Sniffing Out the Correct Physical Layer Capture Model in 802.11b
ICNP '04 Proceedings of the 12th IEEE International Conference on Network Protocols
A Multi-Radio Unification Protocol for IEEE 802.11 Wireless Networks
BROADNETS '04 Proceedings of the First International Conference on Broadband Networks
Idle sense: an optimal access method for high throughput and fairness in rate diverse wireless LANs
Proceedings of the 2005 conference on Applications, technologies, architectures, and protocols for computer communications
Self-management in chaotic wireless deployments
Proceedings of the 11th annual international conference on Mobile computing and networking
XORs in the air: practical wireless network coding
Proceedings of the 2006 conference on Applications, technologies, architectures, and protocols for computer communications
Distributed channel management in uncoordinated wireless environments
Proceedings of the 12th annual international conference on Mobile computing and networking
PPR: partial packet recovery for wireless networks
Proceedings of the 2007 conference on Applications, technologies, architectures, and protocols for computer communications
A case for adapting channel width in wireless networks
Proceedings of the ACM SIGCOMM 2008 conference on Data communication
Learning to share: narrowband-friendly wideband networks
Proceedings of the ACM SIGCOMM 2008 conference on Data communication
Zigzag decoding: combating hidden terminals in wireless networks
Proceedings of the ACM SIGCOMM 2008 conference on Data communication
White space networking with wi-fi like connectivity
Proceedings of the ACM SIGCOMM 2009 conference on Data communication
Understanding cross-band interference in unsynchronized spectrum access
Proceedings of the 2009 ACM workshop on Cognitive radio networks
Frequency-aware rate adaptation and MAC protocols
Proceedings of the 15th annual international conference on Mobile computing and networking
Glia: a practical solution for effective high datarate wifi-arrays
Proceedings of the 15th annual international conference on Mobile computing and networking
Fine-grained channel access in wireless LAN
Proceedings of the ACM SIGCOMM 2010 conference
Supporting demanding wireless applications with frequency-agile radios
NSDI'10 Proceedings of the 7th USENIX conference on Networked systems design and implementation
Achieving single channel, full duplex wireless communication
Proceedings of the sixteenth annual international conference on Mobile computing and networking
The spaces between us: setting and maintaining boundaries in wireless spectrum access
Proceedings of the sixteenth annual international conference on Mobile computing and networking
WiFi-Nano: reclaiming WiFi efficiency through 800 ns slots
MobiCom '11 Proceedings of the 17th annual international conference on Mobile computing and networking
Practical, real-time, full duplex wireless
MobiCom '11 Proceedings of the 17th annual international conference on Mobile computing and networking
Fine-grained spectrum adaptation in WiFi networks
Proceedings of the 19th annual international conference on Mobile computing & networking
CSpy: finding the best quality channel without probing
Proceedings of the 19th annual international conference on Mobile computing & networking
Mobile Networks and Applications
AirSync: enabling distributed multiuser MIMO with full spatial multiplexing
IEEE/ACM Transactions on Networking (TON)
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The quest for higher data rates in WiFi is leading to the development of standards that make use of wide channels (e.g., 40MHz in 802.11n and 80MHz in 802.11ac). In this paper, we argue against this trend of using wider channels, and instead advocate that radios should communicate over multiple narrow channels for efficient and fair spectrum utilization. We propose WiFi-NC, a novel PHY-MAC design that allows radios to use WiFi over multiple narrow channels simultaneously. To enable WiFi-NC, we have developed the compound radio, a single wideband radio that exposes the abstraction of multiple narrow channel radios, each with independent transmission, reception and carrier sensing capabilities. The architecture of WiFi-NC makes it especially suitable for use in white spaces where free spectrum may be fragmented. Thus, we also develop a frequency band selection algorithm for WiFi-NC making it suitable for use in white spaces. WiFi-NC has been implemented on an FPGA-based software defined radio platform. Through real experiments and simulations, we demonstrate that WiFi-NC provides better efficiency and fairness in both common WiFi as well as future white space scenarios.