KR102338931B1 - IoT device auto control system and method thereof - Google Patents

Abstract

The present invention provides a data storage unit that collects state information of a plurality of IoT devices connected to an IoT gateway in real time, and determines whether to autonomously control the IoT device by analyzing the state information of the IoT devices stored in the data storage unit and a determination unit that activates the autonomous control function when it is determined whether autonomous control is performed, and a battery level or network sensitivity of the IoT device is recognized when the autonomous control function is activated through the determination unit according to a preset data transmission and sensor collection cycle A control unit for setting an operation state and controlling the operation of the IoT device, and a data transmission unit for collecting sensor data of the IoT device according to the operation state set through the control unit, and transmitting the collected sensor data to a server characterized.

Description

IoT device autonomous control system and autonomous control method using same

The present invention relates to an IoT device autonomous control system and an autonomous control method using the same, and more particularly, to manage resources and states operating in various ultra-small IoT operating systems, and have a monitoring function to support optimal state autonomy of IoT devices It relates to a system and method for managing a control function.

Due to the advancement of industrial technology and the rapid development of information and communication technology, the distribution of mobile terminals capable of wireless communication such as smartphones and tablet PCs is spreading. The era of wireless Internet access has arrived.

In addition, with the development of sensor technology and the change of the IT environment called digital convergence, all information and communication technologies are convergence into one device or service. According to these changes, various types of communication networks such as wired and wireless communication networks and broadcasting communication networks are being connected into one, and various types of things with embedded chips and sensors are connected to the Internet to produce information and provide information to users. (Internet of Things) technology is rapidly developing.

In general, IoT technology is an intelligent technology or service that enables people, devices, spaces, and data to be connected to each other through a network and has the ability to exchange data between things as well as people and things, and to communicate with each other anytime, anywhere. means

These IoT technologies are applied not only to existing information devices such as smartphones, tablet PCs, and desktop PCs, but also to various fields such as clothing, work tools, and daily necessities. is increasing to

Accordingly, the importance of an identification system for distinguishing a plurality of IoT devices on a communication network is being emphasized, and in particular, interest in a management system for managing a plurality of IoT devices is increasing.

Korean Patent Laid-Open Patent No. 10-2018-0091996 provides a unique identification system including production information and disposal information to a plurality of IoT devices to ensure uniqueness with other IoT devices, and an IoT device that has been used at the same time It relates to an IoT device having an identification system that suppresses the generation of discarded IoT devices and promotes recycling or reuse by processing them based on the production and disposal information, and an IoT device integrated management system using the same.

Korean Patent Registration No. 10-1819422 discloses a step of receiving an optical signal from a first device or generating an optical signal to the first device, measuring an optical signal sharing time based on the optical signal, and based on the optical signal sharing time A method for managing an IoT device in a cloud service, comprising the steps of generating a first session key, receiving cipher text from a first device, and decrypting the cipher text using the first session key, and an apparatus using the same will be.

Korean Patent Publication No. 10-2018-0091996 (2018.08.17) Korean Registered Patent No. 10-1819422 (2018.01.10)

An embodiment of the present invention provides an IoT device autonomous control system that monitors state information such as a power profile or power consumption of an ultra-small IoT device in real time and accordingly minimizes battery usage of the IoT device, and an autonomous control method using the same. .

An embodiment of the present invention enables the collection of the latest sensor information by maximally increasing the number of moments when data cannot be collected as the autonomous control function of the IoT device is activated, and sensor information can be collected even in an area where the network signal strength is unstable. An object of the present invention is to provide an IoT device autonomous control system and an autonomous control method using the same.

In embodiments, the IoT device autonomous control system includes a data storage unit that collects state information of a plurality of IoT devices connected to an IoT gateway in real time, and a data storage unit that analyzes the state information of the IoT devices stored in the data storage unit to determine the IoT A determination unit that determines whether to control the device autonomously and activates the autonomous control function when it is determined whether the autonomous control is performed, and when the autonomous control function is activated through the determination unit, preset data by recognizing the battery level or network sensitivity of the IoT device A control unit that sets an operation state according to transmission and sensor collection cycle and controls the operation of the IoT device, and sensor data of the IoT device is collected according to the operation state set through the control unit, and the collected sensor data is transmitted to a server It characterized in that it includes a data transmission unit.

