公开(公告)号：US08284680B2

公开(公告)日：2012-10-09

申请号：US12717534

申请日：2010-03-04

申请人： Sangwoo Lee ,  Hyun Seo Oh ,  June Koo Rhee ,  Yonghwan Bang ,  Dujeong Lee

发明人： Sangwoo Lee ,  Hyun Seo Oh ,  June Koo Rhee ,  Yonghwan Bang ,  Dujeong Lee

IPC分类号： H04L12/26

CPC分类号： H04L1/1845 ,  H04L1/1819 ,  H04L1/1867 ,  H04L2001/0093

摘要： The present invention provides a method and apparatus for multicast transmission of a transmitting station in a wireless network. The method according to the present invention transmits a plurality of data packets to a plurality of receiving stations, receives information on loss of the plurality of the data packets from at least one of the plurality of the receiving stations, codes the plurality of the data packets into a single coded data packet based on the information on the loss of the plurality of the data packets and transmits an error control frame including the coded data packet to the plurality of the receiving stations. Therefore, when an error occurs at a data packet that a transmitting station transmits to a plurality of receiving stations by a multicast transmission, a number of retransmission of the data packet can be reduced.

摘要翻译： 本发明提供了一种用于无线网络中的发射台的组播传输的方法和装置。 根据本发明的方法将多个数据分组发送到多个接收站，从多个接收站中的至少一个接收关于多个数据分组丢失的信息，对多个数据分组进行编码 基于关于多个数据分组的丢失的信息将其转换为单个编码数据分组，并将包括编码数据分组的错误控制帧发送到多个接收站。 因此，当发送站通过多播传输向多个接收站发送的数据分组发生错误时，可以减少数据分组的重传次数。

公开(公告)号：US07027421B2

公开(公告)日：2006-04-11

申请号：US09975152

申请日：2001-10-12

申请人： Hyung Gun Park ,  Mun Geon Kyeong ,  Hyun Seo Oh ,  Kyung Hi Chang

发明人： Hyung Gun Park ,  Mun Geon Kyeong ,  Hyun Seo Oh ,  Kyung Hi Chang

IPC分类号： H04B7/216

CPC分类号： H04B1/7075 ,  H01Q1/246 ,  H01Q3/2605 ,  H01Q3/267 ,  H04B7/0842

摘要： This invention relates to a method and apparatus for increasing the performance of searcher by using the array antenna when the signal to interference plus noise ratio is low. The two-dimensional searcher performs the spatial-filtering to reduce the noise and interference components and then correlates the spatial-filtered signal with a pseudo noise (PN) code to thereby detect the incoming signals and acquire the corresponding code timings. Furthermore, the two-dimensional searcher can be used to increase the performance of a finger beamformer in two ways. One is to use searcher beamforming weight as initial finger beamforming weight to increase the convergence speed in the adaptive beamforming algorithms. The other is to reduce an amount of computation in the angle of arrival estimation algorithms by calculating the azimuth power spectrum only for the specific angle range.

公开(公告)号：US06480153B1

公开(公告)日：2002-11-12

申请号：US09995838

申请日：2001-11-29

申请人： Jae Ho Jung ,  Hyeong Geon Park ,  Hyun Seo Oh ,  Mun Geon Kyeong

发明人： Jae Ho Jung ,  Hyeong Geon Park ,  Hyun Seo Oh ,  Mun Geon Kyeong

IPC分类号： H01Q322

CPC分类号： H01Q3/267

摘要： The present invention utilizes a calibration signal weight vector as a response vector corresponding to a predetermined orientation angle of the antenna, thereby reducing an interference signal and enhancing a data communication effectively. The calibration method of an array antenna begins with generating a calibration signal in order to measure a transfer function of an array receiving means. A calibration signal vector is injected into the array receiver/transmitter, after multiplying a divided calibration signal and a predetermined weight vector corresponding to each channel together. The divided calibration signal is obtained by dividing the calibration signal by total number of channels. A calibration coefficient is obtained by using that the transfer function of each channel is estimated by analyzing the signal injected from the array receiver or transmitter. Finally, an interference signal is eliminated, by multiplying the received signal of a baseband and the calibration coefficient together.

