Greedy routing protocols provide a scalable and cost effective solution for routing packets in Mobile Ad-hoc NETworks (MANETs). However, such routing protocols can not be used in the networks where holes exist. We propose a Virtual Ring-based Hole Avoiding Routing protocol (VRHAR) in MANETs where holes exist.Simulation studies show that the proposed protocol can improve the routing performance more effectively than existing greedy routing protocols.
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