CN109005557A

CN109005557A - A kind of time delay symmetry measurement method, device and system

Info

Publication number: CN109005557A
Application number: CN201811123805.XA
Authority: CN
Inventors: 宋高前; 陈成满
Original assignee: Nanjing ZTE New Software Co Ltd
Current assignee: ZTE Corp
Priority date: 2018-09-26
Filing date: 2018-09-26
Publication date: 2018-12-14
Anticipated expiration: 2038-09-26
Also published as: WO2020063593A1; CN109005557B

Abstract

The embodiment of the invention discloses a kind of time delay symmetry measurement method, device and system, the time delay symmetry measurement method, which includes: the first equipment, sends first time information to the second equipment；First equipment receives the second temporal information that second equipment is sent, and obtains third temporal information；Wherein, second temporal information is that the second equipment sends the temporal information of the second temporal information and the sum of the delayed data of the first equipment to the second equipment, the delayed data of first equipment to the second equipment is that second equipment obtains the temporal information of the first time information and the difference of the first time information, the third temporal information is the temporal information that first equipment obtains second temporal information, the delayed data of second equipment to first equipment is the difference for the temporal information that the third temporal information and second equipment send second temporal information.The embodiment of the present invention, which realizes, measures the time delay symmetry of equipment, to adapt to the business transmitting scene for having strict demand to time delay symmetry.

Description

A kind of time delay symmetry measurement method, device and system

Technical field

The present embodiments relate to but be not limited to the communications field, espespecially a kind of time delay symmetry measurement method, device and be System.

Background technique

Traditional 2G, 3G, 4G return network are divided into access layer, convergence layer, backbone aggregation layer, core layer, and the 4G epoch introduce Novel radio accesses net (C-RAN, Centralized Radio Access Network) forward pass network.The 5G epoch, due to nothing Line frequency spectrum resource is promoted and extensive (Massive) multiple-input, multiple-output (MIMO, Multiple Input Multiple Output) The development of antenna technology, conventional wireless access the common public radio under net (RAN, Radio Access Network) framework Interface (CPRI, Common Public Radio Interface) interface is difficult to carry huge bandwidth, needs to carry out framework weight Structure.After reconstruct, baseband processing unit (BBU, Building Base Unit) function of 5G will be divided into centralized unit (CU, Centralized Unit) and two functional entitys of distributed unit (DU, Distribute Unit), 5GC-RAN will be wrapped Forward pass containing level-one (Remote Radio Unit (RRU, Radio Remote Unit)-DU) and two level framework of second level forward pass (DU-CU). The cutting of CU and DU function is distinguished with the real-time of process content, and CU equipment mainly includes non real-time wireless upper-layer protocol Stack function, while the also deployment of support section core net function (UP) sinking and edge application business, and DU equipment is then mainly located Manage the L2 function of physical layer function and real-time demand.

On the other hand, the 5G epoch are due to new technologies such as carrier wave polymerization, multi-point cooperative, the ultrashort frame structure of 5G, high accuracy positionings Application, it is desirable that meet the superhigh precision of hundred nanoseconds between base station, transmission network need to have the time of higher precision at the same time Transfer capability especially has the business transmitting scene of strict demand to time delay symmetry.

Summary of the invention

The embodiment of the invention provides a kind of time delay symmetry measurement methods, device and system, can be to the time delay of equipment Symmetry is measured and is compensated, to adapt to the business transmitting scene for having strict demand to time delay symmetry.

The embodiment of the invention provides a kind of time delay symmetry measurement methods, comprising:

First equipment sends first time information to the second equipment；

First equipment receives the second temporal information that second equipment is sent, and obtains third temporal information；

Wherein, second temporal information be the second equipment send the second temporal information temporal information and the first equipment to The sum of the delayed data of second equipment, the delayed data of first equipment to second equipment are second equipment acquisition The difference of the temporal information of the first time information and the first time information, the third temporal information set for described first The standby temporal information for obtaining second temporal information, the delayed data of second equipment to first equipment are described the Three temporal informations and second equipment send the difference of the temporal information of second temporal information；

First equipment carries out the compensation of time delay symmetry according to second temporal information and the third temporal information.

In embodiments of the present invention, described that the compensation of time delay symmetry is carried out according to the second temporal information and third temporal information Include:

When first equipment obtains n second temporal informations and the n corresponding third temporal informations, institute The maximum value and minimum value in n second temporal informations of the first equipment rejecting are stated, the n corresponding third times are rejected The maximum value and minimum value of information；Calculate the average value of second temporal information and the average value of the third temporal information； The compensation of time delay symmetry is carried out according to the average value of second temporal information and the average value of the third temporal information；Its In, n is the integer more than or equal to 3.

In embodiments of the present invention, first equipment includes: to the second equipment transmission first time information

The first kind specific identifier code block sent in code stream is replaced with the second class specific identifier code block by first equipment, The first time information is carried in part or all of third class specific identifier code block and is sent to second equipment；Its In, third class specific identifier code block includes at least one of: the second class specific identifier code block, S identify code block；

First equipment receives the second temporal information that the second equipment is sent

The third class specific identifier code block that the first equipment parsing receives in code stream obtains the second temporal information.

In embodiments of the present invention, first equipment carries first in part or all of third class specific identifier code block Temporal information is simultaneously sent to the second equipment and includes:

The sequence number of local sequence is added 1 when first equipment often encounters a third class specific identifier code block； Alternatively, the sequence number of the local sequence is added 1 when K code is effectively designated as the first default indicated value by first equipment；

First equipment obtains the first time information in the first preset value of Serial No. of local sequence, at this The first time letter is carried when the first preset value of Serial No. of ground sequence in the corresponding third class specific identifier code block It ceases and is sent to second equipment.

In embodiments of the present invention, described in first equipment is obtained in the first preset value of Serial No. of local sequence After first time information, this method further include:

The first equipment calculating cyclic redundancy check code, in the first preset value of Serial No. of the local sequence pair The first time information and the cyclic redundancy check code are carried in the third class specific identifier code block answered and are sent to Second equipment.

In embodiments of the present invention, the first kind specific identifier code block includes at least one of: T identifies code block and S The free message identified between code block identifies code block, K code；

The second class specific identifier code block includes at least one of: O identifies code block, S identifies code block.

The embodiment of the present invention proposes a kind of time delay symmetry measurement method, comprising:

Second equipment receives the first time information that the first equipment is sent, and obtains the 4th temporal information；Wherein, the described 4th Temporal information is the temporal information that second equipment obtains the first time information；

Second equipment calculates first equipment according to the 4th temporal information and the first time information and arrives The delayed data of second equipment；

Second equipment judge first equipment to second equipment delayed data validity, prolong when described When information it is effective when, second equipment to first equipment send the second temporal information；

Wherein, second temporal information be send second temporal information temporal information and first equipment to The sum of the delayed data of second equipment.

In embodiments of the present invention, the first time information of the second equipment reception the first equipment transmission includes:

The third class specific identifier code block that the second equipment parsing receives in code stream obtains the first time information；

Second equipment sends the second temporal information to the first equipment

The first kind specific identifier code block sent in code stream is replaced with the second class specific identifier code block by second equipment, The second temporal information is carried in part or all of third class specific identifier code block and is sent to first equipment；Wherein, Three classes specific identifier code block includes at least one of: the second class specific identifier code block, S identify code block.

In embodiments of the present invention, second equipment parsing receives the third class specific identifier code block in code stream and obtains the Before one temporal information, this method further include:

Second equipment carries out cyclic redundancy check code verification to the third class specific identifier code block, after verification passes through It parses the third class specific identifier code block and obtains the first time information.

In embodiments of the present invention, described to carry the second temporal information in part or all of third class specific identifier code block And it sends and includes:

The sequence number of local sequence is added 1 when second equipment often encounters a third class specific identifier code block； Alternatively, the sequence number of the local sequence is added 1 when K code is effectively designated as the second default indicated value by second equipment；

Second equipment is obtained in the second preset value of Serial No. of local sequence sends second temporal information Temporal information, carried in the corresponding third class specific identifier code block in the second preset value of Serial No. of local sequence Second temporal information is simultaneously sent to first equipment.

First equipment sends first time information to the second equipment；

First equipment receives the 5th temporal information that second equipment is sent, and obtains third temporal information；Wherein, the 5th Temporal information includes: the temporal information and second equipment transmission the described 5th that the second equipment obtains the first time information The temporal information of temporal information, the third temporal information are the time letter that first equipment obtains the 5th temporal information Breath；

First equipment calculate second equipment obtain the first time information temporal information and the first time First difference of information and the third temporal information and second equipment send the time letter of the 5th temporal information Second difference of breath.

In embodiments of the present invention, this method further include:

First equipment carries out the compensation of time delay symmetry according to first difference and second difference.

In embodiments of the present invention, first equipment carries out time delay symmetry according to the first absolute value and the second absolute value Compensation includes:

When first equipment obtains n first differences and n corresponding second differences, n institute is rejected The maximum value and minimum value in the first difference are stated, the maximum value and minimum value of n corresponding second differences are rejected；Calculate institute State the average value of the first difference and the average value of second difference；According to the average value of first difference and described second poor The average value of value carries out the compensation of time delay symmetry；Wherein, n is the integer more than or equal to 1.

In embodiments of the present invention, the 5th temporal information further includes first time information.

The first kind specific identifier code block sent in code stream is replaced with the second class specific identifier code block by the first equipment, in portion Point or whole third class specific identifier code block in carry first time information and be sent to second equipment；Wherein, third class Specific identifier code block includes at least one of: the second class specific identifier code block, S identify code block；

First equipment receives the 5th temporal information that the second equipment is sent

The third class specific identifier code block that the parsing of first equipment receives in code stream obtains the 5th temporal information.

Second equipment sends the 5th temporal information to the first equipment；Wherein, the 5th temporal information includes: the described 4th Information and the temporal information for sending the 5th temporal information.

