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Adopting the dynamic implementation of DMRS at the gNB side

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- Using the implemented DMRS functionalities at the MAC layer at the gNB side
  - Removing is_dmrs_symbol function
  - Temporary implemetation at the UE side considering DMRS symbol is at the 1st PUSCH symbol,
    until the nFAPI structs for DMRS is adopted at the UE side
This commit is contained in:
Ahmed Hussein
2020-04-02 10:05:54 +02:00
committed by Thomas Schlichter
parent 5f194af906
commit 9a857e4486
8 changed files with 142 additions and 234 deletions
Download Patch File Download Diff File Expand all files Collapse all files
openair1/PHY/NR_REFSIG/dmrs_nr.c
-156
View File
@@ -35,143 +35,6 @@
/***********************************************************************/
// TS 38.211 Table 6.4.1.1.3-3: PUSCH DMRS positions l' within a slot for single-symbol DMRS and intra-slot frequency hopping disabled.
// The first 4 colomns are PUSCH mapping type A and the last 4 colomns are PUSCH mapping type B.
// When l' = l0, it is represented by 1
// E.g. when symbol duration is 12 in colomn 7, value 1057 ('10000100001') which means l' = l0, 5, 10.
int32_t table_6_4_1_1_3_3_pusch_dmrs_positions_l [12][8] = { // Duration in symbols
{-1, -1, -1, -1, 1, 1, 1, 1}, //<4 // (DMRS l' position)
{1, 1, 1, 1, 1, 1, 1, 1}, //4 // (DMRS l' position)
{1, 1, 1, 1, 1, 5, 5, 5}, //5 // (DMRS l' position)
{1, 1, 1, 1, 1, 5, 5, 5}, //6 // (DMRS l' position)
{1, 1, 1, 1, 1, 5, 5, 5}, //7 // (DMRS l' position)
{1, 129, 129, 129, 1, 65, 73, 73}, //8 // (DMRS l' position)
{1, 129, 129, 129, 1, 65, 73, 73}, //9 // (DMRS l' position)
{1, 513, 577, 577, 1, 257, 273, 585}, //10 // (DMRS l' position)
{1, 513, 577, 577, 1, 257, 273, 585}, //11 // (DMRS l' position)
{1, 513, 577, 2337, 1, 1025, 1057, 585}, //12 // (DMRS l' position)
{1, 2049, 2177, 2337, 1, 1025, 1057, 585}, //13 // (DMRS l' position)
{1, 2049, 2177, 2337, 1, 1025, 1057, 585}, //14 // (DMRS l' position)
};
// TS 38.211 Table 6.4.1.1.3-4: PUSCH DMRS positions l' within a slot for double-symbol DMRS and intra-slot frequency hopping disabled.
// The first 4 colomns are PUSCH mapping type A and the last 4 colomns are PUSCH mapping type B.
// When l' = l0, it is represented by 1
int32_t table_6_4_1_1_3_4_pusch_dmrs_positions_l [12][8] = { // Duration in symbols
{-1, -1, -1, -1, -1, -1, -1, -1}, //<4 // (DMRS l' position)
{1, 1, -1, -1, -1, -1, -1, -1}, //4 // (DMRS l' position)
{1, 1, -1, -1, 1, 1, -1, -1}, //5 // (DMRS l' position)
{1, 1, -1, -1, 1, 1, -1, -1}, //6 // (DMRS l' position)
{1, 1, -1, -1, 1, 1, -1, -1}, //7 // (DMRS l' position)
{1, 1, -1, -1, 1, 33, -1, -1}, //8 // (DMRS l' position)
{1, 1, -1, -1, 1, 33, -1, -1}, //9 // (DMRS l' position)
{1, 257, -1, -1, 1, 129, -1, -1}, //10 // (DMRS l' position)
{1, 257, -1, -1, 1, 129, -1, -1}, //11 // (DMRS l' position)
{1, 257, -1, -1, 1, 513, -1, -1}, //12 // (DMRS l' position)
{1, 1025, -1, -1, 1, 513, -1, -1}, //13 // (DMRS l' position)
{1, 1025, -1, -1, 1, 513, -1, -1}, //14 // (DMRS l' position)
};
int32_t get_l_prime(uint8_t duration_in_symbols, uint8_t mapping_type, pusch_dmrs_AdditionalPosition_t additional_pos, pusch_maxLength_t pusch_maxLength) {
uint8_t row, colomn;
int32_t l_prime;
colomn = additional_pos;
if (mapping_type == typeB)
colomn += 4;
if (duration_in_symbols < 4)
row = 0;
else
row = duration_in_symbols - 3;
if (pusch_maxLength == pusch_len1)
l_prime = table_6_4_1_1_3_3_pusch_dmrs_positions_l[row][colomn];
else
l_prime = table_6_4_1_1_3_4_pusch_dmrs_positions_l[row][colomn];
AssertFatal(l_prime>0,"invalid l_prime < 0\n");
return l_prime;
}
/*******************************************************************
*
* NAME : is_dmrs_symbol
*
* PARAMETERS : l ofdm symbol index within slot
* k subcarrier index
* start_sc first subcarrier index
* k_prime index alternating 0 and 1
* n index starting 0,1,...
