Patents by Inventor Johnny D. Shepherd

Johnny D. Shepherd 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: 7457263
    Abstract: Apparatus and Method for Channel Request in a Wireless Communication System. The present invention provides a method to request channels in a wireless communication system in order to efficiently allocate channel resources by using channel function information about each transceiver. A method is provided in a wireless communication system which includes a communication link having a plurality of channels and a plurality of radio heads each having transceivers for connecting to mobile terminals. The method comprises defining a channel function for a transceiver of one of the radio heads, determining whether the transceiver requires a dedicated channel for the channel function, and, if the transceiver requires the dedicated channel for the channel function, requesting a channel for the transceiver.
    Type: Grant
    Filed: October 30, 2001
    Date of Patent: November 25, 2008
    Assignee: Ericsson, Inc.
    Inventor: Johnny D. Shepherd
  • Patent number: 6950414
    Abstract: A method and apparatus for providing timing information to radio heads in a wireless communications system. One or more radio heads are connected to a central unit by a respective cable. This cable includes at least two sets of conductors. The first set carries communication data between the central unit and the radio head. This communication data may be user data, such as voice, data, or fax data, and optionally control data. This communication data is transferred between the radio head and the central unit using an asynchronous transmit method. Due to its variable timing of successful receipt, it may be difficult to send highly accurate timing data via asynchronous transmit methods. Instead, a synchronous transmit method may be advantageously employed to send timing data in the present invention. The timing data is sent on the second set of conductors of the same cable using a synchronous transmit method.
    Type: Grant
    Filed: October 17, 2000
    Date of Patent: September 27, 2005
    Assignee: Ericsson Inc.
    Inventors: Ossi I. Grohn, Johnny D. Shepherd
  • Patent number: 6804540
    Abstract: A distributed antenna system in a communication system includes a programmable band pass filter at each antenna within the distributed system. Control information from a processor associated with the base station may instruct the band pass filter as to on which channels a particular antenna should transmit. In this manner, channel reuse may be promoted and channels can be dynamically reassigned during periods of peak usage.
    Type: Grant
    Filed: August 2, 2000
    Date of Patent: October 12, 2004
    Assignee: Ericsson Inc.
    Inventors: Johnny D. Shepherd, Ossi I. Grohn
  • Patent number: 6788961
    Abstract: The selection of the primary control signal bus to use for a given radio head is based on propagation delay to the relevant radio head. A plurality of radio heads are cascaded in a chain with buffered error correction therebetween. At least first and second control interfaces connect to the chain and supply control information thereto via respective control signal busses, which may be virtual busses. The propagation delay from a first control interface to a first radio head over a first bus is determined. Likewise, the propagation delay from a second control interface to the first radio head over a second bus is determined. Thereafter, the radio head determines which control signal bus to select as its primary control signal bus based on the respective propagation delays between the first radio head and the first and second control interfaces.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: September 7, 2004
    Assignee: Ericsson Inc.
    Inventors: Joseph A. Repice, Johnny D. Shepherd
  • Publication number: 20030114111
    Abstract: A base station tunes a transceiver to listen to accesses made by mobile terminals on the base stations own control channel. Once the functionality of the transceiver is verified by correlating the known accesses to the received accesses, the base station then tunes the transceiver to control channels of nearby cells to receive accesses directed to those nearby cells. From these accesses, the MSC can determine carrier-to-interference ratios between the cells.
    Type: Application
    Filed: December 18, 2001
    Publication date: June 19, 2003
    Inventors: Johnny D. Shepherd, Jeff D. Seifert
  • Publication number: 20030081568
    Abstract: Apparatus and Method for Channel Request in a Wireless Communication System. The present invention provides a method to request channels in a wireless communication system in order to efficiently allocate channel resources by using channel function information about each transceiver. A method is provided in a wireless communication system which includes a communication link having a plurality of channels and a plurality of radio heads each having transceivers for connecting to mobile terminals. The method comprises defining a channel function for a transceiver of one of the radio heads, determining whether the transceiver requires a dedicated channel for the channel function, and, if the transceiver requires the dedicated channel for the channel function, requesting a channel for the transceiver.
    Type: Application
    Filed: October 30, 2001
    Publication date: May 1, 2003
    Inventor: Johnny D. Shepherd
  • Publication number: 20030061422
    Abstract: The selection of the primary control signal bus to use for a given radio head is based on propagation delay to the relevant radio head. A plurality of radio heads are cascaded in a chain with buffered error correction therebetween. At least first and second control interfaces connect to the chain and supply control information thereto via respective control signal busses, which may be virtual busses. The propagation delay from a first control interface to a first radio head over a first bus is determined. Likewise, the propagation delay from a second control interface to the first radio head over a second bus is determined. Thereafter, the radio head determines which control signal bus to select as its primary control signal bus based on the respective propagation delays between the first radio head and the first and second control interfaces.
    Type: Application
    Filed: September 26, 2001
    Publication date: March 27, 2003
    Inventors: Joseph A. Repice, Johnny D. Shepherd