RECV‐MAC: a novel reliable and efficient cooperative MAC protocol for VANETs

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

doi:10.1049/iet-com.2018.6171

Cited by 38 publications

(42 citation statements)

References 35 publications

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“…However, although our focus is not on relay selection in this paper, our contribution is to suggest a simple and effective selection scheme by calculating SINR. Recently, RECV-MAC protocol have proposed in [42] which fulfills 100 ms for sm. However, the performance of RECV-MAC protocol is low in high traffic scenario.…”

Section: Related Workmentioning

confidence: 99%

“…Let t be transmission probability that a vehicle broadcasts a packet in a slot time. t for each subcarrier can be written as [42] t−sc =…”

Section: Performance Analysis a Throughput Analysismentioning

confidence: 99%

“…If the total probability is 1 (probability of successful transmission + probability of packet dropping), the packet dropping rate is 1 -the probability of successful transmission. For direct transmission, packet dropping rate (ε) can be calculated as [42]…”

Section: B Packet Dropping Rate Analysismentioning

confidence: 99%

“…After the failure of direct transmission, a packet will be transmitted with cooperative transmission. For cooperative transmission, if m denotes the number of cooperation attempts, ε can be written as [42]…”

Section: B Packet Dropping Rate Analysismentioning

confidence: 99%

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OEC-MAC: A Novel OFDMA Based Efficient Cooperative MAC Protocol for VANETS

2020

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In vehicular ad hoc networks (VANETs), mobility between vehicles can cause rapid topology changes with frequent disconnections, which result in collisions and packet losses that make communications unstable. Alternatively, cooperative transmission can increase the reliability of communication by eliminating these problems in VANETS. In heavy traffic conditions, carrier sense multiple access with collision avoidance (CSMA/CA) suffers from collision, and it is not effective when high data rate is required. Therefore, orthogonal frequency division multiple access (OFDMA) is proposed. With the use of OFDMA, throughput is increased and delay is decreased by reducing the probability of collision in high traffic scenario. In this study, a novel OFDMA based efficient cooperative MAC protocol (OEC-MAC) is proposed for VANETs. Subcarrier channels assignment and access mechanisms are provided. The mechanism is presented not only for choosing the appropriate transmission mode but also for selecting the optimum relay. New control messages are defined to support cooperative communication. The performance of OEC-MAC protocol is examined by providing analytical analysis based on Markov chain model. Numerical results are demonstrated, which reveal that OEC-MAC protocol ensures a remarkable increase in throughput and also satisfies the strict delay requirement of 100 ms in VANETs for safety messages (sm). In addition, communication reliability is increased by reducing the packet dropping rate (PDR). Numerical results are compared with existing protocols, and a quantitative comparison is provided. It has been seen form results that proposed OEC-MAC protocol is better than existing schemes, especially under heavy traffic scenarios.

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Section: Related Workmentioning

confidence: 99%

“…Let t be transmission probability that a vehicle broadcasts a packet in a slot time. t for each subcarrier can be written as [42] t−sc =…”

Section: Performance Analysis a Throughput Analysismentioning

confidence: 99%

Section: B Packet Dropping Rate Analysismentioning

confidence: 99%

Section: B Packet Dropping Rate Analysismentioning

confidence: 99%

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OEC-MAC: A Novel OFDMA Based Efficient Cooperative MAC Protocol for VANETS

2020

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“…To avoid these situations, vehicles use vehicle-to-vehicle (V2V) communications to exchange dynamic parameters and other security messages, e.g., collision warning, blind spot warning and emergency brake warning [19]. These safety-related messages need to be transmitted to nearby vehicles in a short period of time, which means that these messages have strict requirements on low latency and high packet delivery ratio [20][21][22]. Since all vehicles in the surrounding area should react in real time when an emergency occurs, broadcast is more practical than unicast [23].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of IEEE 802.11p for Continuous Backoff Freezing in IoV

Xia

Fan

et al. 2019

Electronics

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With the rapid development of cloud computing and big data, traditional Vehicular Ad hoc Networks (VANETs) are evolving into the Internet of Vehicles (IoV). As an important communication technology in IoV, IEEE 802.11p protocols have been studied by many experts and scholars. In IEEE 802.11p, a node’s backoff counter will be frozen when the channel is detected as busy. However, most studies did not consider the possibility of continuous backoff freezing when calculating delay. Thus, in this paper, we focus on the performance analysis of IEEE 802.11p for continuous backoff freezing. Specifically, we establish an analytical model to analyze the broadcast performance in the highway scene where vehicles can obtain traffic density from roadside units through Vehicle to Infrastructure (V2I) communications. We first calculate the relationship between vehicle density and the number of vehicles. Then, we derive the relationship between the number of vehicles and packet delay according to Markov chains. Next, we utilize the probability generating function (PGF) to transform traditional Markov chains into z domain under the situation of non-saturation. Finally, we employ the Mason formula to derive packet delay. As compared with the performance without considering the continuous backoff freezing, the simulation results have demonstrated that our analytical model is more reasonable.

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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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RECV‐MAC: a novel reliable and efficient cooperative MAC protocol for VANETs

Cited by 38 publications

References 35 publications

OEC-MAC: A Novel OFDMA Based Efficient Cooperative MAC Protocol for VANETS

OEC-MAC: A Novel OFDMA Based Efficient Cooperative MAC Protocol for VANETS

Performance Analysis of IEEE 802.11p for Continuous Backoff Freezing in IoV

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

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