CN113485257A - Industrial protocol analysis built-in program optimization method - Google Patents
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Abstract
The invention discloses an industrial protocol analysis built-in program optimization method, which comprises the following steps: s1, establishing a side cloud coordination framework; s2, carrying out built-in scheme coding on the industrial protocol; s3, optimizing according to the historical data; s4, pre-deploying an optimal program group on the edge device; and S5, updating the built-in program as required. The method is based on the edge cloud cooperative architecture. According to the invention, historical use data of the program is analyzed according to the industrial protocol, an optimal program built-in scheme is obtained by using an optimization algorithm, and a program group corresponding to the optimal scheme is built into factory edge equipment. And after the edge equipment runs, dynamically updating the built-in protocol analysis program according to actual requirements.
Description
Technical Field
The invention belongs to the technical field of industrial Internet of things, and relates to an optimization method for an industrial protocol analysis built-in program.
Background
With the rapid development of the industrial internet of things technology, a large number of heterogeneous industrial protocol analysis programs are generated, which brings great challenges to the deployment of edge devices. The edge device is customized to embed a plurality of different industrial protocol analysis programs according to different industrial scenes. In the conventional method, all protocol analysis programs are often built in the edge device and are selectively used according to requirements in an actual industrial scene. Currently, there is also a method using a cloud edge coordination mode to implement a protocol parser for dynamically configuring an edge device. And the edge equipment sends a downloading request to the cloud end through the network according to the actual requirement of the industrial environment, and downloads the corresponding industrial protocol analysis program. However, these approaches face the challenges of complex and varied industrial environments:
1) in the traditional method, a large amount of useless analysis programs are arranged in the edge device, so that a large amount of storage space of the edge device is wasted, and the capability of storing business related data is reduced.
2) Although the dynamic deployment of the protocol analysis program can be realized by a method based on cloud edge cooperation, the method can cause a large amount of consumption of network bandwidth and cause network congestion due to the use of network transmission in the case of facing massive edge devices.
Disclosure of Invention
In order to solve the problems, the invention provides an industrial protocol analysis built-in program optimization method, which comprises the following steps:
s1, establishing a side cloud coordination framework;
s2, carrying out built-in scheme coding on the industrial protocol;
s3, optimizing according to the historical data;
s4, pre-deploying an optimal program group on the edge device;
and S5, updating the built-in program as required.
Preferably, the establishing of the edge cloud collaborative architecture comprises the step that an industrial protocol analysis program library of a cloud side manages an industrial protocol analysis program; the sending and receiving request program of the edge terminal updates the built-in protocol analysis program; and running a protocol analysis program at the edge terminal.
Preferably, the encoding of the built-in schemes for the industrial protocols includes regarding all protocol analysis programs on each edge device as a set of built-in schemes, and encoding each set of built-in schemes according to a preset encoding mode.
Preferably, the optimizing according to the historical data comprises the following steps:
s31, randomly generating an initialization scheme;
s32, calculating the fitness of each scheme according to a predefined fitness function, and saving the optimal scheme as a global optimal scheme;
s33, calculating the updating step length of each scheme by a step length updating method, and updating each scheme;
s34, selecting a scheme randomly according to a preset elimination probability for elimination;
s35, calculating the fitness of the updated and eliminated scheme, comparing the calculated fitness with the fitness of the global optimal scheme, and if the calculated fitness is better, replacing the global optimal scheme;
s36, judging whether the optimal scheme meets the expected target or reaches the maximum iteration number, if not, returning to S33;
and S37, if yes, obtaining the optimal scheme.
Preferably, the step-size updating method comprises a priority-based binary cuckoo algorithm.
Preferably, the optimal program group is pre-deployed, the built-in protocol analysis program is updated as required, the optimal built-in protocol analysis program group is obtained by optimizing according to historical data, and the optimal protocol analysis program group is pre-deployed in the edge device. After the edge device runs, the built-in program of the edge device is updated according to the requirement.
The beneficial effects of the invention at least comprise: the method is based on a side cloud cooperative architecture, an optimal protocol analysis program built-in scheme is obtained through collected historical use data of the industrial protocol analysis program by using an optimization algorithm, and a program group corresponding to the scheme is placed in factory edge equipment. During actual operation, the edge device dynamically updates the built-in program through the cloud protocol analysis program library according to requirements. The method avoids the waste of storage space caused by the built-in of all protocol analysis programs, and also reduces the network bandwidth pressure caused by requesting to download the programs from the cloud under the high concurrency state of massive edge devices.