In embodiments of the present invention, after the 4th temporal information of the acquisition, this method further include:

Second equipment judges the validity of the first time information and the 4th temporal information；

It is special in partly or entirely described second class when the first time information and effective the 4th temporal information Calibration, which is known, to be carried the 5th temporal information in code block and is sent to first equipment.

In embodiments of the present invention, the first time information of the second equipment reception the second equipment transmission includes:

The third class specific identifier code block that the second equipment parsing receives in code stream obtains first time information；

Second equipment sends the 5th temporal information to the first equipment

The first kind specific identifier code block sent in code stream is replaced with the second class specific identifier code block by second equipment, The 5th temporal information is carried in part or all of third class specific identifier code block and is sent to first equipment；Wherein, Three classes specific identifier code block includes at least one of: the second class specific identifier code block, S identify code block.

The embodiment of the present invention proposes a kind of time delay symmetry measuring device, including processor and computer-readable storage medium Matter is stored with instruction in the computer readable storage medium, when described instruction is executed by the processor, realizes above-mentioned A kind of time delay symmetry measurement method.

The embodiment of the present invention proposes a kind of computer readable storage medium, is stored thereon with computer program, the meter Calculation machine program realizes the step of any of the above-described kind of time delay symmetry measurement method when being executed by processor.

The embodiment of the present invention proposes a kind of time delay symmetry measuring system, comprising:

First equipment, for sending first time information to the second equipment；The second temporal information is received, the third time is obtained Information；Wherein, second temporal information is temporal information and the first equipment that the second equipment sends the second temporal information to the The delayed data of the sum of the delayed data of two equipment, first equipment to second equipment obtains institute for second equipment The temporal information of first time information and the difference of the first time information are stated, the third temporal information is first equipment The temporal information of second temporal information is obtained, the delayed data of second equipment to first equipment is the third Temporal information and second equipment send the difference of the temporal information of second temporal information；

Second equipment obtains the 4th temporal information for receiving the first time information of the first equipment transmission；Wherein, institute Stating the 4th temporal information is the temporal information that second equipment obtains the first time information；Believed according to the 4th time Breath and the first time information calculate first equipment to the delayed data of second equipment；The is sent to the first equipment Two temporal informations；Wherein, second temporal information is to send the temporal information and delay letter of second temporal information The sum of breath.

First equipment, for sending first time information to the second equipment；Receive the 5th time letter of the second equipment transmission Breath obtains third temporal information；Wherein, the 5th temporal information includes: the time that the second equipment obtains the first time information Information and second equipment send the temporal information of the 5th temporal information, and the third temporal information sets for described first The standby temporal information for obtaining the 5th temporal information；Calculate the time that second equipment receives the first time information The first difference and the third temporal information of information and the first time information and second equipment send described the Second difference of the temporal information of five temporal informations；Time delay symmetry benefit is carried out according to first difference and second difference It repays；

Second equipment obtains the 4th temporal information for receiving the first time information of the first equipment transmission；Wherein, institute Stating the 4th temporal information is the temporal information that second equipment obtains the first time information；The 5th is sent to the first equipment Temporal information；Wherein, the 5th temporal information includes: the 4th information and the temporal information for sending the 5th temporal information.

The embodiment of the present invention includes: the first equipment sends first time information to the second equipment；First equipment receives second The second temporal information that equipment is sent obtains third temporal information；Wherein, second temporal information is that the second equipment sends the The sum of the delayed data of the temporal information of two temporal informations and the first equipment to the second equipment, first equipment to the second equipment Delayed data be second equipment obtain the temporal information of the first time information and the difference of the first time information, The third temporal information is the temporal information that first equipment obtains second temporal information, second equipment to institute State the first equipment delayed data be the third temporal information and second equipment send second temporal information when Between information difference.The embodiment of the present invention, which realizes, measures the time delay symmetry of equipment, to adapt to have time delay symmetry The business transmitting scene of strict demand.

In another embodiment, the first equipment replaces with the first kind specific identifier code block sent in code stream Second class specific identifier code block carries the first time information and is sent in part or all of third class specific identifier code block To the second equipment；Wherein, third class specific identifier code block includes at least one of: the second class specific identifier code block, S identification code Block；The third class specific identifier code block that the parsing of first equipment receives in code stream obtains the second temporal information.The embodiment of the present invention is logical It crosses and first kind specific identifier code block is replaced with into the second class specific identifier code block to realize the transmission of temporal information, be not take up additional Bandwidth.

The other feature and advantage of the embodiment of the present invention will illustrate in the following description, also, partly from explanation It is become apparent in book, or understood by implementing the embodiment of the present invention.The purpose of the embodiment of the present invention and other advantages It can be achieved and obtained by structure specifically noted in the specification, claims and drawings.

Detailed description of the invention

Attached drawing is used to provide one for further understanding technical solution of the embodiment of the present invention, and constituting specification Point, it is used to explain the present invention the technical solution of embodiment together with the embodiment of the embodiment of the present invention, does not constitute to the present invention The limitation of embodiment technical solution.

Fig. 1 (a) is the schematic diagram of fiber direct connection of embodiment of the present invention scheme；

Fig. 1 (b) is the schematic diagram one of forward pass of embodiment of the present invention equipment based Carrying Scheme；

Fig. 1 (c) is the schematic diagram two of forward pass of embodiment of the present invention equipment based Carrying Scheme；

Fig. 2 is the flow chart for the time delay symmetry measurement method that one embodiment of the invention proposes；

Fig. 3 is the structural schematic diagram that S of the embodiment of the present invention identifies code block and O identifies code block；

Fig. 4 (a) is the structural schematic diagram of temporal information；

Fig. 4 (b) is the schematic diagram one that the embodiment of the present invention carries temporal information in third class specific identifier code block；

Fig. 4 (c) is the schematic diagram two that the embodiment of the present invention carries temporal information in third class specific identifier code block；

Fig. 5 is the flow chart for the time delay symmetry measurement method that another embodiment of the present invention proposes；

Fig. 6 is the flow chart for the time delay symmetry measurement method that another embodiment of the present invention proposes；

Fig. 7 is the flow chart for the time delay symmetry measurement method that another embodiment of the present invention proposes；

Fig. 8 is the structure composition schematic diagram for the time delay symmetry measuring device that another embodiment of the present invention proposes；

Fig. 9 is the structure composition schematic diagram for the time delay symmetry measuring device that another embodiment of the present invention proposes；

Figure 10 is the structure composition schematic diagram for the time delay symmetry measuring device that another embodiment of the present invention proposes；

Figure 11 is the structure composition schematic diagram for the time delay symmetry measuring device that another embodiment of the present invention proposes；

Figure 12 (a) is that temporal information of the embodiment of the present invention transmits schematic diagram one；

Figure 12 (b) is that temporal information of the embodiment of the present invention transmits schematic diagram two；

Figure 12 (c) is that temporal information of the embodiment of the present invention transmits schematic diagram three；

Figure 12 (d) is that temporal information of the embodiment of the present invention transmits schematic diagram four；

Figure 13 is the topological network schematic diagram of cpri of embodiment of the present invention business.

Specific embodiment

The embodiment of the present invention is described in detail below in conjunction with attached drawing.It should be noted that in the feelings not conflicted Under condition, the feature in embodiment and embodiment in the present invention can mutual any combination.

Step shown in the flowchart of the accompanying drawings can be in a computer system such as a set of computer executable instructions It executes.Also, although logical order is shown in flow charts, and it in some cases, can be to be different from herein suitable Sequence executes shown or described step.

Mainly there are fiber direct connection scheme, equipment based Carrying Scheme two to the connection that time delay symmetry has the business of strict demand Kind；It is if Fig. 1 (a) show fiber direct connection scheme, i.e., straight between user side equipment (the equipment A and equipment B as shown in Fig. 1 (a)) Optical fiber connection was connected, other load bearing equipments are not passed through；As Fig. 1 (b) show equipment based Carrying Scheme, i.e. user side equipment Pass through minimum 2 load bearing equipments (equipment 1 and equipment as shown in Fig. 1 (b) between (the equipment A and equipment B as shown in Fig. 1 (b)) 2, and equipment 1, equipment 2 as shown in Fig. 1 (c) and equipment 3) be attached.In order to meet business to the tight of time delay symmetry Lattice requirement, equipment based Carrying Scheme are needed to reach the performance close to fiber direct connection, be proposed to the delay variation of equipment, symmetry huge Big challenge.

Flexible Ethernet (FlexE-Flexible Ethernet) technology is by International Organization for standardization's light networking forum (OIF, Optical Internetworking Forum) initiates research in March, 2015 and formally decides by vote in March, 2016 logical Cross relevant technical documentation.Flexible ethernet technology provides the general mechanism of one kind to transmit a series of different media access controls The business of (MAC, Media Access Control) rate, can be the single biggish business of MAC speed ratio, is also possible to more The set of a lesser business of MAC speed ratio, is no longer limited to the business of single MAC rate.

Difference on flexible Ethernet (FlexE, Flexible Ethernet) and traditional ethernet structure be flexibly with Too net is in the more bed course (FlexE of MAC layer and Physical Coding Sublayer (PCS, Physical Coding Sublayer) layer Shim layers), the function of the bed course is to construct the Calendar (template) that size is 20 × n 66b block, n be bind with Too net physical layer (PHY, physical layer) number, each 66b block represent the time slot of a 5G.In multiplexing side, different MAC The business of rate is put into corresponding number 66b block according to the multiple proportion with 5G.Every 20 66b blocks constitute a sub- Calendar, size are that the Calendar of 20 × n is distributed in n sub-Calendar.For each sub-Calendar, often 20 × 1023 66b blocks add the expense of a 66b block, and for storing relevant mapping relations, each sub-Calendar exists It is transmitted in the ethernet PHY of single 100G.In demultiplexing side, it is 20 × n's that n sub-Calendar, which forms a size, Calendar extracts corresponding client traffic from the 66b block of corresponding number according to the mapping relations stored in expense.Wherein Expense uses O code expanded definition.

