Electronics and Telecommunications Research Institute

Samsung Electronics Co., Ltd.

University-Industry Cooperation Group of Kyung Hee University

Yonsei University

Georgia Tech Research Corporation

University of Southern California

Intellectual Discovery Co., Ltd.

Dong Seung Kwon

Young Seog Song

Ji Hyung Kim

Byung-Jae Kwak

Wooram Shin

Seung Joon Lee

Choong Il Yeh

Choongil Yeh

Jihyung Kim

Kwang Jae Lim

Keun Young Kim

Een Kee Hong

In-Kyeong Choi

Chungyong Lee

Jee Hyeon Na

Ji Won Kang

Chung Yong Lee

Min Sik Seo

Jiwon Kang

Jae Seung Lee

Jae Woo Park

Sung Kyung Kim

Jee Yon Choi

Young Hoon Kim

Bong Hyuk Park

Moon Sik Lee

Jee Hwan Ahn

Jung Hyun Kim

Ik Jae Chun

Anseok Lee

Seung-Hwan Lee

Seung Hyun Jang

Kyung Sook Kim

Hoo Sung Lee

Hyun Jae Kim

Dong Hyun Ahn

Ji Hung Kim

Een-Kee Hong

Young Jin Moon

Yoon Ju Lee

Gyung Chul Shin

Bum-Soo Park

Jin-Woo Kim

Hyun Jin Kim

Kyung Soo Kim

Jung-Hyun Kim

Nam Hoon Park

Youn Ok Park

Hooman Shirani-Mehr

Steven W McLaughlin

Chung Gu Kang

Jae Su Song

Giuseppe Caire

Hyun-jae Kim

Seung Jae Bahng

Ji Hye Park

Jung Mo Moon

Dae Ik Kim

Eun Seon Cho

Byung Han Ryu

Chan Yong Lee

Se-Jin Kim

Demijan Klinc

Yunhee Cho

In Sook Park

Hong-Yeop Song

Hyeon Ju Oh

Joondoo Kim

Hye Kyung Jwa

Nam Sik Ryu

Junyoung Son

Meong-Hun Lee

Chulho Kim

Young-Kyun Cho

Hyung Jong Yang

Mu Yong Shin

Joon Doo Kim

Ju Hyup Kim

Eun Hyung Cho

Jee Hwan Noh

David Gesbert

Rong Ran

Joon-doo Kim

Jongpil Seo

Jaehak Chung

Hyunsoo Kim

Bonghyuk Park

Min-Seok Jang

Ju-Hyup Kim

Joo Sun Bang

Mi-Young Nam

Ye Ok Jang

A method and apparatus for wireless communication in a wireless personal area network (WPAN) communication system. A wireless communication method to be performed by a first wireless communication device includes broadcasting a beacon, receiving an association request signal from a second wireless communication device receiving the beacon, and performing association with the second wireless communication device after receiving the association request signal, in which the first wireless communication device may suspend beacon transmission after the association with the second wireless communication device is established.

Method and apparatus for communicating in wireless personal area network communication system

A data transmission method and apparatus initialize an index of a modulation and coding scheme (MCS) for transmitting data to a terminal, adjust the index of the MCS based on at least one of a hybrid automatic repeat request (HARM) feedback of the terminal and a channel quality of the terminal, and transmit the data to the terminal based on the adjusted index of the MCS.

Method and apparatus for transmitting data

A vertical positive-intrinsic-negative (pin) diode includes a semiconductor substrate in which a P-type region, an intrinsic region, and an N-type region are sequentially disposed in a vertical direction to be formed therein, a first electrode formed on one surface of the semiconductor substrate to be in electrical contact with the P-type region, and a second electrode formed on the other surface of the semiconductor substrate to be in electrical contact with the N-type region, wherein the P-type region and the N-type region are respectively disposed in an upper portion and a lower portion of the semiconductor substrate to be opposite to each other.

Vertical pin diode

A method and apparatus for close-proximity communication. The close-proximity communication method performed by a transmitter includes generating a physical layer (PHY) frame including a PHY preamble, a frame header, and a payload field, and transmitting the generated PHY frame to a receiver, in which the frame header may include a media access control (MAC) header, a header check sequence (HCS), and a Reed-Solomon (RS) parity bit.

Method and apparatus for close proximity communications

Disclosed are a method and an apparatus that reflect the quantity of wireless resources allocatable to a user terminal in a scheduling target cell to calculate the quantity of available wireless resources for quality of service (QoS) requirements for each kind of varied traffic of user terminals and a metric having a flexible weight for the QoS requirements and support efficient wireless resource scheduling among the user terminals.

Method and apparatus for wireless resource scheduling with guaranteed QoS in mobile communication system

Provided is a method of allocating a resource in a small cell system. The method includes: selecting a temporary base station for each user terminal; measuring a signal-to-noise ratio (SNR) through a downlink pilot in a small cell base station; transmitting the signal-to-noise ratio measured for each user terminal to the temporary base station; receiving base station selection and resource allocation information from the small cell base station; and selecting the small cell base station to which most frequency resource block are allocated as a home base station.

