CN102255791B - Inter-equipment link delay determination method and system - Google Patents

Inter-equipment link delay determination method and system Download PDF

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Publication number
CN102255791B
CN102255791B CN2010101868367A CN201010186836A CN102255791B CN 102255791 B CN102255791 B CN 102255791B CN 2010101868367 A CN2010101868367 A CN 2010101868367A CN 201010186836 A CN201010186836 A CN 201010186836A CN 102255791 B CN102255791 B CN 102255791B
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equipment
link
message
time point
point information
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CN102255791A (en
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李晗
黄晓庆
韩柳燕
王磊
张德朝
魏冰
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China Mobile Communications Group Co Ltd
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China Mobile Communications Group Co Ltd
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Abstract

The invention discloses an inter-equipment link delay determination method and an inter-equipment link delay determination system. The method comprises that: first equipment transmits a first message carrying first time point information to second equipment based on a downlink optical fiber link; the second equipment determines second time point information about the reception of the first message and third time point information about the transmission of a second message based on an uplink optical fiber link; the first equipment determines fourth time point information about the reception of the second message; the first and second equipment switches the uplink and downlink optical fiber links; the first and second equipment perform message interaction based on the switched uplink and downlink optical fiber links to obtain fifth, sixth, seventh and eighth time point information; and the link delay of the uplink and downlink optical fiber links is determined according to each piece of obtained time point information. By the technical scheme provided by the invention, the problem of inter-equipment link delay measurement inaccuracy caused by measurement errors of introduced instruments and meters in the prior art is solved.

Description

Determine the method and system of equipment room link delay amount
Technical field
The present invention relates to the mobile communication technology field, relate in particular to a kind of method and system of definite equipment room link delay amount.
Background technology
In global range, commercial digital mobile communication system largest, that coverage is the widest is global system for mobile communications (GSM, Global System for Mobile Communication) at present.Gsm system is commonly referred to as Generation Mobile Telecommunication System (2G, The 2nd Generation Mobile Communication) system.Development along with mobile communication technology, adopt code division multiple access access (CDMA, Code DivisionMultiple Access) 3G (Third Generation) Moblie of technology (3G, The 3rd Generation MobileCommunication) system also maybe will enter commercial stage.The 3G system is mainstream technology with wideband CDMA (WCDMA, Wideband CDMA) standard, time-division synchronization CDMA (TD-SCDMA, TimeDivision-Synchronous CDMA) standard and CDMA 2000 standards.
For TD-SCDMA system, CDMA2000 system, synchronous Long Term Evolution (TD-LTE of time-division, Time Division-Long Term Evolution) communication system such as system, base station needs time/Phase synchronization between eating dishes without rice or wine, can adopt global positioning system (GPS at present, Global Positioning System) realize synchronous between different base station, it realizes that schematic diagram as shown in Figure 1.
Because each base station all needs to receive the time signal of gps system, therefore the GPS module will be installed in each base station, this has just wasted more resource, for this problem, the prior art proposition is unified to receive the time/phase information of standard time source (as the gps system time source) by an equipment, then based on 1588 agreements, by transmission network, the time/phase information received is sent to each base station, as shown in Figure 2, so just do not need each base station that the GPS module all is installed, effectively saved resource.
In the transmitting procedure of transmission time/phase information, usually calculate two link delay amount and time offset between equipment according to the time point that transmits message between two equipment, thereby realize two time/Phase synchronization between equipment, wherein the first equipment sends message by downlink optical fiber chain road direction the second equipment, the second equipment sends message by uplink optical fibers chain road direction the first equipment, as shown in Figure 3, determine that the concrete processing procedure of the link delay amount of the first equipment and the second equipment room and time offset is as follows:
Step 31, the first equipment is at t 1time point sends the Sync message based on downlink optical fiber chain road direction the second equipment, and first equipment that carries in this Sync message sends the time point t of this Sync message 1time point information;
Step 32, the second equipment is at t 2time point receives this Sync message based on the downlink optical fiber link, and records the transmitting time point t of this Sync message 1with time of reception point t 2;
Step 33, the second equipment is at t 3time point sends the Delay_Req message based on uplink optical fibers chain road direction the first equipment, and records the transmitting time point t of this Delay_Req message 3;
Step 34, the first equipment is at t 4after time point receives the Delay_Req message based on the uplink optical fibers link, based on downlink optical fiber chain road direction the second equipment, send the Delay_Resp message, first equipment that carries in this Delay_Resp message receives the time point t of Delay_Req message 4time point information;
Step 35, after the second equipment receives the Delay_Resp message based on the downlink optical fiber link, first equipment that records receives the time point t of Delay_Req message 4, now the second equipment has recorded four time points, i.e. t 1, t 2, t 3and t 4;
Step 36, the second equipment according to four time points of record, determine and the first equipment between time off-set T offsetwith link delay amount T delay, four time points of record and T delayand T offsetbetween have a following relational expression:
T Delay＝(t 2-T Offset)-t 1 (1)
T Delay＝t 4-(t 3-T Offset) (2)
According to above-mentioned two relational expressions, can calculate the link delay amount T between the first equipment and the second equipment delayand time off-set T offset, be specially:
T Delay = ( t 2 - t 1 ) + ( t 4 - t 3 ) 2
T Offset = ( t 2 - t 1 ) + ( t 3 - t 4 ) 2
The second equipment deducts the time of self time off-set T of calculating offsetcan realize and the first equipment between time/Phase synchronization.
