Abstract:
Disclosed is a communication apparatus using a millimeter wave frequency bandwidth and a communication method thereof. The communication apparatus includes a beam scheduling unit to perform scheduling of a uplink beam and a downlink beam corresponding to movement of a terminal; a core network interface unit to transmit data provided from the beam scheduling unit to a core network and to provide data received from the core network to the beam scheduling unit; a mobile manager to configure uplink and downlink beam groups based on interference information between a beam provided from the beam scheduling unit; and an interface unit between base stations to exchange a control message with other base stations under control of the mobile manager. Accordingly, a cellular network using the millimeter wave frequency bandwidth may be efficiently established. [Reference numerals] (AA) Primary wireless backhaul link; (BB) Secondary wireless backhaul link; (CC) Wireless access link
Abstract:
Disclosed is a beamforming method based on a cluster, capable of improving the transmission performance of data by using a millimeter wave band. The beamforming method performed in a base station includes the steps of: transmitting control information to a plurality of terminals; receiving measurement information corresponding to the control information from the terminals; grouping the terminals into a plurality of groups based on the received measurement information; and transmitting the received measurement information to an upper base station by beamforming. Thereby, a high speed data transmission is performed through a small cell communication environment based on a beam using the millimeter wave band. [Reference numerals] (100) Central base station; (200) Relay base station; (300) Mobile terminal; (S210) Control information; (S220) Perform measurement from received control information; (S230) Measurement information; (S240) Mobile terminal grouping; (S250) Measurement information; (S260,270) Service request; (S280) Beamformed information; (S290) Service response
Abstract:
PURPOSE: A reverse tracking device with a minimized decoding delay time and a method thereof are provided to be able to use minimum memories without using many operation quantities, and to be able to minimize the decoding delay time. CONSTITUTION: A reverse tracking device stores data in a first trace back memory (TBM) which is one of multiple TBMs comprising the reverse tracking device (S800). The reverse tracking device performs a decoding operation which extracts the decoding information of data stored in a previous TBM of the TBM performing the reverse tracking simultaneously with or immediately after that the reverse tracking is performed (S810). Data are stored in the following TBM of the first TBM (S820) in case that the reverse tracking needs to continue after the reverse tracking device completed the storage of data (S815). [Reference numerals] (8S15) Determining whether reverse tracking is continued or not; (AA) Start; (BB) End; (S800) Start data storage; (S805) Start reverse tracking; (S810) Extracting decoded information; (S820) Move to next TBM
Abstract:
본 발명은 무선 통신시스템에서 수신 신호 세기를 측정하는 방법 및 측정한 수신 신호 세기에 따른 링크 적응 방법에 관한 것이다. 본 발명은 순방향 채널의 수신 신호를 증폭하여 디지털 신호로 변환하는 단계와, 디지털 신호의 세기와 증폭 이득을 이용하여 수신 신호 세기를 산출하는 단계와, 산출된 수신 신호 세기에 따라 역방향 채널의 전송 파라미터를 조절하는 단계를 포함한다. 이로써 간단하면서도 정확하게 수신 신호 세기를 측정할 수 있고, 효율적인 링크 적응이 가능하다. 링크 적응, 전송 속도 조절, RSSI