tailieunhanh - Báo cáo hóa học: " Fuzzy-assisted social-based routing for urban vehicular environments"

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : Fuzzy-assisted social-based routing for urban vehicular environments | Khokhar et al. EURASIP Journal on Wireless Communications and Networking 2011 2011 178 EURASIP Journal on . http content 20ii i i78 Wireless Communications and Networking a SpringerOpen Journal RESEARCH Open Access Fuzzy-assisted social-based routing for urban vehicular environments 1 1 23 2 Rashid Hafeez Khokhar Rafidah Md Noor Kayhan Zrar Ghafoor Chih-Heng Ke and Md Asri Ngadi Abstract In the autonomous environment of Vehicular Ad hoc NETwork VANET vehicles randomly move with high speed and rely on each other for successful data transmission process. The routing can be difficult or impossible to predict in such intermittent vehicles connectivity and highly dynamic topology. The existing routing solutions do not consider the knowledge that behaviour patterns exist in real-time urban vehicular networks. In this article we propose a fuzzy-assisted social-based routing FAST protocol that takes the advantage of social behaviour of humans on the road to make optimal and secure routing decisions. FAST uses prior global knowledge of real-time vehicular traffic for packet routing from the source to the destination. In FAST fuzzy inference system leverages friendship mechanism to make critical decisions at intersections which is based on prior global knowledge of realtime vehicular traffic information. The simulation results in urban vehicular environment for with and without obstacles scenario show that the FAST performs best in terms of packet delivery ratio with upto 32 increase average delay 80 decrease and hops count 50 decrease compared to the state of the art VANET routing solutions. 1 Introduction Recently the social-based networks have been built to bring different groups of people within range for potential communication. Such social-based networks are not only used to connect the computers for global communications network but it can also be used to connect vehicles in urban environments. Social-based routing in Vehicular Ad hoc NETwork