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2007
IEEE

Disruption-Tolerant Link-level Mechanisms for Extreme Wireless Network Environments

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Disruption-Tolerant Link-level Mechanisms for Extreme Wireless Network Environments
— Wireless links pose significant challenges in terms of achievable goodput and residual loss-rate. Our recent enhancements, called LT-TCP make TCP loss-tolerant in heavy/bursty erasure environments. Link-level protocols mitigate these problems by using a combination of FEC and ARQ but are insufficient when the channel experiences disruptions. When the underlying source of loss is interference (e.g., 802.11 environments), MAC-level mechanisms misinterpret interference as noise leading to poor scheduling (e.g., capture effects) and limit the benefit of transport layer mitigation efforts. We propose enhancements to link-level protocols that enable survival during disruptions. We explore an adaptive link-level strategy to export a small residual loss rate and bounded latency under high loss/ disruption conditions. We evaluate the proposed link-level enhancements, showing that the combination with LTTCP helps achieve significant end-to-end performance gains. We also demonstrate the t...
Vijaynarayanan Subramanian, K. K. Ramakrishnan, Sh
Added 02 Jun 2010
Updated 02 Jun 2010
Type Conference
Year 2007
Where COMSWARE
Authors Vijaynarayanan Subramanian, K. K. Ramakrishnan, Shivkumar Kalyanaraman
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