In above-mentioned processing procedure, the link delay amount between the first equipment and the second equipment is T delay, that is to say that acquiescence the first equipment is identical with the uplink delay amount that the second equipment sends message to the first equipment to the down link retardation of the second equipment transmission message, but actual communication network mostly is two-way two fine transmission, uplink optical fibers link and downlink optical fiber link adopt different optical fiber, therefore the path of uplink optical fibers link and downlink optical fiber link is unequal, the down link retardation of the first equipment based on downlink optical fiber chain road direction the second equipment transmission message is not identical with the uplink delay amount that the second equipment sends message based on uplink optical fibers chain road direction the first equipment so, now relational expression (1) and relational expression (2) are actually invalid, if the second equipment carries out time/Phase synchronization with the first equipment according to the method described above, the time offset of determining is inaccurate, thereby cause the time/phase place between the first equipment and the second equipment asynchronous.
In order to determine link delay amount accurately, prior art generally adopts optical time domain reflectometer or time tester to be measured the up-downgoing optical fiber link, to obtain up-downgoing optical fiber link retardation, but no matter be optical time domain reflectometer or time tester, all need to adopt instrument and meter to be measured, so just inevitably introduced the measure error of instrument and meter, cause the measurement of equipment room link delay amount inaccurate, and use instrument and meter to measure the business that must interrupt the first equipment and the second equipment, make the flexibility of determining equipment room link delay amount lower.
Summary of the invention
The embodiment of the present invention provides a kind of method and system of definite equipment room link delay amount, in order to solve the measure error due to the introducing instrument and meter existed in prior art, causes the inaccurate problem of measurement of equipment room link delay amount.
Embodiment of the present invention technical scheme is as follows:
A kind of method of definite equipment room link delay amount, the method comprising the steps of: the first equipment sends the first message based on downlink optical fiber chain road direction the second equipment, wherein carries the very first time dot information that sends the first message; The second equipment is determined the second time point information that receives described the first message, and sends the second message based on uplink optical fibers chain road direction the first equipment, determines the 3rd time point information that sends the second message; The first equipment is determined the 4th time point information that receives the second message; The first equipment and the second equipment are switched described uplink optical fibers link and downlink optical fiber link; The downlink optical fiber link of the first equipment based on after switching sends the first message to the second equipment again, wherein carries the 5th time point information that sends the first message; The second equipment is determined the 6th time point information that receives this first message, and sends the second message based on uplink optical fibers chain road direction the first equipment, determines the 7th time point information that sends the second message; The first equipment is determined the 8th time point information that receives the second message; According to described each time point information, determine respectively the link delay amount of described uplink optical fibers link and downlink optical fiber link.
A kind of system of definite equipment room link delay amount, comprise: the first equipment, for based on downlink optical fiber chain road direction the second equipment, sending the first message, wherein carry the very first time dot information that sends the first message, receive the second message that the second equipment sends based on the uplink optical fibers link, and definite the 4th time point information that receives the second message, and described uplink optical fibers link and downlink optical fiber link are switched, downlink optical fiber link based on after switching sends the first message to the second equipment again, wherein carry the 5th time point information that sends the first message, receive the second message that the second equipment sends based on the downlink optical fiber link, determine the 8th time point information that receives the second message, the second equipment, the first message sent based on the downlink optical fiber link for receiving the first equipment, and definite the second time point information that receives the first message, send the second message based on uplink optical fibers chain road direction the first equipment, determine the 3rd time point information that sends the second message, and described uplink optical fibers link and downlink optical fiber link are switched, receive the first message that the downlink optical fiber link of the first equipment based on after switching sends again, determine the 6th time point information that receives this first message, and send the second message based on uplink optical fibers chain road direction the first equipment, determine the 7th time point information that sends the second message, the link delay amount is determined equipment, for according to described each time point information, determines respectively the link delay amount of described uplink optical fibers link and downlink optical fiber link.
In embodiment of the present invention technical scheme, the first equipment sends the first message based on downlink optical fiber chain road direction the second equipment, wherein carry the very first time dot information that sends the first message, the second equipment is determined the second time point information that receives described the first message, and send the second message based on uplink optical fibers chain road direction the first equipment, determine the 3rd time point information that sends the second message, the first equipment is determined the 4th time point information that receives the second message, the first equipment and the second equipment are switched described uplink optical fibers link and downlink optical fiber link, the downlink optical fiber link of the first equipment based on after switching sends the first message to the second equipment again, wherein carry the 5th time point information that sends the first message, the second equipment is determined the 6th time point information that receives this first message, and send the second message based on uplink optical fibers chain road direction the first equipment, determine the 7th time point information that sends the second message, the first equipment is determined the 8th time point information that receives the second message, according to described each time point information, determine respectively the link delay amount of described uplink optical fibers link and downlink optical fiber link, therefore, the first equipment and the second equipment carry out obtaining four time point informations after the message interaction of one-period, then uplink optical fibers link and the downlink optical fiber link between the first equipment and the second equipment general switched, carry out again the message interaction of one-period, so just can access eight time point informations, now just can determine accurately according to eight time point informations the link delay amount of uplink optical fibers link and downlink optical fiber link, do not need to use instrument and meter to be measured, the error of having avoided instrument and meter to bring, therefore can effectively improve and determine equipment room link delay amount accuracy, and due to the business that does not need first equipment that interrupts and the second equipment room, therefore can effectively improve the flexibility of determining equipment room link delay amount.
