KR101614941B1 - Method for pairing a first terminal with at lesat one terminal selected among second terminals by using rssi information, terminal and computer-readable recording media using the same - Google Patents

Method for pairing a first terminal with at lesat one terminal selected among second terminals by using rssi information, terminal and computer-readable recording media using the same Download PDF

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KR101614941B1
KR101614941B1 KR1020150032805A KR20150032805A KR101614941B1 KR 101614941 B1 KR101614941 B1 KR 101614941B1 KR 1020150032805 A KR1020150032805 A KR 1020150032805A KR 20150032805 A KR20150032805 A KR 20150032805A KR 101614941 B1 KR101614941 B1 KR 101614941B1
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terminal
category
rssi
paired
pairing
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KR1020150032805A
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Korean (ko)
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이승엽
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(주)하이디어 솔루션즈
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention relates to a method for selecting and pairing at least one terminal to be paired with a first terminal from a plurality of second terminals using RSSI information. According to the present invention, (a) the first terminal refers to the identifier information and the RSSI information for each of the plurality of second terminals entering the pairing mode, and transmits each of the plurality of second terminals to the first category to the nth (B) at least one second terminal belonging to the k-th category, k being an integer of 1 or more and less than or equal to n, with reference to the RSSI information of at least one second terminal, Determining whether there is a terminal to be paired with the first terminal among the second terminals of the k-th category; and (c) determining whether there exists a terminal capable of being paired with the first terminal among at least one second terminal belonging to the k- The method comprising: pairing a terminal determined to be paired with the first terminal and the first terminal.

Description

TECHNICAL FIELD [0001] The present invention relates to a method, a terminal, and a computer readable recording medium for selecting and pairing at least one terminal to be paired with a first terminal using a RSSI information from among a plurality of second terminals. SECOND TERMINALS BY USING RSSI INFORMATION, TERMINAL AND COMPUTER-READABLE RECORDING MEDIA USING THE SAME}

The present invention relates to a method, a first terminal and a computer-readable recording medium for selecting and pairing at least one terminal to be paired with a first terminal using a plurality of second terminals using RSSI information, When it is detected that the first terminal and the plurality of second terminals enter the pairing mode, the first terminal acquires identifier information and RSSI information for each of the plurality of second terminals, Wherein the second terminal is configured to classify each of the plurality of second terminals into one of the first category to the nth category with reference to the identifier information for each of the plurality of second terminals and to refer to the RSSI information of at least one second terminal belonging to the kth category, Determines whether there is a terminal to be paired with the first terminal among at least one second terminal belonging to the kth category, A method of pairing a terminal determined to be paired with the first terminal and a terminal determined to be paired with the first terminal among terminals of a second terminal, The present invention relates to a recording medium.

With the advancement of IT technology, the Internet of Things (IoT) has come to connect things in various fields such as healthcare, smart home, smart cars and watches as well as household appliances and electronic devices. Through networking between objects, you can get the information you need anytime and anywhere, and use the information you have found useful. For example, by monitoring the heart rate of a person and automatically sending the monitored data to the central control center, you will be able to see the patient's health even remotely.

In order to construct the Internet environment of objects, first, a network must be connected between objects. In general, pairing must be performed in order to connect a short-range wireless network between a user terminal and a communication terminal of an object. At this time, if there are a plurality of communication terminals providing similar information, the user terminal can determine which of the plurality of communication terminals is to be paired, and one of various pairing methods can be used for this purpose. Among them, a pairing technique using RSSI information has been introduced. According to Korean Unexamined Patent Publication No. 2009-0047144, for example, an RSSI value is acquired from devices capable of Bluetooth communication and is paired with a device having the largest RSSI among acquired RSSI Is performed. However, when pairing is performed for a terminal having the largest RSSI value, there is a problem that unwanted pairing may occur. For example, when there is a sensor node to be paired with the base unit terminal and there is a sensor node to communicate with, there is a large deviation of the RSSI value depending on the type of sensor node, manufacturer, etc. Therefore, Problems could have been caused.

