A geographical zone, which can be multi-dimensional, such as in three dimensions, can be utilized to regulate the location of a movable user within the geographical zone. A mobile device associated with a user located in a specific area of a geographical zone is in communication at least one node, which is, in turn, in communication with at least one control center. Detailed local information from the location nodes is downloaded. The nodes communicate with each other wirelessly via radio frequency (RF) using Bluetooth™ protocol. Mobile devices interact with location nodes that are in communication range. A messaging system is used to send emergency and security communications to users associated with mobile devices in particular locations.