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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/MAC/mac.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 *)
int nr_generate_dlsch_pdu(module_id_t module_idP,
NR_UE_sched_ctrl_t *ue_sched_ctl,
unsigned char *sdus_payload,
unsigned char *mac_pdu,
unsigned char num_sdus,
unsigned short *sdu_lengths,
unsigned char *sdu_lcids,
unsigned char drx_cmd,
unsigned char *ue_cont_res_id,
unsigned short post_padding) {
gNB_MAC_INST *gNB = RC.nrmac[module_idP];
NR_MAC_SUBHEADER_FIXED *mac_pdu_ptr = (NR_MAC_SUBHEADER_FIXED *) mac_pdu;
unsigned char *dlsch_buffer_ptr = sdus_payload;
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];
// 1) Compute MAC CE and related subheaders
// 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;
}
}
}
// 2) Generation of DLSCH MAC subPDUs including subheaders and MAC SDUs
for (i = 0; i < num_sdus; i++) {
if (sdu_lengths[i] < 256) {
((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 = sdu_lcids[i];
((NR_MAC_SUBHEADER_SHORT *) mac_pdu_ptr)->L = (unsigned char) sdu_lengths[i];
last_size = 2;
} else {
((NR_MAC_SUBHEADER_LONG *) mac_pdu_ptr)->R = 0;
((NR_MAC_SUBHEADER_LONG *) mac_pdu_ptr)->F = 1;
((NR_MAC_SUBHEADER_LONG *) mac_pdu_ptr)->LCID = sdu_lcids[i];
((NR_MAC_SUBHEADER_LONG *) mac_pdu_ptr)->L1 = ((unsigned short) sdu_lengths[i] >> 8) & 0xff;
((NR_MAC_SUBHEADER_LONG *) mac_pdu_ptr)->L2 = (unsigned short) sdu_lengths[i] & 0xff;
last_size = 3;
}
mac_pdu_ptr += last_size;
// 3) cycle through SDUs, compute each relevant and place dlsch_buffer in
memcpy((void *) mac_pdu_ptr, (void *) dlsch_buffer_ptr, sdu_lengths[i]);
dlsch_buffer_ptr += sdu_lengths[i];
mac_pdu_ptr += sdu_lengths[i];
LOG_D(MAC, "Generate DLSCH header num sdu %d len header %d len sdu %d -> offset %ld\n", num_sdus, last_size, sdu_lengths[i], (unsigned char *)mac_pdu_ptr - mac_pdu);
}
// 4) Compute final offset for padding
if (post_padding > 0) {
((NR_MAC_SUBHEADER_FIXED *) mac_pdu_ptr)->R = 0;
((NR_MAC_SUBHEADER_FIXED *) mac_pdu_ptr)->LCID = DL_SCH_LCID_PADDING;
mac_pdu_ptr++;
LOG_D(MAC, "Generate Padding -> offset %ld\n", (unsigned char *)mac_pdu_ptr - mac_pdu);
} else {
// no MAC subPDU with padding
}
// 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_simple_dlsch_preprocessor(module_id_t module_id,
frame_t frame,
sub_frame_t slot,
int num_slots_per_tdd) {
NR_UE_info_t *UE_info = &RC.nrmac[module_id]->UE_info;
AssertFatal(UE_info->num_UEs <= 1,
"%s() cannot handle more than one UE, but found %d\n",
__func__,
UE_info->num_UEs);
if (UE_info->num_UEs == 0)
return;
const int UE_id = 0;
const int CC_id = 0;
NR_UE_sched_ctrl_t *sched_ctrl = &UE_info->UE_sched_ctrl[UE_id];
/* Retrieve amount of data to send for this UE */
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;
if (sched_ctrl->num_total_bytes == 0
&& !sched_ctrl->ta_apply) /* If TA should be applied, give at least one RB */
return;
LOG_D(MAC,
"%d.%d, DTCH%d->DLSCH, RLC status %d bytes TA %d\n",
frame,
slot,
lcid,
sched_ctrl->rlc_status[lcid].bytes_in_buffer,
sched_ctrl->ta_apply);
/* Find a free CCE */
const int target_ss = NR_SearchSpace__searchSpaceType_PR_ue_Specific;
sched_ctrl->search_space = get_searchspace(sched_ctrl->active_bwp, target_ss);
