公开(公告)号：US09654673B2

公开(公告)日：2017-05-16

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 ,  H04N17/02 ,  H04L7/00 ,  H04N5/08 ,  H04N5/21 ,  H04N5/44 ,  H04N21/426 ,  H04N5/46

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.

公开(公告)号：US08873470B2

公开(公告)日：2014-10-28

申请号：US12066867

申请日：2006-09-14

Applicant: Carlos Cordeiro ,  Kiran Challapali

Inventor： Carlos Cordeiro ,  Kiran Challapali

IPC: H04W4/00 ,  H04L1/22 ,  H04W16/06 ,  H04W72/04 ,  H04L5/06 ,  H04W76/02 ,  H04W74/00 ,  H04W84/12

CPC classification number: H04W72/0406 ,  H04L1/22 ,  H04L5/06 ,  H04W16/06 ,  H04W74/00 ,  H04W76/10 ,  H04W84/12

Abstract: A wireless system and method including a medium access control (MAC) layer adapted to recover service in restricted channels.

Abstract translation: 一种无线系统和方法，包括适于在受限通道中恢复服务的介质访问控制（MAC）层。

公开(公告)号：US20110170512A1

公开(公告)日：2011-07-14

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: H04W72/04

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）。

公开(公告)号：US07724713B2

公开(公告)日：2010-05-25

申请号：US10597391

申请日：2005-02-02

Applicant: Javier Del Prado Pavon ,  Amjad Soomro ,  Sai Shankar Nandagopalan ,  Zhun Zhong ,  Kiran Challapali ,  Joerg Habetha ,  Guido Hiertz

Inventor： Javier Del Prado Pavon ,  Amjad Soomro ,  Sai Shankar Nandagopalan ,  Zhun Zhong ,  Kiran Challapali ,  Joerg Habetha ,  Guido Hiertz

IPC: H04W4/00 ,  H04B7/212 ,  H04J3/00

CPC classification number: H04W48/08 ,  H04W28/06 ,  H04W52/0216 ,  H04W52/0219 ,  H04W74/04 ,  H04W80/00 ,  H04W84/12 ,  H04W84/18 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/22

Abstract: A distributed MAC protocol that includes a super-frame having a slotted Beaconing Period and a data transfer period. The super-frame includes a plurality of medium access slots which are assigned to the slotted Beaconing Period. The Beaconing Period length may be fixed or variable. The Beaconing protocol defines initializing an ad hoc network by means of starting a Beaconing Period, joining an existing Beaconing Period of ad hoc network and resolving collisions during the Beaconing Period.

Abstract translation: 一种分布式MAC协议，包括具有时隙信标周期和数据传送周期的超帧。 超帧包括分配给时隙信标时段的多个媒体接入时隙。 信标期长度可以是固定的或可变的。 信标协议定义了通过启动信标时间段来初始化一个自组织网络，加入现有的信标时代的自组织网络，并在信标期间解决冲突。

公开(公告)号：US07519032B2

公开(公告)日：2009-04-14

申请号：US10314576

申请日：2002-12-09

Applicant: Amjad Soomro ,  Kiran Challapali ,  Javier Del Prado Pavon ,  Saishankar Nandagopalan

Inventor： Amjad Soomro ,  Kiran Challapali ,  Javier Del Prado Pavon ,  Saishankar Nandagopalan

IPC: H04Q7/24

CPC classification number: H04W72/1289 ,  H04W48/08 ,  H04W52/0216 ,  H04W72/042 ,  H04W72/1284 ,  Y02D70/142 ,  Y02D70/168 ,  Y02D70/23

Abstract: An apparatus and method is disclosed for providing a Quality of Service (QoS) service schedule and bandwidth allocation message to a wireless station in a wireless network. The apparatus of the invention comprises a hybrid coordinator that is capable of (1) creating a Quality of Service (QoS) service schedule and a bandwidth allocation message for a wireless station and (2) sending the QoS service schedule and the bandwidth allocation message to the wireless station. The wireless station is capable of using the scheduling information to perform power management by entering a power save mode during times when the hybrid coordinator has not scheduled any transmission opportunities.