* delta see Table 6.4.1.1.3
* duration_in_symbols number of scheduled PUSCH ofdm symbols
* dmrs_UplinkConfig DMRS uplink configuration
* mapping_type PUSCH mapping type (A or B)
* ofdm_symbol_size IFFT size
*
* RETURN : 0 if symbol(k,l) is data, or 1 if symbol(k,l) is dmrs
*
* DESCRIPTION : 3GPP TS 38.211 6.4.1.1 Demodulation reference signal for PUSCH
*
*********************************************************************/
uint8_t is_dmrs_symbol(uint8_t l,
uint16_t k,
uint16_t start_sc,
uint8_t k_prime,
uint16_t n,
uint8_t delta,
uint8_t duration_in_symbols,
uint8_t dmrs_type,
uint16_t ofdm_symbol_size) {
uint8_t is_dmrs_freq, is_dmrs_time, l0;
int32_t l_prime_mask;
pusch_dmrs_AdditionalPosition_t additional_pos = pusch_dmrs_pos0;
pusch_maxLength_t pusch_maxLength = pusch_len1;
uint8_t mapping_type = typeB;
is_dmrs_freq = 0;
is_dmrs_time = 0;
l0 = get_l0_ul(mapping_type, 2);
l_prime_mask = get_l_prime(duration_in_symbols, mapping_type, additional_pos, pusch_maxLength);
if (k == ((start_sc+get_dmrs_freq_idx_ul(n, k_prime, delta, dmrs_type))%ofdm_symbol_size))
is_dmrs_freq = 1;
if (l_prime_mask == 1){
if (l == l0)
is_dmrs_time = 1;
} else if ( (l==l0) || (((l_prime_mask>>l)&1) == 1 && l!=0) )
is_dmrs_time = 1;
if (pusch_maxLength == pusch_len2){
if (((l_prime_mask>>(l-1))&1) == 1 && l!=0 && l!=1)
is_dmrs_time = 1;
if (l-1 == l0)
is_dmrs_time = 1;
}
if (is_dmrs_time && is_dmrs_freq)
return 1;
else
return 0;
}
/*******************************************************************
*
@@ -364,25 +227,6 @@ void lte_gold_new(LTE_DL_FRAME_PARMS *frame_parms, uint32_t lte_gold_table[20][2
#endif
}
/*******************************************************************
*
* NAME : get_l0_ul
*
* PARAMETERS : mapping_type : PUSCH mapping type
* dmrs_typeA_position : higher layer parameter
*
* RETURN : demodulation reference signal for PUSCH
*
* DESCRIPTION : see TS 38.211 V15.4.0 Demodulation reference signals for PUSCH
*
*********************************************************************/
uint8_t get_l0_ul(uint8_t mapping_type, uint8_t dmrs_typeA_position) {
return ((mapping_type==typeA)?dmrs_typeA_position:0);
}
/*******************************************************************
*
* NAME : get_dmrs_freq_idx_ul
openair1/PHY/NR_REFSIG/dmrs_nr.h
-13
View File
@@ -54,21 +54,8 @@
int pseudo_random_sequence(int M_PN, uint32_t *c, uint32_t cinit);
void lte_gold_new(LTE_DL_FRAME_PARMS *frame_parms, uint32_t lte_gold_table[20][2][14], uint16_t Nid_cell);
void generate_dmrs_pbch(uint32_t dmrs_pbch_bitmap[DMRS_PBCH_I_SSB][DMRS_PBCH_N_HF][DMRS_BITMAP_SIZE], uint16_t Nid_cell);
