Abstract:
제1 단말은, 제1 TA 값을기지국으로부터수신한다. 상기제1 단말은상기제1 TA 값에기초해구해진제2 TA 값을 SA 신호에포함시킨다. 상기제1 단말은, 상기 SA 신호를, 셀룰러통신에서상기기지국의하향링크신호를수신하기위한 DL(Downlink) 타이밍에, 제2 단말에게전송한다. 그리고상기제1 단말은, 상기 D2D 통신을위해설정되는 CP(Cyclic Prefix)의길이와상기셀룰러통신을위해설정되는 CP의길이가다른경우에, 상기 DL 타이밍에상기제2 TA 값을적용하여구해진제1 타이밍에서, 상기 D2D 통신의데이터를상기제2 단말에게전송한다.
Abstract:
단말과 적어도 두 개의 기지국 사이의 이중 연결을 지원하는 무선통신 시스템에서, 단말이 상향링크 스케줄링 정보 및 서브프레임의 유형에 관한 정보를 바탕으로 상향링크 전송을 수행하는 방법과, 기지국이 서브프레임 유형에 관한 정보를 공유하고 상향링크 자원을 할당하는 상향링크 스케줄링 방법이 제공된다.
Abstract:
The present invention relates to a method and an apparatus for performing cooperating carrier aggregation in a plurality of base stations in heterogeneous network systems. According to the present invention, inter-base station cooperating carrier aggregation allows wireless communication to be maintained between a terminal and a base station in a heterogeneous network environment, and a frequency band of another base station with excellent signal quality can be set as a secondary component carrier with respect to the terminal for service provision. Accordingly, a service bandwidth with respect to the terminal can be expanded, and unnecessary handover overhead between the base stations can be reduced. In addition, a load of the base station with concentrated traffic can be distributed to another base station, and wireless resource use and efficiency can be increased through inter-base station sharing of available resources.
Abstract:
Disclosed are a carrier aggregation-based interference control method and apparatus for small base stations. The method of the present invention comprises: setting a primary component carrier (PCC) as a first carrier and setting a secondary component carrier (SCC) as a second carrier; monitoring a signal-to-interference plus noise ratio (SINR) of the first carrier or the second carrier; and determining whether the SINR of the first carrier is smaller than a predetermined threshold.