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:
TV 화이트 스페이스 기반 TVBD 그룹 핸드 오버 방법이 제공되며, 가용 채널 정보 제공 서버로 이동 수단이 이동하는 경로에 대응하는 다중 위치 정보를 전송하는 단계, 가용 채널 정보 제공 서버로부터, 전송된 다중 위치 정보에 대한 응답으로 다중 채널 정보(Multiple Geo-Location Information)를 수신하는 단계, 다중 채널 정보에 기초하여, 이동 수단의 이동에 따른 채널 스위칭이 최소화되도록 동작 채널 세트 정보를 추출하는 단계, 추출된 동작 채널 세트 정보를 TVBD 그룹으로 전송하는 단계를 포함한다.
Abstract:
The present specification discloses a method and a device for managing an error in wireless communication and, more specifically, a method and a device for managing an error in multicast or broadcast transmission. The method for managing an error in multicast or broadcast transmission disclosed in the present specification comprises the steps of: receiving multicast or broadcast data to multiple receivers (121); determining whether the data is normally received; selecting a random resource among wireless resources through which an acknowledgement of whether the data is normally received is to be transmitted; and transmitting the acknowledgement of whether the data is normally received through the selected random resource.
Abstract:
The present invention relates to a method for improving frequency-sharing efficiency between adjacent systems using an idle band. A method for allocating an operating channel priority between frequency-sharing systems includes a step of approximate channel priority allocation collecting information about information about target WSO (white space object) for allocating priority of active channels and classifying the active channels according to a predetermined reference; and a step of micro channel priority allocation checking an interference level of the classified channel and removing the channel. According to the present invention, the effective coexistence between frequency-sharing systems by utilizing a usable channel registered on a CM (coexistence manager) object or WSO (white space object) capable of using only active channels without any limited channel in effective allocating channels. [Reference numerals] (AA) START; (BB) END; (S100) Allocate approximate channel priority; (S200) Allocate micro channel priority
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:
The present invention relates to a data transmission system using carrier aggregation and, more particularly, to a wireless communication system applying a carrier aggression method. The data transmission system allocates a wireless resource by using a correspondent relation between a downlink and a uplink and transmits data by using the allocated wireless resource. [Reference numerals] (AA) Upward link