KR102239317B1 - Simultaneous connection avoidance system and method for IoT device group - Google Patents

Abstract

The present invention avoids the simultaneous access situation so as not to exceed the limit of accessibility that can be accommodated by a wired/wireless gateway or a wireless repeater when a plurality of clustered IoT devices that are not supplied with constant power attempt simultaneous access to a wired/wireless gateway or a wireless repeater. The present invention relates to a system and method for avoiding simultaneous access of an Internet of Things (IoT) device group so that information can be stably transmitted to a server through a wired/wireless gateway or a wireless repeater by efficiently operating limited power resources of an IoT device. The method of avoiding simultaneous access of the Internet of Things (IoT) device group according to the present invention includes the step of monitoring the constant power supplied to the IoT device by the IoT device (S10), and interrupting the constant power from the IoT device when the constant power is cut off as a result of the monitoring. Recognizing and generating a random number (S20), and using a connection sequence number based on the generated random number, the operation unit may include determining a wake-up time of the IoT device (S30). In addition, the step of switching each IoT device of the IoT device group to a sleep mode (S40), a step of performing a wake-up by the computing unit of the IoT device according to the wake-up time (S50), and The IoT device of the corresponding access sequence may perform communication access to a wired/wireless gateway or a wireless repeater using a wake-up time, and transmit data (S60).

Description

Simultaneous connection avoidance system and method for IoT device group}

The present invention relates to a system and method for avoiding simultaneous access of an Internet of Things (IoT) device group, wherein a wired/wireless gateway or a wired/wireless gateway or a case where a plurality of clustered IoT devices that are not supplied with constant power attempt simultaneous access to a wired/wireless gateway or a wireless repeater. A group of Internet of Things (IoT) devices that allow each IoT device to efficiently operate limited power resources and deliver information reliably to servers by avoiding simultaneous access situations so as not to exceed the limit of accessibility that can be accommodated by wireless repeaters. It relates to a simultaneous access avoidance system and method.

In general, an IoT device that is supplied with constant power or has its own power (battery, capacitive capacitor, etc.) periodically transmits information obtained from sensors, etc. to the server, or transmits information to the server when obtaining information in a specific state.

At this time, the IoT device group consisting of a plurality of IoT (Internet of Things) devices having the same or similar functions has an effect on the IoT device group due to an earthquake or a type of simultaneous interruption of the supplied constant power. In order to generate information and transmit the generated information, there may be a situation in which information must be transmitted by simultaneously accessing a wired/wireless gateway or a wireless repeater.

In this way, when a situation in which a group of IoT devices must simultaneously connect to a wired/wireless gateway or wireless repeater occurs, the wired/wireless gateway or wireless repeater reaches the limit of the number of accessible IoT devices and processes the connection as much as the limit to accept the connection. It is done. At this time, the IoT device above the access limit value fails to access the wired/wireless gateway or wireless repeater, and thus repeatedly attempts to access the wired/wireless gateway or wireless repeater.

In this case, the IoT device with limited power resources due to the power cut off at all times does not wait for the wired/wireless gateway or wireless repeater to reach an accessible state after repeatedly attempting to connect to the wired/wireless gateway or wireless repeater, and exhausts all of its own power. This leads to the power-off state.

In addition, if the IoT device is turned off and cannot be connected to a wired/wireless gateway or wireless repeater, it cannot perform its function until power for normal operation is secured, and thus cannot deliver the information to be transmitted. Loss may also occur. In addition, the connection to the wired/wireless gateway or wireless repeater cannot be performed until power is supplied to the IoT device, so that the server cannot determine whether the IoT device is in a faulty state or a power-off state.

Republic of Korea Patent Publication No. 10-2017-0101680 (published on September 06, 2017)

Therefore, the technical problem to be achieved by the present invention is to solve the conventional shortcomings, and by efficiently utilizing their own power possessed by individual Internet of Things (IoT) devices having limited power resources due to the constant power cut off, it can be used as a wired/wireless gateway or a wireless repeater. Its purpose is to reliably deliver acquired data by avoiding simultaneous access.

