会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 1. 发明申请
    • DETECTING, REPORTING AND MITIGATING HIDDEN STATIONS IN A WIRELESS DATA NETWORK
    • 检测,报告和减轻无线数据网络中的隐蔽站
    • US20070115907A1
    • 2007-05-24
    • US11623960
    • 2007-01-17
    • Andrew MylesAlex LamDavid Goodall
    • Andrew MylesAlex LamDavid Goodall
    • H04L12/56
    • H04W16/14H04W52/34H04W74/00H04W84/12
    • A method for automatic hidden node detection that includes observing frame exchange sequences that conform to a MAC standard such as the IEEE 802.11 standard. The method includes detecting a hidden node upon receiving a response frame without previously receiving the frame causing the response. Similar conclusions may be drawn from longer frame sequences. When a hidden node has been detected with reasonable certainty, a hidden node report is sent to a hidden node manager. In one embodiment, the hidden node manager is centralized, and in another, the management function is performed in a distributed manner. Upon receiving a report, the hidden node manager automatically invokes hidden node avoidance measures by sending one or more action frames. In another embodiment, the hidden node manager turns on a hidden node mitigation method. In the case of the IEEE 802.11 standard, the hidden node manager turns on the IEEE 802.11 hidden node mitigation method based on RTS/CTS exchange.
    • 一种用于自动隐藏节点检测的方法,包括观察符合诸如IEEE 802.11标准的MAC标准的帧交换序列。 该方法包括在接收到响应帧时检测隐藏节点,而不事先接收到引起响应的帧。 从较长的帧序列可以得出类似的结论。 当合理确定的情况下检测到隐藏节点时,会将隐藏节点报告发送给隐藏节点管理器。 在一个实施例中,隐藏节点管理器是集中式的,而另一个实施例中,分布式地执行管理功能。 收到报告后,隐藏节点管理器通过发送一个或多个动作帧自动调用隐藏的节点回避措施。 在另一个实施例中,隐藏节点管理器启用隐藏节点缓解方法。 在IEEE 802.11标准的情况下,隐藏节点管理器基于RTS / CTS交换机来打开IEEE 802.11隐藏节点缓解方法。
    • 3. 发明申请
    • METHOD AND APPARATUS FOR CLOCK SYNCHRONIZATION IN A WIRELESS NETWORK
    • 无线网络中时钟同步的方法与装置
    • US20070091934A1
    • 2007-04-26
    • US11557588
    • 2006-11-08
    • Andrew MylesDavid GoodallAlex Lam
    • Andrew MylesDavid GoodallAlex Lam
    • H04J3/06
    • H04W56/009H04J3/0664H04J3/0697H04L7/08
    • A method and apparatus for synchronizing a local clock value in a wireless receiver receiving a data unit containing synchronization information. The method includes receiving a first data unit containing synchronization information, extracting the synchronization information from the received first data unit, copying a local free-running clock at a known reference point in time relative to the time the first data unit was received to generate a local timestamp; and calculating an offset to the free-running clock using the extracted synchronization information and the local timestamp, the calculating in non real-time, such that the sum of the calculated offset and the value of the free-running clock provides a local clock value that is approximately synchronized in time. The apparatus implementing the method is part of a node of a wireless station, and provides a time synchronization function, typically at the MAC layer.
    • 一种在接收包含同步信息的数据单元的无线接收机中同步本地时钟值的方法和装置。 该方法包括接收包含同步信息的第一数据单元,从接收到的第一数据单元提取同步信息,在相对于接收到第一数据单元的时间的已知参考点处复制本地自由运行时钟,以生成 本地时间戳 以及使用提取的同步信息和本地时间戳来计算到自由运行时钟的偏移量,非实时计算,使得所计算的偏移和自由运行时钟的值的和提供本地时钟值 这在时间上大致同步。 实现该方法的装置是无线站的节点的一部分,并且通常在MAC层提供时间同步功能。
    • 7. 发明申请
    • VISCOSITY MEASUREMENT APPARATUS AND METHOD
    • 粘度测量装置和方法
    • US20130186184A1
    • 2013-07-25
    • US13877978
    • 2011-10-05
    • David Goodall
    • David Goodall
    • G01N11/06
    • G01N11/06G01N11/04G01N21/33
    • A method and apparatus for measuring the viscosity of a sample solution. A capillary (2) having first and second spaced apart detection windows (W1,W2) is filled with a carrier solution. A plug (4) or a continuous volume (4) of a sample solution is injected into the first end of the capillary (2) and pumped through the capillary (2) at a first pump pressure passing through the first and second detection windows (W1,W2). At least part of each detection window (W1,W2) is illuminated with a light source. Light from the light source passing through the carrier solution or the sample solution at each detector window (W1,W2) is detected using an array detector (6) comprising a two dimensional array of detector locations which generates an array detector output signal indicative of the profile of light absorbance of the sample solution plug (4) or flow front (4) passing through each detection window (W1,W2). From this the time difference between the time of detection of the sample solution plug (4) or flow front (4) at each detection window (W1,W2) is determined allowing the specific viscosity ηsp of the sample solution to be calculated taking into account a known time difference between the time of detection at each detection window (W1,W2) for a plug (4) or flow front (4) of a reference sample solution whose viscosity is approximately equal to the viscosity of the carrier solution when pumped at the first pump pressure.
    • 用于测量样品溶液的粘度的方法和装置。 具有第一和第二间隔开的检测窗口(W1,W2)的毛细管(2)填充有载体溶液。 将样品溶液的塞子(4)或连续体积(4)注入到毛细管(2)的第一端中,并以通过第一和第二检测窗口的第一泵压力泵送通过毛细管(2) W1,W2)。 每个检测窗口(W1,W2)的至少一部分被光源照射。 使用包括检测器位置的二维阵列的阵列检测器(6)来检测来自在每个检测器窗口(W1,W2)处穿过载体溶液或样品溶液的光源的光,其生成阵列检测器输出信号, 通过每个检测窗口(W1,W2)的样品溶液塞(4)或流动前部(4)的吸光度曲线。 由此,确定在每个检测窗口(W1,W2)处的样品溶液塞(4)或流动前端(4)的检测时间之间的时间差,从而考虑到考虑样品溶液的比粘度 在针对插塞(4)的每个检测窗口(W1,W2)处的检测时间或参考样品溶液的流动前沿(4)之间的已知时间差,其粘度近似等于在泵送时的载体溶液的粘度 第一泵压力。