Patents by Inventor Walter F. Rausch

Walter F. Rausch has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9591537
    Abstract: A mobile station receives a neighbor list from a base station in an area of a public wireless network that borders a private wireless network. The neighbor list includes encrypted channel identifiers corresponding to private network channels transmitted by the private wireless network and unencrypted channel identifiers corresponding to public network channels transmitted by the public wireless network. If the mobile station does not subscribe to the private wireless network, the mobile station does not recognize the encrypted channel identifiers and simply ignores them. However, if the mobile station subscribes to the private wireless network, the mobile station decrypts the encrypted channel identifiers and determines whether it is able to initiate a handoff to any of the corresponding private network channels.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: March 7, 2017
    Assignee: Sprint Spectrum L.P.
    Inventors: David L. Harris, Walter F. Rausch
  • Patent number: 9374603
    Abstract: A method disclosed herein comprises receiving first content into a wireless access system from a backhaul link between the wireless access system and a service system, transmitting the first content from the wireless access system to a first device served by the wireless access system, receiving a second packet communication from a second device served by the wireless access system wherein the second packet communication includes a second content request, processing the second packet communication to determine a second content identifier included in the second content request, processing the second content identifier to determine if the second content is the same as the first content, buffering the first content and transmitting the buffered first content to the second device, and transferring the second packet communication to a communication network to obtain the second content.
    Type: Grant
    Filed: April 15, 2008
    Date of Patent: June 21, 2016
    Assignee: Sprint Communications Company L.P.
    Inventors: David L. Harris, Walter F. Rausch, Kosol Jintaseranee
  • Patent number: 9236895
    Abstract: In a Radio Frequency (RF) filter, a first conductive link has a first length corresponding to a first (N) number of wavelengths of a primary RF frequency. A second conductive link has a second length corresponding to both a second (M) number of wavelengths of the primary RF frequency and an out-out-phase (X) number of wavelengths of a secondary RF frequency. An input interface receives an input RF signal and transfers a first component of the input signal over the first link and transfers a second component of the input RF signal over the second link. An output interface combines the first component from the first link with the second component from the second link to transfer an output RF signal. The energy at the primary frequency constructively combines in-phase, but the energy at the secondary frequency destructively combines out-of-phase.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: January 12, 2016
    Assignee: Clearwire IP Holdings LLC
    Inventor: Walter F. Rausch
  • Patent number: 9137719
    Abstract: A method of operating a communication system is disclosed. A time sensitive data stream is sent to a wireless device via a first wireless station. A handoff criteria is determined to have been satisfied. Based on the handoff criteria being satisfied, at least one control message is sent that instructs the wireless device to increase a buffer size associated with the time sensitive data stream.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: September 15, 2015
    Assignee: Clearwire IP Holdings LLC
    Inventors: David L. Harris, Walter F. Rausch
  • Patent number: 8536949
    Abstract: A fixed-gain power amplifier receives a preamplifier output signal and produces a power output signal. The preamplifier output signal is amplified by the fixed-gain power amplifier to produce the power output signal. The variable-gain preamplifier receives an input signal, a preamplifier control signal, and produces the preamplifier output signal. The input signal is amplified by a preamplifier amount of gain by the variable-gain preamplifier to produce the preamplifier output signal. The preamplifier amount of gain is based on the preamplifier control signal. A variable attenuator receives the power output signal, an attenuator control signal, and produces an output signal. The power output signal is attenuated by an attenuator amount of attenuation by the variable attenuator to produce the output signal. The attenuator amount of attenuation is based on the attenuator control signal.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: September 17, 2013
    Assignee: Sprint Communications Company L.P.
    Inventors: Harry W. Perlow, Habib Riazi, Walter F. Rausch
  • Patent number: 8442467
    Abstract: In a wireless communication device, circuitry selects a first frequency band for a first wireless communication and transfers a pair of radio frequency signals at the first frequency band. An antenna receives and orthogonally transmits the radio frequency signals over a first patch antenna element that is resonant at the first frequency band. The circuitry selects a second frequency band for a second wireless communication and transfers a pair of radio frequency signals at the second frequency band and including a voltage component. The antenna receives the radio frequency signals including the voltage component, couples a second patch antenna element to the first patch antenna element in response to the voltage component, and orthogonally transmits the radio frequency signals over the coupled patch antenna elements that together are resonant at the second frequency band.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: May 14, 2013
    Assignee: Sprint Communications Company L.P.
    Inventors: Walter F. Rausch, Harry W. Perlow, Habib Riazi
  • Patent number: 8369268
    Abstract: A multiple device to one-antenna combining circuit for transferring wireless communication signals from a first and second wireless communication device connected to a donor antenna is described. The circuit comprises a first single-stage circulator configured to be coupled to a transmission-reception path of the first wireless communications device; a two-stage circulator coupled to the first single-stage circulator and configured to be coupled a transmission-reception path of the second wireless communications device; a two-way splitter coupled to the two-stage circulator and configured to be coupled a transmission-reception path of the donor antenna; and a second single-stage circulator coupled between the two-way splitter and the first single stage circulator. The wireless transmissions of the first wireless communications device travel from the first signal stage circulator to the two-stage circulator to the two-way splitter to the donor antenna. The first wireless device can be a repeater.
