Abstract
Recently, there has been a tremendous increase in the number of service providers offering Fixed Wireless Access (FWA). The main goal of service providers is to offer guaranteed service (GB/month) for all contents by meeting sustainability Key Performance Indicators (KPIs): cost-efficiency and security. To minimize the risk of physical deployment and handle partial recovery, network slicing between service providers is considered by using the same FWA as a service by joint consideration of Infrastructure as a Service (IaaS) and Software as a Service (SaaS). This can only be handled by Software-Defined Network (SDN) controlled OpenFlow-based FWA. However, current OpenFlow switches in the market are used only as IaaS which does not meet cost-efficiency requirement alone. The software-defined OpenFlow tables can be increased by network administrator, which is not recommended because of having no authorization limitation and poses configuration risks on the device. Here, the research question is how can the service providers keep their own network sustainable by using infrastructure in a secure, cost-efficient, and conforming to the standard in a fair way? Therefore, Sustainable Fixed Wireless Access (SFWA) is newly proposed by OpenFlow-based blockchain in this paper. To handle low computational work and fair scheduling, Proof of Stake (PoS) consensus mechanism and Weighted Fair Content Scheduling algorithms are proposed for the validation process of the blocks that stores dynamic configuration details of service providers. At the end of the whole procedure, the valid blockchain is stored in the Secure Policy Database in OpenFlow-based FWA switches. According to performance evaluation, eMBB and URLLC contents can be served by 40% and 53% discount on cost per user with guaranteed service in FWA. The service provider offers a more sustainable network by blockchain-based secured SFWA than the conventional centralized authority-based FWA.
Published Version
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