VANET Aided D2D Discovery: Delay Analysis and Performance

Abstract

Existing solutions for integrating device-to-device (D2D) communication in cellular networks require added functionalities and consume valuable network resources, mainly in the discovery process. This paper effectively reduces the consumption of valuable resources in the LTE-A network through proposing a new D2D discovery scheme that works for vehicular users. The proposed scheme is able to offload a portion of the D2D discovery traffic and processing that involve vehicular drivers and passengers to Vehicular Ad-hoc Networks. The proposed scheme uses the inherent knowledge of the road side units about vehicular users in their coverage areas. In addition, this paper develops an analytical model to analyze the duration of peer discovery in highway scenarios. The results are validated through simulations done using real environments. The analytical and numerical results demonstrate the effectiveness of the proposed scheme, and show that a low discovery latency can be attained. © 2017 IEEE.