5G differential adaptive link delay detection method and system

Abstract

The invention relates to a 5G differential adaptive link delay detection method and system. The method comprises the following steps: constructing a broadcast data packet embedded with a sending timestamp at a sending end, sending the broadcast data packet to a 5G network in a broadcast mode, and dynamically adjusting the broadcast frequency according to the state of the 5G network when the broadcast data packet is sent; and receiving the broadcast data packet at a receiving end, recording a receiving timestamp at the same time, and calculating the unidirectional network delay according to the sending timestamp and the receiving timestamp. The system comprises differential protection communication terminal devices which are respectively arranged in equipment of the differential protection system; the differential protection communication terminal device comprises a data encryption and decryption module, a 5G communication module and a delay detection module. According to the invention, resource consumption can be reduced, efficiency can be improved, network conditions can be dynamically adapted, unidirectional link delay can be accurately measured, and the method is especially suitable for realizing delay detection for a differential protection system configured for a power system in a 5G environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power system monitoring and communication technology, in particular to a method and system for realizing delay detection of a differential protection system configured for a power system in a 5G environment, for realizing accurate link delay measurement and adaptive network management. BACKGROUND

[0002] With the widespread deployment of 5G technology, the differential protection of the power system is facing new challenges. In the differential protection system of the power system, the traditional point-to-point communication test delay measurement method shows obvious limitations in the 5G environment: 1. The existing technology usually relies on resource-consuming point-to-point delay tests such as PING or ICMP, which is inefficient in high-density 5G networks; 2. The existing solution lacks the ability to dynamically adapt to changes in network conditions and cannot effectively utilize the high speed and low latency characteristics of 5G networks; 3. The existing solution cannot accurately measure one-way link delay, which is a serious defect for the power system differential protection with extremely high real-time requirements. SUMMARY

[0003] The purpose of the present application is to provide a 5G differential adaptive link delay detection method suitable for 5G conditions, which can reduce resource consumption, improve efficiency, dynamically adapt to network conditions, and accurately measure one-way link delay.

[0004] To solve the above technical problems / achieve the above purposes, the technical solution adopted by the present application is: A 5G differential adaptive link delay detection method for realizing delay detection of a differential protection system configured for a power system in a 5G environment, the 5G differential adaptive link delay detection method being: taking any device in the differential protection system as a sending end and the remaining devices as receiving ends; constructing a broadcast data packet embedded with a sending timestamp at the sending end, sending the broadcast data packet to the 5G network through broadcast, and dynamically adjusting the broadcast frequency according to the state of the 5G network when sending the broadcast data packet; receiving the broadcast data packet at the receiving end, recording a receiving timestamp at the same time, and calculating the one-way network delay according to the sending timestamp and the receiving timestamp.

[0005] According to the specific embodiment of the present application, the broadcast is performed using the connectionless UDP protocol.

[0006] Preferably, the broadcast data packet further includes a device ID and related state information.

[0007] Further, the sending end and the receiving end periodically synchronize their clocks according to a predetermined update period.

[0008] Preferably, the method for dynamically adjusting the broadcast frequency according to the state of the 5G network is: detecting the load state of the 5G network, when the load of the 5G network becomes high, reducing the broadcast frequency, and when the load of the 5G network becomes low, increasing the broadcast frequency.

[0009] Further preferably, the load state of the 5G network is determined according to the delay, packet loss rate and bandwidth usage rate of the 5G network.

[0010] The application also provides a 5G differential adaptive link delay detection system for implementing the above-mentioned 5G differential adaptive link delay detection method, and the scheme is: A 5G differential adaptive link delay detection system, comprising differential protection communication terminal devices respectively arranged in each device of the differential protection system; The differential protection communication terminal device comprises a data encryption and decryption module, a 5G communication module and a delay detection module, and the 5G communication module and the delay detection module are connected with the data encryption and decryption module respectively; In the differential protection communication terminal device of the device as the sending end, the data encryption and decryption module is used to construct a broadcast data packet embedded with a sending timestamp and transmit it to the 5G communication module, the 5G communication module is used to send the broadcast data packet to the 5G network in a broadcast mode, and when the broadcast data packet is sent, the broadcast frequency is dynamically adjusted according to the state of the 5G network; In the differential protection communication terminal device of the device as the receiving end, the 5G communication module is used to receive the broadcast data packet, the data encryption and decryption module is used to record a receiving timestamp, and the delay detection module is used to calculate the one-way network delay according to the sending timestamp and the receiving timestamp.

