KR102372906B1 - Image monitorimg device for notifying disaster situation using tvws band and operation method thereof - Google Patents

Abstract

The present invention relates to a video monitoring device for notifying users of a disaster situation using a TV white space (TVWS) band, which efficiently notifies users of occurrence of a disaster situation, and an operation method thereof. According to one embodiment of the present invention, a method for operating the video monitoring device for notifying users of a disaster situation using a TVWS band comprises the following steps: monitoring a disaster situation in an area where a video monitoring device is installed on the basis of video data captured in real-time; when information indicating a disaster situation is detected from the video data, generating a disaster detection message indicating that the disaster situation has been detected; receiving TVWS channel availability information on the basis of location information of the video monitoring device from a TVWS database managing TVWS channels, wherein the TVWS channel availability information includes information indicating whether each TVWS channel is available; and transmitting video data and a disaster detection message to a TVWS repeater through a TVWS communication module on the basis of the TVWS channel availability information.

Description

A video surveillance device that notifies a disaster situation using TVWS band and its operation method {IMAGE MONITORIMG DEVICE FOR NOTIFYING DISASTER SITUATION USING TVWS BAND AND OPERATION METHOD THEREOF}

Embodiments of the present disclosure relate to a video monitoring apparatus for notifying a disaster situation using a TVWS band and an operating method thereof.

Embodiments of the present disclosure relate to a video monitoring apparatus for transmitting data related to a disaster situation using a TVWS band, and an operating method thereof.

It is necessary to install a video surveillance system in order to monitor disaster situations in hiking trails and mountainous areas where there are few people. For example, video surveillance through a video surveillance system is implemented through a real-time video surveillance system such as a Closed Circuit Television (CCTV) system. In general, a real-time video surveillance system consists of a camera installed at the surveillance site, a communication module for video transmission, and a video server that stores and analyzes the received video. make it possible to check

In this way, image data and notification data collected from cameras installed in the field need to be transmitted through a communication network. Accordingly, the operation of the video surveillance system may involve communication costs, and when video data and notification data are transmitted using a short-distance wireless communication method, stable data quality is secured due to the influence of neighboring buildings, obstacles, frequency interference, etc. can be problematic. In addition, due to the limitation of the communication distance, a problem that a plurality of APs or relays must be additionally installed may occur.

On the other hand, as the domestic analog TV broadcasting service is terminated and converted to digital broadcasting, the use of an unlicensed TV white space (TVWS) that is not used is being activated. TVWS refers to an empty frequency band that is not used regionally to prevent interference between broadcasting stations among channels 14 to 51 (470 MHz to 698 MHz), which are the broadcasting bands of DTV. TVWS is being used in various ways as a channel to provide wireless Internet service to rural areas where wireless infrastructure is weak, or to transmit small-scale local information in palaces and museums. The frequency band of TVWS has strong propagation characteristics against surrounding obstacles compared to local area networks such as wireless LANs.

This TVWS can be used to solve the data transmission/reception problem of the video surveillance system. In the TVWS, since vacant channels are different for each region, vacant available channels can be used only in a small area to protect TV broadcasting. For example, channel 27 may be used as an available channel in the Gyeongsangnam-do region between Gyeonggi-do and Jeollabuk-do.

(001) Korean Patent Publication No. 10-2018-0066341 (2018.06.19) (002) Korean Patent Publication No. 10-2015-0008960 (2015.01.26)

Embodiments of the present disclosure may provide a video monitoring apparatus for transmitting data related to a disaster situation using a TVWS band and an operating method thereof.

Technical problems to be achieved in the embodiments are not limited to those mentioned above, and other technical problems not mentioned may be considered by those of ordinary skill in the art from various embodiments to be described below. can

According to embodiments, a method of operating a video surveillance apparatus for notifying a disaster situation using a TV white space (TVWS) band may include monitoring a disaster situation in an area where the video monitoring device is installed based on image data captured in real time. ; generating a disaster detection message indicating that a disaster situation has been detected when information indicating a disaster situation is detected from the image data; receiving TVWS channel availability information based on location information of a video surveillance device from a TVWS database managing TVWS channels, the TVWS channel availability information including information indicating whether TVWS channels are available for each TVWS channel; and transmitting the image data and the disaster detection message to the TVWS repeater through the TVWS communication module based on the TVWS channel availability information. In this case, the image data and the disaster detection message may be transmitted through TVWS channels having different channel identification information, respectively.

According to embodiments, the transmitting of the image data and the disaster detection message may include: calculating a channel interference degree of each of a plurality of TVWS available channels based on TVWS channel available information; determining an image transmission channel through which image data is transmitted and a message transmission channel through which a disaster detection message is transmitted based on the calculated degree of channel interference of each of the plurality of TVWS available channels; and transmitting image data through an image transmission channel and transmitting a disaster detection message through a message transmission channel. In this case, the channel interference degree of the video transmission channel may be smaller than the channel interference degree of the message transmission channel.

According to embodiments, when the TVWS channel availability information includes information indicating whether each N TVWS channels are available, and there are M adjacent TVWS areas adjacent to the TVWS area to which the video surveillance apparatus belongs, each of the plurality of TVWS available channels Calculating the channel interference degree may include calculating the channel interference degree I(k) of the k-th TVWS channel according to the following equation.

[Equation]

In the equation, n is identification information indicating the n-th TVWS channel from the TVWS channel corresponding to the lowest frequency band among the N TVWS channels, m is identification information indicating the m-th adjacent TVWS region among M adjacent TVWS regions, and USE (n) returns '0' if the nth TVWS channel is an available channel, '1' if the nth TVWS channel is already in use, and USE_m(k) is k in the mth TVWS area. Returns '0' if the th channel is an available channel, returns '1' if the kth channel is already in use in the mth TVWS area, and R_m uses the kth channel in the mth adjacent TVWS area. It can represent the distance between the TV band device and the video monitoring device that is being used.

