公开(公告)号：US20060073850A1

公开(公告)日：2006-04-06

申请号：US11024290

申请日：2004-12-28

申请人： Inhyok Cha ,  Ross Lintelman ,  Yingxue Li

发明人： Inhyok Cha ,  Ross Lintelman ,  Yingxue Li

IPC分类号： H04M1/00

CPC分类号： H04B7/0608 ,  H04W16/28 ,  H04W84/12

摘要： A method for steering a smart antenna in a wireless communication system begins by selecting a beam steering criterion. The antenna is switched to one of a plurality of measurement positions and link quality metrics are measured at each measurement position. The steering criterion are optimized based on the measured metrics, and the antenna is steered to the position providing the optimized metrics.

摘要翻译： 用于在无线通信系统中指导智能天线的方法通过选择波束转向标准开始。 天线切换到多个测量位置之一，并且在每个测量位置测量链路质量度量。 转向标准基于测量的度量进行优化，天线被引导到提供优化度量的位置。

公开(公告)号：US20050221838A1

公开(公告)日：2005-10-06

申请号：US11080039

申请日：2005-03-15

申请人： Inhyok Cha ,  Zheng Zhao ,  Thomas Gorsuch ,  Ross Lintelman

发明人： Inhyok Cha ,  Zheng Zhao ,  Thomas Gorsuch ,  Ross Lintelman

IPC分类号： H01Q3/00 ,  H04B1/06 ,  H04B7/04 ,  H04B7/06

CPC分类号： H04B7/0617 ,  H04B7/0408 ,  H04B7/0695 ,  Y02D70/142 ,  Y02D70/20 ,  Y02D70/444

摘要： 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.

摘要翻译： 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：US20050215262A1

公开(公告)日：2005-09-29

申请号：US11080317

申请日：2005-03-15

申请人： Inhyok Cha ,  Zheng Zhao ,  Thomas Gorsuch ,  Ross Lintelman

发明人： Inhyok Cha ,  Zheng Zhao ,  Thomas Gorsuch ,  Ross Lintelman

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

CPC分类号： H04B7/0408 ,  H04B7/0695 ,  H04W16/28 ,  H04W84/12 ,  Y02D70/14

摘要： 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.

摘要翻译： 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

申请人： Inhyok Cha ,  Zheng Zhao ,  Thomas Gorsuch ,  Ross Lintelman

发明人： Inhyok Cha ,  Zheng Zhao ,  Thomas Gorsuch ,  Ross Lintelman

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

CPC分类号： H04B7/0408 ,  H04B7/0617 ,  H04B7/0695 ,  H04B7/086 ,  H04W16/28 ,  H04W84/12 ,  Y02D70/14

摘要： 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.

摘要翻译： 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：US20050221837A1

公开(公告)日：2005-10-06

申请号：US11080038

申请日：2005-03-15

申请人： Inhyok Cha ,  Zheng Zhao ,  Thomas Gorsuch ,  Ross Lintelman

发明人： Inhyok Cha ,  Zheng Zhao ,  Thomas Gorsuch ,  Ross Lintelman

IPC分类号： H01Q3/02 ,  H04B1/06 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08

CPC分类号： H04B7/0408 ,  H04B7/0617 ,  H04B7/086 ,  Y02D70/14

摘要： An antenna steering algorithm for a smart antenna uses signal quality metrics and link quality metrics for selecting a preferred antenna beam. The link quality metrics supplement the signal quality metrics for improving the antenna steering decision. The link quality metrics are based on information available from existing counters operating in the media access control (MAC) layer. Separate estimates of the frame error rates in the receive links and in the transmit links are obtained. One estimate is the downlink quality metric (DLQM) and another estimate is the uplink quality metric (ULQM). Alternative link quality metrics are based on throughput and data rates of the exchanged data.

