A satellite-ground dual-link switching method for power communication

Abstract

The application relates to the technical field of electric power communication, and specifically provides a satellite-ground dual-link switching method for electric power communication, which comprises the following steps: acquiring ground link state data and satellite link state data; dividing each electric power communication service to be transmitted into transmission priorities according to service types; calculating a ground link quality score according to a communication scene and the ground link state data; calculating a satellite link quality score according to the communication scene and the satellite link state data; and determining a transmission link and a transmission link switching scheme for each electric power communication service based on the communication scene, the ground link quality score, the satellite link quality score and the transmission priorities of the electric power communication services. The method can objectively quantify link quality, finely divide service priorities, adapt to various electric power communication scenes, effectively inhibit ping-pong switching, realize smooth and uninterrupted switching, guarantee core service transmission and reduce communication costs.

Description

Technical Field

[0001] This invention relates to the field of power communication technology, and in particular to a satellite-to-ground dual-link switching method for power communication. Background Technology

[0002] Power distribution network automation is a core component of smart grid construction, enabling the collection of distribution network operation data, execution of fault handling commands, and intelligent monitoring and control. Power emergency communication is a crucial guarantee for responding to emergencies such as natural disasters and equipment failures. Both rely on stable and efficient communication links. Currently, power distribution network automation and emergency communication mainly rely on 4G / 5G terrestrial public networks for data transmission, which has advantages such as high bandwidth, low latency, and controllable cost, meeting the needs of daily monitoring and routine command communication. Satellite communication, with its wide-area coverage, strong resilience, and independence from geographical environment and disasters, has become an important backup method in the event of terrestrial public network failures and has been gradually applied to scenarios such as distribution network coverage in remote mountainous areas and emergency communication in disaster areas. At present, power business communication is mainly based on single links, and the few dual-link applications are limited to terrestrial cellular networks, without achieving adaptive dynamic switching between satellite links and terrestrial public network links.

[0003] Existing satellite-to-ground dual-link handover methods mostly rely on a single link status threshold for handover. They only collect basic indicators such as bandwidth and latency, using fixed thresholds to determine link anomalies and execute handover. While some solutions perform simple high- and low-priority classifications of services, they lack refined grading standards tailored to the characteristics of the power industry and cannot dynamically adjust handover strategies based on service priorities. Furthermore, these solutions use fixed-period link status collection, making it difficult to balance real-time monitoring with equipment energy consumption. The lack of robust data caching and synchronization mechanisms makes data loss and service interruptions during handover prone to occur, and the absence of a "ping-pong handover" suppression mechanism means that even slight fluctuations in link indicators can trigger frequent handovers. In addition, existing technologies do not design differentiated strategies for specific scenarios such as urban / remote mountain distribution network automation and emergency communication during natural disasters / equipment failures. Uniform handover rules and parameters can easily lead to wasted satellite link resources or insufficient emergency support, and they cannot achieve refined allocation of bandwidth resources based on link characteristics and service priorities, failing to meet the high reliability and scenario-specific usage requirements of power communication. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a satellite-to-ground dual-link handover method for power communication. This method can objectively quantify link quality, finely divide service priorities, adapt to various power communication scenarios, effectively suppress ping-pong handover, and ensure the transmission of core services.

[0005] To achieve the above objectives, the present invention is implemented using the following technical solution:

[0006] This invention provides a satellite-to-ground dual-link handover method for power communication, comprising:

[0007] Acquire ground link status data and satellite link status data;

[0008] The power communication services to be transmitted are prioritized according to their service type.

[0009] Based on the communication scenario and the ground link status data, a ground link quality score is calculated; based on the communication scenario and the satellite link status data, a satellite link quality score is calculated.

[0010] Based on the communication scenario, terrestrial link quality score, satellite link quality score, and transmission priority of each power communication service, the transmission link adopted by each power communication service and the corresponding transmission link switching scheme are determined.

[0011] In some embodiments of the present invention, acquiring ground link status data and satellite link status data includes:

[0012] According to the preset first acquisition cycle, the first operating status parameters of the ground link are acquired;

[0013] According to the preset second acquisition cycle, the second operating status parameters of the satellite link are acquired;

[0014] The first operating status parameter is subjected to outlier removal, missing value filling and normalization to obtain the ground link status data;

[0015] The second operating status parameter is subjected to outlier removal, missing value filling and normalization processing to obtain the satellite link status data.

[0016] In some embodiments of the present invention, the first operating state parameters include: signal strength, uplink bandwidth, downlink bandwidth, transmission delay, packet loss rate, and link availability;

[0017] The second operating status parameters include: signal strength, uplink bandwidth, downlink bandwidth, transmission delay, packet loss rate, link availability, and cost consumption rate.

