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In wireless ad hoc networks, heterogeneity is inherent; each node has different characteristics, resources and policies. Most current ad hoc routing protocols do not consider node heterogeneity when making routing decisions. Although existing ad hoc routing protocols can be extended to consider heterogeneity, these methods require changes to the routing protocol packets and the packet processing. The authors propose a simple, transparent modification during the route discovery phase of an on-demand routing protocol to select the best route considering heterogeneity. In their solution, nodes can influence their likelihood of participating in routing packets for other nodes, and there is no noticeable change to the routing protocol.
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