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公开(公告)号：KR1020140051034A
公开(公告)日：2014-04-30
申请号：KR1020130013006
申请日：2013-02-05
Applicant: 주식회사 케이티 , 서울대학교산학협력단
IPC: H04W52/02
CPC classification number: Y02D70/00 , H04W28/06 , H04W52/0209
Abstract: A method for transmitting traffic indication map which is capable of reducing power consumption of a terminal by appropriately distributing a downlink traffic. The method includes: a step of generating a DTIM beacon having a segmentation information element; and a step of dividing TIM information of a TIM page which is subject to transmit into segments with variable sizes and transmitting the segments using the DTIM beacon and beacons within a DTIM period which corresponds to the DTIM beacon. Therefore, terminals which operate with a PS mode can reduce power consumption which is required to receive downlink frames stored in a buffer of an access point by appropriately distributing the downlink traffic stored in the buffer within a predetermined range. Also, one beacon frame can transmit only one TIM segment at a time, so that the size of the beacon frame can be controlled properly. [Reference numerals] (AA) Start; (BB) End; (S1710) Generating a DTIM becon which includes a segmentation information element; (S1721) Dividing the TIM information on a TIM page which is subject to be transmitted and transmitting the segments based on the number of blocks having buffered data included in a bitmap; (S1723) Dividing the TIM information on a TIM page which is subject to be transmitted and transmitting the segments using block traffic indication elements; (S1725) Dividing the TIM information on a TIM page which is subject to be transmitted and transmitting the segments using a second bitmap
Abstract translation: 一种用于发送业务指示图的方法，该方法能够通过适当地分配下行流量来降低终端的功耗。 该方法包括：生成具有分割信息元素的DTIM信标的步骤; 以及将要发送的TIM页面的TIM信息划分成具有可变大小的段的步骤，并且在对应于DTIM信标的DTIM周期内使用DTIM信标和信标发送段。 因此，以PS模式工作的终端可以通过将存储在缓冲器中的下行链路业务量适当地分配在预定范围内，来降低接收存储在接入点的缓冲器中的下行链路帧所需的功耗。 此外，一个信标帧一次只能传送一个TIM段，从而可以适当地控制信标帧的大小。 （附图标记）（AA）开始; （BB）结束; （S1710）生成包含分段信息元素的DTIM becon; （S1721）根据包含在位图中的具有缓冲数据的块的数量，将TIM信息划分在可能被发送的TIM页面上，并发送段; （S1723）在可能被发送的TIM页面上划分TIM信息，并使用块业务指示元素发送段; （S1725）在可能被发送的TIM页面上划分TIM信息，并使用第二位图传送段
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公开(公告)号：KR1020130117562A
公开(公告)日：2013-10-28
申请号：KR1020120040507
申请日：2012-04-18
Applicant: 주식회사 엘지유플러스 , 서울대학교산학협력단
Abstract: PURPOSE: A system for selecting a channel and a method thereof, an access point (AP) thereof, and a recording medium for the same are provided to provide step-by-step channel selection algorithm according to priority which has to be guaranteed when there are various applications. CONSTITUTION: An AP (210) sets priority about a plurality of channel selection references which is preestablished according to each communication service, by considering each communication service provided to a plurality of terminals. The AP selects each operation channel per the plurality of terminals by applying the plurality of channel selection references step by step according to the established priority. A user equipment (UE) (220) exchanges data with the AP by using the operation channel selected by the AP. [Reference numerals] (210) Access point (AP); (211,221) Control unit; (212,222) Memory; (213,223) RF unit; (220) User equipment
Abstract translation: 目的：提供一种用于选择信道的方法及其方法，其接入点（AP）及其记录介质，以便根据优先权提供逐步信道选择算法，该优先级必须在当 是各种应用。 构成：通过考虑提供给多个终端的每个通信服务，AP（210）根据每个通信服务设置预先建立的多个信道选择参考的优先级。 AP通过根据建立的优先级逐步应用多个信道选择基准来选择每个终端的每个操作信道。 用户设备（UE）（220）通过使用由AP选择的操作信道与AP交换数据。 （附图标记）（210）接入点（AP）; （211,221）控制单元; （212,222）记忆; （213,223）射频单元; （220）用户设备
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公开(公告)号：KR101184370B1
公开(公告)日：2012-09-20
申请号：KR1020100126225
申请日：2010-12-10
Applicant: 서울대학교산학협력단
IPC: H04B7/06
Abstract: 본 발명은 복수의 전송 스트림(stream)이 동시에 전송 가능한 MIMO 시스템에서 전송 모드 별로 특화된 SNR(Signal to Noise Ratio)을 특정하여 전송 레이트 조정을 위한 MCS(Modulation and Coding Scheme)을 조정함과 동시에, 최적의 처리율(throughput)을 가지는 전송 모드를 선택하도록 하는 방법 및 장치에 대한 것이다.