摘要翻译： 本发明利用校准信号权重向量作为与天线的预定取向角对应的响应向量，从而有效地减少干扰信号和增强数据通信。 阵列天线的校准方法从生成校准信号开始，以测量阵列接收装置的传递函数。 在将分割的校准信号和对应于每个通道的预定权重向量相乘之后，将校准信号向量注入到阵列接收器/发射器中。 分频校准信号通过将校准信号除以总信道数获得。 通过使用通过分析从阵列接收器或发射器注入的信号来估计每个通道的传递函数来获得校准系数。 最后，通过将基带的接收信号和校准系数相乘来消除干扰信号。

公开(公告)号：US06182260B2

公开(公告)日：2001-01-30

申请号：US09094605

申请日：1998-06-15

申请人： Bub Joo Kang ,  Chae Min Park ,  Jae Ryong Shim ,  Eung Bae Kim ,  Hyun Seo Oh

发明人： Bub Joo Kang ,  Chae Min Park ,  Jae Ryong Shim ,  Eung Bae Kim ,  Hyun Seo Oh

IPC分类号： H03M1329

CPC分类号： H03M13/6356 ,  H03M13/1515 ,  H03M13/158 ,  H03M13/2903 ,  H03M13/2936

摘要： Generally, Reed-Solomon encoding process in the conventional communication system is executed by a Reed-Solomon encoder having different code rates for different data transmission rates. The present invention does not use a Reed-Solomon encoder having different coding rates, but instead uses a Reed-Solomon encoder having the same code rate regardless of data transmission rate. Accordingly, the present invention has the following effects. The present invention maintains same communication quality regarding data services having each different data transmission rate, and can use a single Reed-Solomon encoder.

摘要翻译： 通常，常规通信系统中的里德 - 所罗门编码过程由用于不同数据传输速率的具有不同码率的里德 - 所罗门编码器执行。 本发明不使用具有不同编码率的Reed-Solomon编码器，而是使用具有相同码率的Reed-Solomon编码器，而不管数据传输速率如何。 因此，本发明具有以下效果。 本发明对于具有每个不同数据传输速率的数据业务保持相同的通信质量，并且可以使用单个Reed-Solomon编码器。

公开(公告)号：US20120287913A1

公开(公告)日：2012-11-15

申请号：US13471421

申请日：2012-05-14

申请人： Sangwoo LEE ,  Han Byeog Cho ,  Hyun Kyun Choi ,  Hyun Seo Oh ,  Sunghwan Moon ,  Minseok Kim ,  Jong-Moon Chung ,  Dong-Sun Lim

发明人： Sangwoo LEE ,  Han Byeog Cho ,  Hyun Kyun Choi ,  Hyun Seo Oh ,  Sunghwan Moon ,  Minseok Kim ,  Jong-Moon Chung ,  Dong-Sun Lim

IPC分类号： H04W72/04 ,  H04J3/00

CPC分类号： H04W72/1252 ,  H04W40/20 ,  H04W84/18

摘要： In a wireless multi-hop network, a transmission scheduling apparatus calculates a transmission demand of every node within the wireless multi-hop network, and allocates a time slot to each node by using the transmission demand of each node.

摘要翻译： 在无线多跳网络中，传输调度装置计算无线多跳网络内的每个节点的传输需求，并且通过使用每个节点的传输需求为每个节点分配时隙。

公开(公告)号：US20120028675A1

公开(公告)日：2012-02-02

申请号：US13195365

申请日：2011-08-01

申请人： Sangwoo LEE ,  Hyun Kyun Choi ,  Hyun Seo Oh

发明人： Sangwoo LEE ,  Hyun Kyun Choi ,  Hyun Seo Oh

IPC分类号： H04W36/00

CPC分类号： H04W36/00 ,  H04W36/18 ,  H04W74/00

摘要： A first roadside equipment operates as a transmitting/receiving mode in a control channel interval of an Nth synchronization interval so as to support a handover. In this instance, a second roadside equipment neighboring to the first roadside equipment operates as a receiving mode in the control channel interval of the Nth synchronization interval. The first roadside equipment operates as the receiving mode in a control channel interval of an (N+1)th synchronization interval. In this instance, the second roadside equipment operates as the transmitting/receiving mode in the control channel interval of the (N+1)th synchronization interval.

摘要翻译： 第一路边设备在第N个同步间隔的控制信道间隔中作为发送/接收模式工作，以支持切换。 在这种情况下，与第一路边设备相邻的第二路边设备在第N个同步间隔的控制信道间隔中作为接收模式进行操作。 第一路边设备在第（N + 1）同步间隔的控制信道间隔中作为接收模式进行操作。 在这种情况下，第二路边设备作为第（N + 1）同步间隔的控制信道间隔中的发送/接收模式。

公开(公告)号：US20110306353A1

公开(公告)日：2011-12-15

申请号：US12984837

申请日：2011-01-05

申请人： Min Jung Kim ,  Sangwoo Lee ,  Jong Min Park ,  Kyeong-Soo Han ,  Hyun Kyun Choi ,  Hyun Seo Oh

发明人： Min Jung Kim ,  Sangwoo Lee ,  Jong Min Park ,  Kyeong-Soo Han ,  Hyun Kyun Choi ,  Hyun Seo Oh

IPC分类号： H04W72/06

CPC分类号： H04W48/18 ,  H04W72/06 ,  H04W72/10

摘要： A device for allocating a channel by using wireless access in a vehicular environment in which an onboard unit is provided in a vehicle and at least one roadside unit is provided, receives a service announcement message from at least one roadside unit, uses the service announcement message to generate an available service table, determines whether the available service table has roadside unit entries for transmitting the service announcement message, and if so, compares average RSSI provided by the roadside units to select a roadside unit to access, selects a channel that corresponds to the service provider ID with the highest priority from among the service provided by the selected roadside unit, and assigns the selected channel as a service channel to exchange information with the roadside unit.

