the past few decades, the world has witnessed
a rapid growth in mobile communication and reaped great
benefits from it. Even though the fourth generation (4G)
mobile communication system is just being deployed worldwide, proliferateing mobile demands call for newer wireless
communication technologies with even better performance.
Consequently, the fifth generation (5G) system is already
emerging in the research field. However, simply evolving
the current mobile networks can hardly meet such great
expectations, because over the years the infrastructures
have generally become ossified, closed, and vertically constructed. Aiming to establish a new paradigm for 5G mobile
networks, in this article, we propose a cross-layer softwaredefined 5G network architecture.