Research On Lightweight Adaptive Networking Protocol In High Dynamic Networks

High dynamic networks composed of ground stations and mobile devices such as drones or vehicles can flexibly and extensively collect information with their high mobility,thus playing an increasingly important role in disaster monitoring and control,key area monitoring,search and rescue operations,and other application scenarios.Due to the high-speed movement of mobile devices,high dynamic networks suffer from unstable link quality and rapid topology changes,resulting in significant network overhead in networking protocols.In this scenario,using location-based beacon-less forwarding technology to design networking protocols has more advantages in terms of lightweight and reliability compared to traditional networking protocols.Therefore,this thesis designs a lightweight cross-layer networking protocol(LCP)based on beacon-less Geographic forwarding.The main work is as follows:(1)A lightweight protocol design was proposed in the LCP protocol.Firstly,for the application scenario of high dynamic information collection networks,a fast networking mechanism for the LCP protocol was designed to simplify the packet interaction during the network formation process and node access process.Secondly,an LCP lightweight forwarding scheme is proposed on the process of determining forwarding nodes in beacon-less forwarding technology.Firstly,the LCP protocol implement the interaction during the forwarding node determination process by sending and receiving MAC-layer packets through a cross layer approach.Then,based on this,a lightweight timing design was proposed to shorten the control message timing interval while avoiding collisions as much as possible.The simulation results show that in high dynamic information collection scenarios,LCP protocol accelerates the speed of network formation and node access process compared to Beacon-less On Demand Strategy for Geographic Routing(BOSS),and reduces network overhead and end-to-end latency in communication.(2)An adaptive protocol design was proposed in the LCP protocol.Firstly,an adaptive forwarding interaction mechanism was designed to address the potential presence of hidden stations among candidate nodes in data forwarding.Nodes use perceived neighbor information to eliminate interference from hidden stations in candidate nodes,and adaptively adjust the interaction mode during the forwarding process.Secondly,an adaptive forwarding region mechanism is designed for nodes located in the same sub region in the forwarding region.When the sending node has candidate nodes in the same sub region in the forward forwarding area,it adaptively divides the corresponding sub regions again to avoid potential collisions and duplication during the forwarding node determination process.The simulation results show that compared to LCP protocol(without adaptive mechanism),and BOSS protocol LCP protocol(with adaptive mechanism)significantly reduces latency and network overhead,and improves end-to-end packet delivery rate.