Patents by Inventor Philip R. Roberts

Philip R. Roberts 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: 8447349
    Abstract: A communication system reduces set up time for an inter-technology handoff of a multi-mode mobile station (MS) from a source network associated with a first radio frequency (RF) technology to a target network associated with a second RF technology by pre-establishing, prior to a determination to handoff the MS, a registration state of the MS and an authentication of the MS in association with the target network and second RF technology. In order to pre-establish the registration state and authentication, the MS exchanges messaging of the second RF technology with the second network via the first network and first RF technology. To facilitate the exchange, the MS includes shims in a second protocol stack associated with the second technology, which shims intercept second protocol stack signaling and redirect the intercepted signaling to a first protocol stack of the MS, associated with the first technology, for tunneling to the source network.
    Type: Grant
    Filed: February 2, 2009
    Date of Patent: May 21, 2013
    Assignee: Motorola Solutions, Inc.
    Inventors: Peter J. McCann, George Cherian, Poornima A. Lalwaney, Philip R. Roberts
  • Publication number: 20090248841
    Abstract: A method (500) and a system (300) for implementing point-to-point communications. The method can include identifying at least a first portion (348, 350) of a prefix (344, 346) of a network address, the prefix corresponding to a particular topological region (326, 328) of a communications network (302). The method further can include generating a unique prefix (360, 362) by updating the prefix with an identifier (356, 358) that is unique within the topological region of the communications network, and assigning the unique prefix to a node (304-314) of the communications network.
    Type: Application
    Filed: March 28, 2008
    Publication date: October 1, 2009
    Applicant: MOTOROLA, INC.
    Inventors: Paula Tjandra, Anand S. Bedekar, Philip R. Roberts, Ajoy K. Singh
  • Publication number: 20090207808
    Abstract: A communication system reduces set up time for an inter-technology handoff of a multi-mode mobile station (MS) from a source network associated with a first radio frequency (RF) technology to a target network associated with a second RF technology by pre-establishing, prior to a determination to handoff the MS, a registration state of the MS and an authentication of the MS in association with the target network and second RF technology. In order to pre-establish the registration state and authentication, the MS exchanges messaging of the second RF technology with the second network via the first network and first RF technology. To facilitate the exchange, the MS includes shims in a second protocol stack associated with the second technology, which shims intercept second protocol stack signaling and redirect the intercepted signaling to a first protocol stack of the MS, associated with the first technology, for tunneling to the source network.
    Type: Application
    Filed: February 2, 2009
    Publication date: August 20, 2009
    Applicant: MOTOROLA, INC.
    Inventors: Peter J. McCann, George Cherian, Poornima A. Lalwaney, Philip R. Roberts
  • Patent number: 6512776
    Abstract: A first data stream (26) requested by a first client (1) is received at a router (16). A second data stream (24) requested by a second client (2) is also received at the router (16). The router (16) determines that the first data stream (26) and the second data stream (24) are identical. The router (16) multicasts the first data stream (26) and the second data stream (24) into a single multicast data stream (28). The single multicast data stream (28) is transmitted to the first client (1) and to the second client (2).
    Type: Grant
    Filed: June 15, 1998
    Date of Patent: January 28, 2003
    Assignee: Motorola, Inc.
    Inventors: Wesley Stuart Jones, Philip R. Roberts
  • Patent number: 5163156
    Abstract: Control of communication by a plurality of devices, such as computer programs and terminals, via a computer is controlled by an arrangement referred to as a connector. The connector receives a request for communication defining the devices to the communication and, in response to the request, establishes a mapping table defining the source devices and destination devices to the connection. A source device stores data in connector memory and the connector reads the mapping table to determine the destination devices for the stored data. The connector then creates a linked list coupling structure between the stored data and the determined destination devices. The destination devices issue read commands to which the connector responds by reading the stored data in accordance with the coupling structure and providing that data to the requesting device.
    Type: Grant
    Filed: March 16, 1990
    Date of Patent: November 10, 1992
    Assignee: AT&T Bell Laboratories
    Inventors: Wu-Hon F. Leung, Gottfried W. R. Luderer, Michael J. Morgan, Philip R. Roberts, Shi-Chuan Tu