802.3 define a few class codings, comprising:

Idle character (I, idle) is used for adaptation process control system (PCS, Process Control System) clock Rate changes and adds and delete；

Start character (S, start), is used to indicate the starting of data packet；

Final character (T, terminate), is used to indicate the termination of a data packet；

Control character (O, ordered_set), for sending the control based on link and a kind of extension of status information.

Referring to fig. 2, one embodiment of the invention proposes a kind of time delay symmetry measurement method, comprising:

Step 200, the first equipment send first time information to the second equipment.

In embodiments of the present invention, the first equipment can be arbitrary equipment, such as load bearing equipment, forward pass equipment, edge device (PE, Provider Edge), edge router etc..

In embodiments of the present invention, the first equipment can send first time information to the second equipment using various ways t1.For example, the first kind specific identifier code block sent in code stream is replaced with the second class specific identifier code block by the first equipment, in portion Point or whole third class specific identifier code block in carry first time information t1 and be sent to the second equipment；Wherein, third class is special It includes at least one of that code block is known in calibration: the second class specific identifier code block, S identify code block.In this way, believing in sending time Additional bandwidth will not be occupied when breath.

In embodiments of the present invention, the first equipment can will send the first kind specific identifier in code stream according to pre-defined rule Code block replaces with the second class specific identifier code block, for example, replacing with the specific mark of the second class every m first kind specific identifier code block Know code block, that is to say, that there is (m-1) a first kind specific identifier code block between two neighboring second class specific identifier code block.

In embodiments of the present invention, first kind specific identifier code block includes at least one of:

The free message that T is identified between code block and S mark code block identifies code block, K code；

During specific implementation, T is identified to free message (IDLE) the mark code block replacement between code block and S mark code block Code block is identified for O, or K code is replaced with into S mark code block.

Wherein, S identifies code block (also becoming heading block) and the structure of O mark code block is as shown in Figure 3.

0-1 bit is 66 bits (Bit) block type: 10 be control block (such as O identifies code block, S mark code block), and 01 is number According to block；

2-9 bit is 66bit block subtype: S block is indicated when for 0x78 (S identifies code block)；O is indicated when for 0x4B Block (i.e. O identifies code block)；

The 10-65 bit of S block is data content, is in actual use the data of immobilized substance.

The 10-33 bit of O block is data content, and 34-41 bit is characterized code, and 42-65 bit is data content.

So, it is carried in third class specific identifier code block shown in temporal information such as Fig. 4 (a) and Fig. 4 (b), original time Information is indicated using 80 bits, wherein preceding 48 bit indicates second grade temporal information, rear 32 bit indicates nsec information, The embodiment of the present invention indicates nsec using 32 bits (such as data2 to data5) in third class specific identifier code block Information (i.e. time stab information).

It wherein, can be nsec by the 18-33 bit expanded of third class specific identifier code block as shown in Fig. 4 (b) High 16 bit of information, wherein 18-19 bit is used to indicate to be the temporal information type (TS_type) transmitted, such as Fig. 4 (a) institute Show, TS_type indicates default type when being 0, indicate request type (TS_req) when TS_type is 1, and TS_type is indicated when being 2 Respond style (TS_resp) indicates TS negotiation packet when TS_type is 3；

42-57 bit expanded is low 16 bit of nsec information.

In another embodiment, third class specific identifier code block also carries at least one of:

Customer number, IDLE number, sequence number, cyclic redundancy check code (CRC, Cyclic RedundancyCheck), Time stamp effectively indicates, K code indicates.

When CPRI business enters from the side U, there is no S and T, in due course addition S and the T blocks of meeting after caching process, with packet Form in forwarded, when containing K code in a packet, sampling time information, addition time stab information, and time stab information is had Effect instruction and the instruction set of K code are effective；Otherwise time stab information is effectively indicated and the instruction set of K code is invalid.

Wherein, encoder client is the number of user side original client, under the scene of part after possible multiple original clients convergences Unified carrying is transmitted, and latency measurement and adjustment need to cover closer user side path end to end, transmitting original client number Information is in order to distinguishing routing information；

IDLE number for included before this third class specific identifier code block I identify code block number；

The sequence number of the corresponding local sequence of Serial No. this third class specific identifier code block；

CRC is used to verify the information in third class specific identifier code block；

Time stamp effectively indicates whether the time stab information being used to indicate in third class specific identifier code block is effective；

The instruction of K code is used to indicate in the packet after third class specific identifier code block whether have K code.

It can be customer number by the 10-13 bit expanded of third class specific identifier code block as shown in Fig. 4 (b)；14-17 Bit expanded is idle number；58-61 bit expanded is sequence number；62-65 bit expanded is the CRC of 66 bit block.

It, can be by the 18-33 of third class specific identifier code block when using S mark code block replacement K code as shown in Fig. 4 (c) Bit expanded is high 16 bit of nsec information, wherein 18-19 bit is used to indicate the temporal information type of transmitting (TS_type), as shown in Fig. 4 (a), TS_type indicates default type when being 0, and request type (TS_ is indicated when TS_type is 1 Req), respond style (TS_resp) is indicated when TS_type is 2, and TS negotiation packet is indicated when TS_type is 3；

10-13 bit expanded is customer number；

14-15 bit expanded reservation bit；

16 bit expandeds are the instruction of K code；

17 bit expandeds are that time stamp effectively indicates；

18-33 bit expanded is high 16 bit of time stab information (i.e. nsec information), wherein 18-19 bit is used In the time stamp type (i.e. time information type) for indicating transmitting；

34-41 bit is reserved bit；

42-57 bit expanded is low 16 bit of time stab information；

58-61 bit expanded is sequence number；

62-65 bit expanded is the CRC of 66 bit block.

Bit expanded above is only a kind of example, and 10-33 bit and 42-65 bit are used to carry temporal information Mode is not only the above-mentioned mode listed, can also be using other representations, for example, when being indicated using 18-33 bit Between information low 16 bit, using 42-57 bit indicate temporal information high 16 bit.Which bit is the embodiment of the present invention expand Exhibition for indicate which information be not construed as limiting, specific extended mode without in limit the embodiment of the present invention protection scope, this In repeat no more.

In embodiments of the present invention, the first equipment carries at the first time in part or all of third class specific identifier code block Information t1 is simultaneously sent to the second equipment and includes:

The sequence number of local sequence is added 1 when first equipment often encounters a third class specific identifier code block； Alternatively, first equipment is when K code is effectively designated as the first default indicated value (such as K code be effectively designated as 1) by the local The sequence number of sequence adds 1；

First equipment obtains the first time information t1 in the first preset value of Serial No. of local sequence (i.e. The temporal information of current device), the corresponding third class specific identifier in the first preset value of Serial No. of local sequence The first time information t1 is carried in code block and is sent to the second equipment.

Wherein, the maximum value of the sequence number of local sequence can be preset, for example, set the sequence number of local sequence Maximum value is X, then a third class specific identifier code block is encountered if renewed as the Serial No. X of local sequence, it will The zero setting again of the sequence number of local sequence.

In another embodiment, the first equipment obtains institute in the first preset value of Serial No. of local sequence After stating first time information t1, this method further include:

First equipment calculates CRC, the corresponding third class in the first preset value of Serial No. of the local sequence The first time information t1 and CRC is carried in specific identifier code block and is sent to the second equipment.

Wherein it is possible to calculate crc value using CRC4.

Step 201, the first equipment receive the second temporal information that the second equipment is sent, and obtain third temporal information；Wherein, Second temporal information is that the second equipment sends the temporal information of the second temporal information and the delay letter of the first equipment to the second equipment The sum of breath, the delayed data of the first equipment to the second equipment are the time letter that second equipment obtains the first time information The difference of breath and the first time information, third temporal information are the temporal information that the first equipment obtains the second temporal information, institute The delayed data for stating the second equipment to first equipment is that the third temporal information and second equipment send described the The difference of the temporal information of two temporal informations.

In embodiments of the present invention, the first equipment can send first time information to the second equipment using with the first equipment The corresponding mode of t1 receives the second temporal information of the second equipment transmission, i.e. it is special that the first equipment parsing receives the third class in code stream Calibration knows code block and obtains the second temporal information.

When third class specific identifier code block also carries CRC, the first equipment first carries out CRC to third class specific identifier code block Verification after verification passes through, parses 32 temporal information fields of third class specific identifier code block, extracts the time of preceding 2 bit Information type TS_type, when TS_type be 2 when indicate respond style TS_resp, that is, be identified as the temporal information be second when Between information obtain the temporal information of current device as third temporal information t4 when recognizing the second temporal information.

First equipment can parse third class specific identifier code block one by one and determine whether to carry temporal information, can also be according to With the about definite value of the second equipment, extracting time information when the second preset value of Serial No. in third class specific identifier code block.

In embodiments of the present invention, this method further include:

First equipment carries out time delay pair according to the second temporal information t3+ (t2-t1) and the third temporal information t4 The compensation of title property.

Specifically, the first equipment can using following any method according to the second temporal information and third temporal information into The compensation of row time delay symmetry.

The first, the first equipment obtains second temporal information and a corresponding third temporal information, The compensation of time delay symmetry is carried out according to second temporal information and a corresponding third temporal information.

When third temporal information t4 is greater than the second temporal information t3+ (t2-t1), caching waterline is reduced, the value of reduction is The absolute value of the difference of third temporal information t4 and the second temporal information t3+ (t2-t1)；When third temporal information t4 is equal to second Between information t3+ (t2-t1) when, keep caching waterline it is constant；When third temporal information t4 is less than the second temporal information t3+ (t2- When t1), increase caching waterline, it is increased to be worth the absolute of the difference for being third temporal information t4 and the second temporal information t3+ (t2-t1) Value；

Second, the first equipment obtains n second temporal informations and the n corresponding third temporal informations, root The compensation of time delay symmetry is carried out according to n the second temporal informations and n corresponding third temporal informations.