Drawings
FIG. 1 is a flowchart illustrating steps of a method for optimizing an industrial protocol analysis embedded program according to an embodiment of the present invention;
fig. 2 is a side cloud coordination architecture diagram of an industrial protocol parsing built-in program optimization method according to an embodiment of the present invention;
FIG. 3 is a flowchart of the step S3 of the method for optimizing the industrial protocol parsing embedded program according to the embodiment of the present invention;
fig. 4 is a data protocol parsing process diagram of the industrial protocol parsing built-in program optimization method according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
On the contrary, the invention is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details.
Referring to fig. 1, a flowchart of an optimization method for analyzing a built-in program for an industrial protocol according to a technical solution of the present invention is shown, and includes the following steps:
s1, establishing a side cloud coordination framework;
s2, carrying out built-in scheme coding on the industrial protocol;
s3, optimizing according to the historical data;
s4, pre-deploying an optimal program group on the edge device;
and S5, updating the built-in program as required.
S1, establishing a side cloud cooperative architecture, wherein an industrial protocol analysis program library comprising a cloud end manages an industrial protocol analysis program; the sending and receiving request program of the edge terminal updates the built-in protocol analysis program; and running a protocol analysis program at the edge terminal.
S2, carrying out built-in scheme coding on the industrial protocol, wherein all protocol analysis programs on each edge device are regarded as a set of built-in scheme, and each set of built-in scheme is coded according to a preset coding mode.
S3, optimizing according to the historical data, comprising the following steps:
s31, randomly generating an initialization scheme;
s32, calculating the fitness of each scheme according to a predefined fitness function, and saving the optimal scheme as a global optimal scheme;
s33, calculating the updating step length of each scheme by a step length updating method, and updating each scheme;
s34, selecting a scheme randomly according to a preset elimination probability for elimination;
s35, calculating the fitness of the updated and eliminated scheme, comparing the calculated fitness with the fitness of the global optimal scheme, and if the calculated fitness is better, replacing the global optimal scheme;
s36, judging whether the optimal scheme meets the expected target or reaches the maximum iteration number, if not, returning to S33;
and S37, if yes, obtaining the optimal scheme.
The step size updating method comprises a binary cuckoo algorithm based on priority.
The method comprises the steps of pre-deploying an optimal program group, updating a built-in protocol analysis program as required, obtaining the optimal built-in protocol analysis program group according to historical data through optimization, and pre-deploying the optimal built-in program group on edge equipment. After the edge device runs, the built-in program of the edge device is updated according to the requirement.
The invention is based on a cloud edge collaboration architecture, and referring to fig. 2, the invention has a cloud management platform and a plurality of edge devices. The cloud platform assists the edge device to dynamically update the built-in protocol analysis program, and the edge device realizes the deployment and operation of different protocol analysis programs according to different industrial environments. The cloud platform can be deployed in public clouds such as the Ali cloud and the like, and can also be deployed in private clouds. An industrial protocol analysis program library is deployed on the cloud platform and is responsible for daily maintenance of various protocol analysis programs, responding to an update request from the edge equipment and providing downloading service of the protocol analysis programs for the edge equipment. The edge device can be any embedded device supporting the operation of the industrial protocol parser, and the optional scheme is raspberry pi 4B. The edge and the cloud interact in a Modbus UDP and FTP mode. The request information of the protocol analysis program is interacted through a Modbus UDP protocol, and the industrial protocol analysis program is transmitted through the FTP.
The built-in scheme optimization flow of the invention is shown in figure 3. And S31, randomly generating a group of initialization schemes, wherein the coding of the schemes adopts a preset coding mode, and a 01 coding mode is adopted in the embodiment of the invention. All protocol resolvers are encoded as a set of 01 arrays, with 0 indicating that the protocol resolver represented by the bit is not adopted by the schema and 1 indicating that the protocol resolver represented by the bit is adopted by the schema. And S32, calculating the fitness of each scheme according to a predefined fitness function, and saving the scheme with the optimal fitness as a global optimal scheme. And S33, adopting a problem-adaptive step length updating method to calculate the updating step length of each scheme and update each scheme. An alternative in an embodiment of the invention is to use a priority-based binary cuckoo algorithm as the update method for the step size.
In order to adapt to discrete coding, the binary cuckoo algorithm based on priority adopts two methods to carry out binary updating on the step length of the cuckoo algorithm. The mathematical expression of the method is shown as formulas 1, 2 and 3. Wherein i represents a dimension number, Step is a Step length calculated based on the flight of the Levy, and PSiThe rand is a random number, W, subject to uniform distribution for the probability value obtained after conversion of the flight step length of the LevisiFor the binary value, W, of the protocol analysis program corresponding to the ith dimension in the iterationi' is the binary value of the protocol parser corresponding to the ith dimension in the previous iteration. The first method is formula 1, and probability value PS corresponding to each dimension step length is calculated through sigmoid functioni. PS for random number rand generated by each protocol and corresponding dimensioniThe comparison updates the protocol parser array W. The second method is equation 2 and equation 3. When Stepi<When the value is equal to 0, the protocol analysis program array W is updated by the formula 2, and when Stepi>When the value is equal to 0, the protocol analysis program array W is updated by using equation 3. The second method is to calculate the probability value corresponding to each dimension step size through the deformation of the sigmoid function. If only formula 1 is used for updating, the global diversity is strong, and almost no convergence exists. And only using formula 2, 3 to update, its convergence is very strong, but the global diversity is weak. Therefore, the present invention solves the problem by setting the control coefficient pr in two ways at the same time. pr is between 0 and 1. A random number is generated for each step calculated from the levey flight. If the random number is less than pr, the code of the corresponding dimension is updated using equation 1. If the random number is greater than pr, updating the code of the corresponding dimension using formula 2 and formula 3.
