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openairinterface5g/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_dlsch.c
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/*
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The OpenAirInterface Software Alliance licenses this file to You under
* the OAI Public License, Version 1.1 (the "License"); you may not use this file
* except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.openairinterface.org/?page_id=698
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
/*! \file gNB_scheduler_dlsch.c
* \brief procedures related to gNB for the DLSCH transport channel
* \author Guido Casati
* \date 2019
* \email: guido.casati@iis.fraunhofe.de
* \version 1.0
* @ingroup _mac
*/
/*PHY*/
#include "PHY/CODING/coding_defs.h"
#include "PHY/defs_nr_common.h"
#include "common/utils/nr/nr_common.h"
#include "PHY/NR_TRANSPORT/nr_transport_common_proto.h"
/*MAC*/
#include "NR_MAC_COMMON/nr_mac.h"
#include "NR_MAC_gNB/nr_mac_gNB.h"
#include "NR_MAC_COMMON/nr_mac_extern.h"
#include "LAYER2/NR_MAC_gNB/mac_proto.h"
/*NFAPI*/
#include "nfapi_nr_interface.h"
/*TAG*/
#include "NR_TAG-Id.h"
/*Softmodem params*/
#include "executables/softmodem-common.h"
////////////////////////////////////////////////////////
/////* DLSCH MAC PDU generation (6.1.2 TS 38.321) */////
////////////////////////////////////////////////////////
#define OCTET 8
#define HALFWORD 16
#define WORD 32
//#define SIZE_OF_POINTER sizeof (void *)
// Compute and write all MAC CEs and subheaders, and return number of written
// bytes
int nr_write_ce_dlsch_pdu(module_id_t module_idP,
const NR_UE_sched_ctrl_t *ue_sched_ctl,
unsigned char *mac_pdu,
unsigned char drx_cmd,
unsigned char *ue_cont_res_id)
{
gNB_MAC_INST *gNB = RC.nrmac[module_idP];
NR_MAC_SUBHEADER_FIXED *mac_pdu_ptr = (NR_MAC_SUBHEADER_FIXED *) mac_pdu;
uint8_t last_size = 0;
int offset = 0, mac_ce_size, i, timing_advance_cmd, tag_id = 0;
// MAC CEs
uint8_t mac_header_control_elements[16], *ce_ptr;
ce_ptr = &mac_header_control_elements[0];
// DRX command subheader (MAC CE size 0)
if (drx_cmd != 255) {
mac_pdu_ptr->R = 0;
mac_pdu_ptr->LCID = DL_SCH_LCID_DRX;
//last_size = 1;
mac_pdu_ptr++;
}
// Timing Advance subheader
/* This was done only when timing_advance_cmd != 31
// now TA is always send when ta_timer resets regardless of its value
// this is done to avoid issues with the timeAlignmentTimer which is
// supposed to monitor if the UE received TA or not */
if (ue_sched_ctl->ta_apply) {
mac_pdu_ptr->R = 0;
mac_pdu_ptr->LCID = DL_SCH_LCID_TA_COMMAND;
//last_size = 1;
mac_pdu_ptr++;
// TA MAC CE (1 octet)
timing_advance_cmd = ue_sched_ctl->ta_update;
AssertFatal(timing_advance_cmd < 64, "timing_advance_cmd %d > 63\n", timing_advance_cmd);
((NR_MAC_CE_TA *) ce_ptr)->TA_COMMAND = timing_advance_cmd; //(timing_advance_cmd+31)&0x3f;
if (gNB->tag->tag_Id != 0) {
tag_id = gNB->tag->tag_Id;
((NR_MAC_CE_TA *) ce_ptr)->TAGID = tag_id;
}
LOG_D(MAC, "NR MAC CE timing advance command = %d (%d) TAG ID = %d\n", timing_advance_cmd, ((NR_MAC_CE_TA *) ce_ptr)->TA_COMMAND, tag_id);
mac_ce_size = sizeof(NR_MAC_CE_TA);
// Copying bytes for MAC CEs to the mac pdu pointer
memcpy((void *) mac_pdu_ptr, (void *) ce_ptr, mac_ce_size);
ce_ptr += mac_ce_size;
mac_pdu_ptr += (unsigned char) mac_ce_size;
}
// Contention resolution fixed subheader and MAC CE
if (ue_cont_res_id) {
mac_pdu_ptr->R = 0;
mac_pdu_ptr->LCID = DL_SCH_LCID_CON_RES_ID;
mac_pdu_ptr++;
//last_size = 1;
// contention resolution identity MAC ce has a fixed 48 bit size
// this contains the UL CCCH SDU. If UL CCCH SDU is longer than 48 bits,
// it contains the first 48 bits of the UL CCCH SDU
LOG_T(MAC, "[gNB ][RAPROC] Generate contention resolution msg: %x.%x.%x.%x.%x.%x\n",
ue_cont_res_id[0], ue_cont_res_id[1], ue_cont_res_id[2],
ue_cont_res_id[3], ue_cont_res_id[4], ue_cont_res_id[5]);
// Copying bytes (6 octects) to CEs pointer
mac_ce_size = 6;
memcpy(ce_ptr, ue_cont_res_id, mac_ce_size);
// Copying bytes for MAC CEs to mac pdu pointer
memcpy((void *) mac_pdu_ptr, (void *) ce_ptr, mac_ce_size);
ce_ptr += mac_ce_size;
mac_pdu_ptr += (unsigned char) mac_ce_size;
}
//TS 38.321 Sec 6.1.3.15 TCI State indication for UE Specific PDCCH MAC CE SubPDU generation
if (ue_sched_ctl->UE_mac_ce_ctrl.pdcch_state_ind.is_scheduled) {
//filling subheader
mac_pdu_ptr->R = 0;
mac_pdu_ptr->LCID = DL_SCH_LCID_TCI_STATE_IND_UE_SPEC_PDCCH;
mac_pdu_ptr++;
//Creating the instance of CE structure
NR_TCI_PDCCH nr_UESpec_TCI_StateInd_PDCCH;
//filling the CE structre
nr_UESpec_TCI_StateInd_PDCCH.CoresetId1 = ((ue_sched_ctl->UE_mac_ce_ctrl.pdcch_state_ind.coresetId) & 0xF) >> 1; //extracting MSB 3 bits from LS nibble
nr_UESpec_TCI_StateInd_PDCCH.ServingCellId = (ue_sched_ctl->UE_mac_ce_ctrl.pdcch_state_ind.servingCellId) & 0x1F; //extracting LSB 5 Bits
nr_UESpec_TCI_StateInd_PDCCH.TciStateId = (ue_sched_ctl->UE_mac_ce_ctrl.pdcch_state_ind.tciStateId) & 0x7F; //extracting LSB 7 bits
nr_UESpec_TCI_StateInd_PDCCH.CoresetId2 = (ue_sched_ctl->UE_mac_ce_ctrl.pdcch_state_ind.coresetId) & 0x1; //extracting LSB 1 bit
LOG_D(MAC, "NR MAC CE TCI state indication for UE Specific PDCCH = %d \n", nr_UESpec_TCI_StateInd_PDCCH.TciStateId);
mac_ce_size = sizeof(NR_TCI_PDCCH);
