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    • 1. 发明申请
    • SYNCHRONIZATION METHOD OF FEMTOCELL BASE STATION AND FEMTOCELL BASE STATION USING THE SAME
    • FEMTOCELL基站和FEMTOCELL基站的同步方法
    • WO2010032955A3
    • 2010-06-17
    • PCT/KR2009005266
    • 2009-09-16
    • IND ACADEMIC COOPKIM KWANG SOONSANG YOUNG JIN
    • KIM KWANG SOONSANG YOUNG JIN
    • H04B7/155
    • H04W56/0015H04L5/0007H04W56/0055H04W74/006H04W92/20
    • The present invention relates to a synchronization method of a femtocell base station and a femtocell base station using the same. More specifically, the invention relates to a synchronization method of a femtocell base station and a femtocell base station using the same, wherein the femtocell base station, using a femtocell for an indoor or shadow area of an existing cell, receives a preamble signal and adjusts downlink synchronization based on the preamble signal; transmits a ranging signal to a macrocell base station and receives uplink synchronization information as a result of the transmission of the ranging signal so as to ensure the uplink synchronization of a terminal; and eliminates interference from an undesirable signal by maintaining orthogonality between subcarriers while using the same or different subcarriers of which the frequency band is the same as that of a macrocell. For this purpose, the invention provides a synchronization method of a femtocell base station which comprises the steps of: enabling the femtocell base station to adjust time synchronization to a preamble signal when the femtocell base station receives the preamble signal from a macrocell base station in an OFDMA (Orthogonal Frequency Division Multiple Access) communication system where the femtocell exists in a macrocell; and transmitting a symbol to a terminal which belongs to the femtocell in order to ensure the time synchronization of the femtocell base station.
    • 本发明涉及一种毫微微小区基站和使用该毫微微小区基站的毫微微小区基站的同步方法。 更具体地,本发明涉及一种使用其的毫微微小区基站和使用其的毫微微小区基站的同步方法,其中,使用现有小区的室内或阴影区域的毫微微小区的毫微微小区基站接收前导码信号并调整 基于前导码信号的下行链路同步; 向宏小区基站发送测距信号,并且作为发送测距信号的结果接收上行同步信息,以确保终端的上行同步; 并且通过在使用与宏小区的频带相同的相同或不同的子载波的同时保持子载波之间的正交性来消除来自不期望的信号的干扰。 为此,本发明提供了一种毫微微小区基站的同步方法,该方法包括以下步骤:当毫微微小区基站在接收到来自宏小区基站的前导信号时,使毫微微小区基站能够调整与前同步信号的时间同步 OFDMA(正交频分多址)通信系统,其中,毫微微小区存在于宏小区中; 以及向属于毫微微小区的终端发送符号,以便确保毫微微小区基站的时间同步。
    • 3. 发明申请
    • METHOD FOR COOPERATIVE CONTROL OF POWER AMONG BASE STATIONS AND BASE STATION DEVICE USING SAME
    • 使用相同站点的基站和基站装置的协同控制方法
    • WO2010147371A2
    • 2010-12-23
    • PCT/KR2010003845
    • 2010-06-15
    • LG ELECTRONICS INCUNIV YONSEI IACFYANG SUCK-CHELKIM BYOUNG HOONPARK KIN BAEKANG MIN GYUKIM KWANG SOONKIM KI-JUN
    • YANG SUCK-CHELKIM BYOUNG HOONPARK KIN BAEKANG MIN GYUKIM KWANG SOONKIM KI-JUN
    • H04W52/22H04W52/26
    • H04W52/40H04B7/024H04L5/0035H04L5/1446H04W52/143H04W52/267H04W52/283
    • Disclosed are a method for cooperative control of power among base stations and a base station device which performs the same. A first receiving unit is configured such that a specific base station in a cooperative unit receives, from a specific terminal located on a cell edge of the specific base station, a token value information which indicates an average transmission rate of the specific terminal and the up-to-date level of satisfaction of the minimum average transmission rate of the specific terminal. A second receiving unit receives, from one or more other base stations in the cooperative unit, information containing an average transmission rate of terminals located on cell edges of each of the base stations, token value of terminals located on cell edges of each of the base stations, and the current power levels of each of one or more base stations. A first power level calculation unit calculates first power level vectors of each of the base stations in the cooperative unit, which ensure the minimum average transmission rates of the specific terminal and the terminals located on the cell edges of each one or more base stations in the cooperative unit. A second power level calculation unit calculates second power level vectors which are the updated power levels of each of the base stations in the cooperative level, with consideration of the current power levels of each of the base stations and the first power level vectors.
    • 本发明公开了一种基站和基站装置之间的电力协调控制方法。 第一接收单元被配置为使得协作单元中的特定基站从位于特定基站的小区边缘的特定终端接收指示特定终端和上行的平均传输速率的令牌值信息 到达特定终端的最小平均传输速率的满足程度。 第二接收单元从合作单元中的一个或多个其他基站接收包含位于每个基站的小区边缘上的终端的平均传输速率的信息,位于每个基站的小区边缘的终端的令牌值 站以及一个或多个基站中的每一个的当前功率电平。 第一功率电平计算单元计算协作单元中的每个基站的第一功率电平矢量,其确保特定终端和位于每个一个或多个基站的小区边缘上的终端的最小平均传输速率 合作单位 考虑到每个基站和第一功率电平矢量的当前功率电平,第二功率电平计算单元计算作为协作电平中每个基站的更新功率电平的第二功率电平矢量。