uint8_t get_l0_ul(uint8_t mapping_type, uint8_t dmrs_typeA_position);
uint16_t get_dmrs_freq_idx_ul(uint16_t n, uint8_t k_prime, uint8_t delta, uint8_t dmrs_type);
int32_t get_l_prime(uint8_t duration_in_symbols, uint8_t mapping_type, pusch_dmrs_AdditionalPosition_t additional_pos, pusch_maxLength_t pusch_maxLength);
uint8_t is_dmrs_symbol(uint8_t l,
uint16_t k,
uint16_t start_sc,
uint8_t k_prime,
uint16_t n,
uint8_t delta,
uint8_t duration_in_symbols,
uint8_t dmrs_type,
uint16_t ofdm_symbol_size);
#undef EXTERN
#endif /* DMRS_NR_H */
openair1/PHY/NR_REFSIG/ptrs_nr.c
+9 -18
View File
@@ -144,24 +144,15 @@ void set_ptrs_symb_idx(uint16_t *ptrs_symbols,
last_symbol = start_symbol + duration_in_symbols - 1;
while ( (l_ref + i*L_ptrs) <= last_symbol) {
is_dmrs_symbol1 = is_dmrs_symbol(max((l_ref + (i-1)*L_ptrs + 1), l_ref),
0,
0,
0,
0,
0,
duration_in_symbols,
dmrs_type,
ofdm_symbol_size);
is_dmrs_symbol2 = is_dmrs_symbol(l_ref + i*L_ptrs,
0,
0,
0,
0,
0,
duration_in_symbols,
dmrs_type,
ofdm_symbol_size);
// [hna] Temporary implementation until nFAPI structs are adopted at UE side
// --------------------------
if(max((l_ref + (i-1)*L_ptrs + 1), l_ref) == start_symbol)
is_dmrs_symbol1 = 1;
if(l_ref + i*L_ptrs == start_symbol)
is_dmrs_symbol2 = 0;
// --------------------------
if ( is_dmrs_symbol1 + is_dmrs_symbol2 > 0 ) {
if (pusch_maxLength == 2)
openair1/PHY/NR_UE_TRANSPORT/nr_ulsch_ue.c
+23 -28
View File
@@ -136,16 +136,15 @@ void nr_ue_ulsch_procedures(PHY_VARS_NR_UE *UE,
start_symbol = harq_process_ul_ue->start_symbol;
for (i = start_symbol; i < start_symbol + harq_process_ul_ue->number_of_symbols; i++)
number_dmrs_symbols += is_dmrs_symbol((mapping_type)?i-start_symbol:i,
0,
0,
0,
0,
0,
harq_process_ul_ue->number_of_symbols,
UE->pusch_config.dmrs_UplinkConfig.pusch_dmrs_type,
frame_parms->ofdm_symbol_size);
for (i = start_symbol; i < start_symbol + harq_process_ul_ue->number_of_symbols; i++) {
// [hna] Temporary implementation until nFAPI structs are adopted at UE side
// --------------------------
if((mapping_type ? (i - start_symbol) : i) == start_symbol)
number_dmrs_symbols += 1;
// --------------------------
}
ulsch_ue->length_dmrs = number_dmrs_symbols; // pusch.MaxLenght is redundant here as number_dmrs_symbols
// contains all dmrs symbols even for double symbol dmrs
@@ -329,15 +328,13 @@ void nr_ue_ulsch_procedures(PHY_VARS_NR_UE *UE,
for (l = start_symbol; l < start_symbol + harq_process_ul_ue->number_of_symbols; l++) {
is_dmrs = is_dmrs_symbol((mapping_type)?l-start_symbol:l,
