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    • 51. 发明申请
    • Adaptive Beamforming Configuration Methods And Apparatus For Wireless Access Points Serving As Handoff Indication Mechanisms In Wireless Local Area Networks
    • 作为无线局域网中切换指示机制的无线接入点的自适应波束成形配置方法和装置
    • US20100135184A1
    • 2010-06-03
    • US12700118
    • 2010-02-04
    • Vytautas Robertas Kezys
    • Vytautas Robertas Kezys
    • H04W36/00H04L12/26
    • H04W24/02H04W16/18H04W28/08H04W36/0083
    • In one illustrative example, a wireless access point of a wireless local area network (WLAN) includes an antenna array, a wireless transceiver array coupled to the antenna array, and one or more processors which are coupled to the wireless transceiver array. The one or more processors are adapted to operate the wireless access point in a configuration mode and a handoff indication mode. In the configuration mode, the one or more processors are adapted to operate the wireless access point to receive, via the wireless transceiver array, RF signals from one or more communication devices and determine and set wireless transceiver parameters for adjusting boundaries of an RF coverage region of the wireless access point based on these RF signals. In the handoff indication mode, the one or more processors set the wireless access point with the adjusted RF coverage region (adjusted from the configuration mode), where handoff indications are communicated in response to mobile devices leaving the WLAN coverage region through the adjusted RF coverage region for handoff to a wireless wide area network (WWAN).
    • 在一个说明性示例中,无线局域网(WLAN)的无线接入点包括天线阵列,耦合到天线阵列的无线收发器阵列以及耦合到无线收发器阵列的一个或多个处理器。 一个或多个处理器适于在配置模式和切换指示模式下操作无线接入点。 在配置模式中,一个或多个处理器适于操作无线接入点以经由无线收发器阵列从一个或多个通信设备接收RF信号,并且确定和设置用于调整RF覆盖区域的边界的无线收发器参数 基于这些RF信号的无线接入点。 在切换指示模式中,一个或多个处理器设置具有经调整的RF覆盖区域(从配置模式调整)的无线接入点,其中响应于离开WLAN覆盖区域经过调整的RF覆盖的移动设备来传送切换指示 用于切换到无线广域网(WWAN)的区域。
    • 52. 发明授权
    • Adaptive beamforming configuration methods and apparatus for wireless access points serving as handoff indication mechanisms in wireless local area networks
    • 用于无线接入点的自适应波束成形配置方法和装置用作无线局域网中的切换指示机制
    • US07684370B2
    • 2010-03-23
    • US11743741
    • 2007-05-03
    • Vytautas Robertas Kezys
    • Vytautas Robertas Kezys
    • H04W4/00
    • H04W24/02H04W16/18H04W28/08H04W36/0083
    • Methods and apparatus for use in configuring a wireless access point (AP) which serves as a handoff indication mechanism (“AP tripwire”) in a wireless local area network (WLAN) for mobile device handoffs between the WLAN and a wireless wide area network (WWAN) are described. During a configuration procedure or training mode of operation of the wireless AP, radio frequency (RF) signals transmitted from a plurality of communication devices are received at the wireless AP. The plurality of communication devices include a first group of communication devices positioned at locations of undesired RF coverage of the wireless AP, outside of an RF coverage boundary of a WLAN coverage region of one or more other wireless APs of the WLAN. The plurality of communication devices also include a second group of communication devices positioned at locations of desired RF coverage of the wireless AP, around the RF coverage boundary of the WLAN coverage region and within the WWAN coverage region. Wireless transceiver parameters of the wireless AP are automatically determined and set to adjust boundaries of an RF coverage region, such that RF signal coverage of the first group of communication devices is minimized but RF signal coverage of the second group of communication devices is maximized. Preferably, the parameters of the wireless transceiver are determined through use of an adaptive beamforming technique (e.g. a minimax optimization) which is performed automatically by the wireless AP without user intervention. After the configuration procedure, the wireless AP operates with use of the configured wireless transceiver parameters in a normal, steady-state mode of operation as the AP tripwire of the WLAN.
