Fuzzy cognitive Vehicular Ad hoc Networks
- 1 October 2011
Abstract
The Wireless Access in Vehicular Environments (WAVE) protocol stack is one of the most important protocols proposed to standardize and allocate spectrum for vehicle-to-vehicle and vehicle-to-infrastructure communication. In a previous work, we proved that WAVE faces a spectrum scarcity problem which hinders reliable exchange of safety information. To overcome this problem, we proposed a system that applies cognitive networks principles to WAVE as to increase the spectrum allocated to the control channel (CCH) by the IEEE 802.11p amendment, where all safety information is transmitted. However, the decision making process in our previous work did not utilize the extra spectrum efficiently as it was not allocated according to the contention level experienced by the vehicle. In this paper, we suggest a system that employs a fuzzy logic system (FLS) to dynamically assign additional spectrum from the ISM band to the CCH. This system, which we call FCVANET, assigns the minimum necessary additional bandwidth to relieve the contention. The FLS takes as input 2 parameters, the message delay and the un-transmitted packets and utilizes a feedback loop. Our simulations show that the proposed system allocates bandwidth more efficiently in accordance with the contention level faced by the vehicles. The system succeeds to relieve contention by reducing delay and the number of un-transmitted packets.Keywords
This publication has 15 references indexed in Scilit:
- Extending the DSRC's control channel using cognitive networking concepts and Fuzzy LogicPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2011
- Performance and Reliability of DSRC Vehicular Safety Communication: A Formal AnalysisEURASIP Journal on Wireless Communications and Networking, 2009
- How much of dsrc is available for non-safety use?Published by Association for Computing Machinery (ACM) ,2008
- Overhaul of ieee 802.11 modeling and simulation in ns-2Published by Association for Computing Machinery (ACM) ,2007
- A new stochastic cellular automaton model on traffic flow and its jamming phase transitionJournal of Physics A: General Physics, 2006
- Vehicle-to-vehicle safety messaging in DSRCPublished by Association for Computing Machinery (ACM) ,2004
- Performance evaluation of safety applications over DSRC vehicular ad hoc networksPublished by Association for Computing Machinery (ACM) ,2004
- Broadcast reception rates and effects of priority access in 802.11-based vehicular ad-hoc networksPublished by Association for Computing Machinery (ACM) ,2004
- Computing TCP's Retransmission TimerPublished by RFC Editor ,2000
- Analytical results for the steady state of traffic flow models with stochastic delayPhysical Review E, 1998