmitted 128 bytes. The frame header of the sixth frame data is identified as 6; using the multiframe framing method, the path delay of the main path obtained by this step is calculated = ( 6-1 ) *0.5+ ( 128/512 ) *0.5, This path delay is the transmission time of the service in the primary path. It should be noted that the calculation of the path delay by using the multi-frame framing method is only an example, and other calculation manners may also be used, for example: the time when the trial service initiates transmission from point A, and the time of loopback to A, point The time difference between the two, the transmission time of the service in the main path is obtained, thereby determining the path delay; and so on.

S203, the service is initiated from the first device, and the service is looped back from the second device to the second device by using The receiving channel of the path is transmitted to the first device;

Referring to FIG. 3 again, in this step, the service is initiated from point B of the first device, transmitted to the point D of the second device by the BD, and then returned from D to D, and then transmitted to the first through D, B. B of a device, point; then the transmission route of the service is: BDD, -B, that is, the service is only transmitted in the standby path.

51204. Calculate a path delay of the standby path according to the transmission time of the service in the backup path. For the calculation process of the step, refer to the calculation process of step S1202, and details are not described herein. Calculate the path delay of the obtained standby path as: .

S1205: Determine 1/2 of an absolute value of a path delay difference between the primary path and the standby path as a primary and secondary delay compensation value between the first device and the second device;

Since 1^=7 +7;=27 =27;, where, ! The transmission delay of the transmission channel of the primary path, and the transmission delay of the reception channel of the main path of T _r . =T _S '+T =2T _s '=2T , where T _S 'is the transmission channel delay of the main path and T is the transmission delay of the main path. The skew of the primary backup path ΔΤ = ΙΤ standby master -Τ _{l = l (T s + T} r) - (T s '+ T r') l = l2T s -2T s 'H2T r -2T r' l , ie: IT _s -T _s 'l=IT _r -T _r 'l=AT/2. For the same service, when the first device and the second device transmit, the transmission channel of the path is not used at the same time, for example, when the service is transmitted from the first device to the second device, the transmission channel of the primary path is transmitted to the second device. Or transmitting the transmission path to the second device; when the service is transmitted from the second device to the first device, the transmission channel is transmitted to the first device through the receiving channel of the primary path, or is transmitted to the first device through the receiving channel of the standby path . Therefore, the primary and backup delays between the first device and the second device are consistent, and only the primary path is required to be received/transmitted. The delay of the channel is the same as the delay of the receive/transmit channel of the standby path. In this step, 1/2 times ΔΤ is determined as the primary and backup delay compensation value between the first device and the second device. Referring to FIG. 4, it is a flowchart of the embodiment of step S103 shown in FIG. 1. The step S103 may specifically include the following steps S1301 - S1303.

51301. Compare the path delay of the primary path and the backup path between the first device and the second device. The active/standby delay compensation compensates for the delay of the path with a small path delay. Therefore, this step compares τ. _For the size of _Α , if τ _{Α is} greater, delay compensation for the alternate path is required; if τ _{Α is} less, delay compensation for the primary path is required.

If the path delay of the primary path is greater than the path delay of the standby path, the service transmitted in the standby path is delayed after the active/standby delay compensation value is output;

In this step, a FIFO buffer may be disposed at an exit of the standby path. Referring to the embodiment shown in FIG. 3, a FIFO buffer may be set at point D or point B; the service transmitted in the standby path is written. The FIFO buffer reads the service from the FIFO buffer when the master/slave delay compensation value is reached.

If the path delay of the standby path is greater than the path delay of the primary path, the service transmitted in the primary path is delayed by the primary and secondary delay compensation values.

In this step, a FIFO buffer may be disposed at an exit of the main path. Referring to the embodiment shown in FIG. 3, a FIFO buffer may be set at point C or A; the service transmitted in the main path is written. The FIFO buffer reads the service from the FIFO buffer when the master/slave delay compensation value is reached.

