公开(公告)号：US20080089518A1

公开(公告)日：2008-04-17

申请号：US11871683

申请日：2007-10-12

Applicant: Alexander Reznik ,  Alain Briancon ,  Yevgeniy Dodis ,  Yogendra Shah ,  Chunxuan Ye ,  Robert DiFazio ,  Inhyok Cha

Inventor： Alexander Reznik ,  Alain Briancon ,  Yevgeniy Dodis ,  Yogendra Shah ,  Chunxuan Ye ,  Robert DiFazio ,  Inhyok Cha

IPC: H04L9/20

CPC classification number: H04W12/04 ,  H04L9/065 ,  H04L9/0869 ,  H04L9/0875 ,  H04L63/0457 ,  H04L2209/08 ,  H04L2209/80 ,  H04W12/02

Abstract: A secret stream of bits begins by receiving a public random stream contained in a wireless communication signal at a transmit/receive unit. The public random stream is sampled and specific bits are extracted according to a shared common secret. These extracted bits are used to create a longer secret stream. The shared common secret may be generated using JRNSO techniques, or provided to the transmit/receive units prior to the communication session. Alternatively, one of the transmit/receive unit is assumed to be more powerful than any potential eavesdropper. In this situation, the powerful transmit/receive unit may broadcast and store a public random stream. The weaker transmit/receive unit selects select random bits of the broadcast for creating a key. The weaker transmit/receive unit sends the powerful transmit/receive unit the selected bit numbers, and powerful transmit/receive unit uses the random numbers to produce the key created by the weaker transmit/receive unit.

Abstract translation: 秘密的比特流开始于在发送/接收单元处接收包含在无线通信信号中的公共随机流。 公共随机流被采样，并且根据共享的公共秘密提取特定位。 这些提取的比特用于创建更长的秘密流。 可以使用JRNSO技术生成共享公用秘密，或者在通信会话之前提供给发送/接收单元。 或者，假设发射/接收单元之一比任何潜在的窃听者更强大。 在这种情况下，强大的发送/接收单元可以广播和存储公共随机流。 较弱的发送/接收单元选择用于创建密钥的广播的选择随机比特。 较弱的发射/接收单元发送强大的发射/接收单元所选择的位号，强大的发射/接收单元使用随机数产生由较弱发射/接收单元产生的密钥。

公开(公告)号：US20080059804A1

公开(公告)日：2008-03-06

申请号：US11843517

申请日：2007-08-22

Applicant: Yogendra Shah ,  Inhyok Cha ,  Alexander Reznik

Inventor： Yogendra Shah ,  Inhyok Cha ,  Alexander Reznik

IPC: H04L9/32 ,  G06F17/00 ,  G06F21/00

CPC classification number: H04L63/0442 ,  G06F21/41 ,  H04L63/0815 ,  H04L63/083 ,  H04L63/0884

Abstract: A method and apparatus for password management and single sign-on (SSO) access based on trusted computing (TC) technology. The methods implement the Trusted Computing Group (TCG)'s trusted platform module (TPM), which interacts with both proxy SSO unit and web-accessing applications to provide a secure, trusted mechanism to generate, store, and retrieve passwords and SSO credentials. The various embodiments of the present invention allow a user to hop securely and transparently from one site to another that belong to a pre-identified group of sites, after signing on just once to a secured proxy residing at the user's device.

Abstract translation: 一种基于可信计算（TC）技术的密码管理和单点登录（SSO）访问的方法和装置。 该方法实施了可信计算组（TCG）的可信平台模块（TPM），该平台模块与代理SSO单元和Web访问应用程序进行交互，以提供安全可靠的机制来生成，存储和检索密码和SSO凭据。 本发明的各种实施例允许用户在仅驻留在用户设备上的安全代理器一次登录之后，从属于预先识别的站点组的一个站点到另一站点安全地和透明地跳转。

公开(公告)号：US20070211671A1

公开(公告)日：2007-09-13

申请号：US11684177

申请日：2007-03-09

Applicant: Inhyok Cha

Inventor： Inhyok Cha

IPC: H04B7/216

CPC classification number: H04B7/2637 ,  H04W74/0866

Abstract: A method and apparatus for a flexible physical random access channel (PRACH) preamble are disclosed. A wireless transmit/receive unit (WTRU) transmits a PRACH preamble generated by using a scrambling code and a signature code to a Node B to access the channel. The WTRU incorporates PRACH access information and preamble channel resources into the preamble, thereby providing flexibility and efficiency in transmission of the PRACH preamble. The method and apparatus may also be applied to an acquisition indicator channel preamble, a high speed uplink packet access channel preamble, an orthogonal frequency division multiplexing preamble, or an orthogonal frequency division multiple access preamble.

