An Improved CF-MAC Protocol for VANET

Vehicular Ad hoc Network (VANET) is one of the emerging research areas in the mobile computing field which is considered as future technology and promising topic in computer science and computer networks. Which provides road safety, updated traffic information, and infotainment. VANET consists of a large number of vehicles moving in high speeds while broadcasting important information like safety and control information which must be sent with high priority. Crowded networks like VANET having many vehicles competing to reserve the channel to send critical information which may lead to high collision scenarios, and therefore, there must be a protocol to send this kind of information with high reliability, low data loss and with no collision. In this research a collision-free protocol will be proposed to manage the channel access among competing vehicles to eliminate the collisions which occur rapidly in VANET especially in dense situations, the proposed protocol hereinafter will be called (I-MAC) protocol expected to enhance the channel performance, achieve load balancing, fairness, and decrease message loss and enhance reliability, The evaluation criteria will examine the channel throughput, message delay, and message loss; the results show that the overall channel performance with regard to collision and packet loss ratio is improved

Communication technologies to design vehicle-to-vehicle and vehile-to-infrastructures applications

Intelligent Transport Systems use communication technologies to offer real-time traffic information services to road users and government managers. Vehicular Ad Hoc Networks is an important component of ITS where vehicles communicate with other vehicles and road-side infrastructures, analyze and process received information, and make decisions according to that. However, features like high vehicle speeds, constant mobility, varying topology, traffic density, etc. induce challenges that make conventional wireless technologies unsuitable for vehicular networks. This paper focuses on the process of designing efficient vehicle-to-vehicle and vehicle-to road-side infrastructure applications.Peer ReviewedPostprint (published version

PENGEMBANGAN PROTOKOL MULTICAST AODV DENGAN MEMPERHITUNGKAN JARAK EUCLIDEAN BERDASARKAN POSISI, KECEPATAN DAN DELAY TRANSMISI PADA VANET

Protokol routing dalam jaringan Vehicular Ad hoc Network (VANET) dikembangkan untuk memperbaiki kinerja transmisi paket data pada jaringan antar kendaraan. Berbagai pendekatan konektivitas antar jaringan kendaraan terus dilakukan karena VANET memiliki karakteristik yang berbeda dengan Mobile Ad hoc Network (MANET) yaitu dalam hal kecepatan node. Protokol Multicast Ad hoc On-Demand Distance Vector (MAODV) yang termasuk protokol routing reaktif dengan transmisi multicast banyak dilakukan penelitian dan peningkatan dengan berbagai pendekatan. Pada penelitian ini dilakukan pengembangan protokol routing MAODV dengan memperhitungkan jarak Euclidean antar node berdasarkan posisi, kecepatan dan delay transmisi. Protokol routing Multicast Adaptif Structured-tree berbasis Reactive Euclidean Node Knowledge (MAS-BRENK) diusulkan untuk memperbaiki mekanisme multicast tree maintenance yaitu proses join dan prune. Perhitungan bobot weighted product digunakan untuk menghitung bobot antar node berdasarkan jarak euclidean, kecepatan dan delay transmisi. Protokol yang diusulkan tersebut diujikan ke dalam skenario jalan perkotaan. Hasil pengujian menunjukkan bahwa protokol MAS-BRENK mengalami peningkatan pengiriman paket MACT sebesar 1.3% dan penerimaan paket MACT dengan flag prune sebesar 8.2%. Selain itu penerimaan paket MACT dengan flag join menurun sebesar 1.2%. Hasil akhir yang didapatkan yaitu peningkatan PDR sebanyak 0.2% dan throughput sebanyak 2%, serta penurunan delay 14.3% dari protokol MAODV

Vehicle density in VANET Applications

This paper analyzes how street-level traffic data affects routing in VANETs applications. First, we offer a general review about which protocols and techniques would fit best for VANET applications. We selected five main technical aspects (Transmission, Routing, Quality of Service, Security and Location) that we consider are differential aspects of VANETs from current Ad-Hoc Networks. Second, the paper analyzes how to configure each technical aspect according to the goal of a wide range of VANET applications. Third, we look at the routing aspect in depth, specifically focusing on how vehicle density affects routing, which protocols are the best option when there is a high/low density, etc. Finally, this research implements a sensor technology, based on an acoustics sensor that has been deployed around the city of Xalapa in México, to obtain reliable information on the real-time density of vehicles. The levels of density were discretized and the obtained data samples were used to feed a traffic simulator, which allowed us to obtain a global picture of the density of the central area of the city. According to the specific levels of vehicle density at a specific moment and place, VANET applications may adapt the routing protocol in a real-time wayPeer ReviewedPostprint (published version

