CN111064507A - Method and device for detecting length of optical fiber link and terminal equipment - Google Patents
Method and device for detecting length of optical fiber link and terminal equipment Download PDFInfo
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- CN111064507A CN111064507A CN201911360172.9A CN201911360172A CN111064507A CN 111064507 A CN111064507 A CN 111064507A CN 201911360172 A CN201911360172 A CN 201911360172A CN 111064507 A CN111064507 A CN 111064507A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07955—Monitoring or measuring power
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Abstract
The embodiment of the invention provides a method, a device and terminal equipment for detecting the length of an optical fiber link, wherein the method comprises the following steps: the method comprises the steps of obtaining first equipment information and message information of first equipment to be measured, wherein the message information is message information of a communication message received and/or sent by the first equipment, determining second equipment directly connected with the first equipment through an optical fiber link according to the first equipment information and the message information, obtaining timestamp information of the communication message between the first equipment and the second equipment, calculating link delay according to the timestamp information, obtaining a refractive index corresponding to the optical fiber link, obtaining the length of the optical fiber link according to the link delay and the refractive index, and measuring the length of the optical fiber link between the first equipment and the second equipment by using an OTDR board card is not needed, so that the OTDR board card does not need to be purchased additionally to be deployed on the first equipment and the second equipment, and the cost for measuring the length of the optical fiber link is reduced.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a method and a device for detecting the length of an optical fiber link and terminal equipment.
Background
Optical fiber has the advantages of high anti-interference capability, high transmission rate, extremely low transmission error rate and the like in the signal transmission process, so that optical fiber communication becomes a main transmission mode of various communication networks and plays an important role in information highway construction. In various aspects, optical fiber testing, optical cable laying, fault checking, etc., measurement of the length of an optical fiber is involved.
In the prior art, when measuring the length of an optical fiber link between two link nodes, an optical time-domain reflectometer (OTDR) board needs to be deployed on the link node, and then the deployed OTDR board is used to measure the length of the optical fiber link.
However, the inventors found that at least the following problems exist in the prior art: when the OTDR board card is used to measure the length of the optical fiber link, the OTDR board card needs to be purchased, which increases the cost of measuring the length of the optical fiber link.
Disclosure of Invention
The embodiment of the invention provides a method and a device for detecting the length of an optical fiber link and terminal equipment, which are used for reducing the cost of measuring the length of the optical fiber link.
In a first aspect, an embodiment of the present invention provides a method for detecting a length of an optical fiber link, including:
acquiring first equipment information and message information of first equipment to be measured, wherein the message information is message information of a communication message received and/or sent by the first equipment;
determining second equipment directly connected with the first equipment through an optical fiber link according to the first equipment information and the message information;
acquiring timestamp information of a communication message between the first device and the second device, and calculating link time delay according to the timestamp information;
and acquiring the refractive index corresponding to the optical fiber link, and acquiring the length of the optical fiber link according to the link time delay and the refractive index.
In one possible design, after obtaining the length of the optical fiber link according to the link delay and the refractive index, the method further includes:
acquiring the entrance optical power and the exit optical power corresponding to the optical fiber link;
and generating a link quality report according to the entrance optical power, the exit optical power and the length of the optical fiber link.
In one possible design, the link quality report includes a link loss result;
generating a link quality report according to the ingress optical power, the egress optical power, and the length of the optical fiber link, comprising:
obtaining a difference value between the entrance optical power and the exit optical power to obtain an actual loss value of a link;
determining a link standard loss value according to a preset link parameter and the length of the optical fiber link;
if the actual loss value of the link is larger than the standard loss value of the link, determining that the loss result of the link is abnormal;
and if the actual loss value of the link is less than or equal to the standard loss value of the link, determining that the loss result of the link is normal.
In one possible design, the preset link parameters include a preset loss coefficient and a preset decision coefficient;
the determining a standard loss value of the link according to the preset link parameter and the length of the optical fiber link includes:
by passing
P＝γ·L·a
And determining the link standard loss value, wherein P is the link standard loss value, γ is the preset judgment coefficient, L is the length of the optical fiber link, and a is the preset loss coefficient.
In one possible design, after the determining that the link loss result is a loss anomaly, the method further includes:
and judging whether an attenuator exists in the optical fiber link or not.
In one possible design, the determining whether an attenuator is present in the optical fiber link includes:
acquiring a first difference value between the entrance optical power and the link standard loss value;
if the first difference is larger than the preset maximum outlet light power, determining that an attenuator exists in the optical fiber link;
and if the first difference is smaller than or equal to the preset maximum outlet light power, determining that no attenuator exists in the optical fiber link.
In one possible design, the length of the optical fiber link includes a first length of the optical fiber link in a first communication direction and/or a second length of the optical fiber link in a second communication direction.
