DTN network data transmission method using bundle block aggregation on dual-hop asymmetric channel

Abstract

The invention provides a DTN network data transmission method using bundle block aggregation on a dual-hop asymmetric channel. The method is characterized by repackaging, on the premise that the last-hop data is not completely absorbed, a part of data into a bundle according to a link characteristic when a link is communicated in a next hop by using bundle block technology, and accelerating transmission and increasing link utilization efficiency by using a block manner; by using bundle aggregation technology, aggregating multiple data packets to form a large data packet and then transmitting the large data packet. The method decreases the number of the data packets by means of the bundle aggregation so as to reduce the number of feedback packets, shorten data transmission time, and increase throughput. In addition, the method improves the structure of RS so as to enable the RS to change within a small range even in a high bit error rate case. The method effectively solves problems that a DTN is overlong in network transmission and storage waiting time, wastes transmission opportunities, and is low in throughput in the case that an upper link and a lower link are asymmetric in transmission rate and high in bit error rate.

Description

technical field [0001] The invention relates to the technical field of deep space communication, in particular to a DTN network data aggregation transmission method. Background technique [0002] Delay / Disrupt-Tolerant Networking (DTN, Delay / Disrupt-Tolerant Networking) was proposed by Fall et al. in 2003, which provides a possible solution for the realization of space Internet. ). Since the Interstellar Internet includes a variety of different communication scenarios, the propagation delay and channel conditions are different, and the underlying protocols adopted by local networks such as the deep space backbone network and the adjacent network are also different. DTN provides data transmission services for different applications by introducing an overlay layer-bundlelayer between the application layer and the local underlying network, realizes the interconnection between local networks, and supports the adoption of protocols with the best performance in the local networks...

AI Technical Summary

Problems solved by technology

In such a case, the bundle aggregation will inevitably lead to the increase of the data bundle

The increase of the data packet increases the probability of data packet loss and error, so the size of each feedback packet (RS) will also increase, so the probability of error and packet loss of the feedback packet RS also increases

And because of the difference in the rate of the upper and lower links, the RS will encounter a greater delay during transmission

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