公开(公告)号：KR1020140008237A

公开(公告)日：2014-01-21

申请号：KR1020130049304

申请日：2013-05-02

Applicant: 연세대학교 원주산학협력단 ,  한국전자통신연구원

Inventor： 김창기 ,  유정주 ,  홍진우 ,  서광덕

IPC: H04N21/236 ,  H04N21/434

CPC classification number: H04L69/22 ,  H04L67/02 ,  H04L67/14 ,  H04L69/28 ,  H04L69/327 ,  H04N21/2381 ,  H04N21/242 ,  H04N21/64322 ,  H04N21/6437 ,  H04N21/8547

Abstract: The present invention relates to an apparatus for transmitting packets in an MPEG media transport (MMT) system comprising: an MMT packetizing unit which generates MMT packets by recording standard time information related to a media access unit (AU) for providing synchronization of the media AU; and a transmission unit which transmits the generated MMT packets to a recipient side. Accordingly, a synchronization between different media can be provided in a hybrid transmission environment where media streams belonging to one program are transmitted from different servers. [Reference numerals] (AA) Start; (BB) End; (S510) AU input; (S520) Generate MPU by encapsulating the AU; (S530) Generate PTS relative to a first AU among the MPUs; (S540) Generate UTC information corresponding to the PTS? (UTC_resolution=?); (S550) Include UTC resolution information and generate UTC time information corresponding to the PTS(One among the UTC_resolution, UTC_32, UTC_48, and UTC_64); (S555) Generate the UTC resolution information(UTC_resolution); (S560) Store the generated UTC time information in an MPU header or MMT-CI; (S570) Generate an MMT asset

Abstract translation: 本发明涉及一种用于在MPEG媒体传输（MMT）系统中发送分组的装置，包括：MMT分组单元，其通过记录与媒体接入单元（AU）相关的标准时间信息来产生MMT分组，用于提供媒体AU的同步 ; 以及发送单元，其将生成的MMT分组发送到接收方。 因此，可以在混合传输环境中提供不同媒体之间的同步，其中属于一个节目的媒体流从不同的服务器发送。 （附图标记）（AA）开始; （BB）结束; （S510）AU输入; （S520）通过封装AU生成MPU; （S530）生成相对于MPU中的第一AU的PTS; （S540）生成对应于PTS的UTC信息？ （UTC_resolution =？）; （S550）包括UTC分辨率信息并生成对应于PTS的UTC时间信息（UTC_resolution，UTC_32，UTC_48和UTC_64之一）; （S555）生成UTC分辨率信息（UTC_resolution）; （S560）将生成的UTC时间信息存储在MPU头或MMT-CI中; （S570）生成MMT资产

公开(公告)号：KR101315853B1

公开(公告)日：2013-10-08

申请号：KR1020090128316

申请日：2009-12-21

Applicant: 한국전자통신연구원

Inventor： 김창기

IPC: H04W36/08

CPC classification number: H04W36/02 ,  H04W36/0072

Abstract: 본 발명은 이동통신 시스템에서 기지국 간 핸드오버 처리 방법에 관한 것이다. 본 발명에 의한 이동통신 시스템의 핸드오버 절차 처리 방법은 타겟 기지국으로부터 무선자원 재설정 및 패킷 포워딩을 위한 무선 액세스 베러어(Radio Access Bearer) 정보가 포함된 메시지를 수신하는 단계와 무선 액세스 베어러 메시지에 포함된 UL패킷 포워딩 지시자 정보를 검색하는 단계와 UL 패킷 포워딩 지시자 정보를 나타내는 비트가 '1'로 설정되어 있는 경우, 소스 기지국은 UL 패킷 및 DL 패킷을 포워딩하는 단계를 포함한다.
본 발명에 따르면, 핸드 오버 준비 단계에서 핸드오버 요구 응답 메시지에 포함된 UL 패킷 포워딩 지시자에 따라 UL 패킷을 포워딩함으로써 수신측 중심의 보다 바람직한 핸드오버가 가능하고, UL 패킷 포워딩시에는 UL 패킷의 비트맵 정보를 전송함에 있어서 비트맵의 가변성에 맞게 사이즈 정보와 함께 최적화된 비트맵을 전송함으로써 기지국간 핸드오버의 불필요한 제어신호의 사이즈를 줄일 수 있고, 타겟 기지국에서의 비트맵 처리 시간을 줄일 수 있어서, 보다 더 효율적인 핸드오버를 수행할 수 있는 효과가 있다.
핸드오버, 기지국, LTE, eNB, PDCP, X2-AP, 패킷 포워딩

