Yonsei University

Sk Telecom Company, Ltd.

Lg Electronics Inc.

Samsung Electronics Co., Ltd.

Dae Sik Hong

Min Soo Na

Tak Ki Yu

Han Ho Wang

Sung Ho Moon

Young Lak Kim

Tae Guen Kim

Kwon Jong Lee

Yo Seop Park

Eunsun Kim

Jihyun Lee

Yongho Seok

Gosan Noh

Ji-Haeng Heo

Young Soo Kim

Byoung Hoon Kim

Byeong Woo Kang

Hyun Soo Kim

Chang Soon Park

Hyo Sun Hwang

Sung Soo Park

Tae In Hyon

Junho Jo

Seok Won Lee

Jun Ho Jo

Je Min Lee

Hyung Sik Ju

Go San Noh

Hano Wang

Byeongwoo Kang

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 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

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

Disclosed are a method and device for transmitting and receiving available channel information based on directivity in a wireless communication system. A method for enabling a station (STA) to receive available channel information in a whitespace band according to one embodiment of the present invention comprises the steps of: determining a current position of the STA and a position at which the direction is changed on a moving path of the STA; determining K (K&#x2267;1) operating ranges based on the current position of the STA and the position at which the direction is changed; transmitting a channel availability query (CAQ) request frame for the K operating ranges to a database; and receiving available channel information on the K operating ranges through a CAQ response frame from the database.

Method and device for transmitting and receiving available channel information based on directivity in wireless communication system

The present invention relates to a method of receiving available channel information on K (K&#x2267;2) numbers of locations by a first type station (STA) from a second type STA in a wireless communication system includes: receiving a channel availability query (CAQ) response message, wherein the CAQ response message includes a field of the numbers (K) of the locations and K numbers of available channel list fields configured with information on an available channel list for each of the K numbers of locations, from the second type STA, and performing a communication in a white space using an available channel included in an available channel list for a single location among the K numbers of locations, wherein the K numbers of available channel list fields are configured with a Map ID field and a field of N (N&#x2267;1) numbers of available channels are repeated K times.

Method and apparatus for transceiving a contact verification signal regarding available channels in a plurality of locations in a wireless communication system

A method and apparatus for allocating a frequency resource to each micro User Equipment (UE) in a hierarchical cellular mobile communication system are disclosed. The method includes acquiring information about traffic of each macro UE or a macro BS in a frequency resource allocated to the macro UE or the macro BS, first Signal-to-Noise Ratio (SNR) information about an SNR of a signal from the macro UE or the macro BS, measured at each micro UE and second SNR information about an SNR of a signal from the micro UE, measured at each micro BS, calculating throughput of the micro UE using the traffic information, the first SNR information and the second SNR information, determining a frequency resource to be allocated to the micro UE using information about the calculated throughput and allocating the determined frequency resource to the micro UE.

Apparatus and method for allocating frequency resource to micro UE in a mobile communication system

A main hub, a sub hub, and a sensor node communicating in a wireless body area network (WBAN) including at least one sub hub, and a communication method thereof, are provided. A communication method of the main hub, includes assigning a beacon slot to the sub hub. The method further includes receiving, from the sub hub, a beacon signal based on the beacon slot. The method further includes verifying whether the sub hub includes data to be transmitted to the main hub based on the beacon signal. The method further includes receiving, from the sub hub, the data based on a result of the verification.

Main hub, sub hub, and sensor node communicating in wireless body area network (WBAN) including at least one sub hub, and communication method thereof

A method for selecting a relay station includes enabling a cognitive radio system to receive status information regarding a plurality of candidate relay stations, licensed target stations, and non-licensed target stations, determining an available power threshold value in consideration of the amount of interference affecting the licensed target station and a maximum power value when data is transmitted to the non-licensed target station, and selecting a relay station to be used in transmitting the data in the available power threshold value, in consideration of the status information and the amount of interference.

Method for selecting a relay station

Growing community of inventors

Seoul, South Korea

Dae Sik Hong