A dual-redundancy communication architecture design method for port intelligent equipment

Abstract

The application provides a dual-path redundant communication architecture design method of port intelligent equipment, and belongs to the field of industrial Internet of Things communication system design. The dual-path redundant communication architecture design method comprises a design stage, a monitoring stage, an optimization stage and a recovery stage. Firstly, a dual-path communication architecture is constructed in the design stage; secondly, a path state monitoring and scoring mechanism is established in the monitoring stage; thirdly, dynamic task scheduling is performed in the optimization stage; and finally, path switching and automatic back switching are realized in the recovery stage. The application is divided into four stages of design, monitoring, optimization and recovery according to the order of communication architecture design, can solve the problems of low link reliability, untimely fault switching and insufficient communication resource utilization efficiency in the existing communication architecture, and improve the communication stability and system robustness of port intelligent equipment in a complex environment.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of industrial Internet of Things communication system design, and relates to a communication architecture design method, in particular to a dual-path redundant communication architecture design method for port intelligent equipment. BACKGROUND

[0002] With the deepening of the construction of port intelligence, intelligent loading and unloading, yard management, automatic driving transportation, and unmanned inspection are increasingly popular. These key operation links require high bandwidth, low latency, high stability, and strong anti-interference of the communication system. In practical applications, traditional communication architectures often rely on a single link for data transmission, such as fixed networks or single-channel wireless communication. Such structures often have insufficient reliability when faced with complex port environments. For example, in areas with dense large metal structures, areas with frequent equipment movement, or areas with severe signal obstruction, communication signals are prone to attenuation, packet loss, or temporary interruption, directly affecting the remote control, state feedback, and collaborative operation efficiency of the operation equipment.

[0003] To solve the above problems, Chinese invention patent CN113316169B proposes a UAV-assisted communication optimization method and device for smart ports. This method uses a UAV to carry an intelligent reflecting surface to construct an auxiliary communication system, and dynamically controls the signal propagation environment to enhance the coverage and communication quality of the single path, i.e., the UAV link. However, this patent mainly focuses on the performance optimization of the single path itself and does not consider how to quickly and automatically switch to the backup path when the main path fails or deteriorates in quality. Chinese invention patent CN116963013A proposes a data transmission method for port railway transport trains and a locomotive communication terminal. This method sets up dual communication transmission links of 5G communication links and radio communication links between the locomotive and the ground system, selects the transmission path according to the importance and size of the locomotive data, and switches when the selected link does not respond. However, the link switching mechanism of this patent is relatively simple and passive, only triggered when the link is completely unresponsive, lacking real-time monitoring of link quality and active switching capability based on quality degradation.

[0004] Therefore, there is an urgent need for a systematic communication architecture design method that can quickly and automatically switch when the main communication path is abnormal, and has the ability of link state detection, load balancing scheduling, path performance optimization, etc., to ensure the continuous availability, flexibility, and robustness of the communication system, thereby improving the operation efficiency and safety level of port intelligent equipment in a complex and variable operation environment. SUMMARY

[0005] In view of the problems in the prior art, the application provides a dual-path redundant communication architecture design method for port intelligent equipment, which is divided into four stages of design, monitoring, optimization and recovery according to the order of communication architecture design, and can solve the problems of low link reliability, untimely fault switching and insufficient communication resource utilization efficiency in the existing communication architecture, and improve the communication stability and system robustness of the port intelligent equipment in a complex environment.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the application is:

[0007] A dual-path redundant communication architecture design method for port intelligent equipment, the dual-path redundant communication architecture design method comprises a design stage, a monitoring stage, an optimization stage and a recovery stage, and specifically comprises the following steps:

[0008] Step 1: constructing a dual-path communication architecture in the design stage. Specifically:

[0009] Step 1.1: deploying a dual-mode communication terminal on each port intelligent equipment, the dual-mode communication terminal integrating two completely independent communication modules, radio frequency channels and network interfaces.

[0010] Step 1.2: constructing two dual-path communication paths which are independent in the physical layer and the logical layer according to the existing technology and actual requirements, the dual paths being a main path and a standby path .

[0011] Step 2: establishing a path state monitoring and scoring mechanism in the monitoring stage. Specifically:

[0012] The dual paths constructed in step 1 are continuously monitored, and a path scoring mechanism is established in step 2.3 to score the main path and the standby path. Step 2.1 is data acquisition and sliding window processing; step 2.2 is data standardization; step 2.3 is path scoring and outputting path scores. Specifically:

[0013] Step 2.1: acquiring five parameter data of the main path and the standby path at a fixed sampling period : received signal strength , signal-to-noise ratio , round-trip delay , bit error rate and channel occupancy rate , and performing sliding window processing on the five parameter data.

