# Educational 5G Edge Computing: Framework and Experimental Study
## 2 Related Work
Considering that the existing work has focused solely on high-level and abstract system design, as well as independent MEC-based resource scheduling algorithms and MEC-based smart applications, the existing MEC framework proposed by ETSI and 3 GPP and mentioned in the above studies is temporarily unable to meet the deployment's requirements of smart campus. Based on the above research, the following issues still need further research. 1. The deployment location of UPF and MEC is unclear in current MEC structures, which cannot guarantee data security. UPF and MEC are logically separated, but there are two possible methods of deployment: combined deployment and separate deployment, which denote that the UPF and MEC are deployed in the same room or different rooms, respectively. Actually, the combined deployment method is not suitable for the education industry: if UPF and MEC are combined and deployed in the Telecom operators room, it violates the security requirements that educational data cannot leave the campus. Conversely, if the UPF and MEC are deployed in the customer's room, it is not conducive to the operation and maintenance of the operator, and will bring security risks to the entire core network. Based on the above analysis, for an educational 5G MEC framework, UPF and MEC should be deployed separately, with UPF deployed by the telecom operators, and MEC deployed in the campus's computer room. However, in a separate deployment scenario, there is currently a lack of a network and data security assurance devices and methods between the UPF and the MEC, and there is a security risk. 2. The problem of multi-network access on campus. The architecture does not address how data accessed and transmitted by non-5G networks are handled. There are many types of terminal access technologies in the vertical education industry. In addition to 5G, there are 4G, WiFi, Bluetooth, Zigbee, NB-IoT, and wired networks. The terminal data accessed by these networks may not be transmitted to the MEP through a 5G network. In order to ensure the network and data security of the MEP, a device and method for supporting multi-network access are required, which can perform access control, traffic control, and security monitoring for terminal data of various access technology types. 3. The problem of wide-area interconnection between different campus's MEPs. In addition to the local data offloading, the educational scenarios demand wide-area interconnection between MEPs, such as high-definition live recorded courses, virtual simulation experiments, and other scenarios between different campuses. However, the UPF defined by the 3 GPP only supports the PDU session from the UE to the DN; it does not support the connection from the DN to the DN. Thus, the UPF supports the data connection only from the terminal to the MEP instead of interconnection between the MEPs. An integrated MEC's system architecture is desired to solve the above problems. 4. The need for efficient device management to schedule computing resources. Considering that the resource becomes even more constrained if more and more smart applications are developed and deployed, it is necessary to manage the devices and services based on the temporal and spatial characteristics of campus users, especially with the tidal effects of various campus applications. 5. The application authentication is not unified; thus, user data needs to be aggregated and connected. It is essential to solve the problem of application unified portal, single sign-on, and realize rapid deployment, as well as the aggregation and display of campus education data. Therefore, it is imperative to explore a converged edge computing technology to meet the connection, computing, security, and other needs of education customers and to design new ICT infrastructure for education customers in the 5G era. That is the proposed architecture of eMEC (consisting of UGW and eMEP).