Measurement-based characterization of 802.11 in a hotspot setting
Proceedings of the 2005 ACM SIGCOMM workshop on Experimental approaches to wireless network design and analysis
Measurement-based models of delivery and interference in static wireless networks
Proceedings of the 2006 conference on Applications, technologies, architectures, and protocols for computer communications
ICN '07 Proceedings of the Sixth International Conference on Networking
Understanding and mitigating the impact of RF interference on 802.11 networks
Proceedings of the 2007 conference on Applications, technologies, architectures, and protocols for computer communications
Interference Detection and Mitigation in IEEE 802.15.4 Networks
IPSN '08 Proceedings of the 7th international conference on Information processing in sensor networks
Performance Evaluation of IEEE 802.15.4 Beacon-Enabled Association Process
AINAW '08 Proceedings of the 22nd International Conference on Advanced Information Networking and Applications - Workshops
Experimental Study of the Impact of WLAN Interference on IEEE 802.15.4 Body Area Networks
EWSN '09 Proceedings of the 6th European Conference on Wireless Sensor Networks
Minimizing 802.11 interference on ZigBee medical sensors
BodyNets '09 Proceedings of the Fourth International Conference on Body Area Networks
Metronome: coordinating spectrum sharing in heterogeneous wireless networks
COMSNETS'09 Proceedings of the First international conference on COMmunication Systems And NETworks
Surviving wi-fi interference in low power ZigBee networks
Proceedings of the 8th ACM Conference on Embedded Networked Sensor Systems
Beyond co-existence: Exploiting WiFi white space for Zigbee performance assurance
ICNP '10 Proceedings of the The 18th IEEE International Conference on Network Protocols
Enabling coexistence of heterogeneous wireless systems: case for ZigBee and WiFi
MobiHoc '11 Proceedings of the Twelfth ACM International Symposium on Mobile Ad Hoc Networking and Computing
MAC protocols for wireless sensor networks: a survey
IEEE Communications Magazine
ZIMO: building cross-technology MIMO to harmonize zigbee smog with WiFi flash without intervention
Proceedings of the 19th annual international conference on Mobile computing & networking
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The unlicensed ISM spectrum is getting crowded by wireless local area network (WLAN) and wireless personal area network (WPAN) users and devices. Spectrum sharing within the same network of devices can be arbitrated by existing MAC protocols, but the coexistence between WPAN and WLAN (e.g., ZigBee and WiFi) remains a challenging problem. The traditional MAC protocols are ineffective in dealing with the disparate transmit-power levels, asynchronous time-slots, and incompatible PHY layers of such heterogeneous networks. Recent measurement studies have shown moderate-to-high WiFi traffic to severely impair the performance of coexisting ZigBee. We propose a novel mechanism, called cooperative carrier signaling (CCS), that exploits the inherent cooperation among ZigBee nodes to harmonize their coexistence with WiFi WLANs. CCS employs a separate ZigBee node to emit a carrier signal (busy tone) concurrently with the desired ZigBee's data transmission, thereby enhancing the ZigBee's visibility to WiFi. It employs an innovative way to concurrently schedule a busy tone and a data transmission without causing interference between them. We have implemented and evaluated CCS on the TinyOS/MICAz and GNURadio/USRP platforms. Our extensive experimental evaluation has shown that CCS reduces collision between ZigBee and WiFi by 50% for most cases, and by up to 90% in the presence of a high-level interference, all at negligible WiFi performance loss.