According to embodiments, the image data may include a plurality of data packets determined in an order. In this case, the method includes: after transmitting the disaster detection message, receiving a response message to the disaster detection message from the TVWS repeater; and after the response message is received, transmitting at least a portion of a plurality of data packets included in the image data through a message transmission channel.

According to embodiments, a method includes, after transmitting the disaster detection message, receiving a response message to the disaster detection message from a TVWS repeater; and after the response message is received, additionally transmitting information indicating the carbon dioxide concentration, carbon monoxide concentration, fine dust concentration, and ultrafine dust concentration in the atmosphere through the message transmission channel.

According to embodiments, there is provided a video monitoring device for notifying a disaster situation using a TVWS band, comprising: a memory for storing instructions for operating the video monitoring device; processor; and a TVWS communication unit for transmitting and receiving data through a TVWS channel, wherein the processor monitors the disaster situation in the area where the video monitoring device is installed based on the video data captured in real time according to the instructions stored in the memory, and the disaster from the video data When information indicating a situation is detected, a disaster detection message indicating that a disaster situation has been detected is generated, and TVWS channel availability information is received from a TVWS database that manages TVWS channels based on location information of a video surveillance device, and TVWS channel availability Based on the information, the image data and the disaster detection message may be transmitted to the TVWS repeater through the TVWS communication unit. In this case, the image data and the disaster detection message may be characterized in that each channel identification information is transmitted through different TVWS channels.

According to embodiments, the video monitoring apparatus and method can effectively notify that a disaster situation has occurred.

According to embodiments, the video monitoring apparatus and method can more effectively transmit that a disaster situation has occurred by using a channel having a relatively small degree of channel interference.

According to embodiments, the video monitoring apparatus and method can efficiently transmit data related to a disaster situation by flexibly using the allocated available TVWS channel.

According to embodiments, the video monitoring apparatus and method may transmit additional information related to environment information through the allocated available TVWS channel to more efficiently utilize the allocated available TVWS channel.

Effects obtainable from the embodiments are not limited to the effects mentioned above, and other effects not mentioned are clearly derived and understood by those of ordinary skill in the art based on the detailed description below. can be

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included as part of the detailed description to aid understanding of the embodiments, provide various embodiments and, together with the detailed description, explain technical features of the various embodiments.
1 is a diagram illustrating a disaster monitoring system 10 according to an embodiment of the present invention.
2 is a flowchart illustrating a method of operating an image monitoring apparatus according to an exemplary embodiment.
3 is a diagram illustrating a method for a video monitoring apparatus to be allocated a TVWS available channel according to an embodiment of the present invention.
4 is a diagram illustrating an example of a method for a video monitoring apparatus to calculate a channel interference degree of a TVWS available channel according to an embodiment.
5 is a diagram schematically illustrating a TVWS available channel selected by a video monitoring apparatus according to an embodiment of the present invention.
6 and 7 are block diagrams illustrating the configuration of a video monitoring apparatus according to an exemplary embodiment.
8A and 8B are diagrams illustrating an image monitoring apparatus according to an exemplary embodiment.
9 is a diagram illustrating a form in which an image monitoring apparatus according to an exemplary embodiment is installed.
10 is a diagram illustrating an image monitoring apparatus according to an exemplary embodiment.

The following embodiments combine elements and features of the embodiments in a predetermined form. Each component or feature may be considered optional unless explicitly stated otherwise. Each component or feature may be implemented in a form that is not combined with other components or features. In addition, various embodiments may be configured by combining some components and/or features. The order of operations described in various embodiments may be changed. Some features or features of one embodiment may be included in another embodiment, or may be replaced with corresponding features or features of another embodiment.

In the description of the drawings, procedures or steps that may obscure the gist of various embodiments are not described, and procedures or steps that can be understood at the level of those of ordinary skill in the art are also not described. did

Throughout the specification, when a part is said to "comprising or including" a certain component, it does not exclude other components unless otherwise stated, meaning that other components may be further included. do. 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 hardware or software or a combination of hardware and software. can be implemented as Also, "a or an," "one," "the," and like related terms are used herein in the context of describing various embodiments (especially in the context of the claims that follow). Unless indicated otherwise or clearly contradicted by context, it may be used in a sense including both the singular and the plural.

The present disclosure relates to a video monitoring apparatus for monitoring a disaster situation and notifying when a disaster situation is detected, and a method of operating the same. The video monitoring apparatus according to various embodiments of the present disclosure may inform that a disaster situation has been detected by using a TV white space (TVWS) channel. Through this, the video monitoring apparatus and its operating method can effectively notify the occurrence of a disaster situation regardless of the coverage of a pay communication network such as an LTE communication network.

Hereinafter, embodiments according to various embodiments will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION The detailed description set forth below in conjunction with the appended drawings is intended to describe exemplary embodiments of various embodiments, and is not intended to represent the only embodiments.

In addition, specific terms used in various embodiments are provided to help the understanding of various embodiments, and the use of these specific terms may be changed to other forms without departing from the technical spirit of various embodiments. .

1 is a diagram illustrating a disaster monitoring system 10 according to an embodiment of the present invention. Referring to FIG. 1 , a disaster monitoring system 10 may include a video monitoring device 100 , a disaster management server 200 , and a TVWS repeater 300 .

TVWS refers to an empty frequency band that is not used regionally to prevent interference between broadcasting stations among channels 14 to 51 (470 MHz to 698 MHz), which are the broadcasting bands of DTV. The corresponding frequency band may be used as a separate channel in units of 6 MHz. In the present disclosure, the video monitoring apparatus 100 may be a TV band device using the TVWS band by accessing the TVWS band. The TV band device may indicate a device that accesses the TVWS band and uses the TVWS band. The video monitoring apparatus 100 may transmit information related to a disaster situation to a TVWS repeater or a disaster management server by using an available TVWS channel.

