US Patent 12116240 Destination calls across multiple elevator groups

An elevator system includes a first elevator group controller configured to control a first elevator car of a first elevator group; a second elevator group controller configured to control a second elevator car of a second elevator group, the second elevator group controller in bi-directional communication with the first elevator group controller; a destination entry device configured to receive a destination call from a passenger, the destination call identifying a source floor and a destination floor; at least one of the first elevator group controller and the second elevator group controller determining that a journey from the source floor to the destination floor requires a first phase utilizing the first elevator group and a second phase utilizing the second elevator group; at least one of the first elevator group controller and the second elevator group controller allocating the first elevator car and allocating the second elevator car.