[0014] The sliding window processing refers to that the window slides forward at a sampling period , each time the window covers new period data and removes the earliest period data. The window size is sampling periods, and each parameter data corresponds to a window Values.

[0015] Step 2.2: Standardize the five parameter data collected in Step 2.1 to obtain standard values. The standardization process is as follows:

[0016] For received signal strength Signal-to-noise ratio The larger the value, the better the parameter data. The process is performed using formula (1):

[0017] (1)

[0018] in, This represents the standardized value of the parameter data; Indicates parameter data; Indicates the window correspond The maximum value among all possible values; Indicates the window correspond The minimum value of all values;

[0019] For round-trip delay Bit error rate Channel occupancy rate The smaller the value, the better the parameter data. Formula (2) is used for processing:

[0020] (2)

[0021] in, This represents the standardized value of the parameter data; Indicates parameter data; Indicates the window correspond The maximum value among all possible values; Indicates the window correspond The minimum value among all possible values.

[0022] The received signal strength is obtained after standardization. Signal-to-noise ratio Round-trip delay Bit error rate Channel occupancy rate The standard values ​​are the standard received signal strength. Standard signal-to-noise ratio Standard round-trip time Standard bit error rate Standard channel occupancy rate .

[0023] Step 2.3: The standard values obtained after standardization in step 2.2 are scored according to the path scoring mechanism to calculate the main path and backup path scores. The model of the path scoring mechanism is as follows:

[0024] (3)

[0025] wherein, is the standard received signal strength , the standard signal-to-noise ratio , the standard round-trip delay , the standard bit error rate , and the standard channel occupancy rate .

[0026] In this step 2: step 2.1 collects five parameter data of the main path and backup path at a fixed sampling period , step 2.2 standardizes the five parameter data collected in step 2.1 to obtain standard values, and step 2.3 scores the main path and backup path according to the path scoring mechanism based on the standard values obtained after standardization in step 2.2 to generate the main path score and the backup path score , which are used as the basis for subsequent task scheduling and path switching.

[0027] Step 3: Dynamic task scheduling is performed in the optimization phase. Specifically:

[0028] Based on the main path score and the backup path score output by step 2, data task hierarchical scheduling is performed.

[0029] The data tasks are divided into three levels, specifically: the first level is control instructions, which are transmitted only using the main path; the second level is device status data, which is distributed to dual-path transmission according to the dynamic shunt weight; and the third level is log data, which is transmitted only using the backup path.

[0030] Among the second level data tasks, the dynamic shunt weight is calculated as follows:

[0031] (4)

[0032] (5)

[0033] wherein, represents the main path shunt weight; represents the backup path shunt weight; represents the main path score; represents the backup path score. The second level data tasks are distributed according to , The proportion of the main path and the proportion of the backup path are respectively allocated to the main path , the backup path .

[0034] Step 4: Implement path switching and automatic back switching in the recovery phase. Specifically:

[0035] After the dynamic task scheduling in step 3, the port intelligent equipment transmits data through the dual-redundancy communication architecture. When the communication quality of the main path deteriorates, based on the main path score and the backup path score output in step 2, path switching and automatic back switching are performed.

[0036] The application adopts a hysteresis comparison strategy to avoid frequent switching of the main path and the backup path. The hysteresis comparison strategy is jointly composed of a double-threshold judgment mechanism and a score trend judgment logic. Specifically, the following sub-steps are included:

[0037] Step 4.1: Set the upper limit threshold of the main path score to , ranging from 0.8 to 0.9; and the lower limit threshold of the main path score to , ranging from 0.4 to 0.6; wherein and are preset constants, and . At the same time, define the number of consecutive periods and the main path score difference threshold , wherein and are preset parameters, ranging from 2 to 5, ranging from 0.01 to 0.1.

[0038] Step 4.2: The main path outputs the main path score in each sampling period . The main path switching condition is that is strictly decreasing in consecutive periods, and the path score in the current period is lower than the lower limit threshold of the main path score . It is expressed as:

[0039] (6)

[0040] wherein, represents the current period, represents the previous period, and so on; represents the main path score in the current period, represents the main path score in the previous period, and so on.