The IoT device includes a microcontroller unit (MCU), a network device, and a sensor device, and the MCU, the network device, and the sensor device are characterized in that it is possible to change and set an operating state of a run mode or a low-power standby mode. .

The data storage unit includes the basic data of the power profile built on the basis of the specification manual and the measured data provided by the manufacturer of the IoT device, and the power consumption analysis data built on the basis of the power consumption for the communication and sensor processing module characterized in that

The determination unit may activate the autonomous control function by calling an Iw_on_auto control function that outputs the control value of the autonomous control function.

Among the embodiments, the method for autonomous control of an IoT device includes: monitoring status information of a plurality of IoT devices connected to an IoT gateway in real time; analyzing status information of the IoT devices to determine whether to autonomously control the IoT device; , Activating the autonomous control function when it is determined whether autonomous control is performed It is characterized in that it includes.

When the battery level of the IoT device is detected below a predetermined level, stopping the operation according to a predetermined network cycle and sensor information collection cycle and waiting in a low power mode; The method further includes transmitting data to the server after collecting the latest sensor information by changing to the run mode state every cycle.

When the network signal strength of the IoT device is detected to be below a certain dB, the operation according to a preset network cycle and sensor information collection cycle is stopped, the latest sensor information is immediately collected, and data is continuously transmitted to the server a certain number of times. do.

The IoT device includes a microcontroller unit (MCU), a network device, and a sensor device, wherein the MCU, the network device, and the sensor device are always on standby for network, always collecting sensor data, periodic network communication, periodically collecting sensor data, and when an interrupt occurs. It is characterized in that it can be changed and set to the operating state of the run mode or low-power standby mode by applying the optimal operation technology for various cases such as network data processing or sensor data collection when an interrupt occurs.

The disclosed technology may have the following effects. However, this does not mean that a specific embodiment should include all of the following effects or only the following effects, so the scope of the disclosed technology should not be construed as being limited thereby.

An IoT device autonomous control system and an autonomous control method using the same according to an embodiment of the present invention provide an effect of monitoring state information such as a power profile or power consumption of an ultra-small IoT device in real time, and thus minimizing battery usage of the IoT device can do.

The IoT device autonomous control system and the autonomous control method using the same according to an embodiment of the present invention can collect the latest sensor information by maximally increasing the moment when data cannot be collected as the autonomous control function is activated, and the network signal strength It can provide the effect of collecting sensor information even in unstable areas.

1 is a schematic diagram illustrating a connection relationship of a plurality of IoT devices according to an embodiment of the present invention.
2 is a block diagram briefly explaining an IoT device autonomous control system according to an embodiment of the present invention.
3 to 7 are exemplary views illustrating IoT device optimal operation techniques for each situation.
8 is a flowchart illustrating a method for autonomously controlling an IoT device according to an embodiment of the present invention.
9 is a flowchart illustrating a method for autonomously controlling an IoT device according to an embodiment of the present invention.

Since the description of the present invention is merely an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiment described in the text. That is, since the embodiment may have various changes and may have various forms, it should be understood that the scope of the present invention includes equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all of them or only such effects, it should not be understood that the scope of the present invention is limited thereby.

On the other hand, the meaning of the terms described in the present application should be understood as follows.

Terms such as “first” and “second” are for distinguishing one component from another, and the scope of rights should not be limited by these terms. For example, a first component may be termed a second component, and similarly, a second component may also be termed a first component.

When a component is referred to as being “connected to” another component, it may be directly connected to the other component, but it should be understood that other components may exist in between. On the other hand, when it is mentioned that a certain element is "directly connected" to another element, it should be understood that the other element does not exist in the middle. On the other hand, other expressions describing the relationship between elements, that is, "between" and "between" or "neighboring to" and "directly adjacent to", etc., should be interpreted similarly.