A system for avoiding simultaneous access of an Internet of Things (IoT) device group according to an aspect of the present invention for achieving this technical problem includes an IoT device group consisting of a plurality of IoT devices. In addition, the IoT device may include a measurement unit, a power unit, a power control unit, an operation unit, a connection management control unit, a storage unit, and a communication unit.

The measuring unit is connected to the electric equipment to measure electrical safety data of the electric equipment. The power unit supplies power to the IoT device so that the measured electrical safety data can be transmitted to a wired/wireless gateway or a wireless repeater when the supply of power to the IoT device is cut off at all times.

In addition, the power control unit controls charging and discharging of the power unit, monitors the constant power supplied to the IoT device, and supplies the charged power of the power unit to the IoT device when the constant power is cut off. When the supply of power to the IoT device is cut off at all times, the operation unit generates a random number for determining the communication access order of the IoT device to a wired/wireless gateway or a wireless repeater. The communication unit transmits and receives data through a wired/wireless gateway or a wireless repeater.

In addition, the storage unit includes electrical safety data measured using the measurement unit, random number data generated by the calculation unit, information on the order and time required for connection to a wired/wireless gateway or wireless repeater, and sleep mode time and Stores wake-up time information.

In addition, the connection management control unit extracts the time required for the connection of the remaining wired/wireless gateway or wireless repeater when the IoT device fails to connect to the wired/wireless gateway or wireless repeater, and recalculates the access sequence number and the wake-up time based on this. Calculate and perform communication connection.

In addition, a method for avoiding simultaneous access of an Internet of Things (IoT) device group according to another aspect of the present invention includes the step of monitoring the constant power supplied to the IoT device by each IoT device in the IoT device group (S10), and the monitoring result constant power. When this is blocked, the operation unit determines the wake-up time of the IoT device using the step of generating a random number (S20) and a connection sequence based on the generated random number by recognizing the interruption of the constant power in the IoT device (S30). ) Can be included.

In addition, the step of switching each IoT device of the IoT device group to a sleep mode (S40), a step of performing a wake-up by the computing unit of the IoT device according to the wake-up time (S50), and The IoT device of the corresponding access sequence may perform communication access to a wired/wireless gateway or a wireless repeater using a wake-up time, and transmit data (S60).

As described above, the system and method for avoiding simultaneous access of an Internet of Things (IoT) device group according to the present invention is a wired/wireless gateway or a wireless repeater because the constant power of each IoT device in the IoT device group that monitors electrical safety is cut off. In the case of attempting to connect to the server, information is stably transmitted from the Internet of Things (IoT) device to the server through wired/wireless gateways or wireless repeaters by avoiding simultaneous access to prevent data transmission collisions and failures by efficiently utilizing limited power. There is an effect that can be delivered. In addition, there is an effect of securing electrical safety by increasing the reliability of the remote electrical safety monitoring device, collecting data in real time, and preventing loss of collected data.

1 is a block diagram showing a system for avoiding simultaneous access according to an embodiment of the present invention.
2 is a block diagram illustrating an IoT device according to an embodiment of the present invention.
3 is a diagram illustrating an operation unit according to an embodiment of the present invention.
4 and 5 are flowcharts illustrating a method of avoiding simultaneous access according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are assigned to similar parts throughout the specification.

Throughout the specification, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary. In addition, terms such as "...unit", "...group", and "...module" described in the specification mean a unit that processes at least one function or operation, which is implemented by hardware or software, or a combination of hardware and software. Can be.

Hereinafter, the present invention will be described in detail by describing a preferred embodiment of the present invention with reference to the accompanying drawings.

The same reference numerals shown in each drawing indicate the same members.

1 is a block diagram showing a system for avoiding simultaneous access according to an embodiment of the present invention, FIG. 2 is a block diagram showing an IoT device according to an embodiment of the present invention, and FIG. 3 is a calculation unit according to an embodiment of the present invention. It is a drawing showing.

The simultaneous access avoidance system 10 according to an embodiment of the present invention is a relay that relays a signal transmitted from the IoT device group 100 consisting of a plurality of IoT devices 110 and 120 and each IoT device 110 and 120 Device 200 may be included. Here, the relay device 200 may include a wired/wireless gateway 210 or a wireless repeater 220. In addition, the IoT device group 100 may include a plurality of IoT devices 110 and 120 having the same or similar functions, or having the same purpose.

