公开(公告)号：US06983132B2

公开(公告)日：2006-01-03

申请号：US10616043

申请日：2003-07-10

申请人： Sang-hyun Woo ,  Seong-soo Lee ,  Jong-ae Park

发明人： Sang-hyun Woo ,  Seong-soo Lee ,  Jong-ae Park

IPC分类号： H04B1/02 ,  H04B1/04

CPC分类号： H03D7/165 ,  H04B1/406

摘要： A multi-band radio frequency (RF) receiving method in a mobile communication system having a reduced size and cost includes receiving RF wave signals for four or more non-overlapping bands, primarily filtering a first wide band including adjacent first and second bands and a second wide band including adjacent third and fourth bands from the received RF wave signals, low-noise amplifying the RF wave signals of the first and second wide bands, respectively, secondarily filtering a third wide band including adjacent second and third bands and a fourth wide band including first and fourth bands from the low-noise amplified RF wave signals of the first and second wide bands, generating two band RF wave signals to be simultaneously received, and frequency-down converting the two band RF wave signals generated in the secondary filtering step into two band intermediate frequency wave signals by means of first and second oscillation frequencies.

摘要翻译： 具有减小的尺寸和成本的移动通信系统中的多频带射频（RF）接收方法包括接收四个或更多个非重叠频带的RF波信号，主要滤波包括相邻的第一和第二频带的第一宽带，以及 第二宽带，包括来自接收的RF波信号的相邻的第三和第四频带，分别对第一和第二宽带的RF波信号进行低噪声放大，二次滤波包括相邻的第二和第三频带的第三宽频带和第四宽 包括来自第一和第二宽带的低噪声放大RF波信号的第一和第四频带，产生要同时接收的两个频带RF波信号，以及对在二次滤波中产生的两个频带RF波信号进行降频转换 通过第一和第二振荡频率进入双频带中频信号。

公开(公告)号：US07099647B2

公开(公告)日：2006-08-29

申请号：US10767089

申请日：2004-01-29

申请人： Sang-hyun Woo ,  Jong-ae Park

发明人： Sang-hyun Woo ,  Jong-ae Park

IPC分类号： H04B1/00 ,  H04B1/16 ,  H04B1/18 ,  H04B1/28

CPC分类号： H04B1/30 ,  H04B1/08

摘要： A single chip direct conversion transceiver that includes a substrate on which a mixer unit and a local oscillator are provided as a circuit, and a positive hole formed between the mixer unit and the local oscillator and filled with a conductive plug to block signal leakage. A shield ground surface is formed above the substrate and blocks signal leakage occurring when the signals received through the antenna are input into the mixer and signal leakage occurring when the reference signal is input into the mixer from the local oscillator. A first interconnection is formed above the shield ground surface and connects the mixer unit and the local oscillator. Dielectric layers are formed between the substrate and the shield ground surface and on the shield ground surface to cover the first interconnection.

摘要翻译： 一种单芯片直接转换收发器，包括其上设置有混频器单元和本地振荡器的基板作为电路，以及在混频器单元和本地振荡器之间形成的填充有导电插塞以阻挡信号泄漏的正空穴。 屏蔽地表面形成在衬底上方，并且当通过天线接收的信号被输入混频器时发生信号泄漏并且当参考信号从本地振荡器输入到混频器时发生信号泄漏。 第一互连形成在屏蔽接地表面上方，并连接混频器单元和本地振荡器。 介电层形成在基板和屏蔽接地面之间以及屏蔽地表面上以覆盖第一互连。

公开(公告)号：US07835525B2

公开(公告)日：2010-11-16

申请号：US10613125

申请日：2003-07-07

申请人： Kyung-hun Jang ,  Jong-ae Park ,  In-sun Lee

发明人： Kyung-hun Jang ,  Jong-ae Park ,  In-sun Lee

IPC分类号： H04K1/00

CPC分类号： H04W12/04 ,  H04L9/0833 ,  H04L63/065 ,  H04L63/068 ,  H04L63/083 ,  H04L2209/80 ,  H04L2463/062 ,  H04W84/12 ,  H04W84/18

摘要： A cryptographic method using dual encryption keys and a wireless local area network (LAN) system therefor includes (a) generating a first group key in N wireless terminals forming an ad-hoc group, where N is equal to or greater than two, (b) generating a second group key in a main wireless terminal to perform a key distribution center function among the N wireless terminals, and transmitting the second group key to (N−1) sub wireless terminal, and (c) encoding data using the second group key, and transmitting the encoded data between the N wireless terminals. Data security in a wireless LAN system of an ad-hoc network is increased by creating a first group key having a low frequency of use using a group password, and using a random key generation algorithm to create, distribute, and modify a second group key in a wireless terminal functioning as a key distribution center.

