公开(公告)号：US20090268841A1

公开(公告)日：2009-10-29

申请号：US12439329

申请日：2007-08-30

申请人： Byoung-Gi Kim ,  Kun-Seok Kang ,  Do-Seob Ahn ,  Ho-Jin Lee

发明人： Byoung-Gi Kim ,  Kun-Seok Kang ,  Do-Seob Ahn ,  Ho-Jin Lee

IPC分类号： H04B7/02 ,  H04L27/00 ,  H04L25/49

CPC分类号： H04B7/18543 ,  H04B7/0667 ,  H04B7/0891 ,  H04L1/0625 ,  H04W52/241

摘要： A power control system and method for communication system using space-time transmit diversity scheme. In the power control method, transmission power information of a plurality of antennas or a plurality of subcarriers is monitored. A new space-time code is generated by concatenating the monitored transmission power information and symbols to be transmitted. Symbols encoded using the generated space-time code are generated and the encoded symbols are transmitted. Accordingly, after determining the transmission power of each antenna, the transmission power information is monitored so that the transmission power information that does not experience the channel gain can be used at a next slot. Therefore, the performance degradation due to the round trip time can be reduced, thereby improving the system capacity and performance.

摘要翻译： 一种使用时空发射分集方案的通信系统的功率控制系统和方法。 在功率控制方法中，监视多个天线或多个子载波的发送功率信息。 通过连接所监视的发送功率信息和要发送的符号来生成新的时空码。 生成使用所生成的时空代码编码的符号，并且发送编码符号。 因此，在确定每个天线的发送功率之后，监视发送功率信息，使得在下一个时隙可以使用不经历信道增益的发送功率信息。 因此，可以降低由于往返时间引起的性能下降，从而提高系统容量和性能。

公开(公告)号：US20080298511A1

公开(公告)日：2008-12-04

申请号：US12093614

申请日：2006-07-13

申请人： Sun-Heui Ryoo ,  Kun-Seok Kang ,  Do-Seob Ahn

发明人： Sun-Heui Ryoo ,  Kun-Seok Kang ,  Do-Seob Ahn

IPC分类号： H04L27/06

CPC分类号： H04L27/233 ,  H03M13/25 ,  H04L25/067 ,  H04L27/3854

摘要： Provided is a soft-output demodulation apparatus and method having a relatively low complexity and capable of acquiring a channel reliability value to be inputted to an iterative decoder, in a digital communication system. The apparatus includes: a storage unit for pre-determining and storing opposite-bit nearest constellation points corresponding to constellation points by dividing a constellation point region according to a modulation scheme; a quantizer for quantizing a channel reception signal; a region decider for deciding the nearest constellation point corresponding to the quantized channel reception signal; a reverse constellation point detector for detecting an opposite-bit nearest constellation point corresponding to the decided nearest constellation point from the values pre-stored in the storage unit; and a soft-output demodulation value calculator for calculating a soft-output demodulation value based on the nearest constellation point, the nearest constellation point of the opposite bit, and the channel reception signal.

摘要翻译： 提供了一种在数字通信系统中具有相对低的复杂度并且能够获取要输入到迭代解码器的信道可靠性值的软输出解调设备和方法。 该装置包括：存储单元，用于通过根据调制方案划分星座点区域来预先确定和存储对应于星座点的对位最近的星座点; 用于量化频道接收信号的量化器; 区域决定器，用于决定与量化信道接收信号对应的最近的星座点; 反向星座点检测器，用于从预先存储在存储单元中的值检测对应于所确定的最近星座点的相对位最近星座点; 以及软输出解调值计算器，用于基于最近的星座点，相对位的最近星座点和信道接收信号来计算软输出解调值。

公开(公告)号：US20130215861A1

公开(公告)日：2013-08-22

申请号：US13881436

申请日：2011-10-27

申请人： Seung Hyun Nam ,  Hee Wook Kim ,  Tae Chul Hong ,  Kun Seok Kang ,  Bon Jun Ku ,  Do Seob Ahn

发明人： Seung Hyun Nam ,  Hee Wook Kim ,  Tae Chul Hong ,  Kun Seok Kang ,  Bon Jun Ku ,  Do Seob Ahn

IPC分类号： H04W74/08

CPC分类号： H04W74/0833 ,  H04W56/0005 ,  H04W56/0085

摘要： According to the present invention, a random access method between a terminal and a base station comprises: a system information transmission step in which the base station transmits, to the terminal, system information including route values sequentially selected from among a set of routes; a random access preamble transmission step in which the terminal generates a random access preamble on the basis of the system information and transmits the generated random access preamble to the base station; a period setup step in which the base station sets a period available for an arrival of the random access preamble; and a random access preamble detection step in which the base station detects the random access preamble in said available period.

摘要翻译： 根据本发明，终端和基站之间的随机接入方法包括：系统信息发送步骤，其中基站向终端发送包括从一组路由中顺序选择的路由值的系统信息; 随机接入前导码发送步骤，其中所述终端基于所述系统信息生成随机接入前导，并将所生成的随机接入前导码发送到所述基站; 周期设置步骤，其中所述基站设置可用于所述随机接入前同步码的到达的时段; 以及随机接入前导码检测步骤，其中所述基站在所述可用时段中检测所述随机接入前导码。

公开(公告)号：US08396411B2

公开(公告)日：2013-03-12

申请号：US12744840

申请日：2008-08-04

申请人： Hee Wook Kim ,  Kun Seok Kang ,  Do-Seob Ahn ,  Ho Jin Lee

发明人： Hee Wook Kim ,  Kun Seok Kang ,  Do-Seob Ahn ,  Ho Jin Lee

IPC分类号： H04W4/20 ,  H04H20/71

CPC分类号： H04L5/14 ,  H04H20/08 ,  H04H20/72 ,  H04H20/74 ,  H04W72/04

摘要： The present invention relates to a communication method in a mobile communication system. An exemplary embodiment of the present invention provides a mobile satellite communication system having a complementary terrestrial component among various mobile communication systems. The mobile satellite communication system can simultaneously provide a communication service and a broadcasting service to a terminal according to integration between communication and broadcasting. Different signal transmission methods are used between the complementary terrestrial component and a satellite. Specifically, a time division duplex method and a frequency division duplex method are used together and resources are allocated. As a result, system throughput can be increased, and local broadcasting contents can be effectively transmitted to the terminal.

