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Patent Agency Ranking
公开(公告)号：KR1020150081409A
公开(公告)日：2015-07-14
申请号：KR1020140191925
申请日：2014-12-29
Applicant: 서울대학교산학협력단
CPC classification number: H04B7/0452 , H04B7/0408 , H04B7/0456 , H04B7/0613
Abstract: 본발명은대규모다중안테나를사용하는다중사용자무선통신시스템에서다중신호를동시에전송하는방법에관한것이다. 대규모안테나를사용하여다중사용자의신호를동시에전송하는기존의 ZFBF(Zeroforcing Beamforming)과같은다중신호전송기법은매우큰 연산복잡도를필요로하여실장이용이하지못하다. 본발명은다중사용자빔간의간섭을순차적으로제거함으로써기존의 ZFBF보다성능열화는크지않으면서대규모안테나를사용하는다중신호전송기법의실장복잡도를크게줄일수 있다.
Abstract translation: 本发明涉及一种在使用大规模多天线的多用户无线通信系统中同时发送多个信号的方法。 通过使用大型天线，同时发送多个用户的信号的诸如先前的零向波束形成（ZFBF）的多信号传输方法需要高度复杂的计算，因此不能以简单的方式实现。 本发明的方法可以显着降低实施使用大规模天线的多信号传输方法的复杂性，同时方法的性能的劣化比现有方法的性能降低，因为顺序地消除了多个用户的波束之间的干扰。
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公开(公告)号：KR1020140093554A
公开(公告)日：2014-07-28
申请号：KR1020130006129
申请日：2013-01-18
Applicant: 주식회사 케이티 , 서울대학교산학협력단
IPC: H04L12/803 , H04B7/04
CPC classification number: H04L5/0035 , H04B7/024 , H04W16/08 , H04W72/0486
Abstract: In a communication environment of a distributed antenna structure controlling one or more radio units (RU) by one digital unit (DU), for distributing and processing a transmission load to transmit a signal for providing service to a terminal in the adjacent RU, a load balancing control system determines a balancing load to multiple RU in contact with the terminal if a load is generated in a first RU. calculates the capacity to distribute the load, allocates resources for a second RU to prevent the resources of the first 1 RU to be used for services provided to the terminal from being overlapped with a time axis position after determining the second RU to distribute the load of the adjacent RU; and controls to transmit the resources by using the resources allocated to the terminal via the first RU and the second RU.
Abstract translation: 在通过一个数字单元（DU）控制一个或多个无线电单元（RU）的分布式天线结构的通信环境中，为了分发和处理传输负载以向相邻RU中的终端发送用于提供服务的信号，负载 如果在第一RU中产生负载，则平衡控制系统确定与终端接触的多个RU的平衡负载。 计算分配负载的能力，分配用于第二RU的资源，以防止在确定第二RU以分配负载之后，提供给终端的服务与时间轴位置重叠的第一RU的资源被用于 相邻的RU; 并且控制通过使用经由第一RU和第二RU分配给终端的资源来发送资源。
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公开(公告)号：KR1020130142274A
公开(公告)日：2013-12-30
申请号：KR1020120065344
申请日：2012-06-19
Applicant: 삼성전자주식회사 , 서울대학교산학협력단
CPC classification number: H04W36/04
Abstract: The present invention relates to a method for improving transmission performance by enabling a user, who is located in a femto-cell boundary in a macro-cell base station, to select a base station for receiving a service by recognizing the environment of oneself and considering the operation information of nearby base stations in a heterogeneous-cell operation environment where femto-cells are operated in the operation area of a macro-cell base station. A method for a terminal to select a serving base station according to the present invention includes the following steps: a step of receiving operation information, which contains at least one among the number of multi-antennas, used frequency bands, and load status for at least one small base station, from a macro-cell base station; and a step of transmitting a message, which requests a handover to a base station having maximum average transmission capacity by using the operation information, to the macro-cell base station. According to the present invention, a user located on a heterogeneous-cell boundary can request neighboring cell operation information, which includes the number of antennas, frequency resource utilization information, and cell loads, from a serving macro-cell base station, and the serving macro-cell base station can obtain operation information of a corresponding neighboring cell through a backhaul network and provide the operation information for the user. As a result, the user can estimate the average transmission capacity of the serving macro-cell base station and neighboring cell based on the received operation information, and select a base station capable of providing a service with highest quality, therefore, the performance of the user located on the heterogeneous-cell boundary can be improved. [Reference numerals] (410) Service;(420) Preamble signal;(425) Detect neighboring cell ID;(430) Request neighboring cell operation information;(440) Exchange information (wired backhaul network);(450) Neighboring cell information;(455) Calculate transmission capacity;(460) Select target cell;(470) Request handover;(AA) Femto-cell