摘要翻译： 使用双加密密钥的密码方法及其无线局域网（LAN）系统包括：（a）在形成自组织的N个无线终端中生成第一组密钥，其中N等于或大于2，（b ）在所述N个无线终端中生成主无线终端中的第二组密钥，以执行密钥分发中心功能，以及将所述第二组密钥发送到（N-1）子无线终端，以及（c）使用所述第二组对所述数据进行编码 并且在N个无线终端之间传送编码数据。 通过使用组密码创建具有低使用频率的第一组密钥，并且使用随机密钥生成算法来创建，分发和修改第二组密钥来增加自组织网络的无线LAN系统中的数据安全性 在作为关键配送中心的无线终端中。

公开(公告)号：US07898961B2

公开(公告)日：2011-03-01

申请号：US10652041

申请日：2003-09-02

申请人： Kyung-hun Jang ,  Hyo-sun Hwang ,  Jong-ae Park

发明人： Kyung-hun Jang ,  Hyo-sun Hwang ,  Jong-ae Park

IPC分类号： H04L1/00

CPC分类号： H04L1/16 ,  H04L1/0007 ,  H04L1/0026 ,  H04L1/0034

摘要： A method for managing a segment threshold includes determining whether a packet has been transmitted to a predetermined terminal, receiving from the predetermined terminal a response message indicating that the predetermined terminal has received the packet without any errors, if a packet has been transmitted to the predetermined terminal, receiving signal intensity data of a current packet transmitted from the predetermined terminal, and adjusting the segment threshold using the received signal intensity data of a current packet, if the response message has been received.

摘要翻译： 用于管理分段阈值的方法包括：确定分组是否已被发送到预定终端，如果分组已被传送到预定的终端，则从预定终端接收指示预定终端已经接收到分组而没有任何错误的响应消息 接收从预定终端发送的当前分组的信号强度数据，并且如果已经接收到响应消息，则使用当前分组的接收信号强度数据来调整分段阈值。

公开(公告)号：US07706539B2

公开(公告)日：2010-04-27

申请号：US10613023

申请日：2003-07-07

申请人： Kyung-hun Jang ,  Jong-ae Park ,  In-sun Lee

发明人： Kyung-hun Jang ,  Jong-ae Park ,  In-sun Lee

IPC分类号： H04K1/00

CPC分类号： H04L61/2038 ,  H04L29/12254 ,  H04L29/12839 ,  H04L61/6022 ,  H04L63/0414 ,  H04W8/26 ,  H04W12/02 ,  H04W74/00 ,  H04W84/12

摘要： A method of guaranteeing users' anonymity and a wireless LAN system therefor are provided. In a wireless LAN system, the method of guaranteeing user' anonymity includes (a) creating a plurality of temporary address sets, each of which corresponds to a unique Media Access Control (MAC) address of a wireless terminal and transmitting the temporary address set to the corresponding wireless terminal, and (b) performing data packet transmission between the wireless terminal and the wireless access node using a temporary address selected from the temporary address set as a source address or a destination address. Therefore, it is possible to guarantee users' anonymity and improve security of a system by not exposing a MAC address during data packet transmission between a wireless terminal and a wireless access node.

摘要翻译： 提供了一种保证用户匿名的方法及其无线局域网系统。 在无线LAN系统中，保证用户匿名性的方法包括（a）创建多个临时地址集，每个临时地址集对应于无线终端的唯一的媒体访问控制（MAC）地址，并将临时地址集发送到 相应的无线终端，以及（b）使用从作为源地址或目的地地址设置的临时地址中选择的临时地址，在无线终端与无线接入节点之间执行数据分组传输。 因此，可以通过在无线终端和无线接入节点之间的数据分组传输期间不暴露MAC地址来保证用户的匿名性并提高系统的安全性。

公开(公告)号：US07411903B2

公开(公告)日：2008-08-12

申请号：US10616034

申请日：2003-07-10

申请人： Kyung-hun Jang ,  Jong-ae Park ,  Hyo-sun Hwang

发明人： Kyung-hun Jang ,  Jong-ae Park ,  Hyo-sun Hwang

IPC分类号： H04L12/26

CPC分类号： H04L65/608 ,  H04L1/007 ,  H04L1/1671 ,  H04L1/1809 ,  H04L1/1835 ,  H04L29/06027 ,  H04L47/10 ,  H04L47/2425 ,  H04L47/26 ,  H04L47/27 ,  H04L47/32 ,  H04L47/34 ,  H04L47/35

摘要： A method for generating packet-based transmission control parameters includes (a) receiving class information of an audio-video (AV) application and characteristic information of an AV packet, from the AV application, (b) receiving status information of a wireless channel and buffer storage time information of the AV packet, from a medium access control (MAC) layer, and (c) generating and outputting the packet-based transmission control parameters on the basis of the received information. In addition, a selective retransmission method includes (a) transmitting packets of an MPEG-2 frame in real-time, (b) checking for any transmission error after the transmission, and (c) if any transmission error is generated, retransmitting only packets of an I-frame. Therefore, it is possible to efficiently support AV service in wireless communication by dynamically controlling transmission control parameters according to a buffer status and by reflecting the characteristics of the AV frames.

