Vehicular networks are characterised by a high density of nodes moving at a high speed and accessing the medium simultaneously which enlarges the interference, decreases the network throughput and spectral efficiency. That increases the challenge of designing a reliable communication scheme to handle the particular characteristics of this network and ensure user fairness. Here, a new vehicle‐to‐vehicle communication scheme is proposed. It consists of using particular vehicles (selected upon their position) to disseminate the message using non‐orthogonal multiple access technique. Power domain NOMA allocates a great amount of power to the vehicle in poor conditions, which enhances the system power control; improve throughput and user fairness in comparison with the OMA‐based IEEE 802.11p standard. A log‐normal shadowing is considered to model the propagation channel. The simulation results show that considering a channel model where severe conditions of signal propagation are present, a more advanced receiver designs have to be proposed on the subject of channel estimation and equalisation to mitigate channel effect on the received data. However, even in a harsh fading environment, NOMA outperforms OMA in terms of network throughput, spectral efficiency, and user fairness, which makes it a very promising solution for future development of vehicular communication systems.
On the use of non‐orthogonal multiple access for V2V message dissemination
IET Intelligent Transport Systems ; 13 , 7 ; 1125-1129
2019-07-01
5 pages
Article (Journal)
Electronic Resource
English
communication area , OMA‐based IEEE 802.11p standard , fading channels , vehicular networks , user fairness , nonorthogonal multiple access technique , propagation channel , network throughput , channel capacity , V2V message dissemination , log‐normal shadowing , wireless LAN , vehicle‐to‐vehicle communication scheme , interference suppression , advanced receiver designs , radiofrequency interference , realistic channel model , spectral efficiency , vehicular ad hoc networks , 5G mobile communication , wireless channels , radio receivers , reliable communication scheme , telecommunication network reliability , radio networks , channel estimation , multi‐access systems , channel effect , power domain NOMA scheme , system power control , vehicular communication systems , power control
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