公开(公告)号：US20140185592A1

公开(公告)日：2014-07-03

申请号：US14089200

申请日：2013-11-25

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hyun-jae KIM ,  Jung Hyun KIM ,  Jihyung KIM ,  Kwang Jae LIM ,  DongSeung KWON

IPC: H04W56/00

CPC classification number: H04W56/0015 ,  H04W56/00 ,  H04W84/18

Abstract: In a wireless communication system formed of a plurality of nodes, an arbitrary node receives messages broadcasted from neighbor nodes and calculates amounts of changes in receiving times that are differences between receiving times when the messages are currently received and receiving times when the messages are previously received with respect to the neighbor nodes. The node corrects reference time thereof based on the amounts of changes calculated with respect to the neighbor nodes.

Abstract translation: 在由多个节点形成的无线通信系统中，任意节点接收从邻居节点广播的消息，并且计算接收时间的变化量，这当前消息当前被接收的接收时间和接收时间之间的差异 相对于邻居节点。 该节点基于相对于相邻节点计算出的改变量来校正其参考时间。

公开(公告)号：US20140133413A1

公开(公告)日：2014-05-15

申请号：US14075428

申请日：2013-11-08

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jihyung KIM ,  Jung Hyun KIM ,  Hyun-jae KIM ,  Kwang Jae LIM

IPC: H04W72/08

CPC classification number: H04L27/2657 ,  H04L25/03821 ,  H04L27/2691

Abstract: In order to reduce interference that may be generated when a plurality of signals having different subcarrier intervals are received, 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 are provided. 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.

Abstract translation: 为了减少在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，一种控制具有较大子载波间隔的信号适合于具有较小子载波间隔的信号的方法和一种消除CFO干扰的方法 被提供。 将要由无线终端发送的多个信号的子载波间隔彼此进行比较，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。

公开(公告)号：US20130265898A1

公开(公告)日：2013-10-10

申请号：US13851570

申请日：2013-03-27

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Wooram SHIN ,  Hyun-jae KIM ,  Jihyung KIM ,  Anseok LEE ,  Kwang Jae LIM ,  DongSeung KWON

IPC: H04W72/08

CPC classification number: H04W72/082 ,  H04W72/12

Abstract: In a wireless communication system, a transmitting node selects a simultaneously transmit-unavailable node of a 1-hop node of the transmitting node, and allocates a transmitting resource in transmissible resources, except for a transmission scheduled resource of a simultaneously transmit-unavailable node. Further, a receiving node selects a simultaneously receive-unavailable node of a 1-hop node, which is a transmission target of the receiving node selects a simultaneously transmit-unavailable node of a 1-hop node of the receiving node, and allocates a receiving resource in receivable resources, except for a transmission scheduled resource to a simultaneously transmit-unavailable node of a simultaneously receive-unavailable node of the 1-hop node, which is a transmission target of the receiving node.

Abstract translation: 在无线通信系统中，发送节点选择发送节点的1跳节点的同时发送不可用节点，并且在可发送资源中分配发送资源，除了同时发送不可用节点的发送调度资源。 此外，接收节点选择作为接收节点的发送对象的1跳节点的同时接收不可用节点选择接收节点的1跳节点的同时发送不可用节点，并且分配接收 除了作为接收节点的传输对象的1跳节点的同时接收不可用节点的同时发送不可用节点的传输调度资源之外的可接收资源的资源。

公开(公告)号：US20150080004A1

公开(公告)日：2015-03-19

申请号：US14268456

申请日：2014-05-02

Applicant: Electronics and Telecommunications Research Institute

Inventor： Wooram SHIN ,  Hyun-jae KIM ,  Yong Su LEE ,  Anseok LEE ,  Kwang Jae LIM ,  DongSeung KWON

IPC: H04W16/28 ,  H04W72/02

CPC classification number: H04W16/28 ,  H04B7/022 ,  H04B7/0617 ,  H04B7/0626

Abstract: A beamforming apparatus and method for expanding coverage of a control channel are provided, by which neighboring communication devices are classified according to the number of beams that they can receive, and therefore the frequency or period of beam transmission is adjusted to transmit a control channel by a beamforming method. Hence, an overhead reduction and an increase in transmission rate can be achieved, and coverage holes can be prevented.

Abstract translation: 提供了一种用于扩展控制信道的覆盖的波束成形装置和方法，通过该波束形成装置和方法，根据它们可以接收的波束的数量对相邻的通信设备进行分类，因此调整波束传输的频率或周期以通过 波束形成方法。 因此，可以实现开销降低和传输速率的提高，并且可以防止覆盖孔。

公开(公告)号：US20140293830A1

公开(公告)日：2014-10-02

申请号：US14225619

申请日：2014-03-26

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jung Hyun KIM ,  Jihyung KIM ,  Hyun-jae KIM ,  Kwang Jae LIM ,  DongSeung Kwon

IPC: H04L12/751

CPC classification number: H04L45/02 ,  H04B7/15521 ,  H04L1/0076

Abstract: An information exchange apparatus of each node for sharing information between a plurality of nodes receives request information from an adjacent node and determines an information transmitting node based on information that each node holds and request information from the adjacent node, and an information exchange apparatus of a node that is determined to be an information transmitting node generates candidate transmitting information by performing network coding of at least one information set of held information, determines one of candidate transmitting information sets as transmitting information, and transmits the candidate transmitting information set to the adjacent node.