In one possible design, the first device information includes a first device identification; the message information comprises a sending equipment identifier and a receiving equipment identifier;
the determining, according to the first device information and the message information, a second device directly connected to the first device through an optical fiber link includes:
acquiring first message information with a sending equipment identifier as the first equipment identifier from the message information;
acquiring second message information with a receiving device identifier as the first device identifier from the message information;
and judging whether second message information with the same sending equipment identification and the receiving equipment identification exists or not aiming at the receiving equipment identification in each first message information, and if so, taking the equipment corresponding to the receiving equipment identification as second equipment.
In one possible design, the deriving the length of the optical fiber link according to the link delay and the refractive index includes:
by passing
Obtaining the length of the optical fiber link, wherein L is the length of the optical fiber link, and T isdelayAnd C is the preset vacuum light speed and n is the refractive index for the link time delay.
In a second aspect, an embodiment of the present invention provides an optical fiber link length detection apparatus, including:
the information acquisition module is used for acquiring first equipment information and message information of first equipment to be measured, wherein the message information is message information of a communication message received and/or sent by the first equipment;
the device determining module is used for determining second devices which are directly connected with the first devices through optical fiber links according to the first device information and the message information;
the time delay calculation module is used for acquiring timestamp information of a communication message between the first equipment and the second equipment and calculating link time delay according to the timestamp information;
and the length obtaining module is used for obtaining the refractive index corresponding to the optical fiber link and obtaining the length of the optical fiber link according to the link time delay and the refractive index.
In one possible design, the apparatus further includes a quality report generation module;
the quality report generating module is configured to obtain an entrance optical power and an exit optical power corresponding to the optical fiber link after obtaining the length of the optical fiber link according to the link delay and the refractive index;
and generating a link quality report according to the entrance optical power, the exit optical power and the length of the optical fiber link.
In one possible design, the link quality report includes a link loss result;
the quality report generation module is specifically configured to:
obtaining a difference value between the entrance optical power and the exit optical power to obtain an actual loss value of a link;
determining a link standard loss value according to a preset link parameter and the length of the optical fiber link;
if the actual loss value of the link is larger than the standard loss value of the link, determining that the loss result of the link is abnormal;
and if the actual loss value of the link is less than or equal to the standard loss value of the link, determining that the loss result of the link is normal.
In one possible design, the preset link parameters include a preset loss coefficient and a preset decision coefficient;
the quality report generation module is specifically configured to:
by passing
P＝γ·L·a
And determining the link standard loss value, wherein P is the link standard loss value, γ is the preset judgment coefficient, L is the length of the optical fiber link, and a is the preset loss coefficient.
In one possible design, the quality report generation module is further to: and after the link loss result is determined to be loss abnormity, judging whether an attenuator exists in the optical fiber link.
In one possible design, the quality report generation module is further specifically configured to: acquiring a first difference value between the entrance optical power and the link standard loss value;
if the first difference is larger than the preset maximum outlet light power, determining that an attenuator exists in the optical fiber link;
and if the first difference is smaller than or equal to the preset maximum outlet light power, determining that no attenuator exists in the optical fiber link.
In one possible design, the length of the optical fiber link includes a first length of the optical fiber link in a first communication direction and/or a second length of the optical fiber link in a second communication direction.
In one possible design, the first device information includes a first device identification; the message information comprises a sending equipment identifier and a receiving equipment identifier.
The device determination module is specifically configured to:
acquiring first message information with a sending equipment identifier as the first equipment identifier from the message information;
acquiring second message information with a receiving device identifier as the first device identifier from the message information;
and judging whether second message information with the same sending equipment identification and the receiving equipment identification exists or not aiming at the receiving equipment identification in each first message information, and if so, taking the equipment corresponding to the receiving equipment identification as second equipment.
In one possible design, the length obtaining module is specifically configured to:
by passing
Obtaining the length of the optical fiber link, wherein L is the length of the optical fiber link, and T isdelayAnd C is the preset vacuum light speed and n is the refractive index for the link time delay.
In a third aspect, an embodiment of the present invention provides a terminal device, including: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing the computer-executable instructions stored by the memory causes the at least one processor to perform the optical fiber link length detection method of any of the first aspects.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer executes instructions, and when a processor executes the computer to execute the instructions, the method for detecting a length of an optical fiber link according to any one of the first aspect is implemented.