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公开(公告)号：KR1020120085454A
公开(公告)日：2012-08-01
申请号：KR1020110006783
申请日：2011-01-24
Applicant: 서울대학교산학협력단
CPC classification number: H04W16/12 , H04W16/32 , H04W72/0406 , H04W84/045
Abstract: PURPOSE: A frequency resource allocation method in a wireless communication system and apparatus therefor are provided to increase frequency usage efficiency according to a hybrid spectrum usage method. CONSTITUTION: A dedicated frequency band(D) is allocated to MUE(Macro base station User Equipment) which is located between dm1 and dm2 of MUEs which share frequency bands(S) according to a user pooling method. An FUE(Femto base station User Equipment) is unable to use the dedicated frequency band. The FUE is connected from a macro base station to a femto base station located between df1 and df2. The FUE uses the frequency bands except for a cell edge frequency band(f2) used by the MUE.
Abstract translation: 目的：提供无线通信系统中的频率资源分配方法及其装置，以根据混合频谱使用方法提高频率使用效率。 构成：根据用户汇集方式，将专用频带（D）分配给位于共享频带（S）的MUE的dm1和dm2之间的MUE（宏基站用户设备）。 FUE（Femto基站用户设备）无法使用专用频段。 FUE从宏基站连接到位于df1和df2之间的毫微微基站。 FUE使用除了MUE使用的小区边缘频带（f2）之外的频带。
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公开(公告)号：KR1020110087999A
公开(公告)日：2011-08-03
申请号：KR1020100007701
申请日：2010-01-28
Applicant: 서울대학교산학협력단
CPC classification number: H04W72/1252 , H04W72/1231
Abstract: PURPOSE: A semi persistent scheduling method and apparatus thereof are provided to reduce the number of unnecessary retransmissions in the use of semi persistent scheduling. CONSTITUTION: A first RB(Resource Block)(605) shows an RU(Resource Unit) by continuous scheduling. A second RB(650) shows the RU by dynamic scheduling. The second RB receives fixed resources from the starting point of a VoIP call to the ending point of a VoIP call.
Abstract translation: 目的：提供一种半永久调度方法及其装置，以减少使用半持续调度时不必要的重发次数。 构成：第一RB（资源块）（605）通过连续调度显示RU（资源单元）。 第二RB（650）通过动态调度显示RU。 第二个RB从VoIP呼叫的起始点接收到VoIP呼叫的终点的固定资源。
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Patent Agency Ranking
公开(公告)号：KR1020110067319A
公开(公告)日：2011-06-22
申请号：KR1020090123872
申请日：2009-12-14
Applicant: 서울대학교산학협력단
Abstract: PURPOSE: A handoff apparatus and method thereof which uses effective SNR(Signal to Noise Ratio) of a mobile communication system are provided to perform handoff in order to move a mobile terminal to the other base station through effective SNR. CONSTITUTION: An effective SNR measuring unit(320) measures the effective SNR of a base station. A controller(330) performs handoff of the measured effective SNR. One or more antennas(301a-301n) transmits a signal from the base station. A communication unit(310) is connected to the antenna. The communication unit performs wireless communication with the base station.
Abstract translation: 目的：提供一种使用移动通信系统的有效SNR（信噪比）的切换装置及其方法，以执行切换，以通过有效SNR将移动终端移动到另一基站。 构成：有效SNR测量单元（320）测量基站的有效SNR。 控制器（330）执行所测量的有效SNR的切换。 一个或多个天线（301a-301n）从基站发送信号。 通信单元（310）连接到天线。 通信单元与基站进行无线通信。
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公开(公告)号：KR102198386B1
公开(公告)日：2021-01-05
申请号：KR1020190018549
申请日：2019-02-18
Applicant: 서울대학교산학협력단
Abstract: 본발명은비면허대역에서신호탐지방법및 이러한방법을수행하는장치에관한것이다. 비면허대역에서비무선랜통신신호를처리하는 STA은통신신호를송신및/또는수신하는통신부와통신부와동작가능하게(operatively) 연결된프로세서를포함할수 있되, 프로세서는비면허대역상에서비무선랜통신신호를탐지하고, 비무선랜통신신호를처리하도록구현될수 있고, 비무선랜통신신호의처리는스펙트럴스캔절차, 신뢰도체크절차및 노이즈캔슬링절차를기반으로수행될수 있다.
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公开(公告)号：KR101821350B1
公开(公告)日：2018-01-25
申请号：KR1020110076013
申请日：2011-07-29
Applicant: 에스케이텔레콤 주식회사 , 서울대학교산학협력단
Abstract: 본발명에서는무선랜기반의멀티-셀멀티캐스트환경에서의비디오전송에있어서, 단말장치로멀티캐스트비디오패킷을전송하여주는각각의액세스포인트등의무선통신장치가단말장치와의무선채널정보를바탕으로멀티캐스트비디오패킷의전송을위한 FEC 인코딩비율을독립적으로설정하여멀티캐스트비디오패킷의전송효율을높이도록한다. 즉, 비디오멀티캐스트서비스를받는단말장치들이무선채널정보를 FEC 인코딩비율조정기능을구비하는액세스포인트등의무선통신장치로피드백하고, 무선채널정보를이용하여액세스포인트별독립적인 FEC 인코딩비율을사용하도록함으로써낮은 FEC 인코딩비율로인한무선자원의불필요한낭비를방지시킬수 있다. 또한, 동일채널에서동작하는액세스포인트들이서로겹치는전송영역을가지고있는경우액세스포인트들간비디오패킷의전송시기를서로다르게설정하여겹치는전송영역에위치한단말장치에서비디오패킷의충돌이발생하지않도록한다.
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