Accordingly, the present inventor proposes a technique capable of preventing unwanted pairing while utilizing RSSI information.

The present invention has been made to solve the above-mentioned problems.

Another object of the present invention is to perform pairing using an RSSI value, and to improve the accuracy of pairing by classifying categories to be paired.

The specific configuration of the present invention for achieving the object of the present invention as described above and realizing the characteristic effects of the present invention described below is as follows.

According to an aspect of the present invention, there is provided a method for selecting and pairing at least one terminal to be paired with a first terminal from a plurality of second terminals using received signal strength indication (RSSI) information, the method comprising: (B) classifying each of the plurality of second terminals into one of a first category to an n-th category with reference to identifier information and RSSI information for each of a plurality of second terminals entering the pairing mode, K < th > category, wherein k is an integer equal to or greater than 1 and equal to or less than n, the RSSI information of at least one second terminal belonging to the k < Determining whether there is a terminal to be paired with the first terminal among the at least one second terminal belonging to the k-th category; and (c) And pairing the terminal determined to be paired with the first terminal and the first terminal, if determined.

According to another aspect of the present invention, there is provided a terminal for selecting and pairing at least one terminal to be paired with a first terminal using a RSSI (Received Signal Strength Indication) information, from among a plurality of second terminals, A category determination unit for classifying each of the plurality of second terminals into any one of a first category to an nth category with reference to identifier information and RSSI information for each of the plurality of second terminals, determining whether there is a terminal to be paired with the first terminal among at least one second terminal belonging to the k-th category, with reference to the RSSI information of at least one second terminal belonging to the k- And a terminal capable of being paired with the first terminal among the at least one second terminal belonging to the k-th category exists If decided, the terminal including the first terminal and the second pair perform to pair the determined terminal that can be paired with the first terminal portion is provided.

In addition, a computer readable recording medium for recording a computer program for executing the method of the present invention is further provided.

According to the present invention, there is an effect that the accuracy of pairing can be increased while using the RSSI value.

1 is a flowchart illustrating a method for selecting and pairing at least one terminal to be paired with a first terminal from a plurality of second terminals using RSSI information according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating a configuration of a terminal for pairing using RSSI information according to an embodiment of the present invention. Referring to FIG.
FIG. 3 is a diagram illustrating exemplary RSSI values of a second terminal in each category to be paired with a first terminal according to an exemplary embodiment of the present invention. Referring to FIG.
FIG. 4 is a diagram showing a comparison between the standard RSSI distribution of each category and the actual RSSI value corresponding to the category of FIG. 3 in magnitude comparison.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

For reference, in a terminal that performs pairing, the types of terminals may vary. The first terminal may be a base unit that performs duty communication, a beacon frame that performs beacon communication, or a master that performs Bluetooth communication. Also, the second terminal may be a sensor node that performs duty-ratio communication, a mobile node that performs beacon communication, or a slave that performs Bluetooth communication. However, for convenience of explanation, in an embodiment of the present invention, it is assumed that the first terminal is a base unit and the second terminal is a sensor node for convenience of explanation.

FIG. 1 is a flowchart illustrating a method for selecting and pairing at least one terminal to be paired with a first terminal from a plurality of second terminals using RSSI information according to an embodiment of the present invention.

Referring to FIG. 1, when it is detected that the first terminal and the at least one second terminal enter the pairing mode, the first terminal may acquire the identifier information and the RSSI information for each of the second terminals (S11) have.

A method for detecting the entry of the first terminal and the second terminal into the pairing mode includes generating a pairing mode entry signal when the first terminal and the second terminal are powered on, A method of detecting entry into a pairing mode, and a method of setting a pairing mode entry button in a first terminal and a second terminal to generate a pairing mode entering signal when the button is pressed, thereby causing a first terminal and a second terminal to enter a pairing mode But it is not limited to this.

