公开(公告)号：US20110002465A1

公开(公告)日：2011-01-06

申请号：US12809301

申请日：2008-12-09

申请人： Jae-Young Ahn ,  Souhwan Jung ,  Jaeduck Choi ,  Dae-Joon Hwang

发明人： Jae-Young Ahn ,  Souhwan Jung ,  Jaeduck Choi ,  Dae-Joon Hwang

IPC分类号： H04W12/04

CPC分类号： H04L9/0844 ,  H04L9/0836 ,  H04L9/3226 ,  H04L9/3242 ,  H04L63/08 ,  H04L2209/80 ,  H04L2463/062 ,  H04W12/04 ,  H04W12/06 ,  H04W36/0033 ,  H04W36/0038 ,  H04W80/02 ,  H04W80/04

摘要： Integrated handover authentication technology for a next generation network (NGN) environment to which wire-less access technology and mobile IP based mobility control technology are applied is provided. In a method of operating a mobile terminal MN in order to perform the integrated handover authentication in the NGN environment including an access router PAR, a target router NAR, and an authentication(AAA) server. First, a handover authentication key HKNAR which is shared by the mobile terminal and the target router and protects a fast binding update (FBU) message between the mobile terminal and the target router is generated. Then, an authentication request message AAuthReq generated using the handover authentication key HKNAR is transmitted. Thereafter, an authentication success message AAuthResp is received in response to the authentication request message AAuthReq. Accordingly, hierarchical handover can be performed according to the localization of the mobility of the mobile terminal, thereby minimizing the overhead of the authentication (AAA) server.

摘要翻译： 提供了一种适用于无线接入技术和基于移动IP的移动性控制技术的下一代网络（NGN）环境的集成切换认证技术。 在移动终端MN的操作方法中，为了在包括接入路由器PAR，目标路由器NAR和认证（AAA））服务器的NGN环境中执行集成切换认证。 首先，生成由移动终端和目标路由器共享并在移动终端和目标路由器之间保护快速绑定更新（FBU）消息的切换认证密钥HKNAR。 然后，发送使用切换认证密钥HKNAR生成的认证请求消息AAuthReq。 此后，响应于认证请求消息AAuthReq接收到认证成功消息AAuthResp。 因此，可以根据移动终端的移动性的定位来执行分级切换，从而最小化认证（AAA）服务器的开销。

公开(公告)号：US07848296B2

公开(公告)日：2010-12-07

申请号：US11438667

申请日：2006-05-23

申请人： Hee-Soo Lee ,  Jae-Young Ahn ,  Young-Jo Ko ,  Du-Ho Rhee ,  Kwang-Soon Kim

发明人： Hee-Soo Lee ,  Jae-Young Ahn ,  Young-Jo Ko ,  Du-Ho Rhee ,  Kwang-Soon Kim

IPC分类号： H04Q7/00

CPC分类号： H04W52/262 ,  H04B17/24 ,  H04B17/26 ,  H04B17/336 ,  H04B17/373 ,  H04L1/0026 ,  H04L25/0232 ,  H04L27/2601 ,  H04W52/226 ,  H04W52/247 ,  H04W52/346

摘要： Provided are an apparatus and method for generating channel information and apparatus and method for adaptive transmission employing the same. The channel information generation apparatus comprises an estimator for estimating current channel information of a multi-carrier received signal for each path, a short-period channel information generator for predicting channel information after a predetermined minimum transmission delay time based on the current channel information estimated by the estimator to generate short-period channel information, and a long-period channel information generator for deriving statistic information of error between the channel information predicted by the short-period channel information generator and actual channel information at the time of transmission to produce long-period channel information. The invention is applied to mobile communication systems using multi-carrier.

摘要翻译： 提供一种用于产生信道信息的装置和方法，以及采用该信道信息的自适应传输的装置和方法。 信道信息生成装置包括：估计器，用于估计每个路径的多载波接收信号的当前信道信息;短周期信道信息发生器，用于基于由当前信道信息估计的预定最小传输延迟时间来预测信道信息; 用于产生短周期信道信息的估计器和用于导出由短周期信道信息发生器预测的信道信息与传输时的实际信道信息之间的误差的统计信息的长周期信道信息发生器， 期间频道信息。 本发明应用于使用多载波的移动通信系统。