The accompanying drawing explanation
Fig. 1 is in prior art, and what adopt GPS to realize synchronization among base stations realizes schematic diagram one;
Fig. 2 is in prior art, and what adopt GPS to realize synchronization among base stations realizes schematic diagram two;
Fig. 3 is in prior art, determines the method flow schematic diagram of equipment room link delay amount;
Fig. 4 is in the embodiment of the present invention, determines the method flow schematic diagram of equipment room link delay amount;
Fig. 5 is in the embodiment of the present invention, the uplink downlink schematic diagram one between the first equipment and the second equipment;
Fig. 6 is in the embodiment of the present invention, the uplink downlink schematic diagram two between the first equipment and the second equipment;
Fig. 7 is in the embodiment of the present invention, determines the system configuration schematic diagram of equipment room link delay amount.
Embodiment
Embodiment of the present invention technical scheme main realized to principle, embodiment and the beneficial effect that should be able to reach is at length set forth below in conjunction with each accompanying drawing.
In the embodiment of the present invention, it between the first equipment and the second equipment, is two-way two fine transmission, uplink optical fibers link and downlink optical fiber link adopt different optical fiber, under normal circumstances, the first equipment sends message based on downlink optical fiber chain road direction the second equipment, and the second equipment sends message based on uplink optical fibers chain road direction the first equipment, as shown in Figure 5, optical fiber link 1 is the downlink optical fiber link, and optical fiber link 2 is the uplink optical fibers link.
The embodiment of the present invention provides a kind of method of definite equipment room link delay amount, and as shown in Figure 4, its concrete processing procedure is as follows:
Step 41, the first equipment sends the first message based on downlink optical fiber chain road direction the second equipment, carry the very first time dot information that the first equipment sends the first message in the first message, the first message can be, but not limited to the message into Sync, and first equipment that carries in the Sync message sends the very first time dot information of this Sync message;
Step 42, the second equipment receives the first message that the first equipment sends based on the downlink optical fiber link, determines the second time point information that receives the first message, and the second equipment also can be determined the very first time dot information carried in the first message;
Wherein the first equipment can be carried at very first time dot information in the Sync message, send to the second equipment based on the downlink optical fiber link, the first equipment also can adopt other mode to send very first time dot information to the second equipment, for example at first the first equipment send the Sync message based on downlink optical fiber chain road direction the second equipment, and then send the Follow_Up message based on downlink optical fiber chain road direction the second equipment, carry the very first time dot information that the first equipment sends the Sync message in the Follow_Up message, the second equipment is very first time dot information by the time point information carried in the Follow_Up message received.
Step 43, the second equipment sends the second message based on uplink optical fibers chain road direction the first equipment, and the second equipment is determined the 3rd time point information that sends the second message, and wherein the second message can be, but not limited to the message into Delay_Req;
Step 44, the first equipment is determined the 4th time point information that receives the second message;
After the second message that the first equipment sends based on the uplink optical fibers link at second equipment that receives, also can further based on downlink optical fiber chain road direction the second equipment, send the 3rd message, first equipment that carries in the 3rd message receives the 4th time point information of the second message, wherein the 3rd message can be, but not limited to the message into Delay_Resp, and first equipment that carries in the Delay_Resp message receives the 4th time point information of Delay_Req message;
In step 41～44, the downlink optical fiber link that the first equipment is used when the second equipment sends message is optical fiber link 1, the uplink optical fibers link that the second equipment is used when the first equipment sends message is optical fiber link 2, the message interaction process that step 41～44 are period 1 of carrying out between the first equipment and the second equipment, the first equipment and the second equipment are after the message interaction of period 1, can access four time point informations, i.e. very first time dot information, the second time point information, the 3rd time point information and the 4th time point information.
