SZLS-GPSR: UAV Geographic Location Routing Protocol Based on Link Stability of Communication Safe Zone

In the application environment of UAV Ad-Hoc network with frequent topology changes and unstable communication links, in order to improve the stability of network routing, this paper proposes SZLS-GPSR (Safe zone link stability GPSR) routing protocol based on the stability of communication safe zone links, aiming at the problems of unstable communication edges and routing repair holes that appear in traditional GPSR algorithms. By setting up a communication safe zone, the projection length, cumulative communication duration and flight direction of nodes in the communication safe zone are comprehensively measured to select the relay node with the most stable link. Moreover, in the peripheral forwarding stage, the problem of path redundancy and routing holes is improved since the factors of the forwarding angle and the degree of adjacent nodes are both taken into account. With the comparison and analysis of NS-3 network simulation platform, it proves that the proposed protocol has more advantages in packet delivery success rate, end-to-end delay and average hops compared with the traditional GPSR and MM-GPSR protocols.