Thomas David Perry

Address:

620 Frst Hl Dr, Coppell, TX 75019

Phone:

2146747201

VIN:

2FMDK39C87BB27772

Make:

FORD

Model:

EDGE

Year:

2007

US Patent:

8310983, Nov 13, 2012

Filed:

Jan 13, 2010

Appl. No.:

12/686442

Inventors:

Peter D. Novak - Keller TX, US
Thomas G. Perry - Fort Worth TX, US
Dale E. Ray - Fort Worth TX, US

Assignee:

Motorola Mobility LLC - Libertyville IL

International Classification:

H04B 7/212

US Classification:

370324, 370315, 370319, 370503, 375215, 375294

Abstract:

A method and apparatus for performing time synchronization is provided. The method/apparatus includes, at a radio subsystem: receiving, from a digital subsystem, a first signal via the link, where the link not dedicated to timing synchronization; determining a time difference between the first signal and a second signal; converting the time difference to a time error, sending, via the link, the time error or time difference to the digital subsystem. The method further includes, at the digital subsystem, inputting the time error, received from the radio subsystem, to a phased locked loop (PLL) in order to adjust an oscillator frequency so as to reduce the amount of the time error and thus synchronizing the radio access network with the second signal received at the radio subsystem, without the need for an additional connection between the digital and radio subsystems.

US Patent:

D2982633, Oct 25, 1988

Filed:

Aug 16, 1984

Appl. No.:

6/641286

Inventors:

Thomas G. Perry - Memphis TN
Gloria Perry - Memphis TN

US Classification:

D19 42

US Patent:

58093974, Sep 15, 1998

Filed:

Feb 29, 1996

Appl. No.:

8/608914

Inventors:

Andrew Holloman Harthcock - Keller TX
Soeren Henrik Thomsen - North Richland Hills TX
Anselm Irenius Sequeira - Keller TX
Thomas Glenn Perry - Fort Worth TX

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04B 719
H04B 106

US Classification:

455 132

Abstract:

A selective call messaging system comprises a control point satellite uplink (24) for transmission of source information to a satellite (12), the source information having timing information, a base station (16) for receiving the source information from the satellite and for retransmitting the source information to a receiver 18. A synchronization controller 29 is coupled to the receiver 18 and remotely coupled to the control point satellite uplink. The synchronization controller comprises a decoder (40) for decoding the timing information received from the base station to provide actual timing information, an absolute time source (28) that generates a reference time, a comparator (42) for comparing the actual timing information with the reference time to provide an offset signal (44) and a transmitter for forwarding the offset signal to the control point satellite uplink to adjust timing information at the control point satellite uplink.