A three-route optical line protection method based on OLP

Abstract

The present invention discloses a three-route optical line protection method based on OLP, which belongs to the field of optical line protection technology, including step 1, setting three optical fiber lines that are independent of each other in geographical location, each line is equipped with an optical fiber route; step 2, the OLP device is responsible for monitoring the operating parameter information of the three lines in operation, and analyzing the transmission quality of the main line according to the operating parameter information; step 3, determining the switching priority of the backup line according to the acquired operating parameter information and the environmental information of the optical fiber; step 4, selecting the best backup line for optical fiber transmission. The present invention analyzes the parameter information of the backup line during historical operation and the environmental information of the backup line to obtain the network transmission status value of the backup line, and selects the backup line with a smaller status value for priority switching, which can greatly improve the quality of data transmission, avoid the occurrence of data transmission interruption, and ensure the redundancy of the system.

Description

Technical Field

[0001] The invention belongs to the technical field of optical line protection, and in particular relates to a three-route optical line protection method based on OLP. Background Art

[0002] The OLP optical line protection system is located between the optical cable and the transmission system, ensuring that the backup optical cable line can be automatically switched in the event of a main optical cable interruption, thus ensuring the safe and stable operation of the transmission network.

[0003] Traditional OLP optical line protection technology usually adopts 1+1 or 1:1 protection configuration, that is, one working route plus one backup route, to ensure that the backup route can be switched to when the main route fails. Although this method can reduce the risk of network failure to a certain extent, it is affected by factors such as the environment. When the transmission condition of the backup line is also poor, although it can reduce certain network anomalies after switching, the data transmission efficiency is not efficient enough, resulting in low system redundancy. Summary of the invention

[0004] The purpose of the present invention is to provide a three-route optical line protection method based on OLP to solve the problems faced in the above background technology.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A three-route optical line protection method based on OLP, the protection method comprising:

[0007] Step 1: Set up three optical fiber lines that are geographically independent of each other, each line is equipped with an optical fiber route, one of the optical fiber lines is the main line, and the other two are backup lines;

[0008] Step 2: The OLP device is responsible for monitoring the operating parameter information of the main line and the backup line in operation, and analyzes the transmission quality of the main line according to the operating parameter information to determine whether a switching instruction needs to be generated;

[0009] Step 3: Determine the switching priority of the backup line according to the acquired operating parameter information and the environment information of the optical fiber;

[0010] Step 4: Select the best backup line for optical fiber transmission according to the switching instruction.

[0011] Furthermore, the operating parameter information includes: received optical power, bit error rate, packet loss rate, transmission rate, the time taken for data to travel from the sending end to the receiving end, the temperature of the optical fiber itself, and the optical fiber loss value. The environmental information is obtained through the local meteorological bureau, and the environmental information includes temperature information, humidity information, and rainfall information.

[0012] Furthermore, the method for determining whether to generate a switching instruction in step 2 is:

[0013] Get the received optical power P of the optical fiber during main line transmission L , bit error rate BER, the time it takes for data to travel from the sender to the receiver T L , packet loss rate LR and transmission rate V;

[0014] Substitute the obtained parameters into the formula Obtaining a data transmission quality evaluation value Da;

[0015] The obtained data transmission quality evaluation value Da is compared with the data transmission quality evaluation threshold Da preset by the system th To compare:

[0016] When Da>Da th When it is judged that the data transmission is abnormal, a switching instruction is generated;

[0017] in, The standard time used by the system to set the data transmission end to the receiving end. The average received optical power set for the system.

[0018] Furthermore, the method for determining whether to generate a switching instruction in step 2 further includes:

[0019] When it is determined that no abnormality occurs in data transmission, the data transmission quality evaluation value obtained within a preset period ΔT is obtained, so as to formulate a data transmission quality evaluation value versus time curve Da(t);

[0020] So through the formula Obtain the risk warning coefficient Φ of data transmission;

[0021] When Φ>1, a switching instruction is generated;

[0022] Among them, t x is the start time of the preset cycle, t y is the end time of the preset cycle, Da th (t) is the time-varying curve of the standard data transmission quality evaluation value preset by the system, A is the jitter coefficient, GEN th The risk warning threshold preset for the system.