The method determines the second equipment directly connected with the first equipment through the optical fiber link according to the first equipment information and the message information of the first equipment to be measured, realizes the automatic determination of the second equipment, does not need to manually select the second equipment, when the length of an optical fiber link between first equipment and second equipment needs to be measured, firstly determining the link delay through timestamp information of a communication message when the first equipment and the second equipment are in communication, then the length of the optical fiber link is obtained according to the link time delay and the refractive index corresponding to the optical fiber link, the length of the optical fiber link between the first equipment and the second equipment is not required to be measured by an OTDR board card, therefore, an OTDR board card does not need to be additionally purchased to be deployed on the first equipment and the second equipment, and the cost for measuring the length of the optical fiber link is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an optical fiber link length detection system according to an embodiment of the present invention;
fig. 2 is a first flowchart of a line loss information obtaining method according to an embodiment of the present invention;
fig. 3 is a second flowchart of a line loss information obtaining method according to an embodiment of the present invention;
fig. 4 is a first schematic structural diagram of a line loss information acquiring apparatus according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a line loss information acquiring apparatus according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a hardware structure of a terminal device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic diagram of an architecture of an optical fiber link length detection system according to an embodiment of the present invention, and as shown in fig. 1, the system includes a terminal device 100, when a user wants to measure a length of an optical fiber link where a certain device is located, the user can send or input a corresponding request to the terminal device 100, and the terminal device 100 determines a first device to be measured according to the request. After second equipment directly connected with first equipment through an optical fiber link is determined, when the length of the optical fiber link between the first equipment 101 and the second equipment 102 is measured, terminal equipment acquires a communication message generated when the first equipment 101 and the second equipment 102 are communicated, link time delay is determined according to timestamp information of the communication message, then the length of the optical fiber link is obtained according to the link time delay and a refractive index corresponding to the optical fiber link, and an OTDR board is not required to be used for measuring the length of the optical fiber link between the first equipment and the second equipment, so that the OTDR board is not required to be additionally purchased to deploy the OTDR board on the first equipment and the second equipment, and the cost for measuring the length of the optical fiber link is reduced.
The determination of the link delay and the calculation of the length of the optical fiber link may be performed on the same terminal device, or may be performed on different terminals, for example, the link delay is determined on a Boundary Clock (BC) node, the boundary clock node sends the link delay to a network management device or a controller, and then the length of the optical fiber link is calculated on the network management device or the controller.
The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 2 is a first flowchart of a method for detecting a length of an optical fiber link according to an embodiment of the present invention, where the method of this embodiment is applied to a terminal device shown in fig. 1, and as shown in fig. 2, the method of this embodiment may include:
s201: acquiring first equipment information and message information of first equipment to be measured, wherein the message information is message information of a communication message received and/or sent by the first equipment.
When a user wants to measure the length of an optical fiber link between first equipment and other equipment on the optical fiber link where the first equipment is located, a corresponding request is sent to terminal equipment, and the terminal equipment takes the first equipment as equipment to be measured according to the request. Since the length of the optical fiber link refers to the length of the optical fiber link between two nodes, it is necessary to determine a second device directly connected to the first device through the optical fiber link.
When determining a second device directly connected to the first device through an optical fiber link, first device information and message information of the first device need to be utilized, where the message information is message information of a communication message received and/or sent by the first device.
When the optical fiber link between the first device and the second device is a bidirectional communication link, that is, the first device may be a receiving end or a transmitting end, it is necessary to acquire message information of a communication message received and transmitted by the first device.
When the optical fiber link where the first device is located is a unidirectional communication link and the first device is a sending end, only the message information of the communication message sent by the first device needs to be acquired.
When the optical fiber link where the first device is located is a unidirectional communication link and the first device is a receiving end, only the message information of the communication message received by the first device needs to be acquired.
The first device information comprises a first device identifier, and the message information comprises a sending device identifier and a receiving device identifier.
For convenience of description, the optical fiber link where the first device is located is defined as a bidirectional communication link, that is, the first device may receive communication messages sent by other devices, and may also send communication messages to other devices. Accordingly, when the optical fiber link is a bidirectional communication link, the length of the optical fiber link includes a first length of the optical fiber link in a first communication direction and/or a second length of the optical fiber link in a second communication direction. In practical applications, the optical fiber link in which the first device is located may also be a unidirectional communication link.
S202: and determining second equipment directly connected with the first equipment through an optical fiber link according to the first equipment information and the message information.
In this embodiment, when the optical fiber link is bidirectional link communication, there may be information interaction between the first device and the second device, that is, the first device may not only send a communication packet to the second device, but also receive communication sent by the second device. Therefore, the second device having information interaction with the first device, that is, the second device directly connected to the first device through the bidirectional communication link, may be determined through the message information of the communication packet sent and received by the first device.
Optionally, determining, according to the first device information and the message information, a second device directly connected to the first device through an optical fiber link includes:
and acquiring first message information with the sending equipment identifier as the first equipment identifier from the message information.
And acquiring second message information with the receiving equipment identification as the first equipment identification from the message information.
And judging whether second message information with the same sending equipment identification and the receiving equipment identification exists or not aiming at the receiving equipment identification in each first message information, and if so, taking the equipment corresponding to the receiving equipment identification as second equipment.
The method comprises the steps of obtaining first message information with a sending device identifier as a first device identifier from message information of a first device, wherein the first message information is message information of a communication message sent by the first device, and obtaining second message information with a receiving device identifier as the first device identifier from the message information of the first device, wherein the second message information is message information of the communication message received by the first device. When the receiving device identifier in the first message information is also the sending device identifier in the second message information, that is, the receiving device identifier is the same as the sending device identifier, the device corresponding to the receiving device identifier or the sending device identifier is identified as the second device, that is, the second device having information interaction with the first device.