The singular expression is to be understood to include the plural expression unless the context clearly dictates otherwise, and terms such as "comprises" or "have" refer to the embodied feature, number, step, action, component, part or these It is intended to indicate that a combination exists, and it should be understood that it does not preclude the possibility of the existence or addition of one or more other features or numbers, steps, operations, components, parts, or combinations thereof.

In each step, identification numbers (eg, a, b, c, etc.) are used for convenience of description, and identification numbers do not describe the order of each step, and each step clearly indicates a specific order in context. Unless otherwise specified, it may occur in a different order from the specified order. That is, each step may occur in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Terms defined in general used in the dictionary should be interpreted as having the meaning consistent with the context of the related art, and cannot be interpreted as having an ideal or excessively formal meaning unless explicitly defined in the present application.

1 is a schematic diagram illustrating a connection relationship of a plurality of IoT devices according to an embodiment of the present invention.

Referring to FIG. 1 , a plurality of IoT devices 110 are connected to the gateway 100, and the IoT devices are service targets based on IoT technology such as a remote automatic control system, a home network system, and a car remote control system. It can mean any smart device or sensor that becomes available. More specifically, the sensor may include a sensor that detects environmental factors such as a temperature sensor, a humidity sensor, a carbon dioxide sensor, an infrared sensor, and a detection sensor.

2 is a block diagram briefly explaining an IoT device autonomous control system according to an embodiment of the present invention.

Referring to FIG. 2 , the autonomous control system 200 of the IoT device includes a data storage unit 210 , a determination unit 220 , a control unit 230 , and a data transmission unit 240 .

First, the data storage unit 210 collects state information of a plurality of IoT devices connected to the IoT gateway in real time.

The state of the IoT device may be monitored in real time through the state information of the IoT device stored in the data storage unit 210 , and this may be visualized. In IoT device resource management, CPU, RAM, network, processor, system information, task status, sensor status, etc. can be monitored and visually expressed.

The data storage unit 210 stores basic data of a power profile built based on a specification manual and actual measurement data provided by a manufacturer of an IoT device. This becomes the basic data necessary for the optimal operation of low power. Power Profile provides structured document types such as .json or .xml to support overall functional improvement of profile data loading, parsing, and structured data management. Power profile management can be managed by providing functions such as a profile loading unit, a profile analysis and data management unit, and a data interworking API unit.

In addition, the data storage unit 210 stores the power consumption analysis data constructed based on the power consumption for the communication and sensor processing module.

Power consumption measurement provides the ability to collect power data to minimize and manage the battery usage of IoT devices. The power consumption analysis data is processed based on the data of the data link API provided by the power profile management module. It manages data through various APIs provided by the power management algorithm for battery consumption by operating time for each communication, sensor, and processing module.

The determination unit 220 analyzes the state information of the IoT devices stored in the data storage unit 210 to determine whether to autonomously control the IoT device, and an Iw_on_auto control function that outputs a control value of the autonomous control function when determining whether to autonomously control the IoT device Activate the autonomous control function by calling

The control unit 230 recognizes the battery level or network sensitivity of the IoT device for which the autonomous control function is activated through the determination unit 220 . It infers the battery level through the ADC (Analog-Digital Converter) function, outputs it to the serial terminal, and configures a circuit that changes the battery analog voltage to a digital value that can be controlled by the MCU. For visual battery voltage monitoring, an interface circuit with a PC serial terminal can be configured to infer the battery level value.

Based on the inferred battery level data, the battery consumption according to the operating time for each module is inferred, and the battery consumption data for each IoT device is used as the basic data of the power profile.

Then, an operation state according to a preset data transmission and sensor collection cycle is set, and an operation of the IoT device is controlled. Here, the IoT device includes a micro controller unit (MCU), a network device, and a sensor device. In addition, the MCU, the network device, and the sensor device can be set to be changed to an operating state of a run mode or a low-power standby mode.

A power operation method according to the IoT device includes a run mode or a low-power standby mode, and more specifically, includes a run mode, a light sleep mode, and a deep sleep mode.

