Analysis of a S-TDMA distributed scheduler for ad-hoc cellular-V2X communication

The Deployment of new techniques to accommodate high data throughput, significant reliability, and quality of service (QoS) delivery prompts the use of 4G and 5G networks in several applications. In these networks, Vehicle‐to‐Everything (V2X) communications authorised by device‐to‐device cellular links (D2D) have gained momentum because of their potential to improve road safety, efficiency, and convenience. This improvement is to be provided by different types of V2X communications, including Vehicle‐to‐Pedestrian (V2P), Vehicle‐to‐Vehicle (V2V), Vehicle‐to‐Infrastructure (V2I), and Vehicle‐to‐Network (V2N) communications. However, considering several limiting factors such as mobility and increasing number of vehicles, efficiency of using wireless resources is a challenging task. Indeed, different research works on V2X radio resource allocation have been studied and evaluated with respect to several criteria. In this study, a survey of recent works but in a different way synthesising radio resource allocation methods is presented. Resource allocation classification into different categories is proposed. This classification is related to three main factors. The first takes into account the selection mode factor. It highlights the use of different approaches in each of the centralised, distributed, and mixed modes. The second one takes into account the considered performance criteria, including capacity, priority, delay etc. The last one focuses on the methods and scenarios used to evaluate a resource allocation approach.

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“…Two new resource allocation schemes are proposed in refs. [101,102] to allocate resources in V2X communications. The method proposed in ref.…”

Section: Capacitymentioning

confidence: 99%

“…The method proposed in ref. [101] is proposed to maximise the sum ergodic capacity of V2I communications while satisfying the latency violation probability for V2V links. The scheme is based on large-scale channel information and uses the theory of effective capacity to indicate the constraint of latency.…”

Section: Capacitymentioning

confidence: 99%

Resource allocation for Vehicle‐to‐Everything communications: A survey

2022

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“…STDMA has originally been developed by [9] and standardized at ETSI as a potential alternative to the WiFi V2X CSMA-CA scheduler [10]. Several studies showed its salient features and it has been investigated also as a potential alternative scheduler for LTE-V2X [11].…”

Section: Wltb Traffic and 5g Resource-grid Matchmentioning

confidence: 99%

“…Without full duplex radio front-ends, such limitations cannot be fully cancelled, but it is possible to improve the schedulers by choosing which UE would conflict. A recent proposal, called SH-STDMA [11], places resources conflicting from half-duplex as far away as possible, thus mitigating effective packet losses. Accordingly, SH-TDMA manages to reach ~99.9999% Packet Delivery Ratio (PDR), thus meeting one of the criteria for Ultra-Reliable and Low-Latency (URLL) V2X communications.…”

Section: Wltb Traffic and 5g Resource-grid Matchmentioning

confidence: 99%

Applicability of 5G Technology for a Wireless Train Backbone

Aljama

Arriola

Martinez

et al. 2021

2021 15th European Conference on Antennas and Propagation (EuCAP)

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The migration of TCMS communications to a Wireless Train Backbone (WLTB) is one of the main goals of CONNECTA-2 and Safe4RAIL-2 projects of Shift2Rail initiative. In this paper the suitability of 5G technology for a WLTB is analyzed, both for infrastructure-based and V2X networks. Obtained results indicate that 5G technology is suitable for a WLTB, but in order to cover a large number of consists either high-end 5G configurations need to be used (e.g. 4x4 MIMO in millimeter waves) or the requirements for the WLTB need to be scaled down.

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“…High mobility, the restriction of a dynamic road network topology, unpredictable network size, and infrastructure support are only a few of the challenges for using VANETs. Such variables would affect communication and accessibility strategies as they affect scalability, recurrent information exchange, time-critical communication, wireless medium of communication, and data exchange efficiency [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Vehicles Communication and Connectivity Using Persistent Carrier Sensing Multiple Access Protocol

2023

IJIES

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This paper investigates the effectiveness of using P-persistent carrier sensing multiple access (P-Persistent CSMA) on vehicular connectivity as vehicles dynamically form temporary communication networks using simulation and mathematical modelling. In the connected and autonomous environment, effective and efficient connectivity between vehicles (V2V) and between vehicles and infrastructure (V2I) is critical. The simulation was performed in MATLAB and included the investigation of the effect of vehicular density, probability value change, and increase in Backoff time, and change in data frame size. The results showed that as vehicular density, probability, and data frame size increased, throughput decreased as data traffic increased, whereas as Backoff time and probability increased, throughput increased. Furthermore, as data size increases with decreasing probability level, channel utilization improves. Based on these findings and the derived mathematical expressions, a proposed dynamic and adaptive model is presented, allowing for maximum throughput while minimizing collisions. This is accomplished by equating four mathematical expressions and substituting them using iteration to achieve a balanced and optimal level of communication channel utilization by dynamically adjusting the three main parameters under consideration as a function of increasing vehicular density (P-Persistent probability level, Backoff time, and data frame length). To achieve such dynamical and adaptive optimization, four mathematical expressions are used. The resulting model is promising and will improve the efficiency of non-adaptive conventional P-Persistent CSMA. The presented work proved to increase the effectiveness of the conventional p-persistent technique using a multi-dimensional parameter correlation, which is more effective than weighted, slotted, or adaptive P-Persistent approaches.

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Analysis of a S-TDMA distributed scheduler for ad-hoc cellular-V2X communication

Cited by 5 publications

References 12 publications

Resource allocation for Vehicle‐to‐Everything communications: A survey

Resource allocation for Vehicle‐to‐Everything communications: A survey

Applicability of 5G Technology for a Wireless Train Backbone

Vehicles Communication and Connectivity Using Persistent Carrier Sensing Multiple Access Protocol

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