Lg Electronics Inc.

Yonsei University

Industry-University Cooperation Foundation Sogang University

Jun-Ho Jo

Byoung-Hoon Kim

Jaewon Kim

Jaewon Chang

Dong-Uk Lee

Wonjin Sung

Jae-Won Lim

Seo-Woo Jang

Ki Jun Kim

Dae-Sik Hong

Seong-Lyun Kim

Seung-Woo Ko

Young-Ju Hwang

Yong-Ho Seok

Suck-Chel Yang

Go-San Noh

Han-Ho Wang

A method for managing radio resource of a femto cell includes: providing, by the femto cell, a service to one or more UEs by using most of pre-set radio resource; receiving measurement results from the one or more UEs; determining whether or not one or more neighbor femto cells are closely located nearby based on the measurement results; and if it is determined that neighbor femto cells are closely located nearby, reducing the pre-set radio resource into a small radio resource and providing a service with the small radio resource.

Femto base station and method for managing resource thereof

The present invention relates to an apparatus and method for arbitrating radio resources between femto base stations in which, when handover of a terminal takes place between femto base stations, the handover is carried out by reallocating radio resources of a serving femto base station assigned to the terminal to a target femto base station, to rearbitrate the radio resources and reduce the time required for rearbitration, thereby enhancing communication effectiveness.

Method and apparatus for reassigning frequency resource in a femto base station during handover

Disclosed is a method for relaying data in a multi-hop cellular system, the method including receiving by a terminal from a base station a notification as to whether the terminal is decided as a candidate for a relay, deciding by the terminal whether to be a representative candidate terminal for the relay according to a channel state with the other terminals within a coverage of the base station if the terminal is decided as the candidate for the relay, sending by the terminal to the base station a notification if the terminal is decided as the representative candidate terminal, and relaying data received from the other terminals to calculate relay probability terminals to the base station if the terminal is notified from the base station as to that the terminal is finally decided as the relay.

Method for relaying data in multi-hop cellular system

Disclosed are a method and apparatus capable of enhancing a closed loop multi-input multi-output (MIMO) capacity through distributed discrete power control in the case of cooperatively transmitting information to multiple users through a downlink.

Method and apparatus for data transmission based on distributed discrete power control in cooperative multi-user multi-input multi-output system

Disclosed are an apparatus and method for determining a frame structure for reducing interference between users using the same frequency band in a communication system using a cognitive radio, the method including, collecting channel status information related to a primary user with a priority to occupancy of a predetermined frequency band, executing spectrum sensing for the frequency band to check whether the primary user's traffic exists, deciding a length of a data frame to be transmitted in consideration of interference to the primary user based upon the collected channel status information if a channel in which the primary user's traffic is not present is sensed through the spectrum sensing, constructing a data frame based upon the decided frame length to transmit via the sensed channel, and re-executing the spectrum sensing for the channel, if data to be additionally transmitted exists, and rechecking whether the primary user's traffic is present.

Apparatus and method for determination of frame structure for reducing interference in frequency reuse system using cognitive radio

Disclosed is a method for receiving data in a Multi Input Multi Output (MIMO) system, the method comprising: decoding data transmitted from a transmitter by using one beam-forming vector included in a codebook that beam-forming vectors are formed in a hierarchical structure according to at least one of change directions of radio channels, the number of channel change directions, and a change rate; determining whether to update the beam-forming vector based on the radio channel changes; selecting other beam-forming vector included in the codebook having a hierarchical structure when it is determined that update for the beam-forming vector is required; feed-backing information about an index indicating where the selected beam-forming vector is located in the hierarchical structure of the codebook to the transmitter; and decoding data received from the transmitter by using the selected beam-forming vector.

Method for receiving data in multi input multi output

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Gyeonggi-do, South Korea

Jun-Ho Jo