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公开(公告)号：KR101368018B1
公开(公告)日：2014-02-27
申请号：KR1020120137195
申请日：2012-11-29
Applicant: 아주대학교산학협력단
CPC classification number: H04W74/0833 , H04W84/06
Abstract: The present invention relates to an access method for a satellite communication network, capable of having different frequency of a demand assigned frame and a random access frame and randomly accessing a free slot existing in the demand assigned frame. Therefore, the present invention includes the random access frame for a random access and the demand assigned frame for a demand assigned access caused by being requested by a terminal. The random access frame and the demand assigned frame transmit data by using a super frame formed by having the different frequency.
Abstract translation: 本发明涉及一种卫星通信网络的接入方法，其能够具有不同频率的需求分配帧和随机接入帧，并随机访问存在于需求分配帧中的空闲时隙。 因此，本发明包括用于随机接入的随机接入帧和由终端请求引起的用户分配接入请求分配帧。 随机接入帧和需求分配帧通过使用由不同频率形成的超帧来发送数据。
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公开(公告)号：KR101298083B1
公开(公告)日：2013-08-20
申请号：KR1020110095355
申请日：2011-09-21
Applicant: 아주대학교산학협력단
Abstract: 본 발명은 양방향 중계시스템에서의 선택적 분산 빔포밍 방법에 관한 것으로서, 보다 상세하게는 두 단말이 다수의 중계기를 통해 네트워크 코딩을 이용하여 양방향 통신을 수행하는 양방향 중계시스템에서 부분적인 채널 정보만을 이용하여 분산적 빔포밍을 수행할 수 있도록 함으로써 채널 정보 획득에 필요한 피드백 오버헤드를 획기적으로 줄이면서도, 최대 다이버시티 이득과 상계(uuper bound)에 매우 근접한 시스템 커패시티를 얻을 수 있으며, 빔포밍 가중치 계산을 위한 연산양을 획기적으로 낮추어 단말기의 복잡도를 낮출 수 있다.
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公开(公告)号：KR1020130031651A
公开(公告)日：2013-03-29
申请号：KR1020110095355
申请日：2011-09-21
Applicant: 아주대학교산학협력단
CPC classification number: H04L25/0224 , H04B7/0617 , H04B7/15528
Abstract: PURPOSE: A selective dispersion beam forming method in a bidirectional relay system is provided to perform dispersive beam forming by using only partial channel information. CONSTITUTION: A beam forming weighted value vector is calculated by a Rayleigh-Ritz method. The beam forming weighted value vector maximizes system capacity of a plurality of terminals. One of weighted values, which maximize the system capacity among the beam forming weighed value vector, is selected. Beam forming is performed by using the weighted value.
Abstract translation: 目的：提供双向中继系统中的选择性色散波束形成方法，通过仅使用部分信道信息来执行色散波束形成。 构成：用Rayleigh-Ritz法计算波束形成加权值向量。 波束形成加权值向量使多个终端的系统容量最大化。 选择加权值中的一个，其使波束形成加权值向量中的系统容量最大化。 通过使用加权值进行波束形成。
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54.发明授权직교 주파수 분할 다중 접속 기반의 무선통신시스템에서 항 재밍을 위한 맥 프레임 구조를 이용하여 통신하는 기지국, 통신방법 및 그 시스템 有权基站，通信方法和系统在基于OFDMA的无线通信系统中使用MAC帧结构进行抗干扰
公开(公告)号：KR101133013B1
公开(公告)日：2012-04-09
申请号：KR1020100073159
申请日：2010-07-29
Applicant: 아주대학교산학협력단
IPC: H04L27/26
Abstract: PURPOSE: A base station, a communicating method, and a system thereof using a MAC frame structure for anti-jamming in a wireless communication system based on orthogonal frequency division multiple access are provided to effectively correspond to the change of a hoping channel using an indicator for informing a hoping channel. CONSTITUTION: A base station(100) comprises a transceiver(10) for transmitting and receiving data, a memory(20), and a processor(30). The control information and program executive instruction are stored in a memory. The processor comprises a CIHS generating unit(31), an indicator generating unit(33), and an indicator changing unit(35). The CIHS generating unit hops the control information stored in the memory in a down-link frame. The indicator generating unit is used in order to inform the CIHS information.
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公开(公告)号：KR1020120015615A
公开(公告)日：2012-02-22
申请号：KR1020100077862
申请日：2010-08-12
Applicant: 아주대학교산학협력단
IPC: H04J11/00
CPC classification number: H04W56/00 , H04L5/0037 , H04L5/0044 , H04L5/0062 , H04L27/2689 , H04W74/00 , H04L27/2688
Abstract: PURPOSE: A multiple access based on OFDM(Orthogonal Frequency Division Multiplexing) and a communication appratus for controlling the same are provided to greatly increase data throughput and the number of users using concurrent service by drastically reducing an overhead over a time synchronization in comparison of WiMAX(World Interoperability for Microwave Access). CONSTITUTION: A predetermined sync control signal is transmitted to many unspecified terminal. Test message is received from a plurality of terminals as a response for the sync control signal. The terminal receiving the test message within a first unit time from a base period is classified into a first group. The terminal receiving the test message within an arbitrary n number of unit times from the base period is classified into an n group. An allowable time for using sub channels is allocated by group. The terminals receive and transmit data by partly occupying sub channels and symbols within the time which is allocated to a corresponding group.
