Power Control for Clustering Car-Following V2X Communication System With Non-Orthogonal Multiple Access

Abstract

Vehicle clustering has been utilized for reducing the complexity of vehicle-to-everything (V2X) communications that would ultimately improve road traffic efficiency. Using a car-following model in a V2X communication system, we propose a vehicle clustering method for dynamically classifying vehicles and adjusting cluster size in real time. The especially important issue for the selected cluster-head vehicles (CHVs) can achieve an optimal trade-off between the CHVs' relative speed and power allocation. Furthermore, in order to balance the power allocation among the CHVs to further increase the downlink throughput, a power control approach for non-orthogonal multiple access (NOMA) is proposed. In this approach, the power allocation coefficients are obtained by maximizing the achievable rate while meeting the predefined target rate of each NOMA user. Finally, numerical simulations are provided to confirm the theoretical results and demonstrate the superior performance of the proposed approach. Note that through the numerical simulations, we can find the critical point of maximizing the minimum achievable rate among the CHVs at low transmission power of base station (BS).

Multiobjective Optimization of Uplink NOMA-Enabled Vehicle-to-Infrastructure Communication

“…Then, by using iterative signaling control, the vehicles autonomously calculated the power management in a distributed manner. In [10], Xiao et al proposed a dynamic vehicle clustering and power management scheme for the NOMA-enabled V2X systems. The authors' system model was composed of a single BS and multiple vehicle clusters, and the objective was to enhance the minimum achievable rate of the vehicles.…”

Joint Beamforming Design for Energy Efficient Wireless Communications in Heterogeneous Intelligent Connected Vehicles Networks

“…The authors in [9] review the history development, standardization progress, and academic studies over V2X (vehicle to everything) and V2I (vehicle to infrastructure). In [10], a clustering method is proposed for vehicle communications networks. Moreover, a power allocation scheme is also developed in [10] for wireless transmission rate maximization when this ICV networks employ NOMA (non-orthogonal multiple access) protocol.…”

“…In [10], a clustering method is proposed for vehicle communications networks. Moreover, a power allocation scheme is also developed in [10] for wireless transmission rate maximization when this ICV networks employ NOMA (non-orthogonal multiple access) protocol. In [11], an access scheme is proposed for mm-wave V2X systems by addressing the access in the domain of both angle and energy.…”

Stackelberg Game-Based Power Allocation for V2X Communications

“…Moreover, the temporal and spatial dynamics of the V2X network were investigated in [10].In spite of the above attractive features and application scenarios, there are also a great number of problems in the coexistence of V2X communication and other networks, such as the resource allocation (RA), interference management on account of co-channel interference (CCI) caused by spectrum reuse. In order to solve these problems and achieve technical breakthroughs, several related works have been done in terms of RA, power control, congestion control, link scheduling, interference coordination, and so on [11][12][13][14][15][16][17][18][19][20][21][22][23]. The authors of [11] focused on the existing RA algorithms for V2X communications, and these algorithms were classified and compared with each other according to selected criteria.…”

“…The authors of [19][20][21] investigated the radio resource management (RRM) for V2X communications, including both vehicle-to-infrastructure (V2I) and vehicle-to-vehicle (V2V) communication. The author of [22] proposed the joint clustering method and power control scheme in V2X communications to reduce the communication complexity, as well as the total power consumption of base station (BS). Besides, an age of information (AoI)-aware transmission power and resource block (RB) allocation technique has been proposed for vehicular communications [23].With extensive applications of high-speed multimedia services, there has been a lot of service data to be processed by the terminal equipment.…”