Low-power wireless devices suffer notoriously from
Cross-Technology Interference (CTI). To enable co-existence,
researchers have proposed a variety of interference mitigation
strategies. Existing solutions, however, are designed to work with
the limitations of currently available radio chips. In this paper,
we investigate how to exploit physical layer properties of 802.15.4
signals to better address CTI. We present CrossZig, a cross-layer
solution that takes advantage of physical layer information and
processing to improve low-power communication under CTI. To
this end, CrossZig utilizes physical layer information to detect
presence of CTI in a corrupted packet and to apply an adaptive
packet recovery which incorporates a novel cross-layer based
packet merging and an adaptive FEC coding. We implement
a prototype of CrossZig for the low-power IEEE 802.15.4 in
a software-defined radio platform. We show the adaptability
and the performance gain of CrossZig through experimental
evaluation considering both micro-benchmarking and system
performance under various interference patterns. Our results
demonstrate that CrossZig can achieve a high accuracy in error
localization (94.3% accuracy) and interference type identification
(less than 5% error rate for SINR ranges below 3 dB). Moreover,
our system shows consistent performance improvements under
interference from various interfering technologies.