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Transceiver: Add support for OsmoBTS style handover.

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This commit is contained in:
Alexander Chemeris
2015-06-20 01:38:47 +03:00
parent 139c84564c
commit 3ac1cbf40e
2 changed files with 47 additions and 4 deletions
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50
Transceiver52M/Transceiver.cpp
View File

@@ -156,6 +156,11 @@ Transceiver::Transceiver(int wBasePort,
{
txFullScale = mRadioInterface->fullScaleInputValue();
rxFullScale = mRadioInterface->fullScaleOutputValue();
for (int i = 0; i < 8; i++) {
for (int j = 0; j < 8; j++)
mHandover[i][j] = false;
}
}
Transceiver::~Transceiver()
@@ -463,9 +468,15 @@ void Transceiver::setModulus(size_t timeslot, size_t chan)
Transceiver::CorrType Transceiver::expectedCorrType(GSM::Time currTime,
size_t chan)
{
static int tchh_subslot[26] = { 0,1,0,1,0,1,0,1,0,1,0,1,0,0,1,0,1,0,1,0,1,0,1,0,1,1 };
static int sdcch4_subslot[102] = { 3,3,3,3,0,0,2,2,2,2,3,3,3,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,0,0,2,2,2,2,
3,3,3,3,0,0,0,0,0,0,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,0,0,2,2,2,2 };
static int sdcch8_subslot[102] = { 5,5,5,5,6,6,6,6,7,7,7,7,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,6,6,6,6,7,7,7,7,0,0,0,0,
1,1,1,1,2,2,2,2,3,3,3,3,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,6,6,6,6,7,7,7,7,4,4,4,4 };
TransceiverState *state = &mStates[chan];
unsigned burstTN = currTime.TN();
unsigned burstFN = currTime.FN();
int subch;
switch (state->chanType[burstTN]) {
case NONE:
@@ -475,16 +486,25 @@ Transceiver::CorrType Transceiver::expectedCorrType(GSM::Time currTime,
return IDLE;
break;
case I:
// TODO: Are we expecting RACH on an IDLE frame?
/* if (burstFN % 26 == 25)
return IDLE;*/
if (mHandover[burstTN][0])
return RACH;
return TSC;
/*if (burstFN % 26 == 25)
return IDLE;
else
return TSC;*/
break;
case II:
subch = tchh_subslot[burstFN % 26];
if (subch == 1)
return IDLE;
if (mHandover[burstTN][0])
return RACH;
return TSC;
break;
case III:
subch = tchh_subslot[burstFN % 26];
if (mHandover[burstTN][subch])
return RACH;
return TSC;
break;
case IV:
@@ -499,6 +519,8 @@ Transceiver::CorrType Transceiver::expectedCorrType(GSM::Time currTime,
return RACH;
else if ((mod51 == 45) || (mod51 == 46))
return RACH;
else if (mHandover[burstTN][sdcch4_subslot[burstFN % 102]])
return RACH;
else
return TSC;
break;
@@ -506,6 +528,8 @@ Transceiver::CorrType Transceiver::expectedCorrType(GSM::Time currTime,
case VII:
if ((burstFN % 51 <= 14) && (burstFN % 51 >= 12))
return IDLE;
else if (mHandover[burstTN][sdcch8_subslot[burstFN % 102]])
return RACH;
else
return TSC;
break;
@@ -782,6 +806,24 @@ void Transceiver::driveControl(size_t chan)
sprintf(response,"RSP POWERON 1");
else
sprintf(response,"RSP POWERON 0");
for (int i = 0; i < 8; i++) {
for (int j = 0; j < 8; j++)
mHandover[i][j] = false;
}
}
else if (strcmp(command,"HANDOVER")==0){
int ts=0,ss=0;
sscanf(buffer,"%3s %s %d %d",cmdcheck,command,&ts,&ss);
mHandover[ts][ss] = true;
LOG(WARNING) << "HANDOVER RACH at timeslot " << ts << " subslot " << ss;
sprintf(response,"RSP HANDOVER 0 %d %d",ts,ss);
}
else if (strcmp(command,"NOHANDOVER")==0){
int ts=0,ss=0;
sscanf(buffer,"%3s %s %d %d",cmdcheck,command,&ts,&ss);
mHandover[ts][ss] = false;
LOG(WARNING) << "NOHANDOVER at timeslot " << ts << " subslot " << ss;
sprintf(response,"RSP NOHANDOVER 0 %d %d",ts,ss);
}
else if (strcmp(command,"SETMAXDLY")==0) {
//set expected maximum time-of-arrival

1
Transceiver52M/Transceiver.h
View File

@@ -228,6 +228,7 @@ private:
size_t mChans;
bool mOn; ///< flag to indicate that transceiver is powered on
bool mHandover[8][8]; ///< expect handover to the timeslot/subslot
double mTxFreq; ///< the transmit frequency
double mRxFreq; ///< the receive frequency
unsigned mTSC; ///< the midamble sequence code