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公开(公告)号：KR1020130109045A
公开(公告)日：2013-10-07
申请号：KR1020130030015
申请日：2013-03-20
Applicant: 한국전자통신연구원
IPC: H04W56/00
CPC classification number: H04W56/001 , H04W56/0035
Abstract: PURPOSE: A frequency synchronization method in a distributed network is provided to synchronize a carrier frequency of a node which enters a distributed network with a carrier frequency of the network which the node has entered by adjusting the carrier frequency of the node. CONSTITUTION: Preambles are received from a plurality of nodes which are adjacent to a node (S301). A carrier frequency offset of each node is estimated from the preambles (S302). The average of the estimated offsets is calculated (S304). An adjustment value of the carrier frequency of the whole adjacent nodes is calculated by using the average value (S308). A carrier frequency of the node is adjusted based on the adjustment value. [Reference numerals] (AA) No; (BB) Yes; (S301) Preamble reception; (S302) Frequency offset estimation for each neighboring node; (S303) Preamble reception number > R_th; (S304) Average frequency offset value {tilde over (f)}_i,m (k) calculation; (S305) {tilde over (f)}_i,m (k) calculation number (N_δ_i,m (k)) update; (S306) N_δ_n,l (k-1) and q_n,i (k-1) reception; (S307) Final frequency offset value ({circumflex over (f)}_i,m (k)) calculation; (S308) Carrier wave adjustment value (Δf_i (k)) calculation & adjustment; (S309) Carrier wave adjustment request value (q_i,n (k)) calculation; (S310) N_δ_i,n (k) and q_i,n (k) reception
Abstract translation: 目的：提供分布式网络中的频率同步方法，通过调整节点的载波频率，将进入分布式网络的节点的载波频率与节点已进入的网络的载波频率进行同步。 构成：从与节点相邻的多个节点接收前导码（S301）。 从前导码估计每个节点的载波频率偏移（S302）。 计算估计偏移的平均值（S304）。 通过使用平均值来计算整个相邻节点的载波频率的调整值（S308）。 基于调整值调整节点的载波频率。 （附图标记）（AA）否; （BB）是的; （S301）前导码接收; （S302）每个相邻节点的频率偏移估计; （S303）前导码接收号码> R_th; （S304）平均频率偏移值{（t）），（i），（k）计算; （S305）{tilde over（f）} _ i，m（k）计算号（N_δ_i，m（k））更新; （S306）N_δ_n，l（k-1）和q_n，i（k-1）接收; （S307）最终频率偏移值（{f（f）} _ i，m（k））计算; （S308）载波调整值（Δf_i（k））计算和调整; （S309）载波调整请求值（q_i，n（k））计算; （S310）N_δ_i，n（k）和q_i，n（k）接收
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公开(公告)号：KR1020130063916A
公开(公告)日：2013-06-17
申请号：KR1020110130539
申请日：2011-12-07
Applicant: 한국전자통신연구원
IPC: H04W40/12
CPC classification number: H04W40/12 , H04L45/302 , H04L45/54
Abstract: PURPOSE: A routing method in a wireless communication system is provided to search for a transmission path requesting different quality by using a routing matrix comprising various type quality articles by using the quality of a link and a node. CONSTITUTION: A data demand performance confirmation unit measures the quality of a node and links facing to neighbor nodes. A path determination unit determines a path customized at the performance demand characteristic of data transmitted by using a routing matrix(S1030). The routing matrix comprises one or more quality articles by using the quality of the node and the quality of the links. The path determination unit transmits data by referring to the path(S1040). [Reference numerals] (S1010) Receive data to be transmitted; (S1020) Determine a service flow to which the data to be transmitted is belonged to; (S1030) Deduce the path to a last destination of the data to be transmitted using a routing table; (S1040) Transmit data to the next hop mesh node of the deduced path