0,
0,
0,
0,
0,
harq_process_ul_ue->number_of_symbols,
dmrs_type,
frame_parms->ofdm_symbol_size);
// [hna] Temporary implementation until nFAPI structs are adopted at UE side
// --------------------------
if(((mapping_type)?l-start_symbol:l) == start_symbol)
is_dmrs = 1;
else
is_dmrs = 0;
// --------------------------
if (is_dmrs == 1)
nb_re_dmrs_per_rb = ulsch_ue->nb_re_dmrs;
@@ -397,15 +394,13 @@ void nr_ue_ulsch_procedures(PHY_VARS_NR_UE *UE,
is_dmrs = 0;
is_ptrs = 0;
is_dmrs = is_dmrs_symbol(l_ref,
k,
start_sc,
k_prime,
n,
delta,
harq_process_ul_ue->number_of_symbols,
dmrs_type,
frame_parms->ofdm_symbol_size);
// [hna] Temporary implementation until nFAPI structs are adopted at UE side
// --------------------------
if(l_ref == start_symbol) {
if (k == ((start_sc+get_dmrs_freq_idx_ul(n, k_prime, delta, dmrs_type))%frame_parms->ofdm_symbol_size))
is_dmrs = 1;
}
// --------------------------
if (UE->ptrs_configured == 1){
is_ptrs = is_ptrs_symbol(l,
openair1/SIMULATION/NR_PHY/ulsim.c
+6 -11
View File
@@ -503,16 +503,11 @@ int main(int argc, char **argv)
unsigned char mod_order;
uint16_t code_rate;
for (i = start_symbol; i < nb_symb_sch; i++)
number_dmrs_symbols += is_dmrs_symbol(i,
0,
0,
0,
0,
0,
nb_symb_sch,
UE->pusch_config.dmrs_UplinkConfig.pusch_dmrs_type,
frame_parms->ofdm_symbol_size);
uint16_t l_prime_mask = get_l_prime(nb_symb_sch, UE->pusch_config.dmrs_UplinkConfig.pusch_dmrs_type, pusch_dmrs_pos0, length_dmrs);
for (i = 0; i < nb_symb_sch; i++) {
number_dmrs_symbols += (l_prime_mask >> i) & 0x01;
}
mod_order = nr_get_Qm_ul(Imcs, 0);
nb_re_dmrs = ((UE->pusch_config.dmrs_UplinkConfig.pusch_dmrs_type == pusch_dmrs_type1) ? 6 : 4) * number_dmrs_symbols;
@@ -560,7 +555,7 @@ int main(int argc, char **argv)
pusch_pdu->transform_precoding = 0;
pusch_pdu->data_scrambling_id = 0;
pusch_pdu->nrOfLayers = 1;
pusch_pdu->ul_dmrs_symb_pos = 1;
pusch_pdu->ul_dmrs_symb_pos = l_prime_mask;
pusch_pdu->dmrs_config_type = 0;
pusch_pdu->ul_dmrs_scrambling_id = 0;
pusch_pdu->scid = 0;
openair2/LAYER2/NR_MAC_COMMON/nr_mac_common.c
+85
View File
@@ -79,6 +79,47 @@ nr_bandentry_t nr_bandtable[] = {
{261,27500000,28350000,27500000,28350000, 2,2070833, 120}
};
// TS 38.211 Table 6.4.1.1.3-3: PUSCH DMRS positions l' within a slot for single-symbol DMRS and intra-slot frequency hopping disabled.
// The first 4 colomns are PUSCH mapping type A and the last 4 colomns are PUSCH mapping type B.
// When l' = l0, it is represented by 1
// E.g. when symbol duration is 12 in colomn 7, value 1057 ('10000100001') which means l' = l0, 5, 10.
