Samsung Electronics Co., Ltd.

Inha-industry Partnership Institute

Jae Hak Chung

Tae In Hyon

Jae Myoung Kim

Sang Jo Yoo

Sang-Jo Yoo

Hyun Ju Kim

Tae-In Hyon

Jae Moung Kim

Sung Hwan Sohn

Kyoung Jin Jo

Young Gun Ji

Yang Soo Kwon

A cooperative diversity method and apparatus that can minimize interference and maximize an efficiency of a transmission channel between terminals of a cooperative diversity pair, the method including: determining a pair of terminals to be a cooperative diversity pair according to a spectrum sensing result of a cognitive radio (CR); selecting a subchannel through which data is exchanged between the pair of terminals; and transmitting the data between the pair of terminals through the selected subchannel.

Method and apparatus for managing a cooperative diversity system

A communication method and apparatus for a distributed network system where a cognitive radio (CR) technology is used. A communication method of a distributed network system where the CR technology is used includes transmitting adjacent channel information, from at least one first neighbor node adjacent to a source node, first adjacent channel information of the at least one first neighbor node using a pulse signal according to a request of the source node; by transmitting, from at least one second neighbor node adjacent to a destination node, second adjacent channel information of the at least one second neighbor node to the destination node using a pulse signal according to a request of the destination node; and exchanging data between the source node and the destination node using a channel that is not currently used, according to the transmitted adjacent channel information.

Communication method and apparatus for distributed network system where cognitive radio technology is applied

A communication method and apparatus of a cognitive radio (CR) environment using a relaying system while not interfering with a communication system having a priority right to use a frequency band, the communication method including: listening to fundamental channel (FCH) information and/or downlink/uplink (DL/UL) map information of a frame transmitted in the relaying system; obtaining a transmission signal of the relaying system using the FCH information and/or the DL/UL map information; orthogonally encoding data to be transmitted in the CR environment based on the obtained transmission signal; and transmitting the orthogonally encoded data via a determined channel that is used in the relaying system. Accordingly, aspects of the present invention can retrieve radio resources unused in the CR environment more easily.

Method and apparatus for communicating by use of relaying system in a cognitive radio technique

A method and apparatus of controlling a transmission power of a cognitive radio (CR) environment, the method including: sensing an incumbent user that uses a same channel as the CR environment; detecting signal quality information of the sensed incumbent user; calculating, using the detected signal quality information, a maximum transmission power value that corresponds to a maximum transmission power that may be transmitted by a CR base station in the CR environment; and controlling a communication of the CR environment to be performed within the calculated maximum transmission power value.

Method and apparatus for controlling transmission power of cognitive radio environment

A signaling method between a cognitive radio (CR) base station and a CR terminal in a CR environment, and a channel division method used for the signaling method, includes: detecting a channel usage of an incumbent system, which communicates with a CR base station; sensing an outband channel to communicate with the CR base station; receiving an EOS, which is broadcasted from the CR base station via the outband channel according to a predetermined period; and transmitting a sensing report signal with respect to the channel to the CR base station.

Growing community of inventors

Seoul, South Korea

Jae Hak Chung