An elevator control system employing a micro-processor-based group controller (FIG. 2), which communicates with the cars (3, 4) of the system to determine the conditions of the cars, and responds to hall calls registered at a plurality of landings in the building serviced by the cars under control of...http://www.google.de/patents/US5022497?utm_source=gb-gplus-sharePatent US5022497 - "Artificial intelligence" based crowd sensing system for elevator car assignment