According to the description of the foregoing embodiment, the time delay compensation method of the present invention first performs time synchronization on the device for performing service transmission to ensure the accuracy of delay compensation; on the basis of time synchronization, the active/standby time between the computing devices is calculated. The delay value is used, and the delay of the service transmitted by the primary/secondary path between devices is compensated by the active/standby delay compensation value to ensure the symmetry of the delay of the active and standby paths. Referring to FIG. 5, it is a flowchart of another method for delay compensation according to an embodiment of the present invention; the method may include the following steps S201 to S205.

5201. Perform time synchronization processing on the first device and the second device that perform service transmission.

5202. Calculate a primary and secondary delay compensation value between the synchronized first device and the second device. S203: Perform delay compensation on the service transmitted by the primary path or the backup path between the first device and the second device by using the active/standby delay compensation value.

In this embodiment, step S201 to step S203 can be referred to step S101 to step S103 shown in FIG. 1 , and details are not described herein.

S204: Calculate a full path delay compensation value between the first device and the second device.

The full path between the first device and the second device includes: a path in the first device, a primary path or a standby path between the first device and the second device, and a path in the second device. Due to the processing of the service between the first device and the second device, the transmission of the service within the device also generates a transmission delay. When the entire path between the first device and the second device is used for service transmission, the full path needs to be performed. Delay compensation to ensure the consistency of the uplink and downlink delays of the full path.

5205. Perform the time delay compensation for the service of the full path transmission between the first device and the second device by using the full path delay compensation value. In this step, the full-path delay compensation value is used to delay the service of the full-path transmission between the first device and the second device, which ensures the consistency of the uplink and downlink delays of the full path. Referring to FIG. 6, FIG. 6 is a flowchart of an embodiment of step S204 shown in FIG. 5. The step S204 may specifically include the following steps S2401-S2409.

52401, the service is forwarded along the entire path between the first device and the second device. Referring to FIG. 7, FIG. 7 is a schematic diagram of full path delay compensation according to an embodiment of the present invention; The forward and reverse directions of the path are relative concepts. In the embodiment shown in Figure 7, if EACF is the forward path of the full path, F, -C, -A, -E, the reverse path of the full path Path; Conversely, if F, -C, -A, -E are the forward path of the full path, EACF is the reverse path of the full path. In this embodiment, E-A-C-F is the forward path of the full path, and F, -C, -A, and -E are the reverse path of the full path. In this step, the service is forwarded along the E-A-C-F. E is the forward entrance of the full path, and F is the forward exit of the full path.

52402: Encapsulate the service at a forward entrance of the full path, where the encapsulated service includes forward entry time information that the service reaches the forward entrance;

Please refer to FIG. 8 , which is a schematic diagram of a packaged service according to an embodiment of the present invention. The service at the forward entrance is encapsulated with the purpose of inserting entry time information for measuring the delay. In the embodiment shown in FIG. 8, the encapsulated service includes the following fields: frame header, entry time information, and back to the peer end. Deferred, reserved bytes and services. The "frame header" field is used to identify the frame header of the service, not the frame header of the frame data in the service. Please refer to FIG. 9 for a schematic diagram of the time frame format provided by the embodiment of the present invention; The "Entry Time Information" field and the "Return Peer Delay" field in the service can be defined by the frame format as shown in Figure 9. In this step, when the service is encapsulated at the forward entry E of the full path, Inserting the forward entry time information of the service to the forward entry E in the field of "entry time information"

52403, obtaining forward exit time information that the service reaches the forward exit of the full path, and decapsulating the service at the forward exit, extracting the forward entry time information; When the forward exit F of the full path is reached, the forward exit time information t _{2 is obtained} , and the service is decapsulated, and the forward entry time information is extracted from the field of the "entry time information".

52404, calculating a forward delay of the full path according to the forward entry time information and the forward exit time information;

In this step, the forward delay of the full path is the time difference between the forward exit time and the forward entry time, that is, the forward delay T _d = 112-1^.