Abstract translation: 本发明涉及通过使位于宏小区基站中的毫微微小区边界的用户能够通过识别自身的环境来选择用于接收服务的基站来考虑自身的环境来提高传输性能的方法，并且考虑 在宏小区基站的操作区域中操作毫微微小区的异构小区操作环境中的附近基站的操作信息。 根据本发明的终端选择服务基站的方法包括以下步骤：接收包含多个天线数量，使用频带中的至少一个的操作信息的步骤和用于在 至少一个小型基站，来自宏小区基站; 以及通过使用所述操作信息向具有最大平均传输容量的基站请求切换的消息的步骤。 根据本发明，位于异构小区边界上的用户可以从服务宏小区基站请求包括天线数量，频率资源利用信息和小区负载的相邻小区操作信息， 宏小区基站可以通过回程网络获取对应的相邻小区的操作信息，并为用户提供操作信息。 结果，用户可以基于接收到的操作信息来估计服务宏小区基站和相邻小区的平均传输容量，并且选择能够提供最高质量的业务的基站，因此， 可以改善位于异质单元边界上的用户。 （410）服务;（420）前导信号;（425）检测相邻小区ID;（430）请求邻近小区操作信息;（440）交换信息（有线回程网络）;（450）邻居小区信息; （455）计算传输容量;（460）选择目标小区;（470）请求切换;（AA）毫微微小区
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公开(公告)号：KR1020130141941A
公开(公告)日：2013-12-27
申请号：KR1020120065086
申请日：2012-06-18
Applicant: 삼성전자주식회사 , 서울대학교산학협력단
CPC classification number: H04L25/03904 , H04B7/024 , H04L25/0224 , H04W48/20
Abstract: The present invention relates to a method for transmitting a signal by selecting a cell which a base station and a user cooperatively receive a service in an CoMP environment which multi cells service a user by cooperating with each other. The present invention improves a frequency efficiency in case of multi-cell cooperative transmission by selecting a cell which receives a service among service candidate cells according to a channel status of a user by considering a channel quantization error, reduces the channel information feedback amount for multi-cell cooperative transmission and decreases the multi-user scheduling complexity. [Reference numerals] (605) Pilot signal transmission;(607) Channel estimation and quantization error calculation;(609) Channel information feedback base station selection;(611) Base station index and channel direction information feedback;(613) User to service selection and beam weighting factor generation;(615) Data transmission;(AA) Base station 1;(BB) Base station 2;(CC) Base station N;(DD) User U_1;(EE) User U_k;(FF) User U_m
Abstract translation: 本发明涉及一种通过选择基站和用户在多小区通过协作进行多小区服务的CoMP环境中协同接收业务的小区来发送信号的方法。 本发明通过考虑信道量化误差，根据用户的信道状态选择在业务候选小区中接收业务的小区来提高频率效率，减少多个小区的信道反馈量 - 小区协同传输，降低多用户调度复杂度。 （605）导频信号传输;（607）信道估计和量化误差计算;（609）信道信息反馈基站选择;（611）基站索引和信道方向信息反馈;（613）用户服务选择 （615）数据传输;（AA）基站1;（BB）基站2;（CC）基站N;（DD）用户U_1;（EE）用户U_k;（FF）用户U_m
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公开(公告)号：KR1020130070847A
公开(公告)日：2013-06-28
申请号：KR1020110138069
申请日：2011-12-20
Applicant: 삼성전자주식회사 , 서울대학교산학협력단
CPC classification number: H04B7/0617 , H04B7/0619 , H04B7/0689 , H04L25/0224 , H04W72/04 , H04W72/121
Abstract: PURPOSE: A signal transmitter and a method thereof are provided to transmit a signal to a user selected by considering channel characteristics in an environment including a multi-antenna system. CONSTITUTION: A feedback determination unit(309) determines the transmission state of channel information by comparing the determined threshold value with the measured channel state value. A transmitter transmits channel information to a base station by using the allocated uplink resources according to the transmission state of the channel information. A threshold value determination unit(305) determines a threshold value according to the variation information. The threshold value determination unit provides the determined threshold value to the feedback determination unit. [Reference numerals] (301) Reception unit; (303) Channel estimation unit; (305) Threshold value determination unit; (309) Feedback determination unit; (311) Resource allocation request unit; (AA) Increase and decrease information; (BB) Normalization unit; (CC) User K
Abstract translation: 目的：提供一种信号发射机及其方法，用于通过在包括多天线系统的环境中考虑信道特性来向用户发送信号。 构成：反馈确定单元（309）通过将确定的阈值与所测量的信道状态值进行比较来确定信道信息的传输状态。 发射机根据所述信道信息的发送状态通过使用所分配的上行链路资源向基站发送信道信息。 阈值确定单元（305）根据变化信息确定阈值。 阈值确定单元将确定的阈值提供给反馈确定单元。 （附图标记）（301）接收单元; （303）信道估计单元; （305）阈值确定单元; （309）反馈确定单元; （311）资源分配请求单元; （AA）增加和减少信息; （BB）归一化单位; （CC）用户K
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