[0023] Furthermore, the method for obtaining the jitter coefficient is:

[0024] Get the time it takes for data to travel from the sender to the receiver each time within the preset period ΔT

[0025] So through the formula Get the jitter coefficient;

[0026] in, n is the total number of data transmission and reception within a preset period, and i∈[1,n].

[0027] Furthermore, the method for determining the switching priority of the standby line in step 3 is:

[0028] Obtain the fiber loss value changes and temperature changes of the backup line during historical operation, so as to formulate the fiber loss value vs. transmission distance curve AC(s) and the temperature vs. time curve T self (t);

[0029] By formula Get the status value K of each backup line;

[0030] Select the backup line with the smallest status value K for priority switching;

[0031] Among them, τ1 and τ2 are proportional coefficients, s1 is the initial distance of transmission, s2 is the end distance of transmission, ΔAC is the preset optical fiber loss reference value, It is the standard temperature change curve preset by the system over time, t1 is the start time of historical detection, t2 is the end time of historical detection, and α is the environmental impact coefficient.

[0032] Furthermore, the method for obtaining the environmental impact coefficient is:

[0033] Get the average humidity H for the day N , average temperature T N And the average precipitation W N , and obtain the average humidity H in the previous week O , average temperature T O And the average precipitation W O ;

[0034] Then the environmental impact coefficient α is calculated by the following formula;

[0035]

[0036] in, The optimal daily humidity preset for the system. The optimal daily temperature preset by the system. The optimal daily precipitation preset by the system. The optimal weekly humidity preset for the system. The optimal weekly temperature preset for the system. The optimal weekly precipitation preset by the system.

[0037] Beneficial effects of the present invention:

[0038] The present invention adopts three routes to protect the optical line, and the optical fiber lines of the three routes are independent of each other in geographical location. By monitoring the operating parameter information of the main line, a data transmission quality judgment value and a risk warning coefficient are generated, and the data transmission quality judgment value and the risk warning coefficient are used to judge whether the data transmission of the main line has an abnormal risk. In this way, not only the data transmission abnormality of the main line can be monitored in real time, but also the potential abnormality of the main line can be monitored, so as to more accurately judge the transmission situation of the main line and reduce the occurrence of data transmission abnormality.

[0039] After detecting that the data transmission of the main line is abnormal, the present invention can analyze the parameter information of the backup line during historical operation and the environmental information of the backup line to obtain the network transmission status value of the backup line, and select the backup line with a smaller status value for priority switching, which can greatly improve the quality of data transmission, avoid the occurrence of data transmission interruption, and ensure the redundancy and availability of the system.

[0040] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0042] Figure 1 The present invention is a flow chart of the method. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] In one embodiment, a three-route optical line protection method based on OLP is disclosed, such as Figure 1 As shown, the protection method includes:

[0045] Step 1: Set up three optical fiber lines that are geographically independent of each other, each line is equipped with an optical fiber route, one of the optical fiber lines is the main line, and the other two are backup lines;

[0046] Step 2: The OLP device is responsible for monitoring the operating parameter information of the main line and the backup line during operation, and analyzes the transmission quality of the main line according to the operating parameter information to determine whether a switching instruction needs to be generated. The operating parameter information includes received optical power, bit error rate, packet loss rate, transmission rate, the time taken for data to travel from the sender to the receiver, the fiber temperature, and the fiber loss value.

[0047] Step 3: Determine the switching priority of the backup line based on the acquired operating parameter information and the environmental information of the optical fiber. The environmental information is obtained through the local meteorological bureau, and the environmental information includes temperature information, humidity information, and rainfall information;

[0048] Step 4: Select the best backup line for optical fiber transmission according to the switching instruction.

[0049] Through the above technical scheme, the present application adopts three routes to protect the optical line, and the optical fiber lines of the three routes are independent of each other in geographical location. By monitoring the operating parameter information of the main line, a data transmission quality judgment value and a risk warning coefficient are generated, and the data transmission quality judgment value and the risk warning coefficient are used to judge whether there is an abnormal risk in the data transmission of the main line. In this way, not only the abnormal situation of the data transmission of the main line can be monitored in real time, but also the potential abnormal situation of the main line can be monitored, and the transmission situation of the main line can be judged more accurately, thereby reducing the occurrence of data transmission abnormalities; when the data transmission of the main line is detected to be abnormal, the network transmission status value of the backup line can be judged according to the parameter information of the backup line during the historical operation and the environmental information of the backup line, and the backup line with a smaller status value can be selected for priority switching, which can greatly improve the quality of data transmission, avoid the occurrence of data transmission interruption, and ensure the redundancy and availability of the system.