52405, the service is reversely transmitted along the entire path between the first device and the second device; in this step, the service is reversely transmitted along the F, -C, -A, and -E shown in FIG. 7, F, For the reverse entry of the full path, E' is the reverse exit of the full path.

52406. Encapsulate the service at a reverse entry of the full path, where the encapsulated service includes reverse entry time information that the service arrives at the reverse entry and a forward time of the full path Delay

Encapsulating the service at the reverse entrance, the purpose of which is to insert the entry time information for measuring the delay and the back-to-back delay (ie, the forward delay). For the encapsulation process of the service in this step, refer to step S2402, and details are not described herein. In this step, when the service is encapsulated at the reverse entry F of the full path, the reverse entry time information t ₃ at which the service arrives at the forward entry F is inserted in the field of "entry time information", and Insert a forward delay T _d in the field of "Return to peer delay".

52407: Obtain reverse exit time information that the service reaches the reverse exit of the full path, and decapsulate the service at the reverse exit, extract the reverse entry time information, and Positive delay of the full path;

When the service reaches the reverse exit E of the full path, the forward exit time information t _{4 is obtained} , and the service is decapsulated, and the forward entry time information t ₃ is extracted from the field of the "entry time information", from " Back The forward delay T _d is extracted from the field of the peer delay.

52408. Calculate, according to the reverse entry time information and the reverse exit time information, a reverse delay of the full path.

In this step, the reverse delay of the full path is the time difference between the reverse exit time and the reverse entry time, that is, the reverse delay T _d '=t ₄ -t ₃ .

52409. Determine an absolute value of a delay difference between the forward delay and the reverse delay of the full path as a full path delay compensation value between the first device and the second device.

Delay difference between forward delay and reverse delay of full path

Tt, this step determines Δ1 as the full path delay compensation value between the first device and the second device.

It should be noted that, the foregoing step S2401 - step S2409 is described by taking the schematic diagram shown in FIG. 7 as an example, wherein the full path is: a path in the first device, a main path between the first device and the second device, and a second device The internal path can be ensured by the embodiment shown in FIG. 1 to FIG. 4, and the symmetry of the active/standby path between the first device and the second device is ensured, so when the full path is: the first device path, the second device and For a backup path between the second device and the path in the second device, refer to the similar analysis in the above steps S2401 to S2409, and details are not described herein. Referring to FIG. 10, it is a flowchart of the embodiment of step S205 shown in FIG. 5. The step S205 may specifically include the following steps S2501-step S2503.

52501. Compare a forward delay and a reverse delay of a full path between the first device and the second device;

The full path delay compensation needs to compensate the delay of the transmission path with a small path delay. Therefore, this step compares the magnitude of the forward delay T _d and the reverse delay T _d ', if T _{d is} greater than T _d ', Therefore, delay compensation is needed for the reverse path of the full path; if T _{d is} less than T _d ', delay compensation is needed for the forward path of the full path.

52502. If the forward delay is greater than the reverse delay, delay the service of the reverse transmission in the full path by delaying the full path delay compensation value;

In this step, a FIFO buffer may be disposed at a reverse exit of the full path; a service that is reversely transmitted in the full path is written into the FIFO buffer, when the full path delay compensation value is reached Reading the service from the FIFO buffer.

52503. If the reverse delay is greater than the forward delay, forward transmission in the full path The service is delayed after the full path delay compensation value is output.

In this step, a FIFO buffer may be disposed at a forward exit of the full path; a service that is forwardly transmitted in the full path is written into the FIFO buffer, and when the full path delay compensation value is reached, The service is read from the FIFO buffer.

According to the description of the foregoing embodiment, the time delay compensation method of the present invention first performs time synchronization on the device for performing service transmission to ensure the accuracy of delay compensation; on the basis of time synchronization, the active/standby time between the computing devices is calculated. The delay value is used, and the delay of the service transmitted by the primary/secondary path between the devices is compensated by the active/standby delay compensation value to ensure the symmetry of the delay of the active and standby paths. It can also realize the symmetry of the upper and lower delays of the full path between devices to ensure the normal transmission of services. The embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium can store a program, and the program includes some or all of the steps of the delay compensation method described in the foregoing method embodiments.

