Korea Advanced Institute of Science and Technology

Samsung Electronics Co., Ltd.

Woong Sup Lee

Dong Ho Cho

Ho Won Lee

O Hyun Jo

Kyung Hun Jang

Hyo Sun Hwang

Hee Jung Yu

Tae Soo Kwon

Yong Hoon Lee

Young Seok Oh

Ji Hyun Park

Chi Sung Bae

A method of performing relay communication in a next generation cellular communication system is disclosed. The next generation cellular communication system includes a base station and a plurality of terminals, and a communication target terminal which has not acquired a Line-Of-Sight (LOS) channel with the base station performs communication through the relay of a relaying terminal which has acquired a LOS channel. The base station determines the relaying terminal. The relaying terminal forms a relaying terminal group by determining one or more relaying assistant terminals. The communication target terminal forms a transmitting/receiving terminal group by determining one or more transmitting/receiving assistant terminals. The base station performs communication with the relaying terminal through the relaying terminal, relaying assistant terminals of the relaying terminal group and the transmitting/receiving assistant terminals of the transmitting/receiving terminal group.

Relay communication method of next generation cellular communication system

A cognitive radio communication device and method are provided. The cognitive radio communication device includes a reception unit to receive reference signals from a first communication device, a frequency division unit to divide operating frequency bands of the first communication device into a plurality of sub frequency bands, a first sensing unit to sense each of the plurality of sub frequency bands using the reference signals to estimate whether the first communication device uses each of the plurality of sub frequency bands, and to determine an unused frequency band group including at least one sub frequency band not used by the first communication device based on the estimated result, and a transmission unit to transmit data to a second communication device using the sub frequency band included in the unused frequency band group.

Device to sense frequency band to share operating frequency bands in heterogeneous communication systems and method thereof

A cognitive radio-based wireless communication system and an air interface method in a physical layer and a data link layer, which constitute a cognitive radio-based next-generation wireless communication system. The air interface method for wireless communication in the cognitive radio-based wireless communication system of the present invention is provided in the cognitive radio-based wireless communication system including a base station system and a plurality of mobile station systems. The base station system and a certain mobile station system communicate with each other using an overlay method that uses a spectrum hole. The base station system and the mobile station system switch from the overlay method to an underlay method to communicate with each other when a paying user having high priority performs communication using the spectrum hole.

Cognitive radio based air interface method in wireless communication system

Disclosed herein are a system and method for setting up a Peer-to-Peer (P2P) communication group in a cellular system, and a P2P communication system and method using the P2P communication group. The system for setting up a P2P communication group for a terminal in a cellular system including a base station and the terminals includes a location detection unit, a location information transmission unit, a control information reception unit, and a final group setup unit. The location detection unit detects the location of a terminal. The location information transmission unit sends information about the location, detected by the location detection unit, to the base station. The control information reception unit receives information about a preliminary P2P communication group set up by the base station based on the location information. The final group setup unit sets up a final P2P communication group based on the preliminary P2P communication group.

System and method for setting up P2P communication group in cellular system, and P2P communication system and method using P2P communication group

Growing community of inventors

Daejeon, South Korea

Woong Sup Lee