Comparison of location-based and CSI-based resource allocation in D2D-enabled cellular networks

This paper provides a performance comparison of location-based and Channel State Information (CSI)-based resource allocation for device-to-device (D2D) communication. Our focus is on a system where the available cellular uplink resources are reused for the exchange of messages between vehicles in D2D underlay manner. In this context, we define a heuristic resource allocation algorithm with a spectral radius feasibility check that aims to satisfy the requirements of automotive applications. Simulations show that the developed CSI-based approach achieves higher spectral efficiency as compared to a location-based scheme. However, the gains come at a price of increased feedback overhead due to the CSI acquisition.