摘要翻译： 一种用于生成基于分组的传输控制参数的方法包括（a）从AV应用接收音频视频（AV）应用的类信息和AV分组的特征信息，（b）接收无线信道的状态信息，以及 来自介质访问控制（MAC）层的AV分组的缓冲存储时间信息，以及（c）基于所接收的信息生成并输出基于分组的传输控制参数。 此外，选择性重传方法包括（a）实时发送MPEG-2帧的分组，（b）检查发送后的任何传输错误，以及（c）如果产生了任何传输错误，则仅重传分组 的I帧。 因此，可以通过根据缓冲器状态动态地控制传输控制参数并通过反映AV帧的特性来有效地支持无线通信中的AV服务。

公开(公告)号：US07739491B2

公开(公告)日：2010-06-15

申请号：US10607917

申请日：2003-06-26

申请人： Kyung-hun Jang ,  In-sun Lee ,  Jong-ae Park

发明人： Kyung-hun Jang ,  In-sun Lee ,  Jong-ae Park

IPC分类号： H04L29/06 ,  H04W36/00

CPC分类号： H04L63/104 ,  H04L63/062 ,  H04W12/04 ,  H04W12/08 ,  H04W36/0038 ,  H04W84/12

摘要： An encryption key distribution method capable of performing fast roaming by differentially distributing encryption keys in advance, according to access authorization classes, in a wireless access network and a roaming method using distributed encryption keys are provided. The encryption key distribution method comprises: receiving a command to communicate with an access point not available for communication using an encryption key currently selected in the encryption key set; determining access authorization of the access point not available for communications; selecting an encryption key from the encryption key set obtained in advance corresponding to the determined access authorization; and using the selected encryption key to encrypt a transmission message and communicate with the access point not available for communication. The method reduces the delay time, which is caused by encryption key distribution while a wireless terminal is traveling, such that roaming and a hand-off are carried out quickly and safely, and user convenience and safe transmission of data are achieved.

摘要翻译： 提供一种加密密钥分发方法，其能够根据访问授权等级在无线接入网络中以及使用分布式加密密钥的漫游方法预先差分地分配加密密钥来进行快速漫游。 加密密钥分发方法包括：使用当前在加密密钥集合中选择的加密密钥接收与不可用于通信的接入点进行通信的命令; 确定不可用于通信的接入点的接入授权; 从对应于所确定的访问授权的预先获得的加密密钥集中选择加密密钥; 并使用所选择的加密密钥加密传输消息并与不可用于通信的接入点进行通信。 该方法减少了无线终端正在行驶时由加密密钥分配引起的延迟时间，从而实现漫游和切换快速安全，实现用户方便和安全的数据传输。

公开(公告)号：US07542438B2

公开(公告)日：2009-06-02

申请号：US10612141

申请日：2003-07-02

申请人： Kyung-Hun Jang ,  Hyo-sun Hwang ,  Jong-ae Park

发明人： Kyung-Hun Jang ,  Hyo-sun Hwang ,  Jong-ae Park

IPC分类号： H04H20/71 ,  H04L12/28

CPC分类号： H04W88/04 ,  H04L2001/0093

摘要： A reliable multicast data retransmission method by grouping wireless terminals in a wireless communication environment and performing multicast data retransmission for a particular group of wireless terminals that needs multicast data retransmission, thereby providing reliable multicast data retransmission and improving the efficiency of a network. The multicast data retransmission method includes grouping wireless terminals based on distances between an access point and the wireless terminals and the amplitudes of signals output from the wireless terminals, selecting a repeater, which is to retransmit multicast packets, from each group and arranging the order in which repeaters retransmit multicast packets, creating a multicast packet train header indicating characteristics of each of the multicast packets, multicasting the created multicast packet train header. The multicast packets are retransmitted in the arranged order.

摘要翻译： 一种可靠的组播数据重传方法，通过对无线通信环境中的无线终端进行分组，对需要组播数据重传的特定无线终端组进行组播数据重传，从而提供可靠的组播数据重传，提高网络效率。 组播数据重传方法包括基于接入点与无线终端之间的距离以及从无线终端输出的信号的幅度对无线终端进行分组，从每个组中选择重传多播分组的中继器，并将顺序排列在 所述中继器重传多播分组，创建指示每个组播分组的特征的组播分组序列头，组播所创建的多播分组列表头。 组播数据包按照排列顺序进行重传。