int32_t table_6_4_1_1_3_3_pusch_dmrs_positions_l [12][8] = { // Duration in symbols
{-1, -1, -1, -1, 1, 1, 1, 1}, //<4 // (DMRS l' position)
{1, 1, 1, 1, 1, 1, 1, 1}, //4 // (DMRS l' position)
{1, 1, 1, 1, 1, 5, 5, 5}, //5 // (DMRS l' position)
{1, 1, 1, 1, 1, 5, 5, 5}, //6 // (DMRS l' position)
{1, 1, 1, 1, 1, 5, 5, 5}, //7 // (DMRS l' position)
{1, 129, 129, 129, 1, 65, 73, 73}, //8 // (DMRS l' position)
{1, 129, 129, 129, 1, 65, 73, 73}, //9 // (DMRS l' position)
{1, 513, 577, 577, 1, 257, 273, 585}, //10 // (DMRS l' position)
{1, 513, 577, 577, 1, 257, 273, 585}, //11 // (DMRS l' position)
{1, 513, 577, 2337, 1, 1025, 1057, 585}, //12 // (DMRS l' position)
{1, 2049, 2177, 2337, 1, 1025, 1057, 585}, //13 // (DMRS l' position)
{1, 2049, 2177, 2337, 1, 1025, 1057, 585}, //14 // (DMRS l' position)
};
// TS 38.211 Table 6.4.1.1.3-4: PUSCH DMRS positions l' within a slot for double-symbol DMRS and intra-slot frequency hopping disabled.
// The first 4 colomns are PUSCH mapping type A and the last 4 colomns are PUSCH mapping type B.
// When l' = l0, it is represented by 1
int32_t table_6_4_1_1_3_4_pusch_dmrs_positions_l [12][8] = { // Duration in symbols
{-1, -1, -1, -1, -1, -1, -1, -1}, //<4 // (DMRS l' position)
{1, 1, -1, -1, -1, -1, -1, -1}, //4 // (DMRS l' position)
{1, 1, -1, -1, 1, 1, -1, -1}, //5 // (DMRS l' position)
{1, 1, -1, -1, 1, 1, -1, -1}, //6 // (DMRS l' position)
{1, 1, -1, -1, 1, 1, -1, -1}, //7 // (DMRS l' position)
{1, 1, -1, -1, 1, 33, -1, -1}, //8 // (DMRS l' position)
{1, 1, -1, -1, 1, 33, -1, -1}, //9 // (DMRS l' position)
{1, 257, -1, -1, 1, 129, -1, -1}, //10 // (DMRS l' position)
{1, 257, -1, -1, 1, 129, -1, -1}, //11 // (DMRS l' position)
{1, 257, -1, -1, 1, 513, -1, -1}, //12 // (DMRS l' position)
{1, 1025, -1, -1, 1, 513, -1, -1}, //13 // (DMRS l' position)
{1, 1025, -1, -1, 1, 513, -1, -1}, //14 // (DMRS l' position)
};
#define NR_BANDTABLE_SIZE (sizeof(nr_bandtable)/sizeof(nr_bandentry_t))
void get_band(uint64_t downlink_frequency,
@@ -517,6 +558,50 @@ int get_num_dmrs(uint16_t dmrs_mask ) {
return(num_dmrs);
}
/*******************************************************************
*
* NAME : get_l0_ul
*
* PARAMETERS : mapping_type : PUSCH mapping type
* dmrs_typeA_position : higher layer parameter
*
* RETURN : demodulation reference signal for PUSCH
*
* DESCRIPTION : see TS 38.211 V15.4.0 Demodulation reference signals for PUSCH
*
*********************************************************************/
uint8_t get_l0_ul(uint8_t mapping_type, uint8_t dmrs_typeA_position) {
return ((mapping_type==typeA)?dmrs_typeA_position:0);
}
int32_t get_l_prime(uint8_t duration_in_symbols, uint8_t mapping_type, pusch_dmrs_AdditionalPosition_t additional_pos, pusch_maxLength_t pusch_maxLength) {
uint8_t row, colomn;
int32_t l_prime;
colomn = additional_pos;
if (mapping_type == typeB)
colomn += 4;
if (duration_in_symbols < 4)
row = 0;
else
row = duration_in_symbols - 3;
if (pusch_maxLength == pusch_len1)
l_prime = table_6_4_1_1_3_3_pusch_dmrs_positions_l[row][colomn];
else
l_prime = table_6_4_1_1_3_4_pusch_dmrs_positions_l[row][colomn];
AssertFatal(l_prime>0,"invalid l_prime < 0\n");
return l_prime;
}
uint16_t nr_dci_size(nr_dci_format_t format,
nr_rnti_type_t rnti_type,
uint16_t N_RB) {
openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_phytest.c
+17 -8
View File
@@ -758,14 +758,6 @@ void nr_schedule_uss_ulsch_phytest(int Mod_idP,
pusch_pdu->transform_precoding = 0;
pusch_pdu->data_scrambling_id = 0; //It equals the higher-layer parameter Data-scrambling-Identity if configured and the RNTI equals the C-RNTI, otherwise L2 needs to set it to physical cell id.;
pusch_pdu->nrOfLayers = 1;
//DMRS
pusch_pdu->ul_dmrs_symb_pos = 1<<2; //for now the gnb assumes dmrs in the first symbol of the scheduled pusch resource
pusch_pdu->dmrs_config_type = 0; //dmrs-type 1 (the one with a single DMRS symbol in the beginning)
pusch_pdu->ul_dmrs_scrambling_id = 0; //If provided and the PUSCH is not a msg3 PUSCH, otherwise, L2 should set this to physical cell id.
