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公开(公告)号：KR1020110019722A
公开(公告)日：2011-02-28
申请号：KR1020100080858
申请日：2010-08-20
Applicant: 한국전자통신연구원
IPC: H04N7/015
CPC classification number: H04B14/08 , H04B7/24 , H04H2201/11 , H04L5/0007
Abstract: PURPOSE: An RF signal transceiving device is provided to use guide bands based on the frequency of consumption, to combine a server providing each block, and to provide a variable high definition service. CONSTITUTION: An RF signal generating method comprises as follows: a step of generating a first sub carrier block by using a subcarrier including a first symbol(S410), a step of diving a sub carrier included in a first sub carrier block(S420), a step of inserting the divided sub carrier into a guide band between a plurality of rearranged second sub carriers(S430). A second sub carrier block is generated by using a sub carrier including a second symbol.
Abstract translation: 目的：提供RF信号收发设备，根据消费频率使用指南频带，组合提供每个块的服务器，并提供可变的高清晰度服务。 RF信号生成方法包括以下步骤：通过使用包括第一符号的副载波（S410）产生第一子载波块的步骤，潜水包括在第一子载波块（S420）中的子载波的步骤， 将分割的子载波插入到多个重新排列的第二子载波之间的引导带中的步骤（S430）。 通过使用包括第二符号的子载波来生成第二子载波块。
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公开(公告)号：KR1020100072891A
公开(公告)日：2010-07-01
申请号：KR1020080131434
申请日：2008-12-22
Applicant: 한국전자통신연구원
IPC: H04N5/50 , H04N21/434
CPC classification number: H04N21/6125 , H04N21/42607 , H04N21/472 , H04N21/64322
Abstract: PURPOSE: A method and an apparatus for an Internet protocol television service to switch a channel are provided to supply user convenience by selecting broadcasting contents of a maximum resolution in priority. CONSTITUTION: A channel switching request processor(510) requests channel switching into a network switch, and a broadcasting stream receiver(520) receives a broadcasting stream of a corresponding channel from a switch. A decoding processor(530) decodes broadcasting contents in priority, wherein the broadcasting contents corresponds to the maximum resolution among broadcasting streams. A broadcasting content transmitter(540) transmits the decoded broadcasting contents to a display device.
Abstract translation: 目的：提供用于互联网协议电视服务切换频道的方法和装置，以通过选择优先级最大分辨率的广播内容来提供用户便利。 构成：信道切换请求处理器（510）向网络交换机请求信道切换，广播流接收机（520）从交换机接收相应信道的广播流。 解码处理器（530）优先解码广播内容，其中广播内容对应于广播流中的最大分辨率。 广播内容发送器（540）将解码的广播内容发送到显示装置。
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公开(公告)号：KR1020100050014A
公开(公告)日：2010-05-13
申请号：KR1020080109091
申请日：2008-11-04
Applicant: 한국전자통신연구원
IPC: H04N21/2387 , H04N21/43
CPC classification number: H04N21/4333 , H04N7/17318 , H04N21/231 , H04N21/6408 , H04N21/658
Abstract: PURPOSE: A broadcasting receiving method for reducing the used amount of a communications channel and an apparatus thereof are provided to supply the broadcasting program to the user. CONSTITUTION: A program storing unit(420) stores a first broadcasting program transmitted from the broadcasting transmission unit at the arbitrary point of time. A controller(430) confirms the location of the arbitrary selection point while the first broadcasting program is broadcasted. The controller interlinks the first broadcasting program and the second broadcasting program to the arbitrary selection point. A display unit(440) displays the first broadcasting program or the second broadcasting program.
Abstract translation: 目的：提供用于减少通信信道的使用量的广播接收方法及其装置，以向用户提供广播节目。 方案：程序存储单元（420）存储在任意时间点从广播发送单元发送的第一广播节目。 当广播第一广播节目时，控制器（430）确认任意选择点的位置。 控制器将第一广播节目和第二广播节目互连到任意选择点。 显示单元（440）显示第一广播节目或第二广播节目。
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公开(公告)号：KR100926236B1
公开(公告)日：2009-11-09
申请号：KR1020070125471
申请日：2007-12-05
Applicant: 한국전자통신연구원
Abstract: 직교 부호를 이용한 디지털 데이터 전송 장치가 개시된다. 직교 부호를 이용한 디지털 데이터 전송 장치는 부호화된 복수개의 비트스트림을 포함하는 하나 이상의 프레임으로 구성된 미니슬롯을 시간 구간에 따라 분할하여 형성하는 프레임기, 전송하고자 하는 신호 배열에 따라 상기 복수개의 비트스트림을 각각 변조 심볼로 맵핑하는 심볼 맵퍼 및 상기 심볼 맵퍼로부터 동위성분과 직교성분으로 구분되어 출력된 상기 각 변조 심볼에 대한 신호를 시간 영역으로 확산시키는 확산기를 포함한다.
