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    • 2. 发明授权
    • Apparatus and method for selecting antennas and nodes MIMO communication system
    • 选择天线和节点MIMO通信系统的装置和方法
    • US07920834B2
    • 2011-04-05
    • US11736798
    • 2007-04-18
    • Wun Cheol JeongNae Soo KimCheol Sig Pyo
    • Wun Cheol JeongNae Soo KimCheol Sig Pyo
    • H04B1/02
    • H04B7/0874H04B7/04
    • An apparatus and method for selecting antennas and nodes in a multi-input multi-output (MIMO) communication system are provided. The apparatus includes a reception unit which detects a communication initiation signal from among a plurality of received signals, a first combination unit which calculates communication capacity based on the communication initiation signal, searches for a combination of transmission antennas that can maximize the communication capacity, and performs communication using the identified combination of transmission antennas, a second combination unit which calculates an average signal-to-noise ratio (SNR) of each node based on the communication initiation signal and selects a node with a highest average SNR and performs communication using the selected node, and a selection unit which activates one of the first combination unit and the second combination unit and inactivates the other combination unit. When the quality of signals transmitted between wireless nodes deteriorates due to a poor channel environment, a node that can minimize the shadowing effect caused by an obstacle that blocks the path of transmission of signals is selected using space diversity. Therefore, it is possible to minimize link communication failures. In addition, it is possible to maximize communication capacity by achieving spatial multiplexing gain using an array antenna that is mounted on a node.
    • 提供了一种用于在多输入多输出(MIMO)通信系统中选择天线和节点的装置和方法。 该装置包括:检测多个接收信号中的通信起始信号的接收单元,基于通信发起信号计算通信容量的第一组合单元,搜索可以使通信容量最大化的发送天线的组合;以及 使用所识别的发送天线的组合来执行通信;第二组合单元,其基于通信发起信号计算每个节点的平均信噪比(SNR),并选择具有最高平均SNR的节点,并使用 选择节点,以及选择单元,其激活第一组合单元和第二组合单元中的一个,并且使另一组合单元无效。 当在无线节点之间传输的信号质量由于信道环境恶化而恶化时,可以使用空间分集来选择可以最小化阻塞信号传输路径的障碍物所引起的阴影效应的节点。 因此,可以使链路通信失败最小化。 此外,可以通过使用安装在节点上的阵列天线来实现空间复用增益来最大化通信容量。
    • 5. 发明申请
    • APPARATUS AND METHOD FOR SELECTING ANTENNAS AND NODES MIMO COMMUNICATION SYSTEM
    • 选择天线和天线MIMO通信系统的装置和方法
    • US20080081570A1
    • 2008-04-03
    • US11736798
    • 2007-04-18
    • Wun Cheol JeongNae Soo KimCheol Sig Pyo
    • Wun Cheol JeongNae Soo KimCheol Sig Pyo
    • H04B7/02
    • H04B7/0874H04B7/04
    • An apparatus and method for selecting antennas and nodes in a multi-input multi-output (MIMO) communication system are provided. The apparatus includes a reception unit which detects a communication initiation signal from among a plurality of received signals, a first combination unit which calculates communication capacity based on the communication initiation signal, searches for a combination of transmission antennas that can maximize the communication capacity, and performs communication using the identified combination of transmission antennas, a second combination unit which calculates an average signal-to-noise ratio (SNR) of each node based on the communication initiation signal and selects a node with a highest average SNR and performs communication using the selected node, and a selection unit which activates one of the first combination unit and the second combination unit and inactivates the other combination unit. When the quality of signals transmitted between wireless nodes deteriorates due to a poor channel environment, a node that can minimize the shadowing effect caused by an obstacle that blocks the path of transmission of signals is selected using space diversity. Therefore, it is possible to minimize link communication failures. In addition, it is possible to maximize communication capacity by achieving spatial multiplexing gain using an array antenna that is mounted on a node.
    • 提供了一种用于在多输入多输出(MIMO)通信系统中选择天线和节点的装置和方法。 该装置包括:检测多个接收信号中的通信起始信号的接收单元,基于通信发起信号计算通信容量的第一组合单元,搜索可以使通信容量最大化的发送天线的组合;以及 使用所识别的发送天线的组合来执行通信;第二组合单元,其基于通信发起信号计算每个节点的平均信噪比(SNR),并选择具有最高平均SNR的节点,并使用 选择节点,以及选择单元,其激活第一组合单元和第二组合单元中的一个,并且使另一组合单元无效。 当在无线节点之间传输的信号质量由于信道环境恶化而恶化时,可以使用空间分集来选择可以最小化阻塞信号传输路径的障碍物所引起的阴影效应的节点。 因此,可以使链路通信失败最小化。 此外,可以通过使用安装在节点上的阵列天线来实现空间复用增益来最大化通信容量。
    • 9. 发明申请
    • SYSTEM AND METHOD FOR HIERARCHICALLY COMMUNICATING INFORMATION USING CACHE SERVER
    • 使用高速缓存服务器进行信息交换的系统和方法
    • US20080140810A1
    • 2008-06-12
    • US11947547
    • 2007-11-29
    • Yong Sun KIMKyeongpyo KimJin Kyeong KimNae Soo KimCheol Sig Pyo
    • Yong Sun KIMKyeongpyo KimJin Kyeong KimNae Soo KimCheol Sig Pyo
    • G06F15/16
    • H04L67/12H04L67/2842
    • Provided is a method and system for hierarchically communicating information between a user and an information providing server that provides information requested by the user. The system includes at least one sensor node, upon receipt of an information request message sent by the user through a terminal, searching for information corresponding to the information request message in a first cache mounted therein and sending the information request message if the corresponding information is not found in the first cache, and a cache server, upon receipt of the information request message from the at least one sensor node, searching for the information corresponding to the information request message in a second cache mounted therein, sending the information request message to the information providing server if the corresponding information is not found in the second cache, receiving the corresponding information, transmitting the received information to the sensor node, and updating the second cache.
    • 提供了一种用于在用户和提供用户请求的信息的信息提供服务器之间分层传送信息的方法和系统。 该系统包括至少一个传感器节点,当接收到用户通过终端发送的信息请求消息时,在安装在其中的第一高速缓存中搜索对应于该信息请求消息的信息,并且如果相应的信息是 在第一高速缓存中没有找到缓存服务器;以及缓存服务器,在从所述至少一个传感器节点接收到所述信息请求消息时,在安装在其中的第二高速缓存器中搜索对应于所述信息请求消息的信息,将所述信息请求消息发送到 信息提供服务器,如果在第二高速缓存中没有找到对应的信息,则接收对应的信息,将所接收的信息发送到传感器节点,并更新第二高速缓存。