[0018] In some embodiments of the present invention, the transmission priorities of the various power communication services to be transmitted are divided according to service type, including:

[0019] Based on the service type, the transmission priority of each power communication service is divided into P1, P2, P3 and P4 levels from high to low;

[0020] Among them, P1 level services include: distribution network FA fault location, isolation and recovery instructions, power emergency repair instructions, life safety related information and emergency high-definition video transmission services;

[0021] P2 level services include: power distribution terminal monitoring data, remote control and adjustment commands for power distribution network SCADA system, and emergency field equipment status data transmission services.

[0022] P3 level services include: historical data of distribution network automation, equipment inspection data, non-real-time emergency commands, and log data transmission services.

[0023] P4 level services include: distribution network operation and maintenance office data and non-emergency notification transmission services.

[0024] In some embodiments of the present invention, the communication scenarios include: daily communication scenarios for distribution network automation and power emergency communication scenarios;

[0025] The daily communication scenarios for distribution network automation include: urban distribution network automation sub-scenario and remote mountainous area distribution network automation sub-scenario;

[0026] The power emergency communication scenario includes: a natural disaster emergency sub-scenario and an equipment failure emergency sub-scenario.

[0027] In some embodiments of the present invention, a ground link quality score is calculated based on the communication scenario and the ground link status data, including:

[0028] Based on the communication scenario and the ground link status data, the analytic hierarchy process (AHP) is used to determine the ground link availability score, latency score, packet loss rate score, bandwidth score, and economic score.

[0029] The terrestrial link quality score is calculated based on the link availability score, latency score, packet loss rate score, bandwidth score, and cost-effectiveness score.

[0030] In some embodiments of the present invention, the calculation formula for the ground link quality score is as follows:

[0031] ;

[0032] in, Indicates link availability score; Indicates the weight of the link availability score; Indicates latency score; Indicates the weight of the latency score; This indicates the packet loss rate score; Indicates the weight of the packet loss rate score; Indicates bandwidth score; Indicates the bandwidth score weight; Indicates the economic performance score; Indicates the weighting of the economic score; .

[0033] In some embodiments of the present invention, based on the communication scenario, terrestrial link quality score, satellite link quality score, and transmission priority of each power communication service, the transmission link used by each power communication service is determined, including:

[0034] In the context of routine communication in distribution network automation, the transmission links used for each power communication service are determined, including:

[0035] If the ground link quality score is greater than the preset first daily quality threshold, P1 to P4 level services are carried by the ground link, and the satellite link is in standby mode.

[0036] When the ground link quality score is between the preset second daily quality threshold and the first daily quality threshold, P1 and P2 level services adopt satellite-ground dual-link cooperative transmission, while P3 and P4 level services are carried by the ground link.

[0037] In the event that the ground link quality score is less than the second daily quality threshold or the ground link is interrupted, P1 to P4 level services are carried by the satellite link.

[0038] Wherein, the first daily quality threshold is greater than the second daily quality threshold.

[0039] In some embodiments of the present invention, the transmission link used by each power communication service is determined based on the communication scenario, terrestrial link quality score, satellite link quality score, and transmission priority of each power communication service, and further includes:

[0040] In the case where the communication scenario is a power emergency communication scenario, the transmission links used by each power communication service are determined, including:

[0041] The satellite link is pre-activated to hot standby status, suspending P4 level service transmission;

[0042] If the ground link quality score is greater than the preset first emergency quality threshold, P1 to P3 level services will be carried by the ground link.

[0043] When the ground link quality score is between the preset second emergency quality threshold and the first emergency quality threshold, P1 and P2 level services adopt satellite-ground dual-link cooperative transmission, while P3 level services are carried by the ground link.

[0044] In the event that the ground link quality score is less than the second emergency quality threshold or the ground link is interrupted, P1 to P3 level services will be carried by the satellite link.

[0045] Wherein, the first emergency quality threshold is greater than the second emergency quality threshold.

[0046] In some embodiments of the present invention, the transmission link switching scheme includes:

[0047] If the difference between the ground link quality score and the satellite link quality score is less than a preset score difference threshold, link handover will not be triggered.

[0048] If the link status is restored and the link stability duration requirement for the corresponding communication scenario is met, then perform link back-switching.

[0049] If the number of back-and-forth switching between the satellite and ground links reaches a preset threshold within a preset time, the scoring difference threshold will be increased and / or the link stability duration will be extended.

[0050] Compared with the prior art, the above-described technical solution of the present invention has the following advantages:

[0051] In this embodiment of the invention, the proposed satellite-to-ground dual-link handover method for power communication constructs an objective and quantitative link quality evaluation system based on pure link status indicators. It dynamically adjusts weight coefficients according to communication scenarios, providing accurate and reliable data support for link handover decisions. Simultaneously, it achieves fine-grained priority classification at the individual granularity of each power communication service, prioritizing the transmission of urgent core services during link scheduling and resource allocation. This fully meets the high reliability and real-time core communication requirements of power services. The method customizes differentiated handover rules for daily communication scenarios in power distribution network automation, power emergency scenarios, and sub-scenarios such as urban distribution networks, remote mountainous areas, natural disasters, and equipment failures. It can comprehensively adapt to complex and ever-changing power communication environments, achieving optimal allocation of satellite-to-ground link resources.

