Re: [ns] Nakagami-m fading Parameters for VANETs
Hi Osama, If you're interested in modeling the 5.9 GHz DSRC band, the most comprehensive characterization I'm aware of can be found in [1]. The software in [2] is a patch for ns-2.35 that implements the model in [1]. For more background and a deeper study on VANET simulation, please refer to [3]. [1] L. Cheng, B. E. Henty, D. D. Stancil, F. Bai, and P. Mudalige, “Mobile Vehicle-to-Vehicle Narrow-Band Channel Measurement and Characterization of the 5.9 GHz Dedicated Short Range Communication (DSRC) Frequency Band”, IEEE Journal on Selected Areas in Communications, Vol. 25, No. 8, October 2007. [2] http://masimum.inf.um.es/fjrm/development/lognormalnakagami6/ [3] Francisco J. Ros, Juan A. Martinez and Pedro M. Ruiz, “A Survey on Modeling and Simulation of Vehicular Networks: Communications, Mobility, and Tools”, Computer Communications, Vol. 43, pp. 1-15, May 2014. http://masimum.inf.um.es/fjrm/wp-uploads/Ros-COMCOM14.pdf Best, -- Francisco J. Ros, PhD Dept. of Information and Communications Engineering University of Murcia, Murcia (Spain) http://masimum.inf.um.es/fjrm/ El 26/07/2014, a las 15:00, Osama Rehman escribió: 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
Re: [ns] Nakagami-m fading Parameters for VANETs
Hi again, I just noticed that you're interested in highway (and not urban) scenarios. Then, forget reference [1] and focus on [3] and [2]. Best, -- Francisco J. Ros, PhD Dept. of Information and Communications Engineering University of Murcia, Murcia (Spain) http://masimum.inf.um.es/fjrm/ El 28/07/2014, a las 17:35, Francisco Javier Ros Muñoz escribió: Hi Osama, If you're interested in modeling the 5.9 GHz DSRC band, the most comprehensive characterization I'm aware of can be found in [1]. The software in [2] is a patch for ns-2.35 that implements the model in [1]. For more background and a deeper study on VANET simulation, please refer to [3]. [1] L. Cheng, B. E. Henty, D. D. Stancil, F. Bai, and P. Mudalige, “Mobile Vehicle-to-Vehicle Narrow-Band Channel Measurement and Characterization of the 5.9 GHz Dedicated Short Range Communication (DSRC) Frequency Band”, IEEE Journal on Selected Areas in Communications, Vol. 25, No. 8, October 2007. [2] http://masimum.inf.um.es/fjrm/development/lognormalnakagami6/ [3] Francisco J. Ros, Juan A. Martinez and Pedro M. Ruiz, “A Survey on Modeling and Simulation of Vehicular Networks: Communications, Mobility, and Tools”, Computer Communications, Vol. 43, pp. 1-15, May 2014. http://masimum.inf.um.es/fjrm/wp-uploads/Ros-COMCOM14.pdf Best, -- Francisco J. Ros, PhD Dept. of Information and Communications Engineering University of Murcia, Murcia (Spain) http://masimum.inf.um.es/fjrm/ El 26/07/2014, a las 15:00, Osama Rehman escribió: 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
Re: [ns] How to add new protocol in ns2
Dear Vaibhav, It seems that you're not updating ns-lib.tcl. Check this: http://masimum.inf.um.es/fjrm/wp-uploads/nsrt-howto/html/node20.html Regards, fran El 17/03/2013, a las 13:16, Vaibhav Ambhire escribió: i wrote a new agent and modified the relevant files (makefile,packet.h,ns-default. tcl,ns-packet.tcl) ,then i executed ./configure and make. It executed well. But when i want to run any tcl file i get this error (ns: [code ommited because of length] : invalid command name Agent/security_packet while executing Agent/security_packet set packetSize_ 200). Please any one know the solution, then help me. If anybody know the exact steps to add a new agent in ns2, then please forward the relevant material on the same email id... Yhanks, Vaibhav -- Francisco J. Ros, PhD Dept. of Information and Communications Engineering University of Murcia, Murcia (Spain) http://masimum.inf.um.es/fjrm/