[0011] Preferably, the differential protection communication terminal device further comprises a quantum key module connected with the data encryption and decryption module, the quantum key module is used to provide a quantum key, and the data encryption and decryption module is a quantum encryption and decryption module based on the quantum key to realize data encryption and decryption.

[0012] According to one embodiment of the application, the differential protection communication terminal device further comprises a local communication module connected with the data encryption and decryption module, and the local communication module is connected with a data transmission unit of the device.

[0013] Preferably, the differential protection communication terminal device further comprises a storage module for storing the broadcast data packet and system logs.

[0014] By means of the technical scheme, the present application has the following advantages compared with the prior art: the present application can reduce resource consumption and improve efficiency, can dynamically adapt to network conditions, and can accurately measure one-way link delay, and is particularly suitable for implementing delay detection for a differential protection system configured for a power system in a 5G environment. BRIEF DESCRIPTION OF DRAWINGS

[0015] BRIEF DESCRIPTION OF DRAWINGS Figure 1 The figure is a flowchart of the 5G differential adaptive link delay detection method of the present application.

[0016] BRIEF DESCRIPTION OF DRAWINGS Figure 2 The figure is a schematic diagram of the principle of the 5G differential adaptive link delay detection system of the present application. DETAILED DESCRIPTION

[0017] In order to enable personnel in the technical field to better understand the present application scheme, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts should belong to the scope of protection of the present application.

[0018] Embodiment one: the differential protection system configured for a power system includes a plurality of devices, which can communicate with each other based on a 5G network.

[0019] As shown in the Figure 1 The 5G differential adaptive link delay detection method for implementing delay detection for a differential protection system configured for a power system in a 5G environment is as follows: Step 1: any device in the differential protection system is taken as a sending end, and the remaining devices are taken as receiving ends. Then a one-way link is formed between the device taken as the sending end and each device taken as the receiving end, and delay detection needs to be performed for the one-way link.

[0020] The sending end and the receiving end periodically synchronize their clocks according to a predetermined update period. Specifically, the following two aspects are included: (1) initial synchronization: when a device first joins the network, it performs an initial clock synchronization process, which includes communicating with the nearest NTP server through the 5G network to obtain accurate global coordinated time. This step ensures that all devices operate according to the same time reference before starting data exchange; (2) continuous synchronization update: to maintain synchronization accuracy, the system configures the device to periodically (e.g., once every minute) resynchronize its clock. In this way, the system can correct any time errors caused by local clock drift, ensuring the accuracy of delay measurement.

[0021] Step 2: Construct broadcast data packets embedded with sending time stamps at the sending end, and send the broadcast data packets to the 5G network through broadcasting. When sending the broadcast data packets, dynamically adjust the broadcast frequency according to the state of the 5G network.

[0022] Each device as a sending end constructs broadcast data packets according to the set broadcast time interval (i.e., at a set broadcast frequency). In addition to including the sending time stamp (using the synchronized precise time), the broadcast data packets also include the device ID and related state information. The accurate recording of the sending time stamp is crucial for subsequent demonstration calculations. An example of the frame structure of the constructed broadcast data packets is shown in the following table:

[0023] In this step, a dedicated network layer protocol can be developed to optimize the characteristics of the 5G network and support efficient broadcasting and synchronization. In this embodiment, the broadcasting is performed using the connectionless UDP protocol. Taking advantage of the high-speed data transmission capability of the 5G network, each device sends its broadcast data packets to the 5G network through broadcasting. Broadcasting uses the connectionless UDP protocol, which optimizes the latency and network resource usage in the transmission process.

[0024] Step 3: Receive the broadcast data packets at the receiving end, record the receiving time stamps, and calculate the one-way network delay based on the sending time stamps and the receiving time stamps.

[0025] All devices as receiving ends listen to the broadcasted broadcast data packets. Whenever a broadcast data packet is received, the local time of reception is immediately recorded as the receiving time stamp. Since all devices use precise time synchronized by the NTP protocol, these time stamps can accurately reflect the delay in the data transmission process.

[0026] Furthermore, the receiving end calculates the one-way delay: the receiving device uses the sending time stamp in the received broadcast data packet and the recorded receiving time stamp to calculate the difference between the two. This difference represents the one-way network delay from the sending device to the receiving device.

[0027] In Step 2 above, the method of dynamically adjusting the broadcast frequency according to the state of the 5G network is as follows: detect the load state of the 5G network (such as the delay, packet loss rate, and bandwidth usage of the 5G network); when the load of the 5G network becomes high, reduce the broadcast frequency; when the load of the 5G network becomes low, increase the broadcast frequency. The difference between the adjusted broadcast frequency and the previous broadcast frequency can be selected according to the test to choose a suitable value.