    • 用于配置无线接入点(AP)的方法和装置,所述无线接入点(AP)用作WLAN和无线广域网之间的移动设备切换的无线局域网(WLAN)中的切换指示机制(“AP tripwire”) WWAN)。 在无线AP的配置过程或训练操作模式期间,在无线AP处接收从多个通信设备发送的射频(RF)信号。 多个通信设备包括位于无线AP的不期望的RF覆盖的位置处的第一组通信设备,其位于WLAN的一个或多个其他无线AP的WLAN覆盖区域的RF覆盖边界之外。 多个通信设备还包括位于无线AP的期望RF覆盖的位置处的第二组通信设备,围绕WLAN覆盖区域的RF覆盖边界并且在WWAN覆盖区域内。 自动确定和设置无线AP的无线收发器参数以调整RF覆盖区域的边界,使得第一组通信设备的RF信号覆盖被最小化,而使第二组通信设备的RF信号覆盖最大化。 优选地,通过使用无线AP自动执行的自适应波束形成技术(例如最小最优化优化)来确定无线收发器的参数,而无需用户干预。 在配置过程之后,无线AP利用配置的无线收发器参数以正常的稳态运行模式操作,作为WLAN的AP绊线。
    • 55. 发明授权
    • Method and system for predicting service drop in a wireless network
    • 用于预测无线网络中服务丢弃的方法和系统
    • US08700061B2
    • 2014-04-15
    • US13617821
    • 2012-09-14
    • Sherif Abdel-KaderVytautas Robertas Kezys
    • Sherif Abdel-KaderVytautas Robertas Kezys
    • H04W24/00
    • H04W4/02H04W64/00H04W68/00H04W76/30
    • A mobile wireless device for use in a wireless network, wherein the wireless network includes regular access points and border access points. The border access points are those access points situated at the edge of the campus or other physical facility associated with the wireless network and they define the edge of the coverage area of the wireless network. The mobile wireless device predicts a possible drop of an active service due to loss of coverage by recognizing when it has connected with a border access point. A warning is output to the user of the mobile wireless device. The mobile wireless device may further recognize if it is located on the exterior side of the border access point away from the interior of the wireless network.
    • 一种用于无线网络的移动无线设备,其中所述无线网络包括常规接入点和边界接入点。 边界接入点是位于校园边缘或与无线网络相关联的其他物理设施的那些接入点,并且它们定义了无线网络的覆盖区域的边缘。 移动无线设备通过识别何时连接到边界接入点来预测由于丢失覆盖而导致的活动服务的可能下降。 向移动无线设备的用户输出警告。 移动无线设备还可以识别其是否位于远离无线网络内部的边界接入点的外侧。
    • 56. 发明授权
    • Method and system for adjusting WLAN radio receiver gain in a wireless device
    • 在无线设备中调整WLAN无线电接收机增益的方法和系统
    • US08571595B2
    • 2013-10-29
    • US13081712
    • 2011-04-07
    • Mohammed Nawaf SmadiVytautas Robertas Kezys
    • Mohammed Nawaf SmadiVytautas Robertas Kezys
    • H04B7/00H04B3/46H04B17/00H04B7/185H04Q1/20
    • H04W52/52H03G3/3052
    • A method for adjusting a gain level for a receiver of a first radio simultaneously operational with a transmitter of a second radio, comprising: determining a signal-to-noise ratio (“SNR”) value for signals received by the receiver from an access point (“AP”); and, when the first radio is associated with the AP and the transmitter is not transmitting, if the SNR value exceeds a SNR threshold, reducing the gain level for the receiver from an initial level and initiating transmission from the transmitter, otherwise maintaining the gain level for the receiver at the initial level and initiating transmission from the transmitter; wherein the SNR threshold is a SNR value above which beacon signals from the AP can be successfully received by the receiver.
    • 一种用于调整与第二无线电的发射机同时操作的第一无线电接收机的增益电平的方法,包括:确定接收机从接入点接收的信号的信噪比(“SNR”)值 (“AP”); 并且当第一无线电与AP关联并且发射机不发射时,如果SNR值超过SNR阈值,则将接收机的增益电平从初始电平降低并且发起来自发射机的传输,否则保持增益电平 对于初始级别的接收机并且发起从发射机的传输; 其中所述SNR阈值是SNR值,在所述SNR值之上,来自所述AP的信标信号可由所述接收机成功接收。