[0052] This method effectively suppresses the ping-pong handover problem between satellite and ground links through a triple collaborative mechanism of scoring difference threshold blocking, link stability duration constraint, and dynamic parameter adaptive adjustment, reducing equipment loss and energy consumption, and ensuring the continuous and stable operation of power communication services. At the same time, it achieves smooth handover of satellite and ground links by relying on standardized handover execution procedures and data cache synchronization mechanisms, ensuring uninterrupted service and no data loss during the handover process, while taking into account the security and integrity of power communication data transmission.

[0053] This method prioritizes utilizing the low-cost, high-bandwidth transmission resources of terrestrial public networks for service delivery, while finely scheduling satellite links and using them exclusively for core service assurance. This improves the overall utilization rate of link resources while effectively reducing satellite communication costs. The overall solution adopts a modular architecture design, is compatible with multiple types of terrestrial public networks and satellite links, and possesses good versatility and scalability, enabling it to adapt to the iterative upgrade needs of new power system distribution network automation and emergency communication. Attached Figure Description

[0054] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other embodiments based on these drawings without creative effort.

[0055] Figure 1 This is a flowchart illustrating a satellite-to-ground dual-link switching method for power communication provided in an embodiment of the present invention.

[0056] Figure 2 This is a schematic diagram of the structure of the electronic device provided in an embodiment of the present invention. Detailed Implementation

[0057] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0058] like Figure 1 As shown, this embodiment of the invention provides a satellite-to-ground dual-link switching method for power communication. Figure 1 This is a flowchart illustrating a satellite-to-ground dual-link handover method for power communication. This flowchart only shows the logical sequence of the method in this embodiment. In other possible embodiments of the invention, different methods may be used, provided they do not conflict. Figure 1 Complete the steps shown or described in the order indicated.

[0059] See Figure 1 The method of this invention specifically includes the following steps:

[0060] Step S101: Obtain ground link status data and satellite link status data.

[0061] Link status awareness is the foundation of the entire handover method. By collecting the operating parameters of ground links and satellite links in real time and accurately, it completes data preprocessing and anomaly detection, providing reliable data support for subsequent intelligent decision-making.

[0062] In this embodiment of the invention, step S101 may include:

[0063] Step S1011: Collect the first operating status parameters of the ground link according to the preset first acquisition cycle; collect the second operating status parameters of the satellite link according to the preset second acquisition cycle.

[0064] The first acquisition cycle of the terrestrial link and the second acquisition cycle of the satellite link can be set according to the communication scenario.

[0065] In this embodiment of the invention, the communication scenarios are divided into daily communication scenarios for distribution network automation and power emergency communication scenarios.

[0066] In the daily communication scenarios of distribution network automation, the value range of the first acquisition cycle is 100ms to 1s, and the value range of the second acquisition cycle is 1s to 5s.

[0067] In power emergency communication scenarios, the acquisition cycle is shortened. The value range of the first acquisition cycle is 50ms to 100ms, and the value range of the second acquisition cycle is 500ms to 1s.

[0068] In addition, when the first or second operating status parameter fluctuates abnormally, or when an emergency collection request is received, high-frequency collection is automatically triggered to shorten the collection cycle and capture changes in the link status more quickly.

[0069] The first set of operating status parameters may include signal strength, uplink bandwidth, downlink bandwidth, transmission delay, packet loss rate, link availability, and base station load.

[0070] The second set of operating status parameters may include: signal strength, uplink bandwidth, downlink bandwidth, transmission delay, packet loss rate, link availability, satellite-to-ground link jitter, and tariff consumption rate, etc.

[0071] Step S1012: Perform outlier removal, missing value filling, and normalization on the first operating status parameter to obtain ground link status data; perform outlier removal, missing value filling, and normalization on the second operating status parameter to obtain satellite link status data.

[0072] Outliers in the collected data were removed using the 3σ criterion, missing data were filled in by linear interpolation, and the operating status parameters of different magnitudes were normalized to map the operating status parameter values ​​to the [0,1] interval, ensuring the accuracy and comparability of the data.

[0073] Furthermore, in this embodiment of the invention, during the process of collecting the first operating status parameters of the ground link and the second operating status parameters of the satellite link, the ground link packet loss rate is required to be ≤1% and the latency is required to be ≤100ms, and the satellite link packet loss rate is required to be ≤5% and the latency is required to be ≤1000ms. If a certain parameter fails to meet the requirements for three consecutive collection cycles, it is determined to be a link abnormality, and an abnormality warning is immediately sent to the power communication management terminal, and abnormal data is uploaded synchronously.