Abstract translation: 用于在多个节点之间共享信息的每个节点的信息交换装置从相邻节点接收请求信息，并且基于每个节点保存的信息并且从相邻节点请求信息来确定信息发送节点，以及信息交换装置 确定为信息发送节点的节点通过执行至少一个保持信息的信息集合的网络编码来生成候选发送信息，将候选发送信息集合中的一个确定为发送信息，并将候选发送信息集合发送到相邻节点 。

公开(公告)号：US20140293828A1

公开(公告)日：2014-10-02

申请号：US14099192

申请日：2013-12-06

Applicant: Electronics and Telecommunications Research Institute

Inventor： Anseok LEE ,  Wooram SHIN ,  Jihyung KIM ,  Hyun-jae KIM ,  Kwang Jae LIM ,  DongSeung KWON

IPC: H04J3/06

CPC classification number: H04J3/0652 ,  H04W56/002

Abstract: A synchronization group management apparatus of a node recognizes a node belonging to a different group if groups having mobility are moved and located in the same area, and performs an operation of merging the different groups into one group by changing the frame start time and the synchronization reference time of the node.

Abstract translation: 如果具有移动性的组移动并位于同一区域中，则节点的同步组管理装置识别属于不同组的节点，并且通过改变帧开始时间和同步来执行将不同组合并成一组的操作 节点的参考时间。

公开(公告)号：US20140104999A1

公开(公告)日：2014-04-17

申请号：US14052028

申请日：2013-10-11

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jung Hyun KIM ,  Jihyung KIM ,  Hyun-jae KIM ,  Kwang Jae LIM ,  DongSeung KWON

IPC: H04L1/18

CPC classification number: H04L1/1887 ,  H04L1/1607 ,  H04L1/1816 ,  H04L45/28 ,  H04L2001/0093

Abstract: A communication apparatus and a data transmission method of the communication apparatus are disclosed. The communication apparatus receives feedback messages corresponding to failed data from receivers, generates a feedback matrix in response to the feedback messages, selects transmission candidate data from the feedback matrix, performs network coding on the transmission candidate data, and transmits retransmission data generated by the network coding to the receivers. Transmission candidate data is selected from the feedback matrix, and network coding is performed on the transmission candidate data to retransmit data to the receivers.

Abstract translation: 公开了一种通信装置的通信装置和数据传输方法。 通信装置从接收机接收与故障数据对应的反馈消息，响应于反馈消息生成反馈矩阵，从反馈矩阵中选择发送候选数据，对发送候选数据执行网络编码，并发送由网络生成的重发数据 编码到接收机。 从反馈矩阵中选择传输候选数据，并且对传输候选数据执行网络编码以将数据重新发送到接收机。

公开(公告)号：US20130250775A1

公开(公告)日：2013-09-26

申请号：US13851082

申请日：2013-03-26

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jung Hyun KIM ,  Jihyung KIM ,  Hyun-jae KIM ,  Kwang Jae LIM ,  DongSeung KWON

IPC: H04L7/00

CPC classification number: H04L7/0016 ,  H04L27/0014 ,  H04L27/2657 ,  H04L27/2675 ,  H04L2027/0065 ,  H04L2027/0095 ,  H04W56/0035

Abstract: A method and apparatus for synchronizing a carrier frequency of a node included in a distributed network are provided. The apparatus includes a frequency offset estimating unit, an offset average value calculating unit, and a frequency adjustment value calculating unit. The method includes receiving preambles from a plurality of nodes adjacent to the node, estimating offsets of the carrier frequencies from the received preambles for each of the plurality of neighbor nodes, calculating an average value of the estimated offsets, calculating an adjustment value of the carrier frequencies with respect to the entirety of the plurality of neighbor nodes by using the average value, and adjusting a carrier frequency of the node on the basis of the adjustment value.

Abstract translation: 提供了一种用于使包含在分布式网络中的节点的载波频率同步的方法和装置。 该装置包括频率偏移估计单元，偏移平均值计算单元和频率调整值计算单元。 该方法包括从邻近该节点的多个节点接收前导码，从多个相邻节点中的每一个的接收到的前同步码估计载波频率的偏移，计算估计的偏移的平均值，计算载波的调整值 通过使用平均值对多个相邻节点的整体进行频率的调整，并且基于调整值来调整节点的载波频率。