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公开(公告)号：KR101472583B1
公开(公告)日：2014-12-16
申请号：KR1020140010948
申请日：2014-01-28
Applicant: 국민대학교산학협력단
IPC: H04B14/02
CPC classification number: H04B14/026 , H04L7/0075
Abstract: 본 발명은 카메라로 광원을 촬영하여 광원의 온/오프 이미지로부터 데이터를 추출하도록 하는 카메라 통신 시스템 및 통신방법을 제공한다.
본 발명에 따른 카메라 통신 시스템은, 기설정된 펄스속도(pps)에 따라 전송하고자 하는 데이터에 대응하도록 온/오프(on/off)되는 광원; 및 기설정된 프레임속도(fps)에 따라 상기 광원의 온/오프 이미지를 연속 프레임으로 촬영하고 상기 촬영된 광원의 온/오프 이미지로부터 데이터를 추출하는 카메라를 포함하고, 상기 카메라는, 상기 광원의 온/오프 이미지를 촬영한 적어도 하나의 프레임 중 상기 각 온/오프별로 각각 하나의 프레임을 선택하고 상기 선택된 온/오프별 하나의 프레임에 대응하는 데이터를 추출한다.Abstract translation: 提供了一种能够通过用相机拍摄光源来从光源的开/关图像提取数据的相机通信系统和相机通信方法。 根据本发明的照相机通信系统包括：以预定脉冲速度（PPS）打开/关闭与要发送的数据相对应的光源;以及照相机，其将光源的开/关图像拍摄为 根据预定帧速度（FPS）的串行帧，并从光源的拍摄的开/关图像中提取数据。 摄像机对拍摄光源的开/关图像的帧中的每个开/关图像选择每个帧，并且提取与每个所选择的开/关图像相对应的一帧数据。
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公开(公告)号：KR1020140094396A
公开(公告)日：2014-07-30
申请号：KR1020130007189
申请日：2013-01-22
Applicant: 국민대학교산학협력단
IPC: G06K7/14 , G06K7/10 , H04B10/116
CPC classification number: G06K7/10029 , G06K7/1091 , H04B10/116
Abstract: The present invention relates to a method for identifying LED-ID tags in an LED-ID system wherein the LED-ID tags can be identified from LED-ID readers if data in the LED-ID readers collide due to the interference among a plurality of LED-ID tags. According to the present invention, the method for identifying LED-ID tags in an LED-ID system having the LED-ID tags and the LED-ID readers includes the steps of setting the number of LED-ID tags (β) to be identified and the interference probability (Q) thereof in the LED-ID readers; transmitting data in the LED-ID tags to the LED-ID readers according to the data request of the LED-ID readers; determining whether the data collision occurs due to the interference among the LED-ID tags upon the data transmission of the LED-ID tags in the LED-ID readers; assigning new time slot to the LED-ID tags upon the data collision; determining whether the LED-ID tag on which data interference has occurred is identified using the set interference probability (Q) when the data collision does not occur; and if the LED-ID tag on which the data interference has occurred is identified, determining all LED-ID tags have been identified.
Abstract translation: 本发明涉及一种用于识别LED-ID系统中的LED-ID标签的方法，其中如果LED-ID读取器中的数据由于多个 LED-ID标签。 根据本发明，在具有LED-ID标签的LED-ID系统和LED-ID读取器中识别LED-ID标签的方法包括以下步骤：设置要识别的LED-ID标签（β）的数量 及其在LED-ID读取器中的干扰概率（Q）; 根据LED-ID读取器的数据请求，将LED-ID标签中的数据发送到LED-ID读取器; 在LED-ID读取器中的LED-ID标签的数据传输时，确定LED-ID标签之间的干扰是否发生数据冲突; 在数据冲突时向LED-ID标签分配新的时隙; 在不发生数据冲突的情况下，使用设定的干扰概率（Q）来确定是否发生了数据干扰的LED-ID标签; 识别发生数据干扰的LED-ID标签，确定所有LED-ID标签。
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公开(公告)号：KR101372373B1
公开(公告)日：2014-03-12
申请号：KR1020130007192
申请日：2013-01-22
Applicant: 국민대학교산학협력단
IPC: H04B10/116
