A DRX automatic configuration method and device based on LoRa

Abstract

The present invention discloses a DRX automatic configuration method and device based on LoRa, wherein the method includes: initializing sensor DRX; dynamically adjusting sensor DRX through dynamic adjustment API; establishing routing when the sensor is first connected, and issuing default DRX; configuring DRX when the sensor is connected for the second time; determining the difference between the expected data reporting time and the current data reporting time when the sensor is subsequently connected, recording it as an offset value, and calculating DRX according to the offset value; initializing when the sensor reports abnormally. The method and device dynamically adjust the reporting time of the sensor through DRX, evenly distribute the reporting time of the sensor within the reporting time window, realize the stable operation of the sensor within the reporting time, and ensure the online rate of the sensor equipment.

Description

Technical Field

[0001] The present invention relates to the field of power grid monitoring, and in particular to a DRX automatic configuration method and device based on LoRa. Background Art

[0002] With the development of social economy, the use of electricity in work and life is increasing every year, and the monitoring of the operating status of power equipment is becoming more and more important. Internet of Things technology has been widely used in various industries, especially in power grid monitoring. High-frequency partial discharge, ultra-high-frequency partial discharge, ultrasonic partial discharge and SF6 sensors are deployed on main transformer equipment, switch cabinets, circuit breakers, voltage transformers and bushings in GIS rooms.

[0003] Sensors in the substation report data through the LoRa 2.4GHz and 470MHz frequency bands. The 2.4GHz frequency band is mainly used for sensors to send short messages, and the transmission cycle is generally about 10 minutes, which is sent in a broadcast manner. The 470MHz frequency band is mainly used for edge and aggregation devices to form a network and to send long messages in packets. Network access is required for access. The size of the message is generally more than 10KB, and the transmission cycle is measured in minutes.

[0004] With the continuous development of communication technology, especially the rapid progress of 4G and 5G network technology and the application of NB and LoRa technology, the massive growth of IoT terminal devices has been promoted. At present, there are tens of billions of devices on the terminal network. Power IoT terminal devices have been deployed in environments such as substation, transmission and distribution. Since most of the environments are unmanned and remote, how to monitor the equipment has become an important part of the normal operation of the equipment. By deploying power sensors, the monitoring cost can be greatly reduced, the work efficiency can be improved, and people's living standards can be improved.

[0005] Wireless IoT terminal devices are different from ordinary IP devices in reporting. IP sensors only need to ensure the processing power of the server to collect a large amount of data in a short time. When wireless terminals use NB, LoRa, etc. to report data, although they support simultaneous reporting of multiple sensors, the number of channels supported is limited. When reporting through dozens or hundreds of terminals, air interface competition will occur, resulting in reporting failure. Summary of the invention

[0006] Since the number of 470MHz sensors deployed in substations generally ranges from dozens to hundreds, in order to ensure the stability of receiving and transmitting channels, the present invention provides a DRX automatic configuration method and device based on LoRa, which dynamically adjusts the reporting time of the sensor through DRX, and evenly distributes the reporting time of the sensor within the reporting time window, so as to achieve smooth operation of the sensor within the reporting time and ensure the online rate of the sensor equipment.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] In one embodiment of the present invention, a DRX automatic configuration method based on LoRa is proposed, and the method includes:

[0009] Sensor DRX initialization;

[0010] Dynamically adjust sensor DRX through dynamic adjustment API;

[0011] When the sensor is first connected, a route is established and a default DRX is issued;

[0012] DRX configuration is performed when the sensor is connected for the second time;

[0013] When the sensor is subsequently connected, the difference between the expected data reporting time and the current data reporting time is determined and recorded as the offset value, and the DRX is calculated based on the offset value;

[0014] The sensor reports an abnormality and is initialized.

[0015] Furthermore, the sensor DRX initialization includes:

[0016] During initialization, the data reporting time of the sensors is sorted according to the expected data reporting time;

[0017] Divide a day into time windows according to the length of the time window and the number of sensors reporting data at the same time;

[0018] The time window is set according to the DRX cycle pre-configured by the sensor.

