Remote entry transmitter with transmission identification codes

• US 20020024417A1
• Filed: 07/25/2001
• Published: 02/28/2002
• Est. Priority Date: 08/24/2000
• Status: Active Grant

• Current Assignee: Continental Automotive Systems, Inc. (Continental AG)
• Original Assignee: Siemens VDO Automotive Corporation (Siemens AG)
• Inventors: Morrison, Brian, Reimus, David, Ostrander, Gerald L., Epp, Jacob G., Banas, Patrick A.
• Granted Patent: US 7,129,815 B2
• Time in Patent Office: Days
• US Class Current: 340/5.25
• CPC Class Codes: B60R 25/24 using electronic identifiers containing a code not memorised by the user
• CPC Class Codes: G07C 2009/00253 dynamically, e.g. variable code - rolling code
• CPC Class Codes: G07C 2009/00793 by Hertzian waves
• CPC Class Codes: G07C 9/00182 operated with unidirectional data transmission between data carrier and locks
• CPC Class Codes: G07C 9/00309 operated with bidirectional data transmission between data carrier and locks
• CPC Class Codes: G07C 9/00857 where the code of the data carrier can be programmed

Abstract

A transmitter identification code is designed such that the code varies as the code is assigned. In one embodiment the code will include information with regard to the date and time that the code is initially determined. In a second embodiment the code is provided by incrementing a counter, and then modifying that counter information such that the final code is non-sequential.

Claims

1. A method of assigning an identification code to a remote entry transmitter comprising the steps of:

1) providing a number which varies by the time a code is assigned relative to other codes, and ensuring that the codes are non-sequential for codes assigned sequentially; and

2) storing said code in a remote entry transmitter.

2. A method as set forth in claim 1, wherein said code is determined by incorporating the date and time that the code is set into the code itself.

3. A method as set forth in claim 2, wherein the said code also incorporates information with regard to the particular assembly line.

4. A method as set forth in claim 1, wherein said code is identified by initially sequentially incrementing a counter, and then modifying the counter number with another operation such that the final number is no longer sequential.

5. A method as set forth in claim 4, wherein the counter numbers are provided in an EXCLUSIVE OR operation with a bit pattern such that the final code output is non-sequential.

6. A remote entry transmitter comprising:

a transmitter body having a switch for requesting a vehicle component to perform an operation; and

a transmitter for transmitting a code, said code incorporating information which is both non-sequential, and yet which varies in order of the time the code was determined.