Next, the plurality of second terminals may be classified into any one of the first category to the n-th category (S12) with reference to the identifier information for each of the plurality of second terminals.

Herein, n categories may be classified according to at least one of a classification criterion according to a function of a terminal and a classification criterion according to a manufacturer of the terminal. For example, if the sensor node is classified based on the function of the terminal, the sensor node may be classified into n categories, such as a fall sensor category, a gas sensor category, and a motion sensor category.

Next, with reference to the RSSI information of at least one second terminal belonging to the kth category (k is an integer equal to or greater than 1 and equal to or less than n), the first terminal of at least one second terminal belonging to the kth category It is determined that there is a terminal to be paired (S13).

Specifically, in order to determine whether there is a terminal to be paired with the first terminal among at least one second terminal belonging to the k-th category, the RSSI information of at least one second terminal belonging to the k-th category and the RSSI information A predetermined period of the standard RSSI distribution corresponding to the k < th > category may be compared to determine whether there is a terminal to be paired with the first terminal. Here, a predetermined interval (so-called valid interval) of the standard RSSI distribution corresponding to the k-th category recorded in the predetermined RSSI database is a period for comparing the RSSI value of the second terminal with the RSSI value of the second terminal, will be. For example, if the RSSI value included in the RSSI information of the sensor node belonging to the gas sensor category is x dB, and the RSSI value of the sensor node belonging to the gas sensor category has a predetermined interval (that is, a valid interval, The sensor node can be determined as a terminal to be paired with the base unit if the RSSI value x dB of the sensor node belongs to the interval from y dB to z dB, If the RSSI value x dB of the node does not belong to the interval from y dB to z dB, the sensor node can be determined as a terminal that is not paired with the base unit. This will be described in more detail below with reference to FIGS. 3 and 4. FIG.

The RSSI values of the second terminals belonging to different categories may be compared with a predetermined interval of the standard RSSI distribution to determine whether there is a terminal to be paired with the first terminal within the corresponding category.

If it is determined that only one terminal to be paired with the first terminal exists among the second terminals belonging to the kth category, the second terminal belonging to the kth category can be directly determined as a terminal to be paired with the first terminal If it is determined that there are a plurality of second terminals belonging to the k-th category, a terminal having the largest RSSI value among the second terminals belonging to the k-th category may be determined as a terminal to be paired with the first terminal . Of course, the RSSI value of the terminal having the largest RSSI value among the second terminals belonging to the kth category may be determined as a terminal to be paired with the first terminal when the RSSI value is included in a predetermined predetermined interval of the standard RSSI distribution.

Then, the second terminal determined to be able to be paired with the first terminal can be paired with the first terminal (S14).

Here, the identifier information and the RSSI information of the terminal determined to be paired with the first terminal are stored in the storage device of the first terminal, the third terminal or the other server, and information of the terminal paired with the first terminal is stored in the database It can be constructed as If a situation occurs that a communication network such as an error occurs in the first terminal, is repaired, the first terminal is replaced with a new terminal, the first terminal is powered off and then turned on again, or the like , It is possible to automatically re-pair a plurality of terminals connected to the existing network with reference to the pairing data stored in a predetermined storage device.

FIG. 2 is a block diagram illustrating a configuration of a terminal for pairing using RSSI information according to an embodiment of the present invention. The terminal 100 includes a pairing mode entry determiner 120, a category determiner 130, An object determining unit 140, a pairing performing unit 150, a communication unit 160, and a control unit 110. [

The pairing determining unit 140, the pairing performing unit 150, the communication unit 160, and the control unit 110 may be configured to determine whether or not the pairing mode is selected by the pairing mode entry determining unit 120, the category determining unit 130, At least some of which may be program modules that are included in or communicate with the terminal 100. 2, a pairing mode entry determiner 120, a category determiner 130, a pairing determining unit 140, a pairing performing unit 150, a communication unit 160, and a controller 110 are connected to the terminal 100, As shown in FIG. At least some of these program modules may be included in the terminal 100 in the form of an operating system, application program modules, and other program modules, and may be physically stored on various known memory devices. Also, at least some of these program modules may be stored in a remote storage device capable of communicating with the terminal 100. Such program modules include, but are not limited to, routines, subroutines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types as described below in accordance with the present invention.