When the first equipment obtains n second temporal informations and the n corresponding third temporal informations, first is set The standby maximum value and minimum value rejected in n second temporal informations rejects the n corresponding third temporal informations most Big value and minimum value；Calculate the average value of second temporal information and the average value of the third temporal information；According to described The average value of second temporal information and the average value of the third temporal information carry out the compensation of time delay symmetry；Wherein, n be greater than Or the integer equal to 3.

Specifically, caching waterline is reduced when the average value of third temporal information is greater than the average value of the second temporal information, The value of reduction is the absolute value of the difference of the average value of third temporal information and the average value of the second temporal information；Believe when the third time When the average value of breath is equal to the average value of the second temporal information, keep caching waterline constant；When the average value of third temporal information Less than the second temporal information average value when, increase caching waterline, it is increased value be third temporal information average value and second The absolute value of the difference of the average value of temporal information.

The embodiment of the present invention passes through the adjustment of caching waterline, so that reception of the sending direction of the first equipment to the second equipment The sending direction of the delay in direction and the second equipment to the first equipment receiving direction delay it is almost the same, realize time delay The adjustment of symmetry, to meet the transmission needs to the higher business of time delay symmetry requirement.

A kind of time delay symmetry measurement method is proposed referring to Fig. 5, another embodiment of the present invention, comprising:

Step 500, the second equipment receive the first time information that the first equipment is sent, and obtain the 4th temporal information；Wherein, 4th temporal information is the temporal information that second equipment obtains the first time information.

In embodiments of the present invention, the second equipment can send first time information to the second equipment using with the first equipment Corresponding method receives the first time information that the first equipment is sent, i.e. it is special that the second equipment parsing receives the third class in code stream Calibration knows code block and obtains first time information.

In another embodiment, the third class specific identifier code block that the parsing of the second equipment receives in code stream obtains Before first time information, this method further include:

Second equipment carries out cyclic redundancy check code verification to the third class specific identifier code block, and verification parses after passing through The third class specific identifier code block obtains the first time information.

That is, the second equipment is first to third class particular identification code when third class specific identifier code block also carries CRC Block carries out CRC check, after verification passes through, parses 32 temporal information fields of third class specific identifier code block, extracts preceding 2 ratio Special temporal information type TS_type indicates request type TS_req when TS_type is 1, that is, being identified as the temporal information is First time information obtains the temporal information of current device as the 4th temporal information t2 when recognizing first time information, That is second equipment of above-described embodiment receives the temporal information of first time information.

Second equipment can parse third class specific identifier code block one by one and determine whether to carry temporal information, can also be according to With the about definite value of the first equipment, extracting time information when the first preset value of Serial No. in third class specific identifier code block.

Step 501, second equipment calculate described the according to the 4th temporal information and the first time information Delayed data of one equipment to second equipment.

Specifically, delayed data is the difference of the 4th temporal information and first time information.

Step 502, the second equipment send the second temporal information to the first equipment；Wherein, second temporal information is hair Send the temporal information and the sum of the delayed data of second temporal information.

In embodiments of the present invention, the second equipment can send the second temporal information to the first equipment using various ways, For example, the first kind specific identifier code block sent in code stream is replaced with the second class specific identifier code block by the second equipment, in part Or the second temporal information is carried in whole third class specific identifier code blocks and is sent to the first equipment；Wherein, the specific mark of third class Knowing code block includes at least one of: the second class specific identifier code block, S identify code block.

Specifically, by the sequence of local sequence when second equipment often encounters a third class specific identifier code block Number plus 1；Alternatively, second equipment is when K code is effectively designated as the second default indicated value by the sequence number of the local sequence Add 1；

Second equipment is obtained in the second preset value of Serial No. of local sequence sends the third temporal information Temporal information t3 (i.e. the temporal information of current device), it is corresponding described in the second preset value of Serial No. of local sequence Second temporal information (i.e. t3+ | t2-t1 |) is carried in third class specific identifier code block and is sent to the first equipment.

In another embodiment, the second equipment obtains hair in the second preset value of Serial No. of local sequence After the temporal information for sending second temporal information, this method further include:

Second equipment calculates CRC, the corresponding third class specific identifier in the second preset value of Serial No. of local sequence The second temporal information and CRC are carried in code block and are sent to the first equipment.

It in another embodiment, should after the delayed data of the second equipment calculating the first equipment to the second equipment Method further include:

Second equipment judges the validity of delayed data of first equipment to the second equipment, when first equipment arrives When the delayed data of second equipment is effective, second temporal information is carried in part or all of second class specific identifier code block And it is sent to the first equipment；When the delayed data of the first equipment to the second equipment is invalid, terminate this process.

Specifically, indicating that delayed data is invalid when delayed data is 0；Delayed data is indicated when delayed data is not 0 Effectively.

Referring to Fig. 6, another embodiment of the present invention proposes a kind of time delay symmetry measurement method, comprising:

Step 600, the first equipment send first time information to the second equipment.

In embodiments of the present invention, the first equipment can be arbitrary equipment, as forward pass equipment, edge device (PE, Provider Edge), edge router etc..

In embodiments of the present invention, the first equipment can send first time information to the second equipment using various ways t1.For example, the first kind specific identifier code block sent in code stream is replaced with the second class specific identifier code block by the first equipment, in portion Point or whole third class specific identifier code block in carry first time information and be sent to the second equipment；Wherein, third class is specific Identifying code block includes at least one of: the second class specific identifier code block, S identify code block.In this way, in transmission time information Shi Buhui occupies additional bandwidth.

During specific implementation, T is identified into free message (I) the mark code block between code block and S mark code block and replaces with O Code block is identified, or K code is replaced with into S mark code block.

The 10-33 bit of O block is data content, and it is data content before 42-65 bit expanded that 34-41 bit, which is characterized code,.

It wherein, can be nanosecond by the 18-33 bit expanded of only daughter's class specific identifier code block as shown in Fig. 4 (b) High 16 bit of temporal information, wherein 18-19 bit is used to indicate to be the temporal information type (TS_type) transmitted, such as Fig. 4 (a) shown in, TS_type indicates default type when being 0, indicates request type (TS_req) when TS_type is 1, TS_type 2 When indicate respond style (TS_resp), TS_type be 3 when indicate TS negotiation packet；

42-57 bit expanded is low 16 bit of nsec information.

10-13 bit expanded is customer number；

14-15 bit expanded reservation bit；

16 bit expandeds are the instruction of K code；

17 bit expandeds are that time stamp effectively indicates；

34-41 bit is reserved bit；

42-57 bit expanded is low 16 bit of time stab information；

58-61 bit expanded is sequence number；

62-65 bit expanded is the CRC of 66 bit block.

In embodiments of the present invention, the first equipment carries at the first time in part or all of third class specific identifier code block Information is simultaneously sent to the second equipment and includes:

First equipment obtains the first time information in the first preset value of Serial No. of local sequence and (works as The temporal information of preceding equipment), the corresponding third class particular identification code in the first preset value of Serial No. of local sequence The first time information is carried in block and is sent.

In another embodiment, the first equipment obtains institute in the first preset value of Serial No. of local sequence After stating first time information, this method further include:

First equipment calculates CRC, the corresponding third class in the first preset value of Serial No. of the local sequence The first time information and CRC are carried in specific identifier code block and are sent.

Wherein it is possible to calculate crc value using CRC4.

Step 601, the first equipment receive the 5th temporal information that the second equipment is sent, and obtain third temporal information；Wherein, 5th temporal information includes: that the second equipment obtains described in the temporal information and second equipment transmission of the first time information The temporal information of 5th temporal information, the third temporal information be first equipment obtain the 5th temporal information when Between information.

In another embodiment, the 5th temporal information further includes first time information.

In embodiments of the present invention, the first equipment can send first time information to the second equipment using with the first equipment Corresponding mode receives the 5th temporal information of the first equipment transmission, i.e. the third class that the first equipment parsing receives in code stream is specific Mark code block obtains the 5th temporal information.

When third class specific identifier code block also carries CRC, the first equipment first carries out CRC to third class specific identifier code block Verification after verification passes through, parses 32 temporal information fields of third class specific identifier code block, extracts the time of preceding 2 bit Information type TS_type, when TS_type be 2 when indicate respond style TS_resp, that is, be identified as the temporal information be the 5th when Between information obtain the temporal information of current device as third temporal information t4 when recognizing five temporal informations.

Step 602, the first equipment calculate temporal information and first time information that the second equipment obtains first time information The first difference and third temporal information and the second equipment send the 4th temporal information temporal information the second difference；The One equipment carries out the compensation of time delay symmetry according to first difference and second difference.

Specifically, the first equipment can carry out time delay pair according to the first difference and the second difference using following any method The compensation of title property.

The first, the first equipment obtains first difference and corresponding second difference, according to first difference Corresponding second difference carries out the compensation of time delay symmetry with one.

When the second difference is greater than the first difference, reduce caching waterline, the value of reduction be the second difference and the first difference it Absolute value of the difference；When the second difference is equal to the first difference, keep caching waterline constant；When the second difference is less than the first difference When, increase caching waterline, increased value is the absolute value of the difference of the second difference and the first difference；

Second, the first equipment obtains n the first differences and n corresponding second differences, according to n the first differences and n A corresponding second difference carries out the compensation of time delay symmetry.

When obtaining n first differences and n corresponding second differences, reject in n first differences Maximum value and minimum value, reject the maximum value and minimum value of n corresponding second difference；Calculate first difference The average value of average value and second difference；According to the average value of first difference and the average value of second difference into The compensation of row time delay symmetry；Wherein, n is the integer more than or equal to 3.

