Effect of Hidden Terminals on the Performance of IEEE 802.11 MAC Protocol
LCN '98 Proceedings of the 23rd Annual IEEE Conference on Local Computer Networks
Jigsaw: solving the puzzle of enterprise 802.11 analysis
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Using emulation to understand and improve wireless networks and applications
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A case for adapting channel width in wireless networks
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Cross-layer wireless bit rate adaptation
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Fine-grained channel access in wireless LAN
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Side channel: bits over interference
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WiFi-Nano: reclaiming WiFi efficiency through 800 ns slots
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Symphony: cooperative packet recovery over the wired backbone in enterprise WLANs
Proceedings of the 19th annual international conference on Mobile computing & networking
DOMINO: relative scheduling in enterprise wireless LANs
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Unlike their cellular counterparts, Wi-Fi networks do not have the luxury of a dedicated control plane that is decoupled from the data plane. Consequently, Wi-Fi struggles to provide many of the capabilities that are taken for granted in cellular networks, including efficient and fair resource allocation, QoS and handoffs. The reason for the lack of a control plane with designated spectrum is that it would impose significant overhead. This is at odds with Wi-Fi's goal of providing a simple, plug-and-play network. In this paper we present Flashback, a novel technique that provides a decoupled low overhead control plane for wireless networks that retains the simplicity of Wi-Fi's distributed asynchronous operation. Flashback allows nodes to reliably send short control messages concurrently with data transmissions, while ensuring that data packets are decoded correctly without harming throughput. We utilize Flashback's novel messaging capability to design, implement and experimentally evaluate a reliable control plane for Wi-Fi with rates from 175Kbps to 400Kbps depending on the environment. Moreover, to demonstrate its broad applicability, we design and implement a novel resource allocation mechanism that utilizes Flashback to provide efficient, QoS-aware and fair medium access, while eliminating control overheads including data plane contention, RTS/CTS and random back offs.