Abstract translation: 公开了一种用于灵活物理随机接入信道（PRACH）前导码的方法和装置。 无线发射/接收单元（WTRU）通过使用扰码和签名码将节点B发送的PRACH前导码发送到节点B以访问该信道。 WTRU将PRACH接入信息和前导信道资源合并到前导码中，从而提供PRACH前导码的传输中的灵活性和效率。 该方法和装置还可以应用于采集指示符信道前导码，高速上行链路分组接入信道前导码，正交频分复用前导码或正交频分多址前同步码。

公开(公告)号：US07200376B2

公开(公告)日：2007-04-03

申请号：US11080039

申请日：2005-03-15

Applicant: Inhyok Cha ,  Zheng Zhao ,  Thomas Eric Gorsuch ,  Ross L. Lintelman

Inventor： Inhyok Cha ,  Zheng Zhao ,  Thomas Eric Gorsuch ,  Ross L. Lintelman

IPC: H04B1/06

CPC classification number: H04B7/0617 ,  H04B7/0408 ,  H04B7/0695 ,  Y02D70/142 ,  Y02D70/20 ,  Y02D70/444

Abstract: A smart antenna steering algorithm operates in response to different functions monitored by the media access control (MAC) layer within a client station. One function is when the MAC layer indicates that the client station has been placed in a power savings mode. In response, the antenna algorithm stores an index of the currently selected antenna. Another function is when the MAC layer indicates that the client station has not been synchronized, associated and authenticated with an access point. In response, the algorithm selects an omni-directional antenna beam as the default antenna beam. Another function is when the MAC layer provides beacon period synchronization information to the antenna steering algorithm so that the algorithm can update its own timer.

Abstract translation: 智能天线导向算法响应于由客户站内的媒体访问控制（MAC）层监视的不同功能而工作。 一个功能是当MAC层指示客户端站已经处于省电模式时。 作为响应，天线算法存储当前选择的天线的索引。 另一个功能是当MAC层指示客户端站未被同步，与接入点关联和认证时。 作为响应，该算法选择全向天线波束作为默认天线波束。 另一个功能是当MAC层向天线导向算法提供信标周期同步信息时，算法可以更新自己的定时器。

公开(公告)号：US20060270343A1

公开(公告)日：2006-11-30

申请号：US11400400

申请日：2006-04-06

Applicant: Inhyok Cha ,  Eldad Zeira ,  Keith Baldwin

Inventor： Inhyok Cha ,  Eldad Zeira ,  Keith Baldwin

IPC: H04B7/14

CPC classification number: H04B7/0413 ,  H04B7/0695 ,  H04B7/088

Abstract: A method and apparatus for selecting an antenna mapping in multiple-in/multiple-out (MIMO) enabled wireless communication networks. A candidate set of currently available antenna mappings is determined based upon measured long term channel conditions. An antenna mapping is selected from the candidate set, and the mapping is calibrated with a selected antenna mapping of a receiving wireless transmit/receive unit (WTRU). When the selected mappings are calibrated, packet data transmission begins. In an alternative embodiment, a calibration training frame (CTF) is used to calibrate multiple antenna mappings simultaneously or sequentially. Also disclosed are physical layer and medium access control layer frame formats for implementing antenna mapping selection according to the invention.

