A deep space dtn network multi-hop transmission method

Abstract

The invention provides a deep space delay tolerant network (DTN) multiple hop transmission method which comprises the following steps: step (a). an originating node divides a file to be transmitted into several bundle data units; step (b). each data slot in i parallel sessions is transmitted and retransmitted; step (c). real-time evaluation is carried out on memory resource occupancy of the current node i and successful delivery probability of the bundle data units of the DTN; and step (d). if the probability of successful delivery is larger than 0.5, a node i-1 continues to send a lost red data slot to the node i, step (b) and step (c) are repeated during the transmission process until the whole bundle data units are completely restored, then multiple hop data transmission of the entire file from the originating node to a destination node is finished, and a transmission link is closed. Due to the fact that the method is not limited to a specific context in application, higher degree of transportability is gained, sizes of protocol data at all levels guided by the method are reasonable in layout, and deep space file multiple hop transmission of high efficiency, low delay and high probability of successful delivery can be obtained.

Description

technical field [0001] The invention relates to a deep space DTN network multi-hop transmission method. Background technique [0002] As an evolution scheme of the future space data communication protocol architecture, the Delay / Disruption Tolerant Networking (DTN, Delay / Disruption Tolerant Networking) architecture proposed by CCSDS is due to its ability to deal with multi-path communication, intermittent transmission, large delay, high bit error rate and resource sharing. The aspect has very strong ability, is accepted by more and more space organizations and agencies and is regarded as the most promising protocol architecture of the future Interplanetary Internet (IPN, Interplanetary Internet). The DTN protocol architecture adopts the BP (Bundle Protocol) layer as the overlay layer, which provides a way to solve the problem of reliable data transmission in heterogeneous networks. As one of the salient features of the BP layer, the custodial transmission mechanism allows t...

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Problems solved by technology

(3) The analysis method of the memory characteristics of the intermediate nodes of the ground DTN network: because the ground communication environment does not involve the ultra-long distance of the deep space environment, large time delay, high bit error rate, intermittent connection, and asymmetric uplink and downlink, etc., this paper The analysis method lacks the consideration of the extremely harsh environment, and the parameter setting and modeling method are not suitable for the analysis of the memory dynamic characteristics of the deep space DTN intermediate node

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