Ad hoc networking by Stefano Basagni; et al

By Stefano Basagni; et al

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Therefore, modeling users’ movements is an important aspect in ad hoc network simulation. Important aspects that need to be considered [173] during simulation include the definition of the simulated area in which users’ movements take place, the rules for modeling users that move beyond the simulated area, the number of nodes in the simulated area, the node mobility model, and the allocation of nodes at the simulation start-up, and so on. Typically, simulation studies consider a fixed number of users that move inside a closed rectangular area.

Entries in the route cache are continually updated as new routes are learned. AODV is an improvement on the DSDV protocol. AODV minimizes the number of route broadcasts by creating routes on an on-demand basis [61], as opposed to maintaining a complete list of routes as in the DSDV algorithm. Just like DSR, route discovery is initiated on an on-demand basis, the route request is then forward to the neighbors, and so on, until either the destination or an intermediate node with a fresh route to the destination are located.

Further work is also needed to investigate the feasibility and performance of hybrid ad hoc routing approaches to allow the integration of hierarchical, table-driven routing protocols with on-demand routing to create scalable routing strategies that can adapt well to various ad hoc environments. Finally, multicasting, which is essential for supporting multiparty multimedia communications, has not been studied as extensively, and significant research effort is needed to come up with efficient multicasting algorithms to cope with multicast group dynamics.

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