A delay compensation device according to an embodiment of the present invention will be described in detail below with reference to FIG. 11 to FIG. 17. It should be noted that the following device may be applied to the foregoing method embodiments to provide an embodiment of the present invention. Time delay compensation method.

FIG. 11 is a schematic structural diagram of a time delay compensation apparatus according to an embodiment of the present invention; the apparatus may include: a synchronization module 101, an active/standby compensation calculation module 102, and an active/standby compensation module 103.

The synchronization module 101 is configured to perform time synchronization processing on the first device and the second device that perform service transmission;

The synchronization module 101 can perform synchronization processing on the first device and the second device that perform service transmission, such as the 1588 clock synchronization technology and the NTP synchronization technology. By performing synchronization processing between the devices transmitted by the service, higher calculation accuracy of the transmission delay can be obtained, thereby performing more accurate delay compensation.

The active/standby compensation calculation module 102 is configured to calculate a master/slave delay compensation value between the synchronized first device and the second device;

The delay of the active/standby path may be different due to the difference between the active and standby paths of the first device and the second device. Therefore, the delay of the primary or backup path is required to ensure the consistency of the delay between the active and standby paths. . The active/standby compensation calculation module 101 calculates a synchronization between the first device and the second device. The active and standby delay compensation values are used to implement delay compensation for the active/standby path.

The active/standby compensation module 103 is configured to perform time delay compensation on the service transmitted by the primary path or the backup path between the first device and the second device by using the active/standby delay compensation value. The active/standby compensation module 103 uses the active/standby delay compensation value to delay the service transmitted by the primary or secondary path between the first device and the second device to ensure the consistency of the delay between the active and standby paths. FIG. 12 is a schematic structural diagram of an active/standby compensation calculation module according to an embodiment of the present invention; the active/standby compensation calculation module 102 may include: a primary transmission unit 1201, a primary delay calculation unit 1202, a backup transmission unit 1203, and a standby time. The calculation unit 1204 and the active/standby compensation determination unit 1205.

The primary transmission unit 1201 is configured to initiate a transmission from the first device, and when the transmission channel of the primary path between the first device and the second device is transmitted to the second device, the service is looped back from the second device. Transmitting to the first device via the receiving channel of the primary path;

The main delay calculation unit 1202 is configured to calculate a path delay of the primary path according to a transmission time of the service in the primary path.

The backup transmission unit 1203 is configured to initiate a transmission from the first device, and when the transmission path of the backup path between the first device and the second device is transmitted to the second device, the service is looped back from the second device. Transmitting to the first device via the receiving channel of the standby path;

The backup delay calculation unit 1204 is configured to calculate a path delay of the standby path according to a transmission time of the service in the backup path.

The active/standby compensation determining unit 1205 is configured to determine 1/2 of the absolute value of the path delay difference between the primary path and the standby path as the primary and backup delay compensation values between the first device and the second device. . FIG. 13 is a schematic structural diagram of a master-slave compensation module according to an embodiment of the present invention; the master-slave compensation module 103 may include: a comparison unit 1301 and a master-slave compensation unit 1302.

The comparing unit 1301 is configured to compare a size of a path delay between the primary path and the standby path between the first device and the second device.

The active/standby delay compensation is to delay the path with a small path delay. Therefore, the comparing unit 1301 compares the path delay of the primary path with the path delay of the standby path, and if the path delay of the primary path If the path delay of the backup path is greater than the path delay of the standby path, if the path delay of the primary path is smaller than the path delay of the standby path, delay compensation is required for the primary path. The active/standby compensation unit 1302 is configured to: after the path delay of the primary path is greater than the path delay of the standby path, delay the service transmitted in the standby path by delaying the primary and secondary delay compensation values; or And a compensation unit, configured to: if the path delay of the standby path is greater than the path delay of the primary path, delay the service transmitted in the primary path by delaying the primary and secondary delay compensation values.

