中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

42 records (took 0.04 seconds)

    METHOD AND SYSTEM FOR THE ALLOCATION OF UWB TRANSMISSION BASED ON SPECTRUM OPPORTUNITIES
    31.
    发明申请
    METHOD AND SYSTEM FOR THE ALLOCATION OF UWB TRANSMISSION BASED ON SPECTRUM OPPORTUNITIES 有权
    基于频谱机会的UWB传输分配方法与系统

    公开(公告)号：US20070213084A1

    公开(公告)日：2007-09-13

    申请号：US10599749

    申请日：2005-04-04

    Applicant: Dagnachew Birru ,  Stefan Mangold ,  Kiran Challapali ,  Javier Del Prado Pavon

    Inventor： Dagnachew Birru ,  Stefan Mangold ,  Kiran Challapali ,  Javier Del Prado Pavon

    IPC: H04B15/00 ,  H04Q7/36

    CPC classification number: H04W16/06 ,  H04B1/71632 ,  H04B1/719 ,  H04W16/14

    Abstract: A method and system for efficiently utilizing frequency spectrum resources is disclosed. The method comprises the steps of determining at least one spectrum opportunity (510), wherein the opportunity is identified by a frequency range and a time duration, determining a set of altered transmission characteristics (515, 517) to allow transmission of a desired signal in the identified frequency range, wherein the altered transmission characteristics avoid interference with signals expected in the frequency range, and transmitting said desired signal using the altered transmission characteristics when the transmission occurs during said time duration. In one aspect of the system, the step of determining at least one opportunity comprises the steps of receiving signals in known frequency ranges, and determining the characteristics of the received signals. The system comprises a receiving unit (1001) for receiving information items regarding at least one receivable signal, a processing unit (862) for determining characteristics of the at least one received signal, a managing unit (864) for altering transmission characteristics of a desired signal based on the determined received signal characteristics, wherein the altered transmission characteristics avoid interference with the received signals and a transmission unit (866) receiving said altered transmission characteristics to transmit said desired signal. In one aspect, the desired signal transmission characteristics are altered in a frequency range/time period to avoid interference with received signals in the frequency range.

    Abstract translation: 公开了一种有效利用频谱资源的方法和系统。 该方法包括以下步骤：确定至少一个频谱机会（510），其中通过频率范围和持续时间识别机会，确定一组改变的传输特性（515,517），以允许传输期望信号 所述识别的频率范围，其中所述改变的传输特性避免对在所述频率范围内期望的信号的干扰，并且当在所述持续时间期间发生传输时，使用改变的传输特性来发送所述期望信号。 在系统的一个方面，确定至少一个机会的步骤包括以下步骤：接收已知频率范围内的信号，并确定接收到的信号的特性。 该系统包括用于接收关于至少一个可接收信号的信息项的接收单元（1001），用于确定所述至少一个接收信号的特性的处理单元（862），用于改变所需接收信号的传输特性的管理单元（864） 基于所确定的接收信号特性的信号，其中所述改变的传输特性避免对接收到的信号的干扰;以及发送单元（866），接收所述改变的传输特性以发送所述期望信号。 在一个方面，期望的信号传输特性在频率范围/时间段内改变，以避免在频率范围内对接收信号的干扰。

    System and method for performing region-based image retrieval using color-based segmentation
    32.
    发明授权
    System and method for performing region-based image retrieval using color-based segmentation 失效
    使用基于颜色的分割来执行基于区域的图像检索的系统和方法

    公开(公告)号：US06577759B1

    公开(公告)日：2003-06-10

    申请号：US09375951

    申请日：1999-08-17

    Applicant: Cedric Y. Caron ,  Yong Yan ,  Kiran Challapali

    Inventor： Cedric Y. Caron ,  Yong Yan ,  Kiran Challapali

    IPC: G06K934

    CPC classification number: G06K9/342 ,  G06F17/3025 ,  G06K9/4652 ,  G06T7/11 ,  G06T2207/10016

    Abstract: There is disclosed an image retrieval system for analyzing an image in a first color model format and detecting and retrieving from the image a selected image portion. The image retrieval system comprises an image processor for converting pixels in the image from the first color model format to a (Yr&thgr;) color model format, where Y is an intensity component indicating a total amount of light, r is a saturation component indicating an amount of white light mixed with a color of each pixel, and &thgr; is a hue component indicating the color of each pixel. The image processor groups spatially adjacent pixels into image regions according to hue components of the adjacent pixels and performs a merging process wherein a first image region and an adjacent second image region are merged into a composite region if a hue difference between the first and second image regions is less than a predetermined hue difference threshold. The process is repeated to continually merge regions of similar hue until no further merges can be performed.

