Universal Communicator Research Performance Evaluation Three scenarios –Congestion at wireless hop –Congestion at the Internet path –Congestion at both places Four approaches to compare –No reservation –R0: Reserve s –R1: Reserve min(s, f*I) –R2: Same as R1, except periodically re-adjusts allocation s: the rate specified by the source I: Internet bandwidth f: fudge factor to account for estimation error A B Senders Receivers 6Mbps Internet pathwireless hop
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