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    • 83. 发明授权
    • Synchronizing wireless local area network access points
    • 同步无线局域网接入点
    • US08077614B2
    • 2011-12-13
    • US11999302
    • 2007-12-05
    • Lusheng JiRobert MillerHarry Worstell
    • Lusheng JiRobert MillerHarry Worstell
    • H04J1/16
    • H04J3/06H04J3/0664H04W56/00H04W74/006H04W74/02H04W84/12
    • In a wireless local area network, a first and second access point in which the RF coverage areas overlap are synchronized by positioning a monitor station within the overlap area. The monitor station receives beacon frames from both access points and records the arrival times. A manager in communication with both access points and the monitor station calculates a retardation interval and issues a control command to the second access point to retard transmission of its beacon frame. The retardation interval is calculated such that the contention-free period of the second access point does not overlap the contention-free period of the first access point. The manager may also issue control commands to the first and second access points to adjust their contention-free periods.
    • 在无线局域网中,其中RF覆盖区重叠的第一和第二接入点通过将监视站定位在重叠区域内来同步。 监控站从两个接入点接收信标帧并记录到达时间。 与两个接入点和监控站通信的管理器计算延迟间隔,并向第二接入点发出控制命令以延迟其信标帧的传输。 计算延迟间隔,使得第二接入点的无竞争时段不与第一接入点的无竞争时段重叠。 经理还可以向第一和第二接入点发出控制命令,以调整其无竞争时段。
    • 90. 发明申请
    • LAYOUT METHOD
    • 布局方法
    • US20100123892A1
    • 2010-05-20
    • US12274876
    • 2008-11-20
    • Robert MillerLawrence Smith
    • Robert MillerLawrence Smith
    • G01C3/08
    • G01C15/002
    • The location of one of a series of construction points at an indoor construction site is established using a robotic total station and a handheld device. Construction data is inputted into the handheld device with the construction data defining a plurality of construction points at the construction site. One of the plurality of construction points is selected with the handheld device. Data regarding the selected construction point is then transmitted wirelessly from the handheld device to a robotic total station. The robotic total station generates a beam of laser light, and directs the beam of laser light from the robotic total station to the construction point. The construction point is defined by x and y coordinates, and by an assumed z coordinate. The actual z coordinate is that of a point on a horizontal surface, such as a ceiling or floor, having the same x and y coordinates. Through an iterative process, the location of the construction point is established.
    • 使用机器人全站仪和手持设备建立室内施工现场一系列施工点之一的位置。 施工数据输入到手持装置中,施工数据在施工现场定义了多个施工点。 用手持设备选择多个施工点中的一个。 然后,从手持设备向机器人全站仪无线地传送关于所选择的构造点的数据。 机器人全站仪产生一束激光,并将来自机器人全站仪的激光束引导到施工点。 施工点由x和y坐标以及假定的z坐标定义。 实际的z坐标是具有相同x和y坐标的水平表面上的点,例如天花板或地板。 通过迭代过程,建立施工点的位置。