Abstract translation: 目的：提供基于OFDM（正交频分复用）的多址和用于控制它的通信设备，以便在WiMAX的比较中大大增加数据吞吐量和使用并发服务的用户在时间同步上大幅减少开销 （世界微波接入互操作性）。 构成：预定的同步控制信号被发送到许多未指定的终端。 作为对同步控制信号的响应，从多个终端接收测试消息。 在从基准时段开始的第一单位时间内接收测试消息的终端被分类为第一组。 在从基准时段起的任意n个单位时间内接收到测试消息的终端被分类为n组。 分组使用子频道的允许时间。 终端通过部分占用分配给相应组的时间内的子信道和符号来接收和发送数据。
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Patent Agency Ranking
公开(公告)号：KR101106102B1
公开(公告)日：2012-01-18
申请号：KR1020100025367
申请日：2010-03-22
Applicant: 아주대학교산학협력단
Abstract: 본 발명은 무선 통신망을 지속적으로 운용하는 시스템 및 그 방법에 관한 것이다. 본 발명은 무선 근거리 통신망을 기반으로 하는 무선 통신 시스템에서 물리 계층과 데이터링크 계층에서의 재밍 공격을 탐지하고 그 위험의 정도에 따라 경고하는 무선 통신망 운용 시스템 및 그 방법을 제공한다. 특히, 본 발명은 재밍으로 인하여 사용중인 채널의 운용이 불가할 경우 채널 변경 또는 채널 호핑을 통해 재밍을 회피함으로써 통신망을 지속적으로 유지할 수 있는 무선 통신망 운용 시스템 및 그 방법을 제공한다. 본 발명에 따르면, 능동적으로 불법 단말 및 비인가 무선 액세스 포인트를 차단하면서 채널 변경이나 채널 호핑을 통해 지속적인 통신망과 항재밍 성능을 제공할 수 있다.
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公开(公告)号：KR101082171B1
公开(公告)日：2011-11-09
申请号：KR1020050042847
申请日：2005-05-23
Applicant: 아주대학교산학협력단
CPC classification number: H04J13/12 , H04J13/004 , H04J13/0074 , H04L5/0016 , H04L27/2602 , H04L27/2605 , H04L27/2621
Abstract: 본발명은새로운 Cyclic-OC code를제공함으로써기존의 OFDM-CDMA 시스템상에서다이버시티이득을극대한다. 또한각 데이터심볼의확산열을다수의병렬처리가가능한구조를제공함으로써다중사용자간 간섭을줄이기위해필요한복잡한수신기구조를간략화시킨다.
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公开(公告)号：KR101040608B1
公开(公告)日：2011-06-10
申请号：KR1020090131430
申请日：2009-12-28
Applicant: 아주대학교산학협력단
CPC classification number: G06F21/606 , G06F11/3058 , G06F21/602 , H04L9/0861
Abstract: PURPOSE: A method for protecting data using environment characteristic information is provided to control a data inquiry irrelevant to possessed password key by comparing environment characteristic information set with an environment characteristic information of a user. CONSTITUTION: A data providing device obtains a first environment characteristic value form an external device provided form environment characteristic(S10). A data supplying device generates a first master key by using a session key and a first environment characteristic information value(S20). The data supplying device provides a data using device by encoding data as the first master key(S30). The data using device receives a second environment characteristic information value from the external device.
Abstract translation: 目的：提供一种使用环境特征信息保护数据的方法，通过将环境特征信息集与用户的环境特征信息进行比较来控制与所拥有密码密钥无关的数据查询。 构成：数据提供装置从形成环境特性的外部装置获取第一环境特性值（S10）。 数据提供装置通过使用会话密钥和第一环境特性信息值来生成第一主密钥（S20）。 数据提供装置通过对作为第一主密钥的数据进行编码来提供数据使用装置（S30）。 数据使用装置从外部设备接收第二环境特性信息值。
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公开(公告)号：KR1020110007834A
公开(公告)日：2011-01-25
申请号：KR1020090065474
申请日：2009-07-17
Applicant: 아주대학교산학협력단
CPC classification number: G06F21/6209 , G06F2221/2107 , G06F2221/2111 , H04L9/0872
Abstract: PURPOSE: A method for protecting a classified digital document from unauthorized reading is provided to selectively authorize the file reading by the physical location of a user. CONSTITUTION: A classified document file which a user wants to read is received from a document management server(310). A location authentication is performed between the location reference node adjacent to the document security program and the user(330). If the location authentication is succeeded, the received classified digital document file gets the location information of user from the location reference node, and decoded(360). If the authentication of the user is succeeded, the location reference node transmits the locating key to the document security program of the user.
Abstract translation: 目的：提供一种用于保护分类的数字文档免受未经授权的读取的方法，以便通过用户的物理位置选择性地授权文件读取。 构成：从文件管理服务器（310）接收用户想要阅读的分类文件文件。 在与文档安全程序相邻的位置参考节点与用户（330）之间执行位置认证。 如果位置认证成功，则接收到的分类数字文档文件从位置参考节点获取用户的位置信息，并进行解码（360）。 如果用户的认证成功，则位置参考节点将定位密钥发送给用户的文档安全程序。
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