Small cell system and method for allocating resource thereof

The present invention relates to a central office device, a remote site device, and a communication method thereof that can be used in a radio over fiber (RoF) technique. Provided are a central office device and a communication method thereof that convert an analog signal into a signal having a carrier with an intermediate frequency and converts the converted signal into a digital signal to transmit the converted digital signal to a remote site device. Provided are a remote site device and a communication method thereof that filter a digital signal having a carrier with an intermediate frequency to easily induce a corresponding analog signal.

Central office device, remote site device, and communication method thoseof

Provided is an apparatus for adjusting an envelope signal delay in an envelope-tracking power amplifier. The apparatus includes: an envelope signal providing unit configured to provide an envelope signal; a variable negative group delay unit configured to adjust a group delay of the envelope signal received from the envelope signal providing unit and output the adjusted envelope signal; an envelope modulator configured to modulate the envelope signal outputted from the variable negative group delay unit; a group delay difference detecting unit configured to detect a group delay difference between the envelope signal which is outputted from the envelope signal providing unit and the envelope signal which is outputted from the envelope modulator; and a control signal generating unit configured to generate a control signal to control a group delay value of the variable negative group delay unit according to the group delay difference.

Apparatus and method for adjusting envelope signal delay in envelope-tracking power amplifier

Disclosed are a method and apparatus for managing a cloud virtual base station system. The present invention includes setting initial resources and driving or downloading an execution file or environment file of the cloud virtual base station system and monitoring or managing a state for a failure, radio resources, or the execution file or the environment file of the cloud virtual base station system.

Method and apparatus for controlling cloud virtual base station

Disclosed is a base station that performs coordinated communication with a plurality of remote radio heads (RRHs), including: a communication unit receiving source signals from the plurality of remote radio heads; a measurement unit measuring signal intensities and delay times of the respective source signals; a selection unit selecting remote radio heads that will perform the coordinated communication among the plurality of remote radio heads based on the signal intensities and the delay times; and a demodulation unit demodulating source signals received from the selected remote radio heads.

Wireless communication apparatus and method for selecting a group of coordinated communication nodes based on signal intensities and delay times of source signals

Disclosed is a cellular communication system allowing direct communication between terminals within a cell or simultaneous transmission and reception of signals between a base station and the terminals through a repeater to be made by introducing a universal link, and a communication method thereof. The communication method of the cellular communication system includes: transmitting, by a base station, universal link setting information and a transmission control signal to a first terminal within a cell, transmitting, by the base station, the universal link setting information and a reception control signal to a second terminal within the cell, and directly transmitting/receiving, by the first and second terminals, signals through the universal link.

Cellular communication system allowing, by using a universal link, direct communication between terminals or simultaneous transmission and reception of signals between a base station and the terminals

A method and an apparatus for controlling a femtocell base station which can effectively solve an inter-cell interference problem. A method of controlling a femtocell base station according to an exemplary embodiment includes receiving pilot signals from one or more macro cell base stations located in surroundings of a femtocell and measuring intensities of pilot signals, receiving use frequency information and pilot signal transmission power information from one or more macro cell base stations, determining a position of a femtocell within a reference macro cell according to an intensity of a reference pilot signal having a maximum signal intensity among received pilot signals, determining a use frequency of a femtocell according to a position of a femtocell, and determining a transmission power of a femtocell according to use frequency and an intensity of a reference pilot signal of a femtocell.

Method and apparatus for controlling femtocell base station

In a mobile wireless network system including a plurality of nodes communicating with each other, a node attempting to transmit data finds useable resources through performing carrier sensing on packet data unit (PDU) slots and transmits data through the found resources. A node attempting to receive data finds useable resource through performing carrier sensing on acknowledge (ACK) slots and receives data through the found resources.

Method and apparatus for transmitting/receiving in mobile wireless network

The embodiments of the present invention are directed to a method and apparatus that synchronize radio nodes using preambles in a radio communication system. An embodiment of the present invention relates to a method of transmitting preambles by a radio node. The method includes generating a first preamble indicating a system bandwidth and a carrier configuration, generating a second preamble indicating a segment identifier used for obtaining a node identifier, allocating the first preamble to a first preamble carrier set, allocating the second preamble to a second preamble carrier set corresponding to the segment identifier, and transmitting the first preamble to a receiving node through the first preamble carrier set and the second preamble to the receiving node through the second preamble carrier set.

Method for transmitting preamble, synchronization method of wireless node and apparatus thereof

In a mobile wireless network system including a plurality of nodes, available resources of a transmitting node and available resources of a receiving node are searched for. Commonly overlapped allocatable resources among available resources of a transmitting node and available resources of a receiving node are searched for, areas corresponding to the calculated allocation resource number according to an allocation condition that is set in the allocatable resource area are selected, and the areas are allocated to the transmitting node or the receiving node.

Method and apparatus for allocating resource in mobile wireless network

Growing community of inventors

Daejeon, South Korea

Dong Seung Kwon