Jeremy T Yoder

US Patent:

6496885, Dec 17, 2002

Filed:

Jul 14, 1999

Appl. No.:

09/354345

Inventors:

David Charles Smart - Waterloo IA
Jerry Norman Kitchen - Cedar Falls IA
Jeremy T. Yoder - Cedar Rapids IA

Assignee:

Deere Company - Moline IL

International Classification:

G06F 1300

US Classification:

710100, 710 52

Abstract:

A network includes a plurality of electronic control units (ECU) connected with each other and receiving messages via a bus, each message having an identifier portion and a data portion. An ECU processes messages by converting the message identifier to a hash value, comparing the hash value to a plurality of index values stored in a lookup table, the lookup table having relevance values corresponding to each index value, discarding the message if a corresponding relevance value indicates that the message is not relevant to the ECU, inserting the message into memory buffer if a corresponding relevance value indicates that the message is relevant to the ECU, and further processing only selected ones of the messages in the buffer. Preferably, the hash value has fewer data bits than that of the identifier portion of the messages, and the number of unique hash values is the same as a number of index values. The number, N, of index values for the lookup table is determined by selecting from a plurality of potential values for N, a particular N value which minimizes a number of non-relevant messages received by the ECU.