The video monitoring apparatus 100 according to embodiments of the present disclosure may be installed in an area requiring monitoring of a disaster situation. When a disaster situation is detected in an area where the video monitoring device is installed, the video monitoring device 100 may transmit information related to the disaster situation to the disaster management server 200 . The information related to the disaster situation may be real-time image data and a disaster detection message.

According to an embodiment, the video monitoring apparatus 100 may include an image capturing module such as a camera to monitor a disaster situation. The image monitoring apparatus 100 may acquire image data from an external photographing device (not shown) connected by wire or wirelessly. The external photographing device may be a CCTV that acquires and transmits image data in real time.

The video monitoring apparatus 100 according to embodiments of the present disclosure may transmit a disaster detection message indicating that a disaster situation has been detected to the disaster management server 200 to effectively notify the occurrence of a disaster situation. In addition, the video monitoring apparatus 100 may be helpful in action and rescue for a disaster situation by transmitting image data of an area where a disaster situation occurs to the disaster management server 200 in real time.

Referring to FIG. 1 , the video monitoring apparatus 100 may transmit video data and a disaster detection message to the disaster management server 200 through the TVWS repeater 300 . For example, the video monitoring apparatus 100 may transmit video data and a disaster detection message to the TVWS repeater 300 through an available TVWS channel. The TVWS repeater 300 may transmit the received image data and the disaster detection message to the disaster management server 200 .

For example, the disaster management server 200 may be a device that does not include a TVWS communication module. In this case, the TVWS repeater 300 may transmit the image data and the disaster detection message to the disaster management server 200 through a channel other than the TVWS channel. In the embodiment of FIG. 1 , the video monitoring apparatus 100 transmits video data and a disaster detection message to the disaster management server 200 through the TVWS repeater 300 , but the present disclosure is not limited thereto. The video monitoring apparatus 100 may directly transmit video data and a disaster detection message to the disaster management server 200 .

The TVWS repeater 300 may modulate the image data and the disaster detection message with a signal of a format other than the TVWS channel signal and transmit it to the disaster management server 200 . Signals of other formats may include signals of all formats that can be transmitted through a network except for the TVWS signal. As a specific example, the TVWS repeater 300 may transmit image data and a disaster detection message to the disaster management server 200 through the base station 400 providing the 3GPP network.

According to an embodiment, a network excluding the TVWS signal means a connection structure capable of exchanging information with each other, such as a plurality of terminals and servers, and an example of such a network includes RF, 3rd Generation Partnership Project (3GPP) Network, Long Term Evolution (LTE) network, 5th Generation Partnership Project (5GPP) network, World Interoperability for Microwave Access (WIMAX) network, Internet, Local Area Network (LAN), Wireless LAN (Wireless Local Area Network), WAN (Wide Area Network), PAN (Personal Area Network), Bluetooth (Bluetooth) network, NFC network, satellite broadcasting network, analog broadcasting network, Digital Multimedia Broadcasting (DMB) network, and the like are included, but are not limited thereto.

In an embodiment of the present disclosure, the disaster management server 200 may include all types of devices capable of receiving data from the video monitoring apparatus 100 and processing the received data. For example, the disaster management server 200 may include a PC, a data processing device, a cloud server composed of a plurality of hardware, and the like. The disaster management server 200 may be utilized in a disaster-related control center or the like. In this case, the disaster management server 200 may additionally include a function of displaying an image screen.

In an embodiment of the present disclosure, the TVWS repeater 300 may include all types of devices capable of receiving data from the video monitoring device 100 through a TVWS channel and processing the received data. For example, the TVWS repeater 300 may be a fixed data processing device. The TVWS repeater 300 may transmit/receive data through a TVWS channel. The TVWS repeater 300 may additionally include a communication module capable of transmitting and receiving data through another channel or another communication method in addition to the TVWS channel.

Hereinafter, a method for a video monitoring apparatus to transmit information related to a disaster situation to a TVWS repeater or a disaster management server using a TVWS channel according to an embodiment of the present invention will be described.

2 is a flowchart illustrating a method of operating an image monitoring apparatus according to an exemplary embodiment.

Referring to FIG. 2 , in step S201, the video monitoring apparatus may monitor a disaster situation in an area where the video monitoring apparatus is installed based on image data captured in real time. According to an embodiment, the video monitoring apparatus may acquire real-time image data of capturing an area in which the video monitoring apparatus is installed. Here, the area in which the video monitoring apparatus is installed may indicate an area within coverage that can be photographed based on a location in which the video monitoring apparatus is installed.

For example, the image monitoring apparatus may include an image capturing module such as a camera. Alternatively, the image monitoring apparatus may acquire image data from an external photographing apparatus connected by wire or wirelessly. The external photographing device may be a CCTV that acquires and transmits image data in real time.

Next, the video monitoring apparatus may analyze the image data to monitor the disaster situation in the area where the video monitoring apparatus is installed. For example, the disaster situation may include at least one of a fire, a rescue request, and a distress situation. The video monitoring apparatus may analyze video data in real time.

According to an embodiment, the image monitoring apparatus may detect information indicating a disaster situation from image data obtained by using a pre-learned object recognition model. In this case, the object recognition model may be a type of a pre-trained neural network. The object recognition model may be based on learning according to a deep neural model technique.

Specifically, the object recognition model may be a set of algorithms for identifying and/or judging objects included in an image by extracting and using various properties included in the image using the results of statistical machine learning. The object recognition model may be a learning model that extracts at least one object from an image by using a foreground and background recognition method. The image monitoring apparatus may determine whether the image data includes information indicating a disaster situation based on the object recognized using the object recognition model.