Abstract translation: 公开了一种用于向无线网络中的无线站提供服务质量（QoS）服务调度和带宽分配消息的装置和方法。 本发明的装置包括能够（1）为无线站创建服务质量（QoS）服务调度和带宽分配消息的混合协调器，以及（2）将QoS服务调度和带宽分配消息发送到 无线电台。 在混合协调器尚未调度任何传输机会的时间期间，无线站能够使用调度信息来执行功率管理。

公开(公告)号：US20080259895A1

公开(公告)日：2008-10-23

申请号：US10597543

申请日：2005-02-03

Applicant: Joerg Habetha ,  Guido Hiertz ,  Javier Del Prado Pavon ,  Kiran Challapali ,  Sai Shankar Nandagopalan

Inventor： Joerg Habetha ,  Guido Hiertz ,  Javier Del Prado Pavon ,  Kiran Challapali ,  Sai Shankar Nandagopalan

IPC: H04J3/00 ,  H04L12/43 ,  H04Q7/24

CPC classification number: H04W74/04 ,  H04B1/7163 ,  H04W28/26 ,  H04W72/0446 ,  H04W74/002 ,  H04W84/12 ,  H04W84/18 ,  Y02D70/14

Abstract: A system (300), apparatus (301), and method are provided for decentralized medium access control comprising an enhanced protocol for UWB MAC that includes a distributed reservation protocol (DRP) for distributed reservation of the medium (310). The invention also relates to any wireless system (300) that uses a MAC protocol comprising a distributed reservation protocol. The method comprises devices (301) announcing medium reservations in beacons (400) and devices (301) that receive such announcements respecting the reservations.

Abstract translation: 提供了一种用于分散介质访问控制的系统（300），装置（301）和方法，其包括用于UWB MAC的增强协议，其包括用于介质（310）的分布式预留的分布式预留协议（DRP）。 本发明还涉及使用包括分布式预留协议的MAC协议的任何无线系统（300）。 该方法包括通知信标中的媒体预留（400）的装置（301）和接收关于保留的这种通告的装置（301）。

公开(公告)号：US20080253350A1

公开(公告)日：2008-10-16

申请号：US10597388

申请日：2005-01-28

Applicant: Kiran Challapali ,  Stefan Mangold

Inventor： Kiran Challapali ,  Stefan Mangold

IPC: H04J3/00 ,  G06K9/36

CPC classification number: G01S7/021

Abstract: The invention includes a method and device for identifying opportunities to transmit in a radio network. The method and device listen for a first, second, and third period of time to detect first, second, and third busy slots. A processor recognizes a sequence of the first, second, and third busy slots as a function of time, performs a Randomized Hough Transform on the sequence, generates a histogram based on the Randomized Hough Transform, identifies peaks in the histogram, determines whether the peaks correspond to a known radar, and identifies an opportunity to transmit.

Abstract translation: 本发明包括用于识别在无线电网络中传送的机会的方法和装置。 方法和设备监听第一，第二和第三时间段以检测第一，第二和第三忙时隙。 处理器根据时间来识别第一，第二和第三繁忙时隙的序列，对序列执行随机化霍夫变换，基于随机霍夫变换产生直方图，识别直方图中的峰，确定峰的峰值 对应于已知的雷达，并识别发送的机会。

公开(公告)号：US20080253341A1

公开(公告)日：2008-10-16

申请号：US12066860

申请日：2006-09-16

Applicant: Carlos Cordeiro ,  Kiran Challapali

Inventor： Carlos Cordeiro ,  Kiran Challapali

IPC: H04Q7/24

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).

Abstract translation: 通过将来自第一无线通信网络（200）的第一站（210,220）的共存信标发送到第二无线通信网络（200）的第一站（210,220）来改善第一和第二无线通信网络（200）的自共存 无线通信网络（200）。共存信标包括关于第一无线通信网络（200）的第一站（210,220）的业务预留的信息，第二无线通信网络（200）的第一站（210,220） ）可以以各种方式使用该信息来减少两个网络（200）之间的数据冲突，它可以将该信息传送到第二无线通信网络（200）的基站（210），基站（210） 然后可以使用该信息来更有效地分配用于第一站（220）的未来业务预留的频率信道和/或时隙， 的第二无线通信网络（200）。

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。