[0050] As an implementation of the present invention, the method for determining whether to generate an adjustment instruction in step 2 is:

[0051] Get the received optical power P of the optical fiber during main line transmission L , bit error rate BER, the time it takes for data to travel from the sender to the receiver T L , packet loss rate LR and transmission rate V;

[0052] Substitute the obtained parameters into the formula Obtaining a data transmission quality evaluation value Da;

[0053] The obtained data transmission quality evaluation value Da is compared with the data transmission quality evaluation threshold Da preset by the system th To compare:

[0054] When Da>Da thWhen it is judged that the data transmission is abnormal, a switching instruction is generated;

[0055] in, The standard time used by the system to set the data transmission end to the receiving end. The average received optical power set for the system.

[0056] Through the above technical solution, this implementation provides a method for generating a switching instruction, specifically, first obtaining the received optical power P of the optical fiber during the main line transmission. L , bit error rate BER, the time it takes for data to travel from the sender to the receiver T L , packet loss rate LR and transmission rate V, through the formula Get the data transmission quality evaluation value Da, formula Indicates the received optical power P L The difference between the received optical power and the average received optical power. The optical power reflects the strength of the signal. Too low optical power may make it difficult to receive the signal, while too high optical power may exceed the receiving range of the device, causing saturation or even damage to the optical receiver. Therefore, the smaller the value, the better the system data transmission quality. The formula It indicates the ratio of the time taken for data to be transmitted from the sender to the receiver to the standard time. The larger the value, the higher the data transmission delay and the worse the data transmission quality. Therefore, from the formula It can be seen that when the delay The lower the received optical power P L The difference between the received optical power and the average The smaller the bit error rate BER and the packet loss rate LR, or the higher the data transmission rate V, the smaller the data transmission quality evaluation value Da, indicating that the system data transmission quality is better. Therefore, the obtained data transmission quality evaluation value Da is compared with the system preset data transmission quality evaluation threshold Da. th Compare: When Da>Da th When the data transmission of the main line is abnormal, a switching instruction is generated to switch the main route to the backup route to ensure normal data transmission. In this way, the transmission quality of the main line can be monitored in real time to ensure the quality of data transmission.

[0057] In the above technical solution, the standard time used by the data sending end to the receiving end set by the system is Average received optical power set by the system The data transmission quality judgment threshold Da preset by the system can be determined based on historical data th It can be obtained based on empirical data and will not be described in detail here.

[0058] As an implementation manner of the present invention, the method for determining whether to generate a switching instruction in step 2 further includes:

[0059] When it is determined that no abnormality occurs in data transmission, the data transmission quality evaluation value obtained within a preset period ΔT is obtained, so as to formulate a data transmission quality evaluation value versus time curve Da(t);

[0060] So through the formula Obtain the risk warning coefficient Φ of data transmission;

[0061] When Φ>1, a switching instruction is generated;

[0062] Among them, t x is the start time of the preset cycle, t y is the end time of the preset cycle, Da th (t) is the time-varying curve of the standard data transmission quality evaluation value preset by the system, A is the jitter coefficient, GEN th The risk warning thresholds preset for the system;

[0063] The method for obtaining the jitter coefficient A is to obtain the time taken by the data to travel from the sender to the receiver each time within the preset period ΔT.

[0064] So through the formula Get the jitter coefficient;

[0065] in, n is the total number of data transmission and reception within a preset period, and i∈[1,n].

[0066] Through the above technical solution, this embodiment provides another way to generate a switching instruction, specifically, when it is determined that there is no abnormality in data transmission, the data transmission quality evaluation value obtained within a preset period ΔT is obtained, and the size of the preset period can be artificially formulated, so as to formulate a data transmission quality evaluation value over time curve Da(t), and then through the formula Get the risk warning coefficient Φ of data transmission, formula It can represent the jitter of data transmission within a preset period. The larger the value, the greater the jitter, which means the more unstable the data transmission quality. The formula It can represent the difference between the cumulative data transmission quality evaluation value obtained within the preset period and the cumulative standard data transmission quality evaluation value. The larger the value, the greater the potential risk of data transmission within the preset period. Therefore, the formula is finally used The result is compared with the risk warning threshold preset by the system. When Φ>1, it means that there is a greater potential abnormal risk in the main line at this time, and a switching instruction is generated to switch the main route to the backup route. In this way, the potential abnormal conditions of the main line during data transmission can be monitored to ensure the normal quality of data transmission.