公开(公告)号：US07627050B2

公开(公告)日：2009-12-01

申请号：US10848921

申请日：2004-05-19

申请人： Kwang-Soon Kim ,  Yun-Hee Kim ,  Jae-Young Ahn

发明人： Kwang-Soon Kim ,  Yun-Hee Kim ,  Jae-Young Ahn

IPC分类号： H04B7/02

CPC分类号： H04L1/0026 ,  H04B7/0626 ,  H04B7/066 ,  H04L1/0693 ,  H04W52/241 ,  H04W52/247

摘要： Disclosed is an adaptive transmitting and receiving device and method using frequency division duplexing. A transmitter transmits a preamble or a pilot to a receiver. The receiver estimates a received SNR from the preamble or pilot, determines parameters (received log likelihood ratio parameters) of determining the distribution of the received log likelihood ratio, and feeds them back to the transmitter. The transmitter adaptively determines an antenna method, a modulation method, and a transmit power according to the parameters, and adaptively transmits traffic data to the receiver according to the determined antenna method, the modulation method, and the transmit power.

摘要翻译： 公开了一种使用频分双工的自适应发射和接收装置和方法。 发射机向接收机发射前导码或导频。 接收机估计来自前置码或导频的接收到的SNR，确定确定接收到的对数似然比的分布的参数（接收对数似然比参数），并将其馈送给发射机。 发射机根据参数自适应地确定天线方法，调制方式和发射功率，并根据确定的天线方法，调制方式和发射功率自适应地将业务数据发送到接收机。

公开(公告)号：US20090219801A1

公开(公告)日：2009-09-03

申请号：US12064804

申请日：2006-08-22

申请人： Byung-Jang Jeong ,  Hyo-Jin Lee ,  Jae-Young Ahn

发明人： Byung-Jang Jeong ,  Hyo-Jin Lee ,  Jae-Young Ahn

IPC分类号： H04J11/00

CPC分类号： H04L5/0048 ,  H04L5/0007

摘要： The present invention relates to a transmitter in a frequency division multiple access communication system. The transmitter generates a plurality of pilot symbols, and groups the plurality of pilot symbols into a plurality of groups according to a location of a subcarrier. In addition, the transmitter inverse fast Fourier transforms the pilot symbol in each group, and sequentially outputs a first pilot symbol sequence corresponding to each group. The transmitter generates a plurality of pilot blocks respectively corresponding to the plurality of groups, and converts the first pilot symbol sequence of each group into a second pilot symbol sequence of a corresponding pilot block among the plurality of pilot blocks.

摘要翻译： 本发明涉及一种频分多址通信系统中的发射机。 发射机产生多个导频符号，并且根据副载波的位置将多个导频符号分组成多个组。 另外，发射机对快速傅立叶逆变换每组中的导频符号，并且顺序地输出与每个组对应的第一导频符号序列。 发射机产生分别与多个组对应的多个导频块，并将各组的第一导频符号序列转换成多个导频块中相应导频块的第二导频符号序列。

公开(公告)号：US20080232320A1

公开(公告)日：2008-09-25

申请号：US12063933

申请日：2006-08-17

申请人： Hee-Soo Lee ,  Jae-Young Ahn ,  Kyung-Hi Chang ,  Joo Heo ,  In-Suk Cha

发明人： Hee-Soo Lee ,  Jae-Young Ahn ,  Kyung-Hi Chang ,  Joo Heo ,  In-Suk Cha

IPC分类号： H04Q7/00 ,  H04L27/28

CPC分类号： H04W16/10 ,  H04W28/22 ,  H04W72/0453

摘要： Provided are a dynamic resource allocation method based on frequency reuse partitioning for an Orthogonal Frequency Division Multiple Access (OFDMA) system, and a frame transmission method therefor. The dynamic resource allocation method includes: a) dividing a coverage into cells based on frequency reuse partitioning; b) selecting a candidate user to receive a channel allocated thereto based on the ratio; c) acquiring distance information for the candidate user; and d) checking whether the candidate user is in an inner or outer cell area based on the distance information. If the candidate user is in the inner cell area, a subchannel group among subchannel groups having a Frequency Reuse Factor (FRF) lower than a threshold value is selected and subcarriers of the selected subchannel group is allocated. If the candidate user is in the outer cell area, a subchannel group among subchannel groups having a FRF higher than the threshold value is selected.