EVALUACIÓN DEL DESEMPEÑO DE REDES 802.11P/WAVE EN LA TRANSMISIÓN DE DATOS, VOZ Y VIDEO IP

RESUMEN ANALITICOEl acceso inalámbrico en entornos vehiculares (redes vehiculares) se presenta y estudia bajo características comunes, tales como la arquitectura de red, configuraciones, etapas de implementación, posibles protocolos de enrutamiento y la capa MAC, lo que permite la comprensión sobre cómo funciona, cómo se implementa e identificar variaciones del estándar original. Además, este artículo ofrece una evaluación del desempeño de la transmisión de datos, voz y video IP, y el análisis de algunos factores a considerar cuando los servicios se proporcionan en entornos vehiculares. El objetivo del estudio es la enmienda IEEE 802.11p/WAVE.PALABRAS CLAVES: Redes Vehiculares, Wi-Fi, 802.11pPERFORMANCE EVALUATION OF 802.11P/WAVE NETWORKS IN DATA, VOICE AND VIDEO TRANSMISSIONANALYTICAL SUMMARYWireless access in vehicular environments (vehicular networks) is presented and studied under common features, such as network architecture, configurations, implementation stages, possible routing protocols and MAC layer, which allows the understanding of how it works, how it is implemented and identify variations from the original standard. Also, this paper gives a performance assessment transmission of data, voice and IP Video, and the analysis of some factors to consider when services are provide in vehicular environments. The study focus is the amendment IEEE 802.11p/WAVE.KEY WORDS:Vehicular Networks; Wi-Fi; 802.11

EVALUACIÓN DEL DESEMPEÑO DE REDES 802.11P/WAVE EN LA TRANSMISIÓN DE DATOS, VOZ Y VIDEO IP

RESUMEN ANALITICOEl acceso inalámbrico en entornos vehiculares (redes vehiculares) se presenta y estudia bajo características comunes, tales como la arquitectura de red, configuraciones, etapas de implementación, posibles protocolos de enrutamiento y la capa MAC, lo que permite la comprensión sobre cómo funciona, cómo se implementa e identificar variaciones del estándar original. Además, este artículo ofrece una evaluación del desempeño de la transmisión de datos, voz y video IP, y el análisis de algunos factores a considerar cuando los servicios se proporcionan en entornos vehiculares. El objetivo del estudio es la enmienda IEEE 802.11p/WAVE.PALABRAS CLAVES: Redes Vehiculares, Wi-Fi, 802.11pPERFORMANCE EVALUATION OF 802.11P/WAVE NETWORKS IN DATA, VOICE AND VIDEO TRANSMISSIONANALYTICAL SUMMARYWireless access in vehicular environments (vehicular networks) is presented and studied under common features, such as network architecture, configurations, implementation stages, possible routing protocols and MAC layer, which allows the understanding of how it works, how it is implemented and identify variations from the original standard. Also, this paper gives a performance assessment transmission of data, voice and IP Video, and the analysis of some factors to consider when services are provide in vehicular environments. The study focus is the amendment IEEE 802.11p/WAVE.KEY WORDS:Vehicular Networks; Wi-Fi; 802.11

A Comprehensive Approach to WSN-Based ITS Applications: A Survey

In order to perform sensing tasks, most current Intelligent Transportation Systems (ITS) rely on expensive sensors, which offer only limited functionality. A more recent trend consists of using Wireless Sensor Networks (WSN) for such purpose, which reduces the required investment and enables the development of new collaborative and intelligent applications that further contribute to improve both driving safety and traffic efficiency. This paper surveys the application of WSNs to such ITS scenarios, tackling the main issues that may arise when developing these systems. The paper is divided into sections which address different matters including vehicle detection and classification as well as the selection of appropriate communication protocols, network architecture, topology and some important design parameters. In addition, in line with the multiplicity of different technologies that take part in ITS, it does not consider WSNs just as stand-alone systems, but also as key components of heterogeneous systems cooperating along with other technologies employed in vehicular scenarios