These next generation standardization activities and related technical discussions are getting more and more interesting because advanced communication theories are consistently proposed, studied, discussed, and finally adopted as one of major technologies in standardization activities; e.g., millimeter-wave wireless communications, massive multiple-input-multiple-output (MIMO) wireless systems and precoding, device-to-device networking. This book introduces cutting-edge technological topics in future mobile cellular and wireless access standardization. With a solid understanding about the candidate technologies, readers can obtain a better understanding for future standardization.