Patent ID: 8976777
Filing Date: 2015-03-10
Classification: H03L,H04J

Abstract:
1. A communication device comprising: a communication interface with a packet communication network; a general processor; a radio communication subsystem; an oscillator for generating a reference clock signal of the radio communication subsystem; wherein the communication device also comprises a clock synthesizer for generating the reference clock of the general processor and the reference clock of the radio subsystem from the single oscillator, wherein the communication device stores software intended to be executed by the general processor for synchronizing the reference clock signal of the radio communication subsystem with at least one distant reference source over the packet communication network by: timestamping data packets exchanged between the device and the distant reference source; controlling the frequency of the oscillator; and implementing a time synchronization protocol that generates samples with two values, a first one relating to the stability of the clock and a second relating to the frequency drift, and an algorithm controlling the single oscillator for generating a voltage value from samples issuing from the time synchronization protocol.