[0041] If the condition shown in formula (6) is met, it is determined that the main path communication quality continues to deteriorate, and path switching is triggered immediately, and the main path data task is migrated to the backup path for transmission.

[0042] Step 4.3: After switching to the backup path, the main path is still in each sampling period Output the main path score The condition for automatic return to the main path is In the upper threshold of the main path score for two consecutive periods, and the score difference between any two adjacent periods is less than the main path score difference threshold . It is expressed as:

[0043] (7)

[0044] Wherein, the judgment of the score difference between adjacent two periods covers all continuous period pairs.

[0045] If the condition shown in formula (7) is met, it is determined that the main path communication quality is stable and recovered, and the return instruction is issued to restore the normal communication path configuration.

[0046] The beneficial effects of the present application are:

[0047] The present application lays a reliable foundation by constructing a dual-path communication architecture (step 1), quantifies the path quality in real time by using a path state monitoring and scoring mechanism (step 2), optimizes resource allocation relying on dynamic hierarchical scheduling (step 3), and finally realizes path switching and automatic return by the double threshold judgment mechanism and score trend of the hysteresis comparison strategy (step 4). This closed-loop mechanism not only guarantees the continuity of communication, but also solves the problems of existing communication architecture such as delayed fault switching and insufficient communication resource utilization efficiency, thereby improving the communication stability and system robustness of port intelligent equipment in complex environments. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 The schematic diagram of the dual-path redundant communication architecture design method of the port intelligent equipment proposed by the present application.

[0049] Figure 2 The flowchart of the path state monitoring and scoring mechanism introduced in the monitoring stage. DETAILED DESCRIPTION

[0050] The present application will be further described below in combination with specific embodiments.

[0051] To realize the dual-path redundant communication architecture of the port intelligent equipment proposed by the present application, it has high link reliability, timely fault switching and high communication resource utilization efficiency. This embodiment takes typical port intelligent equipment as the object, adopts a four-stage implementation process (such asFigure 1 The main and standby dual-path communication structure is constructed, a path state monitoring and scoring mechanism, a dynamic task scheduling strategy, a path switching and automatic return switching mechanism are matched, and a complete and implementable technical system is formed. The following steps are included:

[0052] Step 1: Construct a dual-path communication architecture in the design phase. Specifically:

[0053] Step 1.1: Deploy a dual-mode communication terminal on each port intelligent equipment, including intelligent loading and unloading equipment (such as shore cranes, yard cranes) and intelligent horizontal transportation equipment (such as automated guided vehicles, unmanned trucks, and straddle carriers). The dual-mode communication terminal integrates two completely independent communication modules, radio frequency channels, and network interfaces.

[0054] Step 1.2: According to existing technologies and actual needs, two communication paths that are independent in physical and logical layers are constructed. Path one is constructed through a split waveguide, relying on metal waveguide facilities and equipment end directional panel antennas to establish point-to-point communication. Path two is established through an iMT-8000 wireless communication system to establish a wide-area non-directional communication channel. The device end antenna is installed on the top to access the wireless base station. Path one and path two are the main path and the standby path .

[0055] Step 2: Establish a path state monitoring and scoring mechanism in the monitoring phase. Specifically:

[0056] The dual-path constructed in step 1 is continuously monitored, and a path scoring mechanism is established to score the main path and the standby path. Step 2.1 is data acquisition and sliding window processing; step 2.2 is data standardization; step 2.3 is path scoring, and the path score is output (as shown in Figure 2 ).

[0057] Step 2.1: Five parameter data of the dual-path are collected at a fixed sampling period : received signal strength , signal-to-noise ratio , round-trip delay , bit error rate , and channel occupancy rate , and the five parameter data are processed by sliding window.

[0058] The sliding window processing refers to the window sliding forward at a sampling period . Each sliding covers new period data and removes the earliest period data. The window size is 10 sampling periods, and each parameter data corresponds to 10 values in the sliding window.

[0059] Step 2.2: Standardize the five parameter data collected in Step 2.1 to obtain standard values. The standardization process is as follows:

[0060] For received signal strength Signal-to-noise ratio The larger the value, the better the parameter data. Formula (1) is used for processing; for round-trip delay Bit error rate Channel occupancy rate The smaller the value, the better the parameter data. Formula (2) is used for processing;

[0061] The received signal strength is obtained after standardization. Signal-to-noise ratio Round-trip delay Bit error rate Channel occupancy rate The standard values ​​are the standard received signal strength. Standard signal-to-noise ratio Standard round-trip time Standard bit error rate Standard channel occupancy rate .

