134 lines
3.7 KiB
C++
134 lines
3.7 KiB
C++
/*
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* Copyright 2009 Free Software Foundation, Inc.
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*
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* This software is distributed under the terms of the GNU Affero Public License.
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* See the COPYING file in the main directory for details.
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*
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* This use of this software may be subject to additional restrictions.
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* See the LEGAL file in the main directory for details.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "PowerManager.h"
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#include <Logger.h>
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#include <Globals.h>
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#include <GSMConfig.h>
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#include <TRXManager.h>
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#include <ControlCommon.h>
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extern TransceiverManager gTRX;
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using namespace GSM;
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void PowerManager::increasePower()
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{
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int maxAtten = gConfig.getNum("GSM.PowerManager.MaxAttenDB");
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int minAtten = gConfig.getNum("GSM.PowerManager.MinAttenDB");
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if (mAtten==minAtten) {
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LOG(DEBUG) << "power already at maximum";
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return;
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}
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mAtten--; // raise power by reducing attenuation
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if (mAtten<minAtten) mAtten=minAtten;
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if (mAtten>maxAtten) mAtten=maxAtten;
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LOG(INFO) << "power increased to -" << mAtten << " dB";
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mRadio->setPower(mAtten);
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}
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void PowerManager::reducePower()
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{
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int maxAtten = gConfig.getNum("GSM.PowerManager.MaxAttenDB");
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int minAtten = gConfig.getNum("GSM.PowerManager.MinAttenDB");
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if (mAtten==maxAtten) {
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LOG(WARN) << "power already at minimum";
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return;
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}
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mAtten++; // reduce power be increasing attenuation
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if (mAtten<minAtten) mAtten=minAtten;
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if (mAtten>maxAtten) mAtten=maxAtten;
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LOG(INFO) << "power decreased to -" << mAtten << " dB";
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mRadio->setPower(mAtten);
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}
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// internal method, does the control step
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void PowerManager::internalControlStep()
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{
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unsigned target = gConfig.getNum("GSM.PowerManager.TargetT3122");
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LOG(DEBUG) << "Avg T3122 " << mAveragedT3122 << ", target " << target;
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// Adapt the power.
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if (mAveragedT3122 > target) reducePower();
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else increasePower();
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}
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void PowerManager::sampleT3122()
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{
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// Tweak it down a little just in case there's no activity.
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mSamples[mNextSampleIndex] = gBTS.shrinkT3122();
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unsigned numSamples = gConfig.getNum("GSM.PowerManager.NumSamples");
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mNextSampleIndex = (mNextSampleIndex + 1) % numSamples;
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long sum = 0;
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for (unsigned i=0; i<numSamples; i++) sum += mSamples[i];
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mAveragedT3122 = sum / numSamples;
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}
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PowerManager::PowerManager()
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: mAveragedT3122(gConfig.getNum("GSM.PowerManager.TargetT3122"))
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, mAtten(gConfig.getNum("GSM.PowerManager.MaxAttenDB"))
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, mNextSampleIndex(0)
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{
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// We don't actually set any power here, since the radio may not exist yet.
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assert(gConfig.getNum("GSM.PowerManager.NumSamples")<100);
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bzero(mSamples,sizeof(mSamples));
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LOG(INFO) << "setting initial power to -" << mAtten << " dB";
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}
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// This is called to actually do the control
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void PowerManager::serviceLoop()
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{
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while (1) {
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usleep(1000*gConfig.getNum("GSM.PowerManager.SamplePeriod"));
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sampleT3122();
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if (mLast.elapsed() < gConfig.getNum("GSM.PowerManager.Period")) continue;
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internalControlStep();
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mLast.now();
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}
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}
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void* GSM::PowerManagerServiceLoopAdapter(PowerManager *pm)
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{
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pm->serviceLoop();
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return NULL;
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}
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void PowerManager::start()
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{
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mRadio = gTRX.ARFCN(0);
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mRadio->setPower(mAtten);
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mThread.start((void*(*)(void*))PowerManagerServiceLoopAdapter,this);
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}
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// vim: ts=4 sw=4
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