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。

公开(公告)号：US20100050035A1

公开(公告)日：2010-02-25

申请号：US12441277

申请日：2007-09-13

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： H04L1/08 ,  G06F11/14

CPC分类号： H04L1/1819 ,  H04L1/1809

摘要： Provided is a method for preventing consecutive packet errors in a transmitter by combining a hybrid automatic repeat request (HARQ) type II with a selective automatic repeat request (ARQ), including: transmitting a data packet from the transmitter to a receiver; when a negative acknowledgement (NACK) packet corresponding to the data packet is received from the receiver, checking stored information in the NACK packet wherein the stored information represent whether or not the data packet is stored in a buffer; when the data packet is stored in the buffer, transmitting a packet having parity bits to the receiver and storing the data packet in a retransmission queue; and when the data packet is not stored in the buffer, re-transmitting the data packet and maintaining the data packet stored in a transmission queue.

摘要翻译： 提供了一种通过将II型混合自动重复请求（HARQ）与选择性自动重传请求（ARQ）组合来防止发射机中的连续分组错误的方法，包括：将数据分组从发射机发射到接收机; 当从接收器接收到对应于数据分组的否定确认（NACK）分组时，检查NACK分组中存储的信息，其中所存储的信息表示数据分组是否存储在缓冲器中; 当数据分组存储在缓冲器中时，向接收机发送具有奇偶校验位的分组，并将数据分组存储在重传队列中; 并且当数据分组未存储在缓冲器中时，重新发送数据分组并维护存储在传输队列中的数据分组。

公开(公告)号：US20080253333A1

公开(公告)日：2008-10-16

申请号：US12066723

申请日：2006-07-24

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： H04Q7/00

CPC分类号： H04W28/20 ,  H04W28/26 ,  H04W36/22

摘要： Provided is a call admission control method for use in a packet based communication system, which can secure a handoff and a quality of service (QoS) by discriminating a new call and a handoff call and borrowing a shared bandwidth, a reserved bandwidth, and a bandwidth of other service according to kinds of services and their characteristics. The call admission control method includes the steps of: a) dividing frequency band into a reservation band and a shared band for communication service handoff call and multicast service handoff call, and determining whether a call admission request of users is a new call or a handoff call; b) when the call admission request is the new call, determining whether to accept the call admission request by allocating the shared band and a band borrowed from other service; and c) when the call admission request is the handoff call, determining whether to accept the call admission request by allocating the shared band, the reserved band, and the borrowed band according to services and bandwidth resources.

摘要翻译： 提供一种在基于分组的通信系统中使用的呼叫准入控制方法，其可以通过区分新的呼叫和切换呼叫并借用共享带宽，保留带宽和保留带宽来确保切换和服务质量（QoS） 其他服务的带宽根据服务种类及其特点。 呼叫准入控制方法包括以下步骤：a）将频带划分为用于通信业务切换呼叫和组播服务切换呼叫的预留频带和共享频带，以及确定用户的呼叫准入请求是新呼叫还是切换 呼叫; b）当呼叫许可请求是新呼叫时，通过分配共享频带和从其他服务借用的频段确定是否接受呼叫准入请求; 以及c）当呼叫许可请求是越区切换呼叫时，根据服务和带宽资源来分配共享频带，保留频带和借用频带来确定是否接受呼叫许可请求。

公开(公告)号：US20080279142A1

公开(公告)日：2008-11-13

申请号：US12096205

申请日：2006-11-09

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： H04Q7/20

CPC分类号： H04W52/42

摘要： Provided is a method for adaptive transmit power allocation in a multiuser OFDM system. The method includes: a) obtaining a channel gain for a predetermined bit period for each user at a predetermined time, and allocating all of available sub carriers to a user farthest separated among a plurality of users having a good channel gain; b) comparing a channel gain of the user allocated with the subcarrier at the step a) with an initial threshold value; c) allocating a transmit power uniformly to each of the sub carries allocated at the step a) using an Equal-power allocation algorithm if the channel gain is larger than the initial threshold value at the step b); and d) allocating a transmit power to each of the sub carriers allocated at the step a) using a water-filling power allocation algorithm if the channel gain is smaller than the initial threshold value at the step b).