// Copying bytes for MAC CEs to the mac pdu pointer
memcpy((void *) mac_pdu_ptr, (void *)&nr_UESpec_TCI_StateInd_PDCCH, mac_ce_size);
//incrementing the PDU pointer
mac_pdu_ptr += (unsigned char) mac_ce_size;
}
//TS 38.321 Sec 6.1.3.16, SP CSI reporting on PUCCH Activation/Deactivation MAC CE
if (ue_sched_ctl->UE_mac_ce_ctrl.SP_CSI_reporting_pucch.is_scheduled) {
//filling the subheader
mac_pdu_ptr->R = 0;
mac_pdu_ptr->LCID = DL_SCH_LCID_SP_CSI_REP_PUCCH_ACT;
mac_pdu_ptr++;
//creating the instance of CE structure
NR_PUCCH_CSI_REPORTING nr_PUCCH_CSI_reportingActDeact;
//filling the CE structure
nr_PUCCH_CSI_reportingActDeact.BWP_Id = (ue_sched_ctl->UE_mac_ce_ctrl.SP_CSI_reporting_pucch.bwpId) & 0x3; //extracting LSB 2 bibs
nr_PUCCH_CSI_reportingActDeact.ServingCellId = (ue_sched_ctl->UE_mac_ce_ctrl.SP_CSI_reporting_pucch.servingCellId) & 0x1F; //extracting LSB 5 bits
nr_PUCCH_CSI_reportingActDeact.S0 = ue_sched_ctl->UE_mac_ce_ctrl.SP_CSI_reporting_pucch.s0tos3_actDeact[0];
nr_PUCCH_CSI_reportingActDeact.S1 = ue_sched_ctl->UE_mac_ce_ctrl.SP_CSI_reporting_pucch.s0tos3_actDeact[1];
nr_PUCCH_CSI_reportingActDeact.S2 = ue_sched_ctl->UE_mac_ce_ctrl.SP_CSI_reporting_pucch.s0tos3_actDeact[2];
nr_PUCCH_CSI_reportingActDeact.S3 = ue_sched_ctl->UE_mac_ce_ctrl.SP_CSI_reporting_pucch.s0tos3_actDeact[3];
nr_PUCCH_CSI_reportingActDeact.R2 = 0;
mac_ce_size = sizeof(NR_PUCCH_CSI_REPORTING);
// Copying MAC CE data to the mac pdu pointer
memcpy((void *) mac_pdu_ptr, (void *)&nr_PUCCH_CSI_reportingActDeact, mac_ce_size);
//incrementing the PDU pointer
mac_pdu_ptr += (unsigned char) mac_ce_size;
}
//TS 38.321 Sec 6.1.3.14, TCI State activation/deactivation for UE Specific PDSCH MAC CE
if (ue_sched_ctl->UE_mac_ce_ctrl.pdsch_TCI_States_ActDeact.is_scheduled) {
//Computing the number of octects to be allocated for Flexible array member
//of MAC CE structure
uint8_t num_octects = (ue_sched_ctl->UE_mac_ce_ctrl.pdsch_TCI_States_ActDeact.highestTciStateActivated) / 8 + 1; //Calculating the number of octects for allocating the memory
//filling the subheader
((NR_MAC_SUBHEADER_SHORT *) mac_pdu_ptr)->R = 0;
((NR_MAC_SUBHEADER_SHORT *) mac_pdu_ptr)->F = 0;
((NR_MAC_SUBHEADER_SHORT *) mac_pdu_ptr)->LCID = DL_SCH_LCID_TCI_STATE_ACT_UE_SPEC_PDSCH;
((NR_MAC_SUBHEADER_SHORT *) mac_pdu_ptr)->L = sizeof(NR_TCI_PDSCH_APERIODIC_CSI) + num_octects * sizeof(uint8_t);
last_size = 2;
//Incrementing the PDU pointer
mac_pdu_ptr += last_size;
//allocating memory for CE Structure
NR_TCI_PDSCH_APERIODIC_CSI *nr_UESpec_TCI_StateInd_PDSCH = (NR_TCI_PDSCH_APERIODIC_CSI *)malloc(sizeof(NR_TCI_PDSCH_APERIODIC_CSI) + num_octects * sizeof(uint8_t));
//initializing to zero
memset((void *)nr_UESpec_TCI_StateInd_PDSCH, 0, sizeof(NR_TCI_PDSCH_APERIODIC_CSI) + num_octects * sizeof(uint8_t));
//filling the CE Structure
nr_UESpec_TCI_StateInd_PDSCH->BWP_Id = (ue_sched_ctl->UE_mac_ce_ctrl.pdsch_TCI_States_ActDeact.bwpId) & 0x3; //extracting LSB 2 Bits
nr_UESpec_TCI_StateInd_PDSCH->ServingCellId = (ue_sched_ctl->UE_mac_ce_ctrl.pdsch_TCI_States_ActDeact.servingCellId) & 0x1F; //extracting LSB 5 bits
for(i = 0; i < (num_octects * 8); i++) {
if(ue_sched_ctl->UE_mac_ce_ctrl.pdsch_TCI_States_ActDeact.tciStateActDeact[i])
nr_UESpec_TCI_StateInd_PDSCH->T[i / 8] = nr_UESpec_TCI_StateInd_PDSCH->T[i / 8] | (1 << (i % 8));
}
mac_ce_size = sizeof(NR_TCI_PDSCH_APERIODIC_CSI) + num_octects * sizeof(uint8_t);
//Copying bytes for MAC CEs to the mac pdu pointer
memcpy((void *) mac_pdu_ptr, (void *)nr_UESpec_TCI_StateInd_PDSCH, mac_ce_size);
//incrementing the mac pdu pointer
mac_pdu_ptr += (unsigned char) mac_ce_size;
//freeing the allocated memory
free(nr_UESpec_TCI_StateInd_PDSCH);
}
//TS38.321 Sec 6.1.3.13 Aperiodic CSI Trigger State Subselection MAC CE
if (ue_sched_ctl->UE_mac_ce_ctrl.aperi_CSI_trigger.is_scheduled) {
//Computing the number of octects to be allocated for Flexible array member
//of MAC CE structure
uint8_t num_octects = (ue_sched_ctl->UE_mac_ce_ctrl.aperi_CSI_trigger.highestTriggerStateSelected) / 8 + 1; //Calculating the number of octects for allocating the memory
//filling the subheader
((NR_MAC_SUBHEADER_SHORT *) mac_pdu_ptr)->R = 0;
((NR_MAC_SUBHEADER_SHORT *) mac_pdu_ptr)->F = 0;
((NR_MAC_SUBHEADER_SHORT *) mac_pdu_ptr)->LCID = DL_SCH_LCID_APERIODIC_CSI_TRI_STATE_SUBSEL;
((NR_MAC_SUBHEADER_SHORT *) mac_pdu_ptr)->L = sizeof(NR_TCI_PDSCH_APERIODIC_CSI) + num_octects * sizeof(uint8_t);
last_size = 2;
//Incrementing the PDU pointer
mac_pdu_ptr += last_size;
//allocating memory for CE structure
NR_TCI_PDSCH_APERIODIC_CSI *nr_Aperiodic_CSI_Trigger = (NR_TCI_PDSCH_APERIODIC_CSI *)malloc(sizeof(NR_TCI_PDSCH_APERIODIC_CSI) + num_octects * sizeof(uint8_t));
//initializing to zero
memset((void *)nr_Aperiodic_CSI_Trigger, 0, sizeof(NR_TCI_PDSCH_APERIODIC_CSI) + num_octects * sizeof(uint8_t));
//filling the CE Structure
nr_Aperiodic_CSI_Trigger->BWP_Id = (ue_sched_ctl->UE_mac_ce_ctrl.aperi_CSI_trigger.bwpId) & 0x3; //extracting LSB 2 bits
nr_Aperiodic_CSI_Trigger->ServingCellId = (ue_sched_ctl->UE_mac_ce_ctrl.aperi_CSI_trigger.servingCellId) & 0x1F; //extracting LSB 5 bits
nr_Aperiodic_CSI_Trigger->R = 0;
for(i = 0; i < (num_octects * 8); i++) {
if(ue_sched_ctl->UE_mac_ce_ctrl.aperi_CSI_trigger.triggerStateSelection[i])
