System and method for controlling the access to a networked control system

A system for controlling the access to a networked control system having transmission channel(s), the system comprising:

• a first central controller located entirely within a first particular delimited space, wherein a plurality of devices within the first particular delimited space are connected to the same network via the first central controller, and further wherein the first central controller is configured to control the plurality of devices;
• a second central controller located entirely within a second particular delimited space, wherein a plurality of devices within the second particular delimited space are connected to the same network via the second central controller, and further wherein the second central controller is configured to control the plurality of devices;
• a router in communication with the first and second central controllers;
• a first transmitter device located within the first particular delimited space and in communication with the first central controller, wherein the first transmitter device is configured to transmit access information for access to the plurality of devices within the first particular delimited space over a range restricted transmission channel differing from the transmission channel(s) of the networked control system and in a manner that substantially limits the reception of the access information to the first particular delimited space, wherein the first transmitter device is further configured to change the access information transmitted within the first particular delimited space, and wherein the access information comprises a first access identifier for obtaining access for controlling one or more of the devices in the first particular delimited space;
• a second transmitter device located within the second particular delimited space and in communication with the second central controller, wherein the second transmitter device is configured to transmit access information for access to the plurality of devices within the second particular delimited space over a range restricted transmission channel differing from the transmission channel(s) of the networked control system and in a manner that substantially limits the reception of the access information to the second particular delimited space, wherein the second transmitter device is further configured to change the access information transmitted within the second particular delimited space, and wherein the access information comprises a second access identifier for obtaining access for controlling one or more of the devices in the second particular delimited space;
• and
• a portable receiver device configured to receive transmitted access information by direct access from the first transmitter device when the receiver device is located within the first particular delimited space or from the second transmitter device when the receiver device is located within the second particular delimited space, and further configured to access the first and second central controllers through wireless access to the router, and further configured to control at least one of the plurality of first devices assigned to the first particular delimited space using the first access identifier when the portable receiver device is located within the first particular delimited space, and further configured to control at least one of the plurality of second devices assigned to the second particular delimited space using the second access identifier when the portable receiver device is located within the second particular delimited space.