And S34, randomly selecting a scheme for elimination according to the preset elimination probability, and updating the eliminated scheme by adopting a proper method. In the priority-based binary cuckoo algorithm, two protocol analysis program arrays are selected from a group to perform multipoint intersection in a roulette mode. And selecting the offspring with better fitness to update the abandoned scheme. And judging whether the updated scheme meets the constraint condition, if not, setting the dimensionality with the array value of 1 as 0 in a roulette mode according to the preset priority of each protocol analysis program until the constraint condition is met.
And S35, calculating the fitness of the updated and eliminated scheme, comparing the fitness with the global optimal scheme, and replacing the global optimal scheme if the fitness is better. And S36, returning to S33 to continue the iteration until the global optimal scheme meets the expected target or the maximum iteration number is reached. And S37, obtaining the global optimal scheme which is the optimal scheme.
The execution process of the dynamic data protocol analysis method of the invention is shown in figure 4 and mainly comprises two parts: the initial protocol analysis program is internally provided with and dynamically updates the protocol analysis program. In the initial protocol analysis program built-in stage, firstly, finding an optimal program scheme through an optimization algorithm according to historical use data of the protocol analysis program; and secondly, embedding a corresponding protocol analysis program into the edge device according to the optimal scheme. In the stage of dynamically updating the protocol analysis program, the edge device deletes the unused program in the built-in program according to the actual industrial scene, then sends a request for downloading a new program to the cloud protocol analysis program library, and after receiving the request, the cloud allows the edge device to download the corresponding protocol analysis program from the protocol analysis program library.
In particular, a typical configuration table of historical usage data of the protocol parser of the present invention is shown in table 1 below. The configuration table contains the edge device ID, as well as the ID, type, size, and most recent usage time of the protocol parser for each protocol parser used by the edge device. The device ID and the program ID are unique, and the unit of the program size is KB.
Table 1 protocol parser configuration table
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. An industrial protocol analysis built-in program optimization method is characterized by comprising the following steps:
s1, establishing a side cloud coordination framework;
s2, carrying out built-in scheme coding on the industrial protocol;
s3, optimizing according to the historical data;
s4, pre-deploying an optimal program group on the edge device;
and S5, updating the built-in program as required.
2. The method according to claim 1, wherein the building of the edge cloud collaborative architecture includes managing an industrial protocol analysis program by an industrial protocol analysis program library in a cloud; the sending and receiving request program of the edge terminal updates the built-in protocol analysis program; and running a protocol analysis program at the edge terminal.
3. The method according to claim 1, wherein the encoding of the internal schemes of the industrial protocol includes treating all protocol analysis programs on each edge device as a set of internal schemes, and encoding each set of internal schemes according to a preset encoding method.
4. The industrial protocol parsing built-in program optimization method according to claim 1, wherein the optimizing based on historical data comprises the steps of:
s31, randomly generating an initialization scheme;
s32, calculating the fitness of each scheme according to a predefined fitness function, and saving the optimal scheme as a global optimal scheme;
s33, calculating the updating step length of each scheme by a step length updating method, and updating each scheme;
s34, selecting a scheme randomly according to a preset elimination probability for elimination;
s35, calculating the fitness of the updated and eliminated scheme, comparing the calculated fitness with the fitness of the global optimal scheme, and if the calculated fitness is better, replacing the global optimal scheme;
s36, judging whether the optimal scheme meets the expected target or reaches the maximum iteration number, if not, returning to S33;
and S37, if yes, obtaining the optimal scheme.
5. The industrial protocol parsing built-in program optimization method according to claim 4, wherein the step size update method comprises a priority-based binary cuckoo algorithm.
6. The method for optimizing the industrial protocol analysis built-in program according to claim 1, wherein the pre-deploying of the optimal program group and the updating of the built-in protocol analysis program as needed are performed, the optimal built-in protocol analysis program group is obtained by optimizing according to historical data, and the optimal protocol analysis program group is pre-deployed in the edge device. After the edge device runs, the built-in program of the edge device is updated according to the requirement.
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