公开(公告)号：US20130182656A1

公开(公告)日：2013-07-18

申请号：US13551160

申请日：2012-07-17

申请人： Jung Hyun Kim ,  Ji Hung Kim ,  Hyun Jae Kim ,  Kwang Jae Lim ,  Dong Seung Kwon

发明人： Jung Hyun Kim ,  Ji Hung Kim ,  Hyun Jae Kim ,  Kwang Jae Lim ,  Dong Seung Kwon

IPC分类号： H04W56/00 ,  H04W72/00

CPC分类号： H04W56/001

摘要： The embodiments of the present invention are directed to a method and apparatus that synchronize radio nodes using preambles in a radio communication system. An embodiment of the present invention relates to a method of transmitting preambles by a radio node. The method includes generating a first preamble indicating a system bandwidth and a carrier configuration, generating a second preamble indicating a segment identifier used for obtaining a node identifier, allocating the first preamble to a first preamble carrier set, allocating the second preamble to a second preamble carrier set corresponding to the segment identifier, and transmitting the first preamble to a receiving node through the first preamble carrier set and the second preamble to the receiving node through the second preamble carrier set.

摘要翻译： 本发明的实施例涉及一种在无线电通信系统中使用前导码同步无线电节点的方法和装置。 本发明的实施例涉及一种由无线节点发送前导码的方法。 该方法包括生成指示系统带宽和载波配置的第一前导码，产生指示用于获得节点标识符的分段标识符的第二前导码，将第一前同步码分配给第一前导码载波集合，将第二前同步码分配给第二前同步码 载波集合，并且通过第一前导码载波集合和第二前导码通过第二前导码载波集合将第一前导码发送到接收节点。

公开(公告)号：US20120155304A1

公开(公告)日：2012-06-21

申请号：US13326822

申请日：2011-12-15

申请人： Wooram SHIN ,  Hyun-jae Kim ,  Anseok Lee ,  Keun Young Kim ,  Kwang Jae Lim ,  Dong Seung Kwon

发明人： Wooram SHIN ,  Hyun-jae Kim ,  Anseok Lee ,  Keun Young Kim ,  Kwang Jae Lim ,  Dong Seung Kwon

IPC分类号： H04L12/28 ,  H04L12/26

CPC分类号： H04W72/1278 ,  H04W48/08 ,  H04W74/008 ,  H04W84/18

摘要： In an orthogonal frequency division multiple access (OFDMA)-based wireless mesh network, a communication node receives information regarding a next transmission time of a 1-hop node and a 2-top node through the 1-hop node, calculates next transmission intervals of the 1-hop node and the 2-hop node, determines a next transmission time of the communication node by using the next transmission intervals of the 1-hop node and the 2-hop node, and then transmits, to an 1-hop node of the communication node, the information of the next transmission time together with the information of the transmission time of the 1-hop node, received from the 1-hop node.

摘要翻译： 在基于正交频分多址（OFDMA）的无线网状网络中，通信节点通过1跳节点接收关于1跳节点和2顶节点的下一个传输时间的信息，计算下一个传输间隔 1跳节点和2跳节点通过使用1跳节点和2跳节点的下一个传输间隔来确定通信节点的下一个传输时间，然后发送到1跳节点 通信节点的信息，下一个传输时间的信息以及从1跳节点接收的1跳节点的传输时间的信息。

公开(公告)号：US07920503B2

公开(公告)日：2011-04-05

申请号：US10724346

申请日：2003-11-26

申请人： Kwang Jae Lim ,  Soo Young Kim ,  Deock Gil Oh

发明人： Kwang Jae Lim ,  Soo Young Kim ,  Deock Gil Oh

IPC分类号： H04B7/185 ,  H04B7/216 ,  H04B7/19

CPC分类号： H04B7/2041 ,  H04B7/216

摘要： Provided are a packet transmission method for transmitting packets in a forward link of a multibeam satellite communication system and a computer-readable recording medium for recording a program that implements the method. The packet transmission method transmitting packets to mobile stations in a forward link of a multibeam satellite communication system, comprising the steps of: wherein downlink beams of a satellite share an orthogonal spreading code set for transmitting packets to the mobile stations, a) generating downlink beam signals by using an identical structure for the radio frames transmitted through the downlink beams and an identical pseudo-noise (PN) scrambling code for generating downlink beam signals; and b) synchronizing transmission timings of frames, symbols and spread chips on the downlink beam signals.