pusch_pdu->scid = 0; //DMRS sequence initialization [TS38.211, sec 6.4.1.1.1]. Should match what is sent in DCI 0_1, otherwise set to 0.
//pusch_pdu->num_dmrs_cdm_grps_no_data;
//pusch_pdu->dmrs_ports; //DMRS ports. [TS38.212 7.3.1.1.2] provides description between DCI 0-1 content and DMRS ports. Bitmap occupying the 11 LSBs with: bit 0: antenna port 1000 bit 11: antenna port 1011 and for each bit 0: DMRS port not used 1: DMRS port used
//Pusch Allocation in frequency domain [TS38.214, sec 6.1.2.2]
pusch_pdu->resource_alloc = 1; //type 1
//pusch_pdu->rb_bitmap;// for ressource alloc type 0
pusch_pdu->rb_start = 0;
@@ -777,6 +769,23 @@ void nr_schedule_uss_ulsch_phytest(int Mod_idP,
//Resource Allocation in time domain
pusch_pdu->start_symbol_index = 2;
pusch_pdu->nr_of_symbols = 12;
// --------------------
// ------- DMRS -------
// --------------------
uint16_t l_prime_mask = get_l_prime(pusch_pdu->nr_of_symbols, typeB, pusch_dmrs_pos0, pusch_len1);
pusch_pdu->ul_dmrs_symb_pos = l_prime_mask;
pusch_pdu->dmrs_config_type = 0; // dmrs-type 1 (the one with a single DMRS symbol in the beginning)
pusch_pdu->ul_dmrs_scrambling_id = 0; // If provided and the PUSCH is not a msg3 PUSCH, otherwise, L2 should set this to physical cell id
pusch_pdu->scid = 0; // DMRS sequence initialization [TS38.211, sec 6.4.1.1.1]
// Should match what is sent in DCI 0_1, otherwise set to 0
//pusch_pdu->num_dmrs_cdm_grps_no_data;
//pusch_pdu->dmrs_ports; // DMRS ports. [TS38.212 7.3.1.1.2] provides description between DCI 0-1 content and DMRS ports
// Bitmap occupying the 11 LSBs with: bit 0: antenna port 1000 bit 11: antenna port 1011,
// and for each bit 0: DMRS port not used 1: DMRS port used
// --------------------------------------------------------------------------------------------------------------------------------------------
//Pusch Allocation in frequency domain [TS38.214, sec 6.1.2.2]
//Optional Data only included if indicated in pduBitmap
pusch_pdu->pusch_data.rv_index = 0;
pusch_pdu->pusch_data.harq_process_id = 0;
openair2/LAYER2/NR_MAC_gNB/mac_proto.h
+2
View File
@@ -162,6 +162,8 @@ int find_nr_UE_id(module_id_t mod_idP, rnti_t rntiP);
int add_new_nr_ue(module_id_t mod_idP, rnti_t rntiP);
int get_num_dmrs(uint16_t dmrs_mask );
uint8_t get_l0_ul(uint8_t mapping_type, uint8_t dmrs_typeA_position);
int32_t get_l_prime(uint8_t duration_in_symbols, uint8_t mapping_type, pusch_dmrs_AdditionalPosition_t additional_pos, pusch_maxLength_t pusch_maxLength);
uint16_t nr_dci_size(nr_dci_format_t format,
nr_rnti_type_t rnti_type,