**2. Preliminaries**

Smart grids have expanded considerably, and many organizations have noticed the advantages engendered by smart meters. Thus, research on smart grids has similarly expanded. Specifically, smart grids enable the automatic distribution of power on the part of suppliers and provide usage data, which can be used to develop various applications.

Smart meters constantly upload data to the MDMS. Such data pertain to, for example, interval data readings, meter remote disconnections, meter remote reconnections, and meter firmware patches. The volume of such data is considerably large, potentially causing network collapse. The reduction of packet size in a

smart grid addresses this problem, and such a reduction has become a major topic of research. Thus, this section introduces some basic strategies that are currently adopted to solve this problem.