摘要翻译： 提供了一种基于正交频分多址（OFDMA）系统的频率复用分割的动态资源分配方法及其帧传输方法。 动态资源分配方法包括：a）基于频率重用分区将覆盖划分为小区; b）基于所述比率选择候选用户以接收分配给其的信道; c）获取候选用户的距离信息; 以及d）基于距离信息来检查候选用户是否在内部或外部小区区域。 如果候选用户在内部小区区域，则选择具有低于阈值的频率重用因子（FRF）的子信道组之中的子信道组，并且分配所选择的子信道组的子载波。 如果候选用户在外部小区区域，则选择FRF高于阈值的子信道组之中的子信道组。

公开(公告)号：US07395494B2

公开(公告)日：2008-07-01

申请号：US10964122

申请日：2004-10-12

申请人： Sang-Hyun Lee ,  Kwang-Soon Kim ,  Yun-Hee Kim ,  Jae-Young Ahn

发明人： Sang-Hyun Lee ,  Kwang-Soon Kim ,  Yun-Hee Kim ,  Jae-Young Ahn

IPC分类号： G06F11/00

CPC分类号： H03M13/6362 ,  H03M13/1137 ,  H03M13/116 ,  H03M13/1174 ,  H03M13/118

摘要： An LDPC code encoding apparatus includes: a code matrix generator for generating and transmitting a parity-check matrix comprising a combination of square matrices having a unique value on each row and column thereof; an encoding means encoding block LDPC codes according to the parity-check matrix received from the code matrix generator; and a codeword selector for puncturing the encoded result of the encoding means to generate an LDPC codeword. The code matrix generator divides an information word to be encoded into block matrices having a predetermined length to generate a vector information word. The encoding means encodes the block LDPC codes using the parity-check matrix divided into the block matrices and a Tanner graph divided into smaller graphs in correspondence to the parity-check matrix.

摘要翻译： LDPC码编码装置包括：码矩阵生成器，用于生成和发送奇偶校验矩阵，该奇偶校验矩阵包括在其每一行和每一列上具有唯一值的方阵的组合; 编码装置，根据从码矩阵发生器接收到的奇偶校验矩阵，对块LDPC码进行编码; 以及用于对编码装置的编码结果进行删截以生成LDPC码字的码字选择器。 代码矩阵发生器将要编码的信息字划分成具有预定长度的块矩阵以生成向量信息字。 编码装置使用划分为块矩阵的奇偶校验矩阵和对应于奇偶校验矩阵划分成较小图的Tanner图，对块LDPC码进行编码。

公开(公告)号：US07391774B2

公开(公告)日：2008-06-24

申请号：US10695135

申请日：2003-10-27

申请人： Hyoung-Soo Lim ,  Woo-Yong Choi ,  Yong-Sun Kim ,  Jae-Young Ahn

发明人： Hyoung-Soo Lim ,  Woo-Yong Choi ,  Yong-Sun Kim ,  Jae-Young Ahn

IPC分类号： H04L12/28

CPC分类号： H04W76/021 ,  H04L1/0001 ,  H04L1/0083 ,  H04L1/1621 ,  H04L1/1664 ,  H04L5/023 ,  H04L27/2601 ,  H04L27/2608 ,  H04L2001/0093 ,  H04W8/26 ,  H04W28/04 ,  H04W72/042 ,  H04W72/0453 ,  H04W76/10 ,  H04W76/11 ,  H04W76/30

摘要： The MAC frame in a wireless communication system includes a terminal ID allocated to each of multiple terminals. At least one connection ID is allocated to each terminal having the terminal ID, and sub-carrier allocation information is allocated to each connection having the connection ID. The sub-carrier allocation information includes a sub-carrier allocation status for each sub-carrier, and the number of allocated information bits for each sub-carrier. The sub-carrier allocation status and the number of allocated information bits for each sub-carrier can be allocated, by sub-carriers, to the sub-carrier allocation information using a same number of bits; or the information on the sub-carrier allocation status is first allocated to the sub-carrier allocation information and the number of allocated information bits for each sub-carrier is allocated.