[0019] Furthermore, when the sensor is connected for the second time, DRX configuration is performed, including:

[0020] When the sensor is connected for the second time, DRX configuration is performed. DRX cycle = expected data reporting time - next first packet time - current data reporting time - LoRa module initialization time;

[0021] The next first packet time = the last packet time + the default DRX cycle + the LoRa module initialization time;

[0022] If the next expected data reporting time is less than the next first packet time, the next expected data reporting time is used for calculation.

[0023] Furthermore, when the sensor is subsequently connected, the difference between the expected data reporting time and the current data reporting time is determined and recorded as an offset value, and the DRX is calculated according to the offset value, including:

[0024] When the sensor is subsequently connected, the difference between the expected data reporting time and the current reporting time is determined and recorded as the offset value. The calculation formula is: offset value = expected data reporting time - current data reporting time;

[0025] DRX is calculated according to the offset value, and the calculation formula is: DRX cycle = (next expected data reporting time - current tail packet time - last DRX cycle - LoRa module initialization time) - current data reporting time + LoRa module initialization time + offset value.

[0026] Furthermore, the sensor reports an abnormality for initialization, including:

[0027] If the difference between the sensor’s data reporting time and the expected data reporting time exceeds the abnormal factor multiplied by the DRX cycle, the sensor’s DRX adjustment logic is considered abnormal;

[0028] Set the sensor reporting times to 1, consider it as the first reporting, and send the default DRX cycle;

[0029] Re-adjust the sensor DRX.

[0030] In one embodiment of the present invention, a DRX automatic configuration device based on LoRa is also proposed, and the device includes:

[0031] A time allocation module, used to initialize the sensor DRX;

[0032] The dynamic adjustment module is used to dynamically adjust the sensor DRX through the dynamic adjustment API; establish a route when the sensor is first connected and send a default DRX; configure DRX when the sensor is connected for the second time; determine the difference between the expected data reporting time and the current data reporting time when the sensor is subsequently connected, record it as the offset value, and calculate DRX based on the offset value;

[0033] The abnormality reporting module is used to initialize the abnormality reported by the sensor.

[0034] Furthermore, the sensor DRX initialization includes:

[0035] During initialization, the data reporting time of the sensors is sorted according to the expected data reporting time;

[0036] Divide a day into time windows according to the length of the time window and the number of sensors reporting data at the same time;

[0037] The time window is set according to the DRX cycle pre-configured by the sensor.

[0038] Furthermore, when the sensor is connected for the second time, DRX configuration is performed, including:

[0039] When the sensor is connected for the second time, DRX configuration is performed. DRX cycle = expected data reporting time - next first packet time - current data reporting time - LoRa module initialization time;

[0040] The next first packet time = the last packet time + the default DRX cycle + the LoRa module initialization time;

[0041] If the next expected data reporting time is less than the next first packet time, the next expected data reporting time is used for calculation.

[0042] Furthermore, when the sensor is subsequently connected, the difference between the expected data reporting time and the current data reporting time is determined and recorded as an offset value, and the DRX is calculated according to the offset value, including:

[0043] When the sensor is subsequently connected, the difference between the expected data reporting time and the current reporting time is determined and recorded as the offset value. The calculation formula is: offset value = expected data reporting time - current data reporting time;

[0044] DRX is calculated according to the offset value, and the calculation formula is: DRX cycle = (next expected data reporting time - current tail packet time - last DRX cycle - LoRa module initialization time) - current data reporting time + LoRa module initialization time + offset value.

[0045] Furthermore, the sensor reports an abnormality for initialization, including:

[0046] If the difference between the sensor’s data reporting time and the expected data reporting time exceeds the abnormal factor multiplied by the DRX cycle, the sensor’s DRX adjustment logic is considered abnormal;

[0047] Set the sensor reporting times to 1, consider it as the first reporting, and send the default DRX cycle;

[0048] Re-adjust the sensor DRX.

[0049] In one embodiment of the present invention, a computer device is also proposed, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the aforementioned LoRa-based DRX automatic configuration method is implemented.

