公开(公告)号：US20080219201A1

公开(公告)日：2008-09-11

申请号：US12066882

申请日：2005-09-16

Applicant: Kiran Challapali ,  Dagnachew Birru ,  Carlos Cordeiro

Inventor： Kiran Challapali ,  Dagnachew Birru ,  Carlos Cordeiro

IPC: H04J15/00

CPC classification number: H04W24/10 ,  H04W36/30 ,  H04W74/00 ,  H04W80/00

Abstract: In a wireless communication network (200) comprising a base station (210) and a plurality of remote terminals (220), the plurality of remote terminals (220) are divided into a plurality of clusters (230) for communication with the base station (210), and each of the remote terminals (220) is assigned to a cluster (230) based on at least one characteristic, measured by one or more of the remote terminals (220), of one or more external signals transmitted by one or more external terrestrial transmitters (250) not associated with the communication network (200). Accordingly: a parameter of a communication between the base station (210) and each remote terminal (220) may be selected according to the cluster (230) to which each remote terminal (220) belongs; remote terminals (220) within a cluster (230) may be enabled to communicate directly with each other; and/or remote terminals (220) may be selected to perform frequency spectrum profile measurements of the frequency band used by the communication network (200) according to the clusters (230) to which they are assigned.

Abstract translation: 在包括基站（210）和多个远程终端（220）的无线通信网络（200）中，所述多个远程终端（220）被划分成多个群集（230），用于与基站 210），并且基于由一个或多个远程终端（220）测量的由一个或多个远程终端（220）发送的一个或多个外部信号的至少一个特征，将每个远程终端（220）分配给群集（230） 与通信网络（200）不相关联的更多的外部地面发射机（250）。 因此，可以根据每个远程终端（220）所属的集群（230）来选择基站（210）和每个远程终端（220）之间的通信的参数; 可以使群集（230）内的远程终端（220）能够彼此直接通信; 和/或远程终端（220）可以被选择来执行由通信网络（200）根据它们被分配到的群集（230）使用的频带的频谱分布测量。

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。

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。