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    • 94. 发明授权
    • 무선 메쉬 네트워크에서 통신 방법 및 이를 지원하는 장치
    • 无线网状网络中的通信方法及其支持的设备
    • KR101749326B1
    • 2017-07-04
    • KR1020110033029
    • 2011-04-11
    • 한국전자통신연구원연세대학교 산학협력단
    • 김현재임광재정종문이대영박종홍
    • H04W40/12H04W84/18H04J11/00
    • 무선메쉬네트워크에서의노드에의한통신방법이제공된다. 상기방법은네트워크에포함된다른노드간거리를측정하고, 상기다른노드간거리를기반으로상기노드의수신단에서의 SINR(signal to noise and interference ratio)를획득하고, 상기다른노드간링크에대한 BER(bit error rate) 및캐퍼시티(capacity)를상기 SINR의확률적분포를기반으로획득하고, 상기다른노드의수를획득하고, 상기 BER, 상기캐퍼시티및 상기다른노드의수를기반으로코스트파라미터(cost parameter)를획득하고, 상기코스트파라미터에가중팩터(weight factor)를적용하여가중된링크코스트파라미터를획득하고및 상기가중된코스트파라미터및 최소코스트라우팅알고리듬(minimum cost routing algorithm)을기반으로라우팅경로를설정하는것을포함한다.
    • 提供了无线网状网络中的节点的通信方法。 该方法包括测量包括在网络中的节点之间的距离,基于节点间距离获得节点的接收节点处的信噪比(SINR) 基于SINR的概率分布的错误率和容量,获得其他节点的数量,基于BER,其他节点的容量和数量计算成本参数, 通过将权重因子应用于成本参数来获得加权链路成本参数,并且基于加权成本参数和最小成本路由算法来设置路由路径 它包括。
    • 98. 发明公开
    • 부반송파 간섭을 완화하는 신호 설계 방법 및 장치
    • 信号设计的方法和装置,用于减轻干扰
    • KR1020140060443A
    • 2014-05-20
    • KR1020120127027
    • 2012-11-09
    • 한국전자통신연구원
    • 김정현김지형김현재임광재
    • H04B7/005H04B7/26
    • H04L27/2657H04L25/03821H04L27/2691H04W72/0453H04B15/00H04L25/0328H04W72/082H04W72/12
    • In order to reduce interference that may be generated when a plurality of signals having different subcarrier intervals are received, provided are a method of controlling a signal having a larger subcarrier interval to be suitable for a signal having a smaller subcarrier interval and a method of removing CFO interference. According to an embodiment of the present invention, the subcarrier intervals of a plurality of signals to be transmitted by wireless terminals are compared with each other, and signals are designed so that a signal having the largest subcarrier interval may be repeatedly transmitted. Therefore, interference that may be generated among different kinds of signals when the base station simultaneously receives the different kinds of signals to perform Fourier transform may be mitigated. In addition, interference caused by a CFO may be removed by previously compensating the CFO estimated in a time domain to perform Fourier transform.
    • 为了减少当接收到具有不同子载波间隔的多个信号时可能产生的干扰,提供了一种控制具有较大子载波间隔的信号以适合于具有较小子载波间隔的信号的方法和一种去除 CFO干扰。 根据本发明的实施例,将由无线终端发送的多个信号的子载波间隔相互比较,并且设计信号,使得可以重复发送具有最大子载波间隔的信号。 因此,可以减轻当基站同时接收不同种类的信号进行傅立叶变换时在不同种类的信号之间产生的干扰。 另外,由CFO导致的干扰可以通过预先补偿在时域中估计的CFO来执行傅立叶变换来消除。
    • 99. 发明公开
    • 무선 메쉬 시스템에서의 메쉬 노드 동기화 방법
    • 无线网络系统中的网状节点同步方法
    • KR1020130051350A
    • 2013-05-20
    • KR1020110116644
    • 2011-11-09
    • 한국전자통신연구원
    • 김현재문영진김지형김정현신우람이안석임광재권동승
    • H04W56/00H04W84/18H04L7/00
    • H04W56/001H04L7/0008H04W84/18
    • PURPOSE: A mesh node synchronization method in a wireless mesh system is provided to modulate a preamble of a neighbor node and broadcasting information. CONSTITUTION: An automatic gain controller transmits a network setup signal received from a neighbor node to a PHY(PHYsical Layer)(S531b). The PHY synchronizes time or frequency by using a preamble of the network setting signal(S532b). The PHY transmits the location information of a starting point of a super frame of the network setting signal to a DSP(Digital Signal Processor). The DSP synchronizes the clock of a mesh node through the location information. [Reference numerals] (AA) Automatic gain control unit; (BB) Power on; (DD) Network setting signal searching time; (EE) Location information transfer of network setting signal/super frame starting point; (S520,CC) Initial network setting mode request; (S531b) Network setting signal/PPA_en signal transfer; (S532b) Time/frequency synchronization network setting signal decoding; (S533b) Super frame starting point correction; (S540,FF) Normal network setting mode request; (S550b) Network entrance
    • 目的:提供无线网状系统中的网格节点同步方法来调制邻居节点的前同步码和广播信息。 构成:自动增益控制器将从邻居节点接收的网络建立信号发送到PHY(PHY层)(S531b)。 PHY通过使用网络设置信号的前同步码来同步时间或频率(S532b)。 PHY将网络设置信号的超帧的起点的位置信息发送到DSP(数字信号处理器)。 DSP通过位置信息同步网状节点的时钟。 (附图标记)(AA)自动增益控制单元; (BB)开机; (DD)网络设置信号搜索时间; (EE)网络设置信号/超帧起点的位置信息传输; (S520,CC)初始网络设置模式请求; (S531b)网络设定信号/ PPA_en信号传送; (S532b)时间/频率同步网络设置信号解码; (S533b)超帧起点校正; (S540,FF)正常网络设置模式请求; (S550b)网络入口
    • 100. 发明公开
    • 무선 통신 시스템의 자원 할당 장치 및 방법
    • 分配无线通信系统资源的设备和方法
    • KR1020130048084A
    • 2013-05-09
    • KR1020110113017
    • 2011-11-01
    • 한국전자통신연구원
    • 신우람김현재이안석임광재권동승
    • H04W72/04H04J11/00
    • H04W72/0406H04J11/00H04W84/18
    • PURPOSE: A resource assignment device of a wireless communication system and a method thereof are provided to prevent the collision between time shaft resources and frequency shaft resources in a wireless communication system based on an OFDMA(Orthogonal Frequency Division Multiple Access). CONSTITUTION: A reception unit(720) receives a control message from a hop node of a communication node. An assignment control unit(730) collects the resource assignment information of two hop nodes and one hop node through the control message. The assignment control unit selects assignable transmission resources and assignable reception resources using the resource assignment information of the nodes. The assignment control unit individually assigns the transmission resources and reception resources to an assignable reception resource and the assignable transmission resource. [Reference numerals] (710) Transmission unit; (720) Reception unit; (730) Assignment control unit
    • 目的:提供无线通信系统的资源分配装置及其方法,以防止基于OFDMA(正交频分多址)的无线通信系统中的时间轴资源与频率轴资源之间的碰撞。 构成:接收单元(720)从通信节点的跳跃节点接收控制消息。 分配控制单元(730)通过控制消息收集两跳节点和一跳节点的资源分配信息。 分配控制单元使用节点的资源分配信息来选择可分配的发送资源和可分配的接收资源。 分配控制单元将发送资源和接收资源分别分配给可分配的接收资源和可分配的发送资源。 (附图标记)(710)传输单元; (720)接待单位; (730)分配控制单元