[0050] In one embodiment of the present invention, a computer-readable storage medium is further proposed, wherein the computer-readable storage medium stores a computer program for executing a LoRa-based DRX automatic configuration method.

[0051] Beneficial effects:

[0052] 1. The present invention dynamically adjusts DRX for each access of the LoRa 470MHz IoT sensor, which is more flexible than fixed DRX.

[0053] 2. The present invention can prevent sensors from reporting at the same time, resulting in data not being sent, by dynamically adjusting DRX.

[0054] 3. The present invention can dynamically adjust the data reporting time and the expected data reporting time. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a schematic diagram of the process of the DRX automatic configuration method based on LoRa of the present invention;

[0056] Figure 2 It is a structural schematic diagram of a DRX automatic configuration device based on LoRa of the present invention;

[0057] Figure 3 It is a schematic diagram of the computer device structure of the present invention. DETAILED DESCRIPTION

[0058] The principles and spirit of the present invention will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are provided only to enable those skilled in the art to better understand and implement the present invention, and are not intended to limit the scope of the present invention in any way. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0059] Those skilled in the art will appreciate that the embodiments of the present invention may be implemented as a system, device, apparatus, method or computer program product. Therefore, the present disclosure may be specifically implemented in the following forms, namely: complete hardware, complete software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.

[0060] According to the implementation mode of the present invention, a DRX automatic configuration method and device based on LoRa are proposed. The sensor data reporting time is first sorted according to the expected time, and initialized according to the pre-configured DRX at startup, and the time of a day is divided into equal parts according to the time window; the sensor data reporting time is set within the corresponding time window, and the number of sensors supported simultaneously in the time window can be configured, and the default is 1, which means that the time window is exclusive; if a certain sensor needs to report at a fixed time, it can be flexibly configured; the default is to generate the data reporting time of the last three times. Since DRX is sent when the 470MHz sensor access request is made, the current process is that the sensor establishes a route when it accesses for the first time; the edge gateway determines which aggregation gateway the sensor is accessed from when it accesses for the first time, and sends the default DRX. DRX configuration is performed when accessing for the second time. Since the sensor powers off the LoRa module after sending the data, the module power-on initialization time defaults to 17s. The DRX cycle is calculated by the following formula:

[0061] DRX cycle = expected data reporting time - next first packet time - current data reporting time - LoRa module initialization time; where the next first packet time = last packet time + default DRX cycle + LoRa module initialization time. During subsequent access, dynamically calculate whether the expected data reporting time is advanced or delayed from the actual reporting time. This value is the difference, and the next DRX is dynamically adjusted based on the difference.

[0062] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0063] Figure 1 FIG. 1 is a flow chart of the DRX automatic configuration method based on LoRa of the present invention. Figure 1 As shown, the following steps are used to configure the 470MHz sensor DRX:

[0064] Step S100: Sensor DRX initialization

[0065] The time allocation module of the program will sort the sensor data reporting time according to the expected data reporting time according to the pre-set configuration file (JSON file, which contains basic configuration parameters, such as time window length, number of supported sensors, etc.) during initialization, divide the time of one day into time windows according to the time window length (the default setting is 4 minutes) and the number of sensors reporting data at the same time (the default setting is 1), and set the time window according to the DRX cycle configured by the sensor. For example, if the DRX cycle of the sensor is 12 hours, two time windows will be occupied in one day.

[0066]

[0067] Step S101: Dynamically adjust API

[0068] The dynamic adjustment API is a dynamic adjustment of the sensor DRX cycle. For example, the DRX cycle of all sensors on the main transformer equipment of the substation needs to be set to 6 hours, and unified reporting is required during peak power consumption. Through the dynamic adjustment API, you can set the expected data reporting time and DRX cycle (there is a JSON interface, and users can adjust the expected data reporting time and DRX cycle as needed, for example, you need to adjust the data reporting time of a certain sensor to 6 o'clock and the DRX cycle to 24 hours), delete the original cycle, and allocate it according to the expected data reporting time.

