Queued access of common communications link with expanded...

Details Queued access of common communications link with expanded... Queued access of common communications link with expanded...

G - Physics

06

F

354/234

G06F 13/42 (2006.01)

Patent

CA 1233263

QUEUED ACCESS OF COMMON COMMUNICATIONS LINK WITH EXPANDED ADDRESSING AND ERROR CHECKING PROTOCOL ABSTRACT OF THE DISCLOSURE An arrangement for providing a multi-level access bus protocol utilizing a dynamically established bus access timing relationship for a plurality of devices competing for the use of a common data line. Bus access timing changes with the occurrence of successes and failures in attempts to access the data line to provide a deterministic communication scheme in a bus topology. Further aspects of the invention include the use of a modified checksum to avoid the transmission of homogeneous (all same binary value bits) data packets on the data line; means for dynamically establishing the end of a variable length data packet, an addressing scheme permitting universal and family addressing of all devices on the data line; and a means for providing message-type prioritization.

472834

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