  Multipath communication not only allows improved throughput but can also be
used to leverage different path characteristics to best fulfill each
application's objective. In particular, certain delay-sensitive applications,
such as real time voice and video communications, can usually withstand packet
loss and aim to maximize throughput while keeping latency at a reasonable
level. In such a context, one hard problem is to determine along which path the
data should be transmitted or retransmitted. In this paper, we formulate this
problem as a linear optimization, show bounds on the performance that can be
obtained in a multipath paradigm, and show that path diversity is a strong
asset for improving network performance. We also discuss how these theoretical
limits can be approached in practice and present simulation results.
