Electronics and Telecommunications Research Institute

Yonsei University

Sk Telecom Company, Ltd.

Industrial Cooperation Foundation Chonbuk National University

Industrial Cooperation Foundation of Chonbuk National University

Dongaone Co., Ltd.

Cisc Semiconductor Design+consulting Gmbh

Jong-Suk Chae

Cheol-Sig Pyo

Cheol Sig Pyo

Ji-Hoon Bae

Gil-Young Choi

Chan-Won Park

Hee-Sook Mo

Won Kyu Choi

Gil Young Choi

Dong-Han Lee

Jae-Young Jung

Hae-Won Son

Won-Kyu Choi

Heyung Sub Lee

Tae-Joong Kim

Jae-Heung Kim

Jung-Im Kim

Sun-Joong Kim

Seung-Il Myong

Hyunseok Kim

Seong-Soon Joo

Hoe-Sung Yang

Sang Yeoun Lee

Hyun Woo Lee

Seung-Chan Bang

Woo-Yong Lee

Jae Ick Choi

Je-Hoon Yun

Su Na Choi

Yoonmee Doh

Nam-Ho Hur

Hyun Jun Lee

Joon-Hyung Kim

Jong Chern Lee

Kang Bok Lee

Hyung Do Choi

Dong-Beom Shin

Jeong Seok Kim

Nak-Seon Seong

Jae-Ryong Shim

Narm-Hee Lee

Hyuck-Jae Lee

Cheng-Hao Quan

Donghan Lee

Gil-young Choi

Heyung-sub Lee

Wun-Cheol Jeong

Jong-Moon Chung

Yong-Joon Lee

Bong Wan Kim

Juderk Park

Yong Heui Cho

Josef Preishuber-Pfluegl

Chang-Sub Shin

Nak Seon Seong

Man Sik Park

Chan-Soo Shin

Yoon-Mee Doh

Heyung-Sub Lee

Kwang-Soo Cho

Jong-sub Cha

Junho Yeo

Su-Jin Park

Chang Sub Shin

Hyoungsoo Lim

Yong-Sun Kim

Doo Ho Choi

Bong Soo Kim

Sang-joon Park

Hoe Sung Yang

Jee Sook Eun

You Sung Kang

Kyu Won Han

Yong-Je Choi

Seong-Lyun Kim

Sang-Woon Kwak

Myung-Sun Baek

Young-Su Kim

Joungil Yun

Yun-Jeong Song

Byung Chan Kim

Hyochan Bang

Hoon Jeong

Jae Gak Hwang

Sungsoo Kang

Jae Heum Lee

Kwang-Ryul Jung

Jae Hong Ruy

Ji Hoon Bae

Kwang Soo Cho

Mal-Hee Kim

Byung-Je Lee

Jong Moon Lee

Se Won Oh

Hae Won Son

Hee Sook Mo

Gwang Ja Jin

Young Keun Yoon

Se-Han Kim

Kang-Bok Lee

Provided is an apparatus for transmitting a signal based on a non-uniform inter-symbol interference (ISI) pattern, the apparatus that may transmit an output signal generated by modulating an input signal based on a parameter sequence to be used to control an interference pattern and a position of a transmission signal for each symbol using a faster than Nyquist (FTN) scheme.

Communication apparatus and method

An aging environment measurement apparatus measures aging environment data within an oak barrel and transmits the measured aging environment data within the oak barrel to a server, and the aging environment measurement apparatus is mounted in a bung of the oak barrel.

Apparatus and method for measuring aging environment

A tag of an apparatus for simultaneously identifying massive tags according to the present invention may include an analog circuit unit to communicate with a reader through an analog signal and to receive energy via magnetic coupling with the reader. Further, the tag may include a digital circuit unit to be supplied with power from the analog circuit unit. The digital circuit unit may support a sleep mode for the tag to stand by in a low power state after transmitting an identifier (ID) to the reader and a wait mode for controlling random access to the reader.

System for simultaneously identifying massive RFID tags using HF band

A radio frequency identification (RFID) smart shelf system manages a product through communication with an RFID tag that is attached to the product on a shelf, and includes an RFID reader, a plurality of reader antennas, and an RF switch that is connected between the RFID reader and the plurality of reader antennas. The RF switch periodically varies a phase difference between RF signals of a portion of a plurality of output connection ports that set a connection to each of the plurality of reader antennas.

Radio frequency switch and method for controlling the same, and radio frequency identification smart shelf system

A reader antenna includes dipole antennas, the dipole antennas including: a horizontal dipole antenna having the characteristic of horizontal polarization; and a dipole antenna perpendicular to the horizontal dipole antenna and including a vertical dipole antenna having the characteristic of vertical polarization, wherein the horizontal dipole antenna and the vertical dipole antenna may both have the characteristic of circular polarization. The reader antenna can be easily stored in an electronic shelf because it is realized in an ultrathin structure using a single-layered dielectric substrate.

Reader antenna and RFID electronic shelf including the same

A time synchronization method in a wireless sensor network, a low power routing method using a reservation scheme, and an apparatus for performing the method are provided. The time synchronization method in the wireless sensor network may include: receiving a first synchronization request command packet from a parent node that manages time synchronization for a predetermined synchronization region; receiving, from the parent node, a second synchronization request command packet that has a transmission timestamp value of the first synchronization request command packet; and performing time synchronization for a child node based on a reception time of the first synchronization request command packet, a reception time of the second synchronization request command packet, and the transmission timestamp value of the first synchronization request command packet.

Time synchronization and routing method in wireless sensor network, and apparatus for enabling the method

Provided are an RFID reader and a method for controlling a gain thereof. The RFID reader includes an amplifier and an AGC circuit. The amplifier controls the gain of an RX signal, received from an RFID tag, in response to an AGC signal. The AGC circuit measures a signal level in an ante-preamble period of the RX signal and generates an AGC signal to control the gain of the RX signal, on the basis of the measured signal level.