uint8_t nr_of_candidates;
find_aggregation_candidates(&sched_ctrl->aggregation_level,
&nr_of_candidates,
sched_ctrl->search_space);
sched_ctrl->coreset = get_coreset(
sched_ctrl->active_bwp, sched_ctrl->search_space, 1 /* dedicated */);
int cid = sched_ctrl->coreset->controlResourceSetId;
const uint16_t Y = UE_info->Y[UE_id][cid][slot];
const int m = UE_info->num_pdcch_cand[UE_id][cid];
sched_ctrl->cce_index = allocate_nr_CCEs(RC.nrmac[module_id],
sched_ctrl->active_bwp,
sched_ctrl->coreset,
sched_ctrl->aggregation_level,
Y,
m,
nr_of_candidates);
if (sched_ctrl->cce_index < 0) {
LOG_E(MAC, "%s(): could not find CCE for UE %d\n", __func__, UE_id);
return;
}
UE_info->num_pdcch_cand[UE_id][cid]++;
/* Find PUCCH occasion */
nr_acknack_scheduling(module_id,
UE_id,
frame,
slot,
num_slots_per_tdd,
&sched_ctrl->pucch_sched_idx,
&sched_ctrl->pucch_occ_idx);
AssertFatal(sched_ctrl->pucch_sched_idx >= 0, "no uplink slot for PUCCH found!\n");
uint16_t *vrb_map = RC.nrmac[module_id]->common_channels[CC_id].vrb_map;
const int current_harq_pid = sched_ctrl->current_harq_pid;
NR_UE_harq_t *harq = &sched_ctrl->harq_processes[current_harq_pid];
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, 275);
int rbStart = NRRIV2PRBOFFSET(sched_ctrl->active_bwp->bwp_Common->genericParameters.locationAndBandwidth, 275);
if (harq->round != 0) { /* retransmission */
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 && vrb_map[rbStart]) rbStart++;
if (rbStart >= bwpSize) {
LOG_E(MAC,
"cannot allocate retransmission for UE %d/RNTI %04x: no resources\n",
UE_id,
rnti);
return;
}
while (rbStart + rbSize < bwpSize
&& !vrb_map[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;
} else {
// 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 && vrb_map[rbStart]) rbStart++;
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);
int rbSize = 0;
const int oh = 2 + (sched_ctrl->num_total_bytes >= 256)
+ 2 * (frame == (sched_ctrl->ta_frame + 10) % 1024);
uint32_t TBS = 0;
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, // FIXME // This should be multiplied by the
// number of dmrs symbols
0 /* N_PRB_oh, 0 for initialBWP */,
0 /* tb_scaling */,
1 /* nrOfLayers */)
>> 3;
} while (rbStart + rbSize < bwpSize && !vrb_map[rbStart + rbSize] && TBS < sched_ctrl->num_total_bytes + oh);
sched_ctrl->rbSize = rbSize;
sched_ctrl->rbStart = rbStart;
}
/* mark the corresponding RBs as used */
for (int rb = 0; rb < sched_ctrl->rbSize; rb++)
vrb_map[rb + sched_ctrl->rbStart] = 1;
}
void nr_schedule_ue_spec(module_id_t module_id,
frame_t frame,
sub_frame_t slot,
int num_slots_per_tdd) {
gNB_MAC_INST *gNB_mac = RC.nrmac[module_id];
/* PREPROCESSOR */
gNB_mac->pre_processor_dl(module_id, frame, slot, num_slots_per_tdd);
NR_UE_info_t *UE_info = &gNB_mac->UE_info;
const int CC_id = 0;
NR_UE_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];
/* 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 */
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);
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, // FIXME // This should be multiplied by the
// number of dmrs symbols
0 /* N_PRB_oh, 0 for initialBWP */,
0 /* tb_scaling */,
1 /* nrOfLayers */)
>> 3;
const int current_harq_pid = sched_ctrl->current_harq_pid;