The active/standby compensation unit 1302 may set a FIFO buffer at an exit of a path that needs to perform delay compensation, and write the traffic transmitted in the path to the FIFO buffer, when the active/standby delay compensation is reached. In the case of the value, the service is read out from the FIFO buffer to implement delaying the output of the active and standby delay compensation values, and the active/standby delay compensation is implemented. FIG. 14 is a schematic structural diagram of another delay compensation device according to an embodiment of the present invention; the device may include: a synchronization module 101, a master compensation calculation module 102, a master compensation module 103, and a full compensation calculation module 104. And full compensation module 105. For the structure of the synchronization module 101, the active/standby compensation calculation module 102, and the active/standby compensation module 103, reference may be made to the related description in the embodiment shown in FIG. 11 to FIG. 13, which is not described herein.

The full compensation calculation module 104 is configured to calculate a full path delay compensation value between the first device and the second device, where the full path between the first device and the second device includes: a path within the first device, and a first a primary path or a secondary path between the device and the second device, and a path within the second device;

Due to the processing of the service between the first device and the second device, the transmission of the service within the device also generates a transmission delay. When the entire path between the first device and the second device is used for service transmission, the full path needs to be performed. Delay compensation to ensure the consistency of the uplink and downlink delays of the full path.

The full compensation module 105 is configured to perform time delay compensation on the service transmitted between the first device and the second device by using the full path delay compensation value. The full compensation module 105 uses the full path delay compensation value to delay the service of the full path transmission between the first device and the second device, and ensures the consistency of the uplink and downlink delays of the entire path. FIG. 15 is a schematic structural diagram of a full compensation calculation module according to an embodiment of the present invention; the full compensation calculation module 104 may include: a forward processing unit 1401, a forward delay calculation unit 1402, a reverse processing unit 1403, and a reverse The delay calculation unit 1404 and the full compensation determination unit 1405.

The forward processing unit 1401 is configured to forward the service along the entire path between the first device and the second device, and encapsulate the service at the forward entrance of the full path, where the service is encapsulated. Included with the forward entry time information that the service arrives at the forward entrance; obtain the forward exit time information that the service reaches the forward exit of the full path, and at the forward exit The service performs decapsulation, and extracts the forward entry time information;

The forward delay calculation unit 1402 is configured to calculate a forward delay of the full path according to the forward entry time information and the forward exit time information;

The reverse processing unit 1403 is configured to perform reverse transmission of the service along the entire path between the first device and the second device, and encapsulate the service at the reverse entry of the full path, in the encapsulated service. And including a reverse entry time information of the service reaching the reverse entry and a forward delay of the full path; obtaining reverse exit time information that the service reaches the reverse exit of the full path, and Decapsulating the service at the reverse exit, extracting the reverse entry time information and a forward delay of the full path;

The reverse delay calculation unit 1404 is configured to calculate a reverse delay of the full path according to the reverse entry time information and the reverse exit time information;

The full compensation determining unit 1405 is configured to determine an absolute value of the delay difference between the forward delay and the reverse delay of the full path as a full path delay compensation value between the first device and the second device. Referring to FIG. 16, a schematic structural diagram of a full compensation module according to an embodiment of the present invention; the full compensation module 105 may include: a comparison unit 1501 and a full compensation unit 1502.

The comparing unit 1501 is configured to compare a size of a forward delay and a reverse delay of the full path between the first device and the second device;

The full-path delay compensation needs to compensate the delay of the transmission path with a small path delay. Therefore, this step compares the forward delay and the reverse delay. If the forward delay is greater than the reverse delay, you need to Delay compensation is performed on the reverse path of the full path; if the forward delay is less than the reverse delay, delay compensation of the forward path of the full path is required.

a full compensation unit 1502, configured to delay, after the forward delay is greater than the reverse delay, the service that is reversely transmitted in the full path is delayed after the full path delay compensation value; or, if When the reverse delay is greater than the forward delay, the forward transmission service in the full path is delayed after the full path delay compensation value is output.

