dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2008, 2009, 2010 Free Software Foundation, Inc. |
| 3 | * |
| 4 | * This software is distributed under the terms of the GNU Public License. |
| 5 | * See the COPYING file in the main directory for details. |
| 6 | * |
| 7 | * This use of this software may be subject to additional restrictions. |
| 8 | * See the LEGAL file in the main directory for details. |
| 9 | |
| 10 | This program is free software: you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation, either version 3 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 22 | */ |
| 23 | |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 24 | #include <stdio.h> |
| 25 | #include "Transceiver.h" |
| 26 | #include <Logger.h> |
| 27 | |
ttsou | 2173abf | 2012-08-08 00:51:31 +0000 | [diff] [blame] | 28 | #ifdef HAVE_CONFIG_H |
| 29 | #include "config.h" |
| 30 | #endif |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 31 | |
Alexander Chemeris | d734e2d | 2013-06-16 14:30:58 +0400 | [diff] [blame] | 32 | using namespace GSM; |
| 33 | |
kurtis.heimerl | ec842de | 2012-11-23 08:37:32 +0000 | [diff] [blame] | 34 | #define USB_LATENCY_INTRVL 10,0 |
ttsou | 2173abf | 2012-08-08 00:51:31 +0000 | [diff] [blame] | 35 | |
| 36 | #if USE_UHD |
kurtis.heimerl | ec842de | 2012-11-23 08:37:32 +0000 | [diff] [blame] | 37 | # define USB_LATENCY_MIN 6,7 |
ttsou | 2173abf | 2012-08-08 00:51:31 +0000 | [diff] [blame] | 38 | #else |
kurtis.heimerl | ec842de | 2012-11-23 08:37:32 +0000 | [diff] [blame] | 39 | # define USB_LATENCY_MIN 1,1 |
ttsou | 2173abf | 2012-08-08 00:51:31 +0000 | [diff] [blame] | 40 | #endif |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 41 | |
Thomas Tsou | fa3a787 | 2013-10-17 21:23:34 -0400 | [diff] [blame] | 42 | /* Number of running values use in noise average */ |
| 43 | #define NOISE_CNT 20 |
ttsou | e8dde02 | 2012-12-06 15:43:55 +0000 | [diff] [blame] | 44 | |
Thomas Tsou | f078273 | 2013-10-29 15:55:47 -0400 | [diff] [blame] | 45 | TransceiverState::TransceiverState() |
Thomas Tsou | 15d743e | 2014-01-25 02:34:03 -0500 | [diff] [blame^] | 46 | : mRetrans(false), mNoiseLev(0.0), mNoises(NOISE_CNT) |
Thomas Tsou | f078273 | 2013-10-29 15:55:47 -0400 | [diff] [blame] | 47 | { |
| 48 | for (int i = 0; i < 8; i++) { |
| 49 | chanType[i] = Transceiver::NONE; |
| 50 | fillerModulus[i] = 26; |
| 51 | chanResponse[i] = NULL; |
| 52 | DFEForward[i] = NULL; |
| 53 | DFEFeedback[i] = NULL; |
| 54 | |
| 55 | for (int n = 0; n < 102; n++) |
| 56 | fillerTable[n][i] = NULL; |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | TransceiverState::~TransceiverState() |
| 61 | { |
| 62 | for (int i = 0; i < 8; i++) { |
| 63 | delete chanResponse[i]; |
| 64 | delete DFEForward[i]; |
| 65 | delete DFEFeedback[i]; |
| 66 | |
| 67 | for (int n = 0; n < 102; n++) |
| 68 | delete fillerTable[n][i]; |
| 69 | } |
| 70 | } |
| 71 | |
Thomas Tsou | 15d743e | 2014-01-25 02:34:03 -0500 | [diff] [blame^] | 72 | void TransceiverState::init(size_t slot, signalVector *burst, bool fill) |
Thomas Tsou | f078273 | 2013-10-29 15:55:47 -0400 | [diff] [blame] | 73 | { |
Thomas Tsou | 15d743e | 2014-01-25 02:34:03 -0500 | [diff] [blame^] | 74 | signalVector *filler; |
| 75 | |
| 76 | for (int i = 0; i < 102; i++) { |
| 77 | if (fill) |
| 78 | filler = new signalVector(*burst); |
| 79 | else |
| 80 | filler = new signalVector(burst->size()); |
| 81 | |
| 82 | fillerTable[i][slot] = filler; |
| 83 | } |
Thomas Tsou | f078273 | 2013-10-29 15:55:47 -0400 | [diff] [blame] | 84 | } |
| 85 | |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 86 | Transceiver::Transceiver(int wBasePort, |
| 87 | const char *TRXAddress, |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 88 | size_t wSPS, size_t wChans, |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 89 | GSM::Time wTransmitLatency, |
| 90 | RadioInterface *wRadioInterface) |
Thomas Tsou | d647ec5 | 2013-10-29 15:17:34 -0400 | [diff] [blame] | 91 | : mBasePort(wBasePort), mAddr(TRXAddress), |
Thomas Tsou | a0179e3 | 2013-11-14 15:52:04 -0500 | [diff] [blame] | 92 | mTransmitLatency(wTransmitLatency), mClockSocket(NULL), |
| 93 | mRadioInterface(wRadioInterface), mSPSTx(wSPS), mSPSRx(1), mChans(wChans), |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 94 | mOn(false), mTxFreq(0.0), mRxFreq(0.0), mPower(-10), mMaxExpectedDelay(0) |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 95 | { |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 96 | GSM::Time startTime(random() % gHyperframe,0); |
| 97 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 98 | mRxLowerLoopThread = new Thread(32768); |
| 99 | mTxLowerLoopThread = new Thread(32768); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 100 | |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 101 | mTransmitDeadlineClock = startTime; |
| 102 | mLastClockUpdateTime = startTime; |
| 103 | mLatencyUpdateTime = startTime; |
| 104 | mRadioInterface->getClock()->set(startTime); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 105 | |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 106 | txFullScale = mRadioInterface->fullScaleInputValue(); |
| 107 | rxFullScale = mRadioInterface->fullScaleOutputValue(); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 108 | } |
| 109 | |
| 110 | Transceiver::~Transceiver() |
| 111 | { |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 112 | sigProcLibDestroy(); |
Thomas Tsou | d647ec5 | 2013-10-29 15:17:34 -0400 | [diff] [blame] | 113 | |
| 114 | delete mClockSocket; |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 115 | |
| 116 | for (size_t i = 0; i < mChans; i++) { |
| 117 | mTxPriorityQueues[i].clear(); |
| 118 | delete mCtrlSockets[i]; |
| 119 | delete mDataSockets[i]; |
| 120 | } |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 121 | } |
