Research On Routing Protocol In Highly Dynamic Aeronautical Ad Hoc Network

With the rapid development of aviation industry,Aeronautical Ad hoc Networks(AANET)have been used more and more in both military and civilian fields,which has aroused extensive research interest in academic and industrial circles.The aeronautical ad hoc network routing protocol is the key technology to ensure network performance.This paper studies and optimizes the routing lookup strategy and delay-limited data packets forwarding algorithm for aeronautical ad hoc networks with highly dynamic topology change,intermittent connection of link,complexity of data service and data delay constraint.This paper proposes a Greedy Forwarding-Aeronautical Routing Protocol(GF-Aero RP)based on geographic location and velocity information to adapt to the characteristics of highly dynamic topology changes in aeronautical ad hoc networks.GF-Aero RP selects the one-hop neighbor node that may fastest enter the communication range of the destination node as the next hop node according to the principle of considering speed information first and distance second.Otherwise,GF-Aero RP sub-optimally selects the one-hop neighbor node nearest to the destination node as the next hop node.NS-3 simulation results show that GF-Aero RP achieves better performance of data packet delivery ratio and end-to-end delay than that of Aero RP,Greedy Forwarding Routing Protocol(GFRP)and three traditional end-to-end routing(OLSR,DSDV and AODV)in highly dynamic aeronautical ad hoc networks with lower control overhead.In order to obtain the highest packet delivery ratio of delay constraint data packets during packets’ validity period in aeronautical ad hoc networks,this paper proposes a Priority Concern Hop-by-Hop Routing(PCHHR).Based on GF-Aero RP,PCHHR optimizes the routing lookup strategy and considers two-hop neighbor nodes to reduce the impact of routing void.PCHHR sets the forwarding priority from high to low according to the lifetime of data packets,so that data packets can be transferred as much as possible to the destination node before the lifetime is exhausted.The simulation results show that PCHHR further improves the data packet delivery ratio and reduces the end-to-end delay on the basis of GF-Aero RP;the data packets with smaller lifetime have obtained an even higher delivery ratio.The routing protocols designed in this paper and simulation verification results are valuable for the research of highly dynamic aeronautical ad hoc networks.