Hi, I don't know if you're just talking about changing the distance, in order to do it you just have to increase the transmitted power Pt_ and check the variable distCST_:
#To have 240m,using freespace set opt(prop) Propagation/FreeSpace ;# radio-propagation model #(...) Antenna/OmniAntenna set X_ 0 Antenna/OmniAntenna set Y_ 0 Antenna/OmniAntenna set Z_ 1.5 Antenna/OmniAntenna set Gt_ 1.0 ;#be aware the Gt_ and Gr_ are setted as the Antenna/OmniAntenna set Gr_ 1.0 ;#fixed value 1.0 Phy/WirelessPhy set freq_ 2.4e9 Phy/WirelessPhy set L_ 1.0 Phy/WirelessPhy set Pt_ 1.838e-5 ;#power needed to have 240m of distance Phy/WirelessPhy set RXThresh_ 3.16e-14 Phy/WirelessPhy set CSThresh_ 3.16e-14 ;#Sensivity=-105 dbm Phy/WirelessPhy set CPThresh_ 10 output:highestAntennaZ_ = 1.5, distCST_ = 239.9 To increase distance higher than that increase Phy/WirelessPhy set Pt_ , distCST_ will go above 240m. I don't know but the article "Simulate 802.11b Channel within NS2" might be useful for you (you can search it on google). kindly, Tiago Junqueira