Thomas Tsou | 83e0689 | 2013-08-20 16:10:01 -0400 | [diff] [blame] | 122 | |
Thomas Tsou | 15d743e | 2014-01-25 02:34:03 -0500 | [diff] [blame^] | 123 | bool Transceiver::init(bool filler) |
Thomas Tsou | 83e0689 | 2013-08-20 16:10:01 -0400 | [diff] [blame] | 124 | { |
Thomas Tsou | e1ce925 | 2013-11-13 22:40:44 -0500 | [diff] [blame] | 125 | int d_srcport, d_dstport, c_srcport, c_dstport; |
Thomas Tsou | f078273 | 2013-10-29 15:55:47 -0400 | [diff] [blame] | 126 | signalVector *burst; |
| 127 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 128 | if (!mChans) { |
| 129 | LOG(ALERT) << "No channels assigned"; |
| 130 | return false; |
| 131 | } |
| 132 | |
Thomas Tsou | c1f7c42 | 2013-10-11 13:49:55 -0400 | [diff] [blame] | 133 | if (!sigProcLibSetup(mSPSTx)) { |
Thomas Tsou | 83e0689 | 2013-08-20 16:10:01 -0400 | [diff] [blame] | 134 | LOG(ALERT) << "Failed to initialize signal processing library"; |
| 135 | return false; |
| 136 | } |
| 137 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 138 | mDataSockets.resize(mChans); |
| 139 | mCtrlSockets.resize(mChans); |
| 140 | |
| 141 | mControlServiceLoopThreads.resize(mChans); |
| 142 | mTxPriorityQueueServiceLoopThreads.resize(mChans); |
| 143 | mRxServiceLoopThreads.resize(mChans); |
| 144 | |
| 145 | mTxPriorityQueues.resize(mChans); |
| 146 | mReceiveFIFO.resize(mChans); |
| 147 | mStates.resize(mChans); |
| 148 | |
Thomas Tsou | d647ec5 | 2013-10-29 15:17:34 -0400 | [diff] [blame] | 149 | mClockSocket = new UDPSocket(mBasePort, mAddr.c_str(), mBasePort + 100); |
Thomas Tsou | d647ec5 | 2013-10-29 15:17:34 -0400 | [diff] [blame] | 150 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 151 | for (size_t i = 0; i < mChans; i++) { |
Thomas Tsou | e1ce925 | 2013-11-13 22:40:44 -0500 | [diff] [blame] | 152 | c_srcport = mBasePort + 2 * i + 1; |
| 153 | c_dstport = mBasePort + 2 * i + 101; |
| 154 | d_srcport = mBasePort + 2 * i + 2; |
| 155 | d_dstport = mBasePort + 2 * i + 102; |
| 156 | |
| 157 | mCtrlSockets[i] = new UDPSocket(c_srcport, mAddr.c_str(), c_dstport); |
| 158 | mDataSockets[i] = new UDPSocket(d_srcport, mAddr.c_str(), d_dstport); |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 159 | } |
Thomas Tsou | 83e0689 | 2013-08-20 16:10:01 -0400 | [diff] [blame] | 160 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 161 | for (size_t i = 0; i < mChans; i++) { |
| 162 | mControlServiceLoopThreads[i] = new Thread(32768); |
| 163 | mTxPriorityQueueServiceLoopThreads[i] = new Thread(32768); |
| 164 | mRxServiceLoopThreads[i] = new Thread(32768); |
| 165 | |
| 166 | for (size_t n = 0; n < 8; n++) { |
| 167 | burst = modulateBurst(gDummyBurst, 8 + (n % 4 == 0), mSPSTx); |
| 168 | scaleVector(*burst, txFullScale); |
Thomas Tsou | 15d743e | 2014-01-25 02:34:03 -0500 | [diff] [blame^] | 169 | mStates[i].init(n, burst, filler && !i); |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 170 | delete burst; |
| 171 | } |
Thomas Tsou | 83e0689 | 2013-08-20 16:10:01 -0400 | [diff] [blame] | 172 | } |
| 173 | |
| 174 | return true; |
| 175 | } |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 176 | |
Thomas Tsou | a2fe91a | 2013-11-13 22:48:11 -0500 | [diff] [blame] | 177 | void Transceiver::addRadioVector(size_t chan, BitVector &bits, |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 178 | int RSSI, GSM::Time &wTime) |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 179 | { |
Thomas Tsou | a2fe91a | 2013-11-13 22:48:11 -0500 | [diff] [blame] | 180 | signalVector *burst; |
| 181 | radioVector *radio_burst; |
| 182 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 183 | if (chan >= mTxPriorityQueues.size()) { |
| 184 | LOG(ALERT) << "Invalid channel " << chan; |
| 185 | return; |
| 186 | } |
| 187 | |
Thomas Tsou | 2d0c00b | 2013-11-14 15:28:23 -0500 | [diff] [blame] | 188 | if (wTime.TN() > 7) { |
| 189 | LOG(ALERT) << "Received burst with invalid slot " << wTime.TN(); |
| 190 | return; |
| 191 | } |
| 192 | |
Thomas Tsou | a2fe91a | 2013-11-13 22:48:11 -0500 | [diff] [blame] | 193 | burst = modulateBurst(bits, 8 + (wTime.TN() % 4 == 0), mSPSTx); |
| 194 | scaleVector(*burst, txFullScale * pow(10, -RSSI / 10)); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 195 | |
Thomas Tsou | a2fe91a | 2013-11-13 22:48:11 -0500 | [diff] [blame] | 196 | radio_burst = new radioVector(wTime, burst); |
| 197 | |
| 198 | mTxPriorityQueues[chan].write(radio_burst); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 199 | } |
| 200 | |
Thomas Tsou | 15d743e | 2014-01-25 02:34:03 -0500 | [diff] [blame^] | 201 | void Transceiver::updateFillerTable(size_t chan, radioVector *burst) |
| 202 | { |
| 203 | int TN, modFN; |
| 204 | TransceiverState *state = &mStates[chan]; |
| 205 | |
| 206 | TN = burst->getTime().TN(); |
| 207 | modFN = burst->getTime().FN() % state->fillerModulus[TN]; |
| 208 | |
| 209 | delete state->fillerTable[modFN][TN]; |
| 210 | state->fillerTable[modFN][TN] = burst->getVector(); |
| 211 | burst->setVector(NULL); |
| 212 | } |
| 213 | |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 214 | void Transceiver::pushRadioVector(GSM::Time &nowTime) |
| 215 | { |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 216 | int TN, modFN; |
| 217 | radioVector *burst; |
| 218 | TransceiverState *state; |
| 219 | std::vector<signalVector *> bursts(mChans); |
| 220 | std::vector<bool> zeros(mChans); |
Thomas Tsou | 15d743e | 2014-01-25 02:34:03 -0500 | [diff] [blame^] | 221 | std::vector<bool> filler(mChans, true); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 222 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 223 | for (size_t i = 0; i < mChans; i ++) { |
| 224 | state = &mStates[i]; |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 225 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 226 | while ((burst = mTxPriorityQueues[i].getStaleBurst(nowTime))) { |
