中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

43 records (took 0.016 seconds)

    MAC protocol for multi-channel wireless networks
    1.
    发明授权
    MAC protocol for multi-channel wireless networks 有权
    用于多通道无线网络的MAC协议

    公开(公告)号：US09025578B2

    公开(公告)日：2015-05-05

    申请号：US12937025

    申请日：2009-04-24

    Applicant: Carlos Cordeiro ,  Bong-Jun Ko ,  Kiran Challapali

    Inventor： Carlos Cordeiro ,  Bong-Jun Ko ,  Kiran Challapali

    IPC: H04J3/00 ,  H04W48/10 ,  H04W88/18

    CPC classification number: H04W48/10 ,  H04W88/182

    Abstract: A distributed coordination of a wireless network operating on different channels is provided by dispatching a device on each ‘home’ channel to regularly visit other ‘foreign’ channels to propagate and listen to broadcast information on these channels. The information in the broadcast packets transmitted on the home channel is relayed to the devices on the foreign channels by the dispatched device, as a ‘proxy device’ that operates on behalf of the other devices in the home channel. In a preferred embodiment, various aspects of this proxy process are optimized to reduce overhead and delays. Each channel is configured to distinguish home devices from foreign devices, to avoid contention between home and foreign devices. Acquired beacon slots on foreign channels are reserved to facilitate returning proxy devices. At the home channel, an anchor device alerts other devices of the proxy device's temporary absence and preserves the proxy device's beacon slot on the home channel.

    Abstract translation: 通过在每个“家庭”频道上发送设备来定期访问其他“外部”频道来传播和收听这些频道上的广播信息，来提供在不同频道上操作的无线网络的分布式协调。 在归属信道上发送的广播分组中的信息被分配的设备中继到外部信道上的设备，作为代表家庭信道中的其他设备操作的“代理设备”。 在优选实施例中，优化该代理过程的各个方面以减少开销和延迟。 每个通道被配置为将家用设备与外部设备区分开，以避免家庭和外部设备之间的争用。 保留在外国频道上获取的信标插槽，以方便退回代理设备。 在家庭通道，锚设备向其他设备通知代理设备暂时不存在，并在家庭通道上保留代理设备的信标时隙。

    MAC PROTOCOL FOR MULTI-CHANNEL WIRELESS NETWORKS
    2.
    发明申请
    MAC PROTOCOL FOR MULTI-CHANNEL WIRELESS NETWORKS 有权
    用于多通道无线网络的MAC协议

    公开(公告)号：US20110032912A1

    公开(公告)日：2011-02-10

    申请号：US12937025

    申请日：2009-04-24

    Applicant: Carlos Cordeiro ,  Bong-Jun Ko ,  Kiran Challapali

    Inventor： Carlos Cordeiro ,  Bong-Jun Ko ,  Kiran Challapali

    IPC: H04W48/02 ,  H04W72/04

    CPC classification number: H04W48/10 ,  H04W88/182

    Abstract: A distributed coordination of a wireless network operating on different channels is provided by dispatching a device on each ‘home’ channel to regularly visit other ‘foreign’ channels to propagate and listen to broadcast information on these channels. The information in the broadcast packets transmitted on the home channel is relayed to the devices on the foreign channels by the dispatched device, as a ‘proxy device’ that operates on behalf of the other devices in the home channel. In a preferred embodiment, various aspects of this proxy process are optimized to reduce overhead and delays. Each channel is configured to distinguish home devices from foreign devices, to avoid contention between home and foreign devices. Acquired beacon slots on foreign channels are reserved to facilitate returning proxy devices. At the home channel, an anchor device alerts other devices of the proxy device's temporary absence and preserves the proxy device's beacon slot on the home channel.

