Abstract:
PURPOSE: A transmission power allocation method of nodes is provided to maximize sum rate of a system when nodes constituting a two-way relay system and transmission power resources is limited. CONSTITUTION: A first channel gain about a first channel formed between a first node and a relay is compared with a second channel gain about a second channel formed between a second node and a relay(S220). When the first channel gain exceeds the second channel gain, the first transmission power of the first node, and the second transmission power of the second node, and the third transmission power of the relay are determined so that a first data transmission rate exceeds a second data transmission rate, the first data transmission rate and a third data transmission rate are same, and the sum rate of the two-way relay system is maximized(S230).
Abstract:
A system for generating space frequency block coded relay signal and a method thereof are provided to achieve a high speed data transfer rate and to maintain a small size of a transmitter such as a mobile terminal. A signal detection unit(310) receives a first source signal and a second source signal transmitted from a first source node and a second source node. The signal detection unit detects a received signal. Based on the received signal, a relay signal generator(320) uses an SFBC(Space Frequency Block Code) scheme. The relay signal generator generates a relay signal cooperating with the first source signal and the second source signal. The signal transmission unit(330) transmits the relay signal to a target node.
Abstract:
무선네트워크에서의송신전력을제어하는방법및 장치가제공된다. 대상기지국은이웃기지국과협력적으로송신전력을제어함으로써대상단말들의서비스품질에대한만족도를향상할수 있다. 그리고대상기지국은대상단말들의서비스품질에대한만족도의향상필요여부에따라이웃기지국과협력적으로송신전력을제어할지여부를결정할수 있다.
Abstract:
겹치는무선자원을이용하여업링크통신및 다운링크통신을수행하는통신시스템이제공된다. 통신시스템은서로겹치는무선자원을이용하여업링크통신및 다운링크통신을수행한다. 이때, 적어도하나의업링크단말로인해적어도하나의다운링크단말에는간섭이발생할수 있으며, 적어도하나의업링크단말및 적어도하나의다운링크단말은전송률분할기법및 간섭제어기법을이용하여상기간섭을적절히처리할수 있다. 뿐만아니라, 기지국의적어도하나의전송안테나와적어도하나의수신안테나사이의간섭은에코제거기법을통해처리될수 있다.
Abstract:
계층-셀통신시스템또는다중-셀통신시스템에서사용자스케쥴링및 송신전력제어방법및 상기방법을위한장치가제공된다. 계층-셀통신시스템또는다중-셀통신시스템에서여러셀들사이에간섭이발생할수 있으며, 이러한간섭은여러셀들각각의송신전력을적절히조절함으로써제어될수 있다. 이때, 여러셀들각각은대응하는송신전력의비용을기초로최적의송신전력을찾을수 있다. 그리고, 여러셀들은여러사용자들을서빙할수 있으며, 최적의사용자스케쥴링방법이제안된다.
Abstract:
레이트스플리팅기법을사용하는멀티셀통신시스템및 상기멀티셀통신시스템을위한전송프레임이개시된다. 멀티셀환경에서매크로기지국과펨토기지국의채널정보를기초로레이트스플리팅수행여부를결정할수 있다. 그리고채널정보를바탕으로전송할메시지의파워또는대역폭을할당할수 있다. 멀티셀환경에서의단말은기지국으로부터맵 정보를수신하여디코딩함으로써어느기지국이레이트스플리팅을수행하였는지알 수있다.