| 227 | LOG(NOTICE) << "dumping STALE burst in TRX->USRP interface"; |
Thomas Tsou | 15d743e | 2014-01-25 02:34:03 -0500 | [diff] [blame^] | 228 | if (state->mRetrans) |
| 229 | updateFillerTable(i, burst); |
Thomas Tsou | a2fe91a | 2013-11-13 22:48:11 -0500 | [diff] [blame] | 230 | delete burst; |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 231 | } |
| 232 | |
| 233 | TN = nowTime.TN(); |
| 234 | modFN = nowTime.FN() % state->fillerModulus[TN]; |
| 235 | |
| 236 | bursts[i] = state->fillerTable[modFN][TN]; |
| 237 | zeros[i] = state->chanType[TN] == NONE; |
| 238 | |
| 239 | if ((burst = mTxPriorityQueues[i].getCurrentBurst(nowTime))) { |
Thomas Tsou | a2fe91a | 2013-11-13 22:48:11 -0500 | [diff] [blame] | 240 | bursts[i] = burst->getVector(); |
Thomas Tsou | 15d743e | 2014-01-25 02:34:03 -0500 | [diff] [blame^] | 241 | |
| 242 | if (state->mRetrans) { |
| 243 | updateFillerTable(i, burst); |
| 244 | } else { |
| 245 | burst->setVector(NULL); |
| 246 | filler[i] = false; |
| 247 | } |
| 248 | |
Thomas Tsou | a2fe91a | 2013-11-13 22:48:11 -0500 | [diff] [blame] | 249 | delete burst; |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 250 | } |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 251 | } |
| 252 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 253 | mRadioInterface->driveTransmitRadio(bursts, zeros); |
| 254 | |
Thomas Tsou | 15d743e | 2014-01-25 02:34:03 -0500 | [diff] [blame^] | 255 | for (size_t i = 0; i < mChans; i++) { |
| 256 | if (!filler[i]) |
| 257 | delete bursts[i]; |
| 258 | } |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 259 | } |
| 260 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 261 | void Transceiver::setModulus(size_t timeslot, size_t chan) |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 262 | { |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 263 | TransceiverState *state = &mStates[chan]; |
| 264 | |
| 265 | switch (state->chanType[timeslot]) { |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 266 | case NONE: |
| 267 | case I: |
| 268 | case II: |
| 269 | case III: |
| 270 | case FILL: |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 271 | state->fillerModulus[timeslot] = 26; |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 272 | break; |
| 273 | case IV: |
| 274 | case VI: |
| 275 | case V: |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 276 | state->fillerModulus[timeslot] = 51; |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 277 | break; |
| 278 | //case V: |
| 279 | case VII: |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 280 | state->fillerModulus[timeslot] = 102; |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 281 | break; |
ttsou | fc40a84 | 2013-06-09 22:38:18 +0000 | [diff] [blame] | 282 | case XIII: |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 283 | state->fillerModulus[timeslot] = 52; |
ttsou | fc40a84 | 2013-06-09 22:38:18 +0000 | [diff] [blame] | 284 | break; |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 285 | default: |
| 286 | break; |
| 287 | } |
| 288 | } |
| 289 | |
| 290 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 291 | Transceiver::CorrType Transceiver::expectedCorrType(GSM::Time currTime, |
| 292 | size_t chan) |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 293 | { |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 294 | TransceiverState *state = &mStates[chan]; |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 295 | unsigned burstTN = currTime.TN(); |
| 296 | unsigned burstFN = currTime.FN(); |
| 297 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 298 | switch (state->chanType[burstTN]) { |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 299 | case NONE: |
| 300 | return OFF; |
| 301 | break; |
| 302 | case FILL: |
| 303 | return IDLE; |
| 304 | break; |
| 305 | case I: |
| 306 | return TSC; |
| 307 | /*if (burstFN % 26 == 25) |
| 308 | return IDLE; |
| 309 | else |
| 310 | return TSC;*/ |
| 311 | break; |
| 312 | case II: |
ttsou | 2064297 | 2013-03-27 22:00:25 +0000 | [diff] [blame] | 313 | return TSC; |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 314 | break; |
| 315 | case III: |
| 316 | return TSC; |
| 317 | break; |
| 318 | case IV: |
| 319 | case VI: |
| 320 | return RACH; |
| 321 | break; |
| 322 | case V: { |
| 323 | int mod51 = burstFN % 51; |
| 324 | if ((mod51 <= 36) && (mod51 >= 14)) |
| 325 | return RACH; |
| 326 | else if ((mod51 == 4) || (mod51 == 5)) |
| 327 | return RACH; |
| 328 | else if ((mod51 == 45) || (mod51 == 46)) |
| 329 | return RACH; |
| 330 | else |
| 331 | return TSC; |
| 332 | break; |
| 333 | } |
| 334 | case VII: |
| 335 | if ((burstFN % 51 <= 14) && (burstFN % 51 >= 12)) |
| 336 | return IDLE; |
| 337 | else |
| 338 | return TSC; |
| 339 | break; |
ttsou | fc40a84 | 2013-06-09 22:38:18 +0000 | [diff] [blame] | 340 | case XIII: { |
| 341 | int mod52 = burstFN % 52; |
| 342 | if ((mod52 == 12) || (mod52 == 38)) |
| 343 | return RACH; |
| 344 | else if ((mod52 == 25) || (mod52 == 51)) |
| 345 | return IDLE; |
| 346 | else |
| 347 | return TSC; |
| 348 | break; |
| 349 | } |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 350 | case LOOPBACK: |
| 351 | if ((burstFN % 51 <= 50) && (burstFN % 51 >=48)) |
| 352 | return IDLE; |
| 353 | else |
| 354 | return TSC; |
| 355 | break; |
| 356 | default: |
| 357 | return OFF; |
| 358 | break; |
| 359 | } |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 360 | } |
Thomas Tsou | fa3a787 | 2013-10-17 21:23:34 -0400 | [diff] [blame] | 361 | |
Thomas Tsou | 30421a7 | 2013-11-13 23:14:48 -0500 | [diff] [blame] | 362 | /* |
| 363 | * Detect RACH synchronization sequence within a burst. No equalization |
| 364 | * is used or available on the RACH channel. |
| 365 | */ |
| 366 | bool Transceiver::detectRACH(TransceiverState *state, |
| 367 | signalVector &burst, |
| 368 | complex &, float &toa) |