S203: and acquiring timestamp information of a communication message between the first equipment and the second equipment, and calculating the link delay according to the timestamp information.
In this embodiment, the timestamp information of the communication packet includes transmission timestamp information of the communication packet and reception timestamp information of the communication packet. The transmission time stamp information indicates a time when the communication packet is transmitted, and the reception time stamp information indicates a time when the communication packet is received.
In this embodiment, since the optical fiber link where the first device is located is a bidirectional communication link, it is necessary to determine the length of the optical fiber link in the first communication direction and the length of the optical fiber link in the second communication direction, and accordingly, the link delay includes a link delay in the first communication direction and a link delay in the second communication direction.
And when determining the link delay in the first communication direction, acquiring the communication message of which the sending equipment identifier is the first equipment identifier and the receiving equipment identifier is the second equipment identifier, and selecting any two communication messages from the communication messages as a first target communication message and a second target communication message. And determining the link time delay in the first communication direction according to the timestamp information of the first target communication message and the second target communication message.
Determining link delay in a first communication direction according to timestamp information of a first target communication message and a second target communication message, including:
by passing
Calculating a link delay in a first communication direction, wherein T1' is a link delay in the first communication direction, T2 is receiving timestamp information of the first target communication packet, T1 is transmitting timestamp information of the first target communication packet, T4 is receiving timestamp information of the second target communication packet, and T3 is transmitting timestamp information of the second target communication packet.
Accordingly, when determining the link delay in the second communication direction, the link delay in the second communication direction may also be calculated according to the above calculation procedure for calculating the link time in the first communication direction.
Optionally, when the first device and the second device perform message interaction, the communication message performed by the first device and the second device may be obtained through a PTP port on the terminal.
The link delay calculated by the timestamp information is not an accurate delay value of the optical fiber link, and includes a delay value inside a PTP (Precision Time Protocol) interface on the terminal device and a synchronization error value due to line asymmetry. In order to improve the accuracy of the length of the optical fiber link calculated according to the link delay, the link delay can be corrected, the corrected link delay is closer to the actual time delay of the optical fiber link, and then the corrected link delay is used for calculating the length of the related link.
The internal time delay of the PTP interface is related to hardware included in the terminal device, and can be obtained by measuring with a time analyzer, and the specific process includes: the PTP measuring interface of the time analyzer is connected with the PTP interface of the terminal equipment, the working mode of the PTP interface of the terminal equipment is configured to be a master clock working mode, the working mode of the PTP measuring interface of the time analyzer is configured to be a slave clock working mode, and after a certain time (for example, 10 minutes), the time delay value collected by the time analyzer can be read to obtain the internal time delay value.
Based on the measurement principle of the PTP protocol, a precondition for accurately calculating the link delay value is that the lengths of the optical fiber links in the transmitting and receiving directions of the measured optical fiber links are equal, and if the lengths of the optical fiber links in the transmitting and receiving directions of the measured optical fiber links are not equal, that is, the lines are asymmetric, the link delay value calculated by the timestamp information is inaccurate, and therefore, a synchronization error value caused by the asymmetry of the lines needs to be obtained. The synchronous error value caused by the asymmetry of the optical fiber link connected with the PTP interface of the terminal equipment can be obtained by a synchronous instrument measurement related device.
When correcting the link delay in the first communication direction, according to Tdelay1＝T1′-TInt-TAsy2 calculating the corrected link delay, wherein Tdelay1For modified link delay, T, in the first direction of communication1' is the link delay, T, in the first communication directionIntIs an internal time delay value, TAsyIs the synchronization error value.
When correcting the link time delay in the second communication direction, according to Tdelay2＝T2′-TInt+TAsy2 calculating the corrected link delay, wherein Tdelay2For the modified link delay, T, in the second communication direction2Is' the second communication partyUpward link delay, TIntIs an internal time delay value, TAsyIs the synchronization error value.
For example, when the first device first sends a message to the second device, the communication direction from the first device to the second device is the first communication direction, and the communication direction from the second device to the first device is the second communication direction, or the input end and the output end in the first device and the second device may be directly determined through a network topology structure, where the direction from the input end to the output end is the first communication direction, and the direction from the output end to the input end is the second communication direction, where the manner of determining the communication direction is not determined.
S204: and acquiring the refractive index corresponding to the optical fiber link, and acquiring the length of the optical fiber link according to the link time delay and the refractive index.
In this embodiment, since the refractive index corresponding to the optical fiber link is also required to be used to calculate the length of the optical fiber link, the refractive index corresponding to the optical fiber link needs to be obtained first.
When the requirement on the measurement accuracy of the length of the optical fiber link is high, the wavelength information of the optical wave transmitted by the optical fiber link laser can be determined, the wavelength information of the optical wave is obtained, and then the refractive index in the first communication direction and the refractive index in the second communication direction corresponding to the wavelength information are searched.
In order to improve the obtaining efficiency of the refractive index of the optical fiber link and further improve the determining efficiency of the length of the optical fiber link, the standard refractive index may be directly used as the refractive index corresponding to the optical fiber link.