For example, the video monitoring apparatus may recognize a plurality of objects from the obtained image data. Also, the video monitoring apparatus may determine whether each of the recognized plurality of objects corresponds to an object representing a disaster situation. Specifically, the object representing the disaster situation may include an object recognized as the occurrence of a fire. In addition, the object representing the disaster situation may include at least one of an object recognized as a state requiring rescue and an object recognized as a state requesting help.

In step S202, when information indicating a disaster situation is detected from the image data, the video monitoring apparatus may generate a disaster detection message indicating that a disaster situation has been detected. The disaster detection message may include location information indicating a location where the video surveillance apparatus is installed. Also, the disaster detection message may include a disaster code. Here, the disaster code may be code information promised in advance to indicate the type of disaster. For example, different disaster codes may be indicated for each disaster situation. The control tower server may check the disaster situation by using the disaster code included in the disaster detection message.

Meanwhile, according to an embodiment, when information indicating a disaster situation is not detected from the image data, the image monitoring apparatus may transmit the acquired image data to an external image storage server and delete the image data that has been transmitted.

In step S203, the video monitoring device may receive TVWS channel availability information from the TVWS database managing TVWS channels based on the location information of the video monitoring device. In the present disclosure, the TVWS database may be a database server device that manages the TVWS spectrum. The TVWS channel availability information may include at least one of whether a channel is used for each TVWS channel and a TVWS channel use schedule.

According to an embodiment, the video monitoring apparatus may transmit a TVWS channel availability information request to the TVWS database. The TVWS channel availability information request may include location information of the video monitoring device. The TVWS database may transmit TVWS channel availability information corresponding to a location where the video monitoring device is installed to the video monitoring device based on the location information of the video monitoring device. TVWS channel availability information may be different for each region due to the specificity of TVWS spectrum utilization. TWVS available channels may be distributed differently for each region. The video monitoring device may receive TVWS channel availability information corresponding to a location where the video monitoring device is installed. A method for the video monitoring apparatus to receive TVWS channel availability information and to receive an assignment of a channel to be used using the received TVWS channel availability information will be described in detail with reference to FIG. 3 to be described later.

In step S204, the video monitoring device may transmit the video data and the disaster detection message to the TVWS repeater through the TVWS communication module based on the TVWS channel availability information. In the present disclosure, the TVWS communication module may be a communication module capable of transmitting and receiving data through a TVWS channel. The video monitoring apparatus may transmit video data and a disaster detection message by using at least some of a plurality of available TVWS channels that are not used by other TV band devices within the same TVWS area.

According to an embodiment, when information indicating a disaster situation is detected, the video monitoring apparatus may transmit image data corresponding to the disaster situation and a disaster detection message to the disaster situation management server. In this case, the image data may be composed of a plurality of data packets determined in order. Also, the disaster detection message may be a message in a predefined format. The disaster situation management server may recognize a disaster situation by parsing the disaster detection message.

For example, the video monitoring device may transmit video data corresponding to a disaster situation and a disaster detection message to the TVWS repeater through the TVWS communication module. In this case, the TVWS repeater may transmit the video data and the disaster detection message received from the video monitoring device to the disaster situation management server. In this case, the TVWS repeater may transmit the image data and the disaster detection message using a frequency band other than the TVWS. For example, the TVWS repeater may transmit image data and a disaster detection message using a frequency band in which LTE or WiFi is serviced. However, the present disclosure is not limited thereto.

The image data corresponding to the disaster situation may be real-time image data obtained by photographing the corresponding area from the time when the disaster situation is detected until the disaster situation is taken or the disaster situation is ended. When the video surveillance device detects information corresponding to a disaster situation, an action is taken for the disaster situation. Video data captured in real time until the end of the disaster situation can be transmitted through available TVWS channels.

Meanwhile, according to an embodiment of the present invention, each of the image data and the disaster detection message may be transmitted through a plurality of TVWS channels having different channel identification information. The video monitoring apparatus may simultaneously transmit the video data and the disaster detection message through a plurality of TVWS channels having different channel identification information.

For example, the video surveillance apparatus may transmit image data through a first channel and transmit a disaster detection message through a second channel. In this case, the first channel and the second channel may be TVWS channels having different channel identification information. For example, the channel identification information of the first channel may indicate '15', and the channel identification information of the second channel may indicate '17'.

According to an embodiment, the video monitoring apparatus may determine an image transmission channel through which image data is transmitted and a message transmission channel through which a disaster detection message is transmitted, based on the TVWS channel availability information. The video surveillance apparatus may transmit image data through an image transmission channel and transmit a disaster detection message through a message transmission channel.

For example, the video monitoring apparatus may calculate the channel interference degree of each of the plurality of TVWS available channels based on the TVWS channel available information. Here, the plurality of TVWS available channels may indicate TVWS channels that are not being used by other TV band devices in the same TVWS area or are not scheduled to be used for a certain time according to TVWS channel availability information. The channel interference degree may be a relative numerical value indicating the degree of interference expected by the use of different channels or use of the same channel in different TVWS regions for each channel. A method for the video monitoring apparatus to calculate the channel interference degree of each TVWS available channel will be described in detail with reference to FIG. 4 to be described later.

According to an embodiment, the video monitoring apparatus may determine an image transmission channel through which image data is to be transmitted and a message transmission channel through which to transmit a disaster detection message, based on the degree of channel interference of each of the plurality of available TVWS channels. In this case, the channel interference degree of the message transmission channel may be smaller than the channel interference degree of the video transmission channel. The video monitoring apparatus may set the channel interference degree of the message transmission channel to be smaller than the channel interference degree of the video transmission channel. The video surveillance apparatus may transmit a disaster detection message separately from the video data to effectively inform that a disaster situation has occurred. The video surveillance apparatus may transmit a disaster detection message through a channel having a relatively small degree of channel interference to more effectively transmit that a disaster situation has occurred.

Hereinafter, a method for the video monitoring apparatus to be allocated a TVWS available channel selected based on the TVWS available channel information will be described in detail with reference to FIG. 3 .