摘要翻译： 用于智能天线的天线导向算法使用信号质量度量和链路质量度量来选择优选的天线波束。 链路质量度量补充信号质量度量以改善天线导向决策。 链路质量度量基于在媒体访问控制（MAC）层中操作的现有计数器可用的信息。 获得接收链路和发送链路中帧错误率的单独估计。 一个估计是下行链路质量度量（DLQM），另一个估计是上行链路质量度量（ULQM）。 备用链路质量度量是基于交换数据的吞吐量和数据速率。

公开(公告)号：US08675617B2

公开(公告)日：2014-03-18

申请号：US11753115

申请日：2007-05-24

申请人： Inhyok Cha ,  Keith Baldwin ,  Yingxue Li

发明人： Inhyok Cha ,  Keith Baldwin ,  Yingxue Li

IPC分类号： H04W4/00

CPC分类号： H01Q3/2611 ,  H04L1/1887 ,  H04W84/12 ,  H04W88/02

摘要： A client station in a wireless local area network (WLAN) communication system includes a beam commutation algorithm and a smart antenna responsive to the beam commutation algorithm for selecting one of a plurality of directional antenna beams. The smart antenna is configured as a virtual omni-directional antenna by using a commutation of switched directional antenna beams. A switched directional antenna system that performs a commutation sequencing can be blind to environmental conditions and changes.

摘要翻译： 无线局域网（WLAN）通信系统中的客户站包括波束换向算法和响应于波束换向算法的智能天线，用于选择多个定向天线波束中的一个。 通过使用切换的定向天线波束的换向将智能天线配置为虚拟全向天线。 执行换向排序的开关定向天线系统可能对环境条件和变化无视。

公开(公告)号：US20080002627A1

公开(公告)日：2008-01-03

申请号：US11753115

申请日：2007-05-24

申请人： Inhyok Cha ,  Keith Baldwin ,  Yingxue Li

发明人： Inhyok Cha ,  Keith Baldwin ,  Yingxue Li

IPC分类号： H04Q7/00

CPC分类号： H01Q3/2611 ,  H04L1/1887 ,  H04W84/12 ,  H04W88/02

摘要： A client station in a wireless local area network (WLAN) communication system includes a beam commutation algorithm and a smart antenna responsive to the beam commutation algorithm for selecting one of a plurality of directional antenna beams. The smart antenna is configured as a virtual omni-directional antenna by using a commutation of switched directional antenna beams. A switched directional antenna system that performs a commutation sequencing can be blind to environmental conditions and changes.

摘要翻译： 无线局域网（WLAN）通信系统中的客户站包括波束换向算法和响应于波束换向算法的智能天线，用于选择多个定向天线波束中的一个。 通过使用切换的定向天线波束的换向将智能天线配置为虚拟全向天线。 执行换向排序的开关定向天线系统可能对环境条件和变化无视。

公开(公告)号：US20060079220A1

公开(公告)日：2006-04-13

申请号：US11228816

申请日：2005-09-16

申请人： Inhyok Cha ,  Yingxue Li

发明人： Inhyok Cha ,  Yingxue Li

IPC分类号： H04Q7/20

CPC分类号： H04W16/28 ,  H04B7/0695 ,  H04B7/082 ,  H04W76/10 ,  H04W84/12

摘要： A communications device with a switched beam antenna operates in a wireless local area network (WLAN) that includes a plurality of transmitters. The switched beam antenna generates a plurality of antenna beams. A method for operating the communications device includes receiving signals from the plurality of transmitters operating within the WLAN, identifying the received signals comprising medium access control (MAC) information, and determining a quality metric for each received signal comprising MAC information. A transmitter is selected based on the quality metrics. The antenna beams are scanned for receiving from the selected transmitter the signals comprising MAC information. A quality metric associated with each scanned antenna beam is determined. One of the scanned antenna beams is then selected for communicating with the selected transmitter based on the quality metrics.