nr_Aperiodic_CSI_Trigger->T[i / 8] = nr_Aperiodic_CSI_Trigger->T[i / 8] | (1 << (i % 8));
}
mac_ce_size = sizeof(NR_TCI_PDSCH_APERIODIC_CSI) + num_octects * sizeof(uint8_t);
// Copying bytes for MAC CEs to the mac pdu pointer
memcpy((void *) mac_pdu_ptr, (void *)nr_Aperiodic_CSI_Trigger, mac_ce_size);
//incrementing the mac pdu pointer
mac_pdu_ptr += (unsigned char) mac_ce_size;
//freeing the allocated memory
free(nr_Aperiodic_CSI_Trigger);
}
if (ue_sched_ctl->UE_mac_ce_ctrl.sp_zp_csi_rs.is_scheduled) {
((NR_MAC_SUBHEADER_FIXED *) mac_pdu_ptr)->R = 0;
((NR_MAC_SUBHEADER_FIXED *) mac_pdu_ptr)->LCID = DL_SCH_LCID_SP_ZP_CSI_RS_RES_SET_ACT;
mac_pdu_ptr++;
((NR_MAC_CE_SP_ZP_CSI_RS_RES_SET *) mac_pdu_ptr)->A_D = ue_sched_ctl->UE_mac_ce_ctrl.sp_zp_csi_rs.act_deact;
((NR_MAC_CE_SP_ZP_CSI_RS_RES_SET *) mac_pdu_ptr)->CELLID = ue_sched_ctl->UE_mac_ce_ctrl.sp_zp_csi_rs.serv_cell_id & 0x1F; //5 bits
((NR_MAC_CE_SP_ZP_CSI_RS_RES_SET *) mac_pdu_ptr)->BWPID = ue_sched_ctl->UE_mac_ce_ctrl.sp_zp_csi_rs.bwpid & 0x3; //2 bits
((NR_MAC_CE_SP_ZP_CSI_RS_RES_SET *) mac_pdu_ptr)->CSIRS_RSC_ID = ue_sched_ctl->UE_mac_ce_ctrl.sp_zp_csi_rs.rsc_id & 0xF; //4 bits
((NR_MAC_CE_SP_ZP_CSI_RS_RES_SET *) mac_pdu_ptr)->R = 0;
LOG_D(MAC, "NR MAC CE of ZP CSIRS Serv cell ID = %d BWPID= %d Rsc set ID = %d\n", ue_sched_ctl->UE_mac_ce_ctrl.sp_zp_csi_rs.serv_cell_id, ue_sched_ctl->UE_mac_ce_ctrl.sp_zp_csi_rs.bwpid,
ue_sched_ctl->UE_mac_ce_ctrl.sp_zp_csi_rs.rsc_id);
mac_ce_size = sizeof(NR_MAC_CE_SP_ZP_CSI_RS_RES_SET);
mac_pdu_ptr += (unsigned char) mac_ce_size;
}
if (ue_sched_ctl->UE_mac_ce_ctrl.csi_im.is_scheduled) {
mac_pdu_ptr->R = 0;
mac_pdu_ptr->LCID = DL_SCH_LCID_SP_CSI_RS_CSI_IM_RES_SET_ACT;
mac_pdu_ptr++;
CSI_RS_CSI_IM_ACT_DEACT_MAC_CE csi_rs_im_act_deact_ce;
csi_rs_im_act_deact_ce.A_D = ue_sched_ctl->UE_mac_ce_ctrl.csi_im.act_deact;
csi_rs_im_act_deact_ce.SCID = ue_sched_ctl->UE_mac_ce_ctrl.csi_im.serv_cellid & 0x3F;//gNB_PHY -> ssb_pdu.ssb_pdu_rel15.PhysCellId;
csi_rs_im_act_deact_ce.BWP_ID = ue_sched_ctl->UE_mac_ce_ctrl.csi_im.bwp_id;
csi_rs_im_act_deact_ce.R1 = 0;
csi_rs_im_act_deact_ce.IM = ue_sched_ctl->UE_mac_ce_ctrl.csi_im.im;// IF set CSI IM Rsc id will presesent else CSI IM RSC ID is abscent
csi_rs_im_act_deact_ce.SP_CSI_RSID = ue_sched_ctl->UE_mac_ce_ctrl.csi_im.nzp_csi_rsc_id;
if ( csi_rs_im_act_deact_ce.IM ) { //is_scheduled if IM is 1 else this field will not present
csi_rs_im_act_deact_ce.R2 = 0;
csi_rs_im_act_deact_ce.SP_CSI_IMID = ue_sched_ctl->UE_mac_ce_ctrl.csi_im.csi_im_rsc_id;
mac_ce_size = sizeof ( csi_rs_im_act_deact_ce ) - sizeof ( csi_rs_im_act_deact_ce.TCI_STATE );
} else {
mac_ce_size = sizeof ( csi_rs_im_act_deact_ce ) - sizeof ( csi_rs_im_act_deact_ce.TCI_STATE ) - 1;
}
memcpy ((void *) mac_pdu_ptr, (void *) & ( csi_rs_im_act_deact_ce), mac_ce_size);
mac_pdu_ptr += (unsigned char) mac_ce_size;
if (csi_rs_im_act_deact_ce.A_D ) { //Following IE is_scheduled only if A/D is 1
mac_ce_size = sizeof ( struct TCI_S);
for ( i = 0; i < ue_sched_ctl->UE_mac_ce_ctrl.csi_im.nb_tci_resource_set_id; i++) {
csi_rs_im_act_deact_ce.TCI_STATE.R = 0;
csi_rs_im_act_deact_ce.TCI_STATE.TCI_STATE_ID = ue_sched_ctl->UE_mac_ce_ctrl.csi_im.tci_state_id [i] & 0x7F;
memcpy ((void *) mac_pdu_ptr, (void *) & (csi_rs_im_act_deact_ce.TCI_STATE), mac_ce_size);
mac_pdu_ptr += (unsigned char) mac_ce_size;
}
}
}
// compute final offset
offset = ((unsigned char *) mac_pdu_ptr - mac_pdu);
//printf("Offset %d \n", ((unsigned char *) mac_pdu_ptr - mac_pdu));
return offset;
}
int getNrOfSymbols(NR_BWP_Downlink_t *bwp, int tda) {
struct NR_PDSCH_TimeDomainResourceAllocationList *tdaList =
bwp->bwp_Common->pdsch_ConfigCommon->choice.setup->pdsch_TimeDomainAllocationList;
AssertFatal(tda < tdaList->list.count,
"time_domain_allocation %d>=%d\n",
tda,
tdaList->list.count);
const int startSymbolAndLength = tdaList->list.array[tda]->startSymbolAndLength;
int startSymbolIndex, nrOfSymbols;
SLIV2SL(startSymbolAndLength, &startSymbolIndex, &nrOfSymbols);
return nrOfSymbols;
}
nfapi_nr_dmrs_type_e getDmrsConfigType(NR_BWP_Downlink_t *bwp) {
return bwp->bwp_Dedicated->pdsch_Config->choice.setup->dmrs_DownlinkForPDSCH_MappingTypeA->choice.setup->dmrs_Type == NULL ? 0 : 1;
}
uint8_t getN_PRB_DMRS(NR_BWP_Downlink_t *bwp, int numDmrsCdmGrpsNoData) {
const nfapi_nr_dmrs_type_e dmrsConfigType = getDmrsConfigType(bwp);
if (dmrsConfigType == NFAPI_NR_DMRS_TYPE1) {
// if no data in dmrs cdm group is 1 only even REs have no data
// if no data in dmrs cdm group is 2 both odd and even REs have no data
return numDmrsCdmGrpsNoData * 6;
} else {
return numDmrsCdmGrpsNoData * 4;
}
}
void nr_store_dlsch_buffer(module_id_t module_id,
frame_t frame,
sub_frame_t slot) {
NR_UE_info_t *UE_info = &RC.nrmac[module_id]->UE_info;
for (int UE_id = UE_info->list.head; UE_id >= 0; UE_id = UE_info->list.next[UE_id]) {
NR_UE_sched_ctrl_t *sched_ctrl = &UE_info->UE_sched_ctrl[UE_id];
sched_ctrl->num_total_bytes = 0;
const int lcid = DL_SCH_LCID_DTCH;
const uint16_t rnti = UE_info->rnti[UE_id];
sched_ctrl->rlc_status[lcid] = mac_rlc_status_ind(module_id,
rnti,
module_id,
frame,
slot,
ENB_FLAG_YES,
MBMS_FLAG_NO,
lcid,
0,
0);
sched_ctrl->num_total_bytes += sched_ctrl->rlc_status[lcid].bytes_in_buffer;
LOG_D(MAC,
