Abstract
The exponential growth of devices connected to the network has resulted in the development of new IoT applications and on-line services. However, these advances are limited by the rigidity of the current network infrastructure, in which the administrator has to implement high-level network policies adapting and configuring protocols manually and usually through a command line interface (CLI). At this point, Software-Defined Networking (SDN) appears as a viable alternative network architecture that allows for programming the network and opening the possibility of creating new services and more efficient applications to cover the actual requirements. In this paper, we describe this new technology and analyze its opportunities in the development of IoT applications. Similarly, we present the first applications and projects based on this technology. Finally, we discuss the issues and challenges in its implementation.
Highlights
The emergence of new services and applications on-line, both in fixed terminals and mobile devices, has made the communication networks a strategic point in companies, institutions, and homes
The exponential growth of devices and online services that exchange information over the network consolidated the concept of Internet of Things (IoT)
Software-Defined Networking has emerged as an alternative to the current problems of traditional networks
Summary
The emergence of new services and applications on-line, both in fixed terminals and mobile devices, has made the communication networks a strategic point in companies, institutions, and homes. The infrastructure responsible for transmitting the information coming of IoT devices (routers, switches, 3G and 4G networks, and access points) should be adapted to the new post-PC services (VoIP, sensor virtualization, QoS, cloud computing, and IoT applications) while providing security, stability, high rate, and availability amongst others Some efforts such as the European Union Projects of SENSEI [2], Internet of Things-Architecture (IoT-A) [3], or Cognitive Management Framework for IoT [4] as well as the new protocols for Wireless Sensor Networks including the Data Driving Routing Protocol [5] have tried to get smarter connectivity between network elements (fully integrated Future Internet). The work is structured as follows: in Section 2 the limitations of traditional networks is presented; Section 3 defines the Software-Defined Networking concept; Section 4 presents the evolution of Network Operating Systems (NOS); in Section 5, the first SDN applications are reviewed; in Section 6, the challenges of SDN technology are discussed; Section 7 presents the conclusions
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