    Abstract translation: 公开了一种图像检索系统，用于分析第一颜色模型格式的图像，并从图像中检测和检索所选择的图像部分。 图像检索系统包括用于将图像中的像素从第一颜色模型格式转换为（Yrtheta）颜色模型格式的图像处理器，其中Y是指示总光量的强度分量，r是指示量的饱和分量 的白色光与每个像素的颜色混合，θ是表示每个像素的颜色的色调分量。 图像处理器根据相邻像素的色调分量将空间相邻像素组合成图像区域，并且执行合并处理，其中如果第一图像和第二图像之间的色调差异，则第一图像区域和相邻第二图像区域被合并到复合区域中 区域小于预定色调差值阈值。 重复该过程以连续合并相似色调的区域，直到不能进一步合并为止。

    Method for improving self-coexistence of wireless communication networks
    33.
    发明授权
    Method for improving self-coexistence of wireless communication networks 有权

    公开(公告)号：US09801073B2

    公开(公告)日：2017-10-24

    申请号：US12066860

    申请日：2006-09-16

    Applicant: Carlos Cordeiro ,  Kiran Challapali

    Inventor： Carlos Cordeiro ,  Kiran Challapali

    IPC: H04W4/00 ,  H04W16/14 ,  H04W72/12

    CPC classification number: H04W16/14 ,  H04W72/1257

    Abstract: Self-coexistence of first and second wireless communication networks (200) is improved by transmitting a coexistence beacon from a first station (210, 220) of the first wireless communication network (200) to a first station (210, 220) of the second wireless communication network (200. The coexistence beacon includes information about a traffic reservation of the first station (210, 220) of the first wireless communication network (200). The first station (210, 220) of the second wireless communication network (200) may then use this information in a variety of ways to reduce data collisions between the two networks (200). It can communicate this information to a base station (210) of the second wireless communication network (200). The base station (210) of the second wireless communication network (200) can then use this information to more efficiently allocate frequency channels and/or time slots for future traffic reservations of the first station (220) of the second wireless communication network (200).

    Network entry and device discovery for cognitive radio networks
    34.
    发明授权
    Network entry and device discovery for cognitive radio networks 有权
    认知无线电网络的网络入口和设备发现

    公开(公告)号：US08817710B2

    公开(公告)日：2014-08-26

    申请号：US12744409

    申请日：2008-11-24

    Applicant: Jianfeng Wang ,  Kiran Challapali

    Inventor： Jianfeng Wang ,  Kiran Challapali

    IPC: H04W4/00 ,  H04W72/04

    CPC classification number: H04W72/044 ,  H04W48/16

    Abstract: A device (400) scans and classifies each channel within a spectrum of channels (215-270) as being occupied or unoccupied (255), and, if occupied, whether it is occupied by a primary user (240), a secondary user (230), or an unknown user (260). As a secondary device (400), transmissions are avoided on channels occupied by primary users (490). The device selectively joins an existing network of secondary devices, or establishes a new network on an unoccupied channel (125), based on the quality of service (QoS) that the channel can provide and/or other factors. If the device is paired with a target device (115), the paired device advertises itself on a selected channel (345-360) for a period that is at least as long as the time required to scan all channels, to facilitate discovery in the event that the target device is also in a search mode. The advertising duration randomly alternates (345) among integer multiples of the scan duration.

    Abstract translation: 设备（400）扫描并分类频道（215-270）内的每个信道被占用或未被占用（255），并且如果被占用，是否被主用户（240）占用，次用户（ 230）或未知用户（260）。 作为辅助设备（400），在主要用户（490）占用的信道上避免传输。 设备选择性地加入二次设备的现有网络，或者基于信道可以提供的服务质量（QoS）和/或其他因素在未占用信道（125）上建立新网络。 如果设备与目标设备（115）配对，则配对设备在所选频道（345-360）上通告自身的持续时间至少等于扫描所有频道所需的时间，以便于在 目标设备也处于搜索模式的事件。 广告持续时间的整数倍之间随机交替（345）。

    Cognitive radio device and method for determining channel occupancy
    35.
    发明授权
    Cognitive radio device and method for determining channel occupancy 失效
    用于确定信道占用的认知无线电设备和方法

