Hi, I've got the same problem. In tcl I haven't found a solution. I thougth there is something easy like "set strength [$node set signalstrength]" but it seems there isn't such a think... :( Because of that I go to the C++-Source-Code. After a little bit of searching I found the file "wireless-phy.cc" and there the function "sendUp". I think there the variable "Pr" is the signal strength (because later in the function "Pr" is compared with "CSTresh_" and "RXTresh_" wich a used to simulated if a paket is recieved correct or not). But now I had the problem that "Pr" alway had got the same value and I don't know why. I went back to my tcl file and play a little bit with my settings. As I changed "set opt(prop) Propagation/TwoRayGround" to "set opt(prop) Propagation/FreeSpace" and start a simulation, I've got an output on my console like "time: 0.008566: d: 31.622777, Pr: 2.949347e-09" (and there the Pr is chaniging!). First I was wondered about that, but then I looked into the file "propagation.cc" and there I found in the function Pr() "printf("%lf: d: %lf, Pr: %e\n", Scheduler::instance().clock(), d, Pr);". So I copy that and put it into the file "tworayground.cc" at the same position (the function Pr) and now it seems to work. But I always have a question: Why is Pr in "tworayground" changing and in "wireless-phy" not? And is it the correct position to read out the signal strength? I've alway looked into the file "mac-802_11.cc" and the function "send" but there "Pr" also seems not to work correct (there it is alwas "1.600278e-02" or "-1"...) What do I have to change? And a last thing: I want to have the signal strength in dBm. Because of that I made "10*log10(Pr)" but I'm not sure if I have to use "10*log10(Pr/0.001)" instead (because 1mW is the referece value for dBm and I don't know if it is include in Pr or not...) I hope anybody can help me with my problem(s). Thanks! Greets Daniel Rother
Zitat von angelina socratous <[EMAIL PROTECTED]>: > > > I have a topology with some access points and some wireless nodes > attached to them. If a new node wants to join the network how can i > get the signal strength which the new node receives from each access > point? > Should i use c++? If someone has a tutorial for this task it would > be very helpful. > > Thanks, Angelina > _________________________________________________________________ > Explore the seven wonders of the world > http://search.msn.com/results.aspx?q=7+wonders+world&mkt=en-US&form=QBRE >