Abstract: The present invention relates to a high-speed link switching method of an LED communication system capable of performing link switching at high speed by allowing an LED-ID system to determine whether to perform link switching in advance according to a moving trajectory of an LED-ID reader. The high-speed link switching method of an LED communication system including a plurality of LED-ID tags and LED-ID readers, which transmit and receive data using visible rays, according to the present invention comprises: a first step for allowing a location server to generate a link switching table to store link switching probability between LED-ID tags according to a moving trajectory of an LED-ID reader, based on location information transmitted from the LED-ID reader at constant intervals; a second step for allowing the location server to determine whether the moving trajectory of the LED-ID reader exists on the link switching table, based on the location information received from the LED-ID reader, if a link switching request is received from the LED-ID reader; a third step for allowing the location server to extract a target LED-ID tag, to which a new link is to be connected, using the link switching probability between the LED-ID tags according to the moving trajectory of the LED-ID reader stored in the link switching table and transmit the extracted target LED-ID tag to the LED-ID reader, if the moving trajectory of the LED-ID reader exists on the link switching table; and a fourth step for allowing the LED-ID reader to block a link connection with a currently linked LED-ID tag and set a new link connection with the extracted target LED-ID tag. [Reference numerals] (130) Communications network
Abstract translation: 本发明涉及一种LED通信系统的高速链路切换方法，其能够通过使LED-ID系统根据LED发光二极管的移动轨迹来预先确定是否进行链路切换来高速执行链路切换， 身份证读者。 根据本发明的包括使用可见光发送和接收数据的多个LED-ID标签和LED-ID读取器的LED通信系统的高速链路切换方法包括：第一步骤，用于允许位置服务器 基于从LED-ID读取器以恒定间隔发送的位置信息，生成链接切换表，以根据LED-ID读取器的移动轨迹来存储LED-ID标签之间的链接切换概率; 如果从LED接收到链路切换请求，则基于从LED-ID读取器接收的位置信息，允许位置服务器确定LED-ID读取器的移动轨迹是否存在于链路切换表上的第二步骤 -ID阅读器 第三步骤，根据所存储的LED-ID读取器的移动轨迹，使用位置服务器提取要连接新链接的目标LED-ID标签，使用LED-ID标签之间的链路切换概率 在链路切换表中，如果LED-ID读取器的移动轨迹存在于链路切换表上，则将所提取的目标LED-ID标签发送到LED-ID读取器; 以及第四步骤，用于允许LED-ID读取器阻止与当前链接的LED-ID标签的链接连接，并且与所提取的目标LED-ID标签设置新的链接连接。 （附图标记）（130）通信网络
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公开(公告)号：KR101360929B1
公开(公告)日：2014-02-12
申请号：KR1020130007188
申请日：2013-01-22
Applicant: 국민대학교산학협력단
IPC: H04L12/761 , H04B10/116
Abstract: The present invention relates to a packet broadcasting method which uses visible light communication (VLC) for broadcasting by allocating a channel according to QoS based on a data stream using a visible light MAC protocol when a channel newly subscribes to a broadcasting AP in a broadcasting system using VLC. The present invention includes: a step of broadcasting to a plurality of terminals through VLC by including channel information to a beacon frame in a broadcasting AP which performs VLC; a step of receiving the broadcasted beacon frame and transmitting a join message for newly joining into the AP; a step of checking traffic rate (r), beacon interval (BI), superframe duration (SD), the number (N) of slots of superframes and calculating the number of required time slots, Nrequirement; a step of determining if the number of required time slots, Nrequirement, satisfies a predetermined QoS or not; a step of allocating a channel to the terminal when the number of required time slots satisfies the QoS and broadcasting a packet having a superframe to the terminal through the allocated channel using the VLC; and a step of extracting a wanted data stream from the received superframe from the terminal. [Reference numerals] (AA) Start; (BB) End; (S300) Setting up traffic rate (r), beacon interval (BI), the number (N) of slots of superframes and superframe duration (SD); (S301) Calculating the number of required time slots, n_requirement; (S302) QoS satisfied?; (S303) Allocating channel; (S304) Refusing channel allocating