Step 45, the first equipment and the second equipment are switched above-mentioned uplink optical fibers link and downlink optical fiber link;
Wherein the first equipment and the second equipment are switched uplink optical fibers link and downlink optical fiber link, can be, but not limited to comprise following three kinds of performances:
The first performance, initiate switching by Network Management Equipment: the message interaction situation between Network Management Equipment Real-Time Monitoring the first equipment and the second equipment, after second equipment that monitors receives three message of the first equipment based on the transmission of downlink optical fiber link, this Network Management Equipment is confirmed to carry out the switching of up-downgoing optical fiber link, therefore can send switch indicating information to the first equipment and the second equipment, after the first equipment and the second equipment receive switch indicating information, the up-downgoing optical fiber link is switched, because each equipment in communication network all can be connected with other a plurality of equipment, therefore Network Management Equipment carries the equipment identification information of the second equipment in the switch indicating information that sends to the first equipment, and carry the equipment identification information of the first equipment in the switch indicating information that sends to the second equipment, the first equipment is according to the equipment identification information carried in the switch indicating information received, search the up-downgoing optical fiber link be connected with the second equipment, in like manner, the second equipment is according to the equipment identification information carried in the switch indicating information received, search the up-downgoing optical fiber link be connected with the first equipment,
The second performance, initiate switching by the second equipment: after the 3rd message that the second equipment sends based on the downlink optical fiber link at first equipment that receives, confirmation can be carried out the switching of up-downgoing optical fiber link, the second equipment sends handover request message based on uplink optical fibers chain road direction the first equipment, the first equipment is after receiving handover request message, send switching response message based on downlink optical fiber chain road direction the second equipment, and after sending switching response message, uplink optical fibers link and downlink optical fiber link are switched, the second equipment is switched uplink optical fibers link and downlink optical fiber link after receiving switching response message, carry the equipment identification information of the second equipment in the handover request message that wherein the second equipment sends, carry the equipment identification information of the first equipment in the switching response message that the first equipment sends, in order to guarantee that the second equipment can receive switching response message, the embodiment of the present invention proposes, the second equipment sends 3 handover request message to the first equipment continuously, and just carry out the switching of up-downgoing optical fiber link after two switching response message that receive the first equipment feedback, the first equipment often receives a handover request message just to the second equipment feedback switching response message, and carry out the switching of up-downgoing optical fiber link after sending out two switching response message,
The third performance: by the first equipment, initiate switching: the first equipment is after sending the 3rd message based on downlink optical fiber chain road direction the second equipment, confirmation can be carried out the switching of up-downgoing optical fiber link, the first equipment sends handover request message based on downlink optical fiber chain road direction the second equipment, the second equipment is after receiving handover request message, send switching response message based on uplink optical fibers chain road direction the first equipment, and after sending switching response message, uplink optical fibers link and downlink optical fiber link are switched, the first equipment is switched uplink optical fibers link and downlink optical fiber link after receiving switching response message, carry the equipment identification information of the first equipment in the handover request message that wherein the first equipment sends, carry the equipment identification information of the second equipment in the switching response message that the second equipment sends, in order to guarantee that the first equipment can receive switching response message, the embodiment of the present invention proposes, the first equipment sends 3 handover request message to the second equipment continuously, and just carry out the switching of up-downgoing optical fiber link after two switching response message that receive the second equipment feedback, the second equipment often receives a handover request message just to the first equipment feedback switching response message, and carry out the switching of up-downgoing optical fiber link after sending out two switching response message.
In the prior art, generally regard uplink optical fibers link and downlink optical fiber link as an integral body, be that uplink optical fibers link and downlink optical fiber link form a complete optical fiber link, if uplink optical fibers link and/or downlink optical fiber link break down, whole complete optical fiber link must be switched to another complete optical fiber link so.
After the first equipment and the second equipment are switched uplink optical fibers link and downlink optical fiber link, as shown in Figure 6, the first equipment can send message to the second equipment by the downlink optical fiber link (being optical fiber link 2) based on after switching, and the second equipment can send message to the first equipment by the uplink optical fibers link (being optical fiber link 2) based on after switching.
In the embodiment of the present invention, the two ends of each optical fiber link are connected with the optical module of equipment respectively, the two ends of the optical fiber link 1 in Fig. 5 are connected with the transmission optical module of the first equipment and the reception optical module of the second equipment respectively, the two ends of optical fiber link 2 are connected with the reception optical module of the first equipment and the transmission optical module of the second equipment respectively, after the up-downgoing optical fiber link switches to Fig. 6 by Fig. 5, the two ends of optical fiber link 1 are connected with the reception optical module of the first equipment and the transmission optical module of the second equipment respectively, the two ends of optical fiber link 2 are connected with the transmission optical module of the first equipment and the reception optical module of the second equipment respectively.
Step 46, the downlink optical fiber link of the first equipment based on after switching sends the first message to the second equipment again, first equipment that carries in this first message sends the 5th time point information of the first message, the first message can be, but not limited to the message into Sync, and first equipment that carries in the Sync message sends the 5th time point information of this Sync message; ;
Step 47, the second equipment receives the first message that the first equipment sends based on the downlink optical fiber link, determines the 6th time point information that receives this first message, can also determine the 5th time point information;
Step 48, the second equipment sends the second message based on uplink optical fibers chain road direction the first equipment, and determines the 7th time point information that sends the second message, and wherein the second message can be, but not limited to the message into Delay_Req;
Step 49, the first equipment is determined the 8th time point information that receives the second message;
The first equipment is after determining the 8th time point information, can also send the 3rd message by downlink optical fiber chain road direction the second equipment based on after switching, first equipment that carries in the 3rd message receives the 8th time point information of second message of the second equipment based on the transmission of uplink optical fibers link, wherein the 3rd message can be, but not limited to the message into Delay_Resp, and first equipment that carries in the Delay_Resp message receives the 6th time point information of Delay_Req message;
In step 46～49, the downlink optical fiber link that the first equipment is used when the second equipment sends message is optical fiber link 2, the uplink optical fibers link that the second equipment is used when the first equipment sends message is optical fiber link 1, the message interaction process that step 46～49 are the second round of carrying out between the first equipment and the second equipment, the first equipment and the second equipment, after the message interaction of second round, can access eight time point informations.
Step 410, according to each time point information, determine respectively uplink optical fibers link between the first equipment and the second equipment and the link delay amount of downlink optical fiber link.