[0062] Step 2.3: Calculate the scores for the primary and backup paths based on the standard values ​​obtained after standardization in Step 2.2, according to the path scoring mechanism. The model of the path scoring mechanism is shown in formula (3).

[0063] Step 3: Perform dynamic task scheduling during the optimization phase. Specifically:

[0064] Based on the main path score output in step 2 Alternative route scoring Perform hierarchical scheduling of data tasks.

[0065] Data tasks are divided into three levels: Level 1 is control commands, transmitted only via the main path; Level 2 is intelligent equipment status data, distributed to dual paths according to dynamic routing weights; Level 3 is log data, transmitted only via the backup path. The dynamic routing weights for Level 2 data tasks are calculated using formulas (4) and (5). The Level 2 data tasks are distributed according to... , The proportions are allocated to the main path respectively. Alternate path .

[0066] Step 4: Implement path switching and automatic revert during the recovery phase.

[0067] After the dynamic task scheduling in step 3, the port intelligent equipment transmits data through the dual-redundancy communication architecture. When the communication quality of the main path deteriorates, based on the main path score output in step 2 and the backup path score , path switching and automatic back switching are performed.

[0068] The application adopts a hysteresis comparison strategy to avoid frequent switching of the main path and the backup path. The hysteresis comparison strategy is jointly constituted by a dual-threshold judgment mechanism and a score trend judgment logic. Specifically, the following sub-steps are included:

[0069] Step 4.1: Set the upper limit threshold of the main path score to 0.85 and the lower limit threshold of the main path score to 0.45. At the same time, define the number of consecutive periods as 3 and the main path score difference threshold as 0.05.

[0070] Step 4.2: In each sampling period , the main path outputs the main path score . The main path switching condition is that the score is strictly decreasing in 3 consecutive periods, and the path score in the current period is lower than the lower limit threshold of the main path score 0.45. In this embodiment, the expression is:

[0071] (8)

[0072] wherein represents the current period, represents the previous period, and so on; represents the main path score in the current period, represents the main path score in the previous period, and so on.

[0073] When the condition shown in formula (8) is met in this embodiment, it is determined that the communication quality of the main path is continuously deteriorating, and path switching is triggered immediately, and the main path data task is migrated to the backup path for transmission.

[0074] Step 4.3: After switching to the backup path, the main path still outputs the main path score in each sampling period . The condition for automatic back switching of the main path is that the score is higher than the upper limit threshold 0.85 in 3 consecutive periods, and the score difference of any two adjacent periods is less than the score difference threshold 0.05. In this embodiment, the expression is:

[0075] (9)

[0076] wherein the judgment of the score difference of the two adjacent periods covers all consecutive period pairs.

[0077] When the embodiment satisfies the condition shown in formula (9), it is determined that the main path communication quality is stably recovered, a back switch instruction is issued, and the normal communication path configuration is restored.

[0078] Through the embodiment, the port operation equipment communication system can keep data uninterrupted, switching seamless, and task stable execution under the working conditions of main path failure, signal shielding, or path degradation, and realize stable intelligent communication support in a high interference environment.

[0079] The above-described embodiments only express the implementation of the present application, but cannot be interpreted as a limitation on the scope of the patent of the present application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application.

