Snu Rdb Foundation

Samsung Electronics Co., Ltd.

Lg Electronics Inc.

Soundlly Inc.

Sung Hyun Choi

Han Byul Seo

Min Soo Na

Hye Won Lee

Seo Shin Kwack

Seon Wook Kim

Young Soo Kim

Byoung Hoon Kim

Young Jun Hong

Tae Hyun Kim

Kyung Hun Jang

Hyun Ho Choi

Bruno Clerckx

Jae Hyun Kim

Kwang Hoon Han

Hui Won Je

Seung Kyu Baek

Young Woo Hwang

Gyu Jin Lee

Jong Hoe Koo

Yeon Chul Shin

A source node includes a topology information extractor configured to acquire information of a channel state between nodes included in a multicast network, and extract topology information of the multicast network. The source node further includes a relay node selector configured to select, from the nodes, a relay node to relay a packet transmitted from the source node, based on the topology information.

Method and apparatus for relaying in multicast network

A method for transmitting sound waves using a time-varying frequency-based symbol includes the steps of: storing waveform data in a digital form; converting the waveform data in the digital form into an analog signal; and outputting the analog signal as sound waves through a speaker. Herein, the waveform data in the digital form includes a symbol the frequency of which changes with time within a sound wave band.

Method for transmitting and receiving sound waves using time-varying frequency-based symbol, and apparatus using the same

Provided is a coordinated communication method and apparatus that may perform coordinated communication based on long-term channel information, for each sub-band. Base stations may exchange scheduling information of each sub-band with each other to determine a priority among the base stations, and may perform rescheduling for each sub-band based on the determined priority. The base stations may obtain the long-term channel information, and thus may reduce overhead occurring with exchanging of information between a base station and a terminal or between base stations, and may decrease damage due to a delay of channel information associated with a terminal.

Method and apparatus for coordinated multi-point communication for each sub-band based on long-term channel state information

A method of controlling uplink access in a wireless communication system is provided. The method includes: generating an access probability sequence consisting of an access probability determined with respect to a radio resource used for data transmission; transmitting data according to the access probability included in the access probability sequence; receiving a success/failure result on the data transmission; and regulating the access probability used in the data transmission according to the success/failure result. Accordingly, each user equipment performs a simple control process for attempting random uplink access according to an access probability sequence and for changing the access probability sequence according to success/failure of uplink data transmission, thereby decreasing a probability of collision between user equipments, thereby increasing data transmission efficiency in a system employing a plurality of user equipments.

Method for controlling uplink access in wireless communication system

A method of allocating uplink resources in a wireless communication system is provided. The method comprises generating a first message which has a preamble and adaptively further includes resource request information based on a communication state with a base station and transmitting the first message to the base station.

Method of allocating uplink resources in wireless communication system

A Cognitive Radio (CR) communication apparatus is provided. The CR communication apparatus may include a determination unit to determine any one of a plurality of Radio Access Technologies (RATs) as a temporary control RAT, an estimation unit to estimate an available resource and a channel state of each common RAT using the temporary control RAT, and a selection unit to calculate an available capacity of each of the common RATs using the available resource and the channel state, and to select an optimum RAT from the common RATs based on the available capacity of each of the common RATs. The common RATs may be used by the CR communication apparatus and a receiving CR communication apparatus from among the plurality of RATs.

Cognitive radio communication apparatus and radio access technology selection method of cognitive radio communication apparatus

Growing community of inventors

Seoul, South Korea

Sung Hyun Choi