Wherein the link delay amount of uplink optical fibers link and downlink optical fiber link is determined respectively in the following way:
T Delay 1 = ( t 4 - t 3 ) + ( t 6 - t 5 ) 2
T Delay 2 = ( t 2 - t 1 ) + ( t 8 - t 7 ) 2
Wherein, T delay1link delay amount for the uplink optical fibers link; T delay2link delay amount for the downlink optical fiber link; t 1for very first time dot information; t 2it is the second time point information; t 3it is the 3rd time point information; t 4it is the 4th time point information; t 5it is the 5th time point information; t 6it is the 6th time point information; t 7it is the 7th time point information; t 8it is the 8th time point information.
In the embodiment of the present invention, determine that the link delay amount of uplink optical fibers link and downlink optical fiber link can be, but not limited to comprise following two kinds of implementations:
The first implementation, by the second equipment, determined: each time point information that the first equipment will be determined sends to the second equipment by message, and the second equipment, according to each time point information, is determined respectively the link delay amount of uplink optical fibers link and downlink optical fiber link;
The second implementation, by Network Management Equipment, determined: each time point information that the first equipment and the second equipment will be determined sends to Network Management Equipment, Network Management Equipment, according to each time point information received, is determined respectively the link delay amount of uplink optical fibers link and downlink optical fiber link.
In addition, the embodiment of the present invention also proposes further to determine the link delay compensation rate, follow-up, while carrying out time synchronized, can determine T according to the mode of prior art offset, then the link delay compensation rate that basis is determined is to T offsetcompensate and get final product, wherein link delay compensation rate Δ tdetermine in the following way:
Δ T = T Delay 2 - T Delay 1 2
The embodiment of the present invention proposes, and can, according to the very first time dot information, the second time point information, the 7th time point information and the 8th time point information that obtain, determine the time off-set T between the first equipment and the second equipment offset, also can, according to the 3rd time point information, the 4th time point information, the 5th time point information and the 6th time point information, determine the time offset between the first equipment and the second equipment, wherein time off-set T offsetdetermine in the following way:
T Offset = ( t 2 - t 1 ) + ( t 7 - t 8 ) 2 Perhaps
T Offset = ( t 3 - t 4 ) + ( t 6 - t 5 ) 2
Determining T offsetafter, the second equipment can be according to T offsetthe time of carrying out/Phase synchronization is processed, and the time of self is deducted to T offsetget final product.
Wherein link delay compensation rate and time offset can be determined by Network Management Equipment, also can be determined by the second equipment.
Determining link delay compensation rate Δ tafter, the first equipment and the second equipment are switched the up-downgoing optical fiber link, be about to the up-downgoing optical fiber link and switch to Fig. 5 by Fig. 6, follow-up the first equipment and the second equipment can carry out message interaction according to the up-downgoing optical fiber link occupation mode shown in Fig. 5, carry out message interaction according to up-downgoing optical fiber link occupation mode of the prior art, during need and the second equipment time of carrying out at follow-up the first equipment/Phase synchronization, the first equipment sends the first message based on downlink optical fiber chain road direction the second equipment, carry the 9th time point information that sends the first message in this first message, the second equipment receives the first message, and the tenth time point information of determining the 9th time point information and receiving the first message, the second equipment sends the second message based on uplink optical fibers chain road direction the first equipment, determine the 11 time dot information that sends the second message, the first equipment is determined the 12 time point information that receives the second message, according to the 9th time point information, the tenth time point information, the 11 time dot information, the 12 time point information and link delay compensation rate Δ t, the second equipment and the first equipment time of carrying out/Phase synchronization are processed, at first, according to the 9th time point information, the tenth time point information, the 11 time dot information, the 12 time point information, determine T offset, and then according to Δ tto T offsetcompensate, by T offsetwith Δ taddition, deduct T by the time of self offsetwith Δ tvalue after addition gets final product.
Wherein, the method of definite link delay amount that the embodiment of the present invention proposes can be, but not limited to be applied in time/phase locked process in, for example, after the link delay amount of determining the first optical fiber link and the second optical fiber link, can further calculate the fiber lengths of the first optical fiber link and the second optical fiber link.
From above-mentioned processing procedure, in embodiment of the present invention technical scheme, the first equipment sends the first message based on downlink optical fiber chain road direction the second equipment, wherein carry the very first time dot information that sends the first message, the second equipment is determined the second time point information that receives described the first message, and send the second message based on uplink optical fibers chain road direction the first equipment, determine the 3rd time point information that sends the second message, the first equipment is determined the 4th time point information that receives the second message, the first equipment and the second equipment are switched described uplink optical fibers link and downlink optical fiber link, the downlink optical fiber link of the first equipment based on after switching sends the first message to the second equipment again, wherein carry the 5th time point information that sends the first message, the second equipment is determined the 6th time point information that receives this first message, and send the second message based on uplink optical fibers chain road direction the first equipment, determine the 7th time point information that sends the second message, the first equipment is determined the 8th time point information that receives the second message, according to described each time point information, determine respectively the link delay amount of described uplink optical fibers link and downlink optical fiber link, therefore, the first equipment and the second equipment carry out obtaining four time point informations after the message interaction of one-period, then uplink optical fibers link and the downlink optical fiber link between the first equipment and the second equipment general switched, carry out again the message interaction of one-period, so just can access eight time point informations, now just can determine accurately according to eight time point informations the link delay amount of uplink optical fibers link and downlink optical fiber link, do not need to use instrument and meter to be measured, the error of having avoided instrument and meter to bring, therefore can effectively improve and determine equipment room link delay amount accuracy, and due to the business that does not need first equipment that interrupts and the second equipment room, therefore can effectively improve the flexibility of determining equipment room link delay amount.
