US Patent No: 5,655,217

Number of patents in Portfolio can not be more than 2000

Spectrum sharing communications system for monitoring available spectrum

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Importance

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Abstract

A mobile radio communications network is provided with a system for allocating one or more ranges of transmission frequency to the communications network, in order to prevent the network from interfering with received signals of an incumbent radio system. The allocating system may be provided with a device for receiving and monitoring information indicative of the presence and location of incumbent radio stations. A signal level monitoring system monitors signals transmitted from incumbent radio stations to determine the frequency and degree of RF isolation, with respect to a monitoring antenna of the monitoring system, of the stations. The monitoring system includes monitoring antennas, a spectrum analyzer, a device for controlling the spectrum analyzer, and a device for processing and correcting the data produced by the spectrum analyzer.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
SBC TECHNOLOGY RESOURCES, INC.AUSTIN, TX171

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Lemson, Paul Hendrick St. Louis, MO 1 63

Cited Art

Patent Info (Count) # Cites Year
 
MOTOROLA, INC. (2)
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AMERICAN PCS COMMUNICATIONS, LLC (1)
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AVAYA TECHNOLOGY CORP. (1)
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BELL CANADA INTERNATIONAL INC. (1)
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INTELLECTUAL VENTURES II LLC (1)
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MOTOROLA MOBILITY LLC (1)
5,428,819 Method and apparatus for radio frequency bandwidth sharing among heterogeneous radio communication system 51 1993
 
MOTOROLA MOBILITY, INC. (1)
5,355,522 Frequency selection method and apparatus 52 1992

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
SHARED SPECTRUM COMPANY (10)
7,146,176 System and method for reuse of communications spectrum for fixed and mobile applications with efficient method to mitigate interference 2 2001
7,564,816 Method and system for determining spectrum availability within a network 14 2006
8,027,249 Methods for using a detector to monitor and detect channel occupancy 0 2006
8,184,653 Systems and methods for a cognitive radio having adaptable characteristics 0 2007
8,055,204 Methods for detecting and classifying signals transmitted over a radio frequency spectrum 0 2007
8,184,678 Method and system for transmitting signals with reduced spurious emissions 0 2008
RE43066 System and method for reuse of communications spectrum for fixed and mobile applications with efficient method to mitigate interference 0 2008
8,064,840 Method and system for determining spectrum availability within a network 0 2009
8,326,313 Method and system for dynamic spectrum access using detection periods 0 2009
8,155,649 Method and system for classifying communication signals in a dynamic spectrum access system 1 2009
 
CISCO TECHNOLOGY, INC. (9)
6,088,591 Cellular system hand-off protocol 70 1996
6,138,019 Cellular system hand-off protocol 107 1996
7,269,151 System and method for spectrum management of a shared frequency band 35 2002
7,424,268 System and method for management of a shared frequency band 49 2003
7,408,907 System and method for management of a shared frequency band using client-specific management techniques 18 2003
7,184,777 Server and multiple sensor system for monitoring activity in a shared radio frequency band 55 2003
7,110,756 Automated real-time site survey in a shared frequency band environment 44 2004
7,444,145 Automated real-time site survey in a shared frequency band environment 5 2006
8,175,539 System and method for management of a shared frequency band 1 2010
 
INTELLECTUAL VENTURES I LLC (7)
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7,058,040 Channel interference reduction 19 2001
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8,200,221 Measurements in communications systems 0 2008
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WENGEN WIRELESS LLC (2)
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WIRELESS STRATEGIES, INC. (2)
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ALLEN TELECOM LLC (1)
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CONGNIO, INC. (1)
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CROWN CASTLE INTERNATIONAL CORP (1)
7,116,980 Method and system for management of radio frequency communication coverage over wide geographic areas 5 2003
 
FREESCALE SEMICONDUCTOR, INC. (1)
5,825,826 Method and apparatus for frequency domain ripple compensation for a communications transmitter 9 1996
 
FUTUREWEI TECHNOLOGIES, INC. (1)
8,320,948 System and method for probability-based resource allocation in a wireless communications system 2010
 
HER MAJESTY IN RIGHT OF CANADA AS REPRESENTED BY THE MINISTER OF COMMUNICATIONS (1)
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HONG KONG APPLIED SCIENCE AND TECHNOLOGY RESEARCH INSTITUTE CO., LTD. (1)
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INTEL CORPORATION (1)
7,155,230 Dynamic frequency selection and radar detection with a wireless LAN 14 2002
 
LGC WIRELESS, INC. (1)
6,381,463 Method and apparatus for providing intelligent cellular handoff 20 1997
 
METRIC SYSTEMS, INC. (1)
6,952,563 Method and apparatus for adaptively setting frequency channels in a multi-point wireless networking system 9 2001
 
MOTOROLA, INC. (1)
5,867,785 Method for providing communication service to communication units located within a common carrier transportation device 22 1996
 
NOKIA CORPORATION (1)
7,890,100 Methods for allocating roaming number and forming visitor location register in mobile network, and mobile network 0 2003
 
NOKIA NETWORKS OY (1)
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NOKIA TELECOMMUNICATIONS OY (1)
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ROCKSTAR BIDCO, LP (1)
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SAMSUNG ELECTRONICS CO., LTD. (1)
6,622,007 Datacast bandwidth in wireless broadcast system 14 2001
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
RE44237 System and method for reuse of communications spectrum for fixed and mobile applications with efficient method to mitigate interference 0 2010