The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 23, 1997
Filed:
Mar. 31, 1994
William V Luitje, Ann Arbor, MI (US);
Chrysler Corporation, Auburn Hills, MI (US);
Abstract
Microcontrollers, e.g. those located within a vehicle or factory, are connected over a local area network (LAN). The microcontrollers broadcast messages on the LAN tagged with an identifier (ID) which identifies the contents of the message, rather than a destination address. Microcontrollers on the network are provided with read only memory (ROM) containing a table of message IDs and accompanying data, wherein the table address of each message ID was initially determined by applying a hash function to the ID. Upon receipt of a message, a microcontroller applies the hash function to the message ID. Using the result as a pointer into the table, the microcontroller compares the message ID stored in that pointer location with the received message ID. If they are equal, the microcontroller performs a predetermined function. If the message IDs are not equal, the message is ignored.