"[%s][%d.%d], DTCH%d->DLSCH, RLC status %d bytes TA %d\n",
__func__,
frame,
slot,
lcid,
sched_ctrl->rlc_status[lcid].bytes_in_buffer,
sched_ctrl->ta_apply);
}
}
bool allocate_retransmission(module_id_t module_id,
uint8_t *rballoc_mask,
int *n_rb_sched,
int UE_id,
int current_harq_pid){
NR_UE_sched_ctrl_t *sched_ctrl = &RC.nrmac[module_id]->UE_info.UE_sched_ctrl[UE_id];
NR_UE_ret_info_t *retInfo = &sched_ctrl->retInfo[current_harq_pid];
const uint16_t bwpSize = NRRIV2BW(sched_ctrl->active_bwp->bwp_Common->genericParameters.locationAndBandwidth, MAX_BWP_SIZE);
int rbStart = NRRIV2PRBOFFSET(sched_ctrl->active_bwp->bwp_Common->genericParameters.locationAndBandwidth, MAX_BWP_SIZE);
sched_ctrl->time_domain_allocation = retInfo->time_domain_allocation;
/* ensure that there is a free place for RB allocation */
int rbSize = 0;
while (rbSize < retInfo->rbSize) {
rbStart += rbSize; /* last iteration rbSize was not enough, skip it */
rbSize = 0;
while (rbStart < bwpSize && !rballoc_mask[rbStart]) rbStart++;
if (rbStart >= bwpSize) {
LOG_D(MAC,
"cannot allocate retransmission for UE %d/RNTI %04x: no resources\n",
UE_id,
RC.nrmac[module_id]->UE_info.rnti[UE_id]);
return false;
}
while (rbStart + rbSize < bwpSize
&& rballoc_mask[rbStart + rbSize]
&& rbSize < retInfo->rbSize)
rbSize++;
}
sched_ctrl->rbSize = retInfo->rbSize;
sched_ctrl->rbStart = rbStart;
/* MCS etc: just reuse from previous scheduling opportunity */
sched_ctrl->mcsTableIdx = retInfo->mcsTableIdx;
sched_ctrl->mcs = retInfo->mcs;
sched_ctrl->numDmrsCdmGrpsNoData = retInfo->numDmrsCdmGrpsNoData;
/* retransmissions: directly allocate */
*n_rb_sched -= sched_ctrl->rbSize;
for (int rb = 0; rb < sched_ctrl->rbSize; rb++)
rballoc_mask[rb+sched_ctrl->rbStart] = 0;
return true;
}
float thr_ue[MAX_MOBILES_PER_GNB];
void pf_dl(module_id_t module_id,
frame_t frame,
sub_frame_t slot,
NR_list_t *UE_list,
int n_rb_sched,
uint8_t *rballoc_mask,
int max_num_ue) {
NR_UE_info_t *UE_info = &RC.nrmac[module_id]->UE_info;
float coeff_ue[MAX_MOBILES_PER_GNB];
// UEs that could be scheduled
int ue_array[MAX_MOBILES_PER_GNB];
NR_list_t UE_sched = { .head = -1, .next = ue_array, .tail = -1, .len = MAX_MOBILES_PER_GNB };
/* Loop UE_info->list to check retransmission */
for (int UE_id = UE_list->head; UE_id >= 0; UE_id = UE_list->next[UE_id]) {
NR_UE_sched_ctrl_t *sched_ctrl = &UE_info->UE_sched_ctrl[UE_id];
sched_ctrl->search_space = get_searchspace(sched_ctrl->active_bwp, NR_SearchSpace__searchSpaceType_PR_ue_Specific);
sched_ctrl->coreset = get_coreset(sched_ctrl->active_bwp, sched_ctrl->search_space, 1 /* dedicated */);
/* get the PID of a HARQ process awaiting retrnasmission, or -1 otherwise */
sched_ctrl->dl_harq_pid = sched_ctrl->retrans_dl_harq.head;
const rnti_t rnti = UE_info->rnti[UE_id];
/* Calculate Throughput */
const float a = 0.0005f; // corresponds to 200ms window
const uint32_t b = UE_info->mac_stats[UE_id].dlsch_current_bytes;
thr_ue[UE_id] = (1 - a) * thr_ue[UE_id] + a * b;
/* retransmission */
if (sched_ctrl->dl_harq_pid >= 0) {
/* Find a free CCE */
bool freeCCE = find_free_CCE(module_id, slot, UE_id);
if (!freeCCE){
LOG_D(MAC, "%4d.%2d could not find CCE for DL DCI retransmission UE %d/RNTI %04x\n", frame, slot, UE_id, rnti);
continue;
}
/* Find PUCCH occasion: if it fails, undo CCE allocation (undoing PUCCH
* allocation after CCE alloc fail would be more complex) */
const bool alloc = nr_acknack_scheduling(module_id, UE_id, frame, slot);
if (!alloc) {
LOG_W(MAC,
"%s(): could not find PUCCH for UE %d/%04x@%d.%d\n",
__func__,
UE_id,
rnti,
frame,
slot);
int cid = sched_ctrl->coreset->controlResourceSetId;
UE_info->num_pdcch_cand[UE_id][cid]--;
int *cce_list = RC.nrmac[module_id]->cce_list[sched_ctrl->active_bwp->bwp_Id][cid];
for (int i = 0; i < sched_ctrl->aggregation_level; i++)
cce_list[sched_ctrl->cce_index + i] = 0;
return;
}
/* Allocate retransmission */
bool r = allocate_retransmission(module_id, rballoc_mask, &n_rb_sched, UE_id, sched_ctrl->dl_harq_pid);
if (!r) {
LOG_D(MAC, "%4d.%2d retransmission can NOT be allocated\n", frame, slot);
continue;
}
/* reduce max_num_ue once we are sure UE can be allocated, i.e., has CCE */
max_num_ue--;
if (max_num_ue < 0) return;
} else {
/* Check DL buffer and skip this UE if no bytes and no TA necessary */
if (sched_ctrl->num_total_bytes == 0 && frame != (sched_ctrl->ta_frame + 10) % 1024)
continue;
/* Calculate coeff */
sched_ctrl->time_domain_allocation = 2;
sched_ctrl->mcsTableIdx = 0;
sched_ctrl->mcs = 9;
sched_ctrl->numDmrsCdmGrpsNoData = 1;
uint8_t N_PRB_DMRS =
getN_PRB_DMRS(sched_ctrl->active_bwp, sched_ctrl->numDmrsCdmGrpsNoData);
int nrOfSymbols = getNrOfSymbols(sched_ctrl->active_bwp,
sched_ctrl->time_domain_allocation);
uint32_t tbs = nr_compute_tbs(nr_get_Qm_dl(sched_ctrl->mcs, sched_ctrl->mcsTableIdx),
nr_get_code_rate_dl(sched_ctrl->mcs, sched_ctrl->mcsTableIdx),
1, // rbSize
nrOfSymbols,
N_PRB_DMRS, // FIXME // This should be multiplied by the
// number of dmrs symbols
0 /* N_PRB_oh, 0 for initialBWP */, 0 /* tb_scaling */,
1 /* nrOfLayers */)
>> 3;
coeff_ue[UE_id] = (float) tbs / thr_ue[UE_id];
LOG_D(MAC,"b %d, thr_ue[%d] %f, tbs %d, coeff_ue[%d] %f\n",
b, UE_id, thr_ue[UE_id], tbs, UE_id, coeff_ue[UE_id]);
/* Create UE_sched list for UEs eligible for new transmission*/