The run mode is a normal operation, in which all clocks are activated, and power consumption varies according to frequency. Light sleep mode is the default low-power mode used in most applications, there is no CPU or peripheral clock, uses a 32Hz crystal, and consumes 50-100nA of power. In addition, deep sleep mode is used for applications with a short sleep time-to-runtime ratio or a long sleep time. There is no CPU or peripheral clock, a 32Hz crystal is used, and the power consumption is less than 50nA.

Low-power standby mode is a power operation API for low-power support according to application and task operation conditions. When there is no task to be processed by the MCU, it enters sleep mode to increase battery life.

In addition, in order to increase the lifespan of the battery, it is possible to apply a minimization technique through software code and modeling by analyzing the power consumption induced pattern.

The power consumption induced patterns include the following cases.

First, the repeated use of the expression causes power consumption accumulated as many times as the number of times the partial expression is repeated. The minimization technique of repetitive arithmetic expressions can be substituted by pre-calculating the result value of the formula as shown in <Table 1> below.

<Table 1>

Using a recursive function structure has a high function call cost and may cause a stack overflow. The method of minimizing the use of the recursive function structure can be processed by converting the recursive function structure into a loop that can perform the same function as shown in <Table 2> below.

<Table 2>

Using multiple index variables in a loop causes power consumption due to unnecessary index declarations. The method of minimizing the use of multiple index variables in a loop can process multiple indexes by a single index as shown in Table 3 below.

<Table 3>

The use of the loop double structure causes power consumption by increasing the number of iterations. The method of minimizing the use of the double structure of the loop can be processed by simplifying the for statement of the double structure into a single for statement as shown in <Table 4> below.

<Table 4>

The use of global variables in loops causes repeated shared memory accesses, resulting in power consumption. The method of minimizing the use of global variables in the loop can be processed by replacing the global variable in the loop with a local variable as shown in <Table 5> below.

<Table 5>

Unnecessary code in the program is loaded into memory even if it is not executed and causes power consumption. Unnecessary code use in the program can be handled by removing the unused code in the program as shown in <Table 6> below.

<Table 6>

The data transmitter 240 transmits the collected sensor data to the server when sensor data of the IoT device is collected according to an operation state set through the controller 230 . It ignores the preset network cycle or sensor collection information, stops the operation and waits, and when a condition below a certain reference value is detected, the latest sensor information is collected and data is transmitted to the server.

At this time, the last measured value can be collected by maximally increasing the number of moments when data can no longer be collected due to the low battery through autonomous control. In addition, through autonomous control, sensor information can be collected in areas with unstable network signal strength.

3 to 7 are exemplary views illustrating IoT device optimal operation techniques for each situation.

First, the optimal operation technology can be divided into scenarios of constant network standby, constant sensor data collection, periodic network communication, periodic sensor data collection, network data processing when an interrupt occurs, and sensor data collection when an interrupt occurs.

Normal network standby is a standby state of a network device that can communicate with a server or a gateway at any time, and constant sensor data collection refers to a state of a sensor device that can be collected whenever continuous sensor data is requested.

In periodic network communication, when communicating with a server or a gateway at a certain period, the network device waits in a low power state and then changes to the run mode state every set period, and network data communication is possible. Periodic sensor data collection is a state in which, when there is a request for sensor collection at a certain period, the sensor device waits in a low power state and is changed to a run mode state every set period to collect sensor data.

In addition, when an interrupt occurs, network data processing maintains the low power state of the network device, and when an interrupt occurs when data is received or there is data to be transmitted, it is changed to the run mode and data processing is possible. If it waits in a low-power state and exceeds a predetermined threshold, an interrupt is generated and the state changes to the run mode, indicating a state in which sensor data can be collected. Here, the interrupt is applicable to a device supporting in_air wake-up and is applicable to a device supporting wake-up by setting a threshold value.

The support power profile management and optimal operation technology of the IoT device will be described in detail with reference to FIGS. 3 to 7 as follows.

3 shows a scenario of always-on network communication and always-on sensor data collection.