In addition, each IoT device (110, 120) of the IoT device group 100 is connected to the corresponding electrical equipment (21, 22) to measure the electrical safety data of the electrical equipment (21, 22), IoT (Internet of Things), the measured electrical safety data may be transmitted to the server 300 through the wired/wireless gateway 210 or the wireless repeater 220.

In addition, the IoT devices 110 and 120 include a power supply unit 111, a power control unit 112, a measurement unit 113, an operation unit 114, a connection management control unit 115, a storage unit 116, and a communication unit 117. Includes. The power supply unit 111 may supply power to drive the IoT devices 110 and 120 when power is always cut off to the IoT devices 110 and 120.

Preferably, power is always supplied to each of the IoT devices 110 and 120 from the corresponding electrical facilities 21 and 22 to drive the IoT devices 110 and 120. However, if the IoT device group 100 is constantly powered off and the power is not supplied at all times, the measured electrical safety data may not be transmitted to the wired/wireless gateway 210 or the wireless repeater 220 and data loss may occur. .

To this end, the power supply unit 111 transmits the measured electrical safety data from the IoT devices 110 and 120 to the wired/wireless gateway 210 or the wireless repeater 220 when the power is cut off at all times. ) Can be supplied with power.

The power control unit 112 may control charging and discharging of the power unit 111. That is, the power control unit 112 charges the power supply unit 111 using constant power and monitors the constant power to supply the power charged in the power unit 111 to the IoT devices 110 and 120 when the power is cut off at all times. I can.

The measuring unit 113 may be connected to the corresponding electrical equipment 21 and 22 to measure electrical safety data of the electrical equipment 21 and 22. The operation unit 114 receives the monitoring result of the constant power from the power control unit 112 and generates a random number for determining the access order of the wired/wireless gateway 210 or the wireless repeater 220 when the constant power is cut off.

Here, the range of the access sequence number Cn may be the number of IoT devices 110 and 120 constituting the IoT device group 100. That is, the calculation unit 114 randomly generates a random number within a range of 1 to n, which is the number of the total IoT devices 110 and 120.

In this way, the access order is determined using the random number generated by the calculation unit 114. Therefore, when the number of IoT devices 110 and 120 constituting the IoT device group 100 is n, the probability of overlapping the access order in the IoT device group 100 is 1/n, which is a wired/wireless gateway 210 or a wireless repeater. In (220), it can be seen as the range in which simultaneous access processing is possible.

In addition, the calculation unit 114 may include a random number generation module 1141, a timer module 1142, and a calculation module 1143. The random number generation module 1141 generates a random number in order to determine an order in which the IoT devices 110 and 120 access the wired/wireless gateway 210 or the wireless repeater 220. The timer module 1142 uses the connection order of the IoT devices 110 and 120, a preset connection distribution interval time, and the wired/wireless gateway 210 or the wireless repeater 220 connection maintenance time. Determine the sleep mode time and wake up time. In addition, the calculation module 1143 may calculate a time required to access the wired/wireless gateway 210 or the wireless repeater 220 of each of the IoT devices 110 and 120.

As an example according to the present invention, an IoT device group 100 consisting of n IoT devices 110 and 120 will be described as an example. When the power to the IoT device group 100 is cut off at all times, the transmission time is reduced so that all the IoT devices 110 and 120 of the IoT device group 100 do not simultaneously transmit data to the wired/wireless gateway 210 or the wireless repeater 220. It is preferable to perform fixed dispersion.

At this time, the transmission distribution interval for distributing the transmission time of the data is the minimum access distribution interval time (t1) according to the simultaneous access allowance limit of the wired/wireless gateway 210 or the wireless repeater 220 and the density of the IoT devices 110 and 120 It should have more than one gap. In addition, the power supply unit 111 having limited power in each IoT device 110 and 120 guarantees the operation of the IoT devices 110 and 120 for a maximum time of nx t1, and each IoT device of the IoT device group 100 ( It is preferable that the 110 and 120 operate to avoid simultaneous access to the wired/wireless gateway 210 or the wireless repeater 220.

