00001 /* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */ 00002 /* 00003 * Copyright (c) 1997 Regents of the University of California. 00004 * All rights reserved. 00005 * 00006 * Redistribution and use in source and binary forms, with or without 00007 * modification, are permitted provided that the following conditions 00008 * are met: 00009 * 1. Redistributions of source code must retain the above copyright 00010 * notice, this list of conditions and the following disclaimer. 00011 * 2. Redistributions in binary form must reproduce the above copyright 00012 * notice, this list of conditions and the following disclaimer in the 00013 * documentation and/or other materials provided with the distribution. 00014 * 3. All advertising materials mentioning features or use of this software 00015 * must display the following acknowledgement: 00016 * This product includes software developed by the Computer Systems 00017 * Engineering Group at Lawrence Berkeley Laboratory. 00018 * 4. Neither the name of the University nor of the Laboratory may be used 00019 * to endorse or promote products derived from this software without 00020 * specific prior written permission. 00021 * 00022 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 00023 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00024 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00025 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 00026 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00027 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00028 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00029 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00030 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00031 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00032 * SUCH DAMAGE. 00033 */ 00034 /* Ported from CMU/Monarch's code, nov'98 -Padma. 00035 propagation.h 00036 00037 superclass of all propagation models 00038 */ 00039 00040 #ifndef ns_propagation_h 00041 #define ns_propagation_h 00042 00043 #define SPEED_OF_LIGHT 300000000 // 3 * 10^8 m/s 00044 #define PI 3.1415926535897 00045 00046 00047 #include <topography.h> 00048 #include <phy.h> 00049 #include <wireless-phy.h> 00050 #include <packet-stamp.h> 00051 00052 class PacketStamp; 00053 class WirelessPhy; 00054 /*====================================================================== 00055 Progpagation Models 00056 00057 Using postion and wireless transmission interface properties, 00058 propagation models compute the power with which a given 00059 packet will be received. 00060 00061 Not all propagation models will be implemented for all interface 00062 types, since a propagation model may only be appropriate for 00063 certain types of interfaces. 00064 00065 ====================================================================== */ 00066 00067 class Propagation : public TclObject { 00068 00069 public: 00070 Propagation() : name(NULL), topo(NULL) {} 00071 00072 // calculate the Pr by which the receiver will get a packet sent by 00073 // the node that applied the tx PacketStamp for a given inteface 00074 // type 00075 virtual double Pr(PacketStamp *tx, PacketStamp *rx, Phy *); 00076 virtual double Pr(PacketStamp *tx, PacketStamp *rx, WirelessPhy *); 00077 virtual int command(int argc, const char*const* argv); 00078 00079 // get interference distance 00080 virtual double getDist(double Pr, double Pt, double Gt, double Gr, 00081 double hr, double ht, double L, double lambda); 00082 00083 00084 // Friis free space equation, likely to be used by other propagation models. 00085 double Friis(double Pt, double Gt, double Gr, double lambda, double L, double d); 00086 // Pt -- transmitted signal power 00087 // Gt -- transmitter antenna gain 00088 // Gr -- receiver antenna gain 00089 // lambda -- wavelength 00090 // L -- system loss (L >= 1) 00091 // d -- distance between transmitter and receiver 00092 // return -- received signal power 00093 00094 protected: 00095 char *name; 00096 Topography *topo; 00097 }; 00098 00099 00100 // Friis free space propagation model 00101 class FreeSpace : public Propagation { 00102 public: 00103 // FreeSpace(); 00104 virtual double Pr(PacketStamp *tx, PacketStamp *rx, WirelessPhy *ifp); 00105 virtual double getDist(double Pr, double Pt, double Gt, double Gr, 00106 double ht, double hr, double L, double lambda); 00107 }; 00108 00109 #endif /* __propagation_h__ */ 00110
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