The specific process of obtaining the length of the optical fiber link according to the link delay and the refractive index comprises the following steps:
by passing
Obtaining the length of the optical fiber link, wherein L is the length of the optical fiber link, TdelayDelaying for linksC is the preset vacuum light speed, and n is the refractive index.
Optionally, when the length of the optical fiber link is the length of the optical fiber link in the first communication direction, TdelayN is a refractive index in the first communication direction, which is a link delay in the first communication direction.
As can be seen from the above description, when the length of the optical fiber link between the first device and the second device needs to be measured, the link delay is determined according to the timestamp information of the communication packet when the first device and the second device are in communication, and then the length of the optical fiber link is obtained according to the link delay and the refractive index corresponding to the optical fiber link, so that an OTDR board does not need to be additionally purchased to deploy the OTDR board on the first device and the second device, thereby reducing the cost for measuring the length of the optical fiber link.
After the length of the optical fiber link between the first device and the second device is obtained, the quality condition of the optical fiber link may be determined according to the length, and a corresponding link quality report is generated, so that a user can know the condition of the optical fiber link and determine whether maintenance is required for the optical fiber link.
Fig. 3 is a second flowchart of a line loss information obtaining method according to an embodiment of the present invention, and as shown in fig. 3, on the basis of the foregoing embodiment, a process of generating a link quality report of an optical fiber link according to a length of the optical fiber link is described in detail, where the method according to this embodiment includes:
s301: acquiring first equipment information and message information of first equipment to be measured, wherein the message information is message information of a communication message received and/or sent by the first equipment.
S302: and determining second equipment directly connected with the first equipment through an optical fiber link according to the first equipment information and the message information.
S303: and acquiring timestamp information of a communication message between the first equipment and the second equipment, and calculating the link delay according to the timestamp information.
S304: and acquiring the refractive index corresponding to the optical fiber link, and acquiring the length of the optical fiber link according to the link time delay and the refractive index.
The implementation processes of S301 to S304 in this embodiment are similar to the processes of S201 to S204 in the embodiment of fig. 2, and are not described herein again.
S305: and acquiring the corresponding entrance optical power and exit optical power of the optical fiber link.
In this embodiment, the ingress optical power and the egress optical power corresponding to the optical fiber link between the first device and the second device are obtained, and the ingress optical power and the egress optical power are actually transceiving optical powers and are related to the communication direction.
When it is determined that the optical fiber link is reporting the link quality in the first communication direction, the power of the light output by the first device is taken as the ingress optical power, and the power of the light received by the second device is taken as the egress optical power. Accordingly, when determining the link quality report of the optical fiber link in the second communication direction, the power of the light output by the second device is taken as the entrance optical power, and the power of the light received by the first device is taken as the exit optical power.
The entrance optical power and the exit optical power can be collected by the relevant collection devices, and when the relevant collection devices collect the entrance optical power and the exit optical power, the entrance optical power and the exit optical power can be transmitted to the database through the southward interface, and when the terminal equipment needs to be utilized, the entrance optical power and the exit optical power can be acquired from the database.
S306: a link quality report is generated based on the ingress optical power, the egress optical power, and the length of the optical fiber link.
Wherein the link quality report comprises a link quality report for the optical fiber link in the first communication direction and a link quality report for the optical fiber link in the second communication direction.
When determining that the optical fiber link has the link quality report in the first communication direction, generating the link quality report in the first communication direction for the optical fiber link according to the ingress optical power, the egress optical power and the length of the optical fiber link corresponding to the first communication direction, and correspondingly, generating the link quality report in the second communication direction for the optical fiber link according to the ingress optical power, the egress optical power and the length of the optical fiber link corresponding to the second communication direction.
Optionally, after the link quality report is generated, the link quality report may be directly displayed or sent to a preset terminal, so that a worker corresponding to the preset terminal may know the condition of the optical fiber link or maintain the optical fiber link according to the link quality report.
For ease of understanding, when the following description is made, the link quality report is a link quality report on the optical fiber link in the first communication direction.
Wherein the link quality report includes the link loss result. The link loss results include loss anomaly and loss normality.
Optionally, generating a link quality report according to the ingress optical power, the egress optical power, and the length of the optical fiber link includes:
and obtaining the difference value of the entrance optical power and the exit optical power to obtain the actual loss value of the link.
And determining a standard loss value of the link according to the preset link parameters and the length of the optical fiber link.
And if the actual loss value of the link is larger than the standard loss value of the link, determining that the loss result of the link is abnormal.
And if the actual loss value of the link is less than or equal to the standard loss value of the link, determining that the loss result of the link is normal.
In this embodiment, a difference between the entrance optical power and the exit optical power is calculated to obtain an actual link loss value of the optical fiber link between the first device and the second device, and then a link standard loss value of the optical fiber link is determined according to a preset link parameter and a length of the optical fiber link, where the link standard loss value is a theoretical loss value of the optical fiber link.
