# Server Operation and Virtualization to Save Energy and Cost in Future Sustainable Computing
## 5 Conclusions and Future Work  
The overall embodiment drawing is shown above, designed in an intuitive structure. Compared to the time when dedicated network equipment was used, the number of switches increased because of the switch for internal communication inside the server and the control switch for operating management. In the past, it seemed that additions were made when the compatible server was used, which was once included inside the dedicated network equipment. As for the specific composition, vMME includes 4 servers, and vGW includes 7 servers. For internal communication between servers, the internal switches are placed respectively. Internal switches were placed for internal communication between servers. The control switch enabled the operating management of the system by interlocking with CMS and EMS. The external switch was separately placed to interlock with the external network.  
13 HP DL380 servers were used for vEPC networking, and 4 switches were used. If these are converted based on Q3 in 2016, it is about 400 million Korean won. As for the software price, if it is estimated to be 1 billion won, which is half the price of the existing dedicated network equipment, vEPC can be constructed with 1.326 billion Korean won, which is 24% less than 1.8 billion Korean won. Figure 13 above shows the difference in cost between vEPC and the existing EPC. While there may be a difference from network manufacturers, about 1.8 billion Korean won is generally known to be spent on EPC system construction. If vEPC is constructed as proposed in this study; however, only 1.326 billion won is needed.  
Figure 12: The vEPC Construction Design in the Paper.  
Also, a vEPC has been developed for the Server Operation so that it can support the system. Based on these efforts, the system performance has been improved from 3.244 h. to 2.04 h. in terms of data processing time (see Figure 14).  
When the existing costs of the telecommunication system construction and the telecommunication system cost through NFV visualization were compared, cost and energy savings were realized. The service provider can make network configuration more quick and easy in case of abrupt traffic change or a new service launching. Moreover, the price is lower than the existing network equipment.  
A system that efficiently reduces the network server operation cost based on the NFV technology is presented in this study. The performance analysis has shown that the cost was significantly reduced  
Figure 14: System Purchase Time Comparison at LG Display Co., Ltd., Seoul, Republic of Korea.  
Figure 13: System Purchase Price Comparison at LG Display Co., Ltd., Seoul, Republic of Korea.  
by 24% compared to the operation cost of the existing network server. It is expected that the technology used in this research will be foundational to future sustainable computing.  
While it may not be easy to replace the existing system, which works well in the NFV virtualization in the telecommunication service industry where network performance and stability are important, if such price competitiveness is demonstrated elsewhere, setting NFV virtualization may be acceptable for further extension.  
The first draft part of this paper was presented in at the 12 th KIPS International Conference on Ubiquitous Information Technologies and Applications (CUTE 2017) [40], 18-20 December 2017, Taichung, Taiwan. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2017R1C1B5077157).  
The author declares no conflict of interest.