3 is a diagram illustrating a method for a video monitoring apparatus to be allocated a TVWS available channel according to an embodiment of the present invention. In the present disclosure, the video monitoring device may be a device previously registered in the TVWS database. For example, the video monitoring device may be a TV band device that has completed a registration procedure through the TVWS master device. In this case, the TVWS database may store registration information for identifying the video monitoring device, the type of the video monitoring device (eg, purpose of use, use organization), and the like. In addition, the video surveillance device can periodically synchronize with the TVWS database.

Referring to FIG. 3 , in step S301 , the video monitoring apparatus may transmit a TVWS channel availability information request to a TVWS database (TVWS DB). The TVWS channel availability information request may include registration information of the video monitoring device. The video monitoring device may transmit a TVWS channel availability information request including location information of the video monitoring device. In step S302, the TVWS database may transmit TVWS channel availability information to the video monitoring device. In this case, the TVWS channel availability information may be TVWS channel availability information corresponding to a location where the video monitoring apparatus is installed.

In step S303, the video monitoring device may select an available TVWS channel to be used for transmitting video data and a disaster detection message. The video monitoring apparatus may select an available TVWS channel to be used based on the TVWS channel available information received in step S302.

In step S304, the video monitoring device may transmit a TVWS channel usage notification to the TVWS database. The TVWS channel usage notification may include identification information indicating available TVWS channels selected by the video monitoring apparatus. In addition, the TVWS channel usage notification may include time information to use the available TVWS channel selected by the video monitoring device. The time information to use the TVWS available channel may be in the form of a multiple of a preset unit time. The video surveillance apparatus may determine the time to use the available TVWS channels according to the disaster code. When there are a plurality of TVWS available channels selected by the video monitoring apparatus, the TVWS channel usage notification may include usage time information for each of the plurality of TVWS available channels.

According to an embodiment, the video monitoring apparatus may need to use the corresponding channel even after the time indicated by the previously transmitted time information. In this case, the video monitoring apparatus may update the additional usage time until the time indicated by the previously transmitted time information expires. For example, the video monitoring device may transmit additional usage time information to the TVWS database to extend the usage time for a TVWS available channel selected by the video monitoring device.

In step S305, the video monitoring device may receive a TVWS channel usage response from the TVWS database. The video monitoring apparatus may receive a usage response for use of the selected TVWS available channel. The TVWS channel use response may include identification information indicating an available TVWS channel selected by the video surveillance apparatus. After receiving the TVWS channel use response, the video monitoring device may use the corresponding TVWS available channel. The video monitoring apparatus may use the selected TVWS available channel from after receiving the TVWS channel use response to the time indicated by the use time information.

Although it is illustrated that the video monitoring apparatus directly exchanges information with the TVWS database in the embodiment of FIG. 3 , the present disclosure is not limited thereto. For example, the video surveillance apparatus may exchange information with the TVWS database through the TVWS master device. The TVWS master device may be a device that registers one or more TV band devices in the TVWS database and manages synchronization information between the TV band devices and the TVWS database.

Hereinafter, a method for the video monitoring apparatus according to an embodiment of the present invention to calculate the channel interference degree of each TVWS available channel will be described with reference to FIG. 4 . 4 is a diagram illustrating an example of a method for the video monitoring apparatus 40 to calculate a channel interference degree of an available TVWS channel according to an embodiment.

According to an embodiment, the channel interference degree may include an adjacent channel interference degree and a co-channel interference degree. In the present disclosure, the degree of adjacent channel interference may indicate the degree of channel interference that occurs when a frequency channel adjacent to a target channel is used within the same TVWS region.

Referring to FIG. 4 , the video monitoring apparatus 40 may be a device installed in the first TVWS area 401 . Also, in the first TVWS area 401 , the first device 410 , which is a TV band device, may be using any one of TVWS available channels. In this case, the video monitoring apparatus 40 may calculate the degree of channel interference based on the identification information of the TVWS channel being used by the first device 410 . For example, a channel adjacent to a TVWS channel that is already in use may have a greater degree of channel interference.

In the present disclosure, the co-channel interference degree may indicate a channel interference degree that occurs when another TV band device uses the same channel as a target channel in a different TVWS region. Referring to FIG. 4 , in the second TVWS area 402 adjacent to the first TVWS area 401 , a second device 420 that is a TV band device may be using any one of TVWS available channels. In this case, the video monitoring device 40 is based on the identification information of the TVWS channel being used by the second device 420 , the TVWS channel being used by the second device 420 and the channel interference degree of the TVWS available channel having the same identification information can be calculated.

Hereinafter, for convenience of description, a method of calculating the channel interference of channel '15', which is an arbitrary TVWS channel, will be described as an example. According to a specific embodiment, the TVWS available channels in the first TVWS area 401 may include channel '15'. That is, the channel '15' in the first TVWS area 401 may be an unused and empty channel. In this case, the first device 410 may be using the channel '17' and the second device 420 may be using the channel '15'. In this case, the degree of channel interference of channel '15' may be interfered with by signals transmitted and received through the channel being used by the first device 410 and the channel being used by the second device 420 .

According to an embodiment, the video monitoring apparatus 40 may calculate the channel interference degree (I) of each TVWS available channel by using the following equation. In the following equation, k may be identification information indicating the k-th channel from the TVWS channel corresponding to the lowest frequency band among all TVWS channels. That is, I(k) represents the channel interference degree of the k-th channel.

[Equation]

In the equation, USE(x) may be a function that outputs a preset value depending on whether the x-th channel is a channel usable within the same TVWS region as the video monitoring device. If the x-th channel is an available channel, USE(x) may return '0', and if the x-th channel is already in use, USE(x) may return '1'. N may represent the total number of TVWS channels. N may be an integer greater than 1. For example, N may be 38.

