Motion Prediction Based TDMA Protocol in VANETs

In Vehicular Ad Hoc Networks (VANETs), the high mobility of vehicle nodes makes the network topology change frequently, reducing the forwarding efficiency of MAC protocol. In the existing enhanced TDMA-based MAC protocol, the farthest node in the current transmission range is chosen as the forwarding node to accelerate the multi-hop transmission. However, we use probabilistic model to show that there potentially exist better forwarding nodes, which could effectively improve transmission efficiency. Therefore, we propose a motion-prediction based TDMA protocol, which predicts the network topology in the next frame to select the better forwarding node. The test results of highway and urban scenarios show that the motion-prediction based TDMA protocol effectively reduces the number of hops in multi-hop transmission and decreases the broadcast delay by 50% to cover the whole network.

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Performance Analysis of a Flexible MAC Protocol for Real-Time Services in Vehicular Ad-Hoc Networks

International Journal of Wireless Information Networks ◽

10.1007/s10776-005-0002-1 ◽

2005 ◽

Vol 12 (3) ◽

pp. 147-157

Author(s):

Giuseppe Caizzone ◽

Paolo Giacomazzi ◽

Luigi Musumeci ◽

Gabriella Saddemi ◽

Giacomo Verticale

Keyword(s):

Performance Analysis ◽

Ad Hoc Networks ◽

Real Time ◽

Vehicular Ad Hoc Networks ◽

Ad Hoc ◽

Mac Protocol ◽

Hoc Networks

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A TDMA-Based MAC Protocol for Mitigating Mobility-Caused Packet Collisions in Vehicular Ad Hoc Networks

Sensors ◽

10.3390/s22020643 ◽

2022 ◽

Vol 22 (2) ◽

pp. 643

Author(s):

Muhammad Bilal Latif ◽

Feng Liu ◽

Kai Liu

Keyword(s):

Ad Hoc Networks ◽

Vehicular Ad Hoc Networks ◽

Ad Hoc ◽

Time Slot ◽

Mac Protocol ◽

Autonomous Driving ◽

Message Delivery ◽

Average Delay ◽

Stringent Requirement ◽

Hoc Networks

An autonomous driving environment poses a very stringent requirement for the timely delivery of safety messages in vehicular ad hoc networks (VANETs). Time division multiple access (TDMA)-based medium access control (MAC) protocols are considered a promising solution because of their time-bound message delivery. However, in the event of mobility-caused packet collisions, they may experience an unpredicted and extended delay in delivering messages, which can cause catastrophic accidents. To solve this problem, a distributed TDMA-based MAC protocol with mobility-caused collision mitigation (MCCM-MAC) is presented in this paper. The protocol uses a novel mechanism to detect merging collisions and mitigates them by avoiding subsequent access collisions. One vehicle in the merging collisions retains the time slot, and the others release the slot. The common neighboring vehicles can timely suggest a suitable new time slot for the vacating vehicles, which can avoid access collisions between their packet transmissions. A tie-breakup mechanism is employed to avoid further access collisions. Simulation results show that the proposed protocol reduces packet loss more than the existing methods. Consequently, the average delay between the successfully delivered periodic messages is also reduced.

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Communiqué Issues in MANET and VANET Protocols With Network Security Disquiet

Forensic Investigations and Risk Management in Mobile and Wireless Communications - Advances in Wireless Technologies and Telecommunication ◽

10.4018/978-1-5225-9554-0.ch008 ◽

2020 ◽

pp. 195-220 ◽

Cited By ~ 1

Author(s):

Mamata Rath ◽

Bibudhendu Pati ◽

Jhum Swain

Keyword(s):

Ad Hoc Networks ◽

Mobile Ad Hoc Networks ◽

Network Topology ◽

Mobile Networks ◽

Vehicular Ad Hoc Networks ◽

Ad Hoc ◽

Course Of Action ◽

Mobile Stations ◽

The Difference ◽

Hoc Networks

With faster expansion of mobile networks and quicker increment of web clients, more individuals approach worldwide data and communication innovation, because of which the issues of utilizing web as a worldwide stage and empowering the savvy protests and machines to coordinate, discuss, register, and ascertain slowly develops. In mobile ad-hoc networks (MANETs) and vehicular ad-hoc networks (VANET), the mobile stations and vehicles are self-reconfigurable as per the difference in network topology. Joint action between convenient centers is more basic because of the way that they confront significant difficulties, for example, frailty to work securely while protecting its advantages and performing secure guiding among center points. In the presence of vindictive hubs, one of the rule challenges in MANET is to plot ground-breaking security course of action that can shield MANET from different routing assaults.