    Abstract translation: 通过在每个“家庭”频道上发送设备来定期访问其他“外部”频道来传播和收听这些频道上的广播信息，来提供在不同频道上操作的无线网络的分布式协调。 在归属信道上发送的广播分组中的信息被分配的设备中继到外部信道上的设备，作为代表家庭信道中的其他设备操作的“代理设备”。 在优选实施例中，优化该代理过程的各个方面以减少开销和延迟。 每个通道被配置为将家用设备与外部设备区分开，以避免家庭和外部设备之间的争用。 保留在外国频道上获取的信标插槽，以方便退回代理设备。 在家庭通道，锚设备向其他设备通知代理设备暂时不存在，并在家庭通道上保留代理设备的信标时隙。

    DETECTION OF THE PRESENCE OF TELEVISION SIGNALS EMBEDDED IN NOISE USING CYCLOSTATIONARY TOOLBOX
    8.
    发明申请
    DETECTION OF THE PRESENCE OF TELEVISION SIGNALS EMBEDDED IN NOISE USING CYCLOSTATIONARY TOOLBOX 有权
    使用循环工具箱检测噪声中嵌入的电视信号的存在

    公开(公告)号：US20100157066A1

    公开(公告)日：2010-06-24

    申请号：US12160445

    申请日：2007-01-16

    Applicant: Kiran Challapali ,  Bin Dong ,  Dagnachew Birru

    Inventor： Kiran Challapali ,  Bin Dong ,  Dagnachew Birru

    IPC: H04N17/00

    CPC classification number: H04N5/08 ,  H04N5/21 ,  H04N5/4401 ,  H04N5/46 ,  H04N21/42607

    Abstract: A method for detecting the presence of a television signal embedded in a received signal including the television signal and noise is disclosed. Either first-order or second order cyclostationary property of the signals may be used for their detection. When the first-order cyclostationary property is used, the following method is used, the method comprising the steps of upsampling the received signal by a factor of N, performing a synchronous averaging of a set of M segments of the upsampled received signal, performing an autocorrelation of the signal; and detecting the presence of peaks in the output of the autocorrelation function. When the second order cyclostationary property of the signal is used, the method comprising the steps of delaying the received signal by a fixed delay (symbol time), multiplying the received signal with the delayed version, looking for a tone (single frequency) in the output.

    Abstract translation: 公开了一种用于检测嵌入在包括电视信号和噪声的接收信号中的电视信号的存在的方法。 信号的一阶或二阶循环平稳性可以用于它们的检测。 当使用一阶循环平稳性时，使用以下方法，该方法包括以下步骤：对接收到的信号进行上采样乘以N，对上采样的接收信号的一组M段执行同步平均， 信号的自相关; 并检测在自相关函数的输出中存在峰值。 当使用信号的二阶循环平稳性时，该方法包括以下步骤：将接收到的信号延迟固定延迟（符号时间），将接收到的信号与延迟版本相乘，在接收到的信号中寻找音调（单频） 输出。

    System for detecting redundant images in a video sequence by comparing two predetermined threshold values
    10.
    发明授权
    System for detecting redundant images in a video sequence by comparing two predetermined threshold values 失效
    用于通过比较两个预定阈值来检测视频序列中的冗余图像的系统

    公开(公告)号：US06298090B1

    公开(公告)日：2001-10-02

    申请号：US09090594

    申请日：1998-06-04

    Applicant: Kiran Challapali ,  Yingwei Chen

    Inventor： Kiran Challapali ,  Yingwei Chen

    IPC: H04N718

    CPC classification number: H04N19/587 ,  H04N19/132

    Abstract: A system for detecting redundant images in a video sequence includes dividing a target image in the video sequence into a plurality of regions, and determining, for each of the plurality of regions, a local value comprising a sum of differences between individual pixels of each region and corresponding pixels in at least one other image in the video sequence. The local value for each of the plurality of regions is then compared to a first predetermined threshold. The system also includes determining a global value comprising a sum of differences between substantially all pixels in the target image and corresponding pixels in the at least one other image, and comparing the global value to a second predetermined threshold. An indication that the target image is redundant is then output in a case that the local value does not exceed the first predetermined threshold for all regions, and the global value does not exceed the second predetermined threshold.

    Abstract translation: 一种用于检测视频序列中的冗余图像的系统，包括将视频序列中的目标图像划分为多个区域，并且针对多个区域中的每一个确定包括每个区域的各个像素之间的差异之和的局部值 以及视频序列中的至少一个其他图像中的对应像素。 然后将多个区域中的每一个的局部值与第一预定阈值进行比较。 该系统还包括确定包括目标图像中的基本上所有像素与至少一个其它图像中的相应像素之间的差的总和，并将全局值与第二预定阈值进行比较的全局值。 然后在本地值不超过所有区域的第一预定阈值并且全局值不超过第二预定阈值的情况下输出目标图像是冗余的指示。

Patent Agency Ranking