The term iBeacon and Beacon are often used interchangeably. iBeacon is the name for Apple’s technology standard, which allows Mobile Apps (running on both iOS and Android devices) to listen for signals from beacons in the physical world and react accordingly. (The information is taken from www.ibeacon.com)
iBeacon is broadcasting a signal to a cellphone.
Near Field Communication (NFC) operates within 20 cm; however, Beacon technology has a far greater range of 50 m. Beacons, which is a low-cost piece of hardware, can be attached to a wall or countertop. Then the Beacon hardware devices broadcast their identities to nearby electronic devices such as a smartphone or tablet. According to Wikipedia, Beacons is a device which has a 1-way transmitter for sending a signal to smartphone or receiving device. Bluetooth beacons uses Bluetooth low energy proximity sensing to transmit a universally unique identifier picked up by a compatible app or operating system. What is iBeacon: Animated Guide
Beacon technology allows publishers, retailers, and branding companies to market their products and connect with consumers, but Beacon technology can be used for helping persons with disabilities. For example, Beacon technology works just like the Global Positioning System (GPS) and can be used as an indoor positioning system to determine someone’s approximate location. A specific app may need to be installed on your smartphone to interact with Beacon devices for a specific location (i.e. ClickAndgo). As the Beacon hardware is implemented more widely in cities, schools, and public transportation systems, it will help all travelers learn their surroundings without needing to ask a stranger for directions and assist persons with disabilities to travel independently.
ClickAndGo iBeacons Wayfinding
In addition, Beacon technology can be used to monitor the conditions and the safety of persons with disabilities or the elderly. Here are a few examples.
Beacon Technology Demo (by CLO Kansas)