Specifically, reducing caching waterline, the value of reduction when the average value of the second difference is greater than the average value of the first difference For the absolute value of the difference of the average value of the average value and the first difference of the second difference；When the average value of the second difference is poor equal to first When the average value of value, keep caching waterline constant；When average value of the average value of the second difference less than the first difference, increase slow Water line, the increased absolute value of the difference being worth for the average value of the second difference and the average value of the first difference.

Referring to Fig. 7, another embodiment of the present invention proposes a kind of time delay symmetry measurement method, comprising:

Step 700, the second equipment receive the first time information that the first equipment is sent, and obtain the 4th temporal information；Wherein, 4th temporal information is the temporal information that second equipment obtains the first time information.

In another embodiment, the second class specific identifier code block that the parsing of the second equipment receives in code stream obtains Before first time information, this method further include:

Step 701, the second equipment judge the validity of the first time information and the 4th temporal information；When described The second equipment sends the 5th temporal information to the first equipment when first time information and effective the 4th temporal information；Its In, the 5th temporal information includes: the 4th information t2 and temporal information t3 for sending the 5th temporal information.

In embodiments of the present invention, indicate that first time information is invalid when first time information is 0；Believe when first time Breath indicates that first time information is effective when not being 0.

Indicate that the 4th temporal information is invalid when the 4th temporal information is 0；The 4th is indicated when the 4th temporal information is not 0 Temporal information is effective.

In another embodiment, the 5th temporal information further includes first time information t1.

In embodiments of the present invention, the second equipment can send the 5th temporal information to the first equipment using various ways, For example, the first kind specific identifier code block sent in code stream is replaced with the second class specific identifier code block by the second equipment, in part Or the 5th temporal information is carried in whole third class specific identifier code blocks and is sent to the first equipment；Wherein, the specific mark of third class Knowing code block includes at least one of: the second class specific identifier code block, S identify code block.

Second equipment is obtained in the second preset value of Serial No. of local sequence sends the 5th temporal information Temporal information (i.e. the temporal information of current device), in the second preset value of Serial No. of local sequence corresponding described The 5th temporal information is carried in three classes specific identifier code block and is sent to the first equipment.

In another embodiment, the second equipment obtains hair in the second preset value of Serial No. of local sequence After the temporal information for sending the 5th temporal information, this method further include:

Second equipment calculates CRC, the corresponding third class specific identifier in the second preset value of Serial No. of local sequence The 5th temporal information and CRC are carried in code block and are sent.

In another embodiment, after the second equipment obtains the 4th temporal information, this method further include:

Referring to Fig. 8, another embodiment of the present invention proposes a kind of time delay symmetry measuring device (such as the first equipment), packet It includes:

First sending module 801, for sending first time information to the second equipment；

First receiving module 802 obtains third temporal information for receiving the second temporal information of the second equipment transmission；

Wherein, second temporal information be the second equipment send the second temporal information temporal information and the first equipment to The sum of the delayed data of second equipment, the delayed data of the first equipment to the second equipment are that second equipment obtains described first The absolute value of the difference of the temporal information of temporal information and the first time information, third temporal information are that the first equipment obtains the The temporal information of two temporal informations, the delayed data of second equipment to first equipment be the third temporal information and Second equipment sends the difference of the temporal information of second temporal information.

In embodiments of the present invention, the first sending module 801 is specifically used for:

The first kind specific identifier code block sent in code stream is replaced with into the second class specific identifier code block, part or all of First time information is carried in third class specific identifier code block and is sent to the second equipment；Wherein, third class specific identifier code block Including at least one of: the second class specific identifier code block, S identify code block；

First receiving module 802 is specifically used for:

The third class specific identifier code block that parsing receives in code stream obtains the second temporal information, obtains third temporal information.

In another embodiment, further includes:

First compensating module 803, for carrying out time delay pair according to second temporal information and the third temporal information The compensation of title property.

In embodiments of the present invention, the first compensating module 803 is specifically used for:

When obtaining n second temporal informations and the n corresponding third temporal informations, n described the are rejected Maximum value and minimum value in two temporal informations reject the maximum value and minimum value of the n corresponding third temporal informations；Meter Calculate the average value of second temporal information and the average value of the third temporal information；According to the flat of second temporal information The average value of mean value and the third temporal information carries out the compensation of time delay symmetry；Wherein, n is the integer more than or equal to 1.

The sequence number of local sequence is added 1 when often encountering a third class specific identifier code block；Alternatively, having in K code The sequence number of the local sequence is added 1 when effect is designated as the first default indicated value；

The first time information is obtained in the first preset value of Serial No. of local sequence, in the sequence of local sequence The first time information is carried when number being the first preset value in the corresponding third class specific identifier code block and is sent to the Two equipment.

In embodiments of the present invention, the first sending module 801 is also used to:

Calculating cyclic redundancy check code, the corresponding third in the first preset value of Serial No. of the local sequence The first time information and the cyclic redundancy check code are carried in class specific identifier code block and are sent to the second equipment.

The specific implementation process of above-mentioned time delay symmetry measuring device is identical as previous embodiment, and which is not described herein again.

Referring to Fig. 9, another embodiment of the present invention proposes a kind of time delay symmetry measuring device (such as the second equipment), packet It includes:

Second receiving module 901 obtains the 4th temporal information for receiving the first time information of the first equipment transmission； Wherein, the 4th temporal information is the temporal information that second equipment obtains the first time information；

First computing module 902, for calculating described the according to the 4th temporal information and the first time information Delayed data of one equipment to second equipment；

Second sending module 903, for sending the second temporal information to the first equipment；

In embodiments of the present invention, the second receiving module 901 is specifically used for:

The third class specific identifier code block that parsing receives in code stream obtains first time information, obtains the 4th temporal information；

Second sending module 903 is specifically used for:

The first kind specific identifier code block sent in code stream is replaced with into the second class specific identifier code block, part or all of The second temporal information is carried in third class specific identifier code block and is sent to the first equipment；Wherein, third class specific identifier code block Including at least one of: the second class specific identifier code block, S identify code block.

In embodiments of the present invention, the second sending module 903 is also used to:

The validity for judging delayed data of first equipment to the second equipment, when first equipment to the second equipment Delayed data it is effective when, second temporal information is carried in part or all of third class specific identifier code block and is sent to First equipment.

In embodiments of the present invention, the second receiving module 901 is also used to:

Cyclic redundancy check code verification is carried out to the third class specific identifier code block, verification parses the third after passing through Class specific identifier code block obtains the first time information.

In embodiments of the present invention, the second sending module 903 is specifically used for:

The sequence number of local sequence is added 1 when often encountering a third class specific identifier code block；Alternatively, having in K code The sequence number of the local sequence is added 1 when effect is designated as the second default indicated value；

The temporal information for sending second temporal information is obtained in the second preset value of Serial No. of local sequence, Second time is carried in the corresponding third class specific identifier code block when the second preset value of Serial No. of local sequence Information is simultaneously sent to the first equipment.

Referring to Figure 10, another embodiment of the present invention proposes a kind of time delay symmetry measuring device (such as the first equipment), Include:

Third sending module 1001, for sending first time information to the second equipment；

Third receiving module 1002 obtains third temporal information for receiving the 5th temporal information of the second equipment transmission； Wherein, the 5th temporal information includes: the temporal information and second equipment hair that the second equipment obtains the first time information The temporal information of the 5th temporal information is sent, the third temporal information is that first equipment obtains the 5th time letter The temporal information of breath；

Second computing module 1003 receives the temporal information of the first time information for calculating second equipment When sending the described 4th with the first difference of the first time information and the third temporal information and second equipment Between information temporal information the second difference；

Second compensating module 1004, for carrying out time delay symmetry benefit according to first difference and second difference It repays.

In embodiments of the present invention, third sending module 1001 is specifically used for:

Third receiving module 1002 is specifically used for:

The third class specific identifier code block that parsing receives in code stream obtains the 5th temporal information, obtains third temporal information.

In embodiments of the present invention, the second compensating module 1004 is specifically used for:

When obtaining n first differences and n corresponding second differences, reject in n first differences Maximum value and minimum value, reject the maximum value and minimum value of n corresponding second difference；Calculate first difference The average value of average value and second difference；According to the average value of first difference and the average value of second difference into The compensation of row time delay symmetry；Wherein, n is the integer more than or equal to 1.

Referring to Figure 11, another embodiment of the present invention proposes a kind of time delay symmetry measurement method (such as the second equipment), Include:

4th receiving module 1101 obtains the 4th temporal information for receiving the first time information of the first equipment transmission； Wherein, the 4th temporal information is the temporal information that second equipment obtains the first time information；

4th sending module 1102, for judging the validity of the first time information and the 4th temporal information；

When the first time information and effective the 4th temporal information, the 5th time letter is sent to the second equipment Breath；Wherein, the 5th temporal information includes: the 4th information and the temporal information for sending the 5th temporal information.

In embodiments of the present invention, the 4th receiving module 1101 is specifically used for:

4th sending module 1102 is specifically used for:

The first kind specific identifier code block sent in code stream is replaced with into the second class specific identifier code block, part or all of The 5th temporal information is carried in third class specific identifier code block and is sent to the first equipment；Wherein, third class specific identifier code block Including at least one of: the second class specific identifier code block, S identify code block.

Another embodiment of the present invention proposes a kind of time delay symmetry measuring device, including processor and computer-readable Storage medium is stored with instruction in the computer readable storage medium, when described instruction is executed by the processor, realizes Any of the above-described kind of time delay symmetry measurement method.

Another embodiment of the present invention proposes a kind of computer readable storage medium, is stored thereon with computer program, The computer program realizes the step of any of the above-described kind of time delay symmetry measurement method when being executed by processor.

Computer storage medium include but is not limited to RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, It digital versatile disc (DVD) or other optical disc storages, magnetic holder, tape, disk storage or other magnetic memory apparatus or can use In any other medium that stores desired information and can be accessed by a computer.

