In a common bus control method of a distributed arbitration in which a contention between bus usage requests from a plurality of units connected to a common bus is arbitrated by each unit by use of an identifier representing a priority level and assigned thereto, unit identifiers are dynamically exchanged...http://www.google.fr/patents/US5034881?utm_source=gb-gplus-shareBrevet US5034881 - Method of and system for controlling common bus
