Optimizing Vehicular Safety Message Communications by Adopting Transmission Probability With CW Size

Shah, A. F. M. Shahen; Karabulut, Muhammet Ali; İlhan, Hacı; Tureli, U.

doi:10.1109/access.2022.3221418

Cited by 11 publications

(8 citation statements)

References 31 publications

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“…The CW size is optimized in [14] for VANETs to improve the performance of the transmission of safety messages, taking into account traffic, vehicle velocity, and the number of vehicles. A comparison between IEEE 802.11 and IEEE 802.11p in terms of throughput and delay performance is presented, using a Markov Chain analytical model.…”

Section: Literature Review On Fuzzy Logic Model and Cwmentioning

confidence: 99%

Optimization of Contention Window and Relay Selection for Efficient Routing Using Fuzzy Logic Model

Septa¹,

Wagh²

2023

IEEE Access

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The rapid increase in vehicle density on roads owing to urbanization and motorization has led to increased risks of roadblocks, traffic jams, and accidents. To ensure the reliability of transportation, it is crucial to have stable and timely transmission of safety messages through Vehicle Ad-hoc Networks (VANETs). However, frequent vehicle movement and changes in the network topology may cause link breakage and packet loss. This paper proposes a solution that uses a fuzzy logic system in both the Medium Access Control (MAC) layer and the network layer to broadcast safety messages efficiently. The proposed rule-based model optimizes the Contention Window (CW) and relay selection process to adapt to different traffic conditions. The dynamic CW MAC (DYCW-MAC) model selects the optimum size of CW based on network parameters such as density, velocity, and link quality factor. For multi-hop communication, the model determines the next forwarding relay by considering factors such as direction, velocity difference, coverage factor, and Fast-Expected Transmission Count (F-ETX) between the sender vehicle and surrounding vehicles within its transmission range. The simulation results indicate that the DYCW-MAC model enhances the network throughput and decreases the average packet delay in comparison to other models.

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Section: Literature Review On Fuzzy Logic Model and Cwmentioning

confidence: 99%

Optimization of Contention Window and Relay Selection for Efficient Routing Using Fuzzy Logic Model

Septa¹,

Wagh²

2023

IEEE Access

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“…The performance of IEEE 802.11p for vehicular communications is scrutinized in [4]- [14]. In [4], an analytical study is provided to show the effect of IEEE 802.11p in VANETs and an optimization mechanism is presented. In [5], Markov chain model based theoretical study is outlined where delay expression is derived.…”

Section: Related Workmentioning

confidence: 99%

“…The throughput analysis is not presented in [5], [8]- [10]. Moreover, only sm are considered in [4]- [10]. To evaluate the efficiency of IEEE 801.11p for VANETs an analytical study is provided in [11] and an optimization mechanism is presented in [12].…”

Section: Related Workmentioning

confidence: 99%

“…In [14], both sm and nsd are considered in performance analysis. However, ideal channel is assumed in [4]- [14]. These studies assumed that transmission of a packet is successful if there is no collision, and that transmission is unsuccessful if there is a collision.…”

Section: Related Workmentioning

confidence: 99%

“…The packet with the greatest power may be efficiently captured by the receiver after concurrent transmissions. The impact of capture and channel fading are not considered in [4]- [14].…”

Section: Related Workmentioning

confidence: 99%

See 2 more Smart Citations

Influence of channel fading and capture for performance evaluation in vehicular communications

Shah¹,

Karabulut²,

İlhan³

et al. 2022

Preprint

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<p>Autonomy and intelligent transportation systems (ITS) have recently shown an increased interest in vehicle ad hoc networks (VANETs). Additionally, the impending 5G and 6G technologies will result in substantial advancements for VANETs. IEEE 802.11p summarizes specifications of physical (PHY) and medium access control (MAC) layers for VANETs. Existing analytical methodologies require improvement despite the fact that performance assessments of IEEE 802.11p MAC have been carried out. Bit error and channel capture influence performance of vehicular communications in real-world transmission. These effects are investigated separately in previous works. In this paper, an extensive study is provided which integrates these two major factors. In VANETs, the influence of channel fading and capture on IEEE 802.11p is investigated analytically using a Markov chain model. For Nakagami-m, Rayleigh, and Rician fading channels, performance impacting factors are taken into account, and relationships between parameters as well as performance metrics are derived. The probability of unsuccessful and successful transmission, outage probability, probability of frame capture, throughput, bit error rate, and delay terms are attained. Moreover, simulation results are provided which verify analytical studies.</p>

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Cooperative communication for safety message dissemination in unsaturated networks with varying contention windows

Septa¹,

Wagh²

2023

Int J Communication

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Summary Safety message dissemination is crucial in vehicular ad hoc networks (VANETs) for road safety applications. Vehicles regularly transmit safety messages to surrounding vehicles to prevent road accidents. However, changing vehicle mobility and density can cause unstable network conditions in VANETs, making it inappropriate to use a fixed contention window (CW) for different network densities. It has been proposed a 1‐D Markov model under unsaturation conditions to analyze the performance of the system with varying CWs under changing vehicle densities. Additionally, it introduces the use of cooperative communication (CoC) to relay failed safety messages. In CoC, two control packets, namely, negative acknowledge (NACK) and enable to cooperate (ETC), are utilized. The proposed analytical model named cooperative communication for safety message dissemination (CoC‐SMD) is used to calculate throughput and average packet delay for varying CW and different packet size. The simulation confirms the validity of the analytical results and show significant improvement in the metrics through the use of varying CW sizes and CoC compared with existing techniques.

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Optimizing Vehicular Safety Message Communications by Adopting Transmission Probability With CW Size

Cited by 11 publications

References 31 publications

Optimization of Contention Window and Relay Selection for Efficient Routing Using Fuzzy Logic Model

Optimization of Contention Window and Relay Selection for Efficient Routing Using Fuzzy Logic Model

Influence of channel fading and capture for performance evaluation in vehicular communications

Cooperative communication for safety message dissemination in unsaturated networks with varying contention windows

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