Accordingly, the embodiment of the present invention also provides a kind of system of definite equipment room link delay amount, and its structure as shown in Figure 7, comprises that the first equipment 71, the second equipment 72 and link delay amount determine equipment 73, wherein:
The first equipment 71, for based on downlink optical fiber chain road direction the second equipment 72, sending the first message, wherein carry the very first time dot information that sends the first message, receive the second message that the second equipment 72 sends based on the uplink optical fibers link, and definite the 4th time point information that receives the second message, and described uplink optical fibers link and downlink optical fiber link are switched, downlink optical fiber link based on after switching sends the first message to the second equipment 72 again, wherein carry the 5th time point information that sends the first message, receive the second message that the second equipment 72 sends based on the downlink optical fiber link, determine the 8th time point information that receives the second message
The second equipment 72, the first message sent based on the downlink optical fiber link for receiving the first equipment 71, and definite the second time point information that receives the first message, send the second message based on uplink optical fibers chain road direction the first equipment 71, determine the 3rd time point information that sends the second message, and described uplink optical fibers link and downlink optical fiber link are switched, receive the first message that the downlink optical fiber link of the first equipment 71 based on after switching sends again, determine the 6th time point information that receives this first message, and send the second message based on uplink optical fibers chain road direction the first equipment 71, determine the 7th time point information that sends the second message,
The link delay amount is determined equipment 73, for according to each time point information, determines respectively the link delay amount of described uplink optical fibers link and downlink optical fiber link.
Preferably, described system also comprises the first Network Management Equipment, wherein:
The first Network Management Equipment, for receive three message of the first equipment 71 based on the down link transmission at second equipment 72 that monitors after, send switch indicating information to the first equipment 71 and the second equipment 72;
The switch indicating information that the first equipment 71 and the second equipment 72 send according to the first Network Management Equipment, switched described uplink optical fibers link and downlink optical fiber link.
Preferably, the first equipment 71 is switched described uplink optical fibers link and downlink optical fiber link, specifically comprise: after the first equipment 71 is determined the 4th time point information that receives the second message, send the 3rd message based on downlink optical fiber chain road direction the second equipment 72, after the handover request message sent at second equipment 72 that receives, send switching response message based on downlink optical fiber chain road direction the second equipment 72, and after sending switching response message, described uplink optical fibers link and downlink optical fiber link are switched;
The second equipment 72 is switched described uplink optical fibers link and downlink optical fiber link, specifically comprise: after the second equipment 72 receives the 3rd message of the first equipment based on the transmission of downlink optical fiber link, send handover request message based on uplink optical fibers chain road direction the first equipment 71, receive the switching response message that the first equipment 71 sends based on the downlink optical fiber link, and after receiving described switching response message, described uplink optical fibers link and downlink optical fiber link are switched.
Preferably, described link delay amount determines that equipment is arranged in described the second equipment; Each time point information that described the first equipment 71 is determined sends to the second equipment 72 by message respectively; The second equipment 72, according to each time point information received and self each definite time point information, is determined respectively the link delay amount of described uplink optical fibers link and downlink optical fiber link.
Preferably, described system also comprises the second Network Management Equipment, wherein:
Each time point information that the first equipment 71 and the second equipment 72 will be determined sends to the second Network Management Equipment;
The second Network Management Equipment, for connecing according to each time point information received, determine respectively the link delay amount of described uplink optical fibers link and downlink optical fiber link.
The first Network Management Equipment and the second Network Management Equipment in the embodiment of the present invention can be, but not limited to be placed in the Same Physical entity.
Preferably, described system also comprises that the link delay compensation rate determines equipment, for determine described uplink optical fibers link that equipment 73 is determined and the link delay amount of descending fiber links according to the link delay amount, determine the link delay compensation rate between described the first equipment 71 and described the second equipment 72.
More preferably, also comprise synchronous processing equipment, wherein:
Described the first equipment 71 is also for sending the first message based on downlink optical fiber chain road direction the second equipment 72, wherein carry the 9th time point information that sends the first message, receive the second message that the second equipment 72 sends based on the uplink optical fibers link, determine the 12 time point information that receives the second message;
The first message that described the second equipment 72 also sends based on the downlink optical fiber link for receiving the first equipment 71, determine the tenth time point information that receives described the first message, and send the second message based on uplink optical fibers chain road direction the first equipment 71, determine the 11 time dot information that sends the second message;
Described synchronous processing equipment, for according to described the 9th time point information, the tenth time point information, the 11 time dot information, the 12 time point information and the link delay compensation rate determined, by the second equipment 72 and the first equipment 71 time of carrying out/Phase synchronization processing.
Preferably, described system also comprises that time offset determines equipment, for according to very first time dot information, the second time point information, the 7th time point information and the 8th time point information, determines the time offset between described the first equipment and 71 second equipment 72;
Or, according to described the 3rd time point information, the 4th time point information, the 5th time point information and the 6th time point information, determine the time offset between described the first equipment 71 and the second equipment 72.
Wherein time offset determines that equipment and link delay compensation rate determine that equipment can be, but not limited to be arranged in the second equipment.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.