The MCU 310 , the network device 320 , and the sensor device 330 are always set to the run mode and the standby state, and are always in a state where processing is possible when a network device data communication request or a sensor device collection request is made.

4 shows a scenario of continuous network communication and periodic sensor data collection.

The MCU 410 and the network device 420 are always in a run mode and a standby state, and are always in a state in which data processing is possible when a network device data communication request is made.

The sensor device 330 waits in the low power state, then changes to the run mode every predetermined period, and enters the low power mode after collecting sensor data.

5 shows a scenario of network data processing and periodic sensor data collection when an interrupt occurs.

The MCU 510 is always in the run mode and standby state, and the network device 520 waits in the low power state, and then enters the run mode when data is received and an interrupt occurs or data transmission is requested, and then enters the low power mode after data processing.

The sensor device 530 waits in the low power state, and then changes to the run mode every predetermined period and enters the low power mode after collecting sensor data.

6 shows a periodic network communication and periodic sensor data collection scenario.

The MCU 610 waits in the low power state, then changes to the run mode according to a predetermined cycle of the network device and the sensor device, and enters the low power mode again after data processing. RTC (Real Time Clock) alarm wakeup is used according to a set period.

The network device 620 waits in the low power state, and then changes to the run mode every predetermined period and enters the low power mode after processing network data. The sensor device 630 waits in the low power state, and then changes to the run mode every predetermined period and enters the low power mode after collecting sensor data.

7 shows a scenario for collecting sensor data when periodic network communication and interrupts occur.

The MCU 710 waits in the low power state, and then changes to the run mode according to a predetermined network device communication cycle or to the run mode by an interrupt of the sensor device, and enters the low power mode again after data processing. RTC (Real Time Clock) alarm wakeup is used according to a set period.

The network device 720 waits in the low power state, and then changes to the run mode every predetermined period and enters the low power mode after processing network data.

When the sensor device 730 waits in a low power state and exceeds a predetermined threshold value, an interrupt occurs and changes to a run mode state, and after collecting sensor data, the sensor device 730 enters a low power mode. Applicable to devices that support wake up by setting a threshold.

8 is a flowchart illustrating a method for autonomously controlling an IoT device according to an embodiment of the present invention.

Referring to FIG. 8 , status information of a plurality of IoT devices connected to the IoT gateway is monitored in real time. Next, it is determined whether the IoT device is autonomously controlled by analyzing the state information of the IoT devices, and when the autonomous control is determined, the autonomous control function is activated (step S800 ). The autonomous control function can be activated by calling the Iw_on_auto control function that outputs the control value of the autonomous control function.

When the battery level of the IoT device is sensed and is below a predetermined reference value (step S810), the operation according to the preset data transmission and sensor collection cycle is stopped (step S820).

For example, if the battery level is 12%, it ignores the previously set network cycle or sensor collection information, and waits without any action. In this case, the reference value of the battery level may be changed to a desired level.

Thereafter, when a battery level of 10% or less is detected (step S830), the latest sensor information is collected and data is transmitted to the server (step S840).

9 is a flowchart illustrating a method for autonomously controlling an IoT device according to an embodiment of the present invention.

Referring to FIG. 9 , status information of a plurality of IoT devices connected to the IoT gateway is monitored in real time. Then, it is determined whether the IoT device is autonomously controlled by analyzing the state information of the IoT devices, and when the autonomous control is determined, the autonomous control function is activated (step S900 ). The autonomous control function can be activated by calling the Iw_on_auto control function that outputs the control value of the autonomous control function.

The network signal strength of the IoT device is measured, and when it is below a predetermined reference value (step S910), the operation according to the preset data transmission and sensor collection cycle is stopped (step S920).

For example, if a state in which the network signal strength is 20 dB or less is recognized, the previously set network cycle or sensor collection information is ignored, and the system waits without any action. In this case, the predetermined network signal strength can be communicated, but the value can be changed and set to a dangerous signal strength.

