Hi again ! I just saw that a character in the file was making some troubles. (the 'é' in line 7) So i replaced it and I attach the new version.
Sorry Mathieu On 26/10/2007, Van der Haegen Mathieu <[EMAIL PROTECTED]> wrote: > > Hi everybody. > > I did a small python script that I think could be added in the examples > for TOSSIM-T2: > It's really useful for generating a grid topology network and uses the > same model as the JAVA tool from T1. Anyway it permits to get rid of that > tool and is really easy to use. > I'm still working on a similar script that adds moving nodes into this > static grid but it's still a bit too dirty to share with you so it's for > soon. > Anyway I attach the script to this email so If one of the TINYOS masters > want to add it into the CVS it's ok for me (and I would be proud of it ;) > Let me know what you think about it. > > Mathieu > > -- > Van der Haegen Mathieu > http://www.ulb.ac.be/di/map/mavdhaeg/ > http://www.ulb.ac.be/di/labo/ > [EMAIL PROTECTED] > -- Van der Haegen Mathieu http://www.ulb.ac.be/di/map/mavdhaeg/ http://www.ulb.ac.be/di/labo/ [EMAIL PROTECTED]
############ static_sim_net.py ############################### # this is a simple script to simulate a network # of nodes in a grid topology. # it is fully configurable and the options are just downside. # Author : Van der Haegen Mathieu <[EMAIL PROTECTED]> # Machine Learning Group # Universite Libre de Bruxelles ############################################################## ############# imports #################################### from TOSSIM import * import math import random import sys ############ parameters ################################## #the DBG Channels we want to listen to. DBG_CHANNELS = ['Boot','Radio','Queue'] #Set to True if you wan to log the dbg statements LOG_DATAS = False #The filename of the log file (if used) LOG_FILENAME = "sim_log.txt" #The maximum simulation time (after all the nodes have booted) MAX_TIME = 1000 * 10000000000 #equal 1000 seconds #Size of the area on X axis (in meters) AREA_SIZE_X = 200 #Size of the area on Y axis (in meters) AREA_SIZE_Y = 200 #Number of static nodes STATIC_N = 25 #X size of the static grid GRID_SIZE_X = 5 #Y size of the static grid GRID_SIZE_Y = 5 #radio transmission params #theses params have been taken from inputFile.java from : #http://www.tinyos.net/tinyos-2.x/doc/html/tutorial/usc-topologies.html #from USC-ANRG. #the rssi model used is the log-normal shadowing model use D0 = 1 #reference distance (in meters) PLD0 = 30.1 #52.1 #power decay for the reference distance D0 (in dB) PLE = 3.3 #path loss exponent: rate at which signal decays SSD = 3.0 #standard deviation of the noise (randomness due to multipath effect) NOISE_TRACE_FILE = "meyer-heavy.txt" #the file used to add some real noise to the simulation of the radio. NOISE_SAMPLES = 150 #the maximal number of noise samples used for this process (if the file has less samples then less samples will be used) ####### FUNCTIONS ######################################## #this function return a gain value for a certain distance def gain_from_dist(dist): GAIN = - PLD0 - 10 * PLE * math.log10(dist/D0) + random.gauss(0,SSD) return GAIN #this function return the distance between nodes a and b #if the parameter a is givent as [X,Y] def dist(a,b): return math.sqrt(math.pow(a[0]-b[0],2) + math.pow(a[1]-b[1],2)) ####### MAIN CODE ######################################## #if we log the datas we open a file. if LOG_DATAS == True: f = open(LOG_FILENAME, "w") #we start tossim core t = Tossim([]) #for all the DBG channels we want to listen to. for i in DBG_CHANNELS: t.addChannel(i, sys.stdout) print 'listening to channel ',i if LOG_DATAS == True: t.addChannel(i, f) #we get the radio from Tossim. r = t.radio() print 'creating static nodes positions' #first we set the positions of the static nodes. if STATIC_N != GRID_SIZE_X * GRID_SIZE_Y : raise AttributeError,'Error : The number of static nodes must be equal to grid size x * grid size y' #the distance between nodes in the static grid. stepx = AREA_SIZE_X / (GRID_SIZE_X+1) stepy = AREA_SIZE_Y / (GRID_SIZE_Y+1) #this puts all the static nodes positions in static_nodes_pos static_nodes_pos = [(i*stepx,j*stepy) for i in range (1,GRID_SIZE_X+1) for j in range (1,GRID_SIZE_Y+1)] print 'creating radio links' #now we set the links for the static nodes. for n in range(0,STATIC_N): for i in range(0,GRID_SIZE_X): for j in range(0,GRID_SIZE_Y): ntmp = (i*GRID_SIZE_X+j) if (n != ntmp): dtmp=dist(static_nodes_pos[n],static_nodes_pos[ntmp]) gtmp=gain_from_dist(dtmp) #print 'add link from ',n+1,' to ',ntmp+1,' with dist ',dtmp,' with gain ',gtmp r.add(n+1,ntmp+1,gtmp) r.add(ntmp+1,n+1,gtmp) print 'creating noise traces for links' #adding noise trace for sensors: noise = open(NOISE_TRACE_FILE, "r") lines = noise.readlines() cnt = 0 for line in lines: if (cnt > NOISE_SAMPLES): break else: cnt=cnt+1 str = line.strip() if (str != ""): val = int(str) for i in range(0,STATIC_N): t.getNode(i).addNoiseTraceReading(val) for i in range(0,STATIC_N): print "Creating noise model for ",i; t.getNode(i).createNoiseModel() print 'setting ON all the nodes' #then we set ON all the static nodes for i in range(0,STATIC_N): t.getNode(i+1).bootAtTime(10000+1000*i) print 'waiting for all the nodes to be ON' #then we run the simulation until all nodes are booted while(not t.getNode(STATIC_N).isOn()): t.runNextEvent() #we save the time before stime = t.time() print 'Starting simulation' print 'Time before main loop',stime #until MAX time. while(MAX_TIME > t.time()-stime): t.runNextEvent()
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