| 369 | { |
| 370 | float threshold = 6.0; |
| 371 | |
| 372 | return detectRACHBurst(burst, threshold, mSPSRx, &, &toa); |
| 373 | } |
| 374 | |
| 375 | /* |
| 376 | * Detect normal burst training sequence midamble. Update equalization |
| 377 | * state information and channel estimate if necessary. Equalization |
| 378 | * is currently disabled. |
| 379 | */ |
Thomas Tsou | a0179e3 | 2013-11-14 15:52:04 -0500 | [diff] [blame] | 380 | bool Transceiver::detectTSC(TransceiverState *state, signalVector &burst, |
Thomas Tsou | 30421a7 | 2013-11-13 23:14:48 -0500 | [diff] [blame] | 381 | complex &, float &toa, GSM::Time &time) |
| 382 | { |
| 383 | int tn = time.TN(); |
| 384 | float chanOffset, threshold = 5.0; |
Thomas Tsou | a0179e3 | 2013-11-14 15:52:04 -0500 | [diff] [blame] | 385 | bool noise, needDFE = false, estimateChan = false; |
Thomas Tsou | 30421a7 | 2013-11-13 23:14:48 -0500 | [diff] [blame] | 386 | double elapsed = time - state->chanEstimateTime[tn]; |
| 387 | signalVector *chanResp; |
| 388 | |
| 389 | /* Check equalization update state */ |
Thomas Tsou | fb827d0 | 2013-11-16 16:14:12 -0500 | [diff] [blame] | 390 | if (needDFE && ((elapsed > 50) || (!state->chanResponse[tn]))) { |
Thomas Tsou | 30421a7 | 2013-11-13 23:14:48 -0500 | [diff] [blame] | 391 | delete state->DFEForward[tn]; |
| 392 | delete state->DFEFeedback[tn]; |
| 393 | state->DFEForward[tn] = NULL; |
| 394 | state->DFEFeedback[tn] = NULL; |
| 395 | |
| 396 | estimateChan = true; |
| 397 | } |
| 398 | |
| 399 | /* Detect normal burst midambles */ |
| 400 | if (!analyzeTrafficBurst(burst, mTSC, threshold, mSPSRx, &, |
| 401 | &toa, mMaxExpectedDelay, estimateChan, |
| 402 | &chanResp, &chanOffset)) { |
| 403 | return false; |
| 404 | } |
| 405 | |
Thomas Tsou | a0179e3 | 2013-11-14 15:52:04 -0500 | [diff] [blame] | 406 | noise = state->mNoiseLev; |
| 407 | state->SNRestimate[tn] = amp.norm2() / (noise * noise + 1.0); |
Thomas Tsou | 30421a7 | 2013-11-13 23:14:48 -0500 | [diff] [blame] | 408 | |
| 409 | /* Set equalizer if unabled */ |
| 410 | if (needDFE && estimateChan) { |
| 411 | state->chanResponse[tn] = chanResp; |
| 412 | state->chanRespOffset[tn] = chanOffset; |
| 413 | state->chanRespAmplitude[tn] = amp; |
| 414 | |
| 415 | scaleVector(*chanResp, complex(1.0, 0.0) / amp); |
| 416 | |
| 417 | designDFE(*chanResp, state->SNRestimate[tn], |
| 418 | 7, &state->DFEForward[tn], &state->DFEFeedback[tn]); |
| 419 | |
| 420 | state->chanEstimateTime[tn] = time; |
| 421 | } |
| 422 | |
| 423 | return true;; |
| 424 | } |
| 425 | |
| 426 | /* |
| 427 | * Demodulate GMSK burst using equalization if requested. Otherwise |
| 428 | * demodulate by direct rotation and soft slicing. |
| 429 | */ |
| 430 | SoftVector *Transceiver::demodulate(TransceiverState *state, |
| 431 | signalVector &burst, complex amp, |
| 432 | float toa, size_t tn, bool equalize) |
| 433 | { |
| 434 | if (equalize) { |
| 435 | scaleVector(burst, complex(1.0, 0.0) / amp); |
| 436 | return equalizeBurst(burst, |
| 437 | toa - state->chanRespOffset[tn], |
| 438 | mSPSRx, |
| 439 | *state->DFEForward[tn], |
| 440 | *state->DFEFeedback[tn]); |
| 441 | } |
| 442 | |
| 443 | return demodulateBurst(burst, mSPSRx, amp, toa); |
| 444 | } |
| 445 | |
| 446 | /* |
| 447 | * Pull bursts from the FIFO and handle according to the slot |
| 448 | * and burst correlation type. Equalzation is currently disabled. |
| 449 | */ |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 450 | SoftVector *Transceiver::pullRadioVector(GSM::Time &wTime, int &RSSI, |
| 451 | int &timingOffset, size_t chan) |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 452 | { |
Thomas Tsou | 30421a7 | 2013-11-13 23:14:48 -0500 | [diff] [blame] | 453 | bool success, equalize = false; |
| 454 | complex amp; |
| 455 | float toa, pow, max = -1.0, avg = 0.0; |
Thomas Tsou | e90a42b | 2013-11-13 23:38:09 -0500 | [diff] [blame] | 456 | int max_i = -1; |
Thomas Tsou | 30421a7 | 2013-11-13 23:14:48 -0500 | [diff] [blame] | 457 | signalVector *burst; |
Thomas Tsou | ef25dba | 2013-11-14 15:31:24 -0500 | [diff] [blame] | 458 | SoftVector *bits = NULL; |
Thomas Tsou | a0179e3 | 2013-11-14 15:52:04 -0500 | [diff] [blame] | 459 | TransceiverState *state = &mStates[chan]; |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 460 | |
Thomas Tsou | 30421a7 | 2013-11-13 23:14:48 -0500 | [diff] [blame] | 461 | /* Blocking FIFO read */ |
| 462 | radioVector *radio_burst = mReceiveFIFO[chan]->read(); |
| 463 | if (!radio_burst) |
| 464 | return NULL; |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 465 | |
Thomas Tsou | 30421a7 | 2013-11-13 23:14:48 -0500 | [diff] [blame] | 466 | /* Set time and determine correlation type */ |
| 467 | GSM::Time time = radio_burst->getTime(); |
| 468 | CorrType type = expectedCorrType(time, chan); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 469 | |
Thomas Tsou | 30421a7 | 2013-11-13 23:14:48 -0500 | [diff] [blame] | 470 | if ((type == OFF) || (type == IDLE)) { |
| 471 | delete radio_burst; |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 472 | return NULL; |
| 473 | } |
kurtis.heimerl | 3ed6fb7 | 2011-11-26 03:17:52 +0000 | [diff] [blame] | 474 | |
Thomas Tsou | e90a42b | 2013-11-13 23:38:09 -0500 | [diff] [blame] | 475 | /* Select the diversity channel with highest energy */ |
| 476 | for (size_t i = 0; i < radio_burst->chans(); i++) { |
| 477 | energyDetect(*radio_burst->getVector(i), 20 * mSPSRx, 0.0, &pow); |
| 478 | if (pow > max) { |
| 479 | max = pow; |
| 480 | max_i = i; |
| 481 | } |
| 482 | avg += pow; |
| 483 | } |
| 484 | |
| 485 | if (max_i < 0) { |
| 486 | LOG(ALERT) << "Received empty burst"; |
| 487 | delete radio_burst; |
| 488 | return NULL; |
| 489 | } |
| 490 | |
Thomas Tsou | 30421a7 | 2013-11-13 23:14:48 -0500 | [diff] [blame] | 491 | /* Average noise on diversity paths and update global levels */ |