公开(公告)号：US20060057964A1

公开(公告)日：2006-03-16

申请号：US11018794

申请日：2004-12-21

Applicant: Vincent Roy ,  Paul Marinier ,  Arty Chandra ,  Inhyok Cha

Inventor： Vincent Roy ,  Paul Marinier ,  Arty Chandra ,  Inhyok Cha

IPC: H04B17/00

CPC classification number: H04B7/0408 ,  H04W16/28

Abstract: A method for implementing a smart antenna in establishing association between a station (STA) and an access point (AP) in a wireless local area network begins by transmitting a beacon frame by the AP on one antenna beam. The beacon frame is received at the STA, which measures the signal quality of the beacon frame. The AP switches to a different antenna beam and repeats the method until the beacon frame has been transmitted on all antenna beams. The STA associates to the AP that transmits the beacon frame with the highest signal quality on one of its antenna beams. A similar method may be used in which the STA sends a probe request frame to the AP, which then responds with probe response frames sent on multiple antenna beams.

Abstract translation: 在无线局域网中建立站（STA）和接入点（AP）之间的关联的实现智能天线的方法是通过一个天线波束上的AP发送信标帧开始的。 在STA处接收信标帧，其测量信标帧的信号质量。 AP切换到不同的天线波束并重复该方法，直到在所有天线波束上发送信标帧为止。 STA将AP与其一个天线波束上发送具有最高信号质量的信标帧相关联。 可以使用类似的方法，其中STA向AP发送探测请求帧，该AP然后在多个天线波束上发送的探测响应帧进行响应。

公开(公告)号：US20050285803A1

公开(公告)日：2005-12-29

申请号：US11144113

申请日：2005-06-03

Applicant: Ana Iacono ,  Arty Chandra ,  Daniel Steinbach ,  Inhyok Cha ,  James Otto ,  Kevin Johnson ,  Stanley Gutowski ,  Kai Liu ,  Angelo Cuffaro ,  Janet Stern-Berkowitz

Inventor： Ana Iacono ,  Arty Chandra ,  Daniel Steinbach ,  Inhyok Cha ,  James Otto ,  Kevin Johnson ,  Stanley Gutowski ,  Kai Liu ,  Angelo Cuffaro ,  Janet Stern-Berkowitz

IPC: H04W16/24 ,  H04Q7/00

CPC classification number: H04W16/24 ,  H04B7/0695 ,  H04B7/088

Abstract: An access point operates in an 802.11 wireless communication network communicating with a client station, and includes a smart antenna for generating directional antenna beams and an omni-directional antenna beam. An antenna steering algorithm scans the directional antenna beams and the omni-directional antenna beam for receiving signals from the client station. The signals received via each scanned antenna beam are measured, and one of the antenna beams is selected based upon the measuring for communicating with the client station. The selected antenna beam is preferably a directional antenna beam. Once the directional antenna beam has been selected, there are several usage rules for exchanging data with the client station. The usage rules are directed to an active state of the access point, which includes a data transmission mode and a data reception mode.

Abstract translation: 接入点在与客户站通信的802.11无线通信网络中操作，并且包括用于生成定向天线波束的智能天线和全向天线波束。 天线导向算法扫描定向天线波束和全向天线波束，用于从客户端接收信号。 测量经由每个扫描天线波束接收到的信号，并且基于与客户站进行通信的测量来选择天线波束之一。 所选择的天线波束优选地是定向天线波束。 一旦选择了定向天线波束，就有几种与客户端交换数据的使用规则。 使用规则被引导到接入点的活动状态，其包括数据传输模式和数据接收模式。

公开(公告)号：US20050215262A1

公开(公告)日：2005-09-29

申请号：US11080317

申请日：2005-03-15

Applicant: Inhyok Cha ,  Zheng Zhao ,  Thomas Gorsuch ,  Ross Lintelman

Inventor： Inhyok Cha ,  Zheng Zhao ,  Thomas Gorsuch ,  Ross Lintelman

IPC: H01Q3/22 ,  H04B1/06 ,  H04B7/04 ,  H04B7/06 ,  H04L12/28 ,  H04W16/28 ,  H04W84/12 ,  H04Q7/20

CPC classification number: H04B7/0408 ,  H04B7/0695 ,  H04W16/28 ,  H04W84/12 ,  Y02D70/14

Abstract: A smart antenna steering algorithm performs a periodic re-scan at an end of a sustained use period and before a next sustained use period. During a sustained use period, a re-scan of the other antenna beams is not performed. The periodic re-scan is performed on alternate antenna beams that were selected when the preferred antenna beam was selected. The steering algorithm monitors a quality metric of the alternate antenna beams as well as a quality metric for the preferred antenna beam. If the quality metric of the preferred antenna beam is less than the quality metrics of anyone of the alternate antenna beams, then the alternate antenna beam corresponding to the quality metric having a higher value is selected for the next sustained use period.