RFID reader and method for controlling gain thereof

Provided is an apparatus and method for transmitting packet data in a WSN. The apparatus for transmitting packet data in a WSN includes: a serial-to-parallel converter to parallel-convert information and output the converted information to two channel paths; a Walsh code pair generation unit to select an arbitrary Walsh code pair, mix the selected Walsh code pair with a pseudo noise (PN) code, and output one Walsh code to one channel path and the other Walsh code to the other channel path; a first mixer to mix the signals inputted to two channel paths, and generate a spread symbol for each path; a delay to delay the other channel path signal by a predetermined time; and a transmission unit to convert one channel path signal and the other channel path signal delayed by the delay into transmission frequency band signals, and transmit the converted signals as wireless signals.

Apparatus and method for transmitting packet data in wireless sensor network

Provided are an RFID reader and a method for suppressing transmission leakage signals thereof. The RFID reader includes a first loop, a second loop, and a digital signal processor. The first loop suppresses a first transmission leakage signal of an RX signal in response to a first leakage control signal. The second loop suppresses a second transmission leakage signal of the RX signal, received through the first loop, in response to a second leakage control signal. The digital signal processor generates the first leakage control signal and the second leakage control signal. The digital signal processor generates the first leakage control signal until the level of the first transmission leakage signal becomes equal to or lower than the level of a first reference transmission leakage signal.

RFID reader and method for suppressing transmission leakage signal thereof

Provided are a sensor node included in a sensor network, an update server updating the sensor node, and a method of updating a sensor node. The update server updating a sensor node included in a sensor network includes an execution code manager managing execution codes for a plurality of sensor nodes included in the sensor network, a rule generator generating an update rule based on a result of comparing an existing execution code managed by the execution code manager with an update execution code required for a new function update of the sensor node, and a downloader causing the sensor node to download the update rule generated by the rule generator. Accordingly, an execution code can be updated by a small amount of data transmission.

Sensor node included in sensor network, update server updating the same, and method of updating sensor node

Provided is a Radio Frequency Identification (RFID) reader that can minimize collision among RFID readers in an environment where there are a plurality of RFID readers within a limited operating environment by making each RFID reader select a channel at different delay time based on a random value, and a method for controlling operation of the RFID reader. The RFID reader includes a random value generating unit; a reader control unit for adaptively deciding a counter value for generating the random value; an anti-collision unit for preventing collision among a plurality of tags; a reader transmitting unit for generating a reader command message determined by the anti-collision unit, encoding the reader command message, and modulating the reader command message; a reader receiving unit for demodulating and decoding a tag signal; and a channel operation control unit for selecting a channel to be used for the communication with the tag.

Passive RFID reader and operation control method therefor

Disclosed is a Radio Frequency Identification (RFID) tag antenna. The tag antenna includes a lower dielectric substrate and an upper dielectric substrate. The lower dielectric substrate is provided at a lower surface thereof with a ground plane and at an upper surface thereof with two microstrip lines. The microstrip lines each have an open-end, the open ends spaced apart from each other from a middle of the lower dielectric substrate while facing each other to form a radiating slot from which radiation of electromagnetic waves occurs. The upper dielectric substrate is provided at an upper surface thereof with at least one electric capacitive device and is stacked on the lower dielectric substrate. The RFID tag antenna enhances radiation efficiency while achieving miniaturization.

Tag antenna using microstrip line, method of manufacturing the same and radio frequency identification tag

Provided are a Radio Frequency Identification (RFID) tag and apparatus and method for locating a RFID tag without comparing arrival times of blink signals transmitted from the RFID tag in order to quickly trace a location of the RFID tag. The RFID tag includes a tag ID generator configured to generate a tag ID of the RFID tag, a blink generator configured to generate a plurality of sub-blink signals that form the blink signal, a sub-blink ID generator configured to generate sub-blink IDs for the generated sub-blink signals, a sub-blink ID inserter configured to insert the generated sub-blink IDs into the sub-blink signals, and a transmitter configured to transmit the blink signal having the tag ID and the sub-blink IDs.

Apparatus and method for locating RFID tag

Disclosed are a radio frequency identification (RFID) security apparatus and a method thereof. According to the RFID security method, a secure tag reader performs determining an AES key using security information received from a secure tag and generating an output key using the determined AES key, decrypting AES data received from the secure tag using the output key, and encrypting data to be transmitted to the secure tag using the output key and transmitting the data, and a secure tag performs generating an output key using an AES key and security information, and transmitting the security information to a secure tag reader, encrypting data to be transmitted to the secure tag reader using the output key, and transmitting the encrypted data to the secure tag reader, and decrypting data received from the secure tag reader using the output key.

Radio frequency identification (RFID) security apparatus having security function and method thereof

A hybrid virtual multiple-input multiple-output (V-MIMO) transmission method of a management node in a wireless ad-hoc network in which a transmission path from a source node to a destination node is divided into one or more sections is provided. The hybrid V-MIMO transmission method includes obtaining one or more pieces of node information of one or more nodes by transmitting an information request message to the nodes in response to a transmission request message for data transmission from the source node to the destination node; setting a shortest path (SP) from the source node to the destination node based on the obtained node information; determining transmission schemes individually for nodes present on the SP; issuing a transmission preparation request by transmitting the determined transmission schemes to the respective corresponding nodes; and transmitting a transmission start message to the source node in response to transmission ready responses from the respective nodes.

Method and apparatus for hybrid virtual MIMO transmission in wireless ad-hoc network

Growing community of inventors

Daejeon, South Korea

Jong-Suk Chae