Another embodiment of the present invention proposes a kind of time delay symmetry measuring system, comprising:

First equipment, for sending first time information to the second equipment；Receive the second time letter of the second equipment transmission Breath obtains third temporal information；Wherein, second temporal information is the temporal information that the second equipment sends the second temporal information With the sum of the delayed data of the first equipment to the second equipment, the delayed data of first equipment to the second equipment is described second Equipment obtains the temporal information of the first time information and the difference of the first time information, and third temporal information sets for first The standby temporal information for obtaining the second temporal information, when the delayed data of second equipment to first equipment is the third Between information and second equipment send second temporal information temporal information difference；

In embodiments of the present invention, the first equipment is specifically used for:

The first kind specific identifier code block sent in code stream is replaced with into the second class specific identifier code block, part or all of First time information is carried in third class specific identifier code block and is sent to the second equipment；Wherein, third class specific identifier code block Including at least one of: the second class specific identifier code block, S identify code block；The third class that parsing receives in code stream is specific Mark code block obtains the second temporal information, obtains third temporal information；

Second equipment is specifically used for:

The third class specific identifier code block that parsing receives in code stream obtains first time information, obtains the 4th temporal information； Believed according to the delay that the 4th temporal information and the first time information calculate first equipment to second equipment Breath；The first kind specific identifier code block sent in code stream is replaced with into the second class specific identifier code block, in part or all of third The second temporal information is carried in class specific identifier code block and is sent to the first equipment.

In another embodiment, the first equipment is also used to:

The compensation of time delay symmetry is carried out according to second temporal information and the third temporal information.

In embodiments of the present invention, the first equipment is specifically used for being realized in the following ways according to second temporal information The compensation of time delay symmetry is carried out with the third temporal information:

In another embodiment, the first equipment is also used to:

The first time information is obtained in the first preset value of Serial No. of local sequence, calculates cyclic redundancy check Code, in the first preset value of Serial No. of the local sequence in the corresponding third class specific identifier code block described in carrying First time information and the cyclic redundancy check code are simultaneously sent to the second equipment；

Second equipment is also used to:

In another embodiment, the second equipment is also used to:

The validity for judging delayed data of first equipment to the second equipment, when the delayed data is effective, Second temporal information is carried in part or all of third class specific identifier code block and is sent to the first equipment.

The specific implementation process of above-mentioned time delay symmetry measuring system is identical as previous embodiment, and which is not described herein again.

First equipment, for sending first time information to the second equipment；The 5th temporal information is received, the third time is obtained Information；Wherein, the 5th temporal information includes: that the second equipment obtains the temporal information of the first time information and described second and sets Preparation send the temporal information of the 5th temporal information, when the third temporal information is that first equipment obtains the described 5th Between information temporal information；Calculate second equipment obtain the first time information temporal information and the first time First difference of information and the third temporal information and second equipment send the time letter of the 5th temporal information Second difference of breath；The compensation of time delay symmetry is carried out according to first difference and second difference；

Second equipment obtains the 4th temporal information for receiving the first time information of the first equipment transmission；Wherein, institute Stating the 4th temporal information is the temporal information that second equipment obtains the first time information；Judge the first time letter The validity of breath and the 4th temporal information；When the first time information and effective the 4th temporal information, to First equipment sends the 5th temporal information；Wherein, the 5th temporal information includes: the 4th information and transmission the 5th time The temporal information of information.

In embodiments of the present invention, the first equipment is specifically used for being realized in the following ways to when the second equipment transmission first Between information, receive the second equipment send the 5th temporal information:

The first kind specific identifier code block sent in code stream is replaced with into the second class specific identifier code block, part or all of First time information is carried in third class specific identifier code block and is sent to the second equipment；Wherein, third class specific identifier code block Including at least one of: the second class specific identifier code block, S identify code block；The third class that parsing receives in code stream is specific Mark code block obtains the 5th temporal information；

Second equipment is specifically used for:

The third class specific identifier code block that parsing receives in code stream obtains first time information, obtains the 4th temporal information； The first kind specific identifier code block sent in code stream is replaced with into the second class specific identifier code block, it is special in part or all of third class Calibration, which is known, to be carried the 5th temporal information and is sent to the first equipment in code block.

In embodiments of the present invention, the first equipment is specifically used for being realized in the following ways according to first difference and institute It states the second difference and carries out the compensation of time delay symmetry:

Below for the FlexE transmission pipeline that OIF is defined, four kinds of examples are given, but are not limited to FlexE in the implementation Pipeline is also possible to FlexO etc., these variations are all in the scope of this patent.

As shown in Figure 12 (a), edge device 1 replaces first kind specific identifier code block using the second class specific identifier code block, By third class specific identifier code block to 2 transmission time information 1 of edge device, 2 receiving time information 1 of edge device, and obtain Temporal information 2 is replaced first kind specific identifier code block using the second class specific identifier code block, is believed based on temporal information 1 and time Breath 2 uses third class specific identifier code block to 1 transmission time information 3 of edge device, 1 receiving time information 3 of edge device, and obtains Temporal information 4 is taken, the delayed data and edge device 2 of edge device 1 to edge device 2 are set to edge to realize The symmetrical measurement of standby 1 delayed data.Wherein, third class specific identifier code block includes at least one of: the specific mark of the second class Know code block, S identifies code block.

Example 1

The general public wireless of 25G Ethernet of edge device (i.e. the load bearing equipment direct-connected with user side equipment) fiber direct connection Interface (ecpri, ethernet common public radio interface) service bearer uses in 100G FlexE Heading identifies code block (S identifies code block) or free message mark code block (IDLE identifies code block) or heading identifies code block (S Mark code block) and free message mark code block (IDLE mark code block) pass through the temporal information of processing.

Shown in topological network such as Fig. 1 (b), shown in temporal information transmittance process such as Figure 12 (b), this method comprises:

Step 1: the sending direction of edge device 1 has time delay symmetry the ecpri business of strict demand, by ecpri Business and temporal information are transmitted after being carried to FlexE by 100G optical fiber.

Step 1 includes:

Step 1.1: what the side U (i.e. the entrance of RU antenna, also referred to as user side, functional area) 802.3 of edge device 1 defined Code block is identified to the IDLE between T identification code and S mark code block in pcs layers of 66/64B code stream, according to certain rules by part IDLE mark code block replaces with O mark code block；

Step 1.2: the local sequence that one mould of maintenance is 16；Code block is identified on O or S identifies code block, local sequence Sequence number adds 1, and the temporal information t1 (the first time information of above-described embodiment) of current device is extracted when Serial No. 1, And first time information t1 and sequence number are inserted into O mark code block or S mark code block and calculate the 66/64B using CRC4 Crc value is inserted into O mark code block or S mark code block by crc value；

Step 1.3: business being carried in 100G FlexE pipeline according to FlexE protocol requirement and is transmitted in the side N；

Step 2: the receiving direction of edge device 2 obtains edge device 1 and is sent to the received delayed data of edge device 2.

Step 2 includes:

Step 2.1: business code block will be extracted from the side N (i.e. network side) FlexE time slot of edge device 2, parse O mark Know code block or S identifies code block, when reading O mark code block or S mark code block, first does CRC check, verification identifies O after passing through Each field of code block or S mark code block is parsed；

Step 2.2: when the time, information type was ST_req, it is identified as t1 and extracts the temporal information t2 of current device, Calculate | t2-t1 |, give the sending side of this equipment；

Step 3: the sending direction of edge device 2 believes the forward pass business for having strict demand to time delay symmetry and time Breath is transmitted after being carried to FlexE by 100G optical fiber.

Step 3 includes:

Step 3.1: T mark code block and S being identified in the pcs layer 66/64B code stream that the side U 802.3 of edge device 2 defines IDLE between code block identifies code block, and IDLE mark code block in part is replaced with O mark code block according to certain rules；

Step 3.2: obtaining the timestamp information that obtains from receiving direction | t2-t1 |, and judge | t2-t1 | validity, When | t2-t1 | it is invalidating time information when being 0, temporal information will not be transmitted；When | t2-t1 | it is effective time letter when being not 0 Breath, generation time information sending request；

Step 3.3: the local sequence that one mould of maintenance is 16；When O identifies code block or S mark code block, local sequence Sequence number add 1, when Serial No. 9 extract time stab information t3, calculate t3+ | t2-t1 |, generate t3+ | t2-t1 | time letter Breath, and by the temporal information of generation and sequence number 9 be inserted into O mark code block or S mark code block and using CRC4 calculate this 66/ In 64B crc value, insertion O mark code block or S mark code block；

Step 3.4: business being carried in 100G FlexE pipeline according to FlexE protocol requirement and is transmitted in the side N；

Step 4: the receiving direction of edge device 1 adjusts time delay to meet time delay symmetry requirement.

Step 4 includes:

Step 4.1: business code block will be extracted from the side the N FlexE time slot of edge device 1, parse O mark code block or S Code block is identified, when reading O mark code block or S mark code block, first does CRC check, verification identifies code block to O after passing through or S is marked Each field for knowing code block is parsed；

Step 4.2: when the time, information type was ST_resp, extracting and contain t3+ | t2-t1 | temporal information, sampling is current The timestamp t4 of equipment obtains this group of temporal information t4, t3+ | t2-t1 | send time processing unit；

Step 4.3: time processing unit stores 16 groups of timestamp sample informations, removes a certain range of maximum value and minimum Value, remaining value calculating average value, obtains the average value of t4, t3+ | t2-t1 | average value；

When the average value of t4 be greater than t3+ | t2-t1 | average value when, calculate the average value and t3+ of t4 | t2-t1 | be averaged The absolute difference of value reduces corresponding caching waterline；

When the average value of t4 be less than t3+ | t2-t1 | average value when, calculate the average value and t3+ of t4 | t2-t1 | be averaged The absolute difference of value increases corresponding caching waterline；

When the average value of t4 be equal to t3+ | t2-t1 | average value when, then do not need adjustment caching waterline；

Step 4.4: by the adjustment of waterline, adjust the sending direction of forward pass equipment 2 to forward pass equipment 1 receiving direction Delay, is allowed to almost the same to the delay of 2 receiving direction of forward pass equipment with 1 sending direction of forward pass equipment, complete time delay symmetry Adjustment；Needs are transmitted to the business that time delay symmetry height relies on to meet.