The full compensation unit 1502 may set a FIFO buffer at an exit of a path that requires delay compensation, and write the traffic transmitted in the path to the FIFO buffer, when the full path is reached. When the compensation value is extended, the service is read out from the FIFO buffer to implement output after delaying the full path delay compensation value, and the active/standby delay compensation is implemented.

It should be noted that the structure and function of the time delay compensation device shown in FIG. 11 to FIG. 16 can be specifically implemented according to the method in the method embodiment shown in FIG. 1 to FIG. 15 , and the specific implementation process can refer to the foregoing method.

FIG. 17 is a schematic structural diagram of still another time delay compensation apparatus according to an embodiment of the present invention; the apparatus may include: a transmitter, a receiver, and a processor; wherein the processor performs the following steps: Transmitting the first device and the second device for time synchronization processing;

In a possible implementation manner of the embodiment of the present invention:

The step of the processor performing the step of calculating the active/standby delay compensation value between the first device and the second device after the synchronization includes the following steps:

Calculating a path delay of the standby path according to a transmission time of the service in the standby path; determining, as a first half of an absolute value of a path delay difference between the primary path and the standby path, The active and standby delay compensation values between a device and a second device.

In another possible implementation manner of the embodiment of the present invention:

When the processor performs the step of performing time delay compensation on the service transmitted by the primary path or the backup path between the first device and the second device by using the active/standby delay compensation value, the processor specifically includes the following steps: a path delay of the primary path and the standby path between the first device and the second device; if the path delay of the primary path is greater than the path delay of the standby path, the standby path is The service transmitted in the delay is output after delaying the primary and secondary delay compensation values;

In yet another possible implementation manner of the embodiment of the present invention:

When the processor performs the step of outputting the service transmitted in the backup path after delaying the primary and backup delay compensation values, the processor specifically includes the following steps:

Setting a FIFO buffer at an exit of the standby path;

Setting a FIFO buffer at an exit of the main path;

After the processor performs the step of performing delay compensation on the service transmitted by the primary path or the backup path between the first device and the second device by using the active/standby delay compensation value, performing the following steps: a full path delay compensation value between the first device and the second device, the full path between the first device and the second device includes: a path within the first device, and a master between the first device and the second device a path or a standby path, and a path within the second device;

When the processor performs the step of calculating a full path delay compensation value between the first device and the second device, the method specifically includes the following steps:

Obtaining the forward exit time information that the service reaches the forward exit of the full path, and decapsulating the service at the forward exit, and extracting the forward entry time information; Calculating a forward delay of the full path according to the forward entry time information and the forward exit time information;

When the processor performs the step of performing time delay compensation on the service transmitted between the first device and the second device by using the full path delay compensation value, the processor specifically includes the following steps:

When the processor performs the step of outputting the reverse-transferred service in the full path after delaying the full-path delay compensation value, the processor specifically includes the following steps:

Setting a FIFO buffer at a reverse exit of the full path;

Setting a FIFO buffer at a forward exit of the full path;

Transmitting the forward-transmitted traffic in the full path to the FIFO buffer, when the full path is reached When the delay compensation value is obtained, the service is read from the FIFO buffer.

According to the description of the foregoing embodiment, the time delay compensation method of the present invention first performs time synchronization on the device for performing service transmission to ensure the accuracy of delay compensation; on the basis of time synchronization, the active/standby time between the computing devices is calculated. The delay value is used, and the delay of the service transmitted by the primary/secondary path between the devices is compensated by the active/standby delay compensation value to ensure the symmetry of the delay of the active and standby paths. It can also realize the symmetry of the upper and lower delays of the full path between devices to ensure the normal transmission of services.

