Premium
Computation of minimum transmit power for network connectivity in vehicular ad hoc networks formed by vehicles with random communication range
Author(s) -
Neelakantan P.C.,
Babu A.V.
Publication year - 2014
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.2390
Subject(s) - computer science , wireless ad hoc network , transmitter power output , computer network , network packet , path loss , vehicular ad hoc network , range (aeronautics) , channel (broadcasting) , traverse , wireless network , wireless , telecommunications , transmitter , materials science , geodesy , composite material , geography
SUMMARY In this paper, we consider a vehicular ad hoc network used for distributing traffic information and investigate the minimum uniform transmit power, to be used by all vehicles, sufficient to guarantee network connectivity, in the presence of channel fading. As opposed to the conventional graph theoretic approach, in this paper, the network connectivity problem is analyzed from a physical layer perspective in which a given multi‐hop path joining a pair of vehicles in the network is considered to be connected if and only if the average route BER corresponding to this path meets a target requirement. The analysis considers the communication range of each vehicle to be a random variable. The random communication range model is relevant for connectivity analysis because it can account for variability in the communication links and thus will be able to accurately estimate the network connectivity probability after network setup. We derive closed form analytical expression for the minimum transmit power sufficient to ensure network connectivity. We also derive analytical expression for the maximum number of hops, a packet can traverse satisfying the route BER constraint, for a given transmit power. The validity of our theoretical analysis is verified by extensive simulation studies. Copyright © 2012 John Wiley & Sons, Ltd.