研究目的
To propose joint optimal transceiver placement and resource allocation schemes for redirected cooperative hybrid FSO/mmW 5G fronthaul networks to optimize reliability, average transmitted power, average BER, and number of disrupted links under various weather conditions.
研究成果
The proposed LMMTP and LATP schemes effectively improve network reliability, reduce average transmitted power and BER, and minimize disrupted links in hybrid FSO/mmW fronthaul networks, especially under severe weather conditions. The optimal transceiver placement, determined based on annual weather distribution, enhances performance over conventional topologies, demonstrating the feasibility of redirected cooperative networks for 5G applications.
研究不足
The complexity of the exhaustive search method increases with the number of transceivers and configurations, which may be computationally intensive for large networks. The study assumes homogeneous weather conditions and neglects effects like strong scintillations in FSO links, which could impact performance in real-world scenarios.
1：Experimental Design and Method Selection:
The study formulates the problem as multiobjective and bilevel integer linear programming (ILP) problems, using lexicographic optimization methods (LMMTP and LATP schemes) to prioritize objectives such as reliability, power, BER, and disrupted links. An exhaustive search method is employed to find optimal solutions.
2：Sample Selection and Data Sources:
The network consists of N remote radio heads (RRHs) with a baseband processing unit (BBU) pool, using annual weather distribution data (visibility and rainfall rate) from the service area for simulations.
3：List of Experimental Equipment and Materials:
FSO and mmW transceivers with specified parameters (e.g., wavelengths, power levels, modulation formats), MATLAB software for numerical evaluations, and simulation parameters as detailed in Table I of the paper.
4：Experimental Procedures and Operational Workflow:
Generate feasible transceiver placements and configurations, evaluate performance metrics (reliability, power, BER) for each configuration under different weather conditions, select optimal configurations using lexicographic optimization, and compute average performance over weather intervals.
5：Data Analysis Methods:
Use MATLAB to implement exhaustive search, compute metrics, and analyze results through numerical simulations and comparisons with other topologies.
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