Power Control and Fuzzy Pairing in V2X Communications

Abstract

In this paper, a joint power control, and pairingbased resource allocation problem in the vehicle-to-everything (V2X) network is studied. This V2X network consists of a vehicleto-infrastructure (V2I) link and a vehicle-to-vehicle (V2V) link. Therefore, the resource allocation problem has been formulated with the objective function of maximizing the V2I link's rate with the constraints of quality of service (QoS). Due to its NP hard nature, the original resource allocation problem is divided into two sub-problems of power control and pairing. The power control sub-problem is transformed into a convex problem using an exponential variable change. A fuzzy decision-making method is exploited to solve the pairing sub-problem to have a highly reliable and stable V2V link. Then, the proposed joint power control and pairing based resource allocation technique is evaluated with a simulated highway and compared with similar pairing algorithms. These performance comparisons reveal that the stability of the proposed resource allocation technique outperforms the other related methods.

Optimizing V2X Communication: Spectrum Resource Allocation and Power Control Strategies for Next-Generation Wireless Technologies

“…Specifically, when Ψ size j = 5 for all CUEs, the system data rate of the CUEs hovers around 58.74 (bps/hz) as the number of VUEs increases. In contrast, the data rate of the CUEs in [51,52] gradually decreases with an expanding VUEs count since they do not impose data rate constraints on the CUEs. The proposed algorithm prioritizes meeting CUEs' data rate requirements before resource allocation, employing multiaccess channel matching to fully utilize spectrum resources.…”

“…This limitation arises from the allocation of only one subcarrier to each pair of VUEs. For the throughput, this study compares throughput using a multiaccess matching method for resource allocation, with references [51,52], where the resource allocation adopts a many-to-one matching scheme; that is, multiple VUEs can use the same subcarrier, and one subcarrier only allows one VUE to use. The random algorithm in [51,52] randomly assigns spectrum resources and power sizes.…”

“…For the throughput, this study compares throughput using a multiaccess matching method for resource allocation, with references [51,52], where the resource allocation adopts a many-to-one matching scheme; that is, multiple VUEs can use the same subcarrier, and one subcarrier only allows one VUE to use. The random algorithm in [51,52] randomly assigns spectrum resources and power sizes. The comparison, illustrated in Figure 4, indicates a notable enhancement in total VUEs' throughput with the algorithm proposed in this paper.…”