add_tail_nr_list(&UE_sched, UE_id);
}
}
/* Loop UE_sched to find max coeff and allocate transmission */
while (max_num_ue > 0 && n_rb_sched > 0 && UE_sched.head >= 0) {
/* Find max coeff from UE_sched*/
int *max = &UE_sched.head; /* assume head is max */
int *p = &UE_sched.next[*max];
while (*p >= 0) {
/* if the current one has larger coeff, save for later */
if (coeff_ue[*p] > coeff_ue[*max])
max = p;
p = &UE_sched.next[*p];
}
/* remove the max one: do not use remove_nr_list() it goes through the
* whole list every time. Note that UE_sched.tail might not be set
* correctly anymore */
const int UE_id = *max;
p = &UE_sched.next[*max];
*max = UE_sched.next[*max];
*p = -1;
NR_UE_sched_ctrl_t *sched_ctrl = &UE_info->UE_sched_ctrl[UE_id];
const uint16_t rnti = UE_info->rnti[UE_id];
const uint16_t bwpSize = NRRIV2BW(sched_ctrl->active_bwp->bwp_Common->genericParameters.locationAndBandwidth, MAX_BWP_SIZE);
int rbStart = NRRIV2PRBOFFSET(sched_ctrl->active_bwp->bwp_Common->genericParameters.locationAndBandwidth, MAX_BWP_SIZE);
/* Find a free CCE */
bool freeCCE = find_free_CCE(module_id, slot, UE_id);
if (!freeCCE) {
LOG_D(MAC, "%4d.%2d could not find CCE for DL DCI UE %d/RNTI %04x\n", frame, slot, UE_id, rnti);
continue;
}
/* reduce max_num_ue once we are sure UE can be allocated, i.e., has CCE */
max_num_ue--;
if (max_num_ue < 0) return;
/* Find PUCCH occasion: if it fails, undo CCE allocation (undoing PUCCH
* allocation after CCE alloc fail would be more complex) */
const bool alloc = nr_acknack_scheduling(module_id, UE_id, frame, slot);
if (!alloc) {
LOG_W(MAC,
"%s(): could not find PUCCH for UE %d/%04x@%d.%d\n",
__func__,
UE_id,
rnti,
frame,
slot);
int cid = sched_ctrl->coreset->controlResourceSetId;
UE_info->num_pdcch_cand[UE_id][cid]--;
int *cce_list = RC.nrmac[module_id]->cce_list[sched_ctrl->active_bwp->bwp_Id][cid];
for (int i = 0; i < sched_ctrl->aggregation_level; i++)
cce_list[sched_ctrl->cce_index + i] = 0;
return;
}
/* Allocate transmission */
// Time-domain allocation
sched_ctrl->time_domain_allocation = 2;
// modulation scheme
sched_ctrl->mcsTableIdx = 0;
sched_ctrl->mcs = 9;
sched_ctrl->numDmrsCdmGrpsNoData = 1;
// Freq-demain allocation
while (rbStart < bwpSize && !rballoc_mask[rbStart]) rbStart++;
const uint8_t N_PRB_DMRS =
getN_PRB_DMRS(sched_ctrl->active_bwp, sched_ctrl->numDmrsCdmGrpsNoData);
const int nrOfSymbols = getNrOfSymbols(sched_ctrl->active_bwp,
sched_ctrl->time_domain_allocation);
const NR_ServingCellConfigCommon_t *scc = RC.nrmac[module_id]->common_channels->ServingCellConfigCommon;
const uint8_t N_DMRS_SLOT = get_num_dmrs_symbols(
sched_ctrl->active_bwp->bwp_Dedicated->pdsch_Config->choice.setup,
scc->dmrs_TypeA_Position,
nrOfSymbols);
int rbSize = 0;
uint32_t TBS = 0;
const int oh = 2 + (sched_ctrl->num_total_bytes >= 256)
+ 2 * (frame == (sched_ctrl->ta_frame + 10) % 1024);
do {
rbSize++;
TBS = nr_compute_tbs(nr_get_Qm_dl(sched_ctrl->mcs, sched_ctrl->mcsTableIdx),
nr_get_code_rate_dl(sched_ctrl->mcs, sched_ctrl->mcsTableIdx),
rbSize,
nrOfSymbols,
N_PRB_DMRS * N_DMRS_SLOT,
0 /* N_PRB_oh, 0 for initialBWP */,
0 /* tb_scaling */,
1 /* nrOfLayers */)
>> 3;
} while (rbStart + rbSize < bwpSize && rballoc_mask[rbStart + rbSize] && TBS < sched_ctrl->num_total_bytes + oh);
sched_ctrl->rbSize = rbSize;
sched_ctrl->rbStart = rbStart;
/* transmissions: directly allocate */
n_rb_sched -= sched_ctrl->rbSize;
for (int rb = 0; rb < sched_ctrl->rbSize; rb++)
rballoc_mask[rb+sched_ctrl->rbStart] = 0;
}
}
void nr_simple_dlsch_preprocessor(module_id_t module_id,
frame_t frame,
sub_frame_t slot) {
NR_UE_info_t *UE_info = &RC.nrmac[module_id]->UE_info;
if (UE_info->num_UEs == 0)
return;
const int CC_id = 0;
/* Get bwpSize from the first UE */
int UE_id = UE_info->list.head;
NR_UE_sched_ctrl_t *sched_ctrl = &UE_info->UE_sched_ctrl[UE_id];
const uint16_t bwpSize = NRRIV2BW(sched_ctrl->active_bwp->bwp_Common->genericParameters.locationAndBandwidth, MAX_BWP_SIZE);
uint16_t *vrb_map = RC.nrmac[module_id]->common_channels[CC_id].vrb_map;
uint8_t rballoc_mask[bwpSize];
int n_rb_sched = 0;
for (int i = 0; i < bwpSize; i++) {
// calculate mask: init with "NOT" vrb_map:
// if any RB in vrb_map is blocked (1), the current RBG will be 0
rballoc_mask[i] = !vrb_map[i];
n_rb_sched += rballoc_mask[i];
}
/* Retrieve amount of data to send for this UE */
nr_store_dlsch_buffer(module_id, frame, slot);
/* proportional fair scheduling algorithm */
pf_dl(module_id,
frame,
slot,
&UE_info->list,
n_rb_sched,
rballoc_mask,
2);
}
void nr_schedule_ue_spec(module_id_t module_id,
frame_t frame,
sub_frame_t slot) {
gNB_MAC_INST *gNB_mac = RC.nrmac[module_id];
/* PREPROCESSOR */
gNB_mac->pre_processor_dl(module_id, frame, slot);
const int CC_id = 0;
NR_ServingCellConfigCommon_t *scc = gNB_mac->common_channels[CC_id].ServingCellConfigCommon;
NR_UE_info_t *UE_info = &gNB_mac->UE_info;
nfapi_nr_dl_tti_request_body_t *dl_req = &gNB_mac->DL_req[CC_id].dl_tti_request_body;
NR_list_t *UE_list = &UE_info->list;
for (int UE_id = UE_list->head; UE_id >= 0; UE_id = UE_list->next[UE_id]) {
NR_UE_sched_ctrl_t *sched_ctrl = &UE_info->UE_sched_ctrl[UE_id];
UE_info->mac_stats[UE_id].dlsch_current_bytes = 0;
/* update TA and set ta_apply every 10 frames.
