Authors
Ramon Caceres, Liviu Iftode
Publication date
1995/6
Journal
IEEE journal on selected areas in communications
Volume
13
Issue
5
Pages
850-857
Publisher
IEEE
Description
We explore the performance of reliable data communication in mobile computing environments. Motion across wireless cell boundaries causes increased delays and packet losses while the network learns how to route data to a host's new location. Reliable transport protocols like TCP interpret these delays and losses as signs of network congestion. They consequently throttle their transmissions, further degrading performance. We quantify this degradation through measurements of protocol behavior in a wireless networking testbed. We show how current TCP implementations introduce unacceptably long pauses in communication during cellular handoffs (800 ms and longer), and propose an end-to-end fast retransmission scheme that can reduce these pauses to levels more suitable for human interaction (200 ms). Our work makes clear the need for reliable transport protocols to differentiate between motion …
Total citations
Scholar articles
R Caceres, L Iftode - IEEE journal on selected areas in communications, 1995