Electronics and Telecommunications Research Institute

Korea Advanced Institute of Science and Technology

Korea Kumho Petrochemical Co., Ltd.

Hyung Jin Kim

Sung Cheol Chang

Seong Chul Cho

Soojung Jung

Seungkwon Cho

Gweon Do Jo

Seokki Kim

Sung Kyung Kim

DongSeung Kwon

Hyun Jun Lee

Chanho Yoon

Yeong Jin Kim

Jin Up Kim

Dae Ho Kim

Daeho Kim

Ji Yeon Kim

Jae Su Song

Sung Woo Choi

Jihoon Choi

Dae Won Kim

Hyunsu Kim

Seok Seo

Jung Hoon Oh

Dae Sik Kim

Jung Jin Lee

Ho Soo Kim

Yun Hee Cho

Sup Joo Lee

Jun Yong Noh

Young Hui Kim

Roger Blanco Ribera

Jimin Bae

Joon Hee Jung

A random access preamble detection method of a base station includes removing a cyclic prefix (CP) from a received signal, detecting a plurality of first symbols corresponding to a plurality of first subcarriers included in an uplink available resource from the received signal with the CP removed, measuring reception power of the first symbol corresponding to each of a plurality of second subcarriers allocated to a random access channel among the plurality of first subcarriers, accumulating reception power with respect to each of the plurality of second subcarriers according to a predetermined frequency hopping pattern, and upon completely accumulating reception power according to the frequency hopping pattern, detecting a preamble sequence using each accumulated value of reception power of each of the plurality of second subcarriers.

Timing estimation method of random access preamble, random access preamble detection method, and random access preamble detection apparatus

A communication method in a peer aware communication system and an apparatus for transmitting/receiving using the communication method are provided. A block signal for informing of channel occupation is generated and then is transmitted through an interval in which a message signal including a preamble signal is not transmitted. A subcarrier for the block signal is different from a subcarrier for the preamble signal.

Communication method for preventing signal collision in peer aware communication system and apparatus for transmitting/receiving using the method

A thermoplastic resin composition including 10 to 35 wt % of a first graft copolymer resin in which 55 to 65 parts by weight of a diene-based rubber polymer and 35 to 45 parts by weight of a monomer mixture, in which an aromatic vinyl monomer and a vinyl cyanide monomer are mixed in a weight ratio of 60 to 80:20 to 40 respectively, are graft-polymerized, 10 to 30 wt % of a first copolymer resin in which an aromatic vinyl monomer and a vinyl cyanide monomer are copolymerized in a weight ratio of 60 to 80:20 to 40 respectively, 30 to 75 wt % of a polycarbonate resin, and 2 to 8 wt % of a conductive filler.

Eco-friendly thermoplastic resin composition having excellent electro-plating property

A receiving device and method using a single RF chain includes a reception antenna module radiating a plurality of orthogonal beam patterns to receive a signal, a single RF chain processing a reception signal from the reception antenna module, a signal component extracting unit extracting a reception signal component corresponding to each beam pattern using the reception signal received through the reception antenna module and the single RF chain and a code value previously allocated to the plurality of beam patterns, and a beam pattern controller controlling a beam pattern radiated by the reception antenna module.

Receiving device and method using single RF chain

Disclosed are a method and a terminal for a distributed access. The terminal maps data channels to be allocated in a plurality of data channels included in a frame and map scheduling priorities. In this case, the terminal determines positions of resources of a first message as a resource request message and a second message as a response message for the first message in the first channel.

Method and terminal for distributed access

Disclosed herein are a cooperation MIMO transmitting/receiving method and a terminal for supporting the same. A master terminal forms a slave terminal and a cluster performing cooperation communication. The master terminal transmits some data of data to be transmitted to a slave terminal and shares the some data with the slave terminal, and the slave terminal transparently transmits data transmitted from the master terminal to a target node.

Cooperation multi-input multi-output transmitting/receiving method and terminal for supporting the same

A D2D direct communication method is provided. The device sets at least one frame among a plurality of frames included in a superframe to a frame typewhich is sectionized into a synchronization region for performing a synchronization procedure, a discovery region for discovering devices, a peering region for a connection, and a data region for scheduling of resources and data transmission. The device sets remaining frames among the plurality of frames to a frame typewhich is sectionized into the synchronization region and the data region.

Method and apparatus for device-to-device direct communication

A discovery method is provided by a device in a D2D direction communication. The device selects a discovery resource unit from among discovery resource units which are not being used after listening during one or more discovery resource periods. The device transmits a first discovery signal through the selected discovery resource unit in a broadcasting manner at a first discovery resource period, and transmits a second discovery signal through the selected discovery resource unit in a query-based manner at a second discovery resource period.

Discovery method and apparatus in device-to-device direct communication

A discovery signal that a first device joining in direct communication broadcasts through a radio channel is provided. The discovery signal includes a first field representing whether the discovery signal is a signal for discovering a device or a signal for discovering a service, and a second field including one of device identifier information of the first device and service information of a service that the first device provides according to a value of the first field.

Discovery signal transmitted in direct communication system, and method of transmitting/receiving the discovery signal

The present disclosure relates to a method and system for creating a dynamic floating window for stereoscopic contents, and more particularly, to a method and system for automatically creating a dynamic floating window for stereoscopic contents based on feature points.

Method and system for creating dynamic floating window for stereoscopic contents

A synchronization signal transmitting apparatus generates a plurality of different primary synchronization signals that are transmitted in an ultra frame unit within one super ultra frame and generates one secondary synchronization signal that is transmitted in a frame unit within one super ultra frame.

Apparatus and method for transmitting synchronization signal

A synchronization method by a device is provided in a device-to-device direct communication. The device receives synchronization signals from a plurality of other devices at a current frame, and estimates a synchronization time at a next frame based on the synchronization signals received from the other devices.

Synchronization method and apparatus in device-to-device direct communication

A method in which a transmitting terminal included in an talk-around direct communication (TDC) network transmits data includes: determining a data frame for transmitting the data; requesting to reserve a data transmission segment included in the data frame through a transmission request segment included in the data frame; receiving a response signal transmitted in a transmission response segment included in the data frame; and analyzing the response signal and transmitting the data through the data transmission segment.

Method of transmitting and receiving data in talk-around direct communication network

Provided is a base station. The base station includes a transceiver, a frequency allocation unit, and an orthogonal code allocation unit. The transceiver communicates with a terminal. The frequency allocation unit allocates a frequency resource to the terminal through the transceiver. The orthogonal code allocation unit generates an orthogonal code index table including a plurality of orthogonal code combinations, and allocates one of the orthogonal code combinations included in the orthogonal code index table to each terminal, to which the frequency resource has been allocated for a service request of the terminal, through the transceiver not to multiply be allocated. At least one of a plurality of orthogonal codes included in the orthogonal code combination is orthogonal to at least one of a plurality of orthogonal codes included in an orthogonal code combination allocated to another terminal.

Base stations and resource allocation methods thereof

Provided is a method and apparatus for managing a web based service account. The web based service account management apparatus may select, from among web based service accounts, an account undesired to be exposed to others, and may display an account set with a hiding indication only when a user authenticated through a user authentication process desires to read the account.

Growing community of inventors

Daejeon, South Korea

Hyung Jin Kim