Wherein, the difference value between the entrance optical power and the exit optical power is the difference value obtained by subtracting the exit optical power from the entrance optical power.
And when the actual loss value of the link is larger than the standard loss value of the link, the actual loss of the optical fiber link is higher than the theoretical loss of the optical fiber link, and the loss of the optical fiber link is abnormal, and the loss result of the link is determined to be abnormal loss. And when the actual loss value of the link is smaller than or equal to the standard loss value of the link, the actual loss of the optical fiber link is not higher than the theoretical loss of the optical fiber link, and the loss of the optical fiber link is normal, and the loss result of the link is determined to be normal.
The preset link parameters comprise a preset loss coefficient and a preset judgment coefficient.
Determining a standard loss value of the link according to preset link parameters and the length of the optical fiber link, wherein the standard loss value of the link comprises the following steps:
by passing
P＝γ·L·a
And determining a link standard loss value, wherein P is the link standard loss value, gamma is a preset judgment coefficient, L is the length of the optical fiber link, and a is a preset loss coefficient.
Optionally, after determining that the link loss result is a loss anomaly, the method may further include: and judging whether the attenuator exists in the optical fiber link or not.
In this embodiment, after determining that the link loss result corresponding to the optical fiber link is a loss anomaly, it may be determined whether the link loss of the optical fiber link is too high, that is, the loss anomaly, due to the presence of the attenuator in the optical fiber link.
Wherein, judge whether there is attenuator in the fiber link, include:
a first difference between an ingress optical power and a link standard loss value is obtained.
And if the first difference is larger than the preset maximum outlet optical power, determining that an attenuator exists in the optical fiber link.
And if the first difference is smaller than or equal to the preset maximum outlet light power, determining that no attenuator exists in the optical fiber link.
The preset maximum outlet optical power is set according to the actual condition of the optical fiber link, when an attenuator exists on the optical fiber link, the set maximum outlet optical power is smaller, and when the attenuator does not exist on the optical fiber link, the set maximum outlet optical power is larger.
In this embodiment, a difference between an entrance optical power and a link standard loss value is calculated to obtain a first difference, where the first difference represents a theoretical exit optical power corresponding to the entrance optical power, and when the first difference is greater than a preset maximum exit optical power, the first difference represents that the theoretical exit optical power corresponding to the entrance optical power is greater than the maximum exit optical power corresponding to the optical fiber link, so that it may be determined that an attenuator exists in the optical fiber link, and the link loss of the optical fiber link is abnormal because the attenuator is inserted into the optical fiber link.
When the first difference is smaller than or equal to the preset maximum exit optical power, it indicates that the theoretical exit optical power corresponding to the entrance optical power is smaller than or equal to the maximum exit optical power corresponding to the optical fiber link, and it may be determined that no attenuator exists in the optical fiber link, that is, the link loss abnormality of the optical fiber link is not due to insertion of an attenuator in the optical fiber link.
Optionally, the link quality report may further include a loss anomaly reason, and when it is determined that the link loss result corresponding to the optical fiber link is loss anomaly, if it is determined that the loss anomaly result is caused by the presence of the attenuator in the optical fiber link, the loss anomaly reason is caused by insertion of the attenuator.
In this embodiment, when the length of the optical fiber link is calculated and a link quality report is generated, and when required information needs to be acquired, the required information may be directly acquired from a database, where the database is divided into a dynamic update area and a static data area, and the dynamic update area may receive and update data in real time for real-time comparison analysis application, for example, after the length of the optical fiber link is calculated, the data may be stored in the dynamic update area. The static data area retains data which is manually verified, or adopts an automatic timing retention mode to store the static data. Static data can be time stamped to leave multiple copies and viewed. Such as the ingress optical power and the egress optical power of the link.
The database can also be used by other systems or terminals to realize data sharing.
In this embodiment, after the length of the optical fiber link is determined, a link quality report corresponding to the optical fiber link may be generated according to the length of the optical fiber link and the ingress optical power and the egress optical power corresponding to the optical fiber link, so as to achieve automatic generation of the link quality report, and facilitate a user to know the quality condition of the optical fiber link.
Fig. 4 is a schematic structural diagram of an optical fiber link length detection apparatus according to an embodiment of the present invention, and as shown in fig. 4, an optical fiber link length detection apparatus 400 according to this embodiment may include: an information acquisition module 401, a device determination module 402, a time delay calculation module 403, and a length acquisition module 404.
The information obtaining module 401 is configured to obtain first device information and message information of a first device to be measured, where the message information is message information of a communication message received and/or sent by the first device.
The device determining module 402 is configured to determine, according to the first device information and the message information, a second device directly connected to the first device through an optical fiber link.
The delay calculating module 403 is configured to obtain timestamp information of a communication packet between the first device and the second device, and calculate a link delay according to the timestamp information.
The length obtaining module 404 is configured to obtain a refractive index corresponding to the optical fiber link, and obtain the length of the optical fiber link according to the link delay and the refractive index.
