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:
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:
A method for adaptively determining a cognitive radio communication mode in a cognitive radio communication system includes the steps of: obtaining the minimum degree of freedom which is allowable in an antenna space corresponding to a main user device of the cognitive radio communication system; calculating interference from at least one sub user device to the main user device; and determining a cognitive radio communication mode of at least one sub user device based on the interference and the minimum degree of freedom which is allowable. [Reference numerals] (210) Obtaining the minimum degree of freedom which is allowable of a main user device; (220) Calculating interference from the main user device; (230) Determining a cognitive radio communication method; (240) Underlay method; (250) Interweave method; (260) Interference alignment is needed between sub user devices?; (270) Sub user device interference alignment; (280) Sub user interference patience; (290) Determining a transmit beam formation matrix; (AA) Start; (BB) End
Abstract:
An embodiment according to the present invention provides a carrier integration device including: a level management unit leveling license bands allocated to a cognitive radio cell into PRP (primary radio resource) levels and a cognitive radio database or sharable bands obtained with spectrum sensing into ARR (auxiliary radio resource) levels, and managing them; a determination unit determining the service quality level for the communication service provided to the cognitive radio cell; and a service-providing unit allocating frequency resource of the PRR level when the service quality level requires a first communication service, and allocating frequency resource of the ARR level when the service quality level requires a second communication service lower than the first communication service. [Reference numerals] (100) Carrier integration apparatus
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