Part I. Architecture of C-RAN: 1. Overview of C-RAN Chih-Lin I, Jinri Huang and Ran Duan; 2. Advanced C-RAN for heterogeneous network Sadayuki Abeta, Wuri A. Hapsari and Kazuaki Takeda; Part II. Physical Layer Design in C-RAN: 3. The trade-off of computational complexity and achievable rates in C-RAN Peter Rost, Matthew C. Valenti, Salvatore Talarico and Andreas Maeder; 4. Cooperative beamforming and resource optimization in C-RAN Wei Yu, Pratik Patil, Binbin Dai and Yuhan Zhou; 5. Training design and channel estimation in C-RANs Mugen Peng, Zhendong Mao, Yourrong Ban and Di Chen; 6. Massive MIMO in C-RANs Shi Jin, Jun Zhang, Kai-Kit Wong and Hongbo Zhu; 7. Large-scale convex optimization for C-RANs Yuanming Shi, Jun Zhang, Khaled B. Letaief, Bo Bai and Wei Chen; 8. Fronthaul compression in C-RANs Osvaldo Simeone, Seok-Hwan Park, Onur Sahin and Shlomo Shamai (Shitz); 9. Adaptive compression in C-RANs Thang X. Vu, Tony Q. S. Quek and Hieu D. Nguyen; Part III. Resource Allocation and Networking in C-RAN: 10. Resource management of heterogeneous C-RAN Shao-Yu Lien, Shao-Chou Hung, Chih-Hsiu Zeng, Hsiang Hsu, Qimei Cui and Kwang-Cheng Chen; 11. Coordinated scheduling in C-RANs Ahmed Douik, Hayssam Dahrouj, Oussama Dhifallah, Tareq Y. Al-Naffouri and Mohamed-Slim Alouini; 12. Delay-aware radio resource allocation optimization in heterogeneous C-RANs Mugen Peng, Jian Li, Hongyu Xiang and Yuling Yu; 13. C-RAN using wireless fronthaul: fast admission control and large system analysis Jian Zhao, Tony Q. S. Quek and Zhongding Lei; 14. Toward green deployment and operation for C-RAN Sheng Zhou, Jingchu Liu, Tao Zhao and Zhisheng Niu; 15. Optimal repeated spectrum sharing by delay-sensitive users Yuanzhang Xiao and Mihaela van der Schaar; Part IV. Networking in C-RAN: 16. Mobility management for C-RANs Haijun Zhang, Julian Cheng and Victor C. M. Leung; 17. Caching in C-RAN Kenza Hamidouche, Walid Saad and Merouane Debbah; 18. A cloud service model and architecture for small-cell RAN Sau-Hsuan Wu, Hsi-Lu Chao, Hsin-Li Chiu, Chun-Hsien Ko, Yun-Ting Li, Ting-Wei Chang, Tong-Lun Tsai and Che Chen; 19. Field trials and testbed design for C-RAN Chih-Lin I, Jinri Huang, Min Yan and Xiaogen Jiang.