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00001 // file:        SnrEval80211.cc
00002 //
00003 //  author:      Marc L�bbers
00004 // copyright:   (c) by Tralafitty
00005 //              Telecommunication Networks Group
00006 //              TU-Berlin
00007 // email:       loebbers@tkn.tu-berlin.de
00008 
00009 // part of: framework implementation developed by tkn description: - a
00010 // snrEval extension for the use with the other 802.11 modules
00011 
00012 
00013 #include "SnrEval80211.h"
00014 #include "Consts80211.h"
00015 #include "AirFrame_m.h"
00016 
00017 
00018 Define_Module(SnrEval80211);
00019 
00020 void SnrEval80211::initialize(int stage)
00021 {
00022     SnrEval::initialize(stage);
00023 
00024     if (stage == 0)
00025     {
00026         EV << "initializing stage 0\n";
00027         if (bitrate != 1E+6 && bitrate != 2E+6 && bitrate != 5.5E+6 && bitrate != 11E+6)
00028             error("Wrong bit rate for 802.11, valid values are 1E+6, 2E+6, 5.5E+6 or 11E+6");
00029         headerLength = 192;     //has to be 192; this makes sure it is!
00030     }
00031 }
00032 
00033 
00039 double SnrEval80211::calcDuration(cPacket *frame)
00040 {
00041     EV << "bits without header: " << frame->getBitLength() -
00042         headerLength << ", bits header: " << headerLength << endl;
00043     return ((frame->getBitLength() - headerLength) / bitrate + headerLength / BITRATE_HEADER);
00044 }