In one possible design, the length of the optical fiber link includes a first length of the optical fiber link in the first communication direction and/or a second length of the optical fiber link in the second communication direction.
In one possible design, the first device information includes a first device identification. The message information includes a sending device identification and a receiving device identification.
The device determination module is specifically configured to:
and acquiring first message information with the sending equipment identifier as the first equipment identifier from the message information.
And acquiring second message information with the receiving equipment identification as the first equipment identification from the message information.
And judging whether second message information with the same sending equipment identification and the receiving equipment identification exists or not aiming at the receiving equipment identification in each first message information, and if so, taking the equipment corresponding to the receiving equipment identification as second equipment.
In one possible design, the length acquisition module is specifically configured to:
by passing
Obtaining the length of the optical fiber link, wherein L is the length of the optical fiber link, TdelayFor link delay, C is the preset vacuum light speed, and n is the refractive index.
The optical fiber link length detection device provided in the embodiment of the present invention can implement the optical fiber link length detection method according to the embodiment shown in fig. 2, and the implementation principle and technical effect are similar, which are not described herein again.
Fig. 5 is a schematic structural diagram of a second optical fiber link length detection apparatus according to an embodiment of the present invention, and as shown in fig. 5, on the basis of the foregoing apparatus embodiment, the optical fiber link length detection apparatus according to the embodiment may further include: quality report generation module 404.
The quality report generating module is used for acquiring the entrance optical power and the exit optical power corresponding to the optical fiber link after the length of the optical fiber link is obtained according to the link delay and the refractive index.
A link quality report is generated based on the ingress optical power, the egress optical power, and the length of the optical fiber link.
In one possible design, the link quality report includes a link loss result.
The quality report generation module is specifically configured to:
and obtaining the difference value of the entrance optical power and the exit optical power to obtain the actual loss value of the link.
And determining a standard loss value of the link according to the preset link parameters and the length of the optical fiber link.
And if the actual loss value of the link is larger than the standard loss value of the link, determining that the loss result of the link is abnormal.
And if the actual loss value of the link is less than or equal to the standard loss value of the link, determining that the loss result of the link is normal.
In one possible design, the predetermined link parameters include a predetermined loss factor and a predetermined decision factor.
The quality report generation module is specifically configured to:
by passing
P＝γ·L·a
And determining a link standard loss value, wherein P is the link standard loss value, gamma is a preset judgment coefficient, L is the length of the optical fiber link, and a is a preset loss coefficient.
In one possible design, the quality report generation module is further to: and after determining that the link loss result is loss abnormity, judging whether the attenuator exists in the optical fiber link.
In one possible design, the quality report generation module is further specifically configured to: a first difference between an ingress optical power and a link standard loss value is obtained.
And if the first difference is larger than the preset maximum outlet optical power, determining that an attenuator exists in the optical fiber link.
And if the first difference is smaller than or equal to the preset maximum outlet light power, determining that no attenuator exists in the optical fiber link.
The optical fiber link length detection device provided in the embodiment of the present invention can implement the optical fiber link length detection method according to the embodiment shown in fig. 3, and the implementation principle and technical effect are similar, which are not described herein again.
Fig. 6 is a schematic diagram of a hardware structure of a terminal device according to an embodiment of the present invention. As shown in fig. 6, the present embodiment provides a vehicle 600 including: at least one processor 601 and memory 602. The processor 601 and the memory 602 are connected by a bus 603.
In a specific implementation process, the at least one processor 601 executes the computer-executable instructions stored in the memory 602, so that the at least one processor 601 executes the optical fiber link length detection method in the above method embodiment.
For a specific implementation process of the processor 601, reference may be made to the above method embodiments, which implement the principle and the technical effect similarly, and details of this embodiment are not described herein again.
In the embodiment shown in fig. 6, it should be understood that the Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.
The memory may comprise high speed RAM memory and may also include non-volatile storage NVM, such as at least one disk memory.
The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present application are not limited to only one bus or one type of bus.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer execution instruction is stored in the computer-readable storage medium, and when a processor executes the computer execution instruction, the method for detecting a length of an optical fiber link according to the above-mentioned method embodiment is implemented.
The computer-readable storage medium may be implemented by any type of volatile or non-volatile memory device or combination thereof, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk. Readable storage media can be any available media that can be accessed by a general purpose or special purpose computer.
An exemplary readable storage medium is coupled to the processor such the processor can read information from, and write information to, the readable storage medium. Of course, the readable storage medium may also be an integral part of the processor. The processor and the readable storage medium may reside in an Application Specific Integrated Circuits (ASIC). Of course, the processor and the readable storage medium may also reside as discrete components in the apparatus.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (15)
1. A method for detecting a length of an optical fiber link, the method comprising:
acquiring first equipment information and message information of first equipment to be measured, wherein the message information is message information of a communication message received and/or sent by the first equipment;
determining second equipment directly connected with the first equipment through an optical fiber link according to the first equipment information and the message information;
acquiring timestamp information of a communication message between the first device and the second device, and calculating link time delay according to the timestamp information;
and acquiring the refractive index corresponding to the optical fiber link, and acquiring the length of the optical fiber link according to the link time delay and the refractive index.
