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Device for synchronizing a time base for V2V communictation

  • US 9,300,423 B2
  • Filed: 03/28/2013
  • Issued: 03/29/2016
  • Est. Priority Date: 04/24/2012
  • Status: Active Grant
First Claim
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1. A device of manufacture for sending and receiving vehicle-to-vehicle (V2V) safety messages, in a V2V communication system, comprising a transceiver in a subject vehicle wherein the transceiver is configured to wirelessly broadcast and receive messages comprising a protocol comprising:

  • a synchronized time base used by all V2V transceivers in the V2V communication system;

    a basic time interval, of a predetermined duration, repeating continuously and contiguously, responsive to the synchronized time base;

    n contiguous time slots, of a predetermined duration, enumerated from 1 to n, wherein the basic time interval comprises the n time slots;

    wherein at least some messages are transmitted in a time-division, multiple-access (TDMA) protocol comprising the basic time interval and the time slots;

    an algorithm for self-selecting a selected time slot by the V2V transceiver;

    an internal time base synchronization function;

    wherein the time base synchronization function is responsive to (i) a global positioning satellite transmission;

    (ii) an internal clock;

    and (iii) a plurality of valid transmissions received from a plurality of similar transceivers in other vehicles within wireless communication range; and

    wherein the time base synchronization function adjusts the synchronized time base such that it is synchronized with the V2V transceivers in the V2V communication system.

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