Example 2

By the 25G ecpri service bearer of intermediate node in 100G FlexE, heading block (S block) or free time are used Block of information (IDLE block) or heading block (S block) and free message block (IDLE block) pass through the temporal information of processing.

Shown in topological network such as Fig. 1 (c), temporal information transmitting increases at least one as shown in Figure 12 (c) in topological network A intermediate node (i.e. intermediary device 3 in Fig. 1 (c))；

The processing of edge device 1 and edge device 2 is the same as embodiment one；The O mark of 3 pairs of intermediary device carrying temporal informations Know code block or S identifies code block transparent transmission.

Example 3

By the 25G ecpri service bearer of intermediate node in 100G FlexE, using heading mark code block, (S is marked Knowledge code block) or free message identifies code block (IDLE identifies code block) or heading mark code block (S identifies code block) and the free time believes The unprocessed temporal information of breath mark code block (IDLE identifies code block) transmitting.

Shown in topological network such as Fig. 1 (c), temporal information transmitting such as Figure 12 (d) is shown, this method comprises:

Step 1 includes:

Step 1.1: T mark code block and S being identified in the pcs layer 66/64B code stream that the side U 802.3 of edge device 1 defines IDLE between code block identifies code block, and IDLE mark code block in part is replaced with O mark code block according to certain rules；

Step 1.2: the local sequence that one mould of maintenance is 16；Code block is identified on O or S identifies code block, local sequence Sequence number adds 1, and the temporal information t1 (the first time information of above-described embodiment) of current device is extracted when Serial No. 1, And the 66/64B will be calculated in first time information t1 and sequence number insertion O mark code block or S mark code block and using CRC4 Crc value, will be in crc value insertion O mark code block or S mark code block；

Step 2: business passes through intermediary device 3, and intermediary device 3, which is needed support, identifies code block or S identification code to O The transparent transmission of block.

Step 3: the receiving direction of edge device 2 obtains the temporal information that edge device 1 is sent to edge device 2.

Step 3 includes:

Step 3.1: business code block will be extracted from the side the N FlexE time slot of edge device 2, parse O mark code block or S Code block is identified, when reading O mark code block or S mark code block, first does CRC check, verification identifies code block to O after passing through or S is marked Each field for knowing code block is parsed；

Step 3.2: when the time, information type was ST_req, it is identified as t1 and extracts the timestamp t2 of current device, it will The temporal information of t2, t1 give the sending side of this equipment；

Step 4: the sending direction of edge device 2 believes the forward pass business for having strict demand to time delay symmetry and time Breath is transmitted after being carried to FlexE by 100G optical fiber.

Step 4 includes:

Step 4.1: T mark code block and S being identified in the pcs layer 66/64B code stream that the side U 802.3 of edge device 2 defines IDLE between code block identifies code block, and IDLE mark code block in part is replaced with O mark code block according to certain rules；

Step 4.2: obtaining temporal information t1, the t2 obtained from receiving direction, and judge t1, the validity of t2 works as t2, t1 It is invalidating time information when being 0, temporal information will not be transmitted；Work as t2, t1 is effective time information, generation time when not being 0 Information sending request；

Step 4.3: the local sequence that one mould of maintenance is 16；Code block is identified on O or S identifies code block, local sequence Sequence number adds 1, and when Serial No. 9, (above-described embodiment sends the time letter of the 5th temporal information to extracting time information t3 Breath), t1, t2, t3 are encapsulated into temporal information, and the time stab information of generation and sequence number are inserted into O mark code block or S mark The 66/64BCRC value is calculated in code block and using CRC4, crc value is inserted into O mark code block or S mark code block；

Step 4.4: business being carried in 100G FlexE pipeline according to FlexE protocol requirement and is transmitted in the side N；

Step 5: the receiving direction of edge device 1 adjusts time delay to meet time delay symmetry requirement.

Step 5 includes:

Step 5.1: business code block will be extracted from the side the N FlexE time slot of edge device 1, parse O mark code block or S Code block is identified, when reading O mark code block or S mark code block, first does CRC check, verification identifies code block to O after passing through or S is marked Each field for knowing code block is parsed；

Step 5.2: when the time, information type was ST_resp, extracting and contain t1, the temporal information of t2, t3, sampling is currently set Standby temporal information t4 obtains this group of timestamp sample information t1, t2, t3, t4 and send time processing unit；

Step 5.3: time processing unit calculate | t2-t1 |, | t4-t3 | absolute value, i.e., acquisition edge device 1 arrive edge The delay delay12 and edge device 2 of equipment 2 arrive the delay34 of edge device 1, and by delay12 and delay34, this group is sampled Sample stores；

Step 5.4: 16 groups of sample informations of storage remove a certain range of maximum value and minimum value, and remaining value calculates flat Mean value obtains the average value of delay12 and the average value of delay34；

Step 5.4.1: when the average value of delay34 be greater than delay12 average value when, calculate delay34 average value and The absolute value of the difference of delay12 average value reduces corresponding caching waterline；

Step 5.4.2: when the average value of delay34 be less than delay12 average value when, calculate delay34 average value and The absolute value of the difference of delay12 average value increases corresponding caching waterline；

Step 5.4.3: when the average value of delay34 is equal to the average value of delay12, then adjustment caching water is not needed Line；

Step 5.5: by the adjustment of waterline, adjusting 2 sending direction of forward pass equipment prolonging to 1 receiving direction of forward pass equipment When, it is allowed to almost the same to the delay of 2 receiving direction of forward pass equipment with 1 sending direction of forward pass equipment, complete time delay symmetry tune It is whole；Needs are transmitted to the business that time delay symmetry height relies on to meet.

Example 4

Common public radio interface (cpri, common public radio interface) service bearer exists In 100GFlexE, temporal information is carried using S mark code block replacement K code.

Topological network is as shown in figure 13, this method comprises:

Step 1: the sending direction of edge device 1 has time delay symmetry three road cpri business of strict demand, will It is transmitted after cpri and temporal information independent bearing to FlexE by 100G optical fiber.

Step 1 includes:

Step 1.1: K code is replaced with S mark code block by the side U of edge device 1；

Step 1.2: the K code sequence number of one mould 2 of every CPRI service maintenance, when K code is effectively designated as 1, sequence number Add 1, time stab information t1 is extracted when Serial No. 0, and time stamp is effectively indicated, first time information and customer number and K code In instruction insertion S mark code block；

Step 1.3: every business being carried in 100G FlexE pipeline according to FlexE protocol requirement and is passed in the side N It is defeated；

Step 2 includes:

Step 2.1: business code block will be extracted from the side the N FlexE time slot of edge device 2, parse S mark code block；

Step 2.2: when temporal information is effective in S mark code block, and when temporal information type is ST_req, being identified as the One temporal information t1 and the timestamp t2 for extracting current device, calculate | t2-t1 | absolute value, give the sending side of this equipment；

Step 3: the sending direction of edge device 2 will have the independent cpri business in 3 tunnels of strict demand to time delay symmetry It is carried to after FlexE with temporal information and is transmitted by 100G optical fiber.

Step 3 includes:

Step 3.1: obtaining the timestamp information that obtains from receiving direction | t2-t1 |, and judge | t2-t1 | validity, When | t2-t1 | it is invalidating time information when being 0, temporal information will not be transmitted；When | t2-t1 | it is effective time letter when being not 0 Breath, generation time information sending request；

Step 3.2: the K code sequence number of one mould 2 of every CPRI service maintenance, when K code is effectively designated as 1, sequence number Add 1, time stab information t3 extracted when Serial No. 1, calculate t3+ | t2-t1 |, temporal information is generated, and time stamp is effectively indicated, Temporal information and customer number and the instruction of K code are inserted into S mark code block；

Step 3.3: business being carried in 100G FlexE pipeline according to FlexE protocol requirement and is transmitted in the side N.

Step 4: the receiving direction of edge device 1, adjust time delay to meet time delay symmetry requirement,

Step 4 includes:

Step 4.1: business code block will be extracted from the side the N FlexE time slot of edge device 1, parse S mark code block；

Step 4.2: when the time is effective in S mark code block, and temporal information type is ST_resp, extracting and contain t3+ | T2-t1 | timestamp information, sample the timestamp t4 of current device, obtain this group of timestamp sample information t4, t3+ | t2-t1 | Send timestamp processing unit；

Step 4.3: 16 groups of timestamp sample informations of storage remove a certain range of maximum value and minimum value, remaining value Calculate average value, obtain the average value of t4, t3+ | t2-t1 | average value；

Step 4.3.1: when the average value of t4 be greater than t3+ | t2-t1 | average value when, calculate the average value and t3+ of t4 | T2-t1 | average value absolute difference, reduce corresponding caching waterline；

Step 4.3.2: when the average value of t4 be less than t3+ | t2-t1 | average value when, calculate the average value and t3+ of t4 | T2-t1 | average value absolute difference, increase corresponding caching waterline；

Step 4.3.3: when the average value of t4 be equal to t3+ | t2-t1 | average value when, then do not need adjustment caching waterline；

Step 4.4: by the adjustment of waterline, adjust the sending direction of forward pass equipment 2 to forward pass equipment 1 receiving direction Delay, is allowed to almost the same with the delay of the receiving direction of the sending direction of forward pass equipment 1 to forward pass equipment 2, complete time delay pair The adjustment of title property；Needs are transmitted to the business that time delay symmetry height relies on to meet.

