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Patent Agency Ranking
公开(公告)号：KR1020100088266A
公开(公告)日：2010-08-09
申请号：KR1020090007374
申请日：2009-01-30
Applicant: 한국전자통신연구원 , 서울대학교산학협력단
IPC: H04B7/14
CPC classification number: H04B7/026 , H04B7/082 , H04L1/0077 , H04L1/1829
Abstract: PURPOSE: An apparatus and a method for communicating cooperatively using network coding in an uplink system comprised of a multiple relay device are provided to code and transmit transmission signals which need retransmission through a selected relay device among relay devices, thereby maximizing a diversity gain and facilitating adaptive communication due to a network change. CONSTITUTION: A signal receiving unit(113) receives a plurality of transmission signals from a plurality of transmitters(101). A request receiving unit(115) receives retransmission requests about some among the transmission signals. A transmitting unit(117) codes some transmission signals corresponding to the retransmission requests through a network and transmits the coded signals to a receiver.
Abstract translation: 目的：提供一种在由多个中继设备组成的上行链路系统中协同使用网络编码进行通信的装置和方法，用于通过中继设备之间的所选择的中继设备对需要进行重传的传输信号进行编码和发送，从而最大限度地提高分集增益 由于网络变化而导致自适应通信。 构成：信号接收单元（113）从多个发送器（101）接收多个发送信号。 请求接收单元（115）接收关于发送信号中的一些的重传请求。 发送单元（117）通过网络对与发送请求对应的发送信号进行编码，并将编码信号发送给接收机。
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公开(公告)号：KR101081253B1
公开(公告)日：2011-11-08
申请号：KR1020090007374
申请日：2009-01-30
Applicant: 한국전자통신연구원 , 서울대학교산학협력단
IPC: H04B7/14
Abstract: 다중중계기가존재하는상향링크시스템에서네트워크부호화를사용하는협력통신장치및 방법이개시된다. 다중중계기가존재하는상향링크시스템에서네트워크부호화를사용하는협력통신장치의중계기는다수의송신기들로부터다수의송신신호들을수신하는신호수신부와, 다수의송신신호들을수신한수신기로부터다수의송신신호들가운데일부송신신호들에대한재전송요청들을수신하는요청수신부와, 재전송요청들에해당하는일부송신신호들을네트워크부호화하고, 네트워크부호화된신호를수신기로송신하는송신부를포함한다.
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公开(公告)号：KR1020130110587A
公开(公告)日：2013-10-10
申请号：KR1020120032667
申请日：2012-03-29
Applicant: 서울대학교산학협력단
CPC classification number: H04B7/0443 , H04J11/004 , H04L27/2608 , H04L27/2649 , H04W72/082
Abstract: PURPOSE: An efficient resource assignment technique in a multi-user multiple-input multiple-output-orthogonal frequency division multiplexing (MIMO-OFDM) system based on minimum mean square error-successive interference cancellation (MMSE-SIC) is provided to improve frequency efficiency and transmission reliability. CONSTITUTION: An effective channel vector is obtained from a subcarrier of user K by using a null space of a selected user group. A data transfer rate is obtained from the subcarrier of the user K by using the effective channel vector. Transmission power of the subcarrier, which is assigned by using a water-filling method, is obtained after assigning the subcarrier.
Abstract translation: 目的：提供基于最小均方误差连续干扰消除（MMSE-SIC）的多用户多输入多输出正交频分复用（MIMO-OFDM）系统中的高效资源分配技术，以提高频率效率 和传输可靠性。 构成：通过使用所选择的用户组的空白空间，从用户K的子载波获得有效的信道向量。 通过使用有效信道向量从用户K的子载波获得数据传送速率。 在分配子载波之后，获得通过使用充水方法分配的副载波的发送功率。
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公开(公告)号：KR1020080052323A
公开(公告)日：2008-06-11
申请号：KR1020070095440
申请日：2007-09-19
Applicant: 한국전자통신연구원 , 재단법인서울대학교산학협력재단
CPC classification number: H04L27/261 , H04B7/2621 , H04L27/2626
Abstract: An apparatus and a method for controlling a transmission of an uplink sounding signal in an OFDMA/FDD communication system are provided to improve a data transmission rate and a proportional fairness of a proportional fair scheduler by transmitting a sounding signal to terminals based on the proportional fairness. An apparatus for controlling a transmission of an uplink sounding signal in an OFDMA/FDD communication system includes a data sub-band number determination unit(410), and a sounding sub-band number determination unit(420). The data sub-band determination unit determines the number of data sub-bands to be used in a transmission of a data signal through an uplink frame based on a channel gain of each of terminals. The sounding sub-band determination unit determines the number of sounding sub-bands to be used in a sounding signal transmission through the uplink frame in proportion to the number of sub-bands to be used in terminals.
Abstract translation: 提供了一种用于控制OFDMA / FDD通信系统中的上行链路探测信号的传输的装置和方法，以通过基于比例公平性向终端发送探测信号来提高比例公平调度器的数据传输速率和比例公平性 。 一种用于在OFDMA / FDD通信系统中控制上行探测信号的传输的装置包括数据子带号确定单元（410）和探测子带号确定单元（420）。 数据子带确定单元基于每个终端的信道增益来确定通过上行链路帧在数据信号的传输中要使用的数据子带的数量。 探测子波段确定单元与终端中要使用的子带的数量成比例地确定通过上行链路帧的探测信号传输中使用的探测子带的数量。
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公开(公告)号：KR100884750B1
公开(公告)日：2009-02-20
申请号：KR1020070095440
申请日：2007-09-19
Applicant: 한국전자통신연구원 , 재단법인서울대학교산학협력재단
Abstract: 본 발명에서는 직교주파수분할다중접속/주파수분할듀플렉스 (Orthogonal Frequency Division Multiplexing Access/Frequency Division Duplex:OFDMA/FDD) 방식 통신 시스템에서 단말들 각각의 채널 이득을 기초로 각각의 단말이 상향링크 프레임을 통한 데이터 신호 전송시 사용할 데이터 부대역의 개수를 결정하고, 각각의 단말이 사용할 데이터 부대역의 개수에 비례하도록 각각의 단말이 상향링크 프레임을 통한 사운딩 신호 전송시 사용할 사운딩 부대역의 개수를 결정하여 기지국이 단말들에게 사운딩 신호 전송을 허가함으로써 상향링크 패킷 스케줄링을 위해 비례공평 스케줄러를 사용하는 경우 비례공평 스케줄러의 성능을 향상시킬 수 있는 상향링크 사운딩 신호 전송 제어 장치 및 방법을 제공한다.
OFDMA, FDD, 비례공평 스케줄러, 사운딩
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