Abstract:
다수의 주파수 밴드들을 지원하는 시스템에서 부반송파의 간격을 제어하는 장치를 제공한다. 상기 부반송파 간격제어장치는 다수의 주파수 밴드들에 걸쳐 발생하는 간섭을 검출하는 간섭 검출부, 상기 다수의 주파수 밴드들에 관한 부반송파 간격(subcarrier spacing)과 관련된 시스템 파라미터, 예를 들어, RF, FFT 크기, 채널 대역폭 등과 같은 시스템 파라미터를 부반송파 간격 제어부에 제공하는 시스템 파라미터 제공부, 및 상기 시스템 파라미터를 기초로, 상기 검출된 간섭을 줄이도록 상기 부반송파 간격을 제어하는 부반송파 간격 제어부를 포함한다. 다중밴드를 운용하는 시스템에서 각 밴드별로 서로 다른 부반송파 간격을 적용하여 각 밴드에서 발생하는 간섭을 제어할 수 있다.
Abstract:
The present invention relates to a cluster-based adaptive coupled transmission method. The disclosed transmission method includes the following steps of: setting a wireless LAN cluster for a joint transmission; confirming whether an STA in which an outage occurs exists by checking the received SINRs of the STAs connected to an AP belonging to the set wireless LAN cluster; predicting whether the outage occurs by calculating the data rate of a specific STA when the STA in which the outage occurs and having only the AP having the greatest interference channel participate in the joint transmission; predicting again whether the outage occurs by calculating the data rate of the specific STA when the outage occurrence is predicted and an AP having a secondary size greater than the preceding size of an interference channel participate the joint transmission; and forming an AP and an STA in an RNC cluster, whether the joint transmission is performed, when the outage nonoccurrence is predicted.
Abstract:
본 발명은 인지 무선 기기와 마스터 기기에 관한 것이다. 본 발명의 인지 무선 기기는 기준 채널의 전송 휴지 구간에서 채널 전환될 후보 채널에 대한 정보를 관리하는 채널 정보 관리부, 전송 휴지 구간의 발생에 따라 후보 채널로 통신 채널을 전환하여 통신하는 통신부를 포함한다. 여기서, 통신부는 후보 채널을 통해 일반 데이터 통신과 채널 정보 수신 중 적어도 하나를 수행한다.
Abstract:
PURPOSE: A method for managing a backup channel for a recognition wireless communication and an apparatus thereof are provided to prevent a channel conversion which is frequently generated according to an intergroup overlapping which is caused by a location change according to a movement of devices and an appearance of a new device. CONSTITUTION: A grouping unit (610) performs a grouping of devices which are included in one or more cells which are served by a base station. An allocating unit (630) allocates a backup channel for a recognition wireless communication to the groups based on the mobility of the grouped groups and the location information of the groups. A group type of the groups is determined into any one of a moving group which has mobility and a fixed group which does not have mobility according to whether the group has mobility or not. [Reference numerals] (610) Grouping unit; (630) Allocating unit
Abstract:
데이터 송수신기와 데이터 송수신용 안테나 및 센싱용 수신기와 센싱용 안테나의 공유 방법 및 무선 통신 시스템을 제공한다. 본 발명의 일실시예는 데이터 송수신기와 센싱용 수신기, 또는 데이터 송수신용 안테나와 센싱용 안테나를 상황에 따라서 유연하게 공유하여 사용하는 것에 관한 것이다. 특히, 각 송수신기 및 안테나가 활용되지 않은 구간에 대해서 송수신기 및 안테나의 고유의 목적 이외의 용도로 공유하여 사용하는 방법을 제안한다. 이러한 각 송수신기 및 안테나의 유연한 공유를 통하여 송수신기 및 안테나의 사용 효율을 높임으로써 시스템의 스펙트럼 센싱 성능 향상 및 데이터 송수신 성능을 향상시킬 수 있다. 데이터 송수신기, 센싱용 수신기, 안테나, 공유, 구간
Abstract:
PURPOSE: A contention based channel seizure method on a wireless network using multiple channels is provided to increase channel occupying efficiency in a wireless network environment. CONSTITUTION: Terminals which are unable to transmit a data frame through the first contention obtain occupied channel information through the first contention from the terminal transmitting a data frame (530). The terminals confirm an occupation available channel based on the occupation channel information (540). The terminals perform second contention in the available channel (545). The terminal sets up to match a channel occupation period with the expiration time point. [Reference numerals] (510) First competition performance; (515,555) Competition result victory?; (520,560) Data frame transmission; (525,565) Transmission complete?; (530) Occupation channel information acquisition; (535) Available occupation channel check; (540) Is there occupation channel?; (545) Second competition performance; (550) Channel occupation end; (AA) Start; (BB,DD,GG,II,KK,MM) End; (CC,EE,FF,HH,JJ,LL) No
Abstract:
PURPOSE: A beacon transmission method is provided to improve network transmission efficiency by combining Center beacon method and distribution beacon method. CONSTITUTION: A specific apparatus in one of the two networks(400,410) is selected as a coordinator of a network combining the two networks. The selected coordinator transmits beacon to all apparatuses of the two networks through the beacon period section of a super frame. Each network coordinator of the two networks is a network which is operated as a center beacon method transmitting the beacon using each network coordinator. The specific apparatus is a network coordinator which operates the network using the center beacon method. [Reference numerals] (400) Network A; (410) Network B; (420) Allocated NEIGHBOR; (AA,CC) Data/control; (BB) Neighboring network
Abstract:
본 발명은 프레임 축소 방법 및 장치에 관한 것으로서,상세하게는 헤더(header)와 페이로드(payload)로 구성된 프레임 방식의 데이터를 송,수신하는 통신 시스템에서 효율적인 데이터 전송을 위한 방법 및 장치에 관한 것이다. 프레임 헤더(header)의 내용중 반복되는 항목이 많은 경우 특정 프레임 프리엠블을 할당하여 반복되는 항목들을 생략하고 데이터 통신 효율을 증대시키는 프레임 헤더 축소 방법 및 장치를 제공한다. 프리엠블, 프레임, 데이터 통신, 헤더
Abstract:
PURPOSE: A communication method for sharing characteristic information by using a preamble, a method for generating a preamble, and a communication system which is applied with the same are provided to efficiently share the characteristic information of a wireless telecommunication system by minimizing an amount of an information bit. CONSTITUTION: A first repetitive pattern about a real number and a second repetitive pattern about an imaginary number at a preamble are determined in a time domain(810). The first repetitive pattern and the second repetitive pattern depend on subcarrier selection or the subcarrier sequence of selected subcarriers and the allocation of a subcarrier phase value. Two or more subcarriers are selected from a plurality of subcarriers(821). A subcarrier sequence and subcarrier phase value of the preamble, which is mapped in two or more subcarriers, are determined(822,823). A transmitter generates the preamble by mapping the subcarrier sequence and the subcarrier phase value in the selected subcarriers(830). The preamble is transmitted(840).
Abstract:
PURPOSE: A contention-based data communication apparatus and a method thereof are provided to transmit data in consideration of priority by detecting a detection signal transmitted from other communication devices. CONSTITUTION: A search signal generator(130) generates a detection signal having high priority, and a search signal detection unit(140) detects the detection signal received from other communication devices. If radio resources are available, a transmission determination unit(110) transmits a generated search signal. According to the priority between the received detection signal and the transmitted search signal or the existence of the received search signal, the transmission judgment unit judges the transmission of a communication frame.