Hello everyone,
I am trying to evaluate the performance of a vehicular ad hoc network (VANET) based protocol over Nakagami-m fading channel using ns-2 simulator. I came across various recommended parameters, specially when it comes to setting the "m" value for defining fading severity. Following are my resources:
1) "An empirical model for probability of packet reception in vehicular ad hoc networks", 2009, recommends a Nakagami-m = 3.
2) "Broadcast reception rates and effects of priority access in 802.11-based vehicular ad-hoc networks", 2004, recommends the following:
Nakagami-m=3, if distance between vehicles are less than 50m.
Nakagami-m=1, if distance between vehicles are more than 150m.
Nakagami-m=1.5, if distance between vehicles are in between 50m & 150m.
3) "IEEE 802.11-based one-hop broadcast communications: understanding transmission success and failure under different radio propagation environments", 2006, recommends Nakagami-m = 1, 3 and 5, while emphasizing on m = 3.
4) "A comparative analysis of DSRC and 802.11 over Vehicular Ad hoc Networks", recommends two scenarios i.e. urban (m=1) and freeway (m=1.5).
I would like to hear opinion of the research community on which Nakagami-m parameter is the most suitable for evaluating VANETs protocols over freeway (highway) scenarios. I am also in search for the suitable corresponding Nakagami-m fading parameters while using ns-2 simulation platform.
Thanks...
Hi,
Your question is already very specific and asking for the m-parameter of Nakagami. But the selection of a radio propagation model depends mostly on the scenario that you want to simulate and finally investigate. Several measurement campaigns have proposed more specific radio propagation model for V2V Communication, e.g.:
Abbas, Taimoor, et al. "A Measurement Based Shadow Fading Model for Vehicle-to-Vehicle Network Simulations." arXiv preprint arXiv:1203.3370 (2012).
Christoph Sommer, David Eckhoff, Reinhard German and Falko Dressler, "A Computationally Inexpensive Empirical Model of IEEE 802.11p Radio Shadowing in Urban Environments," Proceedings of 8th IEEE/IFIP Conference on Wireless On demand Network Systems and Services (WONS 2011), Bardonecchia, Italy, January 2011, pp. 84-90.
Michele Segata, Bastian Bloessl, Stefan Joerer, Christoph Sommer, Renato Lo Cigno and Falko Dressler, "Vehicle Shadowing Distribution Depends on Vehicle Type: Results of an Experimental Study," Proceedings of 5th IEEE Vehicular Networking Conference (VNC 2013), Boston, MA, December 2013, pp. 242-245.
Felix Erlacher, Florian Klingler, Christoph Sommer and Falko Dressler, "On the Impact of Street Width on 5.9 GHz Radio Signal Propagation in Vehicular Networks," Proceedings of 11th IEEE/IFIP Conference on Wireless On demand Network Systems and Services (WONS 2014), Obergurgl, Austria, April 2014, pp. 143-146.
He, Ruisi, et al. "Vehicle-to-Vehicle Propagation Models With Large Vehicle Obstructions." 1-12.
I hope this papers help you to understand why radio channel modeling for vehicular networks is more than just using the "right" parameters for the Nakagami Model.
Cheers,
Stefan Joerer
Hi,
hope this gives you a diretion:
Vehicle-to-Vehicle Communication: Fair Transmit Power Control for Safety-Critical Information by Marc Torrent-Moreno et al.
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