A Novel PER Degradation Model for VANETs

A Novel PER Degradation Model for VANETs

ABSTRACT:

In this work, we present a new channel modeling approach for vehicular networks, where there are frequent topology changes due to a high grade of mobility. The Markov-based trace analysis is used to analyze packet error rate degradation dynamics in relation to both Doppler shift and signal to noise ratio. After the model definition, we applied an additional polynomial regression to remove dependence on boundary parameters. Differing from existing works, our idea takes into account the stochastic behavior of wireless links, in spite of most of the existing closed forms. We considered MATLAB for evaluation of the proposed model. We also propose numerical results as a possible application of our study.

EXISTING SYSTEM:

• Many works in literature, take into account the modeling of channel conditions in VANET by considering path-loss and shadowing effects, which are directly related to the distance between the pairs of nodes.
• In addition they evaluate the received signal strength by using classical Rayleigh or Nakagami fading/shadowing approaches, disregarding the relationship between the Bit Error Rate (BER) and the Packet Error Rate (PER)

DISADVANTAGES OF EXISTING SYSTEM:

Neither do they take into account boundary conditions, such as average SNR or Doppler Shift (DS), which are directly related to mobility.

PROPOSED SYSTEM:

The proposed idea consists of two different steps:

1. a) Once the model was implemented, we collected many results in terms of PER, varying SNR and DS values. The obtained Log-Files (LFs) were analyzed through the MTA algorithm, obtaining a Markov model that can describe a stochastic channel behavior that is similar to that analyzed;
2. b) We applied a polynomial regression was applied to the Markov chains parameters, to remove dependence on SNR and DS. Thus, we give a closed form for binding channel degradations to host mobility and environmental conditions as a contribution in this paper.

ADVANTAGES OF PROPOSED SYSTEM:

The result of this proposal is a Markov channel modeling approach, suitable for VANETs environments. The obtained parameters are expressed in a closed form, and are directly related to DS and SNR.

SYSTEM ARCHITECTURE:

SYSTEM REQUIREMENTS:

HARDWARE REQUIREMENTS:

• System :         Pentium IV 2.4 GHz.
• Hard Disk :         40 GB.
• Floppy Drive : 44 Mb.
• Monitor : 15 VGA Colour.
• Mouse :
• Ram : 512 Mb.

SOFTWARE REQUIREMENTS:

• Operating system : Windows XP/7/LINUX.
• Implementation : NS2
• NS2 Version : 2.28
• Front End : OTCL (Object Oriented Tool Command Language)
• Tool : Cygwin (To simulate in Windows OS)

REFERENCE:

Peppino Fazio, Member, IEEE, Mauro Tropea, Fellow, IEEE, and Floriano De Rango, Member, IEEE, “A Novel PER Degradation Model for VANETs”, IEEE COMMUNICATIONS LETTERS, VOL. 19, NO. 5, MAY 2015.