The time required to access the wired/wireless gateway 210 or the wireless repeater 220 of the IoT device group 100 (Tt) may be extracted by the following [Equation 1].

[Equation 1]

Tt = n x (t1 + t2)

Here, Tt is the time required to access the wired/wireless gateway 210 or the wireless repeater 220 of the IoT device group 100, n is the number of IoT devices 110, 120, and t1 is a preset connection distribution interval time. , t2 is a preset wired/wireless gateway 210 or wireless repeater 220 connection maintenance time of each of the IoT devices 110 and 120.

That is, the individual IoT devices 110 and 120 of the IoT device group 100 are limited by the power supply unit 111 during the maximum Tt (time required to access the wired/wireless gateway 210 or the wireless repeater 220 of the IoT device group 100). It should be possible to maintain communication available state by using power resource.

In addition, the operation unit 114 switches the IoT devices 110 and 120 to the sleep mode using the sleep mode time and wake up time determined through the timer module 1142 , Communication access is performed to the wired/wireless gateway 210 or the wireless repeater 220 by performing a wake-up according to the set access order (Cn).

The wake-up time (Tw) of the IoT devices 110 and 120 may be extracted by the following [Equation 2].

[Equation 2]

Tw = Cn x (t1 + t2)

Here, Tw is the wake-up time of the individual IoT devices 110 and 120, and Cn is the access order of the corresponding IoT devices 110 and 120. In addition, t1 is the connection distribution interval time, and t2 is the connection maintenance time of the wired/wireless gateway 210 or the wireless repeater 220 of each of the IoT devices 110 and 120.

The connection management control unit 115 is the remaining wired/wireless gateway 210 or the wireless repeater 220 connection time (Ttm) when the IoT devices 110 and 120 fail to connect to the wired/wireless gateway 210 or the wireless repeater 220. ) Is extracted, and based on this, the connection sequence (Cn) and the wake-up time are recalculated to perform a communication connection.

If the corresponding IoT device (110, 120) fails to connect to the wired/wireless gateway 210 or the wireless repeater 220 after wake-up, the remaining wired/wireless gateway 210 or the wireless repeater 220 connection time required ( Ttm) can be extracted by the following [Equation 3].

[Equation 3]

Ttm = Tt-(Sleep time)

Here, Ttm is the time required to access the wired/wireless gateway 210 or wireless repeater 220 remaining after wake-up, and Tt is the wired/wireless gateway 210 or wireless repeater 220 of the IoT device group 100 It is the required time, and (Sleep time) is the required sleep mode time of the IoT devices 110 and 120.

The storage unit 116 includes electrical safety data measured using the measurement unit 113, random number data generated by the operation unit 114, the connection order and connection time information of the corresponding IoT devices 110 and 120, and sleep mode. (Sleep mode) Time and wake-up time information can be saved.

The communication unit 117 may transmit and receive data to and from the wired/wireless gateway 210 or the wireless repeater 220 under the control of the operation unit 114. That is, the communication unit 117 may transmit the measured electrical safety data to the wired/wireless gateway 210 or the wireless repeater 220 and receive a signal from the wired/wireless gateway 210 or the wireless repeater 220.

The operation unit 114 selectively transmits data to the wired/wireless gateway 210 or the wireless repeater 220 by controlling the communication unit 117. That is, the calculation unit 114 periodically transmits the electrical safety data measured using the communication unit 117 to the wired/wireless gateway 210 or the wireless repeater 220 when the constant power is supplied to the IoT devices 110 and 120 And, if the power is cut off at all times, communication is connected to the wired/wireless gateway 210 or the wireless repeater 220 according to the wake-up time based on the access sequence number and connection time information of the corresponding IoT device (110, 120). To transmit the data.

As described above, in the simultaneous access avoidance system 10 according to the present invention, a plurality of clustered IoT devices 110 and 120 are connected to a wired/wireless gateway 210 or wirelessly in a state in which power is not always supplied to the IoT devices 110 and 120. By performing simultaneous access to the repeater 220 and avoiding the simultaneous access situation of the IoT devices 110 and 120 so as not to exceed the accessible limit that can be accommodated by the wired/wireless gateway 210 or the wireless repeater 220, individual IoT devices ( There is an effect that the 110 and 120 can efficiently operate limited power resources to ensure access to the wired/wireless gateway 210 or the wireless repeater 220, and stably transmit the measured information.