[0074] Step S102: Prioritize the transmission of each power communication service to be transmitted according to its service type.

[0075] In this embodiment of the invention, based on the service type, the transmission priority of each power communication service is divided into P1 level emergency core service, P2 level important service, P3 level regular service and P4 level non-core service from high to low.

[0076] Among them, P1 level services include: distribution network FA fault location, isolation and recovery instructions, power emergency repair instructions, life safety related information and emergency high-definition video transmission services.

[0077] P1 level services generally require latency ≤ 500ms (FA services ≤ 100ms) and packet loss rate ≤ 1%.

[0078] P2 level services include: power distribution terminal monitoring data, remote control and adjustment commands for the power distribution network SCADA system, and emergency field equipment status data transmission services.

[0079] P2 level services generally require latency ≤1000ms and packet loss rate ≤3%.

[0080] P3 level services include: historical data of distribution network automation, equipment inspection data, non-real-time emergency commands, and log data transmission services.

[0081] P3 level services generally require latency ≤5000ms and packet loss rate ≤5%.

[0082] P4 level services include: distribution network operation and maintenance office data and non-emergency notification transmission services.

[0083] P4 level services generally do not have strict requirements for latency and packet loss rate.

[0084] Step S103: Calculate the ground link quality score based on the communication scenario and ground link status data; calculate the satellite link quality score based on the communication scenario and satellite link status data.

[0085] In this embodiment of the invention, calculating the ground link quality score based on the communication scenario and ground link status data may include:

[0086] Step S1031: Based on the communication scenario and ground link status data, determine the link availability score, latency score, packet loss rate score, bandwidth score, and economic score using the Analytic Hierarchy Process (AHP).

[0087] The Analytic Hierarchy Process (AHP) decomposes complex link quality assessment into a hierarchical structure of target layer, criterion layer, and indicator layer. It uses the 1-9 scale to compare the importance of five scoring indicators of ground links—link availability, latency, packet loss rate, bandwidth, and economy—pairwise. It constructs a judgment matrix and, after normalization calculation and consistency verification, obtains objective weights suitable for the scenario, avoiding subjective assignment bias and providing a reliable basis for link quality quantification.

[0088] In the daily communication scenarios of distribution network automation, with real-time performance and economy as the core orientation, a judgment matrix is ​​constructed according to the importance order of latency and economy first, followed by packet loss rate and bandwidth. The weight coefficients of the five scoring indicators are determined by solving the feature vector and verifying consistency (CR < 0.1). Then, based on the ground link status data, the link availability score, latency score, packet loss rate score, bandwidth score and economy score are calculated respectively.

[0089] In both daily communication scenarios for distribution network automation and emergency power communication scenarios, the link availability score weights for terrestrial links and satellite links are the highest among the five scoring indicators. This ensures that when the link availability score is 0, the corresponding link quality score is low enough to trigger link switching.

[0090] Based on the ground link status data that has undergone outlier removal, missing value imputation, and normalization, five individual scores are calculated item by item. The value of each score ranges from 0 to 100.

[0091] Link availability score directly uses the normalized link availability value, with 100 for available time and 0 for unavailable time. Latency score is a reverse mapping of normalized transmission latency; the lower the latency, the higher the score. Packet loss rate score is similarly a reverse mapping of normalized packet loss rate; the lower the packet loss rate, the higher the score. Bandwidth score is calculated based on normalized uplink and downlink bandwidth and base station load; the larger the effective bandwidth and the lighter the load, the higher the score. Terrestrial links are cheaper than satellite links, so they are considered economical by default; therefore, the economic score for terrestrial links is the highest value of 100.

[0092] In the context of power emergency communication, reliability and real-time performance are the primary principles. The weight of link availability and latency indicators is increased, while the weight of economic indicators is reduced. The judgment matrix is ​​reconstructed and the weight calculation is completed. The calculation rules for individual scores are consistent with those in daily scenarios. Finally, the weighted sum of each individual score and the corresponding scenario weight coefficient is obtained to obtain a ground link quality score that meets the needs of emergency communication, providing accurate quantitative support for satellite-ground dual-link switching decisions.

[0093] Step S1032: Calculate the terrestrial link quality score based on the link availability score, latency score, packet loss rate score, bandwidth score, and economic score.

[0094] The formula for calculating the terrestrial link quality score is as follows:

[0095] ;

[0096] in, Indicates link availability score; Indicates the weight of the link availability score; Indicates latency score; Indicates the weight of the latency score; This indicates the packet loss rate score; Indicates the weight of the packet loss rate score; Indicates bandwidth score; Indicates the bandwidth score weight; Indicates the economic performance score; Indicates the weighting of the economic score; .

[0097] When calculating the satellite link quality score, the analytic hierarchy process (AHP) is also used to determine the link availability score, latency score, packet loss rate score, bandwidth score, and cost-effectiveness score.

