Abstract:
본 발명은 광대역 무선접속 통신시스템에서 중계 서비스를 제공하기 위한 장치 및 방법에 관한 것이다. 본 발명에 따른 통신 방법은, 복수의 링크들을 지원하도록 전체 주파수 대역을 복수의 대역들로 분할하는 과정과, 상기 분할된 대역들 각각에 대하여 부반송파 할당 방식을 서로 독립적으로 결정하는 과정과, 상기 복수의 링크들 각각이 상기 결정된 해당 부반송파 할당 방식으로 통신을 수행하는 과정을 포함한다. 이와 같은 본 발명은 광대역 무선접속 통신시스템에서 주파수 다중화를 통해 직접 링크와 중계 링크를 구분할 경우, 중계링크에 대하여 전용 파일럿 기반의 퍼뮤테이션 방식을 적용함으로써, 중계링크에 대한 독립적인 채널추정이 가능한 이점이 있다. 다중홉, 광대역 무선접속, 프레임, 전용 파일럿, 채널 추정, 파일럿 오버헤드
Abstract:
An apparatus and a method for transmitting and receiving data in a communication system prevent unnecessary operation of a receiver by informing the receiver of non-existence of data to be transmitted. An identifier expressing the transmission data change information is set up as the arbitrary value and is transmitted to the mobile terminal(205). A negative acknowledgement message is received from the mobile terminal(215). The transmission data change information set up as described If the negative acknowledgement message is received over a predetermined frequency set up in advance, non-existence of the transmission data is shown by maintaining the identifier value expressing the preset transmission data change information and transmitting the identifier value to the mobile terminal.
Abstract:
An apparatus and a method for extending the coverage of a broadcast channel using HARQ(Hybrid Automatic Request) in a wireless communication system are provided to enable a BS to transmit an MAP(Mobile Application Part) message including the type information of a long management message transmitted in a current frame and information about the retransmission of the long management message necessary for HARQ recombination to a terminal and enable the terminal receiving the MAP message to perform the HARQ recombination of the long management message. A method for extending the coverage of a broadcast channel using HARQ in a wireless communication system comprises the following steps of: receiving an MAP message from a BS(Base Station)(301); decoding the MAP message to check whether there is a data burst of which the CID type is broadcast CID or fragmentable broadcast CID out of data bursts transmitted to a downlink(303); determining whether there is an MAC(Media Access Control) management message to which HARQ can be applied out of the data bursts transmitted to the downlink; reading a corresponding long management message payload in a data buffer storage and combining the read payload and the payload of a newly received long management message(307); decoding the combined data(309); and checking whether the decoding is successfully completed(311); and storing the received long management message payload in the data buffer storage if the decoding fails(313).
Abstract:
A portable terminal having a metallic housing is provided to enable a first/second housing to be electrically connected, thereby reducing antenna radiation properties from being deteriorated and securing the reliability of the terminal, and making the terminal slim. A portable terminal includes a first housing(101), which is produced by metallic material, and a second housing(102) of metallic material, which is hinge-connected to be rotated away from a folded state facing the first housing(101). The first and second housings(101,102) are electrically connected to each other. A pair of side hinge arms(115) is formed in a state that two hinge arms(115) are separated from each other in one end part of the first housing(101). A center hinge arm(125) is formed in one end part of the second housing(102) and is rotatably connected between the side hinge arms(115).
Abstract:
An embedded antenna device is provided to easily supply power to the antenna device and connect the antenna device to a ground potential by separating the antenna device from a main PCB. A mobile terminal includes an antenna, a main PCB(Printed Circuit Board), and a keypad PCB. The antenna is apart from the main PCB by a predetermined distance. The antenna includes a feeding pad(140), an antenna feeder(150), and a ground connector. The feeding pad is connected to the antenna. The antenna feeder is connected between the main PCB and the feeding pad. The ground connector couples a ground of the main PCB with a ground of the keypad PCB.
Abstract:
노어형 플래시 메모리 셀의 콘택 구조 형성방법을 제공한다. 이 방법은 기판 상에 서로 인접하여 제1 게이트 패턴 및 제2 게이트 패턴을 형성하는 것을 포함한다. 제1 및 제2 게이트 패턴 사이에 갭 영역이 형성되도록 제1 및 제2 게이트 패턴 상에 식각저지막을 형성한다. 식각저지막 상에 평탄화된 층간절연막을 형성한다. 층간절연막을 이방성 식각하여 갭 영역에 갭 영역의 폭보다 좁은 부분 콘택홀을 형성한다. 부분 콘택홀의 측벽을 등방성 식각하여 식각저지막이 서로 대향하여 노출된 측벽을 갖는 콘택홀을 형성한다. 콘택홀 내에 도전막을 채워 상기 기판에 전기적으로 접속된 콘택 플러그를 형성한다.
Abstract:
본 발명은 휴대폰에 관한 것으로서, 특히 폴더형 휴대폰의 안테나 장치에 관한 것이다. 본 발명은 폴더형 휴대폰의 본체에 제1 안테나를 설치하고 폴더에 제2 안테나를 설치하는 구성이며, 특히 상기 제2 안테나를 폴더의 일측에 내장시킴으로써 폴더형 휴대폰을 휴대하기가 용이하도록 하였으며 외부 충격에 의한 안테나 파손도 방지할 수 있게 하였다. 더욱이, 다이버시티 수신 방식 휴대폰의 경우 종래에는 휴대폰 본체의 상단에 헬리컬 안테나와 모노폴 안테나의 조합으로 이루어진 두 개의 안테나 장치를 일정 거리만큼 이격시킨 돌출된 형태였으나, 본 발명에 따른 폴더형 휴대폰에서는 주 안테나 장치를 본체에 설치하고 다이버시티 효과를 위한 안테나 장치를 폴더에 내장하므로써, 다이버시티 수신 방식 폴더형 휴대폰의 휴대를 용이하게 하였으며 두 개의 안테나간 이격 거리도 더 넓게 확보할 수 있게 하였다.
Abstract:
PURPOSE: A method for manufacturing an AOM(Acousto-Optical Modulator) is provided to coat reflection prevention films composed of YF3 materials on an entrance surface and an exit surface of an ultrasonic medium, so as to improve adhesion between a crystal face and the reflection prevention film as well as increasing light transmission efficiency. CONSTITUTION: An entrance surface and an exit surface of a laser light are cleaned by using an IAD(Ion-Assisted Deposition) method in an ultrasonic medium(100). YF3 materials having 1.48 refractive indexes are deposited on the entrance surface and the exit surface, to form a reflection prevention film(120).
Abstract:
PURPOSE: An optical separating apparatus and method are provided, which separates an incident white light into three colors with a red color, a green color, and a blue color. CONSTITUTION: The optical separating apparatus comprises: a first dichroic coating layer (14)to be formed at an optical incident surface of a first region of a first substrate (10); a second dichroic coating layer (15) to be formed at an optical incident surface of a second region of the first substrate (10); a nonreflective coating layer (16) to be formed at an optical output surface of the first substrate (10), wherein the nonreflective coating layer (16) covers the first region and the second region; a high reflective coating layer (13) to be formed at an optical incident surface of a second substrate (20) and for reflecting a light reflected by the first dichroic coating layer (14) and the second dichroic coating layer (15) of the first substrate (10); and a medium (12) to be located between the first substrate (10) and the second substrate (20). Thereby, it is possible to greatly effect a miniaturization of a system which splits a light.