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公开(公告)号：KR1020010018215A
公开(公告)日：2001-03-05
申请号：KR1019990034078
申请日：1999-08-18
Applicant: 한국전자통신연구원
IPC: G11B20/10
Abstract: PURPOSE: An allocating method of dynamic buffers is provided to increase reusing rate of buffer blocks and to reduce access frequency of a lower disk device by saving/managing approach tendency of a user and deciding the size of buffer blocks therewith. CONSTITUTION: A dynamic buffer allocator registers CRD(current user request distribution information, 203) and BCT(buffer control information,204) if the two are not registered when a user requests a video. Video access data of the user are added to the CRD in real time. The dynamic buffer allocator calculates the current access probability of user with access frequency, saves or corrects the buffer size data of registered video on the BCT. Difference of video data block size influences reusing rate probability of used data blocks. If the video data block is large, a single data block saved in a main memory buffer area(101) is reused. PRD(past user request distribution information,202) is used as initial data when the system is started. The current video server state is applied exactly to buffer management information as the CRD is added continuously. The dynamic buffer allocator always keeps the access data of users and predicts the access tendency of users to decide the buffer block size allocated to each video. A buffer manager responds to data block request of users and reads data of a lower disk device if the request data block is not on a specific buffer area.
Abstract translation: 目的：提供动态缓冲区的分配方法，以增加缓冲区块的重用率，并通过保存/管理用户的访问趋势并确定缓冲区块的大小来降低下磁盘设备的访问频率。 构成：当用户请求视频时，如果两者未被注册，则动态缓冲区分配器注册CRD（当前用户请求分配信息203）和BCT（缓冲器控制信息，204）。 将用户的视频访问数据实时添加到CRD。 动态缓冲区分配器计算具有访问频率的用户的当前访问概率，保存或更正BCT上注册视频的缓冲区大小数据。 视频数据块大小的差异影响使用数据块的重用速率概率。 如果视频数据块大，则存储在主存储器缓冲区（101）中的单个数据块被重新使用。 当系统启动时，PRD（过去的用户请求发布信息，202）被用作初始数据。 当连续添加CRD时，当前的视频服务器状态恰好适用于缓冲管理信息。 动态缓冲区分配器始终保持用户的访问数据，并预测用户决定分配给每个视频的缓冲区块大小的访问趋势。 如果请求数据块不在特定缓冲区上，缓冲管理器响应用户的数据块请求并读取下磁盘设备的数据。
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公开(公告)号：KR1020000038076A
公开(公告)日：2000-07-05
申请号：KR1019980052938
申请日：1998-12-03
Applicant: 한국전자통신연구원
IPC: G06F12/00
Abstract: PURPOSE: A method for zero-copy message passing is disclosed to eliminate memory duplication overhead caused by message-passing and to minimize the decline in performance by sharing a memory, which is used for passing process, demo and network card message passing, in a network environment. CONSTITUTION: A method for zero-copy message passing is composed of transmission, reception, and direction. When sending message to a remote host, message is copied from processor(201)'s local area to an area where memory(203)'s DMA is possible. A network card(204) transmits data to network, therefore eliminating overhead through zero-copy. A memory area(203) for all processes of message passing and network card receives designated area allocated by boot time. The memory area receives the physical address of start point and size that are returned by operation system and informs the general processor of the information. Each process finds the area where common memory can enter within its imaginary memory, maps the physical memory area and imaginary memory area using a map. Therefore, when writing in its imaginary memory space, it's actually writing in common memory.
Abstract translation: 目的：公开了一种零复制消息传递方法，以消除由消息传递引起的内存复制开销，并通过共享用于通过过程，演示和网卡消息传递的内存来最小化性能下降， 网络环境。 构成：零拷贝消息传递的方法由传输，接收和方向组成。 当向远程主机发送消息时，将消息从处理器（201）的本地区域复制到存储器（203）的DMA可能的区域。 网卡（204）向网络发送数据，从而通过零拷贝消除开销。 用于消息传递和网卡的所有处理的存储区域（203）接收由引导时间分配的指定区域。 存储区域接收操作系统返回的起始点和大小的物理地址，并向通用处理器通知该信息。 每个进程找到公共内存可以在其虚拟内存中进入的区域，使用地图映射物理内存区域和虚拟内存区域。 因此，当写入其虚拟的存储空间时，它实际上是在共同的内存中写入。
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公开(公告)号：KR1020210062617A
公开(公告)日：2021-05-31
申请号：KR1020210066161
申请日：2021-05-24
Applicant: 한국전자통신연구원
Abstract: 밀리미터파대역에서지향성안테나를사용하여광대역근거리무선통신을수행하는장치및 방법에관한것으로서, 일실시예에따른광대역근거리무선통신방법은소스노드로부터목적노드로의패킷전송시간을고려하여, 협력데이터프레임전송(a cooperated data frame transfer)을위한제1 시간간격(time interval) 및제2 시간간격을결정하고, 상기제1 시간간격의시작시점에서릴레이노드로지향된(directed) 안테나패턴을통하여상기릴레이노드에프레임을전송하며, 상기제2 시간간격의시작시점으로부터일정시간경과후에, 상기목적노드로지향된안테나패턴을통하여상기프레임을상기목적노드로전송한다.