    Type: Grant
    Filed: November 6, 2009
    Date of Patent: February 5, 2013
    Assignee: Clearwire IP Holdings LLC
    Inventor: Walter F. Rausch
  • Patent number: 8335188
    Abstract: A mobile station receives a neighbor list from a base station in an area of a public wireless network that borders a private wireless network. The neighbor list includes encrypted channel identifiers corresponding to private network channels transmitted by the private wireless network and unencrypted channel identifiers corresponding to public network channels transmitted by the public wireless network. If the mobile station does not subscribe to the private wireless network, the mobile station does not recognize the encrypted channel identifiers and simply ignores them. However, if the mobile station subscribes to the private wireless network, the mobile station decrypts the encrypted channel identifiers and determines whether it is able to initiate a handoff to any of the corresponding private network channels.
    Type: Grant
    Filed: May 19, 2008
    Date of Patent: December 18, 2012
    Assignee: Sprint Spectrum L.P.
    Inventors: David L. Harris, Walter F. Rausch
  • Patent number: 8295774
    Abstract: Methods and apparatuses for determining uplink receive signal path characteristics in a wireless communication system are disclosed. In one embodiment, a tower-top noise source (TTNS) is provided such that it is permanently affixed in close proximity to a receive antenna. The TTNS preferably has an output that includes a wideband noise signal having predetermined characteristics. The TTNS output is selectively connected to a receive signal path that includes a tower-top low-noise amplifier (TTLNA). An altered version of the wideband noise signal is received at the output of the receive signal path, and a characteristic of the altered wideband noise signal is measured.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: October 23, 2012
    Assignee: Clearwire IP Holdings LLC
    Inventors: Walter F. Rausch, Douglas A. Hyslop, David A. Maples, Ivy Y. Kelly
  • Patent number: 8160831
    Abstract: A gyroscope monitoring system operates with an antenna system that has a gyroscope that controls the position of multiple antennas. The monitoring system receives data indicating reference signal strengths and test signal strengths for the antennas. The monitoring system determines differences between the reference signal strengths and the test signal strengths. The monitoring system processes the differences to determine if the gyroscope has lost reference point accuracy, and if so, then the monitoring system generates an indication that the gyroscope has lost reference point accuracy. In some examples, the monitoring system also determines reference point offsets for the gyroscope and provides the offsets to the gyroscope for use in motion measurements.
    Type: Grant
    Filed: July 15, 2009
    Date of Patent: April 17, 2012
    Assignee: Sprint Communications Company L.P.
    Inventors: Walter F. Rausch, Mohammad Wasif Hussain, Rushi D. Shah, Harry W. Perlow, Mohan R. Tammisetti, Harold Wayne Johnson
  • Patent number: 8027646
    Abstract: A communication system is supplied for filtering and attenuating a receive signal in between a bi-directional antenna system and a bi-directional base station system. In the communication system, a first circulator is configured to receive a receive signal from a first bi-directional link coupled to the bi-directional antenna system and circulate the receive signal to a first uni-directional link. A signal processing system is configured to receive the receive signal from the first uni-directional link, filter and attenuate the receive signal, and transfer the receive signal to a second uni-directional link. A second circulator is configured to receive the receive signal from the second uni-directional link, circulate the receive signal to a second bi-directional link coupled to the bi-directional base station system, receive a transmit signal from the second bi-directional link, and circulate the transmit signal to a third uni-directional link.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: September 27, 2011
    Assignee: Clear Wireless LLC
    Inventors: Walter F. Rausch, Harry W. Perlow, Habib Riazi
  • Publication number: 20110110277
    Abstract: A multiple device to one-antenna combining circuit for transferring wireless communication signals from a first and second wireless communication device connected to a donor antenna is described. The circuit comprises a first single-stage circulator configured to be coupled to a transmission-reception path of the first wireless communications device; a two-stage circulator coupled to the first single-stage circulator and configured to be coupled a transmission-reception path of the second wireless communications device; a two-way splitter coupled to the two-stage circulator and configured to be coupled a transmission-reception path of the donor antenna; and a second single-stage circulator coupled between the two-way splitter and the first single stage circulator. The wireless transmissions of the first wireless communications device travel from the first signal stage circulator to the two-stage circulator to the two-way splitter to the donor antenna. The first wireless device can be a repeater.
    Type: Application
    Filed: November 6, 2009
    Publication date: May 12, 2011
    Inventor: Walter F. Rausch
  • Patent number: 7937063
    Abstract: A method and system for protecting a LNA by acquiring a radio frequency control channel signal at a tower top low noise amplifier (TTLNA) system. In response to acquiring the radio frequency control channel signal, LNA mode information is determined from the acquired radio frequency control channel signal. Based at least in part on the determination, the TTLNA is configured to either receive mode when the LNA mode information indicates receive mode or transmit mode when the LNA mode information indicates transmits mode. In an exemplary embodiment, the TTLNA is configured to receive mode only after a determination is made that there is no transmit energy present on the feedline connecting the BTS and the antenna. In another exemplary embodiment, the TTLNA is initialized in transmit mode.