[0028] Data aggregation and analysis: After the delay detection, all the delay data is sent back to the central server or cloud platform for further analysis. The central server or cloud platform uses these data to evaluate the overall performance of the network, identify possible delay points, and optimize future broadcast intervals and network configurations.

[0029] Embodiment two: as shown in the accompanying Figure 2 A 5G differential adaptive link delay detection system for implementing the above-mentioned 5G differential adaptive link delay detection method, comprising differential protection communication terminal devices respectively arranged in each device of the differential protection system, and each differential protection communication terminal device is communicatively connected to each other.

[0030] The differential protection communication terminal device mainly includes a data encryption and decryption module, a 5G communication module and a delay detection module, and the 5G communication module and the delay detection module are connected with the data encryption and decryption module respectively.

[0031] In the differential protection communication terminal device in the device as the sending end, the data encryption and decryption module is used to build a broadcast data packet embedded with a sending timestamp and transmit it to the 5G communication module, and the 5G communication module is used to send the broadcast data packet to the 5G network by broadcast mode, and when sending the broadcast data packet, the broadcast frequency is dynamically adjusted according to the state of the 5G network.

[0032] In the differential protection communication terminal device in the device as the receiving end, the 5G communication module is used to receive the broadcast data packet, the data encryption and decryption module is used to record the receiving timestamp, and the delay detection module is used to calculate the one-way network delay according to the sending timestamp and the receiving timestamp.

[0033] In addition, the differential protection communication terminal device can also include a quantum key module, a local communication module, a power module, a storage module, etc., and the quantum key module, the local communication module and the storage module are connected with the data encryption and decryption module, and the power module is connected with other modules to provide power. The quantum key module is used to provide quantum keys, and at this time the data encryption and decryption module is a quantum encryption and decryption module based on quantum keys. The local communication module is connected with the data transmission unit (DTU) of the device, and is used to transmit data to the device. The storage module is used to store broadcast data packets and system logs.

[0034] In the above scheme, compatible 5G communication modules are installed on each device to ensure that they can support the required data transmission rate and network delay requirements, and it is also necessary to confirm that the 5G communication modules of all devices can access the nearest 5G base station to achieve the best network coverage and performance. The data encryption and decryption module needs to ensure sufficient processing power and memory to handle data collection, processing and broadcast requirements from the system. Install a storage module with sufficient capacity to support efficient data access and backup.

[0035] The data encryption and decryption module needs to be equipped with software to realize its functions, including the following aspects: 1. Operating system and client software installation: install or update to the recommended Linux operating system version on each device to ensure system security and stability; 2. Deploy the client software of the adaptive link latency detection system, including all necessary modules and dependencies; 3. Network and security configuration: configure network parameters to ensure that all devices can communicate effectively in the 5G network and comply with network security policies. Set up appropriate firewalls and security measures to prevent unauthorized access and data leakage.

[0036] The 5G differential adaptive link latency detection method and system proposed by the present application is designed specifically to solve the specific challenges of power system differential protection in the 5G environment. This solution solves the key problems in the prior art: 1. Reduce resource consumption and improve efficiency: By introducing a broadcast-based communication mechanism instead of traditional point-to-point latency testing (such as PING or ICMP), the present application significantly reduces network resource consumption. In a high-density 5G network environment, this method can more efficiently perform latency measurements, as it reduces network congestion and repeated data transmission; 2. Dynamically adapt to network conditions: The system of the present application uses adaptive synchronization technology, which can dynamically adjust the broadcast frequency according to real-time network load and latency conditions. This dynamic adjustment mechanism enables the system to effectively utilize the high speed and low latency characteristics of the 5G network, maintaining optimal communication efficiency and synchronization accuracy; 3. Accurate measurement of one-way link latency: The system achieves accurate measurement of one-way link latency by embedding precise time stamps in broadcast data packets and calculating the difference between reception time and transmission time at the receiving end. This method not only improves the accuracy of measurement, but also meets the extremely high real-time requirements of power system differential protection.