公开(公告)号：KR1020130067659A

公开(公告)日：2013-06-25

申请号：KR1020110134449

申请日：2011-12-14

Applicant: 한국전자통신연구원 ,  선문대학교 산학협력단

Inventor： 김태정 ,  김창기 ,  유정주 ,  정영호 ,  홍진우 ,  정현기 ,  김병규

IPC: H04N19/30 ,  H04N19/103 ,  H04N19/567 ,  H04N19/176

CPC classification number: H04N19/30 ,  H04N19/103 ,  H04N19/176 ,  H04N19/567

Abstract: PURPOSE: A directional information based fast mode decision method in scalable video coding is provided to perform real time processing a process of scalable video coding by speeding up an encoding process. CONSTITUTION: A video encoder applies a decision block according to a motion encoding result with respect to a lower layer of an inputted video frame to motion encoding of a higher layer. The video encoder decides a prediction candidate block mode of the higher layer using directional information according to the motion encoding of the higher layer and applies direction information in the neighboring blocks to a current block(440). The video encoder decides candidate block modes of the current block which uses the directional information of the neighboring blocks, calculates RDC(Rate Distortion Cost) with respect to the decided candidate blocks and decides the final encoding block mode(450,460). [Reference numerals] (450) Calculating candidate modes; (460) Setting an optimized mode; (AA) Start; (BB) Optimized mode of lower layer is SKIP or 16X16?; (CC) Optimized mode of lower layer is SKIP or 16X8?; (DD) Optimized mode of lower layer is SKIP or 8X16?; (EE) Optimized mode of lower layer is SKIP or 8X8?; (FF,GG,HH,II,SS,TT) Yes; (JJ) Adding SKIP and 16X16 on every candidate mode; (KK) Adding SKIP and 16X8 on every candidate mode; (LL) Adding SKIP and 8X16 on every candidate mode; (MM) Adding SKIP and 8X8 on every candidate mode; (NN) End; (OO) The direction of the optimized mode of lower layer is the front?; (PP) The direction of the optimized mode of lower layer is the rear?; (QQ) No; (RR) Adding the optimized mode of adjacent blocks on every candidate mode; (UU) Adding the optimized mode of adjacent blocks on candidate modes in front; (VV) Adding the optimized mode of adjacent blocks on candidate modes in rear

Abstract translation: 目的：提供可伸缩视频编码中的基于方向信息的快速模式决策方法，通过加快编码过程来执行可伸缩视频编码过程的实时处理。 构成：视频编码器根据关于输入视频帧的较低层的运动编码结果将决策块应用于较高层的运动编码。 视频编码器使用根据较高层的运动编码的方向信息来决定较高层的预测候选块模式，并将相邻块中的方向信息应用于当前块（440）。 视频编码器确定使用相邻块的方向信息的当前块的候选块模式，针对所确定的候选块计算RDC（速率失真成本），并确定最终编码块模式（450,460）。 （附图标记）（450）计算候选模式; （460）设置优化模式; （AA）开始; （BB）下层优化模式为SKIP或16X16？ （CC）下层优化模式为SKIP或16X8？ （DD）下层优化模式为SKIP或8X16？ （EE）下层优化模式为SKIP或8X8？ （FF，GG，HH，II，SS，TT）是; （JJ）在每个候选模式下添加SKIP和16X16; （KK）在每个候选模式下添加SKIP和16X8; （LL）在每个候选模式下添加SKIP和8X16; （MM）在每个候选模式下添加SKIP和8X8; （NN）结束; （OO）下层优化方式的方向是前面？ （PP）下层优化方式的方向是后方; （QQ）否 （RR）在每个候选模式下添加相邻块的优化模式; （UU）在前面的候选模式中添加相邻块的优化模式; （VV）在后面的候选模式中添加相邻块的优化模式

公开(公告)号：KR101268818B1

公开(公告)日：2013-05-28

申请号：KR1020090091662

申请日：2009-09-28

Applicant: 한국전자통신연구원

Inventor： 나지현 ,  문정모 ,  조재형 ,  이상호 ,  김재흥 ,  박순기 ,  김창기 ,  신연승

IPC: H04W74/04

CPC classification number: H04N21/41407 ,  H04N21/4345 ,  H04N21/4384

Abstract: 채널재핑을줄이기위한무선액세스스케줄링방법및 장치가개시된다. 채널재핑을줄이기위한무선액세스스케줄링방법은, 현재수신중인모든채널에대한요약정보를채널스케줄링주기마다수신하고, 채널변경시, 상기요약정보를우선적으로제공하여채널재핑지연시간을줄이기위한방법을제공한다.

