Patents by Inventor Christopher Scholefield

Christopher Scholefield 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: 6216006
    Abstract: A method for allowing new traffic on a wireless data network. A service request is received from a mobile station (100). An effective bandwidth of the service request is estimated (110) using a recursive estimator (400). If there is enough surplus capacity on the wireless data network to accommodate the service request, the service request is granted. In response, a discrete adjustment, based on the effective bandwidth, is applied (160) to the recursive estimator (400).
    Type: Grant
    Filed: October 31, 1997
    Date of Patent: April 10, 2001
    Assignee: Motorola, Inc.
    Inventors: Christopher Scholefield, Theodore Ono-Tesfaye
  • Patent number: 5752193
    Abstract: The disclosed system is capable of allocating plural subchannels based on user data priority. In one embodiment, after receiving a system parameters such as a current priority level from a base station, a subscriber determines whether to send an access request for plural subchannels. Upon receipt of the access request(s), the system determines from the access request(s) whether to allocate the subchannel(s) to the subscriber. Further access requests are received periodically and scheduled, and when a higher priority message is received, completion of a lower priority message is deferred and the higher priority request allocated. Thus, an improved access procedure is provided accommodating multiple priority requests in an efficient manner. In a further embodiment, the system parameters include persistence/probability values for each service priority level, and each transmitting unit applies the appropriate value for the data priority to be sent in determining when to send an access request.
    Type: Grant
    Filed: September 1, 1995
    Date of Patent: May 12, 1998
    Assignee: Motorola, Inc.
    Inventors: Christopher Scholefield, Ronald H. Gerhards
  • Patent number: 5742592
    Abstract: The disclosed system is capable of allocating plural subchannels based on user data priority. In one embodiment, a subscriber determines the throughput it would like and fragments a data packet in that number of service data units, and requests that number of subchannel allocations from a serving base station. Upon receipt of the access request(s), including any priority indicators, the system determines from the access request(s) whether to allocate the subchannel(s) to the subscriber. Further access requests are received periodically and scheduled, and when a higher priority message is received, completion of a lower priority message is deferred and the higher priority request allocated. Thus, an improved access procedure is provided accommodating varying throughput rates with a more robust transfer because of the packet fragmentation and multiple-subchannel transfer.
    Type: Grant
    Filed: September 1, 1995
    Date of Patent: April 21, 1998
    Assignee: Motorola, Inc.
    Inventors: Christopher Scholefield, Ronald H. Gerhards
  • Patent number: 5530913
    Abstract: A method of data message delivery for single frequency reuse data communications systems wherein the system after attempting a data message delivery on a reuse path and detecting an absence of a data message confirmation reattempts the data message delivery on a non-reuse path where the non-reuse path is successively selected as one of; the reuse path in a non-reuse mode, a last used path, and a registered, as determined by a portable, path.
    Type: Grant
    Filed: November 2, 1992
    Date of Patent: June 25, 1996
    Assignee: Motorola, Inc.
    Inventor: Christopher Scholefield
  • Patent number: 5410752
    Abstract: A method and apparatus for combining multiple MFR subnetworks (15) and SFR subnetworks (17) to provide seamless data communications throughout a geographic area (13) wherein a portable station (61) receives a first data message stream (101) for a first time period (153) that exceeds a retransmission interval (115) and under appropriate data path quality conditions monitors a second data message stream (121 ) for a second time period (155) that is less than the retransmission interval (115) to identify alternative data paths with acceptable quality conditions that may be used for further data message delivery to the portable station (61 ).
    Type: Grant
    Filed: September 30, 1992
    Date of Patent: April 25, 1995
    Inventor: Christopher Scholefield