Towards Practical Store-Carry-Forward Networking: Examples and Issues

Masato TSURU  Mineo TAKAI  Shigeru KANEDA   Agussalim  Rabenirina AINA TSIORY  

IEICE TRANSACTIONS on Communications   Vol.E100-B   No.1   pp.2-10
Publication Date: 2017/01/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2016CQI0001
Type of Manuscript: INVITED PAPER (Special Section on Challenged Networking Technologies and Its Service Quality)
Category: Network
store-carry-forward,  vehicular ad-hoc networks,  wireless sensor networks,  UAV,  delay tolerant networks,  

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In the evolution of wireless networks such as wireless sensor networks, mobile ad-hoc networks, and delay/disruption tolerant networks, the Store-Carry-Forward (SCF) message relaying paradigm has been commonly featured and studied with much attention. SCF networking is essential for offsetting the deficiencies of intermittent and range limited communication environments because it allows moving wireless communication nodes to act as “mobile relay nodes”. Such relay nodes can store/carry/process messages, wait for a better opportunity for transmission, and finally forward the messages to other nodes. This paper starts with a short overview of SCF routing and then examines two SCF networking scenarios. The first one deals with large content delivery across multiple islands using existing infrastructural transportation networks (e.g., cars and ferries) in which mobility is uncontrollable from an SCF viewpoint. Simulations show how a simple coding technique can improve flooding-based SCF. The other scenario looks at a prototype system of unmanned aerial vehicle (UAV) for high-quality video surveillance from the sky in which mobility is partially controllable from an SCF viewpoint. Three requisite techniques in this scenario are highlighted - fast link setup, millimeter wave communications, and use of multiple links. Through these examples, we discuss the benefits and issues of the practical use of SCF networking-based systems.