D2D scheme for vehicular safety applications in LTE advanced network

Long Term Evolution (LTE) appears to be a practical alternative to IEEE 802.11p for vehicular applications. Vehicular safety applications are based on broadcasting messages, which contain information such as location and speed to the neighboring vehicles. However, as LTE is an infrastructure-based network, all communication should pass through it, which can cause congestion and substantial delays that are unsuitable for safety applications. By introducing direct D2D communication in 3GPP Release 12, known as LTE-Advanced, User Equipments (UEs) can communicate directly if they are in close enough proximity. In this paper, we propose an approach to use direct D2D, as well as cellular communication. This approach helps to reduce the amount of resources that are used for cellular communication, while keeping information of vehicles on a central server that can be utilized for other vehicular applications such as traffic efficiency.

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