* Possible improvement: take the periodicity from input file.
* If such UE is not scheduled now, it will be by the preprocessor later.
* If we add the CE, ta_apply will be reset */
if (frame == (sched_ctrl->ta_frame + 10) % 1024){
sched_ctrl->ta_apply = true; /* the timer is reset once TA CE is scheduled */
LOG_D(MAC, "[UE %d][%d.%d] UL timing alignment procedures: setting flag for Timing Advance command\n", UE_id, frame, slot);
}
if (sched_ctrl->rbSize <= 0)
continue;
const rnti_t rnti = UE_info->rnti[UE_id];
/* POST processing */
struct NR_PDSCH_TimeDomainResourceAllocationList *tdaList =
sched_ctrl->active_bwp->bwp_Common->pdsch_ConfigCommon->choice.setup->pdsch_TimeDomainAllocationList;
AssertFatal(sched_ctrl->time_domain_allocation < tdaList->list.count,
"time_domain_allocation %d>=%d\n",
sched_ctrl->time_domain_allocation,
tdaList->list.count);
const int startSymbolAndLength =
tdaList->list.array[sched_ctrl->time_domain_allocation]->startSymbolAndLength;
int startSymbolIndex, nrOfSymbols;
SLIV2SL(startSymbolAndLength, &startSymbolIndex, &nrOfSymbols);
uint8_t N_PRB_DMRS =
getN_PRB_DMRS(sched_ctrl->active_bwp, sched_ctrl->numDmrsCdmGrpsNoData);
uint8_t N_DMRS_SLOT = get_num_dmrs_symbols(sched_ctrl->active_bwp->bwp_Dedicated->pdsch_Config->choice.setup,
RC.nrmac[module_id]->common_channels->ServingCellConfigCommon->dmrs_TypeA_Position ,
nrOfSymbols);
const nfapi_nr_dmrs_type_e dmrsConfigType = getDmrsConfigType(sched_ctrl->active_bwp);
const int nrOfLayers = 1;
const uint16_t R = nr_get_code_rate_dl(sched_ctrl->mcs, sched_ctrl->mcsTableIdx);
const uint8_t Qm = nr_get_Qm_dl(sched_ctrl->mcs, sched_ctrl->mcsTableIdx);
const uint32_t TBS =
nr_compute_tbs(nr_get_Qm_dl(sched_ctrl->mcs, sched_ctrl->mcsTableIdx),
nr_get_code_rate_dl(sched_ctrl->mcs, sched_ctrl->mcsTableIdx),
sched_ctrl->rbSize,
nrOfSymbols,
N_PRB_DMRS * N_DMRS_SLOT,
0 /* N_PRB_oh, 0 for initialBWP */,
0 /* tb_scaling */,
nrOfLayers)
>> 3;
int8_t current_harq_pid = sched_ctrl->dl_harq_pid;
if (current_harq_pid < 0) {
/* PP has not selected a specific HARQ Process, get a new one */
current_harq_pid = sched_ctrl->available_dl_harq.head;
AssertFatal(current_harq_pid >= 0,
"no free HARQ process available for UE %d\n",
UE_id);
remove_front_nr_list(&sched_ctrl->available_dl_harq);
sched_ctrl->dl_harq_pid = current_harq_pid;
} else {
/* PP selected a specific HARQ process. Check whether it will be a new
* transmission or a retransmission, and remove from the corresponding
* list */
if (sched_ctrl->harq_processes[current_harq_pid].round == 0)
remove_nr_list(&sched_ctrl->available_dl_harq, current_harq_pid);
else
remove_nr_list(&sched_ctrl->retrans_dl_harq, current_harq_pid);
}
NR_UE_harq_t *harq = &sched_ctrl->harq_processes[current_harq_pid];
DevAssert(!harq->is_waiting);
add_tail_nr_list(&sched_ctrl->feedback_dl_harq, current_harq_pid);
NR_sched_pucch_t *pucch = &sched_ctrl->sched_pucch[0];
harq->feedback_slot = pucch->ul_slot;
harq->is_waiting = true;
UE_info->mac_stats[UE_id].dlsch_rounds[harq->round]++;
LOG_D(MAC,
"%4d.%2d RNTI %04x start %d RBs %d startSymbol %d nb_symbsol %d MCS %d TBS %d HARQ PID %d round %d NDI %d\n",
frame,
slot,
rnti,
sched_ctrl->rbStart,
sched_ctrl->rbSize,
startSymbolIndex,
nrOfSymbols,
sched_ctrl->mcs,
TBS,
current_harq_pid,
harq->round,
harq->ndi);
NR_BWP_Downlink_t *bwp = sched_ctrl->active_bwp;
AssertFatal(bwp->bwp_Dedicated->pdcch_Config->choice.setup->searchSpacesToAddModList,
"searchSpacesToAddModList is null\n");
AssertFatal(bwp->bwp_Dedicated->pdcch_Config->choice.setup->searchSpacesToAddModList->list.count > 0,
"searchSPacesToAddModList is empty\n");
/* look up the PDCCH PDU for this CC, BWP, and CORESET. If it does not
* exist, create it */
const int bwpid = sched_ctrl->active_bwp->bwp_Id;
const int coresetid = sched_ctrl->coreset->controlResourceSetId;
nfapi_nr_dl_tti_pdcch_pdu_rel15_t *pdcch_pdu = gNB_mac->pdcch_pdu_idx[CC_id][bwpid][coresetid];
if (!pdcch_pdu) {
nfapi_nr_dl_tti_request_pdu_t *dl_tti_pdcch_pdu = &dl_req->dl_tti_pdu_list[dl_req->nPDUs];
memset(dl_tti_pdcch_pdu, 0, sizeof(nfapi_nr_dl_tti_request_pdu_t));
dl_tti_pdcch_pdu->PDUType = NFAPI_NR_DL_TTI_PDCCH_PDU_TYPE;
dl_tti_pdcch_pdu->PDUSize = (uint8_t)(2+sizeof(nfapi_nr_dl_tti_pdcch_pdu));
dl_req->nPDUs += 1;
pdcch_pdu = &dl_tti_pdcch_pdu->pdcch_pdu.pdcch_pdu_rel15;
nr_configure_pdcch(pdcch_pdu, sched_ctrl->search_space, sched_ctrl->coreset, scc, bwp);
gNB_mac->pdcch_pdu_idx[CC_id][bwpid][coresetid] = pdcch_pdu;
}
nfapi_nr_dl_tti_request_pdu_t *dl_tti_pdsch_pdu = &dl_req->dl_tti_pdu_list[dl_req->nPDUs];
memset(dl_tti_pdsch_pdu, 0, sizeof(nfapi_nr_dl_tti_request_pdu_t));
dl_tti_pdsch_pdu->PDUType = NFAPI_NR_DL_TTI_PDSCH_PDU_TYPE;
dl_tti_pdsch_pdu->PDUSize = (uint8_t)(2+sizeof(nfapi_nr_dl_tti_pdsch_pdu));
dl_req->nPDUs += 1;
nfapi_nr_dl_tti_pdsch_pdu_rel15_t *pdsch_pdu = &dl_tti_pdsch_pdu->pdsch_pdu.pdsch_pdu_rel15;
pdsch_pdu->pduBitmap = 0;
pdsch_pdu->rnti = rnti;
/* SCF222: PDU index incremented for each PDSCH PDU sent in TX control
* message. This is used to associate control information to data and is
* reset every slot. */
const int pduindex = gNB_mac->pdu_index[CC_id]++;
pdsch_pdu->pduIndex = pduindex;
// BWP
pdsch_pdu->BWPSize = NRRIV2BW(bwp->bwp_Common->genericParameters.locationAndBandwidth, MAX_BWP_SIZE);
