Secrecy and Energy Efficiency in Massive MIMO Aided Heterogeneous C-RAN: A New Look at Interference

Abstract

In this paper, we investigate the potential benefits of the massive multiple-input multiple-output (MIMO) enabled heterogeneous cloud radio access network (C-RAN) in terms of the secrecy and energy efficiency (EE). In this network, both remote radio heads (RRHs) and massive MIMO macrocell base stations (BSs) are deployed and soft fractional frequency reuse (S-FFR) is adopted to mitigate the inter-tier interference. We first examine the physical layer security by deriving the area ergodic secrecy rate and secrecy outage probability. Our results reveal that the use of massive MIMO and C-RAN can greatly improve the secrecy performance. For C-RAN, a large number of RRHs achieves high area ergodic secrecy rate and low secrecy outage probability, due to its powerful interference management. We find that for massive MIMO aided macrocells, having more antennas and serving more users improves secrecy performance. Then we derive the EE of the heterogeneous C-RAN, illustrating that increasing the number of RRHs significantly enhances the network EE. Furthermore, it is indicated that allocating more radio resources to the RRHs can linearly increase the EE of RRH tier and improve the network EE without affecting the EE of the macrocells.

arXiv comment26 pages, 11 figures, to appear in IEEE Journal of Selected Topics in Signal Processing

References in corpus (9)

• Heterogeneous Cellular Networks with Flexible Cell Association: A Comprehensive Downlink SINR Analysis
• User Association in 5G Networks: A Survey and an Outlook
• Fronthaul-Constrained Cloud Radio Access Networks: Insights and Challenges
• Physical Layer Security for Massive MIMO: An Overview on Passive Eavesdropping and Active Attacks
• Cooperative Jamming for Secure Communications in MIMO Relay Networks
• Energy-Efficient Resource Assignment and Power Allocation in Heterogeneous Cloud Radio Access Networks
• Downlink MIMO HetNets: Modeling, Ordering Results and Performance Analysis
• Physical Layer Security in Downlink Multi-Antenna Cellular Networks
• Large-Scale MIMO versus Network MIMO for Multicell Interference Mitigation

Cited by in corpus (8)

• A Survey on Security Issues of 5G NR: Perspective of Artificial Dust and Artificial Rain
• A Survey of Optimization Approaches for Wireless Physical Layer Security
• Secure Communications in Millimeter Wave Ad Hoc Networks
• Full-Duplex Cloud Radio Access Network: Stochastic Design and Analysis
• Massive MIMO-Enabled Full-Duplex Cellular Networks
• Robustness of Low-Complexity Massive MIMO Architectures Against Passive Eavesdropping
• Power-Efficient Resource Allocation in Massive MIMO Aided Cloud RANs
• On Robustness of Massive MIMO Systems Against Passive Eavesdropping under Antenna Selection