研究目的
To demonstrate the real-time implementation of novel spectrum usage concepts based on combined Licensed Shared Access (LSA) and Carrier Aggregation (CA) techniques for multiple non-adjacent carriers in LTE-Advanced systems to address the growing data traffic demand in mobile broadband networks.
研究成果
The study successfully demonstrated the technical feasibility of LSA carrier aggregation in a real-time LTE-A system, achieving up to 450 Mbps data throughput. It highlights CA as a key enabler for efficient spectrum sharing, providing a scalable solution for future mobile broadband demands, with recommendations for further dynamic optimization and standardization efforts.
研究不足
The implementation relies on specific hardware (e.g., SDR toolkit, MicroTCA) and frequency bands, which may not be universally applicable; the shielded box environment limits real-world interference testing; processing delays and synchronization requirements impose constraints on real-time performance.
1：Experimental Design and Method Selection:
The experiment involved designing a real-time demonstrator for LSA-based CA using an LTE-Advanced system compliant with 3GPP Release 12. It utilized a proof-of-concept setup with a base station (eNB) and user terminal supporting three component carriers, incorporating LSA mechanisms for dynamic spectrum access.
2：It utilized a proof-of-concept setup with a base station (eNB) and user terminal supporting three component carriers, incorporating LSA mechanisms for dynamic spectrum access.
Sample Selection and Data Sources:
2. Sample Selection and Data Sources: The setup used specific frequency bands (e.g., 2.63 GHz, 2.68 GHz, 811 MHz) as component carriers, with spectrum grants managed by an LSA repository and controller based on predefined zones (licensing, exclusion, reservation).
3：63 GHz, 68 GHz, 811 MHz) as component carriers, with spectrum grants managed by an LSA repository and controller based on predefined zones (licensing, exclusion, reservation).
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Included an LTE-A eNB, SDR-based user terminal with remote radio heads (RRH), DSP cards (TI TMS320C6670), MicroTCA chassis, antennas, spectrum analyzer (Rohde & Schwarz FSW), and software tools (Linux Ping, IPerf).
4：Experimental Procedures and Operational Workflow:
Configured the eNB and UE for 3CA operation; dynamically switched carriers on/off based on LSA grants; performed over-the-air transmissions in a shielded box; measured throughput and delay using IP-based applications.
5：Data Analysis Methods:
Analyzed data throughput, spectrum usage, and system performance using spectrum analyzer measurements and software tools for statistical evaluation of real-time operation.
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