S-CDM/TDMA, 미니슬롯, 확산 부호, 확산 구간, 변조 심볼, 프레임기, 심볼 맵퍼, 확산기(spreader), 교삽(interleaving)-
公开(公告)号：KR100923858B1
公开(公告)日：2009-10-28
申请号：KR1020070125144
申请日：2007-12-04
Applicant: 한국전자통신연구원
CPC classification number: H04L63/065 , H04L12/2861
Abstract: 본 발명은 케이블 네트워크 동적 멀티캐스팅 세션에서의 보안 제어 방법에 관한 것으로, 더욱 상세하게는 DOCSIS 3.0 네트워크와 같은 케이블 네트워크 동적 멀티캐스트 세션에서의 순방향 및 역방향의 보안을 제어하기 위한 방법에 관한 것이다. 본 발명은 케이블 네트워크상의 동적 멀티캐스트 세션에서의 보안 제어 방법에 있어서, 제1 DSID 및 제1 SAID가 할당되고, 제1 케이블 모뎀이 가입된 멀티캐스트 그룹을 유지하는 단계; 제2 케이블 모뎀으로부터 가입멀티캐스트세션 메시지를 수신하는 단계; 상기 가입멀티캐스트세션 메시지에 대응하여 상기 제2 케이블 모뎀으로 멀티캐스트 파라미터 변경을 위한 DBC 메시지를 교환하는 단계; 및 상기 제1 DSID에 대응하는 제1 트래픽 암호화 키(TEK)를 제2 트래픽 암호화 키로 업데이트하는 단계를 포함하는 것을 특징으로 하는 보안 제어 방법을 제공한다.
DOCSIS, 케이블 모뎀, 케이블 모뎀 단말 시스템, 동적 멀티캐스트 세션, 보안-
Patent Agency Ranking
公开(公告)号：KR1020090058394A
公开(公告)日：2009-06-09
申请号：KR1020070125144
申请日：2007-12-04
Applicant: 한국전자통신연구원
CPC classification number: H04L63/065 , H04L12/2861
Abstract: A cable network system and a method for controlling security in a cable network dynamic multicast session are provided to transmit a DBC message to a cable modem terminal system and update a traffic encryption key after a cable modem transmits a leave multicast session message, thereby controlling forward security. The first DSID(Downstream Service ID) and the first SAID(Security Association ID) are allocated. A multicast group to which the first and second cable modems are subscribed is maintained(S410). A leave multicast session message is received from the second cable modem(S420). A DBC(Dynamic Bonding Change) message for changing a multicast parameter is exchanged with the second cable modem(S430). The first traffic encryption key corresponding to the first DSID is updated to the second traffic encryption key(S440).
Abstract translation: 提供一种用于控制有线网络动态多播会话中的安全性的有线网络系统和方法，用于向电缆调制解调器终端系统发送DBC消息，并在电缆调制解调器发送离开多播会话消息之后更新业务加密密钥，从而控制向前 安全。 第一个DSID（下游服务ID）和第一个SAID（安全关联ID）被分配。 保持第一和第二电缆调制解调器订阅的多播组（S410）。 从第二电缆调制解调器接收离开组播会话消息（S420）。 用于改变多播参数的DBC（动态绑定更改）消息与第二缆线调制解调器交换（S430）。 对应于第一DSID的第一业务加密密钥被更新为第二业务加密密钥（S440）。
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公开(公告)号：KR1020090056653A
公开(公告)日：2009-06-03
申请号：KR1020070123893
申请日：2007-11-30
Applicant: 한국전자통신연구원
CPC classification number: H04L12/2801 , H04B1/709 , H04B3/06 , H04L27/22 , H04L27/2695
Abstract: A cable modem for compensating for the frequency offset and phase offset and a method for operating the same are provided to compensate for the frequency offset simply and efficiently. A signal receiving unit receives an input signal in which a preamble including a plurality of repeated sections is included through a cable network. A frequency offset estimator(410) estimates the frequency offset by using the identity of sequences included in each repeated section. According to the estimated frequency offset, a compensation(430) compensates for the input signal. The preamble comprises the first repeated section and the second repeated section. According to the consistency degree of sequences included in the first and second repeated section, the frequency offset estimator estimates the frequency offset.
