Abstract:
겹치는무선자원을이용하여업링크통신및 다운링크통신을수행하는통신시스템이제공된다. 통신시스템은서로겹치는무선자원을이용하여업링크통신및 다운링크통신을수행한다. 이때, 적어도하나의업링크단말로인해적어도하나의다운링크단말에는간섭이발생할수 있으며, 적어도하나의업링크단말및 적어도하나의다운링크단말은전송률분할기법및 간섭제어기법을이용하여상기간섭을적절히처리할수 있다. 뿐만아니라, 기지국의적어도하나의전송안테나와적어도하나의수신안테나사이의간섭은에코제거기법을통해처리될수 있다.
Abstract:
레이트스플리팅기법을사용하는멀티셀통신시스템및 상기멀티셀통신시스템을위한전송프레임이개시된다. 멀티셀환경에서매크로기지국과펨토기지국의채널정보를기초로레이트스플리팅수행여부를결정할수 있다. 그리고채널정보를바탕으로전송할메시지의파워또는대역폭을할당할수 있다. 멀티셀환경에서의단말은기지국으로부터맵 정보를수신하여디코딩함으로써어느기지국이레이트스플리팅을수행하였는지알 수있다.
Abstract:
복수의 릴레이 단말들을 이용하여 시간-공간 블록 코드 기법 기반 데이터를 중계하는 중계 방법이 개시된다. 일 실시예는 소스 단말들 및 데스티네이션 단말들 사이의 간섭 채널 매트릭스들에 기초하여 유효 간섭 채널 매트릭스를 생성하고, 유효 간섭 채널 매트릭스의 널 스페이스를 나타내는 기준 매트릭스를 계산하며, 소스 단말들 및 데스티네이션 단말들 사이의 채널 매트릭스들에 기초하여 유효 채널 매트릭스를 생성하고, 유효 채널 매트릭스 및 기준 매트릭스에 기초하여 릴레이 단말들을 위한 빔포밍 매트릭스들을 생성하는 단계들을 포함한다.
Abstract:
PURPOSE: A communication method of a neighbor terminal and a target terminal is provided to supply a signal or interference component to a target terminal using a random access method or a scheduling method and to increase signal quality of a target terminal. CONSTITUTION: A neighbor terminal determines whether to cooperate with one or more target terminals(210). The neighbor terminal receives a cooperative group subscription request from a target terminal(220). The neighbor terminal requests registration to the target terminal(230). The neighbor terminal performs cooperative communication with one or more target terminals based on registration information(270).
Abstract:
PURPOSE: An uplink multiuser interference alignment system and a method thereof are provided to eliminate the effect of interference which macro terminals transmits to pico base station. CONSTITUTION: A channel matrix generator(810) generates a channel matrix. A beam forming vector generator(820) generates transmission beam forming vectors for a pico terminal(800) and for a macro terminal(860,870). A transmitting unit(830) transmits the transmission beam forming vectors to the pico terminal and the macro terminal, respectively. A receiving unit(840) receives a first data stream and a second data stream from the pico terminal and the macro terminal, respectively.
Abstract:
PURPOSE: A method for offering an advertisement to a terminal which is connected to a femto base station is provided to establish a broadcast channel section in order to recognize a femto cell within a macro cell of a downlink broadcast channel. CONSTITUTION: A terminal recognizes one or more accessible femto base station among femto base station within a broadcast channel section in order to recognize a femto cell of a macro cell. The macro base station receives the request for the neighboring femto base station information and the location information of the terminal(320). The base station creates the information of the neighboring femto base stations based on the location information of the terminal(330). The base station transmits the information about femto base stations and the femto base station list around the terminal(340).