Claims

1. A method for designing a dual-redundant communication architecture of port intelligent equipment, characterized in that, The dual-path redundancy communication architecture design method comprises a design stage, a monitoring stage, an optimization stage and a recovery stage, and specifically comprises the following steps: Step 1: constructing a dual-path communication architecture in the design stage; Step 2: establishing a path state monitoring and scoring mechanism in the monitoring stage; The double path constructed in step 1 is continuously monitored in state, and a path scoring mechanism is established, and the main path score is output and the backup path score ; Step 3: performing dynamic task scheduling in the optimization stage; Main path score based on step 2 output Backup path score Perform data task hierarchical scheduling; divide the data task into three levels, specifically: the first level is the control instruction, which is transmitted only by the main path; the second level is the device state data, which is distributed to the dual-path transmission according to the dynamic shunt weight; the third level is the log data, which is transmitted only by the backup path; Step 4: realizing path switching and automatic back switching in the recovery stage; After the dynamic task scheduling in step 3, the port intelligent equipment transmits data through a dual-redundancy communication architecture; when the communication quality of the main path deteriorates, the main path score output based on step 2 and the backup path score Perform path switching and automatic back switching; and adopt a hysteresis comparison strategy to avoid frequent switching of the main path and the backup path; Characterized in that, in step 4, the hysteresis comparison strategy is jointly constituted by a dual-threshold judgment mechanism and a scoring trend judgment logic; specifically comprising the following sub-steps: Step 4.1: set the upper threshold of the main path score as , and the lower threshold of the main path score as , wherein and are preset constants, and ; at the same time, define the number of continuous periods and the difference threshold of the main path score , wherein and are preset parameters; Step 4.2: Master path in each sampling period Output master path score ; master path switching condition is In strictly decreasing trend in consecutive periods, and the path score of the current period is lower than the lower threshold of the master path score ; represented as: ； wherein, denotes the current period, denotes the previous period, and so on; denotes the current period main path score, denotes the previous period main path score, and so on; If the condition shown in the formula of step 4.2 is met, it is determined that the main path communication quality is continuously deteriorating, and path switching is triggered immediately, and the main path data task is migrated to the backup path for transmission; Step 4.3: After switching to the backup path, the main path is still in each sampling period Output the main path score The condition for automatically switching back to the main path is In Consecutive periods are higher than the upper threshold of the main path score , and the score difference of any two adjacent periods is less than the main path score difference threshold , which is expressed as: ； Wherein, the judgment of the score difference of adjacent two periods covers all continuous period pairs; If the condition shown in the formula of step 4.3 is met, it is determined that the main path communication quality is stably recovered, a back switching instruction is issued, and the normal communication path configuration is restored; Characterized in that, in step 4.1, the upper threshold value of the main path score is 0.8-0.9; the lower threshold value of the main path score is 0.4-0.6; the number of continuous periods is 2-5; the difference threshold value of the main path score is 0.01-0.

1.

2. The method of claim 1, wherein, The step 1 specifically comprises: Step 1.1: deploying a dual-mode communication terminal on each port intelligent equipment, which integrates two completely independent communication modules, radio frequency channels and network interfaces; Step 1.2: According to the prior art and actual needs, two independent double-path communication paths in the physical layer and the logical layer are constructed, and the double paths are respectively a main path and a backup path .

3. The method of claim 2, wherein, The step 2 specifically comprises: Step 2.1: with fixed sampling period Five parameters of the main path and the standby path are collected: received signal strength , signal-to-noise ratio , round-trip delay , bit error rate , and channel occupancy rate , and the five parameters are processed by a sliding window. Step 2.2: standardize the five parameters collected in step 2.1 to obtain standard values, then the standard values of received signal strength , signal-to-noise ratio , round-trip delay , bit error rate , channel occupancy rate are standard received signal strength , standard signal-to-noise ratio , standard round-trip delay , standard bit error rate , standard channel occupancy rate ; Step 2.3: The standard value obtained after standardization in step 2.2 is subjected to main path and standby path score calculation according to the path scoring mechanism; the model of the path scoring mechanism is as follows: As follows: ； wherein, respectively, the weight coefficients of the standard received signal strength , the standard signal-to-noise ratio , the standard round-trip delay , the standard bit error rate , the standard channel occupancy rate .

4. The method of claim 3, wherein, In step 2.1, the sliding window processing refers to that the window covers new one period data and removes the earliest period data each time sliding forward, the window size is sample periods, and each parameter data corresponds to values in the sliding window.

5. The method of claim 3, wherein, In step 2.2, the standardization processing is as follows: for the received signal strength , the signal-to-noise ratio , the parameter data whose value is the greater the better , are processed using the following formula: ； wherein, represents a standardized value of the parameter data after standardization; represents parameter data; represents the maximum value of x corresponding to the values within the window corresponds to the maximum value of x corresponding to the values within the window represents the minimum value of x corresponding to the values within the window the minimum value of x corresponding to the values within the window for round trip delay , bit error rate , channel occupancy , the parameter data whose value is smaller is better , are processed by the following formula: ； wherein, represents a standardized value of the parameter data after standardization; represents parameter data; represents the maximum value of the values within the window corresponds to the maximum value of the values within the window; represents the minimum value of the values within the window corresponds to the minimum value of the values within the window.

6. The method of claim 3, wherein, In step 3, in the secondary data task, the calculation method of dynamic shunt weight is as follows: ； ； wherein, represents the primary path split weight; represents the backup path split weight; represents the primary path score; represents the backup path score; The secondary data task is respectively allocated to the primary path and the standby path in proportion to , .

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