4 and 5 are flowcharts illustrating a method of avoiding simultaneous access according to an embodiment of the present invention. The simultaneous access avoidance method according to an embodiment of the present invention includes the step of monitoring the constant power supplied to the IoT devices 110 and 120 by the IoT devices 110 and 120 (S10), and when the constant power is cut off as a result of the monitoring, the IoT device At (110, 120), the operation unit 114 wakes up the IoT device (110, 120) by using the step of generating a random number (S20) and a connection sequence based on the generated random number. It may include determining the time (S30).

In addition, the step of switching each IoT device 110, 120 of the IoT device group 100 to a sleep mode (S40), the corresponding IoT device 110, 120 according to the wake-up time. The operation unit 114 of the step of performing a wake-up (S50) and the IoT devices 110 and 120 of the corresponding access order perform communication access to the wired/wireless gateway 210 or the wireless repeater 220 using the wake-up time. And, it may include a step (S60) of transmitting the data.

Here, the wake-up time may be determined using [Equation 2].

In addition, when the IoT devices 110 and 120 fail to connect to the wired/wireless gateway 210 or the wireless repeater 220 in the step of performing the communication connection and transmitting data (S60), the corresponding IoT device 110, 120) may further include a step (S70) of repeatedly performing steps (S20) to (S60).

That is, when the IoT devices 110 and 120 fail to connect to the wired/wireless gateway 210 or the wireless repeater 220 after a wake-up, the wired/wireless gateway 210 or the wireless repeater remaining within limited power resources ( 220) Based on the time required for connection (Ttm), steps (S20) to (S60) are repeatedly performed to recalculate the access sequence number, and the communication connection may be performed again.

The repeating step (S70) is a step (S21) of regenerating a random number by the corresponding IoT device (110, 120) that has failed the communication connection, and a random number from which the calculation unit 114 of the corresponding IoT device (110, 120) is regenerated. It may include a step (S31) of determining the wake-up time again by using.

In addition, based on the wake-up time determined again in steps (S41) and (S31) in which the remaining IoT devices 110 and 120 of the IoT device group 100 are converted to sleep mode again. Step (S51) of re-performing a wake-up by the IoT devices 110 and 120 of the access sequence and the IoT devices 110 and 120 of the access sequence using the wake-up time as a wired/wireless gateway (210) or re-performing the communication connection to the wireless repeater 220, and transmitting data (S61).

In this way, the simultaneous access avoidance method according to the present invention uses limited power as efficiently as possible in a situation where the constant power is cut off to the IoT devices 110 and 120, and thus the individual IoT devices 110 and 120 of the IoT device group 100 By avoiding simultaneous access to the wired/wireless gateway 210 or the wireless repeater 220, the possibility of communication connection failure of the individual IoT devices 110 and 120 is reduced, and communication access and information transfer are important, such as a remote electrical safety monitoring device. Operational stability of the devices 110 and 120 may be increased.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and is easily changed from the embodiments of the present invention by those of ordinary skill in the art to which the present invention pertains. Includes all changes to the extent deemed acceptable.

10: simultaneous access avoidance system 20: electrical equipment
21: first electrical equipment 22: second electrical equipment
100: IoT device group 110: first IoT device
111: power unit 112: power control unit
113: measuring unit 114: calculating unit
1141: random number generation module 1142: timer module
1143: operation module 115: connection management control unit
116: storage unit 117: communication unit
120: second IoT device 200: relay device
210: wired/wireless gateway 220: wireless repeater
300: server

Claims (6)