[0098] For the satellite link status data after outlier removal, missing value imputation, and normalization, link availability score, latency score, packet loss rate score, bandwidth score, and economic efficiency score are calculated item by item. The link availability score directly uses the normalized link availability value; the higher the value, the higher the link availability and the corresponding score. The latency score is a reverse mapping of the normalized transmission latency; the lower the transmission latency, the higher the score. The packet loss rate score uses the same reverse mapping method; the lower the normalized packet loss rate, the better the link transmission stability and the corresponding score.

[0099] The bandwidth score is calculated based on the normalized uplink bandwidth, downlink bandwidth, and signal strength. The more abundant the bandwidth resources and the more stable the signal strength, the higher the bandwidth score. The economic score is a reverse mapping of the normalized cost consumption rate. The lower the cost consumption rate per unit time, the better the cost of using the satellite link, and the higher the economic score.

[0100] The other processes for calculating the satellite link quality score are similar to those for calculating the terrestrial link quality score, and will not be described in detail here.

[0101] In other embodiments of the present invention, machine learning algorithms such as BP neural networks and random forests can be used to build intelligent link quality evaluation models to obtain ground link quality scores and satellite link quality scores.

[0102] Specifically, a large-scale collection of basic link status data was conducted across different regions, time periods, and operational loads, covering core parameters such as transmission latency, packet loss rate, communication bandwidth, signal reception strength, and network load. Simultaneously, service transmission performance data under various scenarios was collected as foundational samples for model training. The collected raw data underwent standardized preprocessing including cleaning, noise reduction, and normalization to remove interference from outliers and to rationally divide the training and testing sample sets, providing high-quality data support for model training.

[0103] Using preprocessed sample data, selected machine learning models such as BP neural networks and random forests are iteratively trained, and the internal parameters of the models are continuously debugged and optimized. This enables the models to deeply learn the mapping relationship between link state parameters and transmission performance. Accuracy verification and performance optimization are completed through test samples. The well-trained intelligent evaluation model can break free from fixed weight constraints and autonomously adjust the evaluation logic according to the real-time communication environment, significantly improving the accuracy of link quality scoring and environmental adaptability. This compensates for the shortcomings of traditional scoring methods and provides more reliable data support that is more in line with the actual situation for intelligent switching decisions between satellite and ground links.

[0104] Step S104: Based on the communication scenario, terrestrial link quality score, satellite link quality score, and transmission priority of each power communication service, determine the transmission link adopted by each power communication service and the corresponding transmission link switching scheme.

[0105] In the context of routine communication in distribution network automation, the transmission links used for each power communication service are determined, including:

[0106] If the ground link quality score is greater than the preset first daily quality threshold, P1 to P4 level services are all carried independently by the ground link, and the satellite link is in standby mode.

[0107] When the ground link quality score is between the preset second daily quality threshold and the first daily quality threshold, P1 and P2 level services adopt satellite-ground dual link cooperative transmission, while P3 and P4 level services are independently carried by the ground link.

[0108] In the event that the terrestrial link quality score is less than the second daily quality threshold or the terrestrial link is interrupted, services of levels P1 to P4 are carried by satellite links.

[0109] In this embodiment of the invention, the first daily quality threshold is set to 80, and the second daily quality threshold is set to 60.

[0110] In the context of a power emergency communication scenario, the transmission links used by each power communication service are determined, including:

[0111] The satellite link is pre-activated to hot standby status, suspending P4 level service transmission;

[0112] If the ground link quality score is greater than the preset first emergency quality threshold, P1 to P3 level services will be carried by the ground link.

[0113] When the ground link quality score is between the preset second emergency quality threshold and the first emergency quality threshold, P1 and P2 level services adopt satellite-ground dual-link cooperative transmission, while P3 level services are carried by the ground link.

[0114] In the event that the ground link quality score is less than the second emergency quality threshold or the ground link is interrupted, P1 to P3 level services will be switched to satellite link.

[0115] In this embodiment of the invention, the first emergency quality threshold is set to 80, and the second emergency quality threshold is set to 60.

[0116] To suppress ping-pong handover, the handover scheme for the transmission link of the present invention includes:

[0117] If the difference between the ground link quality score and the satellite link quality score is less than a preset score difference threshold, link handover will not be triggered.

[0118] In this embodiment of the invention, the score difference threshold is set to 10. When the quality score difference between two links is less than 10, no switching is triggered.

[0119] If the link status is restored and the link stability duration requirement for the corresponding communication scenario is met, a link switchback is executed.

[0120] The required link stability duration for routine communication scenarios in power distribution network automation ranges from 30s to 60s; the required link stability duration for emergency power communication scenarios ranges from 10s to 30s.

[0121] If the number of back-and-forth switching between satellite and ground links reaches a preset threshold within a preset time, the scoring difference threshold will be increased and / or the link stability duration will be extended.

