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    • 3. 发明授权
    • System and method for measuring and displaying presence of wireless local area network devices
    • 用于测量和显示无线局域网设备存在的系统和方法
    • US08625441B2
    • 2014-01-07
    • US12850523
    • 2010-08-04
    • John Paul HittelPeter OakleyOlivier Calle
    • John Paul HittelPeter OakleyOlivier Calle
    • H04L12/26
    • H04W24/08H04W88/02
    • An instrument is disclosed that is capable of detecting and graphically displaying channel usage and the number of access points operating on each channel of interest. By using a module that counts the number of elapsed clock cycles, the total cumulative duration of detected frames, and the number of channel in-use cycles, the instrument can determine the percentage of time a channel is in use, the percentage of time of IEEE 802.11 usage on a channel, and the percentage of time of non-IEEE 802.11 usage on a channel. Further, channels are scanned for access point activity using a scanning algorithm that interleaves scanning channels at a first duration longer than the beacon interval and scanning channels at a second shorter duration.
    • 公开了一种能够检测和图形地显示在感兴趣的每个通道上操作的通道使用和接入点的数量的仪器。 通过使用对经过的时钟周期数,累计检测帧累积持续时间和通道使用次数的模块进行计数,仪器可以确定通道使用时间的百分比, 信道上的IEEE 802.11使用率以及信道上非IEEE 802.11使用时间的百分比。 此外,使用扫描算法扫描频道以进行接入点活动,所述扫描算法在比信标间隔长的第一持续时间交织扫描信道,并以第二较短的持续时间扫描信道。
    • 6. 发明授权
    • Jointed optical fibers
    • 接合光纤
    • US06336749B1
    • 2002-01-08
    • US09433379
    • 1999-11-03
    • Eamonn O'TooleTimothy DavernMichael CrowleyConleth Denis HusseyPaul F. O'SullivanKenneth Peter OakleyElaine O'Brien
    • Eamonn O'TooleTimothy DavernMichael CrowleyConleth Denis HusseyPaul F. O'SullivanKenneth Peter OakleyElaine O'Brien
    • G02B6255
    • G02B6/2551
    • A method for making an optical fiber fusion joint between two dissimilar single mode optical fibers (10,40) where the fibers have different core sizes and/or different refractive index profiles due to different patterns of dopant. One fiber may be a standard step-index communication fiber with a 9 &mgr;m core diameter and a numerical aperture (NA) of about 0.1, and the second fiber may be a dispersion compensating fiber (DCF) with a multiple layer refractive index profile. The second fiber alternatively may have a smaller core and a higher NA, up to about 0.3. A diffused dopant region, with a gradual longitudinal variation in diffusion, is included adjacent to the splice. The diameter of the communications fiber core increases gradually within the diffusion region as the splice joint is approached along this fiber. The diffusion of the various dopants in the second fiber tend to cause its refractive index profile to converge optically to that of the diffused step index communication fiber. As a consequence of the gradually varying diffusion region, the optical losses associated with the splice are relatively low, even when there is relatively high mismatch between the mode field diameters and mode field shapes (at a signal wavelength) in the respective fibers. In another embodiment a fiber fattening technique is used to fatten the fibers in the region of the splice to reduce losses.
    • 一种用于在两种不同单模光纤(10,40)之间制造光纤熔接的方法,其中由于掺杂剂的不同图案,纤维具有不同的芯尺寸和/或不同的折射率分布。 一根纤维可以是具有9μm芯直径和约0.1的数值孔径(NA)的标准步进折射率通信光纤,并且第二光纤可以是具有多层折射率分布的色散补偿光纤(DCF)。 第二纤维可以具有更小的芯和更高的NA,高达约0.3。 扩散掺杂区域,具有逐渐的扩散的纵向变化,包括在接头附近。 当沿着该光纤接合接头接头时,通信光纤芯的直径在扩散区域内逐渐增加。 各种掺杂剂在第二纤维中的扩散倾向于使其折射率分布与光扩散阶跃折射率通信光纤的折射率分布光学收敛。 作为逐渐变化的扩散区域的结果,即使在各个光纤中的模场直径和模场形状(信号波长)之间存在相对高的失配,与熔接相关联的光损耗也相对较低。 在另一个实施方案中,纤维育肥技术用于在接合区域中对纤维进行加脂以减少损失。