Game Theoretic Approach for Multipriority Data Transmission in 5G Vehicular Networks

The vehicle-to-vehicle (V2V) communication driven by the fifth generation (5G) cellular mobile network with the features of ultra-high reliability and low latency provides promising solutions to various applications in the intelligent transportation system (ITS). To improve the resource utilization and guarantee the quality-of-service (QoS), users in 5G vehicular networks have to select appropriate communication modes and control their own transmission power. However, the highly dynamic network topology and channel status pose challenges to the mode selection. In this paper, we propose a scheme for joint mode selection and power adaptation based on the game theoretic approach with the objective of maximizing the overall system throughput. We consider the transmission requirements of multi-priority packets of different vehicular applications, where packets with higher priority have more stringent latency constraints. The segmented auction method with reserve price is performed to select modes for the vehicular users (VUEs) and the Stackelberg gaming model is introduced to solve the problem of cochannel interference. We compare our approach with three existing methods in extensive simulations. The results show that our approach outperforms the existing methods in terms of network performance, including the network throughput, resource utilization and QoS violation rate.

I. Introduction

Intelligent transport systems (ITSs) can be pushed forward by V2X communication with cooperative operations [1]. As an important part of ITS, Internet of vehicles (IoV) is recognized by academia and industry to improve traffic efficiency, road safety and the availability of infotainment services. The data transmission in IoV has the requirement of ultra-reliable and low latency communication (URLLC). The fifth generation (5G) cellular mobile networks, combined with heterogeneous network, large-scale multiple-input-multiple-output (MIMO), device-to-device (D2D) and other complementary technologies, provides tremendous opportunities for the development of IoV. The 5G vehicular network has the performance of higher network capacity, more reliable connections and lower end-to-end delay [2].