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Lydia Sidrak A Comparison of Mechanisms for Improving TCP Performance over Wireless Links
 

Summary: Lydia Sidrak
A Comparison of Mechanisms for Improving TCP Performance over Wireless Links
Hari Balakrishnan, Venkata Padmanambhan,
Srinivasan Seshan, Randy Katz
TCP assumes packet losses are due to congestion, and reacts with congestion control and
avoidance procedures. This is a problem for wireless networks in which many errors occur due to
transmission issues, in which the same reaction would result in reduced throughput. This paper
presents a survey of implementations improving TCP performance (defined as end-to-end
throughput and wired/wireless goodput) over wireless links, all of which can be mostly
categorized by the following:
End to end proposals
These use selective ACKs to allow recovery from multiple packets loses without coarse
timeout.
Have the sender distinguish congestion from other forms of losses using Explicit Loss
Notification.
Split connection proposals
Hide wireless links from sender by stopping TCP connections at base station (second
connection use techniques such as negative ACKs or SACK over wireless link)
Link-layer proposals
Hide link related losses from TCP with local retransmits and forward error correction.

  

Source: Akella, Aditya - Department of Computer Sciences, University of Wisconsin at Madison

 

Collections: Computer Technologies and Information Sciences