Lg Electronics Inc.

Electronics and Telecommunications Research Institute

Korea Advanced Institute of Science and Technology

Semisysco Co., Ltd.

Jae-Hoon Chung

Jae-Won Chang

Jin-Young Chun

Bin-Chul Ihm

Hyun-Soo Ko

Ja-Ho Koo

Hee-Soo Lee

Dan-Keun Sung

Sung-Ho Moon

Moon-Il Lee

Yeong-Hyeon Kwon

Jin-Hyuk Jung

Jae-Kyun Kwon

Seog-Ill Song

Seo-Young Lee

Jae-Sang Cha

Wook-Bong Lee

Jae-Joon Kim

Ju-Phil Cho

In-Soo Sohn

Mun-Geon Kyeong

Su-Won Park

Soo-Mee Park

Ji-Young Yun

Seong-Jin Choi

Byoung-Chan Park

Bong-Joo Woo

Soon-Jong Lee

Kang-Soo Shin

Seung Hee Lg R&D Complex Han

Seog-Iii Song

The present invention provides a method which determines an adjacent cell to carry out a coordinate multipoint transmission (CoMP) operation instead of performing the CoMP operation for all adjacent cells, in cases where precoding matrix indexes (PMI) of adjacent cells are limited to prevent interferences by adjacent cells in a multi-cell environment, thereby effectively reducing inter-cell interferences without causing an overhead.

Method and apparatus for determining cell for executing comp in multi-cell environment

The present invention relates to a method and an apparatus for data communication through a Coordinated Multi-Point Transmission in a multiple cell environment. According to the present invention, the data communication method through a coordinated multi-point transmission in a multiple cell environment including a serving base station and a cooperative base station for performing a coordinated multi-point transmission comprises the steps of: receiving data from the serving base station and the cooperative base station through a downlink channel; and demodulating the received data. Each datum transmitted from the serving base station and the cooperative base station includes a predetermined Reference Signal and a data Resource Element, and a Transmit Diversity is applied to the data resource elements of both the serving base station and the cooperative base station through Pairing.

Method and apparatus for data communication through a coordinated multi-point transmission

The present invention relates to a method for synchronizing multiple cells, which perform cooperative multi-input multi-output operations, as well as to a method for inter-cell synchronization in a multi-cell environment, comprising the steps of: measuring a propagation delay of a cooperative base station; transmitting the measured propagation delay to a serving base station; and receiving data for cooperative multi-input multi-output operations in which a transmission location is adjusted, on the basis of the propagation delay of the cooperative base station, when the serving base station transmits the propagation delay to the cooperative base station.

Method and apparatus for inter-cell synchronization in a multi-cell environment

A system and a method of measuring irregularity of a glass substrate using only a reflection light reflected by an upper surface of reflection lights reflected by the upper surface and a lower surface of the glass substrate are disclosed. The system includes a light source section configured to output a first light to the glass substrate and a screen. Here, the first light outputted from the light source section is reflected by an upper surface and a lower surface of the glass substrate, a first reflection light reflected by the upper surface of the glass substrate is inputted into the screen, a first line is formed on the screen in accordance with the input of the first reflection light, a second reflection light reflected by the lower surface of the glass substrate is inputted into the screen through the upper surface, a second line is formed on the screen in accordance with the input of the second reflection light, and the light source section and the screen are disposed on the basis of the glass substrate so that the lines are separated.

System and method of measuring irregularity of a glass substrate

This invention is concerned with a transmission control method and apparatus in a collision interval for a collision of multidimensional hopping patterns. In the present invention, each orthogonal wireless resource in the coordinate of the multidimensional orthogonal resource can hop according to the hopping pattern negotiated between a transmitter and a receiver, and each corresponding channel is distinguished by the hopping pattern. A specific multidimensional hopping pattern is allocated to each secondary station. The hopping pattern is either permanently allocated to the secondary stations or temporarily allocated from the primary station during a call set-up. The permanent allocation of the hopping pattern to the secondary stations is achieved when the hopping pattern is identified based on a unique identifier, such as ESN of the secondary station. The hopping patterns of the secondary stations are mutually independent so that the coordinates of the same orthogonal resource is allocated to different secondary stations in a simultaneous manner in a specific moment. Through this invention, in order to improve the performance of the multidimensional resource hopping multiplexing system, refining transmission and perforation mechanisms for the collisions of multidimensional resource hopping patterns can reduce the overall perforation probability.

Digital communication method and system

Growing community of inventors

Gyeonggi-do, South Korea

Jae-Hoon Chung