Reliable data delivery in MANETs using PGF and VH scheme

This paper addresses the issue of reliable data delivery in highly dynamic Mobile Ad-hoc Networks (MANETs). Most existing MANET routing protocols are susceptible to data delivery in reliable and timely manner. To counter this problem, Position-based Greedy Forwarding protocol (PGF), a novel GR protocol which takes advantage of greedy forwarding and opportunistic routing is proposed. In PGF, the best forwarding candidate is used to forward the data packets. If the best forwarding candidate is not available to transmit packets, then the suboptimal candidates will take a chance to forward the packets and thus, data reliability is achieved. To enhance PGF's robustness and to deal with the communication voids, VH (Void Handling) scheme based on a virtual destination is proposed. Here, the packets are rerouted to reach the destination. Both simulation and theoretical results show that PGF leads to excellent improvement in packet delivery ratio with reduced Packet Forwarding Times per Hop (FTH) and Packet Forwarding Times per Packet (FTP) even under high node mobility.