Performance Evaluation Of 802.11P Vanets With Different Duty Cycles (original) (raw)
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Performance evaluation of IEEE 802.11p MAC protocol in VANETs safety applications
2013 IEEE Wireless Communications and Networking Conference (WCNC), 2013
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2011
Vehicular Ad-hoc Networks (VANETs) are currently in everyone's mouth when talking about future technologies that will be implemented in the automotive industry. In the last years the IEEE group has been working in the development of a standard for vehicular communications, this standard is the 802.11p. Most research work in this area has focused on vehicleto-vehicle communication architecture; thus, more research is still necessary on the vehicle-to-infrastructure communication architecture.
Performance comparison between 802.11 and 802.11p for high speed vehicle in VANET
International Journal of Electrical and Computer Engineering , 2019
Vehicular ad-hoc networks (VANETs) technology has been emerged as a critical research area. Being ad-hoc in nature, VANET is a type of networks that is created from the concept of establishing a network of cars for a specific need or situation. Communication via routing packets over the high-speed vehicles is a challenging task. Vehicles mobility, speed can vary depending on the road specification. However, on highway, the speed can be increase up to 120-200 Km/H. Moving at high speed can affect the efficiency of data delivery. In particular V2I traffic where moving car trying to deliver data to fixed space units which are designed to collect and process data from vehicles. Different protocols have been proposed to be implemented for VANET infrastructure, including 802.11 and 802.11p. The performance of these proposed protocols has not been compared and investigated to find out the robust mechanism for handling high speed VANETs. In this paper, the performance of the most widely deployed MAC protocols for handling wireless communication which is 802.11 and the 802.11p have been compared, which is a customized version for high speed modes. Performance is investigated in term of data delivery evaluation metrics including network throughput, delay and packet delivery ration. Results show that 802.11p has efficiently enhanced the network performance where network throughput is increased, delay is decreased, and packet delivery ratio is increased as well. 1. INTRODUCTION Recently, Vehicular Ad-hoc Networks (VANET) becomes more popular and widely deployed over all the roads across the world. Most of modern cars are equipped with Wireless modules which provides vehicles to communicate with each other's and with communication control points [1]. Enhancing Inter-Vehicle communication and roadside communication are considered as the most popular wireless communication research topic. VANET allows road vehicles to notify other vehicles about traffic jams, sudden stops and other hazardous road conditions [2]. The huge number of expected benefits of VANET and a number of supporting vehicles are likely become the most realized implementation of mobile Ad hoc networks. Short range IEEE 802.11 can be used for vehicle communications using suitable radio interface technology [3]. However, a new standard for both physical and MAC layer has been developed to meet the requirement of communication between vehicles, IEEE 802.11p is an approved amendment to the IEEE
The IEEE 802.11p Performance for Different Packet Length and Arrival Rate in VANETs
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Performance Evaluation of IEEE 802.11p MAC Protocol for VANETs
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VANETs is an emerging new technology which integrates the capabilities of new generation wireless networks to vehicles. Vehicle safety has always been a major concern for automotive engineers. Information about one vehicle can be forwarded to another vehicle using the IEEE 802.11p standard protocol, providing a driver or autonomous vehicle with information regarding speed and direction of the approaching vehicle. In this paper, The latest NS-2 distribution package version 2.34 supports simulation of IEEE 802.11p and provides significantly high level of VANETs simulation accuracy. This paper evaluates the performance of IEEE 802.11p Mac protocol by comparing performance of two routing protocols AODV and DSDV this is done by analyzing three performance metrics throughput, packet loss and average end to end delay.
802.11p-Based VANET Applications Improving Road Safety and Traffic Management
Emerging Innovations in Wireless Networks and Broadband Technologies
In the last few years Intelligent Transportation Systems (ITS) based on wireless vehicular networks have been attracting interest, since they can contribute towards improving road transport safety and efficiency and ameliorate environmental conditions and life quality. In order to widely spread these technologies, standardization at each layer of the networking protocol stacks has to be done. Therefore, a suite of protocols along with the architecture for the wireless environments with vehicles has been developed and standardized. Both in the US as well as in Europe the selected wireless communication protocol has been the 802.11p protocol developed by the IEEE. In this chapter, we discuss the potential impact of ITS towards achieving the above targets of improving road safety and traffic control. We review the overall architecture and the protocol functionality and present in detail a number of applications that have been developed demonstrating selected use-cases on an 802.11p com...
Vehicular networks using the IEEE 802.11p standard: An experimental analysis
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The IEEE 802.11 working group proposed a standard for the physical and medium access control layers of vehicular networks called 802.11p. In this paper we report experimental results obtained from communication between vehicles using 802.11p in a real scenario. The main motivation is the lack of studies in the literature with performance data obtained from off-the-shelf 801.11p devices. Our study characterizes the typical conditions of an 802.11p point-to-point communication. Such a study serves as a reference for more refined simulation models or to motivate enhancements in the PHY/MAC layers. Field tests were carried out varying the vehicle's speed between 20 and 60 km/h and the packet length between 150 and 1460 bytes, in order to characterize the range, throughput, latency, jitter and packet delivery rates of 802.11p links. It was observed that communication with vehicles in motion is unstable sometimes. However, it was possible to transfer data at distances over 300 m, with data rates sometimes exceeding 8 Mbit/s.
Performance Analysis of IEEE 802.11p Protocol with Retry Limit in VANETs: An Analytical study
Procedia Computer Science, 2019
The IEEE802.11P is the standardized protocol given by IEEE for vehicular ad-hoc networks. The mechanism for MAC for IEEE802.11p is called Enhanced Distributed Channel Access (EDCA). After reaching contention-window up to its maximal limit, it got reset to minimum after successful transmission of the frame. Otherwise the frame is dropped after crossing the retry counter limit. The paper presents an model of delay and throughput for IEEE802.11p protocol along with the upper bound of retry-limit. After certain limit the contention window size will stop increasing and packet will be dropped as soon as the retry limit reaches to its upper bound. To create the model, the 3D Markov chain is used for modeling. The evaluation of throughput and delay for IEEE802.11p has been given.
IEEE Vehicular Networking Conference (VNC), Amsterdam, The Netherlands, 2011
The 802.11p standard has been recently standardized to provide Wireless Access in Vehicular Environments (WAVE). A multi-channel architecture is envisioned to concurrently support both time-sensitive safety-related applications and value-added informative and entertainment services. According to the WAVE specifications, an alternating channel access scheme allows single-radio devices to tune into a common frequency during the control channel (CCH) interval, to exchange safety and control packets, and to subsequently switch to one of the available service channels (SCHs) for non-safety related data exchange. Broadcasting of short-lived packets is largely expected to be used on the CCH to deliver periodic status updates from vehicles and network initialization information. This paper investigates the joint impact of different packet generation patterns and contention window sizes on the delivery of broadcast packets on the CCH by accounting for WAVE channel switching under different traffic load conditions, data rate and packet size values.
Enhancements of IEEE 802.11p Protocol for Access Control on a VANET Control Channel
2011 IEEE International Conference on Communications (ICC), 2011
Adding communication capabilities to vehicles and road infrastructure has become a major goal in the intelligent transportation systems industry. The IEEE 802.11p amendment has specially been conceived for the Wireless Access in Vehicular Environments (WAVE) architecture. In this paper we study the performance of this standard by the means of extensive simulations and we argue that the current version of the protocol can not cope with high vehicular densities. We propose a simple but efficient modification of the back off mechanism which has an important impact on the quality of communications on the control channel.