公开(公告)号：KR1020120070442A

公开(公告)日：2012-06-29

申请号：KR1020100132000

申请日：2010-12-21

Applicant: 한국전자통신연구원

Inventor： 김창기 ,  신재승

IPC: H04W76/02

CPC classification number: H04W4/70 ,  H04W76/10

Abstract: PURPOSE: A data transmitting method based on machine type group-based tunneling and a mobile communication system using the same are provided to reduce the loads of a system by efficiently implementing signaling processes. CONSTITUTION: A machine type communication(MTC) device in a MTC group transmits a connection request to a network. A mobile managing unit(220) transmits a session generation requesting message including MTC group identification(ID) and transmits an initial context setting requesting message including the MTC group ID to a base station. If the connection request form the MTC device is an initial connection request form the MTC group, the mobile managing unit transmits a bearer modification requesting message to a gateway.

Abstract translation: 目的：提供基于机器类型组的隧道技术的数据传输方法和使用其的移动通信系统，以通过有效地实现信令过程来减少系统的负载。 构成：MTC组中的机器类型通信（MTC）设备向网络发送连接请求。 移动管理单元（220）发送包括MTC组标识（ID）的会话生成请求消息，并向基站发送包括MTC组ID的初始上下文设置请求消息。 如果来自MTC设备的连接请求是来自MTC组的初始连接请求，则移动管理单元向网关发送承载修改请求消息。

公开(公告)号：KR1020090055668A

公开(公告)日：2009-06-03

申请号：KR1020070122411

申请日：2007-11-29

Applicant: 한국전자통신연구원 ,  삼성전자주식회사

Inventor： 김창기 ,  박용직

IPC: H04B7/26

CPC classification number: H04W36/0011 ,  H04W8/26 ,  H04W36/02 ,  H04W40/36 ,  H04W88/16 ,  H04W8/02

Abstract: A mobile communication system and a method for tunnel management is provided to improve the efficiency and performance of a system by managing an allocated tunnel with a terminal ID during service connection or handoff. An attach request is transmitted to an ENB(Evolved Node B)(111) at a region where a UE(User Equipment)(100) is placed(S310). The ENB transmits the attach request to an MME(Mobility Management Entity)(121)(S320). The MME allocates a terminal ID to the UE(S330), and requests a tunnel setup to an sGW(serving Gateway)(122) for bearer setup(S340). A tunnel management table is generated(S350), and the sGW transmits a response message depending on the tunnel setup to the MME(S360). The MME transmits a response message of attach accept(S370). The ENB transmits an attach complete message to the MME(S380).

Abstract translation: 提供移动通信系统和隧道管理方法，以通过在服务连接或切换期间管理具有终端ID的分配的隧道来提高系统的效率和性能。 在UE（用户设备）（100）所在的区域，向ENB（演进节点B）（111）发送附着请求（S310）。 ENB向MME（移动性管理实体）（121）发送附着请求（S320）。 MME向UE分配终端ID（S330），并向sGW（服务网关）（122）请求隧道建立用于承载建立（S340）。 生成隧道管理表（S350），并且sGW根据隧道建立向MME发送响应消息（S360）。 MME发送附加接受的响应消息（S370）。 ENB向MME发送附着完成消息（S380）。

公开(公告)号：KR1020040043287A

公开(公告)日：2004-05-24

申请号：KR1020020071506

申请日：2002-11-18

Applicant: 한국전자통신연구원 ,  삼성전자주식회사

Inventor： 신연승 ,  김창기 ,  조철회

IPC: H04W28/16 ,  H04W80/10

CPC classification number: H04W28/24 ,  H04W12/06 ,  H04W80/04 ,  H04W80/10

Abstract: PURPOSE: A method is provided to efficiently use wire/wireless resources by using the PDP(packet data protocol) session for management of packet transmission information commonly in one or more IP multimedia service sessions. CONSTITUTION: A method comprises a first step(702,703) of permitting a mobile multimedia terminal to set a routing data table for packet data transmission to the terminal, control station, service GPRS support node, and a gateway GPRS support node through a PDP session setting, register the requested IP multimedia service, and compare the transmission speed required in the IP multimedia session and the transmission speed provided from the PDP session; a second step(704,705) of changing the current transmission speed of the PDP context into the transmission speed excluding the transmission speed requested by the IP multimedia service if the transmission speed provided from the PDP session is higher than the transmission speed requested from the IP multimedia session, and setting a session by using the transmission speed requested by the IP multimedia service; a third step(708) of changing the current transmission speed of the PDP context into zero if the transmission speed provided from the PDP session is lower than the transmission speed requested from the IP multimedia session, and setting a session by using the transmission speed provided from the PDP session; a fourth step of classifying service characteristics into predetermined levels, and searching the PDP session satisfying the level requested by the IP multimedia service; a fifth step of registering the IP multimedia service if the satisfactory PDP session is searched, and performing a multimedia service session setting; and a sixth step of setting a new PDP session if the satisfactory PDP session is not searched, registering the IP multimedia service and performing a multimedia service session setting.