Abstract translation: 提供用于补偿频偏和相位偏移的电缆调制解调器及其操作方法，以简单有效地补偿频偏。 信号接收单元通过有线网络接收包括多个重复部分的前同步码的输入信号。 频率偏移估计器（410）通过使用包括在每个重复部分中的序列的身份来估计频率偏移。 根据估计的频率偏移，补偿（430）补偿输入信号。 前导码包括第一重复部分和第二重复部分。 根据包括在第一和第二重复部分中的序列的一致性，频率偏移估计器估计频率偏移。
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公开(公告)号：KR1020090056652A
公开(公告)日：2009-06-03
申请号：KR1020070123892
申请日：2007-11-30
Applicant: 한국전자통신연구원
IPC: H04N5/50
Abstract: A device and a method for receiving a broadcasting broadcast service continuously in an MFN(Multi Frequency Network) broadcasting network are provided to receive the continuous broadcasting service stably during moving by reducing a channel search time based on channel information classified into each town. A position information receiver(20) receives location information. A channel information storage(50) comprises the location ready for receiving channel information. A broadcasting receiver(70) obtains available channel corresponding to the location information from the channel information storage and receives a broadcast service through the obtained.
Abstract translation: 提供一种用于在MFN（多频网络）广播网络中连续地接收广播广播服务的装置和方法，用于通过基于分类到每个城镇的频道信息减少频道搜索时间来稳定地在移动期间接收连续广播服务。 位置信息接收器（20）接收位置信息。 信道信息存储（50）包括准备接收信道信息的位置。 广播接收机（70）从信道信息存储器获取与位置信息对应的可用信道，并通过所获得的接收广播服务。
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公开(公告)号：KR1020080052199A
公开(公告)日：2008-06-11
申请号：KR1020070047568
申请日：2007-05-16
Applicant: 한국전자통신연구원
Abstract: A method and an apparatus for hierarchical network connection between a user group and a resource group are provided to minimize a cost value of key information while maintaining both the forward secrecy and the backward secrecy in the hierarchically connected relation between the user group and the resource group. A method for hierarchical network connection between a user group and a resource group comprises the following several steps. A hierarchical network connection apparatus sets up hierarchical connection between the user group and the resource group(501). Then, the apparatus determines redundancy of the hierarchical connection(503). At this time, the apparatus can determine the redundancy from the view of the user group or the resource group(505,507). The apparatus determines which one between the view of the user group and that of the resource group causes the higher redundancy(509). The apparatus forms the hierarchical connection by a star graph according to the determined view of the user group or the resource group(511). The apparatus eliminates the redundancy while synthesizing each hierarchical connection(513). The apparatus finally completes hierarchical connection relations of the overall network(515).
Abstract translation: 提供了一种在用户组和资源组之间进行分级网络连接的方法和装置，以便在维护用户组和资源组之间的分层连接关系中的前向保密性和后向保密性的同时最小化密钥信息的成本值 。 用户组和资源组之间的分级网络连接的方法包括以下几个步骤。 分级网络连接装置在用户组和资源组之间建立分层连接（501）。 然后，该装置确定分层连接的冗余（503）。 此时，设备可以从用户组或资源组的角度确定冗余（505,507）。 该装置确定用户组的视图和资源组的视图之间的哪一个导致更高的冗余（509）。 该装置根据确定的用户组或资源组的视图通过星形图形成分层连接（511）。 该装置在合成每个分层连接（513）时消除了冗余。 该装置最终完成整个网络的分层连接关系（515）。
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140.发明授权
公开(公告)号：KR100728260B1
公开(公告)日：2007-06-13
申请号：KR1020060091987
申请日：2006-09-21
Applicant: 한국전자통신연구원
Abstract: A key tree constructing method for controlling a hierarchical access in a broadcasting and communication system and a key management method using the same are provided to reduce a storage overhead and a communication overhead generated in a dynamic management in a capacity of a user. A key tree constructing method for controlling a hierarchical access in a broadcasting and communication system comprises the following several steps. A key tree whose root key is a user group key allocated to a corresponding group for each user group is constructed by using a hierarchical access relationship between the user group and a resource. A connected network is constructed by connecting a corresponding session key for each resource to the user group key allocated to the user group affiliated to a corresponding resource on the basis of the hierarchical access relationship. A hierarchical access control key tree is constructed by connecting the key tree for each user group to the user group key on the connected network.
Abstract translation: 提供了一种用于控制广播和通信系统中的分层访问的密钥树构建方法和使用该密钥管理方法的密钥管理方法，以减少在用户的能力下的动态管理中产生的存储开销和通信开销。 一种用于控制广播和通信系统中的分层接入的关键树构建方法包括以下几个步骤。 通过使用用户组和资源之间的分层访问关系构造其根密钥是分配给每个用户组的对应组的用户组密钥的密钥树。 基于分层访问关系，通过将用于每个资源的对应会话密钥连接到分配给属于对应资源的用户组的用户组密钥来构建连接网络。 分层访问控制密钥树通过将每个用户组的密钥树连接到所连接的网络上的用户组密钥来构建。
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