Beacon

During This year's World Mobile Congress Nokia introduced several enhancements to its in-home Wi-Fi solution. This follows the acquisitions  of  Unium, a US-based software company that specializes in mission-critical and residential Wi-Fi applications.  The new Wi-Fi solution expands Nokia's portfolio with meshed Wi-Fi gateways and beacons the offer intelligent Wi-Fi signal management that maintains signal strenght and bandwith.

I remember growing up we had a television that could switch on using just sounds, we found it hilarious that in addition to the device supplied, a hand clap or even someone with a high pitch voice cold do the trick. Those TVs might still be around but time has moved on, we now have many more options including proximity.