Thomas Tsou | e90a42b | 2013-11-13 23:38:09 -0500 | [diff] [blame] | 492 | burst = radio_burst->getVector(max_i); |
Thomas Tsou | ef25dba | 2013-11-14 15:31:24 -0500 | [diff] [blame] | 493 | avg = sqrt(avg / radio_burst->chans()); |
Thomas Tsou | a0179e3 | 2013-11-14 15:52:04 -0500 | [diff] [blame] | 494 | state->mNoiseLev = state->mNoises.avg(); |
Thomas Tsou | fa3a787 | 2013-10-17 21:23:34 -0400 | [diff] [blame] | 495 | |
Thomas Tsou | 30421a7 | 2013-11-13 23:14:48 -0500 | [diff] [blame] | 496 | /* Detect normal or RACH bursts */ |
| 497 | if (type == TSC) |
Thomas Tsou | a0179e3 | 2013-11-14 15:52:04 -0500 | [diff] [blame] | 498 | success = detectTSC(state, *burst, amp, toa, time); |
Thomas Tsou | 30421a7 | 2013-11-13 23:14:48 -0500 | [diff] [blame] | 499 | else |
Thomas Tsou | a0179e3 | 2013-11-14 15:52:04 -0500 | [diff] [blame] | 500 | success = detectRACH(state, *burst, amp, toa); |
Thomas Tsou | f078273 | 2013-10-29 15:55:47 -0400 | [diff] [blame] | 501 | |
Thomas Tsou | 30421a7 | 2013-11-13 23:14:48 -0500 | [diff] [blame] | 502 | if (!success) { |
Thomas Tsou | a0179e3 | 2013-11-14 15:52:04 -0500 | [diff] [blame] | 503 | state->mNoises.insert(avg); |
Thomas Tsou | 30421a7 | 2013-11-13 23:14:48 -0500 | [diff] [blame] | 504 | delete radio_burst; |
| 505 | return NULL; |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 506 | } |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 507 | |
Thomas Tsou | 30421a7 | 2013-11-13 23:14:48 -0500 | [diff] [blame] | 508 | /* Demodulate and set output info */ |
| 509 | if (equalize && (type != TSC)) |
| 510 | equalize = false; |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 511 | |
Thomas Tsou | a0179e3 | 2013-11-14 15:52:04 -0500 | [diff] [blame] | 512 | if (avg - state->mNoiseLev > 0.0) |
| 513 | bits = demodulate(state, *burst, amp, toa, time.TN(), equalize); |
Thomas Tsou | ef25dba | 2013-11-14 15:31:24 -0500 | [diff] [blame] | 514 | |
Thomas Tsou | 30421a7 | 2013-11-13 23:14:48 -0500 | [diff] [blame] | 515 | wTime = time; |
| 516 | RSSI = (int) floor(20.0 * log10(rxFullScale / avg)); |
| 517 | timingOffset = (int) round(toa * 256.0 / mSPSRx); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 518 | |
Thomas Tsou | 30421a7 | 2013-11-13 23:14:48 -0500 | [diff] [blame] | 519 | delete radio_burst; |
| 520 | |
| 521 | return bits; |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 522 | } |
| 523 | |
| 524 | void Transceiver::start() |
| 525 | { |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 526 | TransceiverChannel *chan; |
| 527 | |
| 528 | for (size_t i = 0; i < mControlServiceLoopThreads.size(); i++) { |
| 529 | chan = new TransceiverChannel(this, i); |
| 530 | mControlServiceLoopThreads[i]->start((void * (*)(void*)) |
| 531 | ControlServiceLoopAdapter, (void*) chan); |
| 532 | } |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 533 | } |
| 534 | |
| 535 | void Transceiver::reset() |
| 536 | { |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 537 | for (size_t i = 0; i < mTxPriorityQueues.size(); i++) |
| 538 | mTxPriorityQueues[i].clear(); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 539 | } |
| 540 | |
| 541 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 542 | void Transceiver::driveControl(size_t chan) |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 543 | { |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 544 | int MAX_PACKET_LENGTH = 100; |
| 545 | |
| 546 | // check control socket |
| 547 | char buffer[MAX_PACKET_LENGTH]; |
| 548 | int msgLen = -1; |
| 549 | buffer[0] = '\0'; |
Thomas Tsou | d647ec5 | 2013-10-29 15:17:34 -0400 | [diff] [blame] | 550 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 551 | msgLen = mCtrlSockets[chan]->read(buffer); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 552 | |
| 553 | if (msgLen < 1) { |
| 554 | return; |
| 555 | } |
| 556 | |
| 557 | char cmdcheck[4]; |
| 558 | char command[MAX_PACKET_LENGTH]; |
| 559 | char response[MAX_PACKET_LENGTH]; |
| 560 | |
| 561 | sscanf(buffer,"%3s %s",cmdcheck,command); |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 562 | |
| 563 | if (!chan) |
| 564 | writeClockInterface(); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 565 | |
| 566 | if (strcmp(cmdcheck,"CMD")!=0) { |
| 567 | LOG(WARNING) << "bogus message on control interface"; |
| 568 | return; |
| 569 | } |
| 570 | LOG(INFO) << "command is " << buffer; |
| 571 | |
| 572 | if (strcmp(command,"POWEROFF")==0) { |
| 573 | // turn off transmitter/demod |
| 574 | sprintf(response,"RSP POWEROFF 0"); |
| 575 | } |
| 576 | else if (strcmp(command,"POWERON")==0) { |
| 577 | // turn on transmitter/demod |
| 578 | if (!mTxFreq || !mRxFreq) |
| 579 | sprintf(response,"RSP POWERON 1"); |
| 580 | else { |
| 581 | sprintf(response,"RSP POWERON 0"); |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 582 | if (!chan && !mOn) { |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 583 | // Prepare for thread start |
| 584 | mPower = -20; |
| 585 | mRadioInterface->start(); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 586 | |
| 587 | // Start radio interface threads. |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 588 | mTxLowerLoopThread->start((void * (*)(void*)) |
| 589 | TxLowerLoopAdapter,(void*) this); |
| 590 | mRxLowerLoopThread->start((void * (*)(void*)) |
| 591 | RxLowerLoopAdapter,(void*) this); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 592 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 593 | for (size_t i = 0; i < mChans; i++) { |
| 594 | TransceiverChannel *chan = new TransceiverChannel(this, i); |
| 595 | mRxServiceLoopThreads[i]->start((void * (*)(void*)) |
| 596 | RxUpperLoopAdapter, (void*) chan); |
| 597 | |
| 598 | chan = new TransceiverChannel(this, i); |
| 599 | mTxPriorityQueueServiceLoopThreads[i]->start((void * (*)(void*)) |
