The proliferation of a wide range of wireless devices operating in the 
crowded 2.4 GHz ISM band is becoming a major challenge for emerging low-power 
wireless networks in indoor applications. Recent studies show that Cross 
Technology Interference (CTI) can significantly reduce the overall delivery 
ratio of such networks. CTI subsequently decreases the network performance and 
drains their scarce resources of radio spectrum and energy. In this work, we 
present the design and preliminary evaluation results of an energy-efficient 
packet recovery mechanism that exploits (i) physical layer information 
available by 802.15.4-compliant radios and (ii) time diversity of wireless 
channel, to mitigate cross technology interference effects on low-power 
wireless networks.