Opportunistic data forwarding has drawn much attention
in the research community of multihop wireless networking, with most
research conducted for stationary wireless networks. One of the
reasons why opportunistic data forwarding has not been widely
utilized in mobile ad hoc networks (MANETs) is the lack of an
efficient lightweight proactive routing scheme with strong source
routing capability. In this paper, we propose a lightweight proactive
source routing (PSR) protocol. PSR can maintain more network topology
information than distance vector (DV) routing to facilitate source
routing, although it has much smaller overhead than traditional
DV-based protocols [e.g., destination-sequenced DV (DSDV)], link
state (LS)-based routing [e.g., optimized link state routing (OLSR)],
and reactive source routing [e.g., dynamic source routing (DSR)]. Our
tests using computer simulation in Network Simulator 2 (ns-2)
indicate that the overhead in PSR is only a fraction of the overhead
of these baseline protocols, and PSR yields similar or better data
transportation performance than these baseline protocols.
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