Abstract:
Provided are a wireless power charging apparatus and a method thereof, capable of supplying power to one or more wireless power receiving apparatuses through one or more selected wireless power transmitting apparatuses after selecting one or more wireless power transmitting apparatuses to supply the power to one or more wireless power receiving apparatuses based on location information by recognizing the location information of one or more wireless power receiving apparatuses.
Abstract:
PURPOSE: A method for transmitting and receiving an uplink signal in a wireless communication system is provided to easily raise allocation power per each sub-carrier wave without changing the size of a basic transmission block of an uplink wireless resource. CONSTITUTION: A resource block encodes a second data signal of a second channel by using a first sequence when transmitting a first data signal of a first channel(S100). The resource block additionally encodes the second data signal of the second channel by using a second sequence. The resource block transmits the encoded second data signal. [Reference numerals] (S100) Encoding a signal of a second channel by using a first sequence used in a first channel sharing a transmission block; (S110) Additionally encoding the encoded signal by using a second sequence for resource sharing; (S120) Transmitting the encoded signal through the transmission block
Abstract:
위성 OFDMA 하향링크에서 PAR를 최소화하기 위한 제어 방법을 제안한다. 본 발명의 실시예에 따른 OFDMA기반 위성 무선 시스템의 하향링크에서 제어 방법은, 모든 사용자의 대규모 페이딩값들을 추정하는 단계; 대규모 페이딩값이 기준 페이딩값보다 큰 사용자들의 수를 카운트하는 단계; 상기 카운트한 사용자들의 수가 기준 사용자 수보다 작으면, 상기 카운트한 사용자들이 사용하는 부반송파의 수를 카운트하는 단계; 및 상기 카운트한 부반송파의 수가 기준 부반송파 수 보다 작으면, 전력제어 모드로 제어하는 단계를 포함한다. PAR, 위성 OFDMA, 전력제어, AMC, 적응적 변조 및 부호화
Abstract:
PURPOSE: A mobile satellite communication method and apparatus by multipoint collaboration transmission are provided to embody frequency reuse index 1 in the OFDMA(Orthogonal Frequency Division Multiple Access)-based mobile satellite communication system. CONSTITUTION: In case a terminal is located in the central zone of beam, a mobile satellite communication system decides a single point transmission mode using the beam into a signal transmission mode(S1106,S1108). In case the terminal is located in the border of the beam, the apparatus confirms whether the terminal is located in a border area in which two beams are contiguous(S1112). In case the terminal is located in the border in which the two beams are contiguous, the apparatus decides a multipoint collaboration transmission mode using the two beams into the signal transmission mode(S1114).
Abstract:
PURPOSE: A disaster warning apparatus and a method using wireless communication of satellite and ground are provided to offer various disaster information stably and continuously. CONSTITUTION: A receiver(501) receives the disaster situation information from a disaster prevention warning apparatus through a satellite or ground network. A disaster alerting signal extractor(503) extracts the disaster warning signal from the situation information. An output unit(505) outputs the disaster information using the situation information.
Abstract:
PURPOSE: A method for establishing an upper link in a mobile communications system is provided to transmit an upper link signal with a terminal to an upper link point which is measured by a satellite. CONSTITUTION: An uplink random access signal from a terminal in a satellite beam area is received(S500). A location of the terminal is presumed(S502). The uplink transmission time transmitting the uplink signal is measured according to the presumed location(S504). An uplink transmission point of each terminal is transmitted to each terminal(S506). The uplink signal is received from each terminal in the uplink transmission point of each terminal(S508).
Abstract:
본 발명은 전파 자원 효율 증대를 위한 전파 자원 재사용 시스템 및 그 방법에 관한 것이다. 본 발명은 위성으로부터 송신되는 신호를 사용자 단말로 재 전송하는 중계기를 포함하는 통신 시스템에서, 위성과 같은 광역 커버리지에서 사용되는 전파 자원의 일부를 중계기 커버리지에서 재사용할 수 있도록 한다. 따라서, 별도의 전파 자원 없이도 중계기 데이터를 사용자 단말에 전송할 수 있는 전파 자원을 확보할 수 있다. 전파 자원 재사용, 중계기, 중계기 데이터, 중계기 커버리지