Abstract translation: 目的：提供无线通信系统中的路由方法，通过使用链路和节点的质量，通过使用包括各种类型质量文章的路由矩阵来搜索请求不同质量的传输路径。 规定：数据需求性能确认单元测量节点和面向邻居节点的链路的质量。 路径确定单元确定通过使用路由矩阵发送的数据的性能需求特性定制的路径（S1030）。 路由矩阵通过使用节点的质量和链路的质量来包括一个或多个优质的文章。 路径确定单元通过参照路径发送数据（S1040）。 （附图标记）（S1010）接收要发送的数据; （S1020）确定要发送的数据所属的业务流; （S1030）使用路由表推导要发送的数据的最后目的地的路径; （S1040）将数据发送到推导路径的下一跳网格节点
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公开(公告)号：KR1020130019840A
公开(公告)日：2013-02-27
申请号：KR1020110082075
申请日：2011-08-18
Applicant: 한국전자통신연구원
CPC classification number: H04W84/12 , H04W16/02 , H04W88/10 , H04L5/0044 , H04L5/0055
Abstract: PURPOSE: A virtual AP(Access Point) service based WLAN(Wireless Local Area Network) AP system is provided to support multiple channel access based on a VAP(Virtual Access Point) service protocol. CONSTITUTION: A first VAP(510) is a logic entity which communicates with a first station. A second VAP(520) communicates with a second station. The first VAP exchanges a frame for the first station by using a first channel. The second VAP exchanges the frame for the second station by using a second channel. The frequency band of the first channel is not approached to the frequency band of the second channel. [Reference numerals] (51) Address multiplexer; (512) Network interface A; (514,524,534) Interface Q; (515,525,535) Link layer; (52) Port multiplexer; (522) Network interface B; (53) Application unit; (532) Network interface C; (54) Routing agent
Abstract translation: 目的：提供基于虚拟AP（接入点）服务的WLAN（无线局域网）AP系统，以支持基于VAP（虚拟接入点）服务协议的多信道接入。 构成：第一VAP（510）是与第一站进行通信的逻辑实体。 第二VAP（520）与第二站通信。 第一VAP通过使用第一通道来交换第一站的帧。 第二VAP通过使用第二通道来交换第二站的帧。 第一信道的频带不接近第二信道的频带。 （附图标记）（51）地址多路复用器; （512）网络接口A; （514,524,534）接口Q; （515,525,535）链路层; （52）端口多路复用器; （522）网络接口B; （53）申请单位; （532）网络接口C; （54）路由代理
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公开(公告)号：KR101232598B1
公开(公告)日：2013-02-12
申请号：KR1020090056588
申请日：2009-06-24
Applicant: 한국전자통신연구원
Abstract: 에드혹/메쉬(Ad-hoc/mesh) 망에서 성능 개선을 위하여 노드(node) 사이에 동기를 획득하는 방법과 다중 물리 채널 (multiple physical channel) 구성 방법을 제시한다.
에드혹, 메쉬, 슬롯, 멀티 채널-
公开(公告)号：KR101207569B1
公开(公告)日：2012-12-03
申请号：KR1020090021248
申请日：2009-03-12
CPC classification number: H04L1/06 , H04B7/0639 , H04L1/1867 , H04L1/1893
Abstract: 본발명은재전송이필요한신호벡터에대하여유효신호대잡음비(ESNR: Effective Signal to Noise Ratio)가최대가되도록하는전처리행렬을코드북에서선택하여송신단으로피드백한다. 따라서신호벡터의재전송이이루어진후에유효신호대잡음비가최대가되기때문에, 재전송의수신오류확률을최소화할 수있다.
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Patent Agency Ranking
公开(公告)号：KR1020120125691A
公开(公告)日：2012-11-19
申请号：KR1020110043283
申请日：2011-05-09
Applicant: 한국전자통신연구원
CPC classification number: H04L1/1812 , H04L27/26 , H04W84/18
Abstract: PURPOSE: An apparatus and method for feedback in a wireless mesh system are provided to reduce overheads by providing an HARQ(hybrid automatic repeat request) feedback channel for the wireless mesh system. CONSTITUTION: Data is received in a first sub frame. An HFBCH(HARQ feedback channel) is selected to transmit ACK/NACK(acknowledgement/not-acknowledgement) of the data in a second sub frame corresponding to the first sub frame. The ACK/NACK of the data is transmitted in the selected HFBCH. The HFBCH which can be transmitted from the second sub frame has a mapping relation with an LRU(logical resource unit) of the first sub frame. The first sub frame and the second sub frame are included in a frame which can transmit scheduling information and the data.