[0069] Step S102: Sensor first access

[0070] Since the sensor obtains DRX when it is connected, DRX is not sent when the sensor is first connected, and routing is established when the sensor is first connected.

[0071] Step S103: Sensor access for the second time

[0072] When the sensor is connected for the second time, DRX configuration is performed. DRX cycle = expected data reporting time - next first packet time - current data reporting time - LoRa module initialization time;

[0073] The next first packet time = the last packet time + the default DRX cycle + the LoRa module initialization time;

[0074] If the next expected data reporting time is less than the next first packet time, it means that the current sensor data reporting time is abnormal (caused by manual triggering or other abnormalities), then the next expected data reporting time is used for calculation.

[0075] Step S104: Subsequent sensor access

[0076] When the sensor is connected for the third time, the difference between the expected data reporting time and the current data reporting time is determined and recorded as the offset value. The calculation formula is: offset value = expected data reporting time - current data reporting time;

[0077] DRX is calculated according to the offset value, and the calculation formula is: DRX cycle = (next expected data reporting time - current tail packet time - last DRX cycle - LoRa module initialization time) - current data reporting time + LoRa module initialization time + offset value.

[0078] Since DRX is effective every other cycle, it is necessary to calculate the information of two cycles for dynamic adjustment. After dynamic adjustment, the sensor data reporting time should be before or after the expected data reporting time, thereby ensuring the availability and stability of DRX scheduling.

[0079] Step S105: Sensor reports abnormality and performs initialization

[0080] If the difference between the sensor data reporting time and the expected data reporting time exceeds the abnormal factor (the abnormal factor is a parameter, for example, if it is configured as 0.1, the fluctuation range of DRX for 24 hours is 2.4 hours) multiplied by DRX, the sensor DRX adjustment logic is considered abnormal, and the number of reports needs to be set to 1, which is considered to be the first report, and the default DRX is issued. Re-adjust the sensor DRX.

[0081] It should be noted that, although the operations of the method of the present invention are described in a specific order in the above embodiments and the accompanying drawings, this does not require or imply that the operations must be performed in the specific order, or that all the operations shown must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps.

[0082] In order to explain more clearly the above method for quickly generating functional configuration based on the new metropolitan area network topology, a specific embodiment is used for illustration below. However, it should be noted that this embodiment is only for better illustrating the present invention and does not constitute an improper limitation on the present invention.

[0083] Example:

[0084] The following is a brief description of the DRX setup process using a partial discharge sensor:

[0085] 1. The default DRX cycle of the partial discharge sensor is 12 hours, and the data reporting time of sensor A is set to 0:00-0:04 and 12:00-12:04 every day.

[0086] 2. Sensor A is connected to the aggregation and edge gateway for the first time, and the route is established. The gateway sends the default DRX cycle of 12 hours to the aggregation gateway.

[0087] 3. Sensor A accesses the gateway for the second time and obtains the default DRX cycle on the aggregation. After sending data, it goes into sleep mode according to the received DRX cycle. The program dynamically calculates the next DRX cycle and sends it according to parameters such as data reporting time, default initialization time, and expected data reporting time.

[0088] 4. After the sleep is completed, the sensor is started to access the gateway for the third time. According to parameters such as the actual data reporting time and the expected data reporting time, it is determined whether there is a delay or early sending, and the DRX cycle is dynamically adjusted to ensure that the reporting time is close to the expected time.

[0089] Based on the same inventive concept, the present invention also proposes a DRX automatic configuration device based on LoRa. The implementation of the device can refer to the implementation of the above method, and the repeated parts will not be repeated. The term "module" used below can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceived.

[0090] Figure 2 Schematic diagram of the structure of the DRX automatic configuration device based on LoRa of the present invention. Figure 2 As shown, the device comprises:

[0091] The time allocation module 101 is used to initialize the sensor DRX; the details are as follows:

[0092] During initialization, the data reporting time of the sensors is sorted according to the expected data reporting time;

[0093] Divide a day into time windows according to the length of the time window and the number of sensors reporting data at the same time;

[0094] The time window is set according to the DRX cycle pre-configured by the sensor.