Claims (18)

1. the method for a definite equipment room link delay amount, is characterized in that, comprising:
The first equipment sends the first message based on downlink optical fiber chain road direction the second equipment, wherein carries the very first time dot information that sends the first message;
The second equipment is determined the second time point information that receives described the first message, and sends the second message based on uplink optical fibers chain road direction the first equipment, determines the 3rd time point information that sends the second message;
The first equipment is determined the 4th time point information that receives the second message;
The first equipment and the second equipment are switched described uplink optical fibers link and downlink optical fiber link;
The downlink optical fiber link of the first equipment based on after switching sends the first message to the second equipment again, wherein carries the 5th time point information that sends the first message;
The second equipment is determined the 6th time point information that receives this first message, and sends the second message based on uplink optical fibers chain road direction the first equipment, determines the 7th time point information that sends the second message;
The first equipment is determined the 8th time point information that receives the second message;
According to described each time point information, determine respectively the link delay amount of described uplink optical fibers link and downlink optical fiber link;
Also comprise:
According to the described uplink optical fibers link of determining and the link delay amount of downlink optical fiber link, determine the link delay compensation rate between described the first equipment and described the second equipment.
2. the method for definite equipment room link delay amount as claimed in claim 1, is characterized in that, the first equipment and the second equipment are switched described uplink optical fibers link and downlink optical fiber link, specifically comprise:
The first equipment and the second equipment receive the switch indicating information that Network Management Equipment sends;
The first equipment and the second equipment, according to the switch indicating information received, are switched described uplink optical fibers link and downlink optical fiber link.
3. the method for definite equipment room link delay amount as claimed in claim 1, is characterized in that, the first equipment and the second equipment are switched described uplink optical fibers link and downlink optical fiber link, specifically comprise:
After the first equipment is determined the 4th time point information that receives the second message, based on downlink optical fiber chain road direction the second equipment, send the 3rd message;
After the second equipment receives described the 3rd message, based on uplink optical fibers chain road direction the first equipment, send handover request message;
The first equipment, after receiving described handover request message, sends switching response message based on downlink optical fiber chain road direction the second equipment, and after sending switching response message, described uplink optical fibers link and downlink optical fiber link is switched;
The second equipment is switched described uplink optical fibers link and downlink optical fiber link after receiving described switching response message.
4. the method for definite equipment room link delay amount as claimed in claim 1, is characterized in that, each time point information that described the first equipment is determined sends to the second equipment by message respectively;
The second equipment, according to each time point information received and self each definite time point information, is determined respectively the link delay amount of described uplink optical fibers link and downlink optical fiber link.
5. the method for definite equipment room link delay amount as claimed in claim 1, is characterized in that, according to described each time point information, determines respectively the link delay amount of described uplink optical fibers link and downlink optical fiber link, specifically comprises:
Each time point information that the first equipment and the second equipment will be determined sends to Network Management Equipment;
Described Network Management Equipment, according to each time point information received, is determined respectively the link delay amount of described uplink optical fibers link and downlink optical fiber link.
6. the method for definite equipment room link delay amount as claimed in claim 1, is characterized in that, the link delay amount of described uplink optical fibers link and downlink optical fiber link is determined respectively in the following way:
T De ; au 1 = ( t 4 - t 3 ) + ( t 6 - t 5 ) 2
T Delay 2 = ( t 2 - t 1 ) + ( t 8 - t 7 ) 2
Wherein, T delay1link delay amount for described uplink optical fibers link; T delay2link delay amount for described downlink optical fiber link; t 1for very first time dot information; t 2it is the second time point information; t 3it is the 3rd time point information; t 4it is the 4th time point information; t 5it is the 5th time point information; t 6it is the 6th time point information; t 7it is the 7th time point information; t 8it is the 8th time point information.
7. the method for definite equipment room link delay amount as claimed in claim 1, is characterized in that, also comprises:
The first equipment sends the first message based on downlink optical fiber chain road direction the second equipment, wherein carries the 9th time point information that sends the first message;
The second equipment is determined the tenth time point information that receives described the first message, and sends the second message based on uplink optical fibers chain road direction the first equipment, determines the 11 time dot information that sends the second message;
The first equipment is determined the 12 time point information that receives the second message;
According to described the 9th time point information, the tenth time point information, the 11 time dot information, the 12 time point information and the link delay compensation rate determined, the second equipment and the first equipment time of carrying out/Phase synchronization are processed.
8. the method for definite equipment room link delay amount as claimed in claim 1, is characterized in that, described link delay compensation rate is determined in the following way:
Δ T = T Delay 2 - T Delay 1 2
Δ tfor the link delay compensation rate between described the first equipment and described the second equipment;
T delay1link delay amount for the uplink optical fibers link;
T delay2link delay amount for the downlink optical fiber link.
9. the method for definite equipment room link delay amount as claimed in claim 1, is characterized in that, also comprises:
According to described very first time dot information, the second time point information, the 7th time point information and the 8th time point information, determine the time offset between described the first equipment and the second equipment;
Or, according to described the 3rd time point information, the 4th time point information, the 5th time point information and the 6th time point information, determine the time offset between described the first equipment and the second equipment.