摘要翻译： 一种用于通过在车辆中提供车载单元的车辆环境中使用无线接入和至少一个路侧单元来分配频道的设备，从至少一个路侧单元接收服务通知消息，使用服务通知消息 生成可用服务表，确定可用服务表是否具有用于发送服务通知消息的路侧单元条目，如果是，则比较由路边单元提供的平均RSSI以选择要接入的路侧单元，选择对应于 从所选择的路侧单元提供的服务中具有最高优先级的服务提供商ID，并且将所选择的频道分配为服务信道以与路侧单元交换信息。

公开(公告)号：US07043272B2

公开(公告)日：2006-05-09

申请号：US10025780

申请日：2001-12-26

申请人： Hyeong Geun Park ,  Hyun Seo Oh ,  Mun Geon Kyeong

发明人： Hyeong Geun Park ,  Hyun Seo Oh ,  Mun Geon Kyeong

IPC分类号： H04M1/00

CPC分类号： H04B7/0408 ,  G01S3/30 ,  H04B7/0617

摘要： Disclosed are an apparatus for forward beamforming using a terminal feedback and a method thereof. The base station estimates an angle of arrival (AOA) range of a user signal from reverse link received data and calculates a plurality of beamforming weights steering the estimated AOA range. Then, the base station transmits a user pilot signal by sequentially using the plurality of beamforming weights at different time areas through a control channel to estimate a forward channel conditions. A terminal calculates the user pilot signal power for all fingers at the respective time areas and feeds a time area number corresponding to the greatest power back to the base station. The base station transmits a data channel signal using a beamforming weight corresponding to the time area number fed back from the terminal.

公开(公告)号：US08774033B2

公开(公告)日：2014-07-08

申请号：US13247079

申请日：2011-09-28

申请人： Cheon In Oh ,  Kyeong-Soo Han ,  Hyun Seo Oh ,  Hyun Kyun Choi

发明人： Cheon In Oh ,  Kyeong-Soo Han ,  Hyun Seo Oh ,  Hyun Kyun Choi

IPC分类号： G01R31/08

CPC分类号： H04W74/0833 ,  H04L45/3065 ,  H04W4/046 ,  H04W4/90 ,  H04W72/12

摘要： In a vehicle communication system, a frame transmitting apparatus gives a transmission opportunity to an emergency frame received from an upper layer without EDCA (Enhanced Distributed Channel Access), and gives a transmission opportunity to a generic frame received from an upper layer through EDCA.

摘要翻译： 在车辆通信系统中，帧发送装置向没有EDCA（增强分布式信道接入）的上层接收到的紧急帧提供发送机会，并且通过EDCA向从上层接收的通用帧给出发送机会。

公开(公告)号：US08483700B2

公开(公告)日：2013-07-09

申请号：US12984837

申请日：2011-01-05

申请人： Min Jung Kim ,  Sangwoo Lee ,  Jong Min Park ,  Kyeong-Soo Han ,  Hyun Kyun Choi ,  Hyun Seo Oh

发明人： Min Jung Kim ,  Sangwoo Lee ,  Jong Min Park ,  Kyeong-Soo Han ,  Hyun Kyun Choi ,  Hyun Seo Oh

IPC分类号： H04W72/00

CPC分类号： H04W48/18 ,  H04W72/06 ,  H04W72/10

摘要： A device for allocating a channel by using wireless access in a vehicular environment in which an onboard unit is provided in a vehicle and at least one roadside unit is provided, receives a service announcement message from at least one roadside unit, uses the service announcement message to generate an available service table, determines whether the available service table has roadside unit entries for transmitting the service announcement message, and if so, compares average RSSI provided by the roadside units to select a roadside unit to access, selects a channel that corresponds to the service provider ID with the highest priority from among the service provided by the selected roadside unit, and assigns the selected channel as a service channel to exchange information with the roadside unit.

摘要翻译： 一种用于通过在车辆中提供车载单元的车辆环境中使用无线接入和至少一个路侧单元来分配频道的设备，从至少一个路侧单元接收服务通知消息，使用服务通知消息 生成可用服务表，确定可用服务表是否具有用于发送服务通知消息的路侧单元条目，如果是，则比较由路边单元提供的平均RSSI以选择要接入的路侧单元，选择对应于 从所选择的路侧单元提供的服务中具有最高优先级的服务提供商ID，并且将所选择的频道分配为服务信道以与路侧单元交换信息。