SDN-Driven Internet of Health Things: A Novel Adaptive Switching Technique for Hospital Healthcare Monitoring System

Abstract

In the last decent, the number of Internet of Things (IoT) health-based paradigm reached to a huge number of users, services, and applications across different disciplines. Thus, hundreds of wireless devices seem to be distrusted over a limited or small area. To provide a more efficient network, the software-defined network (SDN) thought to be a good candidate to deal with these huge number of wireless users. In this work, after a novel SDN algorithm is proposed for the hospital environment, it is also designed and integrated into an Internet of Health Things (IoHT) paradigm. The novel algorithm called adaptive switching (AS) is proposed as a novel adaptive access strategy based on adaptively hoping among existing Go-Back-N and Selective Repeat techniques. Finally, the throughput performance of the proposed AS method is compared with the performances of traditional Go-Back-N and Selective Repeat ARQ methods using the developed MATLAB simulation. For this, an optimal P error rate that the network should prefer to switch either from Go-Back-N to Selective Repeat or from Selective Repeat to Go-Back-N method to maximize the network throughput performance is determined. The evaluated results are also confirmed by theoretical calculation results using well-known Mathis throughput formula. It is observed from the simulation results that the best throughput performance can be evaluated, when AS switches to Go-Back-N if the P error is less than 3.5% and it switches back to Selective Repeat when the P error is greater than 3.5%. By this way, it is also observed that the throughput always has its best possible results for all P error rates and up to 37.52% throughput improvement is provided by the use of novel proposed adaptive switching (AS) algorithm.

Dissecting wireless body area networks routing protocols: Classification, comparative analysis, and research challenges

“…In AS, 148 the authors developed an adaptive switching protocol for SDN‐driven IoHT that gives an improved throughput rate and is based on adaptive longing but was not tested for the performance of the protocol. In SDMob, 149 the authors designed a protocol in mobile IoT applications with low reliability of the RPL that gives high PDR, increased efficiency, low delay, and better QoS, but they did not consider a single point of failure.…”