摘要翻译： 具有切换波束天线的通信设备在包括多个发射机的无线局域网（WLAN）中工作。 切换波束天线产生多个天线波束。 用于操作通信设备的方法包括从在WLAN内操作的多个发射机接收信号，识别包括媒体接入控制（MAC）信息的接收信号，以及确定包括MAC信息的每个接收信号的质量度量。 基于质量度量来选择发射机。 扫描天线波束以从所选发射机接收包括MAC信息的信号。 确定与每个扫描天线波束相关联的质量度量。 然后选择扫描的天线波束之一用于基于质量度量与所选择的发射机进行通信。

公开(公告)号：US07917092B2

公开(公告)日：2011-03-29

申请号：US11302299

申请日：2005-12-13

申请人： Ana Lucia Iacono ,  Arty Chandra ,  Inhyok Cha ,  John S. Chen ,  Yingxue Li ,  James C. Otto

发明人： Ana Lucia Iacono ,  Arty Chandra ,  Inhyok Cha ,  John S. Chen ,  Yingxue Li ,  James C. Otto

IPC分类号： H04B1/00 ,  H04B15/00 ,  H04B17/00 ,  H04M1/00 ,  H04W4/00

CPC分类号： H04B7/0608 ,  H04W16/28 ,  H04W72/046

摘要： An apparatus and a method for improving packet transmission and reducing latency in VoIP over WLAN using switched beam antennas having multiple directional antenna beams are disclosed. In an access point having a switched beam antenna, or other smart antenna system, the present invention extends the coverage area of an access point for authentication and association of a new WTRU, extends the access points coverage area during in session transmissions with a WTRU, and adjusts data rates. The method also controls Contention Period (CP)/Contention Free Period (CFP) timing amongst beams emanating from an access point having a switched beam antenna, or other smart antenna system. Fast diversity switching, frame level switching, lowered data rates, and scanning multiple directional antenna beams for the optimum transmission beam are disclosed to improve beam selection and packet transmission.

摘要翻译： 公开了一种使用具有多个定向天线波束的切换波束天线来改善分组传输并减少VoIP中的VoIP延迟的装置和方法。 在具有切换波束天线或其它智能天线系统的接入点中，本发明扩展用于新WTRU的认证和关联的接入点的覆盖区域，在与WTRU的会话传输期间扩展接入点覆盖区域， 并调整数据速率。 该方法还控制从具有切换波束天线或其他智能天线系统的接入点发出的波束之间的竞争周期（CP）/无竞争周期（CFP）定时。 公开了快速分集切换，帧级切换，降低数据速率和扫描用于最佳传输波束的多方向天线波束，以改善波束选择和分组传输。

公开(公告)号：US20060203789A1

公开(公告)日：2006-09-14

申请号：US11302299

申请日：2005-12-13

申请人： Ana Iacono ,  Arty Chandra ,  Inhyok Cha ,  John Chen ,  Yingxue Li ,  James Otto

发明人： Ana Iacono ,  Arty Chandra ,  Inhyok Cha ,  John Chen ,  Yingxue Li ,  James Otto

IPC分类号： H04Q7/24 ,  H04L12/66

CPC分类号： H04B7/0608 ,  H04W16/28 ,  H04W72/046

摘要： An apparatus and a method for improving packet transmission and reducing latency in VoIP over WLAN using switched beam antennas having multiple directional antenna beams are disclosed. In an access point having a switched beam antenna, or other smart antenna system, the present invention extends the coverage area of an access point for authentication and association of a new WTRU, extends the access points coverage area during in session transmissions with a WTRU, and adjusts data rates. The method also controls Contention Period (CP)/Contention Free Period (CFP) timing amongst beams emanating from an access point having a switched beam antenna, or other smart antenna system. Fast diversity switching, frame level switching, lowered data rates, and scanning multiple directional antenna beams for the optimum transmission beam are disclosed to improve beam selection and packet transmission.

摘要翻译： 公开了一种使用具有多个定向天线波束的切换波束天线来改善分组传输并减少VoIP中的VoIP延迟的装置和方法。 在具有切换波束天线或其它智能天线系统的接入点中，本发明扩展用于新WTRU的认证和关联的接入点的覆盖区域，在与WTRU的会话传输期间扩展接入点覆盖区域， 并调整数据速率。 该方法还控制从具有切换波束天线或其他智能天线系统的接入点发出的波束之间的竞争周期（CP）/无竞争周期（CFP）定时。 公开了快速分集切换，帧级切换，降低数据速率和扫描用于最佳传输波束的多方向天线波束，以改善波束选择和分组传输。