Patents by Inventor Richard John Albrow

Richard John Albrow 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).

  • Transmission of digital data messages in digital telephony
    Patent number: 6061340
    Abstract: In a communications between a base station and subscriber unit in time slots within fixed length time frames, different types of messages require different numbers of timeslots per frame to maintain transmission rate. At least a portion of the message is detected to determine the type of message, and if appropriate, additional time slot(s) are assigned.
    Type: Grant
    Filed: May 28, 1997
    Date of Patent: May 9, 2000
    Assignee: Ionica International Limited
    Inventors: Richard John Albrow, Simon Alexander Black, Leigh Carter, Rupert Leslie Alexander Goodings, Paul Maxwell Martin, Neil Philip Piercy
  • Control signal transmission in digital radio telephony
    Patent number: 6044086
    Abstract: In transmission between a base station and a subscriber unit, system control signals are sent in time slots within fixed length time frames. The system control signals are fragmented, each fragment being sent in a different time slot of a frame.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: March 28, 2000
    Assignee: Ionica International Limited
    Inventors: Richard John Albrow, Simon Alexander Black, Leigh Carter, Rupert Leslie Alexander Goodings, Paul Maxwell Martin, Neil Philip Piercy
  • Method for restricting channel access depending on subscriber classes and system loading
    Patent number: 6038213
    Abstract: The present invention relates to a method of transmitting digital data messages in predetermined time slots within fixed length time frames from at least one of a plurality of subscriber units to a base station for reception, in which, selectively, subscriber units which are members of one or more predetermined classes of subscriber units are restricted from transmitting at least one predetermined type of message. This advantageously helps in avoiding overload of the network. The invention also relates to corresponding communication means.
    Type: Grant
    Filed: May 28, 1997
    Date of Patent: March 14, 2000
    Assignee: Ionica International Limited
    Inventors: Richard John Albrow, Simon Alexander Black, Leigh Carter, Rupert Leslie Alexander Goodings, Paul Maxwell Martin, Neil Philip Piercy
  • Transmission of control messages in digital telephony
    Patent number: 6026083
    Abstract: In a communications network involving transmission of data packets, control messages between nodes are assigned priorities dependent on message type. The allocated of messages to TDM/TDMA time slots is dependent on the assignment priorities.
    Type: Grant
    Filed: May 28, 1997
    Date of Patent: February 15, 2000
    Assignee: Ionica International Limited
    Inventors: Richard John Albrow, Simon Alexander Black, Leigh Carter, Rupert Leslie Alexander Goodings, Paul Maxwell Martin, Neil Philip Piercy
  • Transmission timing control in digital radio telephony
    Patent number: 5987023
    Abstract: In time domain multiplex/time domain multiple access communications between a base station and subscriber unit, the base station sends a timing reference signal. A subscriber unit responds with a data packet (a) sufficiently short to ensure correct reception by the base irrespective of transmission time. The base determines the transmission time taken and instructs the subscriber unit to advance its timings so that longer data packets (b) can be sent so as to be received when expected. The timing adjustment includes both a fixed present component dependent on approximate separation of base station and subscriber unit, and a second component from measurement of the transmission time taken.
    Type: Grant
    Filed: May 23, 1997
    Date of Patent: November 16, 1999
    Assignee: Ionica International, Limited
    Inventors: Richard John Albrow, Simon Alexander Black, Leigh Carter, Rupert Leslie Alexander Goodings, Paul Maxwell Martin, Neil Philip Piercy