At Tipperary Institute we have a number of projects that are facilitating the elderly.
In Singapore they have now developed a bluetooth enabled shirt. The shirt has been fitted with a 2cm x 2cm sensor that signals loved ones when the wearer is moving at great speeds horizontally. If the person falls, the device transmits, via Bluetooth, to a nearby computer or cellphone and alerts those designated
In the future I can see them using ultrawideband as it possess better geo spatial tracking and power consumption.
The life-saving Bluetooth shirt sensor