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Medium Access Protocols for Cooperative Collision Avoidance in Vehicular Ad-Hoc Networks

Digital Rights Management ◽

10.4018/978-1-4666-2136-7.ch017 ◽

2013 ◽

pp. 354-375

Author(s):

Md. Imrul Hassan ◽

Hai L. Vu ◽

Taka Sakurai

Keyword(s):

Collision Avoidance ◽

Road Safety ◽

Vehicular Ad Hoc Networks ◽

Ad Hoc ◽

Mac Protocol ◽

Dynamic Networks ◽

Medium Access ◽

Vehicle To Vehicle ◽

Hoc Networks ◽

Safety Applications

It is envisaged that supporting vehicle-to-vehicle and vehicle-to-infrastructure communications with a Vehicular Ad-Hoc Network (VANET) can improve road safety and increase transportation efficiency. Among the candidate applications of VANETs, cooperative collision avoidance (CCA) has attracted considerable interest as it can significantly improve road safety. Due to the ad hoc nature of these highly dynamic networks, no central coordination or handshaking protocol can be assumed and safety applications must broadcast information of interest to many surrounding cars by sharing a single channel in a distributed manner. This gives rise to one of the key challenges in vehicle-to-vehicle communication systems, namely, the development of an efficient and reliable medium access control (MAC) protocol for CCA. In this chapter, we provide an overview of proposed MAC protocols for VANETs and describe current standardization activities. We then focus on the performance of the IEEE 802.11 carrier sense multiple access (CSMA) based MAC protocol that is being standardized by the IEEE standards body for VANET applications. In particular, we review prominent existing analytical models and study their advantages, disadvantages and their suitability for performance evaluation of the MAC protocol for VANETs. After a discussion of the shortcomings of these models, we develop a new analytical model in the second half of the chapter. Explicit expressions are derived for the mean and standard deviation of the packet delay, as well as for the packet delivery ratio (PDR) at the MAC layer in an unsaturated network formed by moving vehicles on a highway. We validate the analytical results using extensive simulations and show that good accuracy can be achieved with the proposed model for a range of topologies and traffic load conditions. More importantly, using the model, we show that hidden terminals can have a severe, detrimental impact on the PDR, which may compromise the reliability required for safety applications.

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Reliable Routing Protocols in VANETs

Advances in Vehicular Ad-Hoc Networks ◽

10.4018/978-1-61520-913-2.ch010 ◽

2010 ◽

pp. 200-213 ◽

Cited By ~ 1

Author(s):

Gongjun Yan ◽

Danda B. Rawat ◽

Samy El-Tawab

Keyword(s):

Network Topology ◽

Routing Protocols ◽

Vehicular Ad Hoc Networks ◽

Ad Hoc ◽

Probability Model ◽

Difficult Problem ◽

Model Based ◽

Ideal Tool ◽

Routing Method ◽

Hoc Networks

One of the notoriously difficult problems in vehicular ad-hoc networks is to ensure that established paths do not break before the end of data transmission. This is a difficult problem because the network topology is changing constantly and the routing links are inherently unstable. This chapter reviews several routing protocols which are designed for vehicular network environment. Currently, there are five major types of routing protocols based on the metrics used for routing: 1) flooding based routing, 2) mobility based routing, 3) infrastructure based routing, 4) geographic position based routing, and 5) probability model based routing. We give a survey of each type of routing method. Since probability theory is an ideal tool to describe the dynamics of vehicles, we present one probability model based routing method as a detailed example.

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