Improving TCP/IP performance over wireless networks
MobiCom '95 Proceedings of the 1st annual international conference on Mobile computing and networking
I-TCP: indirect TCP for mobile hosts
ICDCS '95 Proceedings of the 15th International Conference on Distributed Computing Systems
ATP: A Reliable Transport Protocol for Ad Hoc Networks
IEEE Transactions on Mobile Computing
Investigation of the block ACK scheme in wireless ad hoc networks: Research Articles
Wireless Communications & Mobile Computing - Medium Access Control Protocols for Wireless Ad Hoc Networks
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The founding idea behind this study was that 802.11 acks and TCP acks are substantial contributors to 802.11 overheads, yet, they both provide the same functionality; rellability. Initial experiments suggest that 802.11 acks contribute to over 20 % of the overhead in 802.11 networks. Unfortunately, without 802.11 acks, paths with RITs greater than a millisecond are unable to utilise this additional performance because lost packets, which occur frequently in unacknowledged (NoAck) 802.11, are interpreted as congestion. This study experiments with a range of PEPs (performance Enhancing Proxies) which retransmit lost packets. A new proxy, known as D-Proxy, designed to solve the shortcomings of previous I-TCP and Snoop proxies, is experimentally developed and tested in Linux. D-Proxy is a distributed, proactive proxy that caches, analyses and resends packets based on TCP sequence numbers. The results suggest that D-Proxy can substantially improve 802.11 throughputs.