[0067] In the above technical solution, the system preset standard data transmission quality evaluation value changes with time curve Da th (t), system preset risk warning threshold GEN th All of these can be determined based on historical experience data, so I will not elaborate on them here.

[0068] As an implementation mode of the present invention, the method for determining the switching priority of the backup line in step 3 is:

[0069] Obtain the fiber loss value changes and temperature changes of the backup line during historical operation, so as to formulate the fiber loss value vs. transmission distance curve AC(s) and the temperature vs. time curve T self (t);

[0070] By formula Get the status value K of each backup line;

[0071] Select the backup line with the smallest status value K for priority switching;

[0072] Among them, τ1 and τ2 are proportional coefficients, s1 is the initial distance of transmission, s2 is the end distance of transmission, ΔAC is the preset optical fiber loss reference value, It is the time-varying curve of the standard temperature preset by the system, t1 is the start time of the historical detection, t2 is the end time of the historical detection, and α is the environmental impact coefficient;

[0073] The method for obtaining the environmental impact coefficient α is as follows: Get the average humidity H of the day N , average temperature T N And the average precipitation W N , and obtain the average humidity H in the previous week O , average temperature T O And the average precipitation W O ;

[0074] Then the environmental impact coefficient α is calculated by the following formula;

[0075]

[0076] in, The optimal daily humidity preset for the system. The optimal daily temperature preset by the system. The optimal daily precipitation preset by the system. The optimal weekly humidity preset for the system. The optimal weekly temperature preset for the system. The optimal weekly precipitation preset by the system.

[0077] Through the above technical solution, this embodiment provides a method for selecting a backup route for switching. Since the backup line is affected by its own quality and environmental factors, its transmission quality is also different. Therefore, the fiber loss value changes and their own temperature changes of the two backup lines during historical operation are first obtained, so as to formulate the fiber loss value versus transmission distance change curve AC(s) and the temperature versus time change curve T self (t), and then obtain the average humidity H of the area where the two backup lines are located on that day N , average temperature T N And the average precipitation W N , and obtain the average humidity H in the previous week O , average temperature T O And the average precipitation W O , and then through the formula The status value K of each backup line is obtained, and the formula is It indicates the ratio between the energy loss of the optical signal when it is transmitted in the optical fiber and the standard loss reference value. The larger the value, the worse the condition of the backup line. The formula is It indicates the difference between the temperature change of the standby line and the standard temperature change during data transmission. The larger the value, the worse the condition of the standby line. Similarly, the optical fiber needs a suitable working environment when working. If the environment is poor, it will also affect the data transmission quality. Therefore, the average humidity H of the day is obtained. N , average temperature T N And the average precipitation W N , and obtain the average humidity H in the previous week O , average temperature T O And the average precipitation W O , and by the formula By finding the environmental impact coefficient α, we can know that the greater the difference between the obtained humidity, temperature, and precipitation and the optimal humidity, temperature, and precipitation, the greater the environmental impact coefficient α, indicating that the environmental impact is more serious. Finally, through the formula A comprehensive analysis is performed to obtain the status values ​​K of the two backup lines. When the status value is smaller, it means that the status of the backup line is better, and the backup line with the smaller status value K is selected for priority switching; in addition, if the status values ​​of the two backup lines are not much different, they can be selected at will, or evenly distributed to ensure the load balance of the line. In this way, a comprehensive analysis can be performed based on the changes in the optical fiber loss value and the temperature change of the backup line during historical operation, combined with the environmental information of the backup line, to obtain the status values ​​of the two backup lines. In this way, the transmission quality of the two backup lines can be clearly known, so that the one with better quality can be selected for priority distribution, thereby ensuring the normal transmission of data.