    公开(公告)号：US08780828B2

    公开(公告)日：2014-07-15

    申请号：US13119309

    申请日：2009-09-03

    Applicant: Monisha Ghosh ,  Vasanth Gaddam ,  Kiran Challapali

    Inventor： Monisha Ghosh ,  Vasanth Gaddam ,  Kiran Challapali

    IPC: H04W4/00 ,  H04W72/04 ,  H04W88/08 ,  H04W76/00

    CPC classification number: H04W72/04 ,  H04W16/14 ,  H04W76/00 ,  H04W88/08

    Abstract: A detector module (100) is operable in a cognitive radio device and capable of determining channel occupancy. The detector module comprises a sensor (110) for sensing incumbent signals at a variable sensing threshold, wherein the sensor generates a first occupancy indication indicating whether the channel includes an incumbent signal having a sensing metric above the variable sensing threshold; a geo-location unit (120) for generating a second occupancy indication based on a location of the detector module; and a decision unit (130) for generating an occupancy decision based on both the first occupancy indication and the second occupancy indication.

    Abstract translation: 检测器模块（100）可在认知无线电设备中操作并且能够确定信道占用。 检测器模块包括用于感测在可变感测阈值处的现有信号的传感器（110），其中传感器产生第一占用指示，指示信道是否包括具有高于可变感测阈值的感测度量的在线信号; 地理位置单元（120），用于基于所述检测器模块的位置产生第二占用指示; 以及用于基于所述第一占用指示和所述第二占用指示两者来生成占用决定的决定单元（130）。

    Method and system for the allocation of UWB transmission based on spectrum opportunities
    37.
    发明授权
    Method and system for the allocation of UWB transmission based on spectrum opportunities 有权
    基于频谱机会分配UWB传输的方法和系统

    公开(公告)号：US07650126B2

    公开(公告)日：2010-01-19

    申请号：US10599749

    申请日：2005-04-04

    Applicant: Dagnachew Birru ,  Stefan Mangold ,  Kiran Challapali ,  Javier Del Prado Pavon

    Inventor： Dagnachew Birru ,  Stefan Mangold ,  Kiran Challapali ,  Javier Del Prado Pavon

    IPC: H04B17/00 ,  H04B1/00 ,  H04B15/00

    CPC classification number: H04W16/06 ,  H04B1/71632 ,  H04B1/719 ,  H04W16/14

    Abstract: A method and system for efficiently utilizing frequency spectrum resources is disclosed. The method comprises the steps of determining at least one spectrum opportunity (510), wherein the opportunity is identified by a frequency range and a time duration, determining a set of altered transmission characteristics (515, 517) to allow transmission of a desired signal in the identified frequency range, wherein the altered transmission characteristics avoid interference with signals expected in the frequency range, and transmitting said desired signal using the altered transmission characteristics when the transmission occurs during said time duration. In one aspect of the system, the step of determining at least one opportunity comprises the steps of receiving signals in known frequency ranges, and determining the characteristics of the received signals. The system comprises a receiving unit (1001) for receiving information items regarding at least one receivable signal, a processing unit (862) for determining characteristics of the at least one received signal, a managing unit (864) for altering transmission characteristics of a desired signal based on the determined received signal characteristics, wherein the altered transmission characteristics avoid interference with the received signals and a transmission unit (866) receiving said altered transmission characteristics to transmit said desired signal. In one aspect, the desired signal transmission characteristics are altered in a frequency range/time period to avoid interference with received signals in the frequency range.

    Abstract translation: 公开了一种有效利用频谱资源的方法和系统。 该方法包括以下步骤：确定至少一个频谱机会（510），其中通过频率范围和持续时间识别机会，确定一组改变的传输特性（515,517），以允许传输期望信号 所述识别的频率范围，其中所述改变的传输特性避免对在所述频率范围内期望的信号的干扰，并且当在所述持续时间期间发生传输时，使用改变的传输特性来发送所述期望信号。 在系统的一个方面，确定至少一个机会的步骤包括以下步骤：接收已知频率范围内的信号，并确定接收到的信号的特性。 该系统包括用于接收关于至少一个可接收信号的信息项的接收单元（1001），用于确定所述至少一个接收信号的特性的处理单元（862），用于改变所需接收信号的传输特性的管理单元（864） 基于所确定的接收信号特性的信号，其中所述改变的传输特性避免对接收到的信号的干扰;以及发送单元（866），接收所述改变的传输特性以发送所述期望信号。 在一个方面，期望的信号传输特性在频率范围/时间段内改变，以避免在频率范围内对接收信号的干扰。

Patent Agency Ranking