Abstract translation: 智能天线转向算法在持续使用期结束时和在下一个持续使用期之前执行周期性的重新扫描。 在持续使用期间，不执行其他天线波束的重新扫描。 在选择优选天线波束时选择的备用天线波束执行周期性重新扫描。 转向算法监视替代天线波束的质量度量以及优选天线波束的质量度量。 如果优选天线波束的质量度量小于任何替代天线波束的质量度量，则选择对应于具有较高值的​​质量度量的替代天线波束用于下一个持续使用周期。

公开(公告)号：US20050215261A1

公开(公告)日：2005-09-29

申请号：US11080297

申请日：2005-03-15

Applicant: Inhyok Cha ,  Zheng Zhao ,  Thomas Gorsuch ,  Ross Lintelman

Inventor： Inhyok Cha ,  Zheng Zhao ,  Thomas Gorsuch ,  Ross Lintelman

IPC: H01Q3/22 ,  H04B1/06 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04L12/28 ,  H04W16/28 ,  H04W84/12 ,  H04Q7/20

CPC classification number: H04B7/0408 ,  H04B7/0617 ,  H04B7/0695 ,  H04B7/086 ,  H04W16/28 ,  H04W84/12 ,  Y02D70/14

Abstract: A smart antenna steering algorithm performs a self-monitored re-scan during a sustained use period after having selected a preferred antenna beam. During a sustained use period, a re-scan of the other antenna beams is not performed. The steering algorithm periodically monitors a quality metric of the ongoing radio link provided by the preferred antenna beam. The quality metric is based upon a signal quality metric and a link quality metric. If the quality metric drops below certain thresholds during the sustained use period, the steering algorithm either swaps the preferred antenna beam with an alternate antenna beam or initiates a re-scan of the available antenna beams for selecting a new preferred antenna beam.

Abstract translation: 智能天线导向算法在选择优选的天线波束之后在持续使用期间执行自我监测的重新扫描。 在持续使用期间，不执行其他天线波束的重新扫描。 导向算法周期性地监视由优选天线波束提供的正在进行的无线电链路的质量度量。 质量度量基于信号质量度量和链路质量度量。 如果在持续使用期间质量度量下降到特定阈值以下，则导向算法或者用替代天线波束交换优选的天线波束，或者启动用于选择新的优选天线波束的可用天线波束的重新扫描。

公开(公告)号：US09807608B2

公开(公告)日：2017-10-31

申请号：US12763827

申请日：2010-04-20

Applicant: Inhyok Cha ,  Louis J. Guccione ,  Yogendra C. Shah ,  Andreas U. Schmidt ,  Sudhir B. Pattar

Inventor： Inhyok Cha ,  Louis J. Guccione ,  Yogendra C. Shah ,  Andreas U. Schmidt ,  Sudhir B. Pattar

IPC: H04W12/06 ,  H04W12/04 ,  H04L29/06

CPC classification number: H04W12/06 ,  H04L63/20 ,  H04W12/04

Abstract: Methods and instrumentalities are disclosed that enable one or more domains on one or more devices to be owned or controlled by one or more different local or remote owners, while providing a level of system-wide management of those domains. Each domain may have a different owner, and each owner may specify policies for operation of its domain and for operation of its domain in relation to the platform on which the domain resides, and other domains. A system-wide domain manager may be resident on one of the domains. The system-wide domain manager may enforce the policies of the domain on which it is resident, and it may coordinate the enforcement of the other domains by their respective policies in relation to the domain in which the system-wide domain manager resides. Additionally, the system-wide domain manager may coordinate interaction among the other domains in accordance with their respective policies.