Biweekly Summary - Mar. 6, 2025

Evaluate and compare 802.11p, LTE_V2X, and NR-V2X technologies from a theoretical

analysis perspective by diving deep into the examples from papers.

The paper uses the Field Test at Mondragon Unibertsitatea

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(1) Vehicles and Equipment

• Test Location: Mondragon Unibertsitatea in Spain

• Devices to communicate:

  • IEEE 802.11p: MK5 OBU (On-Board Unit)

  • LTE-V2X: MK6C OBU

• Test vehicle:

  • Equipped with GNSS (Global Navigation Satellite System) for synchronization.

  • One vehicle represents the Transmitter, and the other one represents the Receiver which monitors data transmission continuously.

(2) Test Scenarios

• Two types, for both the short-range and long-range cases:

  • 1. Short Range (LOS)

    • Distance Between Vehicles: 15-30 meters

    • Conditions: Line-of-Sight (LOS), ensuring direct signal transmission without obstructions.

    • Purpose: Suitable for testing low-latency, high-reliability communication.

  • 2:.Long Range (NLOS)

    • Distance Between Vehicles: 60-90 meters

    • Conditions: Non-Line-of-Sight (NLOS), with obstructions like buildings or other vehicles.

    • Purpose: Simulates real-world urban environments for evaluating long-range communication and signal attenuation.

802.11p: Lower latency, and more stable latency (<10ms). Thus, it is suitable for low-latency applications like platooning.

LTE-V2X: Higher latency (20-100ms) with greater variability, mainly affected by scheduling delays. So this is suitable for long-range cases.

NR-V2X:  Lowest latency(1-5ms) in LOS due to flexible numerologies and beamforming. In NLOS, NR-V2X’s latency(10-50ms) still outperforms LTE-V2X and 802.11p but suffers from beam misalignment and blockage effects.