Through the description of the above embodiments, those skilled in the art can clearly understand that the various embodiments can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware. Based on such understanding, the above-described technical solutions may be embodied in the form of software products in essence or in the form of software products, which may be stored in a computer readable storage medium such as ROM/RAM, magnetic Discs, optical discs, etc., include instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments or portions of the embodiments.

The above-described embodiments do not constitute a limitation on the scope of protection of the technical solutions. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the above-described embodiments are intended to be included within the scope of the technical solution.

Claims

Rights request

A delay compensation method, characterized in that:

The method according to claim 1, wherein the calculating the active/standby delay compensation value between the synchronized first device and the second device includes:

When the service is initiated from the first device and transmitted to the second device through the sending path of the primary path between the first device and the second device, the service is looped back from the second device, and the primary path is The receiving channel is transmitted to the first device;

The method according to claim 2, wherein the delay compensation of the service transmitted by the primary path or the backup path between the first device and the second device is performed by using the active/standby delay compensation value The method includes: comparing a path delay of the primary path and the backup path between the first device and the second device; if the path delay of the primary path is greater than the path delay of the standby path, The service transmitted in the path is delayed after the active/standby delay compensation value is output;

If the path delay of the standby path is greater than the path delay of the primary path, the service transmitted in the primary path is delayed after the active/standby delay compensation value is output. The method of claim 3, wherein the outputting the service transmitted in the standby path after the delay of the active/standby delay compensation value comprises:

Setting a first-in first-out FIFO buffer at an exit of the standby path;

The method according to any one of claims 1-4, wherein the using the primary and backup delay compensation values to transmit the primary path or the standby path between the first device and the second device After the business delays compensation, it also includes:

The method of claim 5, wherein the calculating the full path delay compensation value between the first device and the second device comprises:

Reversely transmitting the service along the full path between the first device and the second device, where the full path Encapsulating the service at a reverse entry, where the encapsulated service includes reverse entry time information of the service reaching the reverse entry and a forward delay of the full path;

The method according to claim 6, wherein the using the full path delay compensation value to delay the service of the full path transmission between the first device and the second device includes:

The method according to claim 7, wherein the outputting the reverse-transferred traffic in the full path after the delay of the full-path delay compensation value comprises:

Setting a FIFO buffer at a reverse exit of the full path;

Setting a FIFO buffer at a forward exit of the full path;

The traffic forwarded in the full path is written to the FIFO buffer, and when the full path delay compensation value is reached, the service is read from the FIFO buffer. Delay compensation device, characterized in that a synchronization module, configured to perform time synchronization processing on the first device and the second device that perform service transmission; and an active/standby compensation calculation module, configured to calculate a primary and backup delay compensation value between the synchronized first device and the second device ;

The apparatus according to claim 9, wherein the active/standby compensation calculation module comprises: a primary transmission unit, configured to initiate a transmission from a first device, between the first device and the second device When the transmission path of the primary path is transmitted to the second device, the service is looped back from the second device, and is transmitted to the first device through the receiving channel of the primary path;

a backup transmission unit, configured to initiate a transmission from the first device, and when the transmission path of the backup path between the first device and the second device is transmitted to the second device, the service is looped back from the second device. Transmitting to the first device via the receiving channel of the standby path;

The apparatus according to claim 10, wherein the active/standby compensation module comprises: a comparing unit, configured to compare a path delay of a primary path and a standby path between the first device and the second device ;

And an active/standby compensation unit, configured to: after the path delay of the primary path is greater than the path delay of the standby path, delay the service transmitted in the standby path by delaying the primary and secondary delay compensation values; or The compensation unit is configured to: if the path delay of the standby path is greater than the path delay of the primary path, delay the service transmitted in the primary path by delaying the primary and secondary delay compensation values. The apparatus according to claim 11, wherein the active/standby compensation unit is specifically configured to: if a path delay of the primary path is greater than a path delay of the standby path, at an exit of the standby path Setting a first-in first-out FIFO buffer, writing the traffic transmitted in the backup path to the FIFO buffer, and when the primary/standby delay compensation value is reached, reading the service from the FIFO buffer; Or, if a path delay of the standby path is greater than a path delay of the primary path, setting a FIFO buffer at an exit of the primary path, and writing a service transmitted in the primary path to the FIFO a buffer, when the master/slave delay compensation value is reached, reading the service from the FIFO buffer.

