Affiliations: Unik, Gunnar Randers vei 19, 2007 Kjeller,
Norway | Q2S, Department of Telematics, NTNU, O.S. Bragstads
plass 2a, N-7491 Trondheim, Norway | Simtel, Simulat/Telernor, P.O.Box 134, 1325 Lysaker,
Norway. E-mail: {vph,erl,okure,paalee}@unik.no
Abstract: Many have proposed to connect Mobile Ad Hoc Networks (MANETs) to a
wired backbone Internet access network. This paper demonstrates that a wired
backbone network can be utilized for more than just providing access to the
global Internet. Traffic between mobile nodes in the ad hoc network may also be
routed via this backbone network to achieve higher throughput, and to reduce
the load in the ad hoc network. This is referred to as transit routing. This
paper proposes a cost metric algorithm that facilitates transit routing for
some of the traffic flows between nodes in the MANET. The algorithm aims at
carrying out transit routing for a flow only when it leads to improvements of
the performance. The proposal is implemented and tested in the ns-2 network
simulator, and the simulation results are promising.