Analytical Modeling of Multiple Access Interference in C-V2X Sidelink Communications

Sensor localization remains a crucial function within the context of wireless sensor networks (WSNs) and is a delicate concern that has attracted many researchers’ attention. Undoubtedly, a good distance estimation between different wireless sensors allows us to estimate their accurate locations in the network well. In this article, we present a simple but very effective anchor-free localization scheme for wireless sensor networks called the contextual received signal strength approach (CRSSA) localization scheme. We use the received signal strength (RSS) values and the contextual network connectivity within an anchor-free WSN. We present and thoroughly analyze a novel joint estimation methodology for determining the range, path loss exponent (PLE), and inter-node distances in a composite fading model that addresses small-scale multipath fading and large-scale path loss shadowing effects. We formulate analytical expressions for key parameters, the node’s communication range and the PLE value, as functions of the sensor’s number, the network’s connectivity, and the network density. Once these parameters are estimated, we estimate the inter-node distances and the positions of nodes, with relatively high accuracy, based on the assumed propagation model in a two-dimensional anchor-free WSN. The effectiveness of the CRSSA is evaluated through extensive simulations assuring its estimation accuracy in anchor-free localization.

Section: Related Workmentioning

confidence: 99%

An Accurate Anchor-Free Contextual Received Signal Strength Approach Localization in a Wireless Sensor Network

Zaarour,

Hakem,

Kandil

2024

“…In our previous work in [ 22 ], we developed an analytical framework for the LTE-V2X sidelink communication protocol in terms of packet success probability by simulating the intricate relationship between the SB-SPS and the propagation environment. In this paper, we extend the analysis to include the relevant characteristics of NR-V2X communications.…”

Section: Introductionmentioning

confidence: 99%

“… A vehicle platooning use case scenario is illustrated and analyzed by considering the evolution of the standards from LTE-V2X to 5G NR-V2X sidelink operations. An analytical model of the multiple access interference due to the sensing-based semi-persistent scheduling operation, based on the preliminary work on LTE-V2X in [ 22 ], is provided and validated for the considered scenario. A framework for comparison of the successful packet delivery performance of two technologies is provided, accounting for the scheduling of available resources, the number of interfering vehicles, and their relative positions.…”

Section: Introductionmentioning

confidence: 99%

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On the Impact of Multiple Access Interference in LTE-V2X and NR-V2X Sidelink Communications

Rehman

Valentini

Cinque

et al. 2023

Self Cite

Developing radio access technologies that enable reliable and low-latency vehicular communications have become of the utmost importance with the rise of interest in autonomous vehicles. The Third Generation Partnership Project (3GPP) has developed Vehicle to Everything (V2X) specifications based on the 5G New Radio Air Interface (NR-V2X) to support connected and automated driving use cases, with strict requirements to fulfill the constantly evolving vehicular applications, communication, and service demands of connected vehicles, such as ultra-low latency and ultra-high reliability. This paper presents an analytical model for evaluating the performance of NR-V2X communications, with particular reference to the sensing-based semi-persistent scheduling operation defined in the NR-V2X Mode 2, in comparison with legacy sidelink V2X over LTE, specified as LTE-V2X Mode 4. We consider a vehicle platooning scenario and evaluate the impact of multiple access interference on the packet success probability, by varying the available resources, the number of interfering vehicles, and their relative positions. The average packet success probability is determined analytically for LTE-V2X and NR-V2X, taking into account the different physical layer specifications, and the Moment Matching Approximation (MMA) is used to approximate the statistics of the signal-to-interference-plus-noise ratio (SINR) under the assumption of a Nakagami-lognormal composite channel model. The analytical approximation is validated against extensive Matlab simulations that a show good accuracy. The results confirm a boost in performance with NR-V2X against LTE-V2X, particularly for high inter-vehicle distance and a large number of vehicles, providing a concise yet accurate modeling rationale for planning and adaptation of the configuration and parameter setup of vehicle platoons, without having to resort to extensive computer simulation or experimental measurements.

“…The most common approach is therefore to use PER vs. SINR curves as already discussed. A few examples of works where these kinds of curves are used are [ 10 , 11 ], where LTE-V2X is studied, or [ 12 ], where the subject is IEEE 802.11p. Many research activities have therefore been devoted in the last decade to assessing the performance of direct V2X communications standards and providing PER vs. SINR as an output of their work.…”

Section: Introductionmentioning

confidence: 99%

A Methodology for Abstracting the Physical Layer of Direct V2X Communications Technologies

Bartoletti

Martinez³

et al. 2022

Recent advancements in vehicle-to-everything (V2X) communications have greatly increased the flexibility of the physical (PHY) and medium access control (MAC) layers. This increases the complexity when investigating the system from a network perspective to evaluate the performance of the supported applications. Such flexibility, in fact, needs to be taken into account through a cross-layer approach, which might lead to challenging evaluation processes. As an accurate simulation of the signals appears unfeasible, a typical solution is to rely on simple models for incorporating the PHY layer of the supported technologies based on off-line measurements or accurate link-level simulations. Such data are, however, limited to a subset of possible configurations, and extending them to others is costly when not even impossible. The goal of this paper is to develop a new approach for modeling the PHY layer of V2X communications that can be extended to a wide range of configurations without leading to extensive measurement or simulation campaigns at the link layer. In particular, given a scenario and starting from results in terms of the packet error rate (PER) vs. signal-to-interference-plus-noise ratio (SINR) related to a subset of possible configurations, we first approximated the curves with step functions characterized by a given SINR threshold, and we then derived one parameter, called implementation loss, that was used to obtain the SINR threshold and evaluate the network performance under any configuration in the same scenario. The proposed methodology, leading to a good trade-off among the complexity, generality, and accuracy of the performance evaluation process, was validated through extensive simulations with both IEEE 802.11p and LTE-V2X sidelink technologies in various scenarios. The results first show that the curves can be effectively approximated by using an SINR threshold, with a value corresponding to 0.5 PER, and then demonstrate that the network-level outputs derived from the proposed approach are very close to those obtained with complete curves, despite not being restricted to a few possible configurations.