Unified Device-to-Device Communications for Low-Latency and High Reliable Vehicle-to-X Services

Abstract

We propose a novel unified radio frame structure and medium access control (MAC) protocol for low-latency and highly reliable vehicle-to-X (V2X) communications. The radio frame structure enables short latency transmission and the unified device-to-device (D2D) communication for V2X services. The unified MAC protocol simultaneously enables the cellular-assisted and ad-hoc D2D communications to enable reliable V2X services in full/partial/out-of-cellular-coverage scenario. The initial system- level simulations show promising performance results in benchmarking scenarios: Unified D2D MAC can achieve radio transmission latency below 5 ms at high reliability of 90% packet reception ratio and with high availability of coverage radius of up to 200 meter. Our on-going work is expected to provide further evaluation results of the unified D2D MAC in heterogeneous V2X scenarios.