| 600 | TxUpperLoopAdapter, (void*) chan); |
| 601 | } |
| 602 | |
| 603 | writeClockInterface(); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 604 | mOn = true; |
| 605 | } |
| 606 | } |
| 607 | } |
| 608 | else if (strcmp(command,"SETMAXDLY")==0) { |
| 609 | //set expected maximum time-of-arrival |
| 610 | int maxDelay; |
| 611 | sscanf(buffer,"%3s %s %d",cmdcheck,command,&maxDelay); |
| 612 | mMaxExpectedDelay = maxDelay; // 1 GSM symbol is approx. 1 km |
| 613 | sprintf(response,"RSP SETMAXDLY 0 %d",maxDelay); |
| 614 | } |
| 615 | else if (strcmp(command,"SETRXGAIN")==0) { |
| 616 | //set expected maximum time-of-arrival |
| 617 | int newGain; |
| 618 | sscanf(buffer,"%3s %s %d",cmdcheck,command,&newGain); |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 619 | newGain = mRadioInterface->setRxGain(newGain, chan); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 620 | sprintf(response,"RSP SETRXGAIN 0 %d",newGain); |
| 621 | } |
| 622 | else if (strcmp(command,"NOISELEV")==0) { |
| 623 | if (mOn) { |
Thomas Tsou | a0179e3 | 2013-11-14 15:52:04 -0500 | [diff] [blame] | 624 | float lev = mStates[chan].mNoiseLev; |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 625 | sprintf(response,"RSP NOISELEV 0 %d", |
Thomas Tsou | a0179e3 | 2013-11-14 15:52:04 -0500 | [diff] [blame] | 626 | (int) round(20.0 * log10(rxFullScale / lev))); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 627 | } |
| 628 | else { |
| 629 | sprintf(response,"RSP NOISELEV 1 0"); |
| 630 | } |
Thomas Tsou | cb269a3 | 2013-11-15 14:15:47 -0500 | [diff] [blame] | 631 | } |
| 632 | else if (!strcmp(command, "SETPOWER")) { |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 633 | // set output power in dB |
| 634 | int dbPwr; |
Thomas Tsou | cb269a3 | 2013-11-15 14:15:47 -0500 | [diff] [blame] | 635 | sscanf(buffer, "%3s %s %d", cmdcheck, command, &dbPwr); |
| 636 | if (!mOn) |
| 637 | sprintf(response, "RSP SETPOWER 1 %d", dbPwr); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 638 | else { |
| 639 | mPower = dbPwr; |
Thomas Tsou | cb269a3 | 2013-11-15 14:15:47 -0500 | [diff] [blame] | 640 | mRadioInterface->setPowerAttenuation(mPower, chan); |
| 641 | sprintf(response, "RSP SETPOWER 0 %d", dbPwr); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 642 | } |
| 643 | } |
Thomas Tsou | cb269a3 | 2013-11-15 14:15:47 -0500 | [diff] [blame] | 644 | else if (!strcmp(command,"ADJPOWER")) { |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 645 | // adjust power in dB steps |
| 646 | int dbStep; |
Thomas Tsou | cb269a3 | 2013-11-15 14:15:47 -0500 | [diff] [blame] | 647 | sscanf(buffer, "%3s %s %d", cmdcheck, command, &dbStep); |
| 648 | if (!mOn) |
| 649 | sprintf(response, "RSP ADJPOWER 1 %d", mPower); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 650 | else { |
| 651 | mPower += dbStep; |
Thomas Tsou | cb269a3 | 2013-11-15 14:15:47 -0500 | [diff] [blame] | 652 | mRadioInterface->setPowerAttenuation(mPower, chan); |
| 653 | sprintf(response, "RSP ADJPOWER 0 %d", mPower); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 654 | } |
| 655 | } |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 656 | else if (strcmp(command,"RXTUNE")==0) { |
| 657 | // tune receiver |
| 658 | int freqKhz; |
| 659 | sscanf(buffer,"%3s %s %d",cmdcheck,command,&freqKhz); |
Thomas Tsou | 477b77c | 2013-11-15 16:13:59 -0500 | [diff] [blame] | 660 | mRxFreq = freqKhz * 1e3; |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 661 | if (!mRadioInterface->tuneRx(mRxFreq, chan)) { |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 662 | LOG(ALERT) << "RX failed to tune"; |
| 663 | sprintf(response,"RSP RXTUNE 1 %d",freqKhz); |
| 664 | } |
| 665 | else |
| 666 | sprintf(response,"RSP RXTUNE 0 %d",freqKhz); |
| 667 | } |
| 668 | else if (strcmp(command,"TXTUNE")==0) { |
| 669 | // tune txmtr |
| 670 | int freqKhz; |
| 671 | sscanf(buffer,"%3s %s %d",cmdcheck,command,&freqKhz); |
Thomas Tsou | 477b77c | 2013-11-15 16:13:59 -0500 | [diff] [blame] | 672 | mTxFreq = freqKhz * 1e3; |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 673 | if (!mRadioInterface->tuneTx(mTxFreq, chan)) { |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 674 | LOG(ALERT) << "TX failed to tune"; |
| 675 | sprintf(response,"RSP TXTUNE 1 %d",freqKhz); |
| 676 | } |
| 677 | else |
| 678 | sprintf(response,"RSP TXTUNE 0 %d",freqKhz); |
| 679 | } |
Thomas Tsou | d3fccea | 2013-11-15 14:22:53 -0500 | [diff] [blame] | 680 | else if (!strcmp(command,"SETTSC")) { |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 681 | // set TSC |
Thomas Tsou | 3f32ab5 | 2013-11-15 16:32:54 -0500 | [diff] [blame] | 682 | unsigned TSC; |
Thomas Tsou | d3fccea | 2013-11-15 14:22:53 -0500 | [diff] [blame] | 683 | sscanf(buffer, "%3s %s %d", cmdcheck, command, &TSC); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 684 | if (mOn) |
Thomas Tsou | d3fccea | 2013-11-15 14:22:53 -0500 | [diff] [blame] | 685 | sprintf(response, "RSP SETTSC 1 %d", TSC); |
| 686 | else if (chan && (TSC != mTSC)) |
| 687 | sprintf(response, "RSP SETTSC 1 %d", TSC); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 688 | else { |
| 689 | mTSC = TSC; |
Thomas Tsou | c1f7c42 | 2013-10-11 13:49:55 -0400 | [diff] [blame] | 690 | generateMidamble(mSPSRx, TSC); |
Thomas Tsou | 83e0689 | 2013-08-20 16:10:01 -0400 | [diff] [blame] | 691 | sprintf(response,"RSP SETTSC 0 %d", TSC); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 692 | } |
| 693 | } |
| 694 | else if (strcmp(command,"SETSLOT")==0) { |
| 695 | // set TSC |
| 696 | int corrCode; |
| 697 | int timeslot; |
| 698 | sscanf(buffer,"%3s %s %d %d",cmdcheck,command,×lot,&corrCode); |
| 699 | if ((timeslot < 0) || (timeslot > 7)) { |
| 700 | LOG(WARNING) << "bogus message on control interface"; |
| 701 | sprintf(response,"RSP SETSLOT 1 %d %d",timeslot,corrCode); |
| 702 | return; |
