Cellular V2X With D2D Communications for Emergency Message Dissemination and QoS Assured Routing in 5G Environment

Cellular Vehicle to Everything (C-V2X) in 5G communications has attracted researchers' attention due advantages such as higher throughput, data rate and lower delay, etc. However, achieving Quality of Service (QoS) disseminating emergency messages is a challenging task frequent topology changes concurrent link losses between vehicles. To address this issue, we propose the QoS guaranteed Routing Emergency message Dissemination Device-to-Device(D2D) communication (Q-REDD) assisted C-V2X. Primarily, perform Stable Matching based that assures low end-to-end delay via selecting best forwarder. The Q-REDD method adopts Enhanced Sphere Decoder Like (ESDL) algorithm select device for establishing effective D2D C-V2X environment. If requested content not present nearby device, discoverer requests base station through pedestrian. reduce broadcast storms, performs Chaotic Crow Search Algorithm (CCSA). validate performance Q-REDD, simulations on Omnet++4.6 SUMO 0.21.0 simulator terms Packet Delivery Ratio (PDR), End Throughput, Information Coverage. obtained results demonstrate our enhances Throughput PDR up 30%, reduces by Coverage 23%, compared existing methods; GTLQR, GPSR, MIR, ETD 2 , ALQ TBED.