    Type: Grant
    Filed: August 29, 2007
    Date of Patent: May 3, 2011
    Assignee: Clear Wireless LLC
    Inventors: Walter F. Rausch, David A. Maples
  • Publication number: 20110096754
    Abstract: A method of operating a communication system is disclosed. A time sensitive data stream is sent to a wireless device via a first wireless station. A handoff criteria is determined to have been satisfied. Based on the handoff criteria being satisfied, at least one control message is sent that instructs the wireless device to increase a buffer size associated with the time sensitive data stream.
    Type: Application
    Filed: October 27, 2009
    Publication date: April 28, 2011
    Applicant: Clear Wireless LLC
    Inventors: David L. Harris, Walter F. Rausch
  • Patent number: 7881752
    Abstract: A system and method for utilizing a multi link antenna array for wireless links in conjunction with fiber MAN's is disclosed. The fiber MAN's are coupled to one or more multi-link antenna arrays. Each multi-link antenna array forms a plurality of point-to-point wireless links.
    Type: Grant
    Filed: June 19, 2006
    Date of Patent: February 1, 2011
    Assignee: Sprint Communications Company L.P.
    Inventors: Harold W. Johnson, Bruce E. Hoffman, Walter F. Rausch
  • Patent number: 7831213
    Abstract: Controlling a tower-top low noise amplifier (TTLNA) without transmit mode or receive mode timing control signals from a base station. The TTLNA system and associated components autonomously determine the proper mode of operation (transmit/receive), and automatically control the operation of a low noise amplifier (LNA) to prevent signal distortion and/or damage to the wireless system hardware. A preferred method comprises: at a TTLNA, measuring a transmit time period based on detecting radio frequency (RF) transmit signal energy; determining a receive time duration based on the measured time period and a predetermined frame time; and, configuring the TTLNA to a receive mode by placing a low noise amplifier into a receive signal path during the determined receive time duration.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: November 9, 2010
    Assignee: Clear Wireless LLC
    Inventors: Walter F. Rausch, William Bloomingdale, David A. Maples
  • Patent number: 7733814
    Abstract: A time-division communication system wirelessly receives a communication signal during receive time periods and wirelessly transfers a communication signal during transmit time periods. These communication signals have multiple receive and transmit channels. The communication system circulates the received communication signal to various filters that pass particular receive channels and that reflect other receive channels back the circulator(s). Eventually, the reflected receive channels circulate to the appropriate filters and are passed. The filters also pass transmit channels to the circulator(s) where they are circulated and reflected until they combine into the transmit communication signal.
    Type: Grant
    Filed: May 19, 2008
    Date of Patent: June 8, 2010
    Inventors: Walter F. Rausch, Harry W. Perlow
  • Patent number: 7642961
    Abstract: An antenna positioning system comprises a first antenna system, a second antenna system, and a computer system. The computer system determines azimuths and elevations for the antenna systems to point at one another. The computer system retrieves license data for the antenna systems and determines if the antenna systems are licensed for the azimuths and elevations. If the antenna systems are licensed for the azimuths and elevations, then the computer system transfers control signals to the antenna systems indicating the azimuths and elevations. In response to the control signals, the antenna systems position themselves to the azimuths and elevations.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: January 5, 2010
    Assignee: Sprint Communications Company L.P.
    Inventor: Walter F. Rausch
  • Patent number: 7642988
    Abstract: A system and method for mounting a plurality of antenna elements onto a cell tower is disclosed. The plurality of antennas are mounted into a radome enclosure. The radome enclosure has an outer size and shape that matches the outer size and shape of a cellular antenna element. The radome enclosure is configured to attach to a cellular tower using the same physical mounting system as the cellular antenna elements. The plurality of antennas provide multiple point-to-point links that may be used for wireless backhaul links or other applications.
    Type: Grant
    Filed: June 19, 2006
    Date of Patent: January 5, 2010
    Assignee: Sprint Communications Company L.P.
    Inventors: Harold W. Johnson, Bruce E. Hoffman, Walter F. Rausch
  • Patent number: 7593753
    Abstract: An antenna system for transferring wireless communication signals between a wireless communication device and a base station is provided. The system includes a first linear polarization antenna associated with a first signal, and a second linear polarization antenna associated with a second signal and oriented perpendicularly to the first antenna. The first and second antennas are coupled to a phase shifter through first and second signal attenuators configured to selectively attenuate the first and second signals, respectively. The phase shifter is also coupled with the base station, and is configured to delay the phase of the first signal by ninety degrees. In addition, an attenuator controller coupled with the first and second attenuators is configured to control when the first and second signal attenuators attenuate the first and second signals.
    Type: Grant
    Filed: July 19, 2005
    Date of Patent: September 22, 2009
    Assignee: Sprint Communications Company L.P.
    Inventor: Walter F. Rausch