Research On Reliable Transmission Strategy In Delay Tolerant Networks

Delay tolerant network (DTN, Delay-Tolerant Network) is a new type of networkdifferent from the previous model we use the traditional wireless network, due to itsfrequent interruptions link transmission delay of the high data transmission rate, errorrate and other characteristics of resource-constrained nodes, often resulting in end toend path cannot exist, making the TCP/IP protocol can not run well on a delay tolerantnetwork. However, with the continuous development of wireless networks, applicationscenarios DTN networks more and more, the current scenario DTN networks generallyhave interplanetary network, sparse ad hoc networks, wildlife monitoring network andinformation warfare network,so it is need to study for DTN network routing algorithm.This paper mainly focus on two aspects of meet the demand of business flow andtime delay requirement research routing algorithm with QoS guarantee ability. In theprotection of the business in the process of traffic demand, through a fixed link of theoriginal sequence and the transmission rate, get effective connected sequence networkin each link, and based on this, advances the DTN routing algorithms with trafficsecurity, to build the transmission paths, in order to improve the network transportcapacity, so as to achieve the aim of ensuring traffic transmission reliability. In theprotection of time delay in the process of, and puts forward the routing algorithm withdelay guarantee, to link the link rate and connected sequence comprehensiveconsideration, constructed on the premise of guarantee the required flow path that couldsatisfy the requirement of time delay. The simulation results show that under the samenetwork topology model, adopting the routing algorithm with QoS guarantee ability cansignificantly improve the link utilization, achieve the goal of security network trafficand delay transmission reliability.