Abstract:
The present invention relates to a method for exchanging a message required for interaction between entities in a coexistence management system managing multiple frequency sharing devices. The method for exchanging a message in a coexistence management system including a coexistence enabler (CE), a coexistence manager (CM), and a coexistence discovery and information server (CDIS) according to the present invention comprises the following steps of creating a reconfiguration request message by the CM and transmitting the message to the CE; and waiting for a reconfiguration response message from the CE, wherein the reconfiguration request message can include at least one among an operating channel list, a transmission power limit, a channel sharing status flag, a transmission schedule, and channel classification information of WSO provided by the CE.
Abstract:
본 발명은 다수의 주파수 공유 장치를 관리하는 상호공존 관리 시스템에서의 각 개체들의 동작 방법에 관한 것이다. 각 개체(CE, CM, CDIS)의 동작들을 수행하기 위해, 개체의 상태 머신을 Inactive(비활성), Active(활성), Waiting engagement(상호동작 대기), Engaged(상호동작), Request sent(요청 전송) 및 Request received(요청 수신) 상태로 정의한다.
Abstract:
본 발명에서는 평면형 RF 크로스오버 구조에 있어서, 동일면에 두 개의 독립적인 제1, 2 전송 선로들을 교차하도록 구현하며, 제1, 2 전송 선로들이 교차 시 교차 영역이 서로 다른 면에 구현되도록 제1 전송 선로는 상부에서 진행하고, 제2 전송 선로는 비아-홀(via-hole) 연결구조를 사용하여 하부로 전달되며, 교차 영역을 벗어나 비아-홀 연결 구조를 통해 다시 상부로 연결하되, 교차영역에 CPW형 전송 선로 구조를 적용시켜 최적의 신호 전달 특성을 얻을 수 있다.
Abstract:
The present invention relates to a practical interference alignment method using multiple antennas in a multi-cell overlapping environment. The channel information needed to configure a signal processing filter for each transceiver node is restricted to local CSI. Moreover, each transceiver node can design its own signal processing filter using the local CSI and apply the signal processing filter in an environment where a normal number of transmission and reception pairs exist.
Abstract:
Provided are an apparatus and a method for determining the identity of a wireless LAN system occupying a channel using information within a signal field or time synchronization between target channels. Therefore, the present invention includes: a preamble detecting unit configured to detect a preamble in each channel; a channel information obtaining unit configured to obtain reference time information when the preamble is detected in each channel, or to obtain signal field information in each channel using the detected preamble; and an identity determining unit configured to determine the identity of the wireless LAN system occupying each channel by comparing the reference time information obtained in each channel, or by comparing the signal field information obtained in each channel.
Abstract:
인지 무선 시스템에서의 스펙트럼 센싱 방법, 전송휴지기간 배치 방법, 이를 위한 단말, 기지국 및 슈퍼프레임 구조가 개시된다. 이 방법은 기지국과의 통신을 수행하는 통신 단계; 및 상기 인지 무선 시스템에서 사용되는 주파수채널들의 전송휴지 기간마다, 상기 전송휴지기간을 갖는 주파수채널에 대한 스펙트럼 센싱을 수행하는 센싱 단계를 포함하고, 상기 각 주파수채널들의 전송휴지기간은 서로 중첩되지 않음을 특징으로 한다. 본 발명에 따르면, 인지 무선 시스템에서 원래 사용자(Incumbent User)의 출현여부 검출의 신뢰도를 높일 수 있다.
Abstract:
PURPOSE: A data transceiver, a data transceiving antenna, a sharing method between a sensing receiver and a sensing antenna, and a wireless communication system are provided to improve the use efficiency of the transceiver and the antenna through smooth sharing of each transceiver and antenna. CONSTITUTION: In case a current time section is a data transceiving section, a data transceiver transmits and receives data(410,420). In case the time section is a QP(Quiet Period), the data transceiver receives inband sensing data with a sensing receiver(430,440). In case the time section is not the QP, a data signal processor confirms a separate sensing schedule(450). In case there is the sensing schedule, the data transceiver receives sensing data(460).
Abstract:
PURPOSE: A method and a device for controlling transmission power of a cognitive radio device are provided to guarantee reliable communication of the cognitive radio device, thereby minimizing interference for a licensed user. CONSTITUTION: A CR(Cognitive Radio) device obtains CR environment information for a licensed user or an unlicensed user which occupies an adjacent cell or an adjacent channel of the CR device(802). The CR device determines a transmission power value by the CR environment information(804). The CR device generates transmission power control information including the transmission power value(806). The CR device controls transmission power by the transmission power control information(808).