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vectorcache.cpp

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/*******************************************************************************
 * This file is part of openWNS (open Wireless Network Simulator)
 * _____________________________________________________________________________
 *
 * Copyright (C) 2004-2007
 * Chair of Communication Networks (ComNets)
 * Kopernikusstr. 5, D-52074 Aachen, Germany
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 * fax: ++49-241-80-22242
 * email: info@openwns.org
 * www: http://www.openwns.org
 * _____________________________________________________________________________
 *
 * openWNS is free software; you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License version 2 as published by the
 * Free Software Foundation;
 *
 * openWNS is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
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#include <RISE/transceiver/cache/vectorcache.hpp>
#include <RISE/transceiver/transmitter.hpp>
#include <RISE/transceiver/receiver.hpp>
#include <RISE/transmissionobjects/transmissionobject.hpp>
#include <RISE/antenna/Antenna.hpp>
#include <RISE/stations/station.hpp>
#include <WNS/Position.hpp>
#include <RISE/manager/systemmanager.hpp>
#include <RISE/transceiver/cache/propcacheentry.hpp>
#include <WNS/PowerRatio.hpp>

using namespace rise;
using namespace std;

VectorCache::VectorCache(receiver::ReceiverInterface* r)
    : PropagationCache(r, "Vector"),
      pathlossShadowGain(FrequencyHash())
{
}

VectorCache::~VectorCache()
{
}

wns::Ratio VectorCache::getLoss(Transmitter* t, double freq) {
    //if frequency is not in hash attach it
    if(pathlossShadowGain.find(freq)==pathlossShadowGain.end())
        attachFrequency(freq);
    int tIndex = getIndex(t);
    PropCacheEntry& vectorEntry = pathlossShadowGain[freq].at(tIndex);
    if(!vectorEntry.isValid()){
        updatePropEntry(vectorEntry, t, freq);
    }
    return vectorEntry.getTotalLoss();
}


int VectorCache::getIndex(Transmitter* t)
{
    PointerHashMap<Transmitter*, long int>::iterator itr=transmitter2Index.find(t);
    if(itr==transmitter2Index.end())
    {
        unsigned long int index = 0;
        FrequencyIterator fItrEnd = frequencies.end();
        assert(frequencies.size()>0);
        transmitters.push_back(t);
        for(FrequencyIterator fItr = frequencies.begin();
            fItr!=fItrEnd;
            ++fItr)
        {
            index = pathlossShadowGain[*fItr].size();
            CacheVector p = std::vector<PropCacheEntry>(index+1);
            pathlossShadowGain[*fItr] = p;
        }
        transmitter2Index[t] = index;
        invalidatePropagationEntries(t);
        itr=transmitter2Index.find(t);
    }
    return itr->second;

}


void VectorCache::invalidatePropagationEntries(Transmitter* t)
{
    if(frequencies.size()>0)
    {
        unsigned long int index = getIndex(t);
        FrequencyIterator itrFEnd = frequencies.end();
        for(FrequencyIterator itrF = frequencies.begin();itrF!=itrFEnd;++itrF)
        {
            PropCacheEntry& vectorEntry = pathlossShadowGain[*itrF].at(index);
            updatePropEntry(vectorEntry, t, (*itrF));
        }
    }
}


void VectorCache::invalidatePropagationEntries()
{
    FrequencyIterator itrFEnd = frequencies.end();
    for(FrequencyIterator itrF = frequencies.begin();itrF!=itrFEnd;++itrF)
    {
        TransmitterIterator itrTEnd = transmitters.end();
       for(TransmitterIterator itrT = transmitters.begin();itrT!=itrTEnd;++itrT)
       {
           unsigned long int index = getIndex(*itrT);
           PropCacheEntry& vectorEntry = pathlossShadowGain[*itrF].at(index);
           updatePropEntry(vectorEntry, *itrT, (*itrF));
        }
    }
}
void VectorCache::attachFrequency(double freq)
{
    unsigned long int numTx = (transmitter2Index.size()+1);
    pathlossShadowGain[freq] = std::vector<PropCacheEntry>(numTx);
    TransmitterIterator itrTEnd = transmitters.end();

    for(TransmitterIterator itrT = transmitters.begin();itrT!=itrTEnd;++itrT)
    {
        unsigned long int index = getIndex(*itrT);
        PropCacheEntry& vectorEntry = pathlossShadowGain[freq].at(index);
        updatePropEntry(vectorEntry, *itrT, freq);
    }
    frequencies.push_back(freq);
}

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