## 1 Introduction  
The conventional power system is gradually being substituted with a modern-based technological infrastructure that utilizes a recent and emerging communication system known as smart grid (SG). Smart grids ensure more secure distributed generation options, adequate power storage, and state-of-the-art communication technologies. Smart grid also fuses and combines several technological advancements like sensor measurement technologies, computer technologies, control technologies, and communication technologies with the conventional grid facilities to form an innovative type of electric grid that represents a developmental stride of the upcoming power grid [1]. In modern times, smart grids have proven to be self-healing, economically viable, clean, safe, and armed with the capabilities of delivering high-grade power networks suited for the digital age. Unlike the conventional electric power grids that only allow a single passage flow of electricity, smart grids permit a two-way electricity passage between electricity customers and power grids. Furthermore, and most significantly, the integration of Information Communication Technologies (ICTs) into the grid presents a two-way passage of information, thereby enabling the grid to possess digital capabilities and transforming electricity consumers to become active contributors and participators. The diagram in Figure 1 depicts an ideal model of a typical smart grid, as considered in [2]. It comprises seven different sectional domains with information flowing between them. The four main domains below practically depict the physical facilities of a conventional power grid representing the generating, transmitting, and distributing sectors coupled with the customers. There is also a flow of energy that exists between them which is denoted by the solid red line in the figure. The three other domains located at the top are primarily associated with the information communication technology infrastructure and other electricity facilities comprising service providers, power markets, and operations. The flow of information is represented by dashed blue lines in the figure serving as a source of interaction between the domains, thereby arming the power grid with smartness and intelligence. Developing an adaptable communication infrastructure with the existing wireless communication technologies can be very beneficial and favorable to smart grids. This will no doubt provide advanced technological infrastructure, thereby avoiding extra cost and time and will further provide growth in communication technologies and the inclusion of additional applications. Wireless communication technologies have become a significant part of smart grids since they are largely responsible for monitoring, controlling, and delivering commands amongst power-generating processes, substations, and the end user [3]. Regardless, numerous communication networks can be deployed in smart grids, for instance, Long-Term Evolution, WiMAX, and 5G networks. In a practical scenario, a single wireless communication network cannot successfully cater for the whole entirety of smart grid applications [4]. The 5G network is, however, perceived to be one of the most ideal wireless communication technologies for the next generation of electrical grids owing to its ultra-low latency, high security, data rates, and high performance [5]. The emergence of fifth-generation mobile networks (5G) as a technological means of communication in smart grids can, however, bring about an unparalleled opportunity to proffer and improve on a countless number of promising applications like Demand Response, Smart Homes, Vehicle-to-Grid (V2G), and Advanced Metering Infrastructure  
Figure 1: A typical smart grid model [2]. (AMI) [6; 7].