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公开(公告)号：KR100452639B1
公开(公告)日：2004-10-14
申请号：KR1020010064917
申请日：2001-10-20
Applicant: 한국전자통신연구원
IPC: H04B7/19
CPC classification number: H04B7/18539 , H04B7/216
Abstract: Provided is a method and apparatus for common packet channel access to transmit data packet from a mobile terminal to a satellite access network in a mobile satellite communication system. The method and apparatus of this invention reduces transmission delay time, enhances the probability of successful access, and controls the currently used common packet channel by using a common control channel broadcast by the satellite access network. The method includes the steps of: receiving an access preamble including an access signature code and a collision-detection preamble including a collision-detection signature code, which are transmitted together from a plurality of mobile terminals, and transmitting an acknowledgement to the access preamble and collision-detection preamble to mobile terminals through a preamble acknowledgement channel.
Abstract translation: 提供了一种用于在移动卫星通信系统中从移动终端向卫星接入网络发送数据分组的公共分组信道接入的方法和设备。 本发明的方法和装置减少了传输延迟时间，提高了成功接入的概率，并且通过使用卫星接入网广播的公共控制信道来控制当前使用的公共分组信道。 该方法包括以下步骤：接收包括从多个移动终端一起发送的包括冲突检测签名码的接入签名码和冲突检测前导码的接入前导码，并向接入前导码发送确认;以及 通过前导确认信道向移动终端发送冲突检测前导码。
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公开(公告)号：KR1020040047907A
公开(公告)日：2004-06-05
申请号：KR1020047005437
申请日：2002-10-21
Applicant: 한국전자통신연구원
IPC: H04B7/26
CPC classification number: H04B7/18543 , H04W52/08
Abstract: PURPOSE: A device for controlling a closed loop power in a satellite mobile communication system and a method therefor are provided to previously calculate a power error after a loop delay time by using a pilot channel for downlink power control and to generate a power control command based on the calculated power error. CONSTITUTION: A converter(110) converts a power control command received from a base station into a power control width. A loop delay compensator(120) outputs a final power control width including a channel change after a loop delay for the received power control width. A channel change measurer(130) receives power of a pilot channel, and measures a channel change. A tab coefficient generator(140) generates a tab coefficient of the loop delay compensator(120) by using the channel change of the power of the pilot channel and a frequency of power control.
Abstract translation: 目的：提供一种用于控制卫星移动通信系统中的闭环功率的装置及其方法，用于通过使用用于下行链路功率控制的导频信道来预先计算环路延迟时间之后的功率误差，并且基于 计算功率误差。 构成：A转换器（110）将从基站接收的功率控制命令转换为功率控制宽度。 环路延迟补偿器（120）在接收的功率控制宽度的环路延迟之后输出包括通道改变的最终功率控制宽度。 信道改变测量器（130）接收导频信道的功率，并测量信道改变。 标签系数生成器（140）通过使用导频信道的功率的信道变化和功率控制的频率来生成环路延迟补偿器（120）的制表系数。
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公开(公告)号：KR1020040043794A
公开(公告)日：2004-05-27
申请号：KR1020020072200
申请日：2002-11-20
Applicant: 한국전자통신연구원
IPC: H04B7/19
CPC classification number: H04B7/1858 , Y02D70/1244 , Y02D70/446
Abstract: PURPOSE: A method for transmitting an adaptive packet in a cellular phone mobile communication system by using a multi beam satellite is provided to select a sector/beam requesting a minimal power, and to select a wireless resource of a transmission frame, then to assign a minimal power requested to satisfy packet reception quality by using a transmission path gain estimated for each user, thereby minimizing interference in other packet transmissions. CONSTITUTION: A system updates an active beam set for each user(501), and updates transmission path gains for each user based on an RSSI of a reported pilot signal(502). The system sets priorities for packets included in headers of transmission queues of each service(503). The system decides whether packets are to be assigned(504). If so, the system assigns packets for a reserved assignment service by a reserved assignment system(506), and assigns packets for a sharing assignment service by a sharing assignment system(510). If the packet assignment is successful, the system removes packets corresponding to an assigned transmission(509). If the packets fail in the assignment by the sharing assignment system, the system does not attempt assigning the packets(512).
Abstract translation: 目的：提供一种通过使用多波束卫星在蜂窝电话移动通信系统中发送自适应分组的方法，以选择请求最小功率的扇区/波束，并选择传输帧的无线资源，然后分配 通过使用为每个用户估计的传输路径增益来请求满足分组接收质量的最小功率，从而最小化其他分组传输中的干扰。 构成：系统更新每个用户的有效波束组（501），并且基于所报告的导频信号的RSSI来更新每个用户的传输路径增益（502）。 系统为每个服务的发送队列的头部中包含的分组设置优先级（503）。 系统决定是否分配报文（504）。 如果是，则系统通过保留分配系统（506）分配保留分配服务的分组，并通过共享分配系统（510）分配用于共享分配服务的分组。 如果分组分配成功，则系统去除与分配的传输相对应的分组（509）。 如果分配分配系统分配的分组失败，则系统不尝试分配分组（512）。
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公开(公告)号：KR1020040005839A
公开(公告)日：2004-01-16
申请号：KR1020037005373
申请日：2001-10-17
Applicant: 한국전자통신연구원
IPC: H04B7/26
CPC classification number: H04W74/006 , H04B7/18558 , H04W74/0833 , H04W84/06
Abstract: PURPOSE: A method for connecting an optional access channel in a satellite mobile communication system and a method therefor are provided to easily synchronize a mobile station with a satellite system, and to distributively transmit preambles and message data, thereby reducing interferences between packet signals. CONSTITUTION: A mobile station selects an optional channel access service class(S801), and initializes a retransmission period counter to '0'(S803). If the counter exceeds a maximum retransmission period(S805), an access procedure fails(S807). If the counter does not exceed the maximum retransmission period, the mobile station updates a parameter related to an optional access channel(S809). The mobile station checks persistence(S811), and initializes a power increase retransmission period for transmitting preambles and message data to '0'(S815). If a power increase counter is smaller than a maximum power increase retransmission period(S817), the mobile station selects a signature(S823), and transmits the preambles and the message data(S825). If a detected value is '1'(S827), the mobile station completes an optional access channel process.