Although embodiment disclosed by the embodiment of the present invention is as above, only the present invention is real for ease of understanding for the content The embodiment applying example and using is not intended to limit the invention embodiment.Skill in any fields of the embodiment of the present invention Art personnel can be in the form and details of implementation under the premise of not departing from spirit and scope disclosed by the embodiment of the present invention It is upper to carry out any modification and variation, but the scope of patent protection of the embodiment of the present invention, it still must be with appended claims institute Subject to the range defined.

Claims

1. a kind of time delay symmetry measurement method, comprising:

First equipment sends first time information to the second equipment；

Wherein, second temporal information is temporal information and the first equipment that the second equipment sends the second temporal information to second The sum of delayed data of equipment, the delayed data of first equipment to second equipment are described in second equipment obtains The difference of the temporal information of first time information and the first time information, the third temporal information are that first equipment obtains The temporal information of second temporal information is obtained, when the delayed data of second equipment to first equipment is the third Between information and second equipment send second temporal information temporal information difference.

2. time delay symmetry measurement method according to claim 1, which is characterized in that this method further include:

3. time delay symmetry measurement method according to claim 2, which is characterized in that it is described according to the second temporal information and Third temporal information carries out the compensation of time delay symmetry

When first equipment obtains n second temporal informations and the n corresponding third temporal informations, described the One equipment rejects the maximum value and minimum value in n second temporal informations, rejects the n corresponding third temporal informations Maximum value and minimum value；Calculate the average value of second temporal information and the average value of the third temporal information；According to The average value of second temporal information and the average value of the third temporal information carry out the compensation of time delay symmetry；Wherein, n is Integer more than or equal to 3.

4. described in any item time delay symmetry measurement methods according to claim 1~3, which is characterized in that first equipment Sending first time information to the second equipment includes:

The first kind specific identifier code block sent in code stream is replaced with the second class specific identifier code block by first equipment, in portion Point or whole third class specific identifier code block in carry the first time information and be sent to second equipment；Wherein, Three classes specific identifier code block includes at least one of: the second class specific identifier code block, S identify code block；

5. time delay symmetry measurement method according to claim 4, which is characterized in that first equipment is in part or entirely First time information is carried in portion's third class specific identifier code block and is sent to the second equipment includes:

The sequence number of local sequence is added 1 when first equipment often encounters a third class specific identifier code block；Alternatively, The sequence number of the local sequence is added 1 when K code is effectively designated as the first default indicated value by first equipment；

First equipment obtains the first time information in the first preset value of Serial No. of local sequence, in local sequence The first time information is carried simultaneously in the corresponding third class specific identifier code block when the first preset value of Serial No. of column It is sent to second equipment.

6. time delay symmetry measurement method according to claim 5, which is characterized in that first equipment is in local sequence The first preset value of Serial No. when obtain the first time information after, this method further include:

The first equipment calculating cyclic redundancy check code, it is corresponding in the first preset value of Serial No. of the local sequence The first time information and the cyclic redundancy check code are carried in the third class specific identifier code block and are sent to described Second equipment.

7. time delay symmetry measurement method according to claim 4, which is characterized in that the first kind specific identifier code block Including at least one of: the free message that T is identified between code block and S mark code block identifies code block, K code；

8. a kind of time delay symmetry measurement method, comprising:

Second equipment receives the first time information that the first equipment is sent, and obtains the 4th temporal information；Wherein, the 4th time Information is the temporal information that second equipment obtains the first time information；

Second equipment calculates first equipment described according to the 4th temporal information and the first time information The delayed data of second equipment；

Second equipment sends the second temporal information to first equipment；

Wherein, second temporal information is the temporal information for sending second temporal information and first equipment described in The sum of the delayed data of second equipment.

9. time delay symmetry measurement method according to claim 8, which is characterized in that second equipment calculates first and sets It is standby to after the delayed data of the second equipment, this method further include:

Second equipment judge first equipment to second equipment delayed data validity, when the delay believe When ceasing effective, it is concurrent that second equipment carries second temporal information in part or all of second class specific identifier code block Give first equipment.

10. time delay symmetry measurement method according to claim 8 or claim 9, which is characterized in that second equipment receives the One equipment send first time information include:

Second equipment sends the second temporal information to the first equipment

The first kind specific identifier code block sent in code stream is replaced with the second class specific identifier code block by second equipment, in portion Point or whole third class specific identifier code block in carry the second temporal information and be sent to first equipment；Wherein, third class Specific identifier code block includes at least one of: the second class specific identifier code block, S identify code block.

11. time delay symmetry measurement method according to claim 10, which is characterized in that the second equipment parsing receives Before third class specific identifier code block in code stream obtains first time information, this method further include:

12. time delay symmetry measurement method according to claim 10, which is characterized in that described in part or all of third The second temporal information is carried in class specific identifier code block and is sent includes:

The sequence number of local sequence is added 1 when second equipment often encounters a third class specific identifier code block；Alternatively, The sequence number of the local sequence is added 1 when K code is effectively designated as the second default indicated value by second equipment；

Second equipment obtained in the second preset value of Serial No. of local sequence send second temporal information when Between information, in the second preset value of Serial No. of local sequence in the corresponding third class specific identifier code block carry described in Second temporal information is simultaneously sent to first equipment.

13. a kind of time delay symmetry measurement method, comprising:

First equipment sends first time information to the second equipment；

First equipment receives the 5th temporal information that second equipment is sent, and obtains third temporal information；Wherein, the 5th time Information includes: temporal information and second equipment transmission the 5th time that the second equipment obtains the first time information The temporal information of information, the third temporal information are the temporal information that first equipment obtains the 5th temporal information；

First equipment calculates the temporal information and the first time information that second equipment obtains the first time information The first difference and the third temporal information and second equipment send the temporal information of the 5th temporal information Second difference；

14. time delay symmetry measurement method according to claim 13, which is characterized in that first equipment is according to first Absolute value and the second absolute value carry out the compensation of time delay symmetry

When first equipment obtains n first differences and n corresponding second differences, n described the are rejected Maximum value and minimum value in one difference reject the maximum value and minimum value of n corresponding second differences；Calculate described The average value of the average value of one difference and second difference；According to the average value of first difference and second difference Average value carries out the compensation of time delay symmetry；Wherein, n is the integer more than or equal to 1.

15. 3~14 described in any item time delay symmetry measurement methods according to claim 1, which is characterized in that when the described 5th Between information further include first time information.

16. 3~14 described in any item time delay symmetry measurement methods according to claim 1, which is characterized in that described first sets It is standby to include: to the second equipment transmission first time information

First equipment by send code stream in first kind specific identifier code block replace with the second class specific identifier code block, part or First time information is carried in whole third class specific identifier code blocks and is sent to second equipment；Wherein, third class is specific Identifying code block includes at least one of: the second class specific identifier code block, S identify code block；

17. a kind of time delay symmetry measurement method, comprising:

When the first time information and effective the 4th temporal information, second equipment sends the to the first equipment Five temporal informations；Wherein, the 5th temporal information includes: the 4th information and the time letter for sending the 5th temporal information Breath.

18. time delay symmetry measurement method according to claim 17, which is characterized in that the 5th temporal information is also wrapped Include first time information.

19. time delay symmetry measurement method according to claim 17, which is characterized in that second equipment receives second Equipment send first time information include:

Second equipment sends the 5th temporal information to the first equipment

The first kind specific identifier code block sent in code stream is replaced with the second class specific identifier code block by second equipment, in portion Point or whole third class specific identifier code block in carry the 5th temporal information and be sent to first equipment；Wherein, third class Specific identifier code block includes at least one of: the second class specific identifier code block, S identify code block.

It is described computer-readable to deposit 20. a kind of time delay symmetry measuring device, including processor and computer readable storage medium Instruction is stored in storage media, which is characterized in that when described instruction is executed by the processor, realization such as claim 1~ 19 described in any item time delay symmetry measurement methods.

21. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program The step of time delay symmetry measurement methods as described in any item such as claim 1~19 are realized when being executed by processor.

22. a kind of time delay symmetry measuring system, comprising:

First equipment, for sending first time information to the second equipment；The second temporal information is received, third time letter is obtained Breath；Wherein, second temporal information is temporal information and the first equipment that the second equipment sends the second temporal information to second The sum of delayed data of equipment, the delayed data of first equipment to second equipment are described in second equipment obtains The difference of the temporal information of first time information and the first time information, the third temporal information are that first equipment obtains The temporal information of second temporal information is obtained, when the delayed data of second equipment to first equipment is the third Between information and second equipment send second temporal information temporal information difference；

Second equipment obtains the 4th temporal information for receiving the first time information of the first equipment transmission；Wherein, described Four temporal informations are the temporal information that second equipment obtains the first time information；According to the 4th temporal information and The first time information calculates first equipment to the delayed data of second equipment；When sending second to the first equipment Between information；Wherein, second temporal information be send second temporal information temporal information and the delayed data it With.

23. a kind of time delay symmetry measuring system, comprising:

First equipment, for sending first time information to the second equipment；The 5th temporal information for receiving the transmission of the second equipment, is obtained Take third temporal information；Wherein, the 5th temporal information include: the second equipment obtain the first time information temporal information and Second equipment sends the temporal information of the 5th temporal information, and the third temporal information is first equipment acquisition The temporal information of 5th temporal information；Calculate second equipment receive the first time information temporal information and First difference of the first time information and the third temporal information and second equipment send the 5th time Second difference of the temporal information of information；The compensation of time delay symmetry is carried out according to first difference and second difference；

Second equipment obtains the 4th temporal information for receiving the first time information of the first equipment transmission；Wherein, described Four temporal informations are the temporal information that second equipment obtains the first time information；Sent for the 5th time to the first equipment Information；Wherein, the 5th temporal information includes: the 4th information and the temporal information for sending the 5th temporal information.