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\documentclass{acmabs}

\begin{document}

\Journal{Journal of the ACM}

\refkey{TemperoL95}

\title{Recoverable Sequence Transmission Protocols}

\author{Ewan~D. Tempero \and Richard~E. Ladner}

\Month{September}

\Year{1995}

\Volume{42}

\Number{5}

\note{To appear}

\maketitle

\begin{abstract}

We consider the sequence transmission problem, that is, the problem of
  transmitting an infinite sequence of messages $x_1 x_2 x_3 \dots$ over a
  channel that can both lose and reorder packets. We define performance
  measures, ideal transmission cost and recovery cost, for protocols that solve
  the sequence transmission problem. Ideal transmission cost measures the
  number of packets needed to deliver $x_n$ when the channel is behaving
  ideally and recovery cost measures how long it takes, in terms of number of
  messages delivered, for the ideal transmission cost to take hold once the
  channel begins behaving ideally. We also define lookahead, which measures the
  number of messages the sender can be ahead of the receiver in the protocol.
  We show that any protocol with constant recovery cost and lookahead requires
  linear ideal transmission cost. We describe a protocol,
  $\mathcal{P}_{\mathrm{lin}}$ that has ideal transmission cost~$2n$, recovery
  cost~$1$, and lookahead~$0$.

\end{abstract}

\end{document}