2. The method of claim 1, wherein after said deriving the length of the fiber link from the link delay and the refractive index, further comprising:
acquiring the entrance optical power and the exit optical power corresponding to the optical fiber link;
and generating a link quality report according to the entrance optical power, the exit optical power and the length of the optical fiber link.
3. The method of claim 2, wherein the link quality report includes a link loss result;
generating a link quality report according to the ingress optical power, the egress optical power, and the length of the optical fiber link, comprising:
obtaining a difference value between the entrance optical power and the exit optical power to obtain an actual loss value of a link;
determining a link standard loss value according to a preset link parameter and the length of the optical fiber link;
if the actual loss value of the link is larger than the standard loss value of the link, determining that the loss result of the link is abnormal;
and if the actual loss value of the link is less than or equal to the standard loss value of the link, determining that the loss result of the link is normal.
4. The method of claim 3, wherein the predetermined link parameters comprise a predetermined loss factor and a predetermined decision factor;
the determining a standard loss value of the link according to the preset link parameter and the length of the optical fiber link includes:
by passing
P＝γ·L·a
And determining the link standard loss value, wherein P is the link standard loss value, γ is the preset judgment coefficient, L is the length of the optical fiber link, and a is the preset loss coefficient.
5. The method of claim 3, further comprising, after determining that the link loss result is a loss anomaly:
and judging whether an attenuator exists in the optical fiber link or not.
6. The method of claim 5, wherein said determining whether a attenuator is present in said fiber link comprises:
acquiring a first difference value between the entrance optical power and the link standard loss value;
if the first difference is larger than the preset maximum outlet light power, determining that an attenuator exists in the optical fiber link;
and if the first difference is smaller than or equal to the preset maximum outlet light power, determining that no attenuator exists in the optical fiber link.
7. The method of claim 1, wherein the length of the optical fiber link comprises a first length of the optical fiber link in a first communication direction and/or a second length of the optical fiber link in a second communication direction.
8. The method of claim 1, wherein the first device information comprises a first device identification; the message information comprises a sending equipment identifier and a receiving equipment identifier;
the determining, according to the first device information and the message information, a second device directly connected to the first device through an optical fiber link includes:
acquiring first message information with a sending equipment identifier as the first equipment identifier from the message information;
acquiring second message information with a receiving device identifier as the first device identifier from the message information;
and judging whether second message information with the same sending equipment identification and the receiving equipment identification exists or not aiming at the receiving equipment identification in each first message information, and if so, taking the equipment corresponding to the receiving equipment identification as second equipment.
9. The method of claim 1, wherein said deriving the length of the fiber link from the link delay and the refractive index comprises:
by passing
Obtaining the length of the optical fiber link, wherein L is the length of the optical fiber link, and T isdelayAnd C is the preset vacuum light speed and n is the refractive index for the link time delay.
10. An optical fiber link length detection apparatus, the apparatus comprising:
the information acquisition module is used for acquiring first equipment information and message information of first equipment to be measured, wherein the message information is message information of a communication message received and/or sent by the first equipment;
the device determining module is used for determining second devices which are directly connected with the first devices through optical fiber links according to the first device information and the message information;
the time delay calculation module is used for acquiring timestamp information of a communication message between the first equipment and the second equipment and calculating link time delay according to the timestamp information;
and the length obtaining module is used for obtaining the refractive index corresponding to the optical fiber link and obtaining the length of the optical fiber link according to the link time delay and the refractive index.
11. The apparatus of claim 10, further comprising a quality report generation module;
the quality report generating module is configured to obtain an entrance optical power and an exit optical power corresponding to the optical fiber link after obtaining the length of the optical fiber link according to the link delay and the refractive index;
and generating a link quality report according to the entrance optical power, the exit optical power and the length of the optical fiber link.
12. The apparatus of claim 11, wherein the link quality report comprises a link loss result;
the quality report generation module is specifically configured to:
obtaining a difference value between the entrance optical power and the exit optical power to obtain an actual loss value of a link;
determining a link standard loss value according to a preset link parameter and the length of the optical fiber link;
if the actual loss value of the link is larger than the standard loss value of the link, determining that the loss result of the link is abnormal;
and if the actual loss value of the link is less than or equal to the standard loss value of the link, determining that the loss result of the link is normal.
13. The apparatus of claim 12, wherein the quality report generation module is further configured to: and after the link loss result is determined to be loss abnormity, judging whether an attenuator exists in the optical fiber link.
14. A terminal device, comprising: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing the computer-executable instructions stored by the memory causes the at least one processor to perform the optical fiber link length detection method of any of claims 1 to 9.
15. A computer-readable storage medium having computer-executable instructions stored thereon, which when executed by a processor, implement the optical fiber link length detection method of any one of claims 1 to 9.
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