摘要翻译： 提供了一种用于在多波束卫星通信系统的前向链路中发送分组的分组传输方法和用于记录实现该方法的程序的计算机可读记录介质。 所述分组传输方法向多个卫星通信系统的前向链路中的移动站发送分组，包括以下步骤：卫星的下行链路波束共享用于向所述移动台发送分组的正交扩频码集，a）生成下行链路波束 通过对通过下行链路波束发送的无线电帧使用相同结构的信号和用于生成下行链路波束信号的相同伪噪声（PN）扰码; 以及b）在下行链路波束信号上同步帧，符号和扩展码片的发送定时。

公开(公告)号：US06925113B2

公开(公告)日：2005-08-02

申请号：US09875351

申请日：2001-06-05

申请人： Soo Young Kim ,  Kwang Jae Lim ,  Tae Gon Kwon ,  Hyoung Soo Lim

发明人： Soo Young Kim ,  Kwang Jae Lim ,  Tae Gon Kwon ,  Hyoung Soo Lim

IPC分类号： H04B7/15 ,  H04L1/00 ,  H04L1/20 ,  H04B11/00 ,  H04B1/00 ,  H04B7/185

CPC分类号： H04L1/0015 ,  H04B7/18513 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0025 ,  H04L1/0066 ,  H04L1/20

摘要： A rain attenuation compensation method that includes estimating a signal-to-noise (S/N) ratio from PSK-modulated receiving signal at a receiving end; predicting a signal-to-noise (S/N) ratio of the next time point on the basis of the signal-to-noise (S/N) ratio values of the past and present time points; and determining which of transmission methods is adequate to the predicted signal-to-noise (S/N) ratio of the next time point. If the switching of the transmission method is determined, a control signal for inquiring the change of the transmission method is transmitted to a transmitting and a receiving end. Data is then transmitted by the switched transmission method.

摘要翻译： 一种雨衰补偿方法，包括从接收端的PSK调制接收信号估计信噪比（S / N）比; 基于过去和现在的时间点的信噪比（S / N）比值来预测下一个时间点的信噪比（S / N）比; 并且确定哪个传输方法对于下一个时间点的预测信噪比（S / N）是足够的。 如果确定了传输方法的切换，则用于询问发送方法的改变的控制信号被发送到发送和接收端。 然后通过切换传输方法传输数据。

公开(公告)号：US08724567B2

公开(公告)日：2014-05-13

申请号：US13194236

申请日：2011-07-29

申请人： Wooram Shin ,  Hyun Jae Kim ,  Anseok Lee ,  Ji Hyung Kim ,  Keun Young Kim ,  Kwang Jae Lim ,  Dong Seung Kwon

发明人： Wooram Shin ,  Hyun Jae Kim ,  Anseok Lee ,  Ji Hyung Kim ,  Keun Young Kim ,  Kwang Jae Lim ,  Dong Seung Kwon

IPC分类号： H04W4/00

CPC分类号： H04L27/2602 ,  H04W72/1263 ,  H04W74/0833 ,  H04W84/18

摘要： Provided is a frame structure designed for distributed access control and OFDMA transmission in a wireless mesh network. Also, a communication method and a network node based on the frame structure are provided. Mesh nodes included in the wireless mesh network may use the frame structure and thus, may have a high prospect of transmitting a network configuration information message and scheduling information for obtaining a resource. Also, a scheduling process of the mesh nodes may be completed within a short period based on the frame structure.

摘要翻译： 提供了一种为无线网状网络中的分布式访问控制和OFDMA传输而设计的帧结构。 此外，提供了基于帧结构的通信方法和网络节点。 包括在无线网状网络中的网状节点可以使用帧结构，因此可能具有发送网络配置信息消息和用于获取资源的调度信息的高前景。 此外，可以基于帧结构在短时间内完成网状节点的调度处理。

公开(公告)号：US20120135748A1

公开(公告)日：2012-05-31

申请号：US13245963

申请日：2011-09-27

申请人： Meong-Hun LEE ,  Yoon Ju Lee ,  DongSeung Kwon ,  Kwang Jae Lim ,  Sung Hoon Kim

发明人： Meong-Hun LEE ,  Yoon Ju Lee ,  DongSeung Kwon ,  Kwang Jae Lim ,  Sung Hoon Kim

IPC分类号： H04W24/00

CPC分类号： H04W24/08 ,  H04W4/02 ,  H04W4/185

摘要： A communication quality visualization information providing system acquires a communication quality, generates communication quality visualization information by mapping the acquired communication quality information to geographic information, and provides corresponding communication quality visualization information according to a user request.