[0095] The dynamic adjustment module 102 is used to dynamically adjust the DRX of the sensor through the dynamic adjustment API; establish a route when the sensor is first connected, and send a default DRX; perform DRX configuration when the sensor is connected for the second time; when the sensor is subsequently connected, determine the difference between the expected data reporting time and the current data reporting time, record it as an offset value, and calculate DRX according to the offset value; the details are as follows:

[0096] Dynamically adjust the sensor DRX through the dynamic adjustment API;

[0097] When the sensor is first connected, a route is established and a default DRX is issued;

[0098] When the sensor is connected for the second time, DRX configuration is performed. DRX cycle = expected data reporting time - next first packet time - current data reporting time - LoRa module initialization time;

[0099] The next first packet time = the last packet time + the default DRX cycle + the LoRa module initialization time;

[0100] If the next expected data reporting time is less than the next first packet time, the next expected data reporting time is used for calculation;

[0101] When the sensor is subsequently connected, the difference between the expected data reporting time and the current reporting time is determined and recorded as the offset value. The calculation formula is: offset value = expected data reporting time - current data reporting time;

[0102] DRX is calculated according to the offset value, and the calculation formula is: DRX cycle = (next expected data reporting time - current tail packet time - last DRX cycle - LoRa module initialization time) - current data reporting time + LoRa module initialization time + offset value.

[0103] The abnormality reporting module 103 is used to initialize the abnormality reported by the sensor; the details are as follows:

[0104] If the difference between the sensor’s data reporting time and the expected data reporting time exceeds the abnormal factor multiplied by the DRX cycle, the sensor’s DRX adjustment logic is considered abnormal;

[0105] Set the sensor reporting times to 1, consider it as the first reporting, and send the default DRX cycle;

[0106] Re-adjust the sensor DRX.

[0107] It should be noted that although several modules of the LoRa-based DRX automatic configuration device are mentioned in the above detailed description, this division is only exemplary and not mandatory. In fact, according to an embodiment of the present invention, the features and functions of two or more modules described above can be concretized in one module. Conversely, the features and functions of one module described above can be further divided into multiple modules for concretization.

[0108] Based on the above invention concept, Figure 3 As shown, the present invention also proposes a computer device 200, including a memory 210, a processor 220, and a computer program 230 stored in the memory 210 and executable on the processor 220. When the processor 220 executes the computer program 230, the aforementioned LoRa-based DRX automatic configuration method is implemented.

[0109] Based on the aforementioned inventive concept, the present invention also proposes a computer-readable storage medium, which stores a computer program for executing the aforementioned LoRa-based DRX automatic configuration method.

[0110] The DRX automatic configuration method and device based on LoRa proposed in the present invention dynamically adjust DRX for each access of the LoRa470MHz Internet of Things sensor, which is more flexible than fixed DRX. By dynamically adjusting DRX, it is possible to prevent sensors from reporting at the same time, resulting in data not being sent. The data reporting time and the expected data reporting time can be dynamically adjusted.

[0111] The professional terms involved in the above technical solution are explained as follows:

[0112] DRX: Discontinuous Receive.

[0113] LORA: LoRa stands for Long Range Radio, a linear frequency modulation spread spectrum modulation technology.

[0114] NB: Narrow Band Internet of Things (NB-IoT).

[0115] GIS: Power GIS is a comprehensive information system for production management that connects power equipment, substations, transmission and distribution networks, power users and power loads of power companies to form power informatization.

[0116] Although the spirit and principle of the present invention have been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the disclosed specific embodiments, and the division of various aspects does not mean that the features in these aspects cannot be combined to benefit, and such division is only for the convenience of expression. The present invention is intended to cover various modifications and equivalent arrangements contained in the spirit and scope of the attached claims.

[0117] Regarding the limitation of the protection scope of the present invention, those skilled in the art should understand that, based on the technical solution of the present invention, various modifications or variations that can be made by those skilled in the art without creative work are still within the protection scope of the present invention.

