Resource Allocation in C-RAN with Hybrid RF/FSO and Full-duplex Self-Backhauling Radio Units

被引:5
作者
Bayati, Seyedrazieh [1 ]
Darabi, Mostafa [1 ]
Mostafa, Ayman [1 ]
Lampe, Lutz [1 ]
机构
[1] Univ British Columbia, Dept Elect & Comp Engn, Vancouver, BC, Canada
来源
IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC 2021) | 2021年
基金
加拿大自然科学与工程研究理事会;
关键词
Hybrid radio-frequency (RF)/free-space optical (FSO); full-duplex communication; resource allocation; cloud radio access network (C-RAN); DOWNLINK; OPTIMIZATION;
D O I
10.1109/ICC42927.2021.9500312
中图分类号
TN [电子技术、通信技术];
学科分类号
0809 ;
摘要
This paper considers the downlink of a cloud radio access network (C-RAN) consisting of a central processor (CP) and a network of connected radio units (RUs). We propose a novel resource allocation solution for the scenario with full-duplex (FD) self-backhauling RUs connected through hybrid radio-frequency (RF)/free-space optical (FSO) links to the CP for improved network throughput. This enables us to study the feasibility of the FD mode in terms of required self-interference cancellation to outperform the benchmark half-duplex hybrid RF/FSO transmission. Since the derived optimization problem for the design of the linear precoders and quantizers subject to the fronthaul capacity, zero-forcing, and power constraints, is non-convex and intractable, we develop an algorithm to solve it via an alternating optimization approach. In the simulation results, the proposed hybrid RF/FSO policy is assessed in terms of achievable rate, and we highlight the parameter range for which FD transmission is more rewarding than the time-division approach, under different weather conditions and selected RF bandwidth.
引用
收藏
页数:7
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