摘要翻译： 通信质量可视化信息提供系统获取通信质量，通过将所获取的通信质量信息映射到地理信息来生成通信质量可视化信息，并且根据用户请求提供对应的通信质量可视化信息。

公开(公告)号：US20110206033A1

公开(公告)日：2011-08-25

申请号：US13032129

申请日：2011-02-22

申请人： Dong Hyun AHN ,  Choongil Yeh ,  DongSeung Kwon ,  Kwang Jae Lim ,  Jihyung Kim ,  Young Seog Song ,  Wooram Shin

发明人： Dong Hyun AHN ,  Choongil Yeh ,  DongSeung Kwon ,  Kwang Jae Lim ,  Jihyung Kim ,  Young Seog Song ,  Wooram Shin

IPC分类号： H04W56/00

CPC分类号： H04W74/0816 ,  H04B7/2656 ,  H04W28/26

摘要： In a wireless communication system, when a transmission node has data to be transmitted to a reception node, it checks an acknowledgement slot of the current communication frame and transmits information regarding a reception available acknowledgement slot to the reception node through a request-to-send (RTS) slot in the current communication frame, and the reception node transmits information regarding the data slot available for receiving among at least one data slot corresponding to the reception available acknowledgement slot to the transmission node through a clear-to-send (CTS) slot corresponding to the data request slot in the current communication frame. Thereafter, the transmission node transmits data to the reception node through a reservation data slot of the subsequent communication frame until the message transmission fails or finishes.

摘要翻译： 在无线通信系统中，当传输节点具有要发送到接收节点的数据时，它检查当前通信帧的确认时隙，并通过请求发送将关于接收可用确认时隙的信息发送到接收节点 （RTS）时隙，并且接收节点通过清除发送（CTS）向发送节点发送关于可用于接收的数据时隙的信息到与发送节点对应的至少一个数据时隙中， 与当前通信帧中的数据请求时隙对应的时隙。 此后，传输节点通过后续通信帧的预留数据时隙向接收节点发送数据，直到消息传输失败或完成为止。

公开(公告)号：US07554937B2

公开(公告)日：2009-06-30

申请号：US10717799

申请日：2003-11-19

申请人： Kwang Jae Lim ,  Soo Young Kim ,  Deock Gil Oh

发明人： Kwang Jae Lim ,  Soo Young Kim ,  Deock Gil Oh

IPC分类号： H04B7/185 ,  H04Q7/20 ,  H04B7/216 ,  H04B7/212

CPC分类号： H04B7/1858 ,  Y02D70/1244 ,  Y02D70/446

摘要： Provided is an adaptive packet transmission method in a cellular mobile communication system using a multibeam satellite. The method includes the steps of: a) being periodically reported, from mobile stations, of average receiving power levels of beam pilot signals transmitted in a plurality of beams; b) estimating a path gain between beams and the mobile station based on the reported average power levels of beam pilot signals; c) determining priorities for packets to be transmitted to each of the mobile stations; d) selecting a beam requiring the lowest transmission power for transmitting the packet having the highest priority, and allocating the lowest power required for satisfying a predetermined packet reception quality when the packet is transmitted in the selected radio resource, by using the path gain estimated for each of the mobile stations; and e) if the radio resources and/or the transmission power that can be used are not sufficient or if there is a packet to be allocated, performing the step c).

摘要翻译： 提供了一种使用多波束卫星的蜂窝移动通信系统中的自适应分组传输方法。 该方法包括以下步骤：a）从移动台周期性地报告在多个波束中发射的波束导频信号的平均接收功率电平; b）基于所报告的波束导频信号的平均功率电平来估计波束与移动台之间的路径增益; c）确定要发送到每个移动站的分组的优先级; d）选择需要最低发送功率的波束来发送具有最高优先级的分组，并且在所选择的无线电资源中发送分组时，分配满足预定分组接收质量所需的最低功率，通过使用估计的路径增益 每个移动台; 以及e）如果无线电资源和/或可使用的传输功率不足或者如果存在要分配的分组，则执行步骤c）。