Abstract translation: 本发明涉及一种使用可见光通信（VLC）进行广播的分组广播方法，当广播系统在广播系统中新近订阅广播AP时，通过使用可见光MAC协议基于数据流来分配信道 使用VLC。 本发明包括：通过在执行VLC的广播AP中的信标帧中包括信道信息，通过VLC向多个终端广播的步骤; 接收广播信标帧并发送用于新加入AP的加入消息的步骤; 检查业务速率（r），信标间隔（BI），超帧持续时间（SD），超帧时隙数量（N）和计算所需时隙数量N步骤; 确定所需时隙的数量，N要求是否满足预定的QoS; 当所需时隙的数量满足QoS并且通过使用VLC通过分配的信道向终端广播具有超帧的分组时，向终端分配信道的步骤; 以及从所述终端从所接收的超帧中提取所需数据流的步骤。 （附图标记）（AA）开始; （BB）结束; （S300）设置通信速率（r），信标间隔（BI），超帧时隙数（N）和超帧持续时间（SD）; （S301）计算所需时隙数，n_requirement; （S302）QoS满足？ （S303）分配通道; （S304）拒绝信道分配
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公开(公告)号：KR1020130093831A
公开(公告)日：2013-08-23
申请号：KR1020120006872
申请日：2012-01-20
Applicant: 국민대학교산학협력단
Abstract: PURPOSE: A link recovery method which uses a mutual cooperation visible light communication way is provided to resume a transmission and a reception by using a multi-node in order to receive data from a node of a smooth communication among multiple mutual cooperation nodes. CONSTITUTION: A cooperative node (200) receives a fast link recovery (FLR) signal. The mutual cooperation node transmits the received FLR signal to a destination node (300). The destination node receives the FLR signal. The destination node transmits an FLR response (RSP) to the mutual cooperation node. The mutual cooperation node transmits the FLR RSP to a coordinator (100). The coordinator resumes a data transmission to the destination node through the mutual cooperation node.
Abstract translation: 目的：提供一种使用相互协作可见光通信方式的链路恢复方法，以便通过使用多节点恢复发送和接收，以便从多个相互协作节点之间的平滑通信的节点接收数据。 协议：协作节点（200）接收快速链路恢复（FLR）信号。 相互协作节点将接收到的FLR信号发送到目的地节点（300）。 目的节点接收FLR信号。 目的地节点向相互协作节点发送FLR响应（RSP）。 相互协作节点将FLR RSP发送到协调器（100）。 协调器通过相互协作节点恢复到目的地节点的数据传输。
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Patent Agency Ranking
公开(公告)号：KR102256878B1
公开(公告)日：2021-05-26
申请号：KR1020200164641
申请日：2020-11-30
Applicant: 국민대학교산학협력단
IPC: H04L27/26 , H04L27/10 , H04L27/148 , H04B10/116 , H04L27/156 , H04L25/03 , H04N5/225
Abstract: 본개시의일 실시예에따른신호수신장치의복조방법은롤링카메라를포함하는신호수신장치의프로세서가각 단계의적어도일부를수행하는복조방법으로서, 롤링카메라가광원을서로다른시간에복수회 촬영하여이미지프레임을생성하는단계, 이미지프레임에기초하여 FSK 변조신호및 OFDM 변조신호가포함된제1 신호를생성하는단계, 제1 신호에로우패스필터를적용하여 FSK 변조신호를생성하고, 제1 신호에하이패스필터를적용하여 OFDM 변조신호를생성하는단계및 생성된 FSK 변조신호및 OFDM 변조신호에기초하여각각데이터를추출하는단계를포함할수 있다.
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公开(公告)号：KR102256873B1
公开(公告)日：2021-05-26
申请号：KR1020200162961
申请日：2020-11-27
Applicant: 국민대학교산학협력단
IPC: H04L27/26 , H04L27/10 , H04L27/156 , H04B10/116 , H04L25/03 , H04N5/225
Abstract: 본개시의일 실시예에따른신호수신방법은하이브리드파형을이용하는신호수신방법으로서, 롤링카메라를포함하는신호수신장치의프로세서가각 단계의적어도일부를수행하는복조방법으로서, 롤링카메라가광원을서로다른시간에복수회 촬영하여복수의이미지프레임들을생성하는단계, 복수의이미지프레임들에기반하여 FSK 변조신호및 OFDM 변조신호가포함된제1 신호를생성하는단계, 제1 신호및 미리설정된복수의정합필터를컨볼루션연산하는단계및 컨볼루션연산의결과에기초하여제1 신호에포함된 FSK 변조신호및 OFDM 변조신호를검출하고, FSK 변조신호및 OFDM 변조신호에기초하여각각데이터를추출하는단계를포함할수 있다.
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公开(公告)号：KR102089875B1
公开(公告)日：2020-03-16
申请号：KR1020180162177
申请日：2018-12-14
Applicant: 국민대학교산학협력단
IPC: H04B10/116 , H04B10/66 , H04B10/50
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