ATOMIC: Adaptive Transmission Power and Message Interval Control for C-V2X Mode 4

Abstract

To support the emerging vehicle-to-everything (V2X) communication for autonomous vehicles and smart transportation services, 3rd Generation Partnership Project (3GPP) has recently introduced cellular V2X (C-V2X) standards. In C-V2X, radio resources can be managed not only centrally by the cellular network base station, but also in a completely distributed manner (Mode 4) without any cellular support. However, Mode 4 may suffer significant collisions and interference in a dense environment since each vehicle selects its own resources to transmit V2X messages autonomously without adapting appropriately to vehicle density. To address this challenge, we propose ATOMIC, an Adaptive Transmission pOwer and Message Interval Control scheme for C-V2X Mode 4, in which each vehicle utilizes real-time channel sensing and neighbor information to reduce channel contention for improved reliability and latency. Through analysis and extensive simulations, we show that ATOMIC outperforms the standard Mode 4 in both urban and highway scenarios especially in highly dense environments.INDEX TERMS Vehicle-to-vehicle (V2V) communication, vehicle-to-everything (V2X), cellular V2X (C-V2X) mode 4, TX power adaptation, rate control.

Interference-Aware Transmission Scheduling for Internet of Vehicles

“…The work in [6] proposes an adaptive transmit power control scheme to reduce the interference among the safety messages. In addition, the authors also propose an adaptive delay between two consecutive safety message transmissions, thus varying the packet generation rate.…”

“…Wireless communication between vehicles is used to implement intelligent and smart applications of future Intelligent Transportation Systems (ITS) [1][2][3][4][5][6]. As the robustness and reliability of wireless communications have increased over the last decade, many new applications related to passenger and vehicle safety have been introduced.…”

Dynamic resource scheduling for real-time group broadcasting in 6G cellular vehicular networks

“…There are two types of interfering vehicles: i) a vehicle that performs a reselection process simultaneously with a transmission vehicle (𝑣 𝑟 )and ii)a vehicle that was not recognized in the previous time slot, but has newly become a neighborhood vehicle of a transmission vehicle (𝑣 𝑛 ) [20,21]. Then, 𝑃 𝑓 can be calculated as follows: end for 14: end while where 𝑝 𝑐𝑜𝑙 is the probability that a transmitting vehicle and its interfering vehicles 𝑣 𝑖 ∈ {𝑣 𝑟 , 𝑣 𝑛 } select the identical resource.…”

“…where 𝑂 𝑐 (𝑣 𝑖 ) is the number of overlapped CSRs, which is assumed to be proportional to the ratio of overlapping sensing range between the two vehicles in the selfsensing range. 𝑂 𝑐 (𝑣 𝑖 ) is [21] 𝑂 𝑐 (𝑣 𝑖 ) ≈ (11) where 𝑑 𝑖 is the distance between the transmitting vehicle and interfering vehicle, and 𝑟 is the sensing range, respectively.…”

On the Design of Sidelink for Cellular V2X: A Literature Review and Outlook for Future

“…The adaptation of the message interval and transmission power is also investigated in [92], but without considering DCC rules and metrics. Instead, the message interval is adapted according to the estimated collision probability, whereas the transmission power is dynamically set to ensure the highest expected PRR given the awareness of the surrounding neighborhood, tracked through Sidelink-RSSI (S-RSSI) statistics.…”