USE_m(k) may be a function that outputs a preset value according to whether the k-th channel is a usable channel in the m-th adjacent TVWS area different from the video monitoring device 40 . In the present disclosure, the adjacent TVWS area may indicate a TVWS area adjacent to the TVWS area in which the video monitoring apparatus 40 is installed. The video monitoring apparatus 40 may assign identification numbers from 1 to M for a plurality of adjacent TVWS areas. M may represent the number of adjacent TVWS regions. M may be an integer greater than 1.

USE_m(k) returns '0' if the k-th channel is an available channel in the m-th adjacent TVWS area, and USE_m(k) returns '1' if the k-th channel is already in use in the m-th adjacent TVWS area. ' can be returned. R_m may indicate a distance between the TV band device using the k-th channel in the m-th adjacent TVWS region and the video monitoring apparatus 40 . In this case, the unit of R_m may be km. The video monitoring apparatus 40 may calculate the channel interference degree of each of the plurality of TVWS available channels according to the above equation.

In the embodiment of FIG. 4 , channel '14' and channel '18' may be TVWS-enabled channels. In this case, the channel interference degree of the channel '14' may be lower than the channel interference degree of the channel '15'. Also, the degree of channel interference of channel '18' may be higher than that of channel '15'. The video monitoring apparatus 40 may determine the channel '14' having the lowest degree of channel interference as the message transmission channel. The video monitoring device 40 may transmit a disaster detection message through the channel '14'. Also, the video monitoring device 40 may transmit image data through channels '15' and '18', which are the remaining TVWS available channels.

Meanwhile, the image monitoring apparatus may transmit image data through a plurality of image transmission channels. For example, through step S204 of FIG. 2 , in the embodiment described above, the video monitoring apparatus may determine one or more video transmission channels to transmit image data and a message transmission channel to transmit a disaster detection message. According to a specific embodiment, the image transmission channel may include a first image transmission channel and a second image transmission channel selected from among a plurality of TVWS available channels. As described above, the image data may include a plurality of data packets that are ordered. The video monitoring apparatus may divide the plurality of data packets into a first video transmission channel and a second video transmission channel and transmit them.

Hereinafter, a method for the video monitoring apparatus according to an embodiment of the present invention to transmit video data using a plurality of TVWS available channels will be described with reference to FIG. 5 . 5 is a diagram schematically illustrating a TVWS available channel selected by a video monitoring apparatus according to an embodiment of the present invention.

Referring to FIG. 5 , when there are Z or more TVWS available channels according to TVWS channel available information, the video monitoring apparatus 50 may select Z video transmission channels 501 and one message transmission channel 502 . In this case, Z may be an integer greater than 1. The video monitoring device 50 may transmit video data to the disaster management server 51 through the Z video transmission channels 501 . The video monitoring apparatus 50 may transmit a disaster detection message to the disaster management server 51 through the message transmission channel 502 .

According to an embodiment, when Z is 2, the image transmission channel may include a first image transmission channel and a second image transmission channel. The video monitoring apparatus 50 determines a first ratio and a second image indicating a rate of data packets to be transmitted through the first video transmission channel based on the channel interference degree of the first video transmission channel and the channel interference degree of the second video transmission channel. A second rate indicating a rate of data packets to be transmitted through a transmission channel may be determined. The video monitoring apparatus 50 may transmit the video data to the disaster management server 51 based on the determined first and second ratios.

For example, as the degree of channel interference of the video transmission channel decreases, more packets may be transmitted through the corresponding video transmission channel. That is, the smaller the degree of channel interference of the video transmission channel, the greater the rate of packets transmitted through the video transmission channel. According to a specific embodiment, when the channel interference degree of the first image transmission channel is lower than the channel interference degree of the second image transmission channel, the first ratio may be greater than the second ratio. Conversely, when the channel interference degree of the second image transmission channel is lower than the channel interference degree of the first image transmission channel, the first ratio may be smaller than the second ratio.

Meanwhile, the video monitoring device 50 may transmit video data by flexibly using available TVWS channels approved for use from the TVWS database. According to an embodiment, the video monitoring apparatus 50 may transmit at least some of a plurality of data packets included in the video data through the message transmission channel 502 after completing transmission of the disaster detection message. The video monitoring apparatus 50 may efficiently transmit video data corresponding to a disaster situation by using the message transmission channel allocated together with the video transmission channel.

For example, the video monitoring apparatus 50 may receive a response message to the disaster detection message after transmitting the disaster detection message. The video monitoring device 50 may receive a response message to the disaster detection message from a TVWS repeater (not shown) or may receive a response message to the disaster detection message from the disaster management server 51 . In this case, the response message may be received through a message transmission channel, but the present disclosure is not limited thereto. For example, the response message may be received through a frequency band in which LTE or WiFi service is supported. Next, the video monitoring apparatus 50 may transmit at least some of the plurality of data packets included in the video data through the message transmission channel 502 after the response message is received.

According to an additional embodiment, after the video monitoring device 50 completes transmitting the disaster detection message, at least one of information indicating the carbon dioxide concentration, carbon monoxide concentration, fine dust concentration, and ultrafine dust concentration in the atmosphere through the message transmission channel can be transmitted. The video monitoring device 50 may utilize a message transmission channel for transmitting at least one of information indicating the concentration of carbon dioxide in the atmosphere, the concentration of carbon monoxide, the concentration of fine dust, and the concentration of ultrafine dust while the image data is being transmitted.

According to an embodiment, the video monitoring apparatus may provide a subscription service. In addition, the video monitoring device may have a system of permission to use the video monitoring device. For example, the video surveillance apparatus may encrypt Internet traffic using VPN encryption technology or GATE encryption technology. In this case, user information generated and stored by the video monitoring device may be encrypted using the AS256 method.

6 and 7 are block diagrams illustrating the configuration of a video monitoring apparatus according to an exemplary embodiment.

