Fiber to the Radio/C-WAN Architecture and Its Performance Analysis
Junzhi Wang, Wenchao Liu, Jin Meng, Weimin Wu, Yingzhuang Liu · 2024
With the increasing demand for wireless services, multiple access points (AP) are inevitable. To address the serious interference among multiple APs and reduce deployment costs, we propose a fiber to the radio (FTTR) centralized wireless access network (C-WAN) architecture for the first time, where multiple APs can provide services to multiple users simultaneously through massive access and centralized scheduling. A multi-AP minimum mean square error based greedy (MA-MMSE-Greedy) algorithm is proposed to select the optimal antennas of multiple APs to maximize the system capacity. We also analyze the performance of random access and nonrandom access, and propose a grouped uplink-OFDM nonrandom-access (UONRA) mechanism to improve the quality of service (QoS) of networks. Numerical results demonstrate that the MA-MMSE-Greedy algorithm can almost achieve the best performance of the system, and the grouped UONRA mechanism significantly outperforms random access in terms of throughput and delay.