Specifically, the pairing mode entry determiner 120 may detect that a plurality of second terminals have entered the pairing mode. If the predetermined button of the second terminal is operated to match a predetermined criterion, May obtain the RSSI information of the second terminal and may determine whether the second terminal enters the pairing mode with reference to the obtained RSSI information. For example, when the user presses a predetermined button of the second terminal for a predetermined time or longer (in the case of meeting the predetermined criteria), the first terminal acquires the RSSI information of the second terminal, If the information is included in a predetermined intensity range (so-called validity interval), it can be determined that the user enters the pairing mode. Of course, it should be noted that the method of determining a pairing mode entry is one example.

On the other hand, the category determination unit 130 determines whether or not each of the plurality of second terminals is the first category to the n-th category, with reference to the identifier information and RSSI information of each of the plurality of second terminals entering the pairing mode It can be classified as one. At this time, the identifier information acquired by the category determination unit 130 may include at least a part of the address, category information, and manufacturer information of the second terminal.

Specifically, the category determination unit 130 can classify the plurality of second terminals into one of the first category to the n-th category, with reference to the category information contained in the identifier information of the plurality of second terminals There will be.

The pairing determination unit 140 refers to the RSSI information of at least one second terminal belonging to the k-th category, which is one of the first to n-th categories, and determines at least one It is possible to determine whether there is a terminal to be paired with the first terminal among the second terminals.

If it is determined that there is a terminal capable of being paired with a first terminal of at least one second terminal belonging to the kth category, the pairing performing unit 150 may be capable of pairing the first terminal with the first terminal And can pair with the determined terminal.

The communication unit 160 according to an exemplary embodiment of the present invention includes a pairing mode entry determination unit 120, a category determination unit 130, a pairing determination unit 140, and a pairing execution unit 150 It is possible to perform a function of communicating with an external device.

The controller 110 according to an exemplary embodiment of the present invention includes a pairing mode entering determiner 120, a category determining unit 130, a pairing determining unit 140, a pairing performing unit 150, 160 of the mobile terminal. That is, the control unit 110 according to the present invention controls the flow of data between the components of the terminal 100 to / from the outside or the terminal 100, so that the pairing mode entry determiner 120, the category determiner 130, The target determining unit 140, the pairing performing unit 150, and the communication unit 160, respectively.

Meanwhile, the terminal 100 described in FIG. 2 may mean a first terminal that is paired with a second terminal, but is not necessarily limited thereto. The terminal 100 may communicate with a first terminal and / Or a separate terminal (so-called third terminal) for supporting pairing between the second terminals. Here, the third terminal may be a concept including a server.

FIG. 3 is a diagram illustrating exemplary RSSI values of a second terminal in each category to be paired with a first terminal according to an exemplary embodiment of the present invention. Referring to FIG.

Referring to FIG. 3, when in the pairing mode for pairing the first terminal 310 and the second terminal 320 of the k-th category in the "Jung Hee's house", unfortunately, Shows a state in which the terminal 311 is in a pairing mode for pairing the second terminal 321 of the kth category and the second terminal 322 of the (k + 1) category.

In this case, the first terminal 310 can directly or indirectly obtain the RSSI value of the neighboring second terminals. The RSSI value obtained from the second terminal 320 of the k-th category is RSSI 1 , and the RSSI values obtained from the second terminal 321 as RSSI 2, the (k + 1) the RSSI value is obtained from the second terminal 322 of the category and that RSSI 3, RSSI 3> RSSI 1 > RSSI 2 . In this case, according to the conventional simple RSSI measurement pairing method, the first terminal 310 naturally transmits to the second terminal 322 of the (k + 1) -th category of the next house corresponding to the RSSI 3 having the highest RSSI value, It can be considered as a pairing object and pairing can be performed. However, the present invention can prevent such a malfunction, which will be described below with reference to FIG.