13. The apparatus according to any one of claims 9 to 12, further comprising:

The full compensation module is configured to perform delay compensation on the service transmitted between the first device and the second device by using the full path delay compensation value.

The device according to claim 13, wherein the full compensation calculation module comprises: a forward processing unit, configured to forward the service along the full path between the first device and the second device, Encapsulating the service at a forward path of the full path, where the encapsulated service includes forward entry time information that the service arrives at the forward entry; acquiring the service to the full path Forward export time information at the forward exit, and decapsulating the service at the forward exit to extract the forward entry time information;

a reverse delay calculation unit, configured to use the reverse entry time information and the reverse exit time information, Calculating a reverse delay of the full path;

The device according to claim 14, wherein the full compensation module comprises: a comparing unit, configured to compare a forward delay and a reverse delay of a full path between the first device and the second device the size of;

The device according to claim 15, wherein the full compensation unit is specifically configured to: if the forward delay is greater than the reverse delay, set at a reverse exit of the full path a FIFO buffer, writes the reversely transmitted traffic in the full path to the FIFO buffer, and when the full path delay compensation value is reached, reads the service from the FIFO buffer; or

And if the reverse delay is greater than the forward delay, setting a FIFO buffer at a forward exit of the full path, and writing a forward-transmitted service in the full path to the FIFO buffer, When the full path delay compensation value is reached, the traffic is read from the FIFO buffer.

17. A computer storage medium, characterized by:

The computer storage medium can store a program that, when executed, includes the steps of any of claims 1-8.

18. A delay compensation apparatus, comprising: a transmitter, a receiver, and a processor; wherein the processor performs the following steps:

The time delay compensation is performed on the service transmitted by the primary path or the backup path between the first device and the second device by using the active/standby delay compensation value. The device according to claim 18, wherein the step of performing the step of calculating the active/standby delay compensation value between the first device and the second device after the synchronization is performed, specifically includes the following steps :

The device according to claim 19, wherein the processor performs the transmission of the primary or secondary delay compensation value to the primary path or the backup path between the first device and the second device. When the service performs the step of delay compensation, the following steps are specifically included:

The device according to claim 20, wherein the processor performs the step of outputting the service transmitted in the backup path after delaying the active/standby delay compensation value, and specifically includes the following steps. :

Setting a first-in first-out FIFO buffer at an exit of the standby path; Transmitting the traffic transmitted in the backup path to the FIFO buffer, and when the primary and backup delay compensation values are reached, reading the service from the FIFO buffer;

Setting a FIFO buffer at an exit of the main path;

The device according to any one of claims 18 to 21, wherein the processor performs the main path between the first device and the second device by using the active/standby delay compensation value. After the step of delay compensation for the service transmitted by the backup path, the following steps are also performed:

The device according to claim 22, wherein the processor performs the step of calculating a full path delay compensation value between the first device and the second device, specifically comprising the following steps: Performing forward transmission along a full path between the first device and the second device, and encapsulating the service at a forward entrance of the full path, where the encapsulated service includes the service reaching the forward entrance Positive entry time information at the place;

Obtaining the reverse exit time information that the service arrives at the reverse exit of the full path, and Decapsulating the service at the reverse egress, extracting the reverse entry time information and a forward delay of the full path;

The device according to claim 23, wherein the processor performs the delay compensation of the service transmitted between the first device and the second device by using the full path delay compensation value. The steps include the following steps:

The device according to claim 24, wherein the processor performs the step of outputting the reverse-transferred service in the full path after delaying the full-path delay compensation value, and specifically includes: The following steps:

Setting a FIFO buffer at a reverse exit of the full path;

Setting a FIFO buffer at a forward exit of the full path;