Abstract:
Disclosed are a terminal apparatus and a method for time synchronization. In method for the time synchronization between a terminal device and another terminal device according to the prevent invention, the method for time synchronization includes the steps of: setting reference time for the time synchronization with another terminal device; transmitting a synchronization signal including the set reference time to another terminal device; and performing the time synchronization with another terminal device based on transmission time to transmit the synchronization signal and reception time to receive a response signal when a reception signal is received from another terminal device. Thereby, the terminal device simply and quickly performs the time synchronization with another terminal device.
Abstract:
본 발명은 와이브로 시스템의 소수배 주파수 동기 획득 방법에 관한 것으로, GPS 수신기를 사용하지 않는 기지국 또는 무선 중계기에서 PN 시퀀스의 직교성을 이용하여 인접한 부반송파에서의 수신 신호의 퍼짐 정도를 측정하여 주파수 옵셋을 추정하는 소수배 주파수 동기 획득 방법을 제안한다. 본 발명에 따른 소수배 주파수 동기 획득 방법은, (a) 인접한 부반송파 수신 시퀀스들에 대하여 송신 측에서 전송한 PN 시퀀스를 이용하여 역확산하는 단계; (b) 상기 역확산하여 얻어진 상관 값들의 비를 구하는 단계; 및 (c) 상기 구해진 상관 값들의 비로부터 주파수 옵셋을 추정하는 단계를 포함하는 것을 특징으로 한다. 이에 따라, 타 기지국 또는 중계기의 간섭 신호가 존재하는 와이브로 환경에서 GPS 수신기를 사용하지 않고도 비교적 낮은 복잡도를 가지면서도 정밀한 주파수 옵셋 추정이 가능하다. 와이브로, 주파수 동기, 시간 동기, 소수배 주파수 옵셋 추정
Abstract:
PURPOSE: A storage device based on a flash memory and a memory system including a host and a mobile device are provided to improve performance of the storage device, by performing optimization operation for the storage device through user interface. CONSTITUTION: A storage device (120) includes a flash memory. A host (110) request storage device state and user pattern information through user interface. The host analyzes the user pattern information, and sets up parameters of the storage device so that the storage device performs optimization operation. The host provides a command for the optimization operation to the storage device.
Abstract:
PURPOSE: A method for controlling the performance of a storage and a semiconductor storage device thereof are provided to secure the lifetime of the storage by controlling the performance of the storage according to the change of a workload. CONSTITUTION: An average data throughput for one cycle of a storage is calculated when the storage is operated according to a workload applied at a current cycle(S71). The calculated average data throughput is compared with a preset reference average data throughput to secure the lifetime of the storage(S72). The performance of the storage is controlled according to the comparison result.
Abstract:
PURPOSE: A method for sharing content between devices and a device thereof are provided to share and control web content between the devices based on URL information of the web content, thereby enabling a user to continuously watch the web content. CONSTITUTION: After a control unit(300) searches an opponent device capable of sharing web content and reproduces the web content corresponding to user control, the control unit receives a request of sharing the web content with the opponent device from a user and transmits a sharing request signal to the opponent device. The sharing request signal includes position information for the web content. A communication unit(310) transmits and receives a signal to the opponent device. A sensor senses user control data. After the control unit transmits the sharing request signal to the opponent device, the control unit operates as an input device of the opponent device and transmits control information to the opponent device by generating the control information corresponding to control data. [Reference numerals] (300) Control unit; (302) Shared device search unit; (304) Webpage sharing control unit; (310) Communication unit; (320) Display unit; (330) Input unit; (340) Voice input unit; (350) Motion recognition sensor; (360) Storage unit