FIG. 4 is a diagram showing a comparison between the standard RSSI distribution of each category and the actual RSSI value corresponding to the category of FIG. 3 in magnitude comparison.

Referring to FIG. 4, it can be seen that the standard RSSI distribution of the (k + 1) category has a strength that is far greater than that of the standard RSSI distribution of the kth category, and that the degree of attenuation .

Despite also attenuated due to three of the (k + 1) the wall of the between the category of the second terminal 322. The first terminal attenuation and neighbor by 310 and the distance and the value of the RSSI 3 RSSI 1 and It can be seen that RSSI is larger than 2 . For reference, the x-axis in Fig. 4 is described as "distance ", but may more accurately be a concept that includes all of the factors that cause attenuation, such as distance and / or obstacle level.

However, the value of RSSI 3 is not only out of the valid period of the RSSI value of the kth category to which the first terminal 310 wants to pair, but may also be referred to as the above-mentioned identifier information The RSSI 3 value is a value for the sensor node belonging to the (k + 1) -th category, so that the RSSI value can be excluded from consideration of the RSSI value. On the other hand, the RSSI 1 of the second terminal 320 belonging to the k-th category and the RSSI 2 of the second terminal 321 belonging to the k-th category both belong to the k-th category and are included in the valid section, In this case, the second terminal 320 of the k-th category corresponding to RSSI 1 having a larger value can be determined as a pairing target.

3 and 4, it is assumed that the manufacturer is the same. However, as mentioned above, since the RSSI value may be different according to the manufacturer even though the sensor node of the same category is used, the category may be separately classified by the manufacturer to manage and compare the data separately Of course.

Finally, the classification of the category and the information of the second terminal belonging to the category may be updated by a predetermined server.

The embodiments of the present invention described above can be implemented in the form of program instructions that can be executed through various computer components and recorded on a computer-readable recording medium. The computer-readable recording medium may include program commands, data files, data structures, and the like, alone or in combination. The program instructions recorded on the computer-readable recording medium may be those specially designed and constructed for the present invention or may be those known and used by those skilled in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tape, optical recording media such as CD-ROMs and DVDs, magneto-optical media such as floptical disks, media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those generated by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware device may be configured to operate as one or more software modules for performing the processing according to the present invention, and vice versa.

110:
120: Pairing mode entry determination unit
130:
140: Pairing object determination unit
150:
160:

Claims (18)

