||Due to the rising number of mobile devices and the increasing demand for better quality of service (QoS), issues related to the next generation of mobile networks are gaining significant attention from academia and business on the global level. One such network, known as the fifth generation (5G) mobile communication network, could provide a flexible, reliable, and high-performance network architecture for wireless communication beyond 2020. 5G combines many types of technologies, including radio access technologies (RATs), hardware improvements, and algorithms.|
In order to build such a high-performance mobile communication network with robust security, many technical solutions have been proposed. One such solution, known as small cells, deploys large numbers of base stations of different sizes within the service scope of the wireless networks. By deploying small cells, we can improve the power utilization, channel capacity, and coverage of 5G. However, changes in infrastructure between 4G and 5G may cause another problem.
Assume that 5G inherits the connection principle of 4G, in which a user terminal must connect to macro cells, the largest base stations, whenever it runs the handover protocol. The number of handovers executed by the user terminals will increase substantially owing to the large number of small cells, thus increasing the total latency. Therefore, we want to construct a handover authentication protocol that is secure, cost efficient, and tailored to 5G. This protocol will also preserve privacy and provide a functional active revocation mechanism that can revoke warrants in emergencies.