Abstract translation: 目的：提供一种通过使用PDP（分组数据协议）会话来有效地使用有线/无线资源的方法，用于在一个或多个IP多媒体业务会话中通常的分组传输信息的管理。 构成：一种方法包括：允许移动多媒体终端通过PDP会话设置向终端，控制台，服务GPRS支持节点和网关GPRS支持节点传送分组数据的路由数据表的第一步骤（702,703） 注册所请求的IP多媒体业务，并比较IP多媒体会话所需的传输速度和从PDP会话提供的传输速度; 如果从PDP会话提供的传输速度高于从IP多媒体请求的传输速度，则将PDP上下文的当前传输速度改变为除了IP多媒体业务所请求的传输速度之外的传输速度的第二步骤（704,705） 并通过使用IP多媒体业务所要求的传输速度来设置会话; 如果从PDP会话提供的传输速度低于从IP多媒体会话请求的传输速度，则将PDP上下文的当前传输速度改变为零的第三步骤（708），并且通过使用提供的传输速度来设置会话 从PDP会议; 将服务特性分类为预定级别的第四步骤，以及满足IP多媒体业务所要求的级别的PDP会话的搜索; 如果搜索令人满意的PDP会话，则注册IP多媒体业务的第五步骤，并且执行多媒体业务会话设置; 以及如果没有搜索令人满意的PDP会话，则设置新的PDP会话的第六步骤，注册IP多媒体服务并执行多媒体服务会话设置。

公开(公告)号：KR100419578B1

公开(公告)日：2004-02-21

申请号：KR1020020013340

申请日：2002-03-12

Applicant: 한국전자통신연구원 ,  엘지전자 주식회사

Inventor： 윤미영 ,  문정모 ,  김성희 ,  김창기

IPC: H04L12/28

Abstract: PURPOSE: A method for controlling a session in a diameter-based mobile Internet protocol network is provided to use session information including a session ID(IDentication) as an indicator of a diameter session and a session state of a subscriber for processing a message stably and process a request for setting and canceling the session according to an address request type of a visitor subscriber/a home subscriber. CONSTITUTION: When starting, a diameter server initializes session information and stores each session state as an idle state(301). After the initialization of the session information, a socket is produced for exchanging information with connected opponents' nodes(302). Thereafter, information on agents connected to the diameter server is collected(303). After waiting messages transmitted from opponent system information, kinds of messages capable of being received by the diameter server are discriminated(304). According to kinds of messages which can be received, diameter messages, AMR(AA-Mobile-Node-Request) message, AMA(AA-Mobile-Node-Answer) message, HAR(Home-Agent-MIP-Request) message, HAR(Home-Agent-MIP-Request) message, HAA(Home-Agent-MIP-Answer) message, STR(Session-Termination-Request) message, STA(Session-Termination-Answer) message, and STI(Session-Termination-Ind) message for applying a mobile IP(Internet Protocol) are processed respectively(305-311).

Abstract translation: 目的：提供一种用于控制基于直径的移动互联网协议网络中的会话的方法，以使用包括会话ID（IDentication）的会话信息作为用户的直径会话和会话状态以稳定处理消息的指示符， 根据访客用户/归属用户的地址请求类型处理设置和取消会话的请求。 构成：启动时，直径服务器初始化会话信息并将每个会话状态存储为空闲状态（301）。 在会话信息的初始化之后，产生用于与连接的对手的节点交换信息的套接字（302）。 之后，收集关于连接到直径服务器的代理的信息（303）。 在等待从对手系统信息发送的消息之后，区分（304）直径服务器能够接收的消息的种类。 根据可以接收的消息的种类，直径消息，AMR（AA-移动 - 节点 - 请求）消息，AMA（AA-移动 - 节点 - 应答）消息，HAR（家庭代理-MIP-请求）消息，HAR （家庭代理MIP-请求）消息，HAA（家庭代理-MIP-应答）消息，STR（会话终止 - 请求）消息，STA（会话终止 - 答复）消息和STI（会话终止 - Ind）消息分别被处理（305-311）。

公开(公告)号：KR102052388B1

公开(公告)日：2019-12-05

申请号：KR1020140040189

申请日：2014-04-03

Applicant: 한국전자통신연구원

Inventor： 김창기 ,  유정주 ,  홍진우

IPC: H04N21/6375 ,  H04N21/44 ,  H04L12/26

公开(公告)号：KR102046903B1

公开(公告)日：2019-11-20

申请号：KR1020140134583

申请日：2014-10-06

Applicant: 한국전자통신연구원 ,  연세대학교 원주산학협력단

Inventor： 김창기 ,  유정주 ,  홍진우 ,  서광덕 ,  이홍래

IPC: H04N21/234 ,  H04N21/235