[0122] In this embodiment of the invention, the system caches historical handover records in real time, including handover time, link quality scores before and after the handover, handover type, link stability duration, and ping-pong handover flags. When the same link pair is detected to have two or more back-and-forth handovers within 3 minutes, it is determined to be a ping-pong handover event. The system automatically raises the handover score difference threshold from 10 to 15 and extends the back-handover stability duration by 50%. If no ping-pong handover occurs for 10 consecutive minutes, the default threshold is restored.

[0123] By using historical record caching and dynamic threshold adjustment, frequent jitter switching is avoided from a data-driven perspective, significantly reducing the probability of ping-pong switching and improving communication stability.

[0124] Furthermore, this embodiment of the invention achieves refined allocation of bandwidth resources for both satellite and ground links based on link quality and transmission priority: the ground link allocates bandwidth according to transmission priority, with P1 level services given priority, and P2 to P4 level services allocated the remaining bandwidth proportionally; the satellite link prioritizes bandwidth allocation for P1 level services in power emergency communication scenarios, and only maintains the minimum monitoring bandwidth in daily communication scenarios for distribution network automation; when both links are normal, P2 to P3 level services adopt load balancing transmission to improve resource utilization.

[0125] In some embodiments of the invention, to address the differentiated needs of various scenarios, the daily communication scenario for power distribution network automation is further divided into urban power distribution network automation sub-scenario and remote mountainous area power distribution network automation sub-scenario; the power emergency communication scenario is further divided into natural disaster emergency sub-scenario and equipment failure emergency sub-scenario. Targeted adjustments are made to the acquisition frequency, link quality threshold, switching rules, and resource allocation strategies to achieve scenario-based intelligent scheduling.

[0126] The satellite-to-ground dual-link switching method proposed in this invention is not only applicable to the power communication field, but can also be extended to multiple industry communication scenarios. It can be adapted to rail transit communication scenarios, meeting the needs of daily monitoring and emergency communication in rail transit, realizing intelligent switching between the terrestrial public network and satellite links, and ensuring the stable transmission of rail operation data and emergency dispatch instructions. It can also be applied to petrochemical communication scenarios, assisting in remote monitoring and on-site emergency repair work at chemical plants, making up for the shortcomings of terrestrial network coverage in remote operation areas, and completing reliable switching between satellite and ground links. At the same time, it can be used for forest fire prevention communication, adapting to the needs of wildfire monitoring and emergency command and dispatch, relying on the wide-area coverage capability of satellite communication combined with terrestrial communication networks to achieve real-time interaction of monitoring data and fire command information. It can also be applied to the field of marine engineering communication, building a communication support system for offshore operation platforms and ships, realizing autonomous switching between near-shore terrestrial communication networks and satellite links, and effectively improving the stability and overall reliability of communication transmission in various special operation scenarios.

[0127] The proposed method for dual-link handover between satellite and ground in power communication enables objective quantitative evaluation of link quality, providing a highly accurate and reliable basis for decision-making. The method establishes a quality scoring system based on the link's own operational status indicators. The scoring results are unaffected by service type. Furthermore, it dynamically adjusts weight parameters according to actual communication scenarios to achieve accurate quantitative assessment of satellite-ground link performance, thus laying a solid, objective, and stable data foundation for link handover decisions.

[0128] This invention's method incorporates scenario-based differentiated switching logic, enabling comprehensive adaptation to various power communication application scenarios. Dedicated switching strategies are set for daily distribution network automation communication, power emergency communication, and various subdivided application scenarios. The operating rules of each scenario do not interfere with each other, allowing for adaptation to complex operating conditions such as urban distribution networks, remote areas, natural disasters, and equipment failures, maximizing the optimization of link resource allocation.

[0129] This invention effectively improves communication stability through a ping-pong handover suppression mechanism. By employing multiple control methods, including scoring difference blocking, link stability duration constraints, and adaptive dynamic parameter adjustment, it mitigates the frequent handover problems caused by link index fluctuations, reduces communication equipment operating losses and energy consumption, and ensures the continuous and stable operation of power communication services.

[0130] An embodiment of the present invention also provides a non-transitory machine-readable medium storing a computer program, wherein the computer program, when executed by a computer's processor, is used to cause the computer to perform the satellite-to-ground dual-link handover method for power communication according to an embodiment of the present invention.

[0131] An embodiment of the present invention also provides a computer program product, including a computer program, wherein the computer program, when executed by a computer's processor, is used to cause the computer to perform the satellite-to-ground dual-link handover method for power communication according to an embodiment of the present invention.

[0132] An embodiment of the present invention also provides an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor. The memory stores a computer program executable by the at least one processor, which, when executed by the at least one processor, causes the electronic device to perform the satellite-to-ground dual-link handover method for power communication according to an embodiment of the present invention.

[0133] refer to Figure 2The present invention will now describe a structural block diagram of an electronic device that can serve as an embodiment of the present invention, serving as an example of a hardware device applicable to various aspects of the present invention. The electronic device is intended to represent various forms of digital electronic computer devices, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the present invention described and / or claimed herein.

