Abstract
Internet of Things (IoT) is ubiquitous, including objects or devices communicating through heterogenous wireless networks. One of the major challenges in mobile IoT is an efficient vertical handover decision (VHD) technique between heterogenous networks for seamless connectivity with constrained resources. The conventional VHD approach is mainly based on received signal strength (RSS). The approach is inefficient for vertical handover, since it always selects the target network with the strongest signal without taking into consideration of factors such as quality of service (QoS), cost, delay, etc. In this paper, we present a hybrid approach by integrating the multi-cri- teria based VHD (MCVHD) technique and an algorithm based on fuzzy logic for efficient VHD among Wi-Fi, Radio and Satellite networks. The MCVHD provides a lightweight solution that aims to achieving seamless connectivity for mobile IoT Edge Gateway over a set of heterogeneous networks. The proposed solution is evaluated in real time using a testbed containing real IoT devices. Further, the testbed is integrated with lightweight and efficient software techniques, e.g., microservices, containers, broker, and Edge/Cloud techniques. The experimental results show that the proposed approach is suitable for an IoT environment and it outperforms the conventional RSS Quality based VHD by minimizing handover failures, unnecessary handovers, handover time and cost of service.
Highlights
The growing popularity of Internet of Things (IoT) has opened opportunities for various new application areas
We present a hybrid approach by integrating the multi-criteria based vertical handover decision (VHD) (MCVHD) technique and an algorithm based on fuzzy logic for efficient VHD among Wi-Fi, Radio and Satellite networks
The results show that the priority ranking of Radio is higher in both algorithms, but it must be noticed that the ranking values of Radio and Satellite networks (0.678 and 0.645, respectively) are close in the conventional received signal strength (RSS) Quality based VHD method
Summary
The growing popularity of Internet of Things (IoT) has opened opportunities for various new application areas. The author in [11] presents a survey with a comparison of several vertical handover algorithms, but the research work is limited to only RSS Quality based function. The network with the highest RSS value is selected among available networks Both [14] and [15] discuss various handover methods, but they only consider RSS. The approach based only on RSS value is not effective for vertical handovers. Another handover approach [17] only considers fixed bandwidth as a decision criterion, which is challenging during dynamic bandwidth decision scenarios. E.g., [19] [20], intend to minimize the cost function of multiple metrics, such as bandwidth, delay, jitter, etc They may limit to the user satisfaction level
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