A digital fountain approach to reliable distribution of bulk data
Proceedings of the ACM SIGCOMM '98 conference on Applications, technologies, architectures, and protocols for computer communication
MSWIM '01 Proceedings of the 4th ACM international workshop on Modeling, analysis and simulation of wireless and mobile systems
Bandwidth tradeoff between TCP and link-level FEC
Computer Networks: The International Journal of Computer and Telecommunications Networking
Reliable multicast: where to use FEX
PfHSN '96 Proceedings of the TC6 WG6.1/6.4 Fifth International Workshop on Protocols for High-Speed Networks V
TCP Boston: A Fragmentation-Tolerant TCP Protocol for ATM Networks
INFOCOM '97 Proceedings of the INFOCOM '97. Sixteenth Annual Joint Conference of the IEEE Computer and Communications Societies. Driving the Information Revolution
Analysis of link-level hybrid FEC/ARQ-SR for wireless links and long-lived TCP traffic
Performance Evaluation - Selected papers from the first workshop on modeling and optimization in mobile, ad hoc and wireless networks (WiOpt'2003)
LT-TCP: end-to-end framework to improve TCP performance over networks with lossy channels
IWQoS'05 Proceedings of the 13th international conference on Quality of Service
Complementing TCP Congestion Control with Forward Error Correction
NETWORKING '09 Proceedings of the 8th International IFIP-TC 6 Networking Conference
Exploiting multiple paths and diversity in wireless networks for high goodput and low latency
COMSNETS'09 Proceedings of the First international conference on COMmunication Systems And NETworks
Towards handoff tolerance in TCP: link layer handoff detection for optimized data transport
MILCOM'09 Proceedings of the 28th IEEE conference on Military communications
High performance vehicular connectivity with opportunistic erasure coding
USENIX ATC'12 Proceedings of the 2012 USENIX conference on Annual Technical Conference
A transport protocol to exploit multipath diversity in wireless networks
IEEE/ACM Transactions on Networking (TON)
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As the Joint forces move towards the vision of network-centric warfare (NCW), it is extremely important that the network services be reliable and dependable, even under degraded network conditions. Tactical wireless and satellite based networks are prone to disruptions over multiple time-scales: bursty bit errors and packet loss (small time-scale), interference, jamming and capture effects (medium time-scale) and long-term path disruptions due to persistent channel impairments and mobility (large timescale). TCP does not work well over such channels because it misinterprets erasure for congestion. TCP's throughput suffers significantly, particularly when there are disruptions. Large roundtrip-times (RTT) as in satellite networks, and uncoordinated optimizations at multiple layers (PHY, MAC and transport) lead to poor performance. In this paper we describe LT-TCP, an enhancement to TCP whick makes it robust and applicable for extreme wireless environments including a mix of ad-hoc meshed networks (MANETs), airborne networks and satellite networks. LT-TCP uses an adaptive, end-to-end hybrid ARQ/FEC reliability strategy and exploits ECN for incipient congestion detection. The novelty lies in our adaptive methods that respond to learning about the underlying random packet loss and disruption process. The overhead of FEC or smaller segments is imposed just-in-time and targeted to maximize the performance benefit (measured as improved goodput and timeout reduction) even when the path characteristics are uncertain. We show that LT-TCP substantially improves performance over regular TCP even for packet loss rates of up to 40% - 50%, thus substantially extending the dynamic performance range of TCP over lossy wireless networks.