Title: An effective congestion control scheme based on early offload for space delay/disruption tolerant network

Authors: Sanhua Song

Addresses: College of Information Engineering, Huanghuai University, Zhumadian 463000, China

Abstract: The storage resources and communication resources of spatial network nodes are generally very limited, and they have the characteristics of large time delay and cannot guarantee the existence of end-to-end path all the time. Messages may reside in the intermediate nodes for a long time, which makes the congestion of spatial network inevitable and leads to the decline of network performance. In order to solve this problem, an effective congestion control scheme for space delay/disruption networks based on early unloading is proposed. In this scheme, the change rate of node cache is monitored at all times, and measures are taken in advance when congestion is about to occur, so that messages are transmitted through the non-optimal path prior to the optimal path, so as to alleviate the node storage pressure. Simulation results indicate that the presented scheme can achieve higher success rate of message delivery and more uniform network traffic distribution.

Keywords: space delay/disruption tolerant network; SDTN; congestion control; early offload; contact graph routing; congestion avoidance.

DOI: 10.1504/IJSN.2021.112838

International Journal of Security and Networks, 2021 Vol.16 No.1, pp.28 - 36

Received: 28 Nov 2019
Accepted: 03 Jan 2020

Published online: 20 Jan 2021 *

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