00001 /* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */ 00002 00003 /* 00004 * shadowing.h 00005 * Copyright (C) 2000 by the University of Southern California 00006 * $Id: shadowing.h,v 1.4 2005/08/25 18:58:09 johnh Exp $ 00007 * 00008 * This program is free software; you can redistribute it and/or 00009 * modify it under the terms of the GNU General Public License, 00010 * version 2, as published by the Free Software Foundation. 00011 * 00012 * This program is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00015 * GNU General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU General Public License along 00018 * with this program; if not, write to the Free Software Foundation, Inc., 00019 * 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. 00020 * 00021 * 00022 * The copyright of this module includes the following 00023 * linking-with-specific-other-licenses addition: 00024 * 00025 * In addition, as a special exception, the copyright holders of 00026 * this module give you permission to combine (via static or 00027 * dynamic linking) this module with free software programs or 00028 * libraries that are released under the GNU LGPL and with code 00029 * included in the standard release of ns-2 under the Apache 2.0 00030 * license or under otherwise-compatible licenses with advertising 00031 * requirements (or modified versions of such code, with unchanged 00032 * license). You may copy and distribute such a system following the 00033 * terms of the GNU GPL for this module and the licenses of the 00034 * other code concerned, provided that you include the source code of 00035 * that other code when and as the GNU GPL requires distribution of 00036 * source code. 00037 * 00038 * Note that people who make modified versions of this module 00039 * are not obligated to grant this special exception for their 00040 * modified versions; it is their choice whether to do so. The GNU 00041 * General Public License gives permission to release a modified 00042 * version without this exception; this exception also makes it 00043 * possible to release a modified version which carries forward this 00044 * exception. 00045 * 00046 */ 00047 00048 /* 00049 * Shadowing propation model, including the path-loss model. 00050 * This statistcal model is applicable for both outdoor and indoor. 00051 * Wei Ye, weiye@isi.edu, 2000 00052 */ 00053 00054 00055 #ifndef shadowing_h 00056 #define shadowing_h 00057 00058 #include <packet-stamp.h> 00059 #include <wireless-phy.h> 00060 #include <propagation.h> 00061 #include <rng.h> 00062 #include <float.h> 00063 00064 class Shadowing : public Propagation { 00065 public: 00066 Shadowing(); 00067 ~Shadowing(); 00068 virtual double Pr(PacketStamp *tx, PacketStamp *rx, WirelessPhy *ifp); 00069 virtual double getDist(double Pr, double Pt, double Gt, double Gr, 00070 double hr, double ht, double L, double lambda) { 00071 return DBL_MAX; 00072 } 00073 virtual int command(int argc, const char*const* argv); 00074 00075 protected: 00076 RNG *ranVar; // random number generator for normal distribution 00077 00078 double pathlossExp_; // path-loss exponent 00079 double std_db_; // shadowing deviation (dB), 00080 double dist0_; // close-in reference distance 00081 int seed_; // seed for random number generator 00082 }; 00083 00084 #endif 00085
1.7.1