Re: [ns] help ! for increase communication rage to 1600 m
Read the section of transmission models in NS-2 manual. You should check which transmission model (e.g. FreeSpace, TwoRayGround, Shadowing) is in use. You should try to adjust the RXThreah_ using threshold.c as described in the NS manual. regards, Faisal Phitsanu Eamsomboon wrote: My name is Phitsanu from Thailand , I use ns-2 for to do my research . May I trouble you for ask you some question , I try to increase Transmission rage is 1600 m by increase Pt but It still can communicate in 500 m range , How can I increase transmission rage is 1600 m if I use TwoRayGrounf model. How can I calculate , Please recommend me
Re: [ns] help ! for increase communication rage to 1600 m
In the two-ray ground model,the receiver power at distance d is given by following formula: Pr(d) =Pt * Gt * Gr * ht^2 * hr^2 / (d^4) where ht is the transmitter antenna height and hr is the receiver antenna height. If the distance between sender and receiver is relative large, the formula can be simplified as: Pr(d) = Ct * Pt / (d^4) where Ct is a constant so combining above equation with the sensitivity threshold, we have the radio coverage in the two ray ground model is a disk of radius 4VCtPt One way to increase the communication range is either increase the power at transmitter or increase the sensitivity threshold of receiver. For increasing the sensitivity at receiver you can adjust the CSThresh_ and RXThresh_. Regards, Wayan KMITL Thailand Phitsanu Eamsomboon [EMAIL PROTECTED] wrote: My name is Phitsanu from Thailand , I use ns-2 for to do my research . May I trouble you for ask you some question , I try to increase Transmission rage is 1600 m by increase Pt but It still can communicate in 500 m range , How can I increase transmission rage is 1600 m if I use TwoRayGrounf model. How can I calculate , Please recommend me - Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos more.
Re: [ns] help ! for increase communication rage to 1600 m
Hi, adjusting transmission power and thresholds is not sufficient for such a long distance. You also need to adjust MAC timeout values. Citing from my own mail with subject Re: [ns] MAC/802.11 STA error on ACK - The Linux driver for the madwifi cards includes a utility to calculate all relevant timeout values. Maybe it is a starting point for you. If you do not have access to a madwifi card I could ask a colleague for assistence. Look here for some information: http://forums.wi-fiplanet.com/showthread.php?t=6488 Faisal Aslam schrieb: Read the section of transmission models in NS-2 manual. You should check which transmission model (e.g. FreeSpace, TwoRayGround, Shadowing) is in use. You should try to adjust the RXThreah_ using threshold.c as described in the NS manual. regards, Faisal Phitsanu Eamsomboon wrote: My name is Phitsanu from Thailand , I use ns-2 for to do my research . May I trouble you for ask you some question , I try to increase Transmission rage is 1600 m by increase Pt but It still can communicate in 500 m range , How can I increase transmission rage is 1600 m if I use TwoRayGrounf model. How can I calculate , Please recommend me !!! Regards, Daniel. -- Dr.-Ing. Daniel Mahrenholz rt-solutions.de GmbH Oberländer Ufer 190a D-50968 Köln Web: www.rt-solutions.de rt-solutions.de networks you can trust.
Re: [ns] help ! for increase communication rage to 1600 m
See the following two web sites for related information: http://hpds.ee.ncku.edu.tw/~smallko/ns2/range_en.htm http://140.116.72.80/~smallko/ns2/11b.htm Mohammed AbuHajar Phitsanu Eamsomboon [EMAIL PROTECTED] wrote: My name is Phitsanu from Thailand , I use ns-2 for to do my research . May I trouble you for ask you some question , I try to increase Transmission rage is 1600 m by increase Pt but It still can communicate in 500 m range , How can I increase transmission rage is 1600 m if I use TwoRayGrounf model. How can I calculate , Please recommend me - Moody friends. Drama queens. Your life? Nope! - their life, your story. Play Sims Stories at Yahoo! Games.
Re: [ns] help ! for increase communication rage to 1600 m
Il giorno mar, 07/08/2007 alle 12.47 +0700, Phitsanu Eamsomboon ha scritto: How can I increase transmission rage is 1600 m if I use TwoRayGrounf model. How can I calculate , Please recommend me Hi, you have to follow this two steps procedure: 1) first you should compute propagation loss at distance 1600 m, using your specific scenario parameters (Pt, frequency, propagation model, ...). Ns-2 has an utility named threshold that does this; it is contained in directory ns-2.31/indep-utils/propagation/. 2) You should set RX and Carrier Sense threshold parameters of wireless channel, using value obtained from threshold utility: Phy/WirelessPhy set CSThresh_ YOUR VALUE Phy/WirelessPhy set RXThresh_ YOUR VALUE Best Regards. Busanelli Stefano
[ns] help ! for increase communication rage to 1600 m
My name is Phitsanu from Thailand , I use ns-2 for to do my research . May I trouble you for ask you some question , I try to increase Transmission rage is 1600 m by increase Pt but It still can communicate in 500 m range , How can I increase transmission rage is 1600 m if I use TwoRayGrounf model. How can I calculate , Please recommend me
