Research And Optimization Of D2D Ad Hoc Link State Routing Protocols

In the context of mobile Internet,wireless networks carry more and more communication services.This requires wireless networks to provide higher quality communications services.In traditional cellular communications,all services must be forwarded via the base station,which carries enormous communication pressure.To this end,D2D(Device-to-Device)ad hoc network technology has been the concern.In the absence of ancillary equipment,user terminals form a none-centered,multi-hop network.Mobile routing protocol is one of the key issues in ad hoc networks.The main research content of this topic is ad hoc network link-state routing protocol.Link-state routing protocol has good routing performance,but its extension is not good.In larger networks,control packets of link-state routing protocols can easily trigger broadcast storms and consume large amounts of wireless bandwidth resources.Therefore,this topic focuses on the extension mechanism of the link-state routing protocol.The main work of this paper includes:1.This paper analyzes the design requirements of ad hoc network routing protocol and describes the characteristics of various mainstream ad hoc routing protocols.The working mechanism,advantages and disadvantages of the link-state routing protocol are emphatically analyzed,and the improvement space of the link-state routing protocol is found.2.For the weak extension of the link-state routing protocol,the improved link-state routing protocol is proposed(ILSR),adding four improved technologies for link-state routing protocol,multipoint relay technology,hazy-sighted link-state technology,control message batching sending technology and control message hierarchical sending technology.These four technologies respectively enhance the extension of the link-state routing protocol from four different aspects.3.In the network simulation software NS-3,based on the OLSR protocol,the improved link-state routing protocol is realized.The simulation script is written and the improved link-state routing protocol,OLSR routing protocol and standard link-state routing protocol are tested.The simulation results verify the theoretical analysis.The improved link-state routing protocol has obvious advantages in terms of routing overhead and significantly improves packet loss rate,transmission delay and network throughput.4.On the UAV D2D platform,the installation of routing networking software OLSRd is completed,and the routing software is improved.Completed the two-hop file transfer speed test outside.