[0037] In summary: (1) The application uses a custom broadcast protocol based on UDP to replace the traditional point-to-point TCP communication mode, allowing devices to send time synchronization and delay measurement data in a broadcast manner. The UDP protocol reduces the handshake process and retransmission mechanism during data transmission, thereby reducing the overhead of the packet header and network congestion. The technical effect achieved: Compared with traditional TCP communication, UDP broadcast improves the real-time performance of network data transmission. In the 5G network environment, the connectionless feature of the UDP protocol allows data packets to be transmitted directly between devices, avoiding complex routing selection and network congestion management, thereby significantly improving data transmission efficiency. (2) The application can automatically adjust the frequency of broadcast according to real-time network conditions. Dynamically adjust communication parameters to adapt to current network conditions to optimize network resource usage. The technical effect achieved: Through real-time adjustment, the system can reduce data transmission when the network load is high to avoid excessive consumption of network bandwidth; increase the data transmission frequency when the network load is low to ensure the accuracy of time synchronization and the accuracy of delay measurement. The adaptive adjustment mechanism optimizes system operating parameters by monitoring network status (such as delay, packet loss rate, and bandwidth usage) in real time and applying feedback control theory to achieve optimal network performance and resource allocation. (3) The application innovatively introduces an accurate measurement method for one-way delay, which compares the sending timestamp in the received broadcast data packet with the locally recorded receiving timestamp to accurately calculate the transmission delay, which is crucial for differential protection of power systems. This method provides more accurate delay data than traditional round-trip time measurement by analyzing the time difference of one-way transmission.

[0038] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made in accordance with the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A 5G differential adaptive link delay detection method for implementing delay detection for a differential protection system configured for a power system in a 5G environment, characterized by: The 5G differential adaptive link delay detection method is: any device in the differential protection system is taken as a sending end, and the remaining devices are taken as receiving ends; a broadcast data packet embedding a sending timestamp is constructed at the sending end, the broadcast data packet is sent to the 5G network through broadcasting, and the broadcasting frequency is dynamically adjusted according to the state of the 5G network when the broadcast data packet is sent; the broadcast data packet is received at the receiving end, a receiving timestamp is recorded, and the one-way network delay is calculated according to the sending timestamp and the receiving timestamp.

2. The 5G differential adaptive link latency detection method of claim 1, wherein: Broadcasting is performed using the connectionless UDP protocol.

3. The 5G differential adaptive link latency detection method of claim 1, wherein: The broadcast data packet further includes a device ID and related state information.

4. The 5G differential adaptive link latency detection method of claim 1, wherein: The sending end and the receiving end periodically synchronize their clocks according to a predetermined update period.

5. The 5G differential adaptive link latency detection method of claim 1, wherein: The method for dynamically adjusting the broadcasting frequency according to the state of the 5G network is: detecting the load state of the 5G network, reducing the broadcasting frequency when the load of the 5G network becomes high, and increasing the broadcasting frequency when the load of the 5G network becomes low.

6. The 5G differential adaptive link latency detection method of claim 5, wherein: The load state of the 5G network is determined according to the delay, packet loss rate and bandwidth usage of the 5G network. 7.A 5G differential adaptive link latency detection system configured to implement the 5G differential adaptive link latency detection method according to any one of claims 1 to 6. The 5G differential adaptive link delay detection system includes differential protection communication terminal devices respectively arranged in each device of the differential protection system; The differential protection communication terminal device includes a data encryption and decryption module, a 5G communication module and a delay detection module, and the 5G communication module and the delay detection module are connected with the data encryption and decryption module; In the differential protection communication terminal device of the device as the sending end, the data encryption and decryption module is used to construct a broadcast data packet embedding a sending timestamp and transmit it to the 5G communication module, the 5G communication module is used to send the broadcast data packet to the 5G network through broadcasting, and the broadcasting frequency is dynamically adjusted according to the state of the 5G network when the broadcast data packet is sent; In the differential protection communication terminal device of the device as the receiving end, the 5G communication module is used to receive the broadcast data packet, the data encryption and decryption module is used to record a receiving timestamp, and the delay detection module is used to calculate the one-way network delay according to the sending timestamp and the receiving timestamp.

8. The 5G differential adaptive link latency detection system of claim 7, wherein: The differential protection communication terminal device further includes a quantum key module connected with the data encryption and decryption module, the quantum key module is used to provide a quantum key, and the data encryption and decryption module is a quantum encryption and decryption module based on the quantum key.

9. The 5G differential adaptive link latency detection system of claim 7, wherein: The differential protection communication terminal device further includes a local communication module connected with the data encryption and decryption module, and the local communication module is connected with a data transmission unit of the device.

10. The 5G differential adaptive link latency detection system of claim 7, wherein: The differential protection communication terminal device further includes a storage module for storing the broadcast data packet and system logs.

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