Employing multiple paths for achieving high capability and robustness has
some obvious benefits. New wireless technologies are giving more Internet
access modes for notebooks and smart phones. However, most multipath
protocols may not get acceptable throughput if reliable transmission is
guaranteed. For some cases, the situation may even worse than using single
path only. The main reason has strong relationship with the principal of
multipath transmission. Motivated by these facts, specific analytical
mechanisms are proposed to analyze the potential problems which may lead to
serious performance decrease. Following that, we investigate how to use
multiple paths legitimately when network environments are fluctuating. In our
simulation, topologies for multiple paths and single path are set up for
evaluating our analytical methods. Some distinguished scenarios are chosen
from different perspectives. The results have revealed some throughput
critical conditions and could be helpful in designing scheduling schemes for
multipath protocols.