Sep 30, 2010: Passive Wireless Nodes for Transparent eHome Services
It is envisioned that the future smart home will have many 10’s or 100’s of wireless devices. Many of these devices will be low power, low complexity nodes to monitor security or environmental parameters. Changing the batteries in these devices or replacing them will be tedious and inconvenient. One solution is to use passive nodes, powered using energy scavenged from the wireless signal they receive from an access point designed to query the passive nodes. TRLabs has developed a passive node prototype for home security applications employing smart antenna beam-forming techniques.