An object that avoids simultaneous access situations in which the IoT device simultaneously connects to a wired/wireless gateway or wireless repeater so that data can be transmitted to the server within the limited power resources of the IoT device in case the constant power is cut off to the IoT device group consisting of multiple IoT devices. In the simultaneous access avoidance system of the Internet (IoT) device group,
The IoT device is
A measuring unit connected to the electric equipment to measure electrical safety data of the electric equipment;
In order to ensure that the measured electrical safety data can be transmitted to a wired/wireless gateway or wireless repeater without loss of power when the supply of power to the IoT device is cut off at all times, communication is possible during the time required to access the wired/wireless gateway or wireless repeater of the IoT device group. A power supply unit configured to maintain a state to supply power to an IoT device;
A power control unit that controls charging and discharging of the power unit, monitors constant power supplied to the IoT device, and supplies charged power from the power unit to the IoT device when the constant power is cut off;
1 to n based on the number (n) of individual IoT devices in the IoT device group to determine the communication access order from each IoT device to a wired/wireless gateway or wireless repeater when the supply of power to the IoT device is cut off at all times. Generates a random number within the range of, determines the access order of the IoT device according to the generated random number, switches IoT devices that make up the IoT device group to sleep mode, and wakes up according to the access order. An operation unit for performing a communication connection to a wired/wireless gateway or a wireless repeater by performing (Wake-Up); And
A system for avoiding simultaneous access of an Internet of Things (IoT) device group, comprising a communication unit for transmitting and receiving data with a wired/wireless gateway or a wireless repeater based on the Internet of Things (IoT).
The method of claim 1,
The IoT device group is a system for avoiding simultaneous access of an Internet of Things (IoT) device group, characterized in that the group of IoT devices includes a plurality of IoT devices having the same or similar functions, or having the same purpose.
delete The method of claim 1,
The operation unit calculates the sleep mode time and wake-up time of the corresponding IoT device using the access sequence number, the connection distribution interval time of the IoT device set in advance, and the connection maintenance time of the wired/wireless gateway or wireless repeater. Simultaneous access avoidance system of an Internet of Things (IoT) device group, characterized in that.

Simultaneous access by simultaneously connecting IoT devices to wired/wireless gateways or wireless repeaters so that data can be transmitted to wired/wireless gateways or wireless repeaters within the limited power resources of individual IoT devices in case the constant power is cut off to an IoT device group consisting of multiple IoT devices. In the method of avoiding simultaneous access of a group of Internet of Things (IoT) devices that avoid a situation,
Monitoring the constant power supplied to the IoT device by an individual IoT device (S10);
Step of generating a random number within the range of 1 to n based on the number (n) of individual IoT devices that make up the IoT device group and recognizes the interruption of the constant power from the IoT device when the constant power is cut off as a result of monitoring (S20) ;
Determining, by the computing unit of the IoT device, a wake-up time of the corresponding IoT device using a connection sequence number based on the generated random number (S30);
Switching each IoT device of the IoT device group to a sleep mode (S40);
Performing a wake-up by a computing unit of the IoT device according to the wake-up time (S50); And
Including a step (S60) of the IoT device of the corresponding access order performing communication access to a wired/wireless gateway or a wireless repeater using a wake-up time, and transmitting data,
The power supply unit having limited power in each IoT device is used to ensure that the measured electrical safety data is not lost when the supply of power to the IoT device is cut off at all times and can be transmitted to a wired/wireless gateway or wireless repeater. A method of avoiding simultaneous access of an Internet of Things (IoT) device group, comprising supplying power to an IoT device by being configured to maintain a communication enabled state for a time required to access a gateway or a wireless repeater.
The method of claim 5,
After performing the communication connection and transmitting data (S60)
If the IoT device fails to connect to the wired/wireless gateway or the wireless repeater, regenerating a random number by a corresponding IoT device that has failed the communication connection (S21);
Re-determining a wake-up time by using the random number generated again by the computing unit of the IoT device (S31);
A step (S41) of failing the communication connection of the IoT device group and the remaining IoT device is converted to a sleep mode (S41);
Re-performing a wake-up according to the access sequence by the IoT device of the corresponding access sequence based on the determined wake-up time (S51); And
The method of avoiding simultaneous access of an Internet of Things (IoT) device group further comprising: re-performing communication connection to a wired/wireless gateway or a wireless repeater by the IoT device of the corresponding access order using the wake-up time, and transmitting data (S61). .

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