| 703 | } |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 704 | mStates[chan].chanType[timeslot] = (ChannelCombination) corrCode; |
| 705 | setModulus(timeslot, chan); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 706 | sprintf(response,"RSP SETSLOT 0 %d %d",timeslot,corrCode); |
| 707 | |
| 708 | } |
| 709 | else { |
| 710 | LOG(WARNING) << "bogus command " << command << " on control interface."; |
| 711 | } |
| 712 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 713 | mCtrlSockets[chan]->write(response, strlen(response) + 1); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 714 | } |
| 715 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 716 | bool Transceiver::driveTxPriorityQueue(size_t chan) |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 717 | { |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 718 | char buffer[gSlotLen+50]; |
| 719 | |
| 720 | // check data socket |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 721 | size_t msgLen = mDataSockets[chan]->read(buffer); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 722 | |
| 723 | if (msgLen!=gSlotLen+1+4+1) { |
| 724 | LOG(ERR) << "badly formatted packet on GSM->TRX interface"; |
| 725 | return false; |
| 726 | } |
| 727 | |
| 728 | int timeSlot = (int) buffer[0]; |
| 729 | uint64_t frameNum = 0; |
| 730 | for (int i = 0; i < 4; i++) |
| 731 | frameNum = (frameNum << 8) | (0x0ff & buffer[i+1]); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 732 | |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 733 | // periodically update GSM core clock |
| 734 | LOG(DEBUG) << "mTransmitDeadlineClock " << mTransmitDeadlineClock |
| 735 | << " mLastClockUpdateTime " << mLastClockUpdateTime; |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 736 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 737 | if (!chan) { |
| 738 | if (mTransmitDeadlineClock > mLastClockUpdateTime + GSM::Time(216,0)) |
| 739 | writeClockInterface(); |
| 740 | } |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 741 | |
| 742 | LOG(DEBUG) << "rcvd. burst at: " << GSM::Time(frameNum,timeSlot); |
| 743 | |
| 744 | int RSSI = (int) buffer[5]; |
| 745 | static BitVector newBurst(gSlotLen); |
| 746 | BitVector::iterator itr = newBurst.begin(); |
| 747 | char *bufferItr = buffer+6; |
| 748 | while (itr < newBurst.end()) |
| 749 | *itr++ = *bufferItr++; |
| 750 | |
| 751 | GSM::Time currTime = GSM::Time(frameNum,timeSlot); |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 752 | |
| 753 | addRadioVector(chan, newBurst, RSSI, currTime); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 754 | |
| 755 | return true; |
| 756 | |
| 757 | |
| 758 | } |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 759 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 760 | void Transceiver::driveReceiveRadio() |
| 761 | { |
| 762 | if (!mRadioInterface->driveReceiveRadio()) |
| 763 | usleep(100000); |
| 764 | } |
| 765 | |
| 766 | void Transceiver::driveReceiveFIFO(size_t chan) |
| 767 | { |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 768 | SoftVector *rxBurst = NULL; |
| 769 | int RSSI; |
| 770 | int TOA; // in 1/256 of a symbol |
| 771 | GSM::Time burstTime; |
| 772 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 773 | rxBurst = pullRadioVector(burstTime, RSSI, TOA, chan); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 774 | |
| 775 | if (rxBurst) { |
| 776 | |
| 777 | LOG(DEBUG) << "burst parameters: " |
| 778 | << " time: " << burstTime |
| 779 | << " RSSI: " << RSSI |
| 780 | << " TOA: " << TOA |
| 781 | << " bits: " << *rxBurst; |
| 782 | |
| 783 | char burstString[gSlotLen+10]; |
| 784 | burstString[0] = burstTime.TN(); |
| 785 | for (int i = 0; i < 4; i++) |
| 786 | burstString[1+i] = (burstTime.FN() >> ((3-i)*8)) & 0x0ff; |
| 787 | burstString[5] = RSSI; |
| 788 | burstString[6] = (TOA >> 8) & 0x0ff; |
| 789 | burstString[7] = TOA & 0x0ff; |
| 790 | SoftVector::iterator burstItr = rxBurst->begin(); |
| 791 | |
| 792 | for (unsigned int i = 0; i < gSlotLen; i++) { |
| 793 | burstString[8+i] =(char) round((*burstItr++)*255.0); |
| 794 | } |
| 795 | burstString[gSlotLen+9] = '\0'; |
| 796 | delete rxBurst; |
| 797 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 798 | mDataSockets[chan]->write(burstString,gSlotLen+10); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 799 | } |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 800 | } |
| 801 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 802 | void Transceiver::driveTxFIFO() |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 803 | { |
| 804 | |
| 805 | /** |
| 806 | Features a carefully controlled latency mechanism, to |
| 807 | assure that transmit packets arrive at the radio/USRP |
| 808 | before they need to be transmitted. |
| 809 | |
| 810 | Deadline clock indicates the burst that needs to be |
| 811 | pushed into the FIFO right NOW. If transmit queue does |
| 812 | not have a burst, stick in filler data. |
| 813 | */ |
| 814 | |
| 815 | |
| 816 | RadioClock *radioClock = (mRadioInterface->getClock()); |
| 817 | |
| 818 | if (mOn) { |
| 819 | //radioClock->wait(); // wait until clock updates |
| 820 | LOG(DEBUG) << "radio clock " << radioClock->get(); |
| 821 | while (radioClock->get() + mTransmitLatency > mTransmitDeadlineClock) { |
| 822 | // if underrun, then we're not providing bursts to radio/USRP fast |
| 823 | // enough. Need to increase latency by one GSM frame. |
Thomas Tsou | 02d88d1 | 2013-04-05 15:36:30 -0400 | [diff] [blame] | 824 | if (mRadioInterface->getWindowType() == RadioDevice::TX_WINDOW_USRP1) { |
kurtis.heimerl | e380af3 | 2011-11-26 03:18:55 +0000 | [diff] [blame] | 825 | if (mRadioInterface->isUnderrun()) { |
ttsou | 2173abf | 2012-08-08 00:51:31 +0000 | [diff] [blame] | 826 | // only update latency at the defined frame interval |
