TCHFACCHLogicalChannel *GSMConfig::getTCH()
{
mLock.lock();
TCHFACCHLogicalChannel *chan = getChan<TCHFACCHLogicalChannel>(mTCHPool);
if (chan) chan->open();
mLock.unlock();
return chan;
}
void GSMConfig::createCombinationI(TransceiverManager& TRX, unsigned CN, unsigned TN)
{
LOG_ASSERT((CN!=0)||(TN!=0));
LOG(NOTICE) << "Configuring combination I on C" << CN << "T" << TN;
ARFCNManager *radio = TRX.ARFCN(CN);
radio->setSlot(TN,1); // (pat) 1 => Transciever.h enum ChannelCombination = I
TCHFACCHLogicalChannel* chan = new TCHFACCHLogicalChannel(CN,TN,gTCHF_T[TN]);
chan->downstream(radio);
Thread* thread = new Thread;
thread->start((void*(*)(void*))Control::DCCHDispatcher,chan);
chan->open();
gBTS.addTCH(chan);
}
// (pat) By a very tortuous path, chan->open() calls L1Encoder::open() and L1Decoder::open(),
// which sets mActive in both and resets the timers.
TCHFACCHLogicalChannel *GSMConfig::getTCH(
bool forGPRS, // If true, allocate the channel to gprs, else to RR use.
bool onlyCN0) // If true, allocate only channels on the lowest ARFCN.
{
LOG(DEBUG);
ScopedLock lock(mLock);
//if (GPRS::GPRSDebug) {
// const unsigned sz = mTCHPool.size();
// char buf[300]; int n = 0;
// for (unsigned i=0; i<sz; i++) {
// TCHFACCHLogicalChannel *chan = mTCHPool[i];
// n += sprintf(&buf[n],"ch=%d:%d,g=%d,r=%d ",chan->CN(),chan->TN(),
// chan->inUseByGPRS(),chan->recyclable());
// }
// LOG(WARNING)<<"getTCH list:"<<buf;
//}
TCHFACCHLogicalChannel *chan = getChan<TCHFACCHLogicalChannel>(mTCHPool,forGPRS);
// (pat) We have to open it or set gprs mode before returning to avoid a race.
if (chan) {
// The channels are searched in order from low to high, so if the first channel
// found is not on CN0, we have failed.
//LOG(DEBUG)<<"getTCH returns"<<LOGVAR2("chan->CN",chan->CN());
if (onlyCN0 && chan->CN()) { return NULL; }
if (forGPRS) {
// (pat) Reserves channel for GPRS, but does not start delivering bursts yet.
chan->debugGetL1()->setGPRS(true,NULL);
return chan;
}
chan->open(); // (pat) LogicalChannel::open(); Opens mSACCH also.
gReports.incr("OpenBTS.GSM.RR.ChannelAssignment");
} else {
//LOG(DEBUG)<<"getTCH returns NULL";
}
LOG(DEBUG);
return chan;
}
int main(int argc, char *argv[])
{
srandom(time(NULL));
COUT("\n\n" << gOpenBTSWelcome << "\n");
COUT("\nStarting the system...");
gSetLogLevel(gConfig.getStr("LogLevel"));
if (gConfig.defines("LogFileName")) {
gSetLogFile(gConfig.getStr("LogFileName"));
}
// Start the transceiver binary, if the path is defined.
// If the path is not defined, the transceiver must be started by some other process.
const char *TRXPath = NULL;
if (gConfig.defines("TRX.Path")) TRXPath=gConfig.getStr("TRX.Path");
pid_t transceiverPid = 0;
if (TRXPath) {
const char *TRXLogLevel = gConfig.getStr("TRX.LogLevel");
const char *TRXLogFileName = NULL;
if (gConfig.defines("TRX.LogFileName")) TRXLogFileName=gConfig.getStr("TRX.LogFileName");
transceiverPid = vfork();
assert(transceiverPid>=0);
if (transceiverPid==0) {
execl(TRXPath,"transceiver",TRXLogLevel,TRXLogFileName,NULL);
LOG(ERROR) << "cannot start transceiver";
_exit(0);
}
}
// Start the SIP interface.
gSIPInterface.start();
// Start the transceiver interface.
gTRX.start();
// Set up the interface to the radio.
// Get a handle to the C0 transceiver interface.
ARFCNManager* radio = gTRX.ARFCN(0);
// Tuning.
