Abstract: Meteor-burst communication is an important emergency communication mode,and the communication network has the characteristics of long delay transmission and intermittent interruption of link.The routing algorithm applicable to this special network has obvious pertinence and needs further study.Based on the study of meteor topology network topology,this paper built a meteor network model based on OPNET simulation software,and proposed an improved algorithm OED (Optimistic Earliest Delivery) by analyzing the communication delay model combined with ED (Earliest Delivery) algorithm and EDLQ(Earliest Delivery with Local Queue) algorithm for DTN (Delay Tolerant Network).Based on the established model,the data transmission success rate and network throughput were simulated.The simulation results show that the OED algorithm is superior to the ED algorithm and EDLQ algorithm in terms of data throughput and data transmission success rate of network,and it can overcome the packet loss caused by the queue overflow.By increasing the node capacity,the data pass rate of OED algorithm is increased by 20% compared with ED algorithm and is increased by 8% compared with EDLQ algorithm.The choice of routing algorithm does not affect the ave-rage durationand the average interruption latency time of link between the meteor nodes.OED algorithm has strong adaptability in meteor trail network,which can provide reference for meteor burst network construction.

Key words: Delay model, Delay tolerant network, Meteor burst communication, Optimistic earliest delivery algorithm