| 827 | if (radioClock->get() > mLatencyUpdateTime + GSM::Time(USB_LATENCY_INTRVL)) { |
kurtis.heimerl | e380af3 | 2011-11-26 03:18:55 +0000 | [diff] [blame] | 828 | mTransmitLatency = mTransmitLatency + GSM::Time(1,0); |
| 829 | LOG(INFO) << "new latency: " << mTransmitLatency; |
| 830 | mLatencyUpdateTime = radioClock->get(); |
| 831 | } |
| 832 | } |
| 833 | else { |
| 834 | // if underrun hasn't occurred in the last sec (216 frames) drop |
| 835 | // transmit latency by a timeslot |
ttsou | 2173abf | 2012-08-08 00:51:31 +0000 | [diff] [blame] | 836 | if (mTransmitLatency > GSM::Time(USB_LATENCY_MIN)) { |
kurtis.heimerl | e380af3 | 2011-11-26 03:18:55 +0000 | [diff] [blame] | 837 | if (radioClock->get() > mLatencyUpdateTime + GSM::Time(216,0)) { |
| 838 | mTransmitLatency.decTN(); |
| 839 | LOG(INFO) << "reduced latency: " << mTransmitLatency; |
| 840 | mLatencyUpdateTime = radioClock->get(); |
| 841 | } |
| 842 | } |
| 843 | } |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 844 | } |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 845 | // time to push burst to transmit FIFO |
| 846 | pushRadioVector(mTransmitDeadlineClock); |
| 847 | mTransmitDeadlineClock.incTN(); |
| 848 | } |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 849 | } |
Thomas Tsou | 92c16df | 2013-09-28 18:04:19 -0400 | [diff] [blame] | 850 | |
| 851 | radioClock->wait(); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 852 | } |
| 853 | |
| 854 | |
| 855 | |
| 856 | void Transceiver::writeClockInterface() |
| 857 | { |
| 858 | char command[50]; |
| 859 | // FIXME -- This should be adaptive. |
| 860 | sprintf(command,"IND CLOCK %llu",(unsigned long long) (mTransmitDeadlineClock.FN()+2)); |
| 861 | |
| 862 | LOG(INFO) << "ClockInterface: sending " << command; |
| 863 | |
Thomas Tsou | d647ec5 | 2013-10-29 15:17:34 -0400 | [diff] [blame] | 864 | mClockSocket->write(command, strlen(command) + 1); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 865 | |
| 866 | mLastClockUpdateTime = mTransmitDeadlineClock; |
| 867 | |
Thomas Tsou | 92c16df | 2013-09-28 18:04:19 -0400 | [diff] [blame] | 868 | } |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 869 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 870 | void *RxUpperLoopAdapter(TransceiverChannel *chan) |
| 871 | { |
| 872 | Transceiver *trx = chan->trx; |
| 873 | size_t num = chan->num; |
| 874 | |
| 875 | delete chan; |
| 876 | |
Thomas Tsou | 7553aa9 | 2013-11-08 12:50:03 -0500 | [diff] [blame] | 877 | trx->setPriority(0.42); |
| 878 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 879 | while (1) { |
| 880 | trx->driveReceiveFIFO(num); |
| 881 | pthread_testcancel(); |
| 882 | } |
| 883 | return NULL; |
| 884 | } |
| 885 | |
| 886 | void *RxLowerLoopAdapter(Transceiver *transceiver) |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 887 | { |
Thomas Tsou | 7553aa9 | 2013-11-08 12:50:03 -0500 | [diff] [blame] | 888 | transceiver->setPriority(0.45); |
kurtis.heimerl | 6b495a5 | 2011-11-26 03:17:21 +0000 | [diff] [blame] | 889 | |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 890 | while (1) { |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 891 | transceiver->driveReceiveRadio(); |
Thomas Tsou | 92c16df | 2013-09-28 18:04:19 -0400 | [diff] [blame] | 892 | pthread_testcancel(); |
| 893 | } |
| 894 | return NULL; |
| 895 | } |
| 896 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 897 | void *TxLowerLoopAdapter(Transceiver *transceiver) |
Thomas Tsou | 92c16df | 2013-09-28 18:04:19 -0400 | [diff] [blame] | 898 | { |
Thomas Tsou | 7553aa9 | 2013-11-08 12:50:03 -0500 | [diff] [blame] | 899 | transceiver->setPriority(0.44); |
| 900 | |
Thomas Tsou | 92c16df | 2013-09-28 18:04:19 -0400 | [diff] [blame] | 901 | while (1) { |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 902 | transceiver->driveTxFIFO(); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 903 | pthread_testcancel(); |
| 904 | } |
| 905 | return NULL; |
| 906 | } |
| 907 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 908 | void *ControlServiceLoopAdapter(TransceiverChannel *chan) |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 909 | { |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 910 | Transceiver *trx = chan->trx; |
| 911 | size_t num = chan->num; |
| 912 | |
| 913 | delete chan; |
| 914 | |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 915 | while (1) { |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 916 | trx->driveControl(num); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 917 | pthread_testcancel(); |
| 918 | } |
| 919 | return NULL; |
| 920 | } |
| 921 | |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 922 | void *TxUpperLoopAdapter(TransceiverChannel *chan) |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 923 | { |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 924 | Transceiver *trx = chan->trx; |
| 925 | size_t num = chan->num; |
| 926 | |
| 927 | delete chan; |
| 928 | |
Thomas Tsou | a4cf48c | 2013-11-09 21:44:26 -0500 | [diff] [blame] | 929 | trx->setPriority(0.40); |
| 930 | |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 931 | while (1) { |
| 932 | bool stale = false; |
| 933 | // Flush the UDP packets until a successful transfer. |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 934 | while (!trx->driveTxPriorityQueue(num)) { |
| 935 | stale = true; |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 936 | } |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 937 | if (!num && stale) { |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 938 | // If a packet was stale, remind the GSM stack of the clock. |
Thomas Tsou | 204a9f1 | 2013-10-29 18:34:16 -0400 | [diff] [blame] | 939 | trx->writeClockInterface(); |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 940 | } |
| 941 | pthread_testcancel(); |
| 942 | } |
| 943 | return NULL; |
| 944 | } |