[0134] like Figure 2 As shown, the electronic device includes a computing unit 101, which can perform various appropriate actions and processes based on a computer program stored in a read-only memory (ROM) 102 or a computer program loaded from a storage unit 108 into a random access memory (RAM) 103. The RAM 103 may also store various programs and data required for the operation of the electronic device. The computing unit 101, ROM 102, and RAM 103 are interconnected via a bus 104. An input / output (I / O) interface 105 is also connected to the bus 104.

[0135] Multiple components in the electronic device are connected to I / O interface 105, including: input unit 106, output unit 107, storage unit 108, and communication unit 109. Input unit 106 can be any type of device capable of inputting information into the electronic device. Input unit 106 can receive input digital or character information and generate key signal inputs related to user settings and / or function control of the electronic device. Output unit 107 can be any type of device capable of presenting information and may include, but is not limited to, a display, speaker, video / audio output terminal, vibrator, and / or printer. Storage unit 108 may include, but is not limited to, disks and optical discs. Communication unit 109 allows the electronic device to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks, and may include, but is not limited to, modems, network cards, infrared communication devices, and / or wireless communication transceivers, such as Bluetooth devices, WiFi devices, WiMax devices, cellular communication devices, and / or the like.

[0136] The computing unit 101 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the computing unit 101 include, but are not limited to, CPUs, graphics processing units (GPUs), various special-purpose artificial intelligence (AI) computing units, various computing units running machine learning model algorithms, digital signal processors (DSPs), and any suitable processor, controller, microcontroller, etc. The computing unit 101 performs the various methods and processes described above. For example, in some embodiments, the method embodiments of the present invention can be implemented as computer programs tangibly contained in a machine-readable medium, such as storage unit 108. In some embodiments, part or all of the computer program can be loaded and / or installed on an electronic device via ROM 102 and / or communication unit 109. In some embodiments, the computing unit 101 can be configured to perform the methods described above by any other suitable means (e.g., by means of firmware).

[0137] Computer programs for implementing the methods of embodiments of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor or controller of a general-purpose computer, special-purpose computer, or other programmable data processing apparatus, such that when executed by the processor or controller, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0138] In the context of embodiments of this invention, a machine-readable medium can be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. A machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. A machine-readable signal medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, or infrared systems, apparatus, or devices, or any suitable combination of the foregoing. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0139] It should be noted that the term "comprising" and its variations used in the embodiments of this invention are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The modifications of "one" and "a plurality" mentioned in the embodiments of this invention are illustrative and not restrictive, and those skilled in the art should understand that unless explicitly indicated otherwise in the context, they should be understood as "one or more".

[0140] The user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in the embodiments of this invention are subject to strict compliance with relevant laws, regulations, and regulatory requirements in their collection, storage, use, processing, transmission, provision, and disclosure, and adhere to the principles of legality, legitimacy, necessity, and good faith. The acquisition of relevant information and data is premised on the user's explicit consent or other legitimate reasons, and a clear and convenient authorization management approach is provided to the user, allowing the user to independently choose to consent, withdraw consent, or refuse to provide relevant information. For functions that rely on user information, if the user does not authorize or withdraws authorization, the corresponding technical function cannot be implemented, and the technical solution of this invention is not applicable in this scenario.

[0141] The steps described in the method embodiments provided by the present invention can be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of protection of the present invention is not limited in this respect.

[0142] The term "embodiment" in this specification refers to a specific feature, structure, or characteristic described in connection with an embodiment that may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily imply the same embodiment, nor does it imply independence or alternativeity from other embodiments. The various embodiments in this specification are described in a related manner, with reference to each other for similar or identical parts. In particular, for apparatus, device, and system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, and relevant details are referred to in the description of the method embodiments.

[0143] The above embodiments merely illustrate several implementation methods of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of protection. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A satellite-to-ground dual-link handover method for power communication, characterized in that, include: Acquire ground link status data and satellite link status data; The power communication services to be transmitted are prioritized according to their service type. Based on the communication scenario and the ground link status data, a ground link quality score is calculated. The satellite link quality score is calculated based on the communication scenario and the satellite link status data. Based on the communication scenario, terrestrial link quality score, satellite link quality score, and transmission priority of each power communication service, the transmission link adopted by each power communication service and the corresponding transmission link switching scheme are determined.

2. The satellite-to-ground dual-link handover method for power communication according to claim 1, characterized in that, Acquire ground link status data and satellite link status data, including: According to the preset first acquisition cycle, the first operating status parameters of the ground link are acquired; According to the preset second acquisition cycle, the second operating status parameters of the satellite link are acquired; The first operating status parameter is subjected to outlier removal, missing value filling and normalization to obtain the ground link status data; The second operating status parameter is subjected to outlier removal, missing value filling and normalization processing to obtain the satellite link status data.

