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fix for pointa and ssboffset

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This commit is contained in:
francescomani
2022-07-07 08:57:37 +02:00
committed by Robert Schmidt
parent 5091682551
commit 79586c03f4
8 changed files with 44 additions and 84 deletions
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openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_bch.c
+13 -55
View File
@@ -54,52 +54,6 @@
extern RAN_CONTEXT_t RC;
uint16_t get_ssboffset_pointa(NR_ServingCellConfigCommon_t *scc,const long band) {
int ratio;
switch (*scc->ssbSubcarrierSpacing) {
case NR_SubcarrierSpacing_kHz15:
AssertFatal(band <= 95,
"Band %ld is not possible for SSB with 15 kHz SCS\n",
band);
// no band available above 3GHz using 15kHz
ratio = 3; // NRARFCN step is 5 kHz
break;
case NR_SubcarrierSpacing_kHz30:
AssertFatal(band <= 96,
"Band %ld is not possible for SSB with 30 kHz SCS\n",
band);
if (band == 46 || band == 48 || band == 77 ||
band == 78 || band == 79 || band == 96) // above 3GHz
ratio = 2; // NRARFCN step is 15 kHz
else
ratio = 6; // NRARFCN step is 5 kHz
break;
case NR_SubcarrierSpacing_kHz120:
AssertFatal(band >= 257,
"Band %ld is not possible for SSB with 120 kHz SCS\n",
band);
ratio = 2; // NRARFCN step is 15 kHz
break;
case NR_SubcarrierSpacing_kHz240:
AssertFatal(band >= 257,
"Band %ld is not possible for SSB with 240 kHz SCS\n",
band);
ratio = 4; // NRARFCN step is 15 kHz
break;
default:
AssertFatal(1 == 0, "SCS %ld not allowed for SSB \n",
*scc->ssbSubcarrierSpacing);
}
const uint32_t ssb_offset0 = *scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencySSB - scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencyPointA;
return (ssb_offset0/(ratio*12) - 10); // absoluteFrequencySSB is the center of SSB
}
void schedule_ssb(frame_t frame, sub_frame_t slot,
NR_ServingCellConfigCommon_t *scc,
nfapi_nr_dl_tti_request_body_t *dl_req,
@@ -190,7 +144,7 @@ void schedule_nr_mib(module_id_t module_idP, frame_t frameP, sub_frame_t slotP)
NR_SubcarrierSpacing_t scs = *scc->ssbSubcarrierSpacing;
const long band = *scc->downlinkConfigCommon->frequencyInfoDL->frequencyBandList.list.array[0];
uint16_t offset_pointa = get_ssboffset_pointa(scc,band);
const uint16_t offset_pointa = gNB->ssb_OffsetPointA;
uint8_t ssbSubcarrierOffset = gNB->ssb_SubcarrierOffset;
const BIT_STRING_t *shortBitmap = &scc->ssb_PositionsInBurst->choice.shortBitmap;
@@ -207,8 +161,9 @@ void schedule_nr_mib(module_id_t module_idP, frame_t frameP, sub_frame_t slotP)
ssb_start_symbol = get_ssb_start_symbol(band,scs,i_ssb);
// if start symbol is in current slot, schedule current SSB, fill VRB map and call get_type0_PDCCH_CSS_config_parameters
if ((ssb_start_symbol/14) == rel_slot){
const int prb_offset = offset_pointa >> scs;
schedule_ssb(frameP, slotP, scc, dl_req, i_ssb, ssbSubcarrierOffset, offset_pointa, (*(uint32_t*)cc->MIB_pdu.payload) & ((1<<24)-1));
fill_ssb_vrb_map(cc, offset_pointa, ssb_start_symbol, CC_id);
fill_ssb_vrb_map(cc, prb_offset, ssbSubcarrierOffset, ssb_start_symbol, CC_id);
if (get_softmodem_params()->sa == 1) {
