Abstract:
본 발명은 주파수 축 자원 할당 단위인 PRB를 사용하는 물리 채널 또는 물리 신호를 생성하는 단계 및 물리 채널 또는 물리 신호를 전송하는 단계를 포함하고, 복수의 뉴머롤러지들을 위한 부반송파 간격들은 서로 다르게 정의되고, 복수의 뉴머롤러지들 중에서 제1 뉴머롤러지가 적용되는 제1 PRB에 속하는 부반송파의 개수는, 복수의 뉴머롤러지들 중 제2 뉴머롤러지가 적용되는 제2 PRB에 속하는 부반송파의 개수와 동일하고, 제1 PRB가 가지는 경계는 제2 PRB가 가지는 경계에 정렬되는 기지국의 전송 방법에 관한 것이다.
Abstract:
셀 탐색 방법이 개시된다. 매크로 셀 주변에 복수의 소형 셀이 배치된 환경에서, 매크로 기지국은 연결이 확립된 단말에 대해 다른 단말과 구분될 수 있는 단말 고유 신호를 할당하고, 단말 고유 신호에 대한 정보를 복수의 소형셀 기지국들과 공유한다. 단말은 셀 탐색이 트리거되면 할당받은 단말 고유 신호를 송신하고, 복수의 소형셀 기지국들은 수신한 단말 고유 신호에 대한 측정을 수행한 후 측정 결과를 매크로 기지국에 보고한다. 매크로 기지국은 복수의 소형셀 기지국들로부터 보고된 측정 결과에 기초하여 단말에 대한 후보 소형셀 집합을 구성하고, 이를 단말에 전송한다. 따라서, 단말은 신속하고 정확하게 주변 셀을 탐색할 수 있다.
Abstract:
A method for cooperative communication in wireless communication systems is disclosed. The method for cooperative communication in a transmitter determines one or more signal transmission paths including one or more relay systems by considering the location of a terminal and the signal transmission delay time of the relay systems using the transmitter; and transmits signals through the determined transmission paths to the terminal. Therefore, the quality and data transmission rate of signals received through different paths are improved by allowing the signals to reach a CP(Cyclic Prefix) section and the terminal to perform normal demodulation.
Abstract:
A data transmission method machine to machine (M2M) communications apparatus for M2M communications is disclosed. The data transmission method for the M2M communications divides a plurality of sub-frames composed of time resources and frequency resources into a first area for transmitting the sub-frames as the control data and a second area for transmitting the data and allocates resources for the M2M communications in the second area of the sub-frames according to the set hopping period and hopping frequency interval. Therefore, the data transmission method is able to increase the data transmission rate of the M2M communications apparatus.
Abstract:
PURPOSE: A machine-to-machine communications supporting method and device are provided to support an efficient machine-to-machine communications service in a 3GPP(Third Generation Partnership Project) LTE(Long-Term Evolution)-based mobile communications system while maintaining compatibility with a legacy LTE terminal. CONSTITUTION: A machine-to-machine communications terminal(200) includes a control part(210) and a transmission/reception part(220). The control part detects the number of OFDM(Orthogonal Frequency Division Multiplexing) symbols occupied by a legacy PDCCH(Physical Downlink Control Channel) in a downlink channel sub-frame received from a base station through the transmission/reception part. The control part determines the number of OFDM symbols occupied by a legacy PDCCH based on extracted CFI(Control Format Indicator) information bits for a legacy terminal. The transmission/reception part receives a downlink sub-frame from a base station and provides to the control part. [Reference numerals] (210) Control part; (220) Transmission/reception part
Abstract:
PURPOSE: A data transceiving method and an object communication device are provided to perform transceiving and channel application for a low cost MTC(Machine Type Communications) device in a 3GPP(3rd Generation Partnership Project) LTE-based mobile communication system while maintaining compatibility with a legacy LTE terminal. CONSTITUTION: A receiving unit(310) receives one or more downlink channels or signaling. A control unit(320) detects MTC bandwidth information and an MTC downlink control channel through the received downlink channels or signaling. The control unit demodulates the MTC downlink data channel using the MTC downlink control channel. The control unit extracts the control information for MTC downlink data transmission. A transmitting unit(330) transmits the uplink data based on the control information. [Reference numerals] (310) Receiving unit; (320) Control unit; (330) Transmitting unit