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In this paper, we envision a hybrid opto-acoustic network design for theinternet of underwater things (IoUT). Software-defined underwater networking(SDUN) is presented as an enabler of hybridizing benefits of optic and acousticsystems and adapting IoUT nodes to the challenging and dynamically changingunderwater environment. We explain inextricably interwoven relations amongfunctionalities of different layers and analyze their impacts on key networkattributes. Network function virtualization (NFV) concept is then introduced torealize application specific cross-layer protocol suites through an NFVmanagement and orchestration system. We finally discuss how SDUN and NFV canslice available network resources as per the diverging service demands ofdifferent underwater applications. Such a revolutionary architectural paradigmshift is not only a cure for chronicle underwater networking problems but alsoa way of smoothly integrating IoUT and IoT ecosystems.

A Software-Defined Opto-Acoustic Network Architecture for Internet of Underwater Things