摘要翻译： 提供了一种用于多用户OFDM系统中的自适应发射功率分配的方法。 该方法包括：a）在预定时间内为每个用户获得预定比特周期的信道增益，并将所有可用子载波分配给具有良好信道增益的多个用户中最远分离的用户; b）将步骤a）中分配有子载波的用户的信道增益与初始阈值进行比较; c）如果在步骤b）中信道增益大于初始阈值，则使用等功率分配算法，在步骤a）中分配的每个子载波均匀地分配发射功率; 以及d）如果在步骤b）中信道增益小于初始阈值，则使用灌水功率分配算法，在步骤a）中分配的每个子载波分配发送功率。

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：US09136936B2

公开(公告)日：2015-09-15

申请号：US13328261

申请日：2011-12-16

申请人： Hee-Wook Kim ,  Kun-Seok Kang ,  Bon-Jun Ku ,  Do-Seob Ahn

发明人： Hee-Wook Kim ,  Kun-Seok Kang ,  Bon-Jun Ku ,  Do-Seob Ahn

IPC分类号： H04W84/06 ,  H04B7/185 ,  H04L5/00 ,  H01Q25/00 ,  H04W72/04

CPC分类号： H04B7/18515 ,  H01Q25/00 ,  H04L5/0023 ,  H04L5/0037 ,  H04W72/0453 ,  H04W84/06

摘要： A transmission apparatus and method for implementing frequency selectivity in a multi-beam satellite system that transmits a signal to user equipment through one or more antenna feed groups. The transmission apparatus includes: an antenna feed group selecting unit configured to select one or more antenna feed groups from the one or more antenna feed groups; a cyclic delay offset determining unit configured to determine a cyclic delay offset according to a determination result of the antenna feed group selecting unit; and a transmitting unit configured to apply the cyclic delay offset determined by the cyclic delay offset determining unit to a signal to be transmitted through the one or more antenna feed groups selected by the antenna feed group selecting unit, and to transmit a resultant signal.

摘要翻译： 一种用于在通过一个或多个天线馈送组向用户设备发送信号的多波束卫星系统中实现频率选择性的传输装置和方法。 发送装置包括：天线馈送组选择单元，被配置为从所述一个或多个天线馈送组中选择一个或多个天线馈送组; 循环延迟偏移确定单元，被配置为根据天线馈送组选择单元的确定结果确定循环延迟偏移; 以及发送单元，被配置为将由循环延迟偏移确定单元确定的循环延迟偏移应用于通过天线馈送组选择单元选择的一个或多个天线馈送组发送的信号，并发送结果信号。

公开(公告)号：US20100022238A1

公开(公告)日：2010-01-28

申请号：US12442072

申请日：2006-12-11

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

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

IPC分类号： H04W84/06

CPC分类号： H04B7/0669 ,  H04B7/15514 ,  H04B7/18582

摘要： Provided is a satellite communication system for obtaining a diversity gain by transmitting a signal applied with STBC. When a signal transmission band of a link between a satellite and a terminal differs from that of a link between a satellite and a repeater, the satellite communication system includes: a satellite for transmitting a first signal encoded to STBC using a band of a link formed between the satellite to a terminal and transmitting a second signal encoded to STBC using a band of a link formed between the satellite to a repeater; and at least one of frequency transforming repeaters for receiving the second signal through the band of the link formed between the satellite to the repeater, transforming the received second signal to a signal with other frequency band, and transmitting the transformed second signal using a band of a link formed to a terminal.