pdsch_pdu->BWPStart = NRRIV2PRBOFFSET(bwp->bwp_Common->genericParameters.locationAndBandwidth,MAX_BWP_SIZE);
pdsch_pdu->SubcarrierSpacing = bwp->bwp_Common->genericParameters.subcarrierSpacing;
if (bwp->bwp_Common->genericParameters.cyclicPrefix)
pdsch_pdu->CyclicPrefix = *bwp->bwp_Common->genericParameters.cyclicPrefix;
else
pdsch_pdu->CyclicPrefix = 0;
// Codeword information
pdsch_pdu->NrOfCodewords = 1;
pdsch_pdu->targetCodeRate[0] = R;
pdsch_pdu->qamModOrder[0] = Qm;
pdsch_pdu->mcsIndex[0] = sched_ctrl->mcs;
pdsch_pdu->mcsTable[0] = sched_ctrl->mcsTableIdx;
pdsch_pdu->rvIndex[0] = nr_rv_round_map[harq->round];
pdsch_pdu->TBSize[0] = TBS;
pdsch_pdu->dataScramblingId = *scc->physCellId;
pdsch_pdu->nrOfLayers = nrOfLayers;
pdsch_pdu->transmissionScheme = 0;
pdsch_pdu->refPoint = 0; // Point A
// DMRS
pdsch_pdu->dlDmrsSymbPos =
fill_dmrs_mask(bwp->bwp_Dedicated->pdsch_Config->choice.setup,
scc->dmrs_TypeA_Position,
nrOfSymbols);
pdsch_pdu->dmrsConfigType = dmrsConfigType;
pdsch_pdu->dlDmrsScramblingId = *scc->physCellId;
pdsch_pdu->SCID = 0;
pdsch_pdu->numDmrsCdmGrpsNoData = sched_ctrl->numDmrsCdmGrpsNoData;
pdsch_pdu->dmrsPorts = 1;
// Pdsch Allocation in frequency domain
pdsch_pdu->resourceAlloc = 1;
pdsch_pdu->rbStart = sched_ctrl->rbStart;
pdsch_pdu->rbSize = sched_ctrl->rbSize;
pdsch_pdu->VRBtoPRBMapping = 1; // non-interleaved, check if this is ok for initialBWP
// Resource Allocation in time domain
pdsch_pdu->StartSymbolIndex = startSymbolIndex;
pdsch_pdu->NrOfSymbols = nrOfSymbols;
/* Check and validate PTRS values */
struct NR_SetupRelease_PTRS_DownlinkConfig *phaseTrackingRS =
bwp->bwp_Dedicated->pdsch_Config->choice.setup->dmrs_DownlinkForPDSCH_MappingTypeA->choice.setup->phaseTrackingRS;
if (phaseTrackingRS) {
bool valid_ptrs_setup = set_dl_ptrs_values(phaseTrackingRS->choice.setup,
pdsch_pdu->rbSize,
pdsch_pdu->mcsIndex[0],
pdsch_pdu->mcsTable[0],
&pdsch_pdu->PTRSFreqDensity,
&pdsch_pdu->PTRSTimeDensity,
&pdsch_pdu->PTRSPortIndex,
&pdsch_pdu->nEpreRatioOfPDSCHToPTRS,
&pdsch_pdu->PTRSReOffset,
pdsch_pdu->NrOfSymbols);
if (valid_ptrs_setup)
pdsch_pdu->pduBitmap |= 0x1; // Bit 0: pdschPtrs - Indicates PTRS included (FR2)
}
/* Fill PDCCH DL DCI PDU */
nfapi_nr_dl_dci_pdu_t *dci_pdu = &pdcch_pdu->dci_pdu[pdcch_pdu->numDlDci];
pdcch_pdu->numDlDci++;
dci_pdu->RNTI = rnti;
if (sched_ctrl->coreset->pdcch_DMRS_ScramblingID &&
sched_ctrl->search_space->searchSpaceType->present == NR_SearchSpace__searchSpaceType_PR_ue_Specific) {
dci_pdu->ScramblingId = *sched_ctrl->coreset->pdcch_DMRS_ScramblingID;
dci_pdu->ScramblingRNTI = rnti;
} else {
dci_pdu->ScramblingId = *scc->physCellId;
dci_pdu->ScramblingRNTI = 0;
}
dci_pdu->AggregationLevel = sched_ctrl->aggregation_level;
dci_pdu->CceIndex = sched_ctrl->cce_index;
dci_pdu->beta_PDCCH_1_0 = 0;
dci_pdu->powerControlOffsetSS = 1;
/* DCI payload */
dci_pdu_rel15_t dci_payload;
memset(&dci_payload, 0, sizeof(dci_pdu_rel15_t));
// bwp indicator
const int n_dl_bwp = UE_info->secondaryCellGroup[UE_id]->spCellConfig->spCellConfigDedicated->downlinkBWP_ToAddModList->list.count;
AssertFatal(n_dl_bwp == 1,
"downlinkBWP_ToAddModList has %d BWP!\n",
n_dl_bwp);
// as per table 7.3.1.1.2-1 in 38.212
dci_payload.bwp_indicator.val = n_dl_bwp < 4 ? bwp->bwp_Id : bwp->bwp_Id - 1;
AssertFatal(bwp->bwp_Dedicated->pdsch_Config->choice.setup->resourceAllocation == NR_PDSCH_Config__resourceAllocation_resourceAllocationType1,
"Only frequency resource allocation type 1 is currently supported\n");
dci_payload.frequency_domain_assignment.val =
PRBalloc_to_locationandbandwidth0(
pdsch_pdu->rbSize,
pdsch_pdu->rbStart,
pdsch_pdu->BWPSize);
dci_payload.time_domain_assignment.val = sched_ctrl->time_domain_allocation;
dci_payload.mcs = sched_ctrl->mcs;
dci_payload.rv = pdsch_pdu->rvIndex[0];
dci_payload.harq_pid = current_harq_pid;
dci_payload.ndi = harq->ndi;
dci_payload.dai[0].val = (pucch->dai_c-1)&3;
dci_payload.tpc = sched_ctrl->tpc1; // TPC for PUCCH: table 7.2.1-1 in 38.213
dci_payload.pucch_resource_indicator = pucch->resource_indicator;
dci_payload.pdsch_to_harq_feedback_timing_indicator.val = pucch->timing_indicator; // PDSCH to HARQ TI
dci_payload.antenna_ports.val = 0; // nb of cdm groups w/o data 1 and dmrs port 0
dci_payload.dmrs_sequence_initialization.val = pdsch_pdu->SCID;
LOG_D(MAC,
"%4d.%2d DCI type 1 payload: freq_alloc %d (%d,%d,%d), "
"time_alloc %d, vrb to prb %d, mcs %d tb_scaling %d ndi %d rv %d\n",
frame,
slot,
dci_payload.frequency_domain_assignment.val,
pdsch_pdu->rbStart,
pdsch_pdu->rbSize,
pdsch_pdu->BWPSize,
dci_payload.time_domain_assignment.val,
dci_payload.vrb_to_prb_mapping.val,
dci_payload.mcs,
dci_payload.tb_scaling,
dci_payload.ndi,
dci_payload.rv);
const long f = sched_ctrl->search_space->searchSpaceType->choice.ue_Specific->dci_Formats;
const int dci_format = f ? NR_DL_DCI_FORMAT_1_1 : NR_DL_DCI_FORMAT_1_0;
const int rnti_type = NR_RNTI_C;
fill_dci_pdu_rel15(scc,
UE_info->secondaryCellGroup[UE_id],
dci_pdu,
&dci_payload,
dci_format,
rnti_type,
pdsch_pdu->BWPSize,
bwp->bwp_Id);
LOG_D(MAC,
"coreset params: FreqDomainResource %llx, start_symbol %d n_symb %d\n",
(unsigned long long)pdcch_pdu->FreqDomainResource,
pdcch_pdu->StartSymbolIndex,
