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We propose a novel mechanism called In-Network Packet Caching Mechanism (InPCM)
to address TCP's poor performance in IEEE 802.11 based multi-hop wireless
networks. In particular, we address TCP's inappropriate response to bursty and
location dependent errors. The key concept is the use of intermediate nodes to
perform packet recovery on behalf of TCP senders, similar to the well-known
Snoop TCP but adapted to work over multi-hop wireless networks. We have
conducted {\em ns-2} simulation studies over a variety of network conditions
and topologies. Our results confirm InPCM's benefits to TCP in terms of delay
and throughput. Moreover, it is immediately deployable without modifications
to current protocols.
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