[0078] In the above technical solution, the proportional coefficients τ1 and τ2, the preset optical fiber loss reference value ΔAC, and the system preset standard temperature change curve over time It can be determined based on historical experience data. The historical detection start time t1 and end time t2 can be determined manually. The system presets the daily optimal humidity System preset daily optimal temperature The system preset optimal daily precipitation Weekly optimal humidity preset for the system System preset optimal temperature for the week System preset optimal weekly precipitation All of them can be determined based on simulation experimental data and empirical data, so I will not elaborate on them here.

[0079] The above contents are merely examples and explanations of the concept of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A three-route optical line protection method based on OLP, characterized in that: The protection method comprises: Step 1: Set up three optical fiber lines that are geographically independent of each other, each line is equipped with an optical fiber route, one of the optical fiber lines is the main line, and the other two are backup lines; Step 2: The OLP device is responsible for monitoring the operating parameter information of the main line and the backup line in operation, and analyzes the transmission quality of the main line according to the operating parameter information to determine whether a switching instruction needs to be generated; Step 3: Determine the switching priority of the backup line according to the acquired operating parameter information and the environmental information of the optical fiber, wherein the operating parameter information includes: received optical power, bit error rate, packet loss rate, transmission rate, the time taken for data to travel from the transmitting end to the receiving end, the temperature of the optical fiber itself, and the optical fiber loss value. The environmental information is obtained through the local meteorological bureau, and includes temperature information, humidity information, and rainfall information. Step 4: Select the best backup line for optical fiber transmission according to the switching instruction; The method for determining the switching priority of the backup line in step 3 is: obtaining the fiber loss value change and the temperature change of the backup line during historical operation, thereby formulating the fiber loss value versus transmission distance change curve AC(s) and the temperature change curve T self (t); By formula Get the status value K of each backup line; Select the backup line with the smallest status value K for priority switching; Among them, τ1 and τ2 are proportional coefficients, s1 is the initial distance of transmission, s2 is the end distance of transmission, ΔAC is the preset optical fiber loss reference value, is the standard temperature change curve preset by the system over time, t1 is the start time of historical detection, t2 is the end time of historical detection, α is the environmental impact coefficient, and the method for obtaining the environmental impact coefficient is: obtain the average humidity H of the day N , average temperature T N And the average precipitation W N , and obtain the average humidity H in the previous week O , average temperature T O And the average precipitation W O ; Then the environmental impact coefficient α is calculated by the following formula; in, The optimal daily humidity preset for the system. The optimal daily temperature preset by the system. The optimal daily precipitation preset by the system. The optimal weekly humidity preset for the system. The optimal weekly temperature preset for the system. The optimal weekly precipitation preset by the system.

2. The three-route optical line protection method based on OLP according to claim 1, characterized in that: The method for determining whether to generate a switching instruction in step 2 is: Get the received optical power P of the optical fiber during main line transmission L , bit error rate BER, the time it takes for data to travel from the sender to the receiver T L , packet loss rate LR and transmission rate V; Substitute the obtained parameters into the formula Obtaining a data transmission quality evaluation value Da; The obtained data transmission quality evaluation value Da is compared with the data transmission quality evaluation threshold Da preset by the system th To compare: When Da>Da th When it is judged that the data transmission is abnormal, a switching instruction is generated; in, The standard time used by the system to set the data transmission end to the receiving end. The average received optical power set for the system.

3. The three-route optical line protection method based on OLP according to claim 2, characterized in that: The method for determining whether to generate a switching instruction in step 2 further includes: When it is determined that no abnormality occurs in data transmission, the data transmission quality evaluation value obtained within a preset period ΔT is obtained, so as to formulate a data transmission quality evaluation value versus time curve Da(t); So through the formula Obtain the risk warning coefficient Φ of data transmission; When Φ>1, a switching instruction is generated; Among them, t x is the start time of the preset cycle, t y is the end time of the preset cycle, Da th (t) is the time-varying curve of the standard data transmission quality evaluation value preset by the system, A is the jitter coefficient, GEN th The risk warning threshold preset for the system.

4. The three-route optical line protection method based on OLP according to claim 3 is characterized in that: The method for obtaining the jitter coefficient is: Get the time it takes for data to travel from the sender to the receiver each time within the preset period ΔT So through the formula Get the jitter coefficient; in, n is the total number of data transmission and reception within a preset period, and i∈[1,n].

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