pdcch_pdu->DurationSymbols);
NR_UE_ret_info_t *retInfo = &sched_ctrl->retInfo[current_harq_pid];
if (harq->round != 0) { /* retransmission */
if (sched_ctrl->rbSize != retInfo->rbSize)
LOG_W(MAC,
"retransmission uses different rbSize (%d vs. orig %d)\n",
sched_ctrl->rbSize,
retInfo->rbSize);
if (sched_ctrl->time_domain_allocation != retInfo->time_domain_allocation)
LOG_W(MAC,
"retransmission uses different time_domain_allocation (%d vs. orig %d)\n",
sched_ctrl->time_domain_allocation,
retInfo->time_domain_allocation);
if (sched_ctrl->mcs != retInfo->mcs
|| sched_ctrl->mcsTableIdx != retInfo->mcsTableIdx
|| sched_ctrl->numDmrsCdmGrpsNoData != retInfo->numDmrsCdmGrpsNoData)
LOG_W(MAC,
"retransmission uses different table/MCS/numDmrsCdmGrpsNoData (%d/%d/%d vs. orig %d/%d/%d)\n",
sched_ctrl->mcsTableIdx,
sched_ctrl->mcs,
sched_ctrl->numDmrsCdmGrpsNoData,
retInfo->mcsTableIdx,
retInfo->mcs,
retInfo->numDmrsCdmGrpsNoData);
/* we do not have to do anything, since we do not require to get data
* from RLC or encode MAC CEs. The TX_req structure is filled below
* or copy data to FAPI structures */
LOG_D(MAC,
"%d.%2d DL retransmission UE %d/RNTI %04x HARQ PID %d round %d NDI %d\n",
frame,
slot,
UE_id,
rnti,
current_harq_pid,
harq->round,
harq->ndi);
AssertFatal(harq->tb_size == TBS,
"UE %d mismatch between scheduled TBS and buffered TB for HARQ PID %d\n",
UE_id,
current_harq_pid);
} else { /* initial transmission */
LOG_D(MAC, "[%s] Initial HARQ transmission in %d.%d\n", __FUNCTION__, frame, slot);
harq->tb_size = TBS;
uint8_t *buf = (uint8_t *) harq->tb;
/* first, write all CEs that might be there */
int written = nr_write_ce_dlsch_pdu(module_id,
sched_ctrl,
(unsigned char *)buf,
255, // no drx
NULL); // contention res id
buf += written;
int size = TBS - written;
DevAssert(size >= 0);
/* next, get RLC data */
const int lcid = DL_SCH_LCID_DTCH;
int dlsch_total_bytes = 0;
if (sched_ctrl->num_total_bytes > 0) {
tbs_size_t len = 0;
while (size > 3) {
// we do not know how much data we will get from RLC, i.e., whether it
// will be longer than 256B or not. Therefore, reserve space for long header, then
// fetch data, then fill real length
NR_MAC_SUBHEADER_LONG *header = (NR_MAC_SUBHEADER_LONG *) buf;
buf += 3;
size -= 3;
/* limit requested number of bytes to what preprocessor specified, or
* such that TBS is full */
const rlc_buffer_occupancy_t ndata = min(sched_ctrl->rlc_status[lcid].bytes_in_buffer, size);
len = mac_rlc_data_req(module_id,
rnti,
module_id,
frame,
ENB_FLAG_YES,
MBMS_FLAG_NO,
lcid,
ndata,
(char *)buf,
0,
0);
LOG_D(MAC,
"%4d.%2d RNTI %04x: %d bytes from DTCH %d (ndata %d, remaining size %d)\n",
frame,
slot,
rnti,
len,
lcid,
ndata,
size);
if (len == 0)
break;
header->R = 0;
header->F = 1;
header->LCID = lcid;
header->L1 = (len >> 8) & 0xff;
header->L2 = len & 0xff;
size -= len;
buf += len;
dlsch_total_bytes += len;
}
if (len == 0) {
/* RLC did not have data anymore, mark buffer as unused */
buf -= 3;
size += 3;
}
}
else if (get_softmodem_params()->phy_test || get_softmodem_params()->do_ra) {
/* we will need the large header, phy-test typically allocates all
* resources and fills to the last byte below */
NR_MAC_SUBHEADER_LONG *header = (NR_MAC_SUBHEADER_LONG *) buf;
buf += 3;
size -= 3;
DevAssert(size > 0);
LOG_D(MAC, "Configuring DL_TX in %d.%d: TBS %d with %d B of random data\n", frame, slot, TBS, size);
// fill dlsch_buffer with random data
for (int i = 0; i < size; i++)
buf[i] = lrand48() & 0xff;
header->R = 0;
header->F = 1;
header->LCID = DL_SCH_LCID_PADDING;
header->L1 = (size >> 8) & 0xff;
header->L2 = size & 0xff;
size -= size;
buf += size;
dlsch_total_bytes += size;
}
// Add padding header and zero rest out if there is space left
if (size > 0) {
NR_MAC_SUBHEADER_FIXED *padding = (NR_MAC_SUBHEADER_FIXED *) buf;
padding->R = 0;
padding->LCID = DL_SCH_LCID_PADDING;
size -= 1;
buf += 1;
while (size > 0) {
*buf = 0;
buf += 1;
size -= 1;
}
}
UE_info->mac_stats[UE_id].dlsch_total_bytes += TBS;
UE_info->mac_stats[UE_id].dlsch_current_bytes = TBS;
UE_info->mac_stats[UE_id].lc_bytes_tx[lcid] += dlsch_total_bytes;
retInfo->rbSize = sched_ctrl->rbSize;
retInfo->time_domain_allocation = sched_ctrl->time_domain_allocation;
retInfo->mcsTableIdx = sched_ctrl->mcsTableIdx;
retInfo->mcs = sched_ctrl->mcs;
retInfo->numDmrsCdmGrpsNoData = sched_ctrl->numDmrsCdmGrpsNoData;
// ta command is sent, values are reset
if (sched_ctrl->ta_apply) {
sched_ctrl->ta_apply = false;
sched_ctrl->ta_frame = frame;
LOG_D(MAC,
"%d.%2d UE %d TA scheduled, resetting TA frame\n",
frame,
slot,
UE_id);
}
T(T_GNB_MAC_DL_PDU_WITH_DATA, T_INT(module_id), T_INT(CC_id), T_INT(rnti),
T_INT(frame), T_INT(slot), T_INT(current_harq_pid), T_BUFFER(harq->tb, TBS));
}
const int ntx_req = gNB_mac->TX_req[CC_id].Number_of_PDUs;
nfapi_nr_pdu_t *tx_req = &gNB_mac->TX_req[CC_id].pdu_list[ntx_req];
tx_req->PDU_length = TBS;
tx_req->PDU_index = pduindex;
tx_req->num_TLV = 1;
tx_req->TLVs[0].length = TBS + 2;
memcpy(tx_req->TLVs[0].value.direct, harq->tb, TBS);
gNB_mac->TX_req[CC_id].Number_of_PDUs++;
gNB_mac->TX_req[CC_id].SFN = frame;
gNB_mac->TX_req[CC_id].Slot = slot;
/* mark UE as scheduled */
sched_ctrl->rbSize = 0;
}
}
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