A method for selecting and pairing at least one terminal to be paired with a first terminal from a plurality of second terminals using RSSI (Received Signal Strength Indication) information,
(a) the first terminal classifies each of the plurality of second terminals into one of the first category to the n-th category with reference to the identifier information and RSSI information of each of the plurality of second terminals entering the pairing mode ,
(b) a first k-th category, wherein k is an integer equal to or greater than 1 and equal to or less than n, with reference to the RSSI information of at least one second terminal belonging to the k-th category, Determining whether a terminal to be paired with the terminal exists, and
(c) if it is determined that there is a terminal capable of being paired with the first terminal among at least one second terminal belonging to the k-th category, the terminal determined to be able to pair with the first terminal ≪ / RTI >
Lt; / RTI >
The step (b)
When the RSSI information of a plurality of second terminals belonging to the k-th category is included in a predetermined interval centering on a threshold value for the k-th category, the RSSI information of the second Determining a terminal to be paired with the first terminal. delete delete The method according to claim 1,
The step (b)
If the second terminal belonging to the k-th category is included in one of the k-th categories, the RSSI information of the second terminal belonging to the k-th category is included within a predetermined interval centered on the threshold value for the k-th category recorded in the RSSI database, And determines a second terminal belonging to the k-th category as a terminal to be paired with the first terminal. The method according to claim 1,
In the step (a)
Wherein the first category to the n-th category are classified according to at least one of a classification criterion according to a function of the terminal and a classification criterion according to a manufacturer of the terminal. The method according to claim 1,
Before the step (a)
(a0) If the predetermined button of the second terminal is manipulated to match a predetermined criterion, the first terminal obtains the RSSI information of the second terminal, and the second terminal refers to the obtained RSSI information, ≪ / RTI > mode of operation. The method according to claim 1,
Wherein the classification of the category and the information of the second terminal belonging to the category are updated by a predetermined server. The method according to claim 1,
The step (c)
Determining whether there is a terminal to be paired with the first terminal from the first category to the n-th category. The method according to claim 1,
Wherein the first terminal is a base unit for performing directivity communication, and the second terminal is a sensor node for performing directivity communication. A terminal for selecting and pairing at least one terminal to be paired with a first terminal from among a plurality of second terminals using RSSI (Received Signal Strength Indication) information,
A category determination unit for classifying each of the plurality of second terminals into one of a first category to an nth category with reference to identifier information and RSSI information of each of the plurality of second terminals entering the pairing mode,
K < th > category, wherein k is an integer equal to or greater than 1 and equal to or less than n, the RSSI information of at least one second terminal belonging to the k < A pairing determination unit for determining whether there is a terminal to be
If it is determined that a terminal capable of being paired with the first terminal exists among at least one second terminal belonging to the kth category, the first terminal is paired with the terminal determined to be paired with the first terminal The pairing-
Lt; / RTI >
Wherein the pairing-
When the RSSI information of a plurality of second terminals belonging to the k-th category is included in a predetermined interval centering on a threshold value for the k-th category, the RSSI information of the second Wherein the terminal determines the terminal to be paired with the first terminal. delete delete 11. The method of claim 10,
Wherein the pairing-
If the second terminal belonging to the k-th category is included in one of the k-th categories, the RSSI information of the second terminal belonging to the k-th category is included within a predetermined interval centered on the threshold value for the k-th category recorded in the RSSI database, And determines a second terminal belonging to the k-th category as a terminal to be paired with the first terminal. 11. The method of claim 10,
The category determination unit may determine,
Wherein the first category to the n-th category are classified according to at least one of a classification criterion according to a function of the terminal and a classification criterion according to a manufacturer of the terminal. 11. The method of claim 10,
When the predetermined button of the second terminal is manipulated to conform to a predetermined criterion, the first terminal obtains the RSSI information of the second terminal, and the second terminal enters the pairing mode with reference to the obtained RSSI information And a pairing mode entry determining unit that determines whether or not the terminal has been connected to the terminal. 11. The method of claim 10,
Wherein the classification of the category and the information of the second terminal belonging to the category are updated by a predetermined server. 11. The method of claim 10,
Wherein the pairing-
And determines whether there is a terminal to be paired with the first terminal from the first category to the n-th category, respectively. 11. The method of claim 10,
Wherein the first terminal is a base unit that performs a duty communication and the second terminal is a sensor node that performs duty communication.
KR1020150032805A 2015-03-09 2015-03-09 Method for pairing a first terminal with at lesat one terminal selected among second terminals by using rssi information, terminal and computer-readable recording media using the same KR101614941B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113671118A (en) * 2021-08-02 2021-11-19 德尔格安全设备（中国）有限公司 Gas detection device and locking control method thereof
WO2024019330A1 (en) * 2022-07-22 2024-01-25 삼성전자주식회사 Device and method for controlling radio waves in bluetooth environment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113671118A (en) * 2021-08-02 2021-11-19 德尔格安全设备（中国）有限公司 Gas detection device and locking control method thereof
WO2024019330A1 (en) * 2022-07-22 2024-01-25 삼성전자주식회사 Device and method for controlling radio waves in bluetooth environment

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