Abstract translation: 目的：提供一种用于连接卫星移动通信系统中的可选接入信道的方法及其方法，用于容易地使移动台与卫星系统同步，并且分布地发送前同步码和消息数据，从而减少分组信号之间的干扰。 构成：移动站选择可选择的信道接入业务类别（S801），将重发期间计数器初始化为'0'（S803）。 如果计数器超过最大重传周期（S805），则访问过程失败（S807）。 如果计数器不超过最大重传周期，则移动台更新与可选存取信道有关的参数（S809）。 移动站检查持续时间（S811），并且初始化用于将前导码和消息数据发送到“0”的功率增加重传周期（S815）。 如果功率增加计数器小于最大功率增加重传周期（S817），则移动站选择签名（S823），并发送前导码和消息数据（S825）。 如果检测到的值为“1”（S827），则移动台完成可选的接入信道处理。
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公开(公告)号：KR100334911B1
公开(公告)日：2002-05-04
申请号：KR1020000004111
申请日：2000-01-28
Applicant: 한국전자통신연구원
IPC: H04B17/00
Abstract: 본 발명은 현재의 수신 신호 대 잡음비의 기울기로부터 일정 시간 이후의 신호 대 잡음비를 예측하는 기법으로, 예측 오차를 감소시키기 위해 저역 통과 필터와 평균 예측 오차 보정기능을 사용한다. 또한, 음의 예측 오차에 의한 서비스 품질 저하를 감소시키기 위해 고정 및 가변 예측 여유 할당 기능을 사용한다.
본 발명은, 수신 신호 대 잡음비의 크기의 고속 변화를 제거하기 위한 저역 통과 필터링을 하는 제 1 단계; 필터링된 신호 대 잡음비의 변화량으로부터 일정 시점 이후의 신호 대 잡음비의 크기를 예측하는 제 2 단계; 예측 단계에서의 예측 오차를 감소시키기 위해 평균 예측 오차를 계산하고 보정하는 제 3 단계; 신호 대 잡음비의 고속 변화에 대한 대처 방안으로 예측 여유를 할당하는 제 4 단계를 포함한다. 이러한 본 발명은 적응형 전송 방식을 사용하는 통신시스템에서 채널 상태에 따라 적절한 전송 방식을 선택하기 위해, 일정 시간 이후의 채널 상태를 추정하는 데에 사용된다.-
Patent Agency Ranking
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公开(公告)号：KR1020170059911A
公开(公告)日：2017-05-31
申请号：KR1020160156705
申请日：2016-11-23
Applicant: 한국전자통신연구원
Abstract: 7개이하의심볼을포함하는 sTTI에포함된적어도하나의심볼에서상향링크데이터를전송하는단계, 그리고 sTTI에포함된심볼중 상향링크데이터가전송되지않는하나의심볼에서짝수번째부반송파또는홀수번째부반송파를통해서상향링크데이터를위한 DMRS를전송하는단계를통해상향링크신호를전송하는방법및 장치가제공된다.
Abstract translation: 至少一个码元传送上行链路数据的步骤，和在包含于sTTI的符号的一个符号UL数据偶数子载波或奇数子载波不被传输包括在sTTI包括少于七个的符号， 并且通过DMRS传输上行链路数据用于上行链路数据。
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公开(公告)号：KR101740937B1
公开(公告)日：2017-05-30
申请号：KR1020110135080
申请日：2011-12-15
Applicant: 한국전자통신연구원
CPC classification number: H04W56/0055 , H04L27/2665 , H04L27/2678 , H04L27/2688 , H04L27/2691 , H04W84/18
Abstract: 애드혹 네트워크시스템에서분산동기를수행하는방법이제공된다. 이방법은수신시점변경구간을포함하는신호를복수의노드를통해수신하는단계및 상기복수의노드를통해상기신호를수신하는수신시점을미리설정된순환전치(cyclic prefix :CP) 구간에포함되도록상기수신시점변경구간내에서변경하는단계, 데이터를복구하기시작하는시점인고속푸리에변환(Fast Fourier Transform : FFT) 시작시점을상기변경된수신시점을기초로변경하는단계및 미리설정된 FFT 시작시점의기준점및 상기변경된 FFT 시작시점의차이값을기초로상기복수의노드각각의전송시점의기준점을변경하는단계를포함한다. 이방법에따르면, 노드간거리에따른전파지연보다긴 순환전치부호를삽입하는동기방법보다적은오버헤드를가진다.
Abstract translation: 提供了一种用于在自组织网络系统中执行分布式同步的方法。 列入：（CP循环前缀）间隔该方法是包括一个接收点变化的时间间隔通过多个节点接收的信号，并接收预定的循环前缀添加到时通过所述多个节点中接收所述信号的 用于从在时间变化间隔接收点改变的步骤，快速傅立叶的时间变换，开始恢复数据：改变开始的步骤的参考点（快速傅里叶变换FFT）开始的接收时刻为基准点被改变时，与预先设定的FFT起始时间和 基于修改的FFT起始时间和改变的所述多个节点中的相应的传输时间的基准点的步骤之间的差值。 根据该方法，并且具有比插入比根据节点之间的距离的传播延迟长周期前缀的同步方法更少的开销。
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