10. the method for definite equipment room link delay amount as claimed in claim 9, is characterized in that, described time offset is determined in the following way:
T Offset = ( t 2 - t 1 ) + ( t 7 - t 8 ) 2 ; Perhaps
Figure FDA0000389819830000042
Wherein, T offsetfor the time offset between described the first equipment and the second equipment;
T 1for very first time dot information; t 2it is the second time point information; t 3it is the 3rd time point information; t 4it is the 4th time point information; t 5it is the 5th time point information; t 6it is the 6th time point information; t 7it is the 7th time point information; t 8it is the 8th time point information.
11. the method as the described definite equipment room link delay amount of 1～10 arbitrary claim is characterized in that described the first equipment is clock equipment; Described the second equipment is from clockwork;
Described the first message is the Sync message;
Described the second message is the Delay_Req message.
12. the system of a definite equipment room link delay amount, is characterized in that, comprising:
The first equipment, for based on downlink optical fiber chain road direction the second equipment, sending the first message, wherein carry the very first time dot information that sends the first message, receive the second message that the second equipment sends based on the uplink optical fibers link, and definite the 4th time point information that receives the second message, and described uplink optical fibers link and downlink optical fiber link are switched, downlink optical fiber link based on after switching sends the first message to the second equipment again, wherein carry the 5th time point information that sends the first message, receive the second message that the second equipment sends based on the downlink optical fiber link, determine the 8th time point information that receives the second message,
The second equipment, the first message sent based on the downlink optical fiber link for receiving the first equipment, and definite the second time point information that receives the first message, send the second message based on uplink optical fibers chain road direction the first equipment, determine the 3rd time point information that sends the second message, and described uplink optical fibers link and downlink optical fiber link are switched, receive the first message that the downlink optical fiber link of the first equipment based on after switching sends again, determine the 6th time point information that receives this first message, and send the second message based on uplink optical fibers chain road direction the first equipment, determine the 7th time point information that sends the second message,
The link delay amount is determined equipment, for according to described each time point information, determines respectively the link delay amount of described uplink optical fibers link and downlink optical fiber link;
Also comprise:
The link delay compensation rate is determined equipment, for determine described uplink optical fibers link that equipment is determined and the link delay amount of downlink optical fiber link according to the link delay amount, determines the link delay compensation rate between described the first equipment and described the second equipment.
13. the system of definite equipment room link delay amount as claimed in claim 12, is characterized in that, also comprises:
The first Network Management Equipment, for receive three message of the first equipment based on the down link transmission at second equipment that monitors after, send switch indicating information to the first equipment and the second equipment;
The switch indicating information that the first equipment and the second equipment send according to the first Network Management Equipment, switched described uplink optical fibers link and downlink optical fiber link.
14. the system of definite equipment room link delay amount as claimed in claim 12, is characterized in that, the first equipment is switched described uplink optical fibers link and downlink optical fiber link, specifically comprises:
After the first equipment is determined the 4th time point information that receives the second message, send the 3rd message based on downlink optical fiber chain road direction the second equipment, after the handover request message sent at second equipment that receives, send switching response message based on downlink optical fiber chain road direction the second equipment, and after sending switching response message, described uplink optical fibers link and downlink optical fiber link are switched;
The second equipment is switched described uplink optical fibers link and downlink optical fiber link, specifically comprises:
After the second equipment receives the 3rd message of the first equipment based on the transmission of downlink optical fiber link, send handover request message based on uplink optical fibers chain road direction the first equipment, receive the switching response message that the first equipment sends based on the downlink optical fiber link, and after receiving described switching response message, described uplink optical fibers link and downlink optical fiber link are switched.
15. the system of definite equipment room link delay amount as claimed in claim 12, is characterized in that, described link delay amount determines that equipment is arranged in described the second equipment;
Each time point information that described the first equipment is determined sends to the second equipment by message respectively;
The second equipment, according to each time point information received and self each definite time point information, is determined respectively the link delay amount of described uplink optical fibers link and downlink optical fiber link.
16. the system of definite equipment room link delay amount as claimed in claim 12, is characterized in that, also comprises the second Network Management Equipment;
Each time point information that the first equipment and the second equipment will be determined sends to the second Network Management Equipment:
The second Network Management Equipment, for each time point information according to receiving, determine respectively the link delay amount of described uplink optical fibers link and downlink optical fiber link.
17. the system of definite equipment room link delay amount as claimed in claim 12, is characterized in that, also comprises synchronous processing equipment;
Described the first equipment is also for sending the first message based on downlink optical fiber chain road direction the second equipment, wherein carry the 9th time point information that sends the first message, receive the second message that the second equipment sends based on the uplink optical fibers link, determine the 12 time point information that receives the second message;
The first message that described the second equipment also sends based on the downlink optical fiber link for receiving the first equipment, determine the tenth time point information that receives described the first message, and send the second message based on uplink optical fibers chain road direction the first equipment, determine the 11 time dot information that sends the second message;
Described synchronous processing equipment, for according to described the 9th time point information, the tenth time point information, the 11 time dot information, the 12 time point information and the link delay compensation rate determined, by the second equipment and the first equipment time of carrying out/Phase synchronization processing.
18. the system of definite equipment room link delay amount as claimed in claim 12, is characterized in that, also comprises:
Time offset is determined equipment, for according to described very first time dot information, the second time point information, the 7th time point information and the 8th time point information, determines the time offset between described the first equipment and the second equipment;
Or, according to described the 3rd time point information, the 4th time point information, the 5th time point information and the 6th time point information, determine the time offset between described the first equipment and the second equipment.
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