Abstract:
협력 MIMO 송수신 방법 및 이를 지원하는 단말이 개시된다. 마스터 단말은 협력 통신을 수행한 슬래이브 단말과 클러스터를 형성한다. 마스터 단말은 송신할 데이터 중 일부의 데이터를 슬래이브로 전송하여 공유하며, 슬래이브 단말은 마스터 단말로부터 전송된 데이터를 투과적으로 목적지 노드로 송신한다.
Abstract:
A device-to-device direct communications method is provided. The device sets at least one frame among a plurality of frames included in a superframe to a frame type 0 which is sectioned into a synchronization region for performing a synchronization procedure, a discovery region for discovering devices, a peering region for a connection between devices, and a data region for scheduling of resources and data transmission. The device sets remaining frames among the frames to a frame type 1 which is sectioned into the synchronization region and the data region.
Abstract:
The present invention relates to a synchronization method of a terminal in direct communication between the terminals, and an apparatus thereof. According to the embodiment of the present invention, the synchronization method of the terminal in direct communication between the terminals includes the steps of: receiving a synchronization signal from a plurality of different terminals in a current frame; and estimating the synchronization time of the proceeding frame based on the synchronization signal received from different terminals.
Abstract:
According to an embodiment of the present invention, a method of discovering a counterpart terminal with which direct communications, in which wireless terminals directly communicate with each other without passing through a node of an intermediate stage, is performed in an infrastructure network environment in which communications are implemented via the node of the intermediate stage includes the steps of: broadcasting an identifier packet including an identification address field in which typical identification address of each of wireless terminals is recorded and a service field in which information about each service supported by the wireless terminals is recorded; when a wireless terminal which intends to discover the counterpart wireless terminal for the direct communications receives the identifier packet and the information about the service recorded in the service field of the received identifier packet represents a kind of service identical with the kind desired by the wireless terminal, inquiring of the infrastructure through an infra link which is a communications link with the node of the intermediate stage whether the service type desired by the wireless terminal is supported by the wireless terminal broadcasting the received identifier packet; and when the wireless terminal which intends to discover the counterpart wireless terminal for the direct communications confirms a result of the inquiring through the infra link and the service type desired by the wireless terminal is supported by the wireless terminal broadcasting the received identifier packet, determining the wireless terminal having the typical identification address recorded in the identification address field of the received identifier packet as the counterpart wireless terminal.
Abstract:
A device transmits a discovery signal including the device′s identification information at an empty slot found in the multiple discovered slots in a discovered domain. The discovery signal includes two OFDM symbols. One of the two OFDM symbols includes one or more tones, and displays the device′s identification information to the sub-carrier location of at least one tone. [Reference numerals] (810) Signal generating unit; (820) Signal transmitting unit; (830) Signal receiving unit
Abstract:
본 발명은 이산 퓨리에 변환을 고속으로 처리하는 장치 및 방법에 관한 것으로서, 랜덤 액세스 신호 검출을 위한 제1 입력신호를 입력받아 2의 지수승의 길이를 갖는 제2 입력신호로 변환하여 출력하는 제로 패딩부; 상기 제로 패딩부에서 출력된 상기 제2 입력신호에 대하여 고속 퓨리에 변환을 수행하는 고속 퓨리에 변환부; 및 상기 고속 퓨리에 변환부에서 출력된 출력신호로부터 프리앰블 인덱스를 검출하는 프리앰블 인덱스 결정부를 포함하는 이산 퓨리에 변환의 고속 처리 장치 및 그 처리 방법을 제공한다. 본 발명에 따르면, SC-FDMA 시스템에서 랜덤 액세스 신호를 검출하기 위해 수행되는 이산 퓨리에 변환을 고속 퓨리에 변환을 이용하여 신속하게 수행할 수 있고, 연산에 필요한 하드웨어의 구성을 단순화할 수 있다. 이산 퓨리에 변환, 고속 퓨리에 변환, FDMA, 랜덤 액세스 신호
Abstract:
PURPOSE: A method for detecting a random access signal is provided to reduce a false alarm resulting the wrong detection of another random access signal. CONSTITUTION: The size of a random access signal for every current index value is calculated(S805). It is judged whether the current index value belongs to a first or second preamble interval(S830). The current index value of the random access signal which is the largest among the current index values in the first preamble interval is determined as a peak index value(S845). The random access signal of the current index value of which the difference between the peak index and the current index values of the second preamble interval is lower than the peak invalid region value is ignored(S860,S865).
Abstract:
본 발명은 자동 재전송 방식을 지원하는 기지국의 스케줄링 장치에 관한 것으로, 더욱 상세하게는 무선 데이터 통신에서의 오류를 정정하고, 고속의 프레임 생성을 위한 자동 재전송 방식(ARQ : Automatic Repeat reQuest)을 제공하는 기지국에서 단말기로 전송되는 데이터 유닛을 스케줄링하는 장치에 관한 것이다. 본 발명에 따르면 기지국에 접속된 단말기로부터 단말기 상태 정보를 수신하는 수신부, 상기 수신한 단말기 상태 정보에 기반하여 상기 단말기로 전송할 복수의 데이터 유닛의 전송 순위를 결정하는 스케줄링 관리부, 및 상기 결정된 전송 순위에 기반하여 상기 데이터 유닛들을 상기 단말기로 전송하는 전송부를 포함하는 것을 특징으로 하는 전송 제어 장치가 제공된다. 본 발명에 따르면 자동 재전송 방식을 지원하는 기지국에서, 데이터 유닛의 전송 순위와 서비스 품질(QoS : Quality of Service)을 고려하여 데이터 유닛의 전송 순위를 제어할 수 있다. ARQ, MAC, 재전송, 전송 확인
Abstract:
An apparatus for scheduling the transmission of a data unit in a base station is provided to control the transmission priority of a data unit by considering a QoS(Quality of Service) in a base station. A service identifier(710) identifies a service related to a non-ARQ(Automatic Repeat reQuest) transmission queue among plural data services that a terminal uses, and transmission priority(720) means the transmission priority of a data service that a terminal uses. A transmission control device schedules the data unit based on re-determination of the transmission priority related to the data unit. A non-ARQ transmission queue stores the data unit that is not transmitted based on the ARQ transmission method. If the ARQ transmission method is not used, the information for the retransmission is not stored.