Samsung Electronics Co., Ltd.

Sk Telecom Company, Ltd.

Yonsei University

Korea Advanced Institute of Science and Technology

Tak Ki Yu

Sang Min Lee

Min Soo Na

Yung Soo Kim

Sung Ho Moon

Young Lak Kim

Han Ho Wang

Tae Guen Kim

Dae Sik Hong

Tae Hyung Kim

Soo Yong Choi

Kyung Sik Min

Kwon Jong Lee

Yo Seop Park

Hyun Soo Kim

Dong Won Lee

Jong Hyung Kwun

Chan Ho Min

Young Hyun Jeon

Bang Chul Jung

Hyu Dae Kim

A base station controller optimally controls activation/deactivation of small base stations in a heterogeneous network environment in which a number of base stations forming cells of different sizes coexist in the same area, taking into account traffic volume as well as signal interference. A method for operating the base station controller is also disclosed.

Base station management apparatus and control method thereof

A method for mitigating interference at a small base station in a hierarchical cell structure is provided. In the method, the small base station checks a sub-frame allocated to macro user equipment by using a downlink signal received from a macro base station when an interference candidate user equipment list is received. The interference candidate user equipment list contains information on the macro user equipment adjacent to a femto cell controlled by the small base station. Then the small base station allocates other sub-frame to femto user equipment located in the femto cell by avoiding the sub-frame allocated to the macro user equipment.

Communication system and method for mitigating interference in hierarchical cell structure

A base station device of blanking a radio resource, includes: a base station selecting circuit to select a specific adjacent base station for coordinated multi-point (CoMP) transmission and reception; a CoMP transmission and reception control circuit to blank out the radio resource which is allocated equally as the radio resource, which is allocated by the specific adjacent base station for a terminal which receives the CoMP transmission and reception from the base station device and the specific adjacent base station; and a resource allocation information sharing circuit to share resource allocation information, which represents that the radio resource is blanked out, with other adjacent base stations except for the specific adjacent base station, such that the other adjacent base stations are capable of using the resource allocation information.

Base station device for blanking radio resource of multi point communication in heterogeneous network and method for operating same

A base station device includes: a signal receiving unit to receive a downlink signal, which is transmitted from an adjacent base station over a downlink frequency band of a frame for the adjacent base station, over an uplink frequency band of a silent inverted frame during a first time interval, during which the base station device uses the silence inverted frame; a measuring unit to measure a channel environment with the adjacent base station based on the downlink signal from the adjacent base station; and an interference removing unit configured to remove the signal interference induced from the adjacent base station by removing the downlink signal received from the adjacent base station over a uplink frequency band of the base station device during a second time interval based on the channel environment with the adjacent base station.

Base station device, method for operating same, and terminal device

Disclosed is a terminal device that is capable of taking an advantage of increasing transmission capacity in the FD transmission as much as possible by selectively using the FD transmission or the HD transmission in a multi-cell communication environment in consideration of a relationship with other neighboring nodes (base stations and terminals). Also disclosed is a method of operating the terminal device.

Terminal device and method for operating terminal device

The present invention suggests a cell management apparatus and a method for operating a cell management apparatus, capable of harmoniously satisfying effects of improving intercell interference and enhancing operation efficiency of radio resources in managing virtual cells, particularly in managing virtual cells in a heterogeneous network environment in which cells having different sizes coexist.

Cell management apparatus and method for operating cell management apparatus

A cell control device achieves optimal interference control taking into account a different between the DL interference strength and the UL interference strength by an adjacent cell by way of controlling cells based on D-TDD in a network environment where a number of cells employing TDD coexist. A method of operating a cell control device is also disclosed.

Cell control device and operation method therefor

The present disclosure relates a terminal device capable of enhancing cell throughput in consideration of an interference environment created in a heterogeneous network environment where cells of different sizes which use different frequency bands coexist, and a method of operating the same.

Terminal device and operating method of terminal device

The present invention discloses a base station control device which controls the base station management and the carrier aggregation (CA) function according to a heterogeneous network environment, such that an optimum system throughput can be obtained in the heterogeneous network environment through the CA function, and an operating method of the base station control device.

Base station control device and method for operating same

The invention relates to a data transfer method in a multi-hop relay system. The data transfer method comprises: a step for allowing a base station to receive from a first terminal the channel information (H) between the base station and the first mobile station, a step for making the base station generate an interference cancellation precoding matrix using H, a step for forcing the base station to transfer first data to a relay station, and a step for making the relay station transfer the first data to the first mobile station and forcing the base station to transfer second data to a second mobile station, wherein the second data is converted using the interference cancellation precoding matrix. According to the disclosed data transfer method in the multi-hope relay system, the base station transfers data to another mobile station efficiently when the relay station transfers data to a mobile station. Therefore, the data transfer method is able to efficiently use the resources wasted in an existing data transfer method and improve the total data transmission rate of the base station.

Growing community of inventors

Yongin-si, South Korea

Tak Ki Yu