公开(公告)号：US20070127359A1

公开(公告)日：2007-06-07

申请号：US10579892

申请日：2004-09-08

申请人： Jae-Young Ahn ,  Kwang-Soon Kim

发明人： Jae-Young Ahn ,  Kwang-Soon Kim

IPC分类号： H04J1/00 ,  H04J11/00

CPC分类号： H04L5/023 ,  H04L27/2608 ,  H04W72/06

摘要： Disclosed is a method for partitioning resource spaces, and allocating physical channels and power in an OFDMA-based cellular system. A resource within a slot is partitioned into resource spaces in common in a plurality of adjacent cells, and the partitioned resource spaces are partitioned into resource sets according to sizes of physical channels in the adjacent cells. The physical channels classified by predetermined characteristics are respectively assigned to the partitioned resource sets within the resource space. Further, the resource space for transmitting traffic channels between two different cells is partitioned into resource spaces so that the traffic channels in the same subspace may be collided with each other, and a power control is applied between the collided channels to control the interference from the adjacent cells.

摘要翻译： 公开了一种在基于OFDMA的蜂窝系统中分配资源空间以及分配物理信道和功率的方法。 时隙内的资源在多个相邻小区中共同划分为资源空间，并且根据相邻小区中的物理信道的大小将划分的资源空间划分为资源集。 通过预定特性分类的物理信道分别分配给资源空间内的分区资源集。 此外，用于在两个不同小区之间传输业务信道的资源空间被划分为资源空间，使得相同子空间中的业务信道可能相互冲突，并且在冲突信道之间应用功率控制以控制来自 相邻细胞。

公开(公告)号：US20050149840A1

公开(公告)日：2005-07-07

申请号：US10964122

申请日：2004-10-12

申请人： Sang-Hyun Lee ,  Kwang-Soon Kim ,  Yun-Hee Kim ,  Jae-Young Ahn

发明人： Sang-Hyun Lee ,  Kwang-Soon Kim ,  Yun-Hee Kim ,  Jae-Young Ahn

IPC分类号： G06F11/00 ,  H03M13/00 ,  H03M13/11

CPC分类号： H03M13/6362 ,  H03M13/1137 ,  H03M13/116 ,  H03M13/1174 ,  H03M13/118

摘要： An LDPC code encoding apparatus includes: a code matrix generator for generating and transmitting a parity-check matrix comprising a combination of square matrices having a unique value on each row and column thereof; an encoding means encoding block LDPC codes according to the parity-check matrix received from the code matrix generator; and a codeword selector for puncturing the encoded result of the encoding means to generate an LDPC codeword. The code matrix generator divides an information word to be encoded into block matrices having a predetermined length to generate a vector information word. The encoding means encodes the block LDPC codes using the parity-check matrix divided into the block matrices and a Tanner graph divided into smaller graphs in correspondence to the parity-check matrix.

摘要翻译： LDPC码编码装置包括：码矩阵生成器，用于生成和发送奇偶校验矩阵，该奇偶校验矩阵包括在其每一行和每一列上具有唯一值的方阵的组合; 编码装置，根据从码矩阵发生器接收到的奇偶校验矩阵，对块LDPC码进行编码; 以及用于对编码装置的编码结果进行删截以生成LDPC码字的码字选择器。 代码矩阵发生器将要编码的信息字划分成具有预定长度的块矩阵以生成向量信息字。 编码装置使用划分为块矩阵的奇偶校验矩阵和对应于奇偶校验矩阵划分成较小图的Tanner图，对块LDPC码进行编码。

公开(公告)号：US06501743B1

公开(公告)日：2002-12-31

申请号：US09421994

申请日：1999-10-20

申请人： Won-Ho Kim ,  Jae-Young Ahn ,  Yong-Hoon Cho ,  Seong-Pal Lee

发明人： Won-Ho Kim ,  Jae-Young Ahn ,  Yong-Hoon Cho ,  Seong-Pal Lee

IPC分类号： H04B7212

CPC分类号： H04B7/2125

摘要： An apparatus and method of network synchronization for synchronous burst transmission in an asymmetric two-way satellite communication system. Network synchronization information is broadcast to all remote stations using an adaptation field structure that is defined at the MPEG-2 system standard. In addition, all remote stations maintain synchronization between the central station and remote stations using network synchronization information that is located at a program clock reference part and an original program clock reference part of the adaptation field structure.

摘要翻译： 一种不对称双向卫星通信系统中同步突发传输的网络同步装置和方法。 使用在MPEG-2系统标准中定义的适配场结构将网络同步信息广播到所有远程站。 此外，所有远程站使用位于适配场结构的程序时钟参考部分和原始程序时钟参考部分的网络同步信息来保持中心站和远程站之间的同步。