Claims

1. A DRX automatic configuration method based on LoRa, characterized in that: The method includes: Sensor DRX initialization; Dynamically adjust sensor DRX through dynamic adjustment API; When the sensor is first connected, a route is established and a default DRX is issued; When the sensor is connected for the second time, DRX configuration is performed, including: When the sensor is connected for the second time, DRX configuration is performed. DRX cycle = expected data reporting time - next first packet time - current data reporting time - LoRa module initialization time; The next first packet time = the last packet time + the default DRX cycle + the LoRa module initialization time; If the next expected data reporting time is less than the next first packet time, the next expected data reporting time is used for calculation; When the sensor is subsequently connected, the difference between the expected data reporting time and the current data reporting time is determined and recorded as the offset value. The DRX is calculated based on the offset value, including: When the sensor is subsequently connected, the difference between the expected data reporting time and the current reporting time is determined and recorded as the offset value. The calculation formula is: offset value = expected data reporting time - current data reporting time; Calculate DRX according to the offset value. The calculation formula is: DRX cycle = (next expected data reporting time - current tail packet time - last DRX cycle - LoRa module initialization time) - current data reporting time + LoRa module initialization time + offset value; The sensor reports an abnormality and is initialized.

2. The DRX automatic configuration method based on LoRa according to claim 1, characterized in that: Sensor DRX initialization, including: During initialization, the data reporting time of the sensors is sorted according to the expected data reporting time; Divide a day into time windows according to the length of the time window and the number of sensors reporting data at the same time; The time window is set according to the DRX cycle pre-configured by the sensor.

3. The LoRa-based DRX automatic configuration method according to claim 1, characterized in that: The sensor reports an abnormality for initialization, including: If the difference between the sensor’s data reporting time and the expected data reporting time exceeds the abnormal factor multiplied by the DRX cycle, the sensor’s DRX adjustment logic is considered abnormal; Set the sensor reporting times to 1, consider it as the first reporting, and send the default DRX cycle; Re-adjust the sensor DRX.

4. A DRX automatic configuration device based on LoRa, characterized in that: The device includes: A time allocation module, used to initialize the sensor DRX; Dynamic adjustment module, used to dynamically adjust the sensor DRX through the dynamic adjustment API; establish routing when the sensor is first connected, and send the default DRX; perform DRX configuration when the sensor is connected for the second time, including: perform DRX configuration when the sensor is connected for the second time, DRX cycle = expected data reporting time - next first packet time - current data reporting time - LoRa module initialization time; where the next first packet time = last packet time + default DRX cycle + LoRa module initialization time; if the next expected data reporting time is less than the next first packet time, the next expected data reporting time is used for calculation ; When the sensor is subsequently connected, the difference between the expected data reporting time and the current data reporting time is determined, recorded as the offset value, and DRX is calculated according to the offset value, including: when the sensor is subsequently connected, the difference between the expected data reporting time and the current reporting time is determined, recorded as the offset value, and the calculation formula is: offset value = expected data reporting time - current data reporting time; DRX is calculated according to the offset value, and the calculation formula is: DRX cycle = (next expected data reporting time - current tail packet time - last DRX cycle - LoRa module initialization time) - current data reporting time + LoRa module initialization time + offset value; The abnormality reporting module is used to initialize the abnormality reported by the sensor.

5. The LoRa-based DRX automatic configuration device according to claim 4, characterized in that: Sensor DRX initialization, including: During initialization, the data reporting time of the sensors is sorted according to the expected data reporting time; Divide a day into time windows according to the length of the time window and the number of sensors reporting data at the same time; The time window is set according to the DRX cycle pre-configured by the sensor.

6. The LoRa-based DRX automatic configuration device according to claim 4, characterized in that: The sensor reports an abnormality for initialization, including: If the difference between the sensor’s data reporting time and the expected data reporting time exceeds the abnormal factor multiplied by the DRX cycle, the sensor’s DRX adjustment logic is considered abnormal; Set the sensor reporting times to 1, consider it as the first reporting, and send the default DRX cycle; Re-adjust the sensor DRX.

7. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 1 to 3 is implemented.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program for executing the method according to any one of claims 1 to 3.

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