As shown in FIG. 6 , the video monitoring apparatus 600 may include a processor 610 , a TVWS communication unit 620 , and a memory 630 . However, not all of the components shown in FIG. 6 are essential components of the video monitoring apparatus 600 . The video monitoring apparatus 600 may be implemented by more components than the components shown in FIG. 6 , or the video monitoring apparatus 600 may be implemented by fewer components than the components shown in FIG. 6 . For example, as in the embodiment of FIG. 7 , the video monitoring device 700 includes a processor 710 , a TVWS communication unit 720 , and a memory 730 in addition to a battery 740 , a solar panel 750 and a battery management (BMS). system) 760 may be further included. Also, the video monitoring apparatus 700 may further include a camera (not shown) and an output unit (not shown).

The processor 610 generally controls the overall operation of the video monitoring apparatus 600 . The processor 610 may include one or more processors to control other components included in the video monitoring apparatus 600 . For example, the processor 610 may control the TVWS communication unit 620 and the memory 630 in general by executing programs stored in the memory 630 . In addition, the processor 610 may execute the programs stored in the memory 630 to perform the function of the video monitoring apparatus illustrated in FIGS. 1 to 5 .

According to an embodiment, the processor 610 may monitor a disaster situation in an area in which an image monitoring apparatus is installed based on image data captured in real time. According to an embodiment, the processor 610 may acquire real-time image data of an area in which an image monitoring apparatus is installed.

Next, the processor 610 may analyze the image data to monitor the disaster situation in the area where the image monitoring apparatus is installed. According to an embodiment, the processor 610 may detect information indicating a disaster situation from image data obtained using a pre-trained object recognition model. For example, the processor 610 may recognize a plurality of objects from the obtained image data. Also, the processor 610 may determine whether each of a plurality of recognized objects corresponds to an object representing a disaster situation.

When information indicating a disaster situation is detected from the image data, the processor 610 may generate a disaster detection message indicating that a disaster situation has been detected. Conversely, when information indicating a disaster situation is not detected from the data, the video monitoring apparatus may transmit the acquired image data to an external image storage server and delete the image data that has been transmitted.

The processor 610 may receive TVWS channel availability information from a TVWS database that manages TVWS channels based on the location information of the video monitoring device. According to an embodiment, the processor 610 may transmit a TVWS channel availability information request to the TVWS database. The processor 610 may receive TVWS channel availability information from the TVWS database in response to the TVWS channel availability information request.

The processor 610 may transmit image data and a disaster detection message to the TVWS repeater through the TVWS communication unit 620 based on the TVWS channel availability information. In this case, each of the image data and the disaster detection message may be transmitted through a plurality of TVWS channels having different channel identification information. The processor 610 may simultaneously transmit each of the image data and the disaster detection message through a plurality of TVWS channels having different channel identification information.

According to an embodiment, the processor 610 may determine an image transmission channel through which image data is transmitted and a message transmission channel through which a disaster detection message is transmitted based on the TVWS channel availability information. The processor 610 may transmit image data through an image transmission channel and transmit a disaster detection message through a message transmission channel.

For example, the processor 610 may calculate a channel interference degree of each of the plurality of TVWS available channels based on the TVWS channel available information. The processor 610 may calculate the channel interference degree of each of the plurality of TVWS available channels using the above-described equation with reference to FIG. 4 . Next, the processor 610 may determine an image transmission channel through which image data is transmitted and a message transmission channel through which a disaster detection message is transmitted based on the channel interference of each of the plurality of available TVWS channels. In this case, the channel interference degree of the message transmission channel may be smaller than the channel interference degree of the video transmission channel. The processor 610 may set the channel interference degree of the message transmission channel to be smaller than the channel interference degree of the image transmission channel. Next, the processor 610 may transmit image data through the determined image transmission channel and transmit a disaster detection message through the message transmission channel.

According to an embodiment, the processor 610 may transmit image data by flexibly using the available TVWS channels approved for use from the TVWS database. For example, after the processor 610 completes transmitting the disaster detection message, the processor 610 may transmit at least a portion of a plurality of data packets included in the image data through the message transmission channel.

Specifically, the processor 610 may receive a response message to the disaster detection message after transmitting the disaster detection message through the TVWS communication unit 620 . The processor 610 may receive a response message to the disaster detection message from the TVWS repeater or may receive a response message to the disaster detection message from the disaster management server. Next, after the response message is received, the processor 610 may transmit at least some of the plurality of data packets included in the image data through the message transmission channel.

According to an additional embodiment, the processor 610 transmits at least one of information indicating the carbon dioxide concentration, carbon monoxide concentration, fine dust concentration, and ultrafine dust concentration in the atmosphere through the message transmission channel after completing the transmission of the disaster detection message. can

The TVWS communication unit 620 may include one or more components that allow the video monitoring device 600 to communicate with another device (not shown) through a TVWS channel. The other device (not shown) may be a TVWS repeater or a disaster management server equipped with a TVWS communication function, but is not limited thereto. The TVWS communication unit 620 may transmit data related to a disaster situation to an external device or receive a response from the external device through the TVWS channel.

For example, the TVWS communication unit 620 may transmit information generated by the processor 610 through a TVWS channel. For example, the TVWS communication unit 620 may transmit the image data and the disaster detection message generated by the processor 610 to the TVWS repeater through the TVWS channel. The TVWS communication unit 620 may receive necessary information from an external device through a TVWS channel. For example, the TVWS communication unit 620 may receive a response message to the disaster detection message after transmitting the disaster detection message. The TVWS communication unit 620 may receive a response message to the disaster detection message from the TVWS repeater.

The memory 630 may store a program for processing and controlling the processor 610 . For example, the memory 630 may store instructions for the operation of the video monitoring apparatus 600 . Also, the memory 630 may store data generated by the processor 610 . For example, the memory 630 may store lost and found information generated by the processor 610 . The memory 630 may store information input to or output from the video monitoring device 600 . For example, the memory 630 may store at least one of lost and found information and lost and found return guide information generated by the processor 610 . The memory 630 may store at least one of order information and payment information.