Abstract translation: 目的：提供一种用于无线网状系统中的反馈的装置和方法，以通过为无线网状系统提供HARQ（混合自动重复请求）反馈信道来减少开销。 规定：在第一个子帧中接收数据。 选择HFBCH（HARQ反馈信道）以在对应于第一子帧的第二子帧中发送数据的ACK / NACK（确认/不确认）。 在所选择的HFBCH中发送数据的ACK / NACK。 可以从第二子帧发送的HFBCH与第一子帧的LRU（逻辑资源单元）具有映射关系。 第一子帧和第二子帧被包括在可以发送调度信息和数据的帧中。
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公开(公告)号：KR101079656B1
公开(公告)日：2011-11-04
申请号：KR1020090123576
申请日：2009-12-11
Abstract: (a) 복수의공중통신국과무선통신을수행할복수의지상단말의위치를획득하는단계와, (b) 상기복수의지상단말의위치에기반하여상기공중통신국각각이상기복수의지상단말의일부또는전부를커버하도록상기공중통신국각각의위치를결정하는단계를포함하는복수의공중통신국과복수의지상단말간의무선통신방법을제공한다. 이방법에의하면, 지상에위치하고있는복수의단말을포함하는무선통신망에서단말이요구하는통신속도, 소모전력및 통신품질등에따라복수의이동가능한통신국을공중에배치함으로써통신수율을높일수 있는효과가있다.
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公开(公告)号：KR1020110100604A
公开(公告)日：2011-09-14
申请号：KR1020110019656
申请日：2011-03-04
Applicant: 한국전자통신연구원
CPC classification number: H04B7/0632 , H04L1/0026 , H04L1/06 , H04L1/1671 , H04L1/1685 , H04L1/1812 , H04L1/1854 , H04L1/1887 , H04L1/1896 , H04B7/0417 , H04B7/0626
Abstract: A mobile station receives a MIMO feedback mode bitmap and information on a MIMO feedback period. The mobile station estimates channel information corresponding to at least one MIMO feedback mode indicated by the MIMO feedback mode bitmap. The mobile station generates a MIMO feedback including the MIMO feedback mode bitmap and the channel information corresponding to the at least one MIMO feedback mode indicated by the MIMO feedback mode bitmap. The mobile station transmits the MIMO feedback at the advent of the MIMO feedback period.
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公开(公告)号：KR1020110098396A
公开(公告)日：2011-09-01
申请号：KR1020100017990
申请日：2010-02-26
IPC: H04B7/26
CPC classification number: H04L25/0222 , H04J11/0023 , H04L25/0202
Abstract: 본 발명은 채널 정보가 주어지지 않은 통신 상황에서 기존의 채널 추정을 이용한 통신 방식에서 문제가 되었던 추정 오류로 인한 문제를 극복할 수 있는 고속 무선 통신망에서 신호 전송에 관한 것이다. 즉, 본 발명에서는 채널 정보가 주어지지 않고 채널이 급격히 변화하는 고속 무선 통신망의 통신 상황에서 채널 추정을 통한 채널 정보 획득의 부담을 줄이고 채널의 영향을 받지 않고 노이즈의 영향만을 받는 신호 영역에 정보를 실어 전송함으로써 전송 효율을 높일 수 있도록 한다.
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公开(公告)号：KR1020110066786A
公开(公告)日：2011-06-17
申请号：KR1020090123576
申请日：2009-12-11
CPC classification number: H04W64/00 , H04W16/18 , H04W28/0247 , H04W64/003
Abstract: PURPOSE: A method for performing wireless communication between an airborne communication nodes and ground terminals are provided to enable a plurality of moveable communication station to relay communications for a plurality of terminals. CONSTITUTION: The location of a plurality of airborne communication nodes and ground terminals are obtained(S900). The location of the airborne communication terminal is determined in order to cover whole or some of ground terminals based on the location information(S930). If an airborne communication node group covers a ground terminal group which covers two or more ground terminals, a communication between the airborne communication node and the ground terminal is performed by a virtual MIMO(Multiple Input Multiple Output)(S960).
Abstract translation: 目的：提供一种用于在机载通信节点和接地终端之间执行无线通信的方法，以使得多个可移动通信站能够中继多个终端的通信。 构成：获得多个机载通信节点和接地终端的位置（S900）。 确定机载通信终端的位置，以便基于位置信息覆盖整个或一些接地终端（S930）。 如果机载通信节点组覆盖覆盖两个或更多个接地终端的接地终端组，则通过虚拟MIMO（多输入多输出）来执行机载通信节点与接地终端之间的通信（S960）。
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