get_type0_PDCCH_CSS_config_parameters(&gNB->type0_PDCCH_CSS_config[i_ssb],
frameP,
@@ -221,7 +176,7 @@ void schedule_nr_mib(module_id_t module_idP, frame_t frameP, sub_frame_t slotP)
band,
i_ssb,
ssb_frame_periodicity,
offset_pointa);
prb_offset);
gNB->type0_PDCCH_CSS_config[i_ssb].active = true;
}
}
@@ -235,8 +190,9 @@ void schedule_nr_mib(module_id_t module_idP, frame_t frameP, sub_frame_t slotP)
ssb_start_symbol = get_ssb_start_symbol(band,scs,i_ssb);
// if start symbol is in current slot, schedule current SSB, fill VRB map and call get_type0_PDCCH_CSS_config_parameters
if ((ssb_start_symbol/14) == rel_slot){
const int prb_offset = offset_pointa >> scs;
schedule_ssb(frameP, slotP, scc, dl_req, i_ssb, ssbSubcarrierOffset, offset_pointa, (*(uint32_t*)cc->MIB_pdu.payload) & ((1<<24)-1));
fill_ssb_vrb_map(cc, offset_pointa, ssb_start_symbol, CC_id);
fill_ssb_vrb_map(cc, prb_offset, ssbSubcarrierOffset, ssb_start_symbol, CC_id);
if (get_softmodem_params()->sa == 1) {
get_type0_PDCCH_CSS_config_parameters(&gNB->type0_PDCCH_CSS_config[i_ssb],
frameP,
@@ -249,7 +205,7 @@ void schedule_nr_mib(module_id_t module_idP, frame_t frameP, sub_frame_t slotP)
band,
i_ssb,
ssb_frame_periodicity,
offset_pointa);
prb_offset);
gNB->type0_PDCCH_CSS_config[i_ssb].active = true;
}
}
@@ -264,8 +220,9 @@ void schedule_nr_mib(module_id_t module_idP, frame_t frameP, sub_frame_t slotP)
ssb_start_symbol = get_ssb_start_symbol(band,scs,i_ssb);
// if start symbol is in current slot, schedule current SSB, fill VRB map and call get_type0_PDCCH_CSS_config_parameters
if ((ssb_start_symbol/14) == rel_slot){
const int prb_offset = offset_pointa >> (scs-2); // reference 60kHz
schedule_ssb(frameP, slotP, scc, dl_req, i_ssb, ssbSubcarrierOffset, offset_pointa, (*(uint32_t*)cc->MIB_pdu.payload) & ((1<<24)-1));
fill_ssb_vrb_map(cc, offset_pointa, ssb_start_symbol, CC_id);
fill_ssb_vrb_map(cc, prb_offset, ssbSubcarrierOffset, ssb_start_symbol, CC_id);
const NR_TDD_UL_DL_Pattern_t *tdd = &scc->tdd_UL_DL_ConfigurationCommon->pattern1;
const int n_slots_frame = nr_slots_per_frame[*scc->ssbSubcarrierSpacing];
// FR2 is only TDD, to be fixed for flexible TDD
@@ -286,7 +243,7 @@ void schedule_nr_mib(module_id_t module_idP, frame_t frameP, sub_frame_t slotP)
band,
i_ssb,
ssb_frame_periodicity,
offset_pointa);
prb_offset);
gNB->type0_PDCCH_CSS_config[i_ssb].active = true;
}
}
@@ -306,7 +263,7 @@ void schedule_nr_SI(module_id_t module_idP, frame_t frameP, sub_frame_t subframe
//----------------------------------------
}
void fill_ssb_vrb_map (NR_COMMON_channels_t *cc, int rbStart, uint16_t symStart, int CC_id) {
void fill_ssb_vrb_map (NR_COMMON_channels_t *cc, int rbStart, int ssb_subcarrier_offset, uint16_t symStart, int CC_id) {
AssertFatal(*cc->ServingCellConfigCommon->ssbSubcarrierSpacing !=
NR_SubcarrierSpacing_kHz240,
@@ -314,7 +271,8 @@ void fill_ssb_vrb_map (NR_COMMON_channels_t *cc, int rbStart, uint16_t symStart
uint16_t *vrb_map = cc[CC_id].vrb_map;
for (int rb = 0; rb < 20; rb++)
const int extra_prb = ssb_subcarrier_offset > 0;
for (int rb = 0; rb < 20+extra_prb; rb++)
vrb_map[rbStart + rb] = SL_to_bitmap(symStart, 4);
}