A new C-RAN architecture based on RF signal soft-switching

作者：Lu, Xiaoyuan^*; Xu, Yunxiang; Zhao, Kejun; Yang, Wen

来源：Annales des Telecommunications, 2016, 71(1-2): 1-14.

DOI：10.1007/s12243-015-0474-7

• CoMP
• Backhaul
• C-RAN architecture
• RF signal soft-switching
• Narrow-band signal
• Parallel processing
• Computer simulation

Coordinated multi-point (CoMP) is known to be one of the key technologies for long-term evolution (LTE)-advanced systems. CoMP technology can improve system capacity and the quality of wireless communication services for users in LTE networks. However, in practice, the actual performance of CoMP technology is limited by the switching capacity of the backhaul network among distributed base stations as well as its latencies. In this paper, we propose a new cloud radio access network architecture based on RF signal soft-switching to solve this problem. Furthermore, we introduce a narrow-band parallel processing technique on a common public radio interface in downlink and uplink to reduce the volume of data as well as the latencies in the transmission process among base band units and remote radio units. By combining theoretical analysis with computer simulations, we show that the technique is valid both for downlink and uplink, i.e., it does not degrade the performance of downlink and uplink propagation between BBU pool and user equipments. Moreover, the computational time of the narrow-band parallel processing technique is less than that of the standard technique.

• 出版日期2016-2
• 单位复旦大学