The memory 630 may include a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (eg SD or XD memory), and a RAM. (RAM, Random Access Memory) SRAM (Static Random Access Memory), ROM (Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), PROM (Programmable Read-Only Memory), magnetic memory, magnetic disk , may include at least one type of storage medium among optical disks.

8A and 8B are diagrams illustrating an image monitoring apparatus according to an exemplary embodiment.

Referring to FIG. 8 , the video monitoring apparatus 800 of the present invention may be installed on a fixing means 820 and driven through a solar energy power means 810 . In this case, the video monitoring device 800 may correspond to the video monitoring device 600 of FIG. 6 and/or the video monitoring device 700 of FIG. 7 .

The solar energy power means 810 may include a battery cell, a solar cell, and the like, and the fixing means 820 may include a utility pole, a pole, or the like. In this case, the video monitoring device 800 may serve as a closed-circuit television (CCTV) in order to facilitate a search for a surrounding area and acquisition of image information in case of a disaster.

In addition, the video monitoring device 800 notifies the evacuation site to the distressed through an output device such as a speaker or a display, or transmits and/or transmits information indicating the evacuation site to the user's terminal through the TVWS communication unit 720 Broadcasting is possible.

If the place where the video monitoring device 800 is installed is a crime area, it may serve to lower the crime rate through an alarm and/or lighting of the output device.

9 is a diagram illustrating a form in which an image monitoring apparatus according to an exemplary embodiment is installed.

For example, information and/or signals are shared through TVWS RF communication between video monitoring devices 800 installed at intervals of about 1-3 km, and information acquired through the process is notified, or shared and/or shared with a user's terminal. Or you could be broadcasting.

10 is a diagram illustrating an image monitoring apparatus according to an exemplary embodiment.

Referring to FIG. 10 , the video monitoring apparatus 800 of the present invention may be: buried underground or driven through a power line 910 installed on the ground. In addition, the video monitoring device 800 may: transmit/receive predetermined information and/or signals to/from other video monitoring devices through a network line 920 buried underground or installed on the ground, or may transmit/receive predetermined information and/or signals to/from a user's terminal and/or server, etc. Information and/or signals may be transmitted and received. In this case, the video monitoring device 800 may correspond to the video monitoring device 600 of FIG. 6 and/or the video monitoring device 700 of FIG. 7 .

The various embodiments described above may be embodied in other specific forms without departing from the technical idea and essential characteristics thereof. Accordingly, the above detailed description should not be construed as restrictive in all respects but as exemplary. The scope of the various embodiments should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the various embodiments are included in the scope of the various embodiments. In addition, claims that are not explicitly cited in the claims may be combined to form an embodiment, or may be included as new claims by amendment after filing.

Claims (5)

In a video surveillance device for notifying a disaster situation using a TV white space (TVWS) band,
a memory for storing instructions for operation of the video surveillance apparatus; processor; and a TVWS communication unit for transmitting and receiving data through a TVWS channel; including,
The processor is:
Monitoring the disaster situation in the area where the video monitoring device is installed based on the video data captured in real time,
When information indicating a disaster situation is detected from the image data, generating a disaster detection message indicating that the disaster situation has been detected,
receiving TVWS channel availability information from a TVWS database that manages TVWS channels based on the location information of the video monitoring device;
Transmitting the image data and the disaster detection message to a TVWS repeater through the TVWS communication unit based on the TVWS channel availability information;
The video data and the disaster detection message are transmitted through TVWS channels having different channel identification information, respectively,
The processor is:
calculating a channel interference degree of each of a plurality of TVWS available channels based on the TVWS channel availability information;
Determining a video transmission channel for transmitting the image data and a message transmission channel for transmitting the disaster detection message based on the calculated channel interference of each of the plurality of available TVWS channels,
When the TVWS channel availability information includes information indicating whether N TVWS channels are available for each N TVWS channels, and there are M adjacent TVWS areas adjacent to the TVWS area to which the video monitoring apparatus belongs, the processor:
When calculating the channel interference degree of each of the plurality of TVWS available channels, it is characterized in that the channel interference degree I(k) of the k-th TVWS channel is calculated according to the following equation,
[Equation]

In the above equation, n is identification information indicating an n-th TVWS channel from a TVWS channel corresponding to the lowest frequency band among the N TVWS channels, and m is identification indicating an m-th adjacent TVWS region among the M adjacent TVWS regions. is information,
The USE(n) returns '0' if the nth TVWS channel is an available channel, and returns '1' if the nth TVWS channel is already in use,
The USE_m(k) returns '0' if the k-th channel is an available channel in the m-th TVWS region, and '1' if the k-th channel is already in use in the m-th TVWS region. return,
wherein R_m represents a distance between a TV band device using the k-th channel and the video monitoring device in the m-th adjacent TVWS region. According to claim 1,
The processor is:
transmitting the image data through the image transmission channel;
transmitting the disaster detection message through the message transmission channel;
and a channel interference degree of the video transmission channel is smaller than a channel interference degree of the message transmission channel. delete 3. The method of claim 2,
The image data includes a plurality of data packets determined in order,
The processor is:
After transmitting the disaster detection message, receiving a response message to the disaster detection message from the TVWS repeater,
After the response message is received, at least a portion of the plurality of data packets included in the image data is transmitted through the message transmission channel. 3. The method of claim 2,
The processor is:
After transmitting the disaster detection message, receiving a response message to the disaster detection message from the TVWS repeater,
After the response message is received, information indicating carbon dioxide concentration, carbon monoxide concentration, fine dust concentration, and ultrafine dust concentration in the atmosphere is additionally transmitted through the message transmission channel.

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