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    • 5. 发明申请
    • DYNAMIC FREQUENCY SELECTION SCHEME FOR IEEE 802.11 WLANs
    • 用于IEEE 802.11 WLAN的动态频率选择方案
    • WO2002093839A2
    • 2002-11-21
    • PCT/IB2002/001574
    • 2002-05-06
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.
    • CHOI, SunghyunMANGOLD, StefanSOOMRO, Amjad
    • H04L12/28
    • H04W36/06H04W16/14H04W84/12
    • Disclosed is a method and system for dynamically selecting a communication channel between an access point (AP) and a plurality of stations (STAs) in an IEEE 802.11 wireless local area network (WLAN). The method includes the steps of: determining whether a new channel to be used by the plurality of STAs is needed; measuring the channel quality of a plurality of frequency channels by at least one of the plurality of STAs; reporting the quality of the plurality of frequency channels in terms of a received signal strength indication (RSSI), Clear Channel Assessment (CCA) busy periods and periodicity; and, selecting one of the candidate channels based on the channel quality report for use in communication between the AP and the plurality of STAs.
    • 公开了一种在IEEE 802.11无线局域网(WLAN)中动态选择接入点(AP)和多个站(STA)之间的通信信道的方法和系统。 该方法包括以下步骤:确定是否需要由多个STA使用的新信道; 通过所述多个STA中的至少一个来测量多个频率信道的信道质量; 根据接收信号强度指示(RSSI),清除信道评估(CCA)繁忙周期和周期性来报告多个频率信道的质量; 以及基于用于AP与多个STA之间的通信中的信道质量报告来选择一个候选信道。
    • 9. 发明申请
    • SYSTEM AND METHOD FOR OPPORTUNISTIC SPECTRUM-SHARING BY SPECTRUM AGILE RADIOS (SARA)
    • 通过光谱辐射(SARA)进行机动分光光谱分析的系统与方法
    • WO2007000740A1
    • 2007-01-04
    • PCT/IB2006/052137
    • 2006-06-27
    • KONINKLIJKE PHILIPS ELECTRONICS, N.V.MANGOLD, StefanCHOU, Chun-Ting
    • MANGOLD, StefanCHOU, Chun-Ting
    • H04B1/713H04Q7/36
    • H04W16/14H04B2001/7154
    • An apparatus (301. i), system (300) and method are provided for opportunistically sharing spectrum between and among Spectrum Agile Radio (SARA) devices (301.i), primary (3O2.i) and secondary devices (303.i). A primary device (3O2.i) is a licensed radio system operating in licensed bands. A secondary device (303. i) is any system/device operated in an unlicensed band. Each SARA device (301.i) maintains a Spectrum Opportunity Map (SOM) (200), which is populated by the SARAs (301.i) using the spectrum and by sharing SOMs (200) among SARAs (301.i). A SARA device (301/i) probes the medium for evidence of spectrum usage and may receive explicit information concerning spectrum usage from a primary (3O2.i) which it then records in its SOM (200) and may share its SOM (200) with other SARA devices (301.i).
    • 提供了一种设备(301.i),系统(300)和方法,用于在频谱敏捷无线电(SARA)设备(301.i),主(302.i)和辅助设备(303.i)之间和之间机会地共享频谱, 。 主要设备(302.i)是在许可频带中运行的许可无线电系统。 辅助设备(303.i)是在非许可频带中操作的任何系统/设备。 每个SARA设备(301.i)维护频谱机会图(SOM)(200),其由SARA(301.i)使用频谱填充,并且通过在SARA(301.i)之间共享SOM(200)。 SARA设备(301 / i)探测媒体用于频谱使用的证据,并且可以从主(302.i)接收关于频谱使用的明确信息,然后它在其SOM(200)中记录并可以共享其SOM(200) 与其他SARA设备(301.i)。
    • 10. 发明申请
    • METHOD AND SYSTEM FOR THE ALLOCATION OF UWB TRANSMISSION BASED ON SPECTUM OPPORTUNITIES
    • 基于SPECTUM机会的UWB传输分配方法与系统
    • WO2005099293A1
    • 2005-10-20
    • PCT/IB2005/051113
    • 2005-04-04
    • KONINKLIJKE PHILIPS ELECTRONICS, N.V.BIRRU, DagnachewMANGOLD, StefanCHALLAPALI, KiranDEL PRADO PAVON, Javier
    • BIRRU, DagnachewMANGOLD, StefanCHALLAPALI, KiranDEL PRADO PAVON, Javier
    • H04Q7/36
    • H04W16/06H04B1/71632H04B1/719H04W16/14
    • 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.
    • 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,并确定所接收信号的特性。 该系统包括用于接收关于至少一个可接收信号的信息项目的接收单元(1001),用于确定至少一个接收信号的特性的处理单元(862),用于改变所需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。