SDN/NFV in the IoT
Finally, efficient and hassle free network operation in the IoT can be realize by using SDN/NFV for fault/quality management, control and design in licensed bands, and then performing interworking or aggregation properly with existing short-range communication, 3G, 4G and 5G itself. However, ways to facilitate the operation and management of wireless front networks, which can assume a variety of configurations depending on the various usage models of IoT services must be considered.The 5G model network as influenced by IoT as shown in figure 2, indicates the need to converge all possible IoT networks and other networks. Such Convergence is being depicted by the 5G network and IoT process convergence model as shown in figure 3.
At present, IoT makes selective use of wired networks for fixed devices – wireless LAN, Bluetooth, Zigbee, and Mobile Communication System among others. For the case of 5G, the accommodation of a large number of IoT terminals and the provision of ultra-reliability and low-latency services, are also being envisioned. The accommodation of IoT devices in 2020 as projected can be done with the use of network convergence model as shown in the figure 3.
The model considers the basic requirements and direction demanded by IoT technology primarily considering 5G as the network backbone. As IoT spreads and its uses become increasingly sophisticated, along with the increases in traffic as the mobile internet becomes increasingly used, the traffic of the services accommodated by 5G will become increasingly diversified, both quantitatively and qualitatively. This implies the need to increase the speed and capacity of wireless access network. Increasing the speed and capacity of wireless access networks will require increasing the speed and capacity of the mobile backhaul (MBH) that provide either wired or wireless connection between backbone networks and wireless base stations, and the mobile fronthaul (FMH) that’s provides either wired or wireless connection between wireless base stations and their remote radio heads (RRH).
In order to realize this, the accommodation of a large number of devices for all IoT will require significant improvement in the call processing ability of backbone networks to control device connections. In view of this environmental changes, the major requirements to be captured by 5G network are as follows: (1) Provision of the offering different characteristics according to the diverse requirements of users; (2) Provisions of networks whose functions and configurations change dynamically according to the movement of people and environmental changes; (3) Provision of networks that are easy to operate and manage while using commoditized network equipment and open source software (OSS) and ; (4) Provision of highly scalable networks that offer large capacity and programmability.
As noted earlier, the provisions can be undertaken by increasing the performance of the network physical infrastructure systems and at the same time to virtualize the entirety of the wireless network of IoT for the various services conforming to the so called SDN. Moreover emphasis is likewise be given on the application programming interface (API) as functions between layers, along with how to determine the approach to virtualization and stratification.