Location-Based LTE-M Uplink Power Control and Radio Resource Scheduling

Area of Science:

• Telecommunications Engineering
• Urban Rail Transit Systems
• Wireless Communication

Background:

• Long-Term Evolution for Metro (LTE-M) is crucial for bi-direction train-wayside communication in urban rail transit.
• Inter-cell interference in LTE-M systems reduces throughput, particularly affecting trains at cell edges, and compromises operational safety and efficiency.

Purpose of the Study:

• To investigate uplink power control and radio resource scheduling schemes for LTE-M in urban rail transit.
• To mitigate inter-cell interference and enhance data communication reliability and throughput.

Main Methods:

• Developed a location-based algorithm utilizing available train location data to calculate and manage inter-cell interference.
• Implemented a soft frequency reuse strategy in conjunction with the location-based algorithm.
• Employed a proportional fair algorithm for uplink radio resource scheduling to ensure fairness across diverse train-wayside communication service requirements.

Main Results:

• The proposed location-based algorithm effectively calculates and mitigates inter-cell interference by leveraging train positions.
• The integrated scheme of location-based control and soft frequency reuse demonstrated significant improvements in uplink power control.
• Simulations verified the practicability and effectiveness of the proposed schemes in enhancing data communication throughput for urban rail transit.

Conclusions:

• The developed uplink power control and radio resource scheduling schemes are practical for LTE-M systems in urban rail transit.
• The proposed methods effectively address inter-cell interference, leading to improved communication reliability and throughput.
• This research contributes to safer and more efficient urban rail operations through advanced wireless communication strategies.