摘要翻译： 提供了一种用于通过发送施加有STBC的信号来获得分集增益的卫星通信系统。 当卫星和终端之间的链路的信号传输频带与卫星和中继器之间的链路的信号传输频带不同时，卫星通信系统包括：用于使用形成的链路的频带发送编码到STBC的第一信号的卫星 在所述卫星到终端之间，并且使用在所述卫星与中继器之间形成的链路的频带来发送编码到STBC的第二信号; 以及频率变换中继器中的至少一个，用于通过在卫星与中继器之间形成的链路的频带接收第二信号，将接收到的第二信号变换为具有其他频带的信号，以及使用 与终端形成的链接。

公开(公告)号：US20120155378A1

公开(公告)日：2012-06-21

申请号：US13328261

申请日：2011-12-16

申请人： Hee-Wook KIM ,  Kun-Seok Kang ,  Bon-Jun Ku ,  Do-Seob Ahn

发明人： Hee-Wook KIM ,  Kun-Seok Kang ,  Bon-Jun Ku ,  Do-Seob Ahn

IPC分类号： H04W88/04 ,  H04W72/04

CPC分类号： H04B7/18515 ,  H01Q25/00 ,  H04L5/0023 ,  H04L5/0037 ,  H04W72/0453 ,  H04W84/06

摘要： A transmission apparatus and method for implementing frequency selectivity in a multi-beam satellite system that transmits a signal to user equipment through one or more antenna feed groups. The transmission apparatus includes: an antenna feed group selecting unit configured to select one or more antenna feed groups from the one or more antenna feed groups; a cyclic delay offset determining unit configured to determine a cyclic delay offset according to a determination result of the antenna feed group selecting unit; and a transmitting unit configured to apply the cyclic delay offset determined by the cyclic delay offset determining unit to a signal to be transmitted through the one or more antenna feed groups selected by the antenna feed group selecting unit, and to transmit a resultant signal.

摘要翻译： 一种用于在通过一个或多个天线馈送组向用户设备发送信号的多波束卫星系统中实现频率选择性的传输装置和方法。 发送装置包括：天线馈送组选择单元，被配置为从所述一个或多个天线馈送组中选择一个或多个天线馈送组; 循环延迟偏移确定单元，被配置为根据天线馈送组选择单元的确定结果确定循环延迟偏移; 以及发送单元，被配置为将由循环延迟偏移确定单元确定的循环延迟偏移应用于通过天线馈送组选择单元选择的一个或多个天线馈送组发送的信号，并发送结果信号。

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：US08543106B2

公开(公告)日：2013-09-24

申请号：US12442072

申请日：2006-12-11

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

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

IPC分类号： H04W92/00

CPC分类号： H04B7/0669 ,  H04B7/15514 ,  H04B7/18582

摘要： Provided is a satellite communication system for obtaining a diversity gain by transmitting a signal applied with STBC. When a signal transmission band of a link between a satellite and a terminal differs from that of a link between a satellite and a repeater, the satellite communication system includes: a satellite for transmitting a first signal encoded to STBC using a band of a link formed between the satellite to a terminal and transmitting a second signal encoded to STBC using a band of a link formed between the satellite to a repeater; and at least one of frequency transforming repeaters for receiving the second signal through the band of the link formed between the satellite to the repeater, transforming the received second signal to a signal with other frequency band, and transmitting the transformed second signal using a band of a link formed to a terminal.

摘要翻译： 提供了一种用于通过发送施加有STBC的信号来获得分集增益的卫星通信系统。 当卫星和终端之间的链路的信号传输频带与卫星和中继器之间的链路的信号传输频带不同时，卫星通信系统包括：用于使用形成的链路的频带发送编码到STBC的第一信号的卫星 在所述卫星到终端之间，并且使用在所述卫星与中继器之间形成的链路的频带来发送编码到STBC的第二信号; 以及频率变换中继器中的至少一个，用于通过在卫星与中继器之间形成的链路的频带接收第二信号，将接收到的第二信号变换为具有其他频带的信号，以及使用 与终端形成的链接。