Receiver-initiated busy-tone multiple access in packet radio networks
SIGCOMM '87 Proceedings of the ACM workshop on Frontiers in computer communications technology
Digital Communication Receivers: Synchronization, Channel Estimation, and Signal Processing
Digital Communication Receivers: Synchronization, Channel Estimation, and Signal Processing
Reconsidering wireless systems with multiple radios
ACM SIGCOMM Computer Communication Review
Fundamentals of wireless communication
Fundamentals of wireless communication
Performance Enhancement of Multirate IEEE 802.11 WLANs with Geographically Scattered Stations
IEEE Transactions on Mobile Computing
Datalink streaming in wireless sensor networks
Proceedings of the 4th international conference on Embedded networked sensor systems
802.11 Wireless Networks: The Definitive Guide, Second Edition
802.11 Wireless Networks: The Definitive Guide, Second Edition
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
Sora: high performance software radio using general purpose multi-core processors
NSDI'09 Proceedings of the 6th USENIX symposium on Networked systems design and implementation
Cross-layer wireless bit rate adaptation
Proceedings of the ACM SIGCOMM 2009 conference on Data communication
Fine-grained channel access in wireless LAN
Proceedings of the ACM SIGCOMM 2010 conference
Achieving single channel, full duplex wireless communication
Proceedings of the sixteenth annual international conference on Mobile computing and networking
CSMA/CN: carrier sense multiple access with collision notification
Proceedings of the sixteenth annual international conference on Mobile computing and networking
Strider: automatic rate adaptation and collision handling
Proceedings of the ACM SIGCOMM 2011 conference
4G: LTE/LTE-Advanced for Mobile Broadband
4G: LTE/LTE-Advanced for Mobile Broadband
E-MiLi: energy-minimizing idle listening in wireless networks
MobiCom '11 Proceedings of the 17th annual international conference on Mobile computing and networking
LEAD: leveraging protocol signatures for improving wireless link performance
Proceeding of the 11th annual international conference on Mobile systems, applications, and services
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Retransmissions reduce the efficiency of data communication in wireless networks because of: (i) per-retransmission packet headers, (ii) contention overhead on every retransmission, and (iii) redundant bits in every retransmission. In fact, every retransmission nearly doubles the time to successfully deliver the packet. To improve spectrum efficiency in a lossy environment, we propose a new in-frame retransmission scheme using uACKs. Instead of waiting for the entire transmission to end before sending the ACK, the receiver sends smaller uACKs for every few symbols, on a separate narrow feedback channel. Based on these uACKs, the sender only retransmits the lost symbols after the last data symbol in the frame, thereby adaptively changing the frame size to ensure it is successfully delivered. We have implemented uACK on the Sora platform. Experiments with our prototype validate the feasibility of symbol-level uACK . By significantly reducing the retransmistion overhead, the sender is able to aggressively use higher data rate for a lossy link. Both improve the overall network efficiency. Our experimental results from a controlled environment and an 9-node software radio testbed show that uACK can have up to 140% throughput gain over 802.11g and up to 60% gain over the best known retransmission scheme.