// Make sure its off for tuning.
radio->powerOff();
// Set TSC same as BSC everywhere.
radio->setTSC(gBTS.BCC());
// Tune.
radio->tune(gConfig.getNum("GSM.ARFCN"));
// C-V on C0T0
radio->setSlot(0,5);
// Turn on and power up.
radio->powerOn();
radio->setPower(gConfig.getNum("GSM.PowerAttenDB"));
// set up a combination V beacon set
// SCH
SCHL1FEC SCH;
SCH.downstream(radio);
SCH.open();
// FCCH
FCCHL1FEC FCCH;
FCCH.downstream(radio);
FCCH.open();
// BCCH
BCCHL1FEC BCCH;
BCCH.downstream(radio);
BCCH.open();
// RACH
RACHL1FEC RACH(gRACHC5Mapping);
RACH.downstream(radio);
RACH.open();
// CCCHs
CCCHLogicalChannel CCCH0(gCCCH_0Mapping);
CCCH0.downstream(radio);
CCCH0.open();
CCCHLogicalChannel CCCH1(gCCCH_1Mapping);
CCCH1.downstream(radio);
CCCH1.open();
CCCHLogicalChannel CCCH2(gCCCH_2Mapping);
CCCH2.downstream(radio);
CCCH2.open();
// use CCCHs as AGCHs
gBTS.addAGCH(&CCCH0);
gBTS.addAGCH(&CCCH1);
gBTS.addAGCH(&CCCH2);
// C-V C0T0 SDCCHs
SDCCHLogicalChannel SDCCH[4] = {
SDCCHLogicalChannel(0,gSDCCH_4_0),
SDCCHLogicalChannel(0,gSDCCH_4_1),
SDCCHLogicalChannel(0,gSDCCH_4_2),
SDCCHLogicalChannel(0,gSDCCH_4_3)
};
Thread SDCCHControlThread[4];
for (int i=0; i<4; i++) {
SDCCH[i].downstream(radio);
SDCCHControlThread[i].start((void*(*)(void*))Control::DCCHDispatcher,&SDCCH[i]);
SDCCH[i].open();
gBTS.addSDCCH(&SDCCH[i]);
}
// Count configured slots.
unsigned sCount = 1;
// Create C-VII slots on C0Tn
for (unsigned i=0; i<gConfig.getNum("GSM.NumC7s"); i++) {
radio->setSlot(sCount,7);
for (unsigned sub=0; sub<8; sub++) {
SDCCHLogicalChannel* chan = new SDCCHLogicalChannel(sCount,gSDCCH8[sub]);
chan->downstream(radio);
Thread* thread = new Thread;
thread->start((void*(*)(void*))Control::DCCHDispatcher,chan);
chan->open();
gBTS.addSDCCH(chan);
}
sCount++;
}
// Create C-I slots on C0Tn
for (unsigned i=0; i<gConfig.getNum("GSM.NumC1s"); i++) {
radio->setSlot(sCount,1);
TCHFACCHLogicalChannel* chan = new TCHFACCHLogicalChannel(sCount,gTCHF_T[sCount]);
chan->downstream(radio);
Thread* thread = new Thread;
thread->start((void*(*)(void*))Control::DCCHDispatcher,chan);
chan->open();
gBTS.addTCH(chan);
sCount++;
}
assert(sCount<=8);
/*
Note: The number of different paging subchannels on
the CCCH is:
MAX(1,(3 - BS-AG-BLKS-RES)) * BS-PA-MFRMS
if CCCH-CONF = "001"
(9 - BS-AG-BLKS-RES) * BS-PA-MFRMS
for other values of CCCH-CONF
*/
// Set up the pager.
// Set up paging channels.
gBTS.addPCH(&CCCH2);
// Start the paging generator
// Don't start the pager until some PCHs exist!!
gBTS.pager().start();
LOG(INFO) << "system ready";
COUT("\n\nWelcome to OpenBTS. Type \"help\" to see available commands.");
// FIXME: We want to catch control-d (emacs keybinding for exit())
while (1) {
char inbuf[1024];
cout << "\nOpenBTS> ";
cin.getline(inbuf,1024,'\n');
if (strcmp(inbuf,"exit")==0) break;
gParser.process(inbuf,cout,cin);
}
if (transceiverPid) kill(transceiverPid,SIGKILL);
}