摘要翻译： 本发明涉及移动通信系统中的通信方法。 本发明的示例性实施例提供了一种在各种移动通信系统中具有互补地面分量的移动卫星通信系统。 根据通信和广播之间的整合，移动卫星通信系统可以同时向终端提供通信服务和广播业务。 互补地面部件与卫星之间采用不同的信号传输方式。 具体地说，分时双工方式和频分双工方式一起使用，分配资源。 结果，可以提高系统吞吐量，并且本地广播内容可以有效地传送到终端。

公开(公告)号：US08089937B2

公开(公告)日：2012-01-03

申请号：US12445559

申请日：2007-10-17

申请人： Tae Chul Hong ,  Kun Seok Kang ,  Do Seob Ahn ,  Ho Jin Lee

发明人： Tae Chul Hong ,  Kun Seok Kang ,  Do Seob Ahn ,  Ho Jin Lee

IPC分类号： H04W4/00 ,  H04Q7/22

CPC分类号： H04B7/18563 ,  H04W36/30 ,  H04W84/06 ,  Y02D70/142 ,  Y02D70/446

摘要： A method and mobile communication terminal for handover in a mobile communication network including at least one mobile communication base station and a communication satellite. The handover method includes the steps of: (a) calculating a signal power received from a currently communicating mobile communication base station among the at least one mobile communication base station, (b) calculating a signal power received from each of the communication satellite and the at least one mobile communication base station except the base station of step (a), (c) selecting a mobile communication base station having the highest among the calculated signal powers except the signal power received from the communication satellite and the signal power received from the base station of step (a), and (d) when the signal power calculated in step (a) is below a predetermined minimum handover power, a difference between the signal power of the selected mobile communication base station and the signal power calculated in step (a) is equal to or below a first terrestrial handover sensitivity, and there is no other mobile communication base station capable of communicating with the mobile communication terminal, performing handover to the communication satellite.

摘要翻译： 一种用于在包括至少一个移动通信基站和通信卫星的移动通信网络中切换的方法和移动通信终端。 切换方法包括以下步骤：（a）计算在所述至少一个移动通信基站中从当前通信的移动通信基站接收的信号功率，（b）计算从每个通信卫星接收的信号功率和 除了步骤（a）的基站之外的至少一个移动通信基站，（c）选择除了从通信卫星接收到的信号功率之外的计算的信号功率中具有最高的移动通信基站和从 步骤（a）的基站和（d）当在步骤（a）中计算的信号功率低于预定的最小切换功率时，所选择的移动通信基站的信号功率与在步骤 （a）等于或低于第一地面切换灵敏度，并且没有能够与其通信的其他移动通信基站 移动通信终端，执行到通信卫星的切换。

公开(公告)号：US20090241005A1

公开(公告)日：2009-09-24

申请号：US12442020

申请日：2007-09-21

申请人： Tae-Chul Hong ,  Kun-Seok Kang ,  Do-Seob Ahn ,  Ho-Jin Lee

发明人： Tae-Chul Hong ,  Kun-Seok Kang ,  Do-Seob Ahn ,  Ho-Jin Lee

IPC分类号： H04L1/18 ,  G06F11/14

CPC分类号： H04L1/1887 ,  H04L1/1819 ,  H04L1/1835

摘要： There is provided a method for packet scheduling in a selective hybrid automatic repeat request (HARQ) including the steps of: increasing a priority of a receiver buffer after a packet is transmitted to the receiver; receiving a feedback packet for the transmitted packet and determining whether the feedback packet is an ACK packet or a NACK packet; lowering the priority of the receiver buffer if the feedback packet is an ACK packet; determining whether the feedback packet is a NACK packet for initial transmission or the feedback packet is a NACK packet for retransmission if the feedback packet is the NACK packet, increasing the priority of the receiver buffer if the feedback packet is the NACK packet for the initial transmission, and lowering the priority of the receiver buffer if the feedback packet is the NACK packet for retransmission; and scheduling packets after calculating a priority of each receiver buffer by performing the priority increasing step to the determining step for all of receivers.

摘要翻译： 提供了一种用于选择性混合自动重复请求（HARQ）中的分组调度的方法，包括以下步骤：在分组被发送到接收机之后增加接收机缓冲器的优先级; 接收所发送的分组的反馈分组，并确定反馈分组是ACK分组还是NACK分组; 如果反馈分组是ACK分组，则降低接收机缓冲器的优先级; 确定反馈分组是否是用于初始传输的NACK分组，或者如果反馈分组是NACK分组，则反馈分组是用于重传的NACK分组，如果反馈分组是用于初始传输的NACK分组，则增加接收机缓冲器的优先级 并且如果反馈分组是用于重发的NACK分组，则降低接收机缓冲器的优先级; 以及通过对所有接收机执行到确定步骤的优先级增加步骤来计算每个接收器缓冲器的优先级之后调度分组。