3. The satellite-to-ground dual-link handover method for power communication according to claim 2, characterized in that, The first operating status parameters include: signal strength, uplink bandwidth, downlink bandwidth, transmission delay, packet loss rate, and link availability; The second operating status parameters include: signal strength, uplink bandwidth, downlink bandwidth, transmission delay, packet loss rate, link availability, and cost consumption rate.

4. The satellite-to-ground dual-link handover method for power communication according to claim 1, characterized in that, The various power communication services to be transmitted are prioritized according to their service type, including: Based on the service type, the transmission priority of each power communication service is divided into P1, P2, P3 and P4 levels from high to low; Among them, P1 level services include: distribution network FA fault location, isolation and recovery instructions, power emergency repair instructions, life safety related information and emergency high-definition video transmission services; P2 level services include: power distribution terminal monitoring data, remote control and adjustment commands for power distribution network SCADA system, and emergency field equipment status data transmission services. P3 level services include: historical data of distribution network automation, equipment inspection data, non-real-time emergency commands, and log data transmission services. P4 level services include: distribution network operation and maintenance office data and non-emergency notification transmission services.

5. The satellite-to-ground dual-link handover method for power communication according to claim 4, characterized in that, The communication scenarios include: daily communication scenarios for distribution network automation and power emergency communication scenarios; The daily communication scenarios for distribution network automation include: urban distribution network automation sub-scenario and remote mountainous area distribution network automation sub-scenario; The power emergency communication scenario includes: a natural disaster emergency sub-scenario and an equipment failure emergency sub-scenario.

6. The satellite-to-ground dual-link handover method for power communication according to claim 5, characterized in that, Based on the communication scenario and the ground link status data, a ground link quality score is calculated, including: Based on the communication scenario and the ground link status data, the analytic hierarchy process (AHP) is used to determine the ground link availability score, latency score, packet loss rate score, bandwidth score, and economic score. The terrestrial link quality score is calculated based on the link availability score, latency score, packet loss rate score, bandwidth score, and cost-effectiveness score.

7. The satellite-to-ground dual-link handover method for power communication according to claim 6, characterized in that, The formula for calculating the ground link quality score is as follows: ； in, Indicates link availability score; Indicates the weight of the link availability score; Indicates latency score; Indicates the weight of the latency score; This indicates the packet loss rate score; Indicates the weight of the packet loss rate score; Indicates bandwidth score; Indicates the bandwidth score weight; Indicates the economic performance score; Indicates the weighting of the economic score; .

8. The satellite-to-ground dual-link handover method for power communication according to claim 5, characterized in that, Based on the aforementioned communication scenario, terrestrial link quality score, satellite link quality score, and transmission priority of each power communication service, the transmission link used by each power communication service is determined, including: In the context of routine communication in distribution network automation, the transmission links used for each power communication service are determined, including: If the ground link quality score is greater than the preset first daily quality threshold, P1 to P4 level services are carried by the ground link, and the satellite link is in standby mode. When the ground link quality score is between the preset second daily quality threshold and the first daily quality threshold, P1 and P2 level services adopt satellite-ground dual-link cooperative transmission, while P3 and P4 level services are carried by the ground link. In the event that the ground link quality score is less than the second daily quality threshold or the ground link is interrupted, P1 to P4 level services are carried by the satellite link. Wherein, the first daily quality threshold is greater than the second daily quality threshold.

9. The satellite-to-ground dual-link handover method for power communication according to claim 8, characterized in that, Based on the aforementioned communication scenario, terrestrial link quality score, satellite link quality score, and transmission priority of each power communication service, the transmission link used by each power communication service is determined, which also includes: In the case where the communication scenario is a power emergency communication scenario, the transmission links used by each power communication service are determined, including: The satellite link is pre-activated to hot standby status, suspending P4 level service transmission; If the ground link quality score is greater than the preset first emergency quality threshold, P1 to P3 level services will be carried by the ground link. When the ground link quality score is between the preset second emergency quality threshold and the first emergency quality threshold, P1 and P2 level services adopt satellite-ground dual-link cooperative transmission, while P3 level services are carried by the ground link. In the event that the ground link quality score is less than the second emergency quality threshold or the ground link is interrupted, P1 to P3 level services will be carried by the satellite link. Wherein, the first emergency quality threshold is greater than the second emergency quality threshold.

10. The satellite-to-ground dual-link handover method for power communication according to claim 9, characterized in that, The switching scheme for the transmission link includes: If the difference between the ground link quality score and the satellite link quality score is less than a preset score difference threshold, link handover will not be triggered. If the link status is restored and the link stability duration requirement for the corresponding communication scenario is met, then perform link back-switching. If the number of back-and-forth switching between the satellite and ground links reaches a preset threshold within a preset time, the scoring difference threshold will be increased and / or the link stability duration will be extended.

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