Dual rate communication protocol

  • US 5,954,775 A
  • Filed: 02/05/1997
  • Issued: 09/21/1999
  • Est. Priority Date: 02/05/1997
  • Status: Expired due to Term
First Claim
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1. In a supplemental restraint system having means for acquiring data on occupant presence and/or occupant position and a communication system for communicating such data to a control circuit, a method of accommodating communication of occupant presence data and/or occupant position data at different rates over a common communication link comprising the steps of:

  • establishing a series of message rate intervals on the common communication link;

    devoting a first portion of each message rate interval to occupant presence data and reserving a second portion of each message rate interval for occupant position data;

    the first portion being sufficient to accommodate only a fragment of a complete transmission of occupant presence data thereby requiring a series of message rate intervals for a complete transmission of occupant presence data;

    establishing an occupant position message rate sufficient to accommodate a complete transmission of occupant position data within the second portion of each message rate interval; and

    transmitting the occupant presence and/or occupant position data in the respective portion of each message rate interval.

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