Thereafter, the latest sensor information is collected and data is continuously transmitted to the server a predetermined number of times (step S930). For example, sensor information can be collected three times in a row and transmitted to the server, and with this function, sensor information can be collected in an area where the network signal strength is unstable.

Although the above has been described with reference to the preferred embodiments of the present application, those skilled in the art can variously modify the present application within the scope without departing from the spirit and scope of the present invention described in the claims below. and may be changed.

100 : gateway
110: IoT device
200: IoT device autonomous control system
210: data storage unit
220: judgment unit
230: control unit
240: data transmission unit
310, 410, 510, 610, 710 : MCU
320, 420, 520, 620, 720: network device
330, 430, 530, 630, 730: sensor device

Claims (8)

a data storage unit that collects state information of a plurality of IoT devices connected to the IoT gateway in real time;
a determination unit that analyzes state information of the IoT devices stored in the data storage unit to determine whether to autonomously control the IoT device, and activates an autonomous control function when it is determined whether to perform autonomous control;
a controller configured to recognize a battery level or network sensitivity of the IoT device when the autonomous control function is activated through the determination unit, set an operation state according to a preset data transmission and sensor collection cycle, and control the operation of the IoT device; and
The sensor data of the IoT device is collected according to the operation state set through the control unit, and the data transmitter transmits the collected sensor data to the server.
including,
The IoT device includes a micro controller unit (MCU), a network device, and a sensor device, and the MCU, the network device, and the sensor device are changeable and settable to an operating state of a run mode or a low-power standby mode, and In order to increase the lifespan, the software code according to the analysis of the power consumption induced pattern and the minimization technique through modeling are applied, and the optimal operation technique defined by the scenario for each situation is applied,
The power consumption inducing pattern includes the use of repetitive arithmetic expressions, the use of a recursive function structure, the use of multiple index variables in the loop, the use of the double structure of the loop, the use of global variables in the loop, and the use of unnecessary code in the program,
As for the minimization technique, in the case of using the repetitive arithmetic expression, the method of pre-calculating and replacing the result value of the expression among the arithmetic expressions is applied. The conversion processing method is applied, in the case of using multiple index variables in the loop, a method of processing multiple indexes by a single index is applied, and in the case of using the double structure of the loop, the for statement of the double structure is converted into a single for The method of processing by simplifying the statement is applied. In the case of using a global variable in the loop, the method of processing by replacing the global variable in the loop with a local variable is applied. In the case of using unnecessary code in the program, code not used in the program The method of processing by removing
The optimal operation technology includes scenarios of constant network standby, constant sensor data collection, periodic network communication, periodic sensor data collection, network data processing when an interrupt occurs, and sensor data collection when an interrupt occurs,
The regular network standby is a network device standby state in which communication with a server or a gateway is always possible, the regular sensor data collection is a sensor device state in which continuous sensor data request is always possible, and the periodic network communication is a server in a certain period. In the case of communication with the gateway, the network device waits in a low power state and then changes to the run mode state every set period and network data communication is possible. The device waits in the low power state and then changes to the run mode at every set period to enable sensor data collection. When the interrupt occurs, the network data processing maintains the network device low power state. If there is, it is changed to the run mode and data processing is possible, and when the interrupt occurs, the sensor device waits in a low power state and when it exceeds a predetermined threshold, an interrupt occurs and changes to the run mode state and collects sensor data possible state, wherein the interrupt is applicable to a device supporting in_air wake-up and is applicable to a device supporting wake-up by setting a threshold value,
The data storage unit monitors and visualizes the state of the IoT device in real time through the state information of the IoT device, and the basic data of the power profile built on the basis of the specification manual and actual measurement data provided by the manufacturer of the IoT device; It stores power consumption analysis data built on the basis of power consumption for communication and sensor processing modules,
The determination unit activates the autonomous control function by calling an Iw_on_autocontrol function that outputs the control value of the autonomous control function,
The data transmitter ignores the preset network cycle or sensor collection information, stops the operation, waits, and collects the latest sensor information and transmits the data to the server when a condition below a predetermined reference value is detected. control system. delete delete delete delete delete delete delete

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