Hello, 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, Osama Rehman