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公开(公告)号：KR102243399B1
公开(公告)日：2021-04-22
申请号：KR1020190107569
申请日：2019-08-30
Applicant: 한국전자통신연구원
Abstract: 본발명은무선근거리통신망시스템에서릴레이를송수신에이용하는무선통신방법을제안한다. 본발명의실시예에따른무선근거리통신망시스템은릴레이를통한릴레이링크를설정하고설정한릴레이의동작모드가협력모드인경우장치간의전파지연등을파악해서소스장치에서데이터프레임을전송하는전송시점을설정해서무선통신하는방법에관한것이다.
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Patent Agency Ranking
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公开(公告)号：KR101916242B1
公开(公告)日：2018-11-07
申请号：KR1020170180769
申请日：2017-12-27
Applicant: 한국전자통신연구원
Abstract: 동일한시간구간에복수의단말들에게전송기회를부여하는스케줄링방법및 이를위한장치가제공된다. 이와같은스케줄링방법은제어국이송수신단말및 전송시간구간을지정하는제1 스케줄링정보를망 내의단말들에전송하는단계와, 망내의단말들로부터단말간 간섭정보를포함하는채널측정정보를수신하는단계및 상기채널측정정보를이용하여서로간섭이없는복수의송수신단말과전송시간구간을지정하는제2 스케줄링정보를생성하는단계를포함한다.
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公开(公告)号：KR101839597B1
公开(公告)日：2018-04-27
申请号：KR1020170104976
申请日：2017-08-18
Applicant: 한국전자통신연구원
CPC classification number: H04W56/005 , H04B7/15592 , H04W56/00 , H04W56/001 , H04W56/002 , H04W56/0045
Abstract: 데이터전송시점또는주파수오프셋을보정하여동기를제어하는방법및 스테이션에관한기술이개시된다. 이러한기술에따르면, 협력통신시스템에서데이터송수신을위한제1단말의동기제어방법에있어서, 제1 및제2응답프레임각각에대한전송시점정보를포함하는제1 및제2요청프레임각각을제2단말및 제3단말로전송하는단계; 상기제2단말및 상기제3단말로부터상기제1 및제2응답프레임을수신하는단계; 상기제1 및제2응답프레임의수신시간을이용하여, 상기제1단말과상기제2단말사이의제1전파지연시간및 상기제1단말과상기제3단말사이의제2전파지연시간을추정하는단계; 및상기제1전파지연시간과상기제2전파지연시간의지연시간차이정보를포함하는제3요청프레임을상기제2단말로전송하는단계를포함하는동기제어방법이제공된다.
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公开(公告)号：KR101764888B1
公开(公告)日：2017-08-16
申请号：KR1020110013201
申请日：2011-02-15
Applicant: 한국전자통신연구원
CPC classification number: H04B7/15592 , H04B7/155 , H04W24/08 , H04W72/085 , H04W72/1205 , H04W74/04 , H04W84/047
Abstract: 밀리미터파대역에서지향성안테나를사용하여광대역근거리무선통신을수행하는장치및 방법에관한것으로서, 일실시예에따른광대역근거리무선통신방법은소스노드로부터목적노드로의패킷전송시간을고려하여, 협력데이터프레임전송(a cooperated data frame transfer)을위한제1 시간간격(time interval) 및제2 시간간격을결정하고, 상기제1 시간간격의시작시점에서릴레이노드로지향된(directed) 안테나패턴을통하여상기릴레이노드에프레임을전송하며, 상기제2 시간간격의시작시점으로부터일정시간경과후에, 상기목적노드로지향된안테나패턴을통하여상기프레임을상기목적노드로전송한다.
Abstract translation: 和作为使用定向天线的毫米波波段中，以用于从所述源节点，协作数据执行根据实施例的宽带的短距离无线通信，宽带，短距离无线通信方法被认为是包传送的时间到目的地节点的装置和方法 帧发送（协作数据帧传输）用于在第一时间间隔（时间间隔）mitje 2小时，以确定的距离，其中，通过针对所述第一时间间隔为中继节点的开始的（定向）天线图案的所述中继， 并且在从第二时间间隔的开始时间开始经过预定时间之后，通过指向目的地节点的天线方向图将该帧发送到目的地节点。
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