NR_UE_harq_t *harq = &sched_ctrl->harq_processes[current_harq_pid];
NR_sched_pucch *pucch = &sched_ctrl->sched_pucch[sched_ctrl->pucch_sched_idx][sched_ctrl->pucch_occ_idx];
harq->feedback_slot = pucch->ul_slot;
harq->is_waiting = 1;
UE_info->mac_stats[UE_id].dlsch_rounds[harq->round]++;
LOG_D(MAC, "%4d.%2d RNTI %04x start %d RBS %d MCS %d TBS %d HARQ PID %d round %d NDI %d\n",
frame, slot, rnti, sched_ctrl->rbStart, sched_ctrl->rbSize, sched_ctrl->mcs,
TBS, current_harq_pid, harq->round, harq->ndi);
nfapi_nr_dl_tti_request_body_t *dl_req = &gNB_mac->DL_req[CC_id].dl_tti_request_body;
nr_fill_nfapi_dl_pdu(module_id,
dl_req,
rnti,
UE_info->secondaryCellGroup[UE_id],
sched_ctrl,
pucch,
getDmrsConfigType(sched_ctrl->active_bwp),
nr_get_code_rate_dl(sched_ctrl->mcs, sched_ctrl->mcsTableIdx),
nr_get_Qm_dl(sched_ctrl->mcs, sched_ctrl->mcsTableIdx),
TBS,
startSymbolIndex,
nrOfSymbols,
current_harq_pid,
harq->ndi,
harq->round);
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, encode MAC CEs, or copy data to FAPI structures */
LOG_W(MAC, "%d.%2d retransmission UE %d/RNTI %04x\n", frame, slot, UE_id, rnti);
} else { /* initial transmission */
/* reserve space for timing advance of UE if necessary,
* nr_generate_dlsch_pdu() checks for ta_apply and add TA CE if necessary */
const int ta_len = (sched_ctrl->ta_apply) ? 2 : 0;
/* Get RLC data */
int header_length_total = 0;
int header_length_last = 0;
int sdu_length_total = 0;
int num_sdus = 0;
uint16_t sdu_lengths[NB_RB_MAX] = {0};
uint8_t mac_sdus[MAX_NR_DLSCH_PAYLOAD_BYTES];
unsigned char sdu_lcids[NB_RB_MAX] = {0};
const int lcid = DL_SCH_LCID_DTCH;
if (sched_ctrl->num_total_bytes > 0) {
/* this is the data from the RLC we would like to request (e.g., only
* some bytes for first LC and some more from a second one */
const rlc_buffer_occupancy_t ndata = sched_ctrl->rlc_status[lcid].bytes_in_buffer;
/* this is the maximum data we can transport based on TBS minus headers */
const int mindata = min(ndata, TBS - ta_len - header_length_total - sdu_length_total - 2 - (ndata >= 256));
LOG_D(MAC,
"[gNB %d][USER-PLANE DEFAULT DRB] Frame %d : DTCH->DLSCH, Requesting "
"%d bytes from RLC (lcid %d total hdr len %d), TBS: %d \n \n",
module_id,
frame,
mindata,
lcid,
header_length_total,
TBS);
sdu_lengths[num_sdus] = mac_rlc_data_req(module_id,
rnti,
module_id,
frame,
ENB_FLAG_YES,
MBMS_FLAG_NO,
lcid,
mindata,
(char *)&mac_sdus[sdu_length_total],
0,
0);
LOG_D(MAC,
"[gNB %d][USER-PLANE DEFAULT DRB] Got %d bytes for DTCH %d \n",
module_id,
sdu_lengths[num_sdus],
lcid);
sdu_lcids[num_sdus] = lcid;
sdu_length_total += sdu_lengths[num_sdus];
header_length_last = 1 + 1 + (sdu_lengths[num_sdus] >= 128);
header_length_total += header_length_last;
num_sdus++;
}
else if (get_softmodem_params()->phy_test) {
LOG_D(MAC, "Configuring DL_TX in %d.%d: random data\n", frame, slot);
// fill dlsch_buffer with random data
for (int i = 0; i < TBS; i++)
mac_sdus[i] = (unsigned char) (lrand48()&0xff);
sdu_lcids[0] = 0x3f; // DRB
sdu_lengths[0] = TBS - ta_len - 3;
header_length_total += 2 + (sdu_lengths[0] >= 256);
sdu_length_total += sdu_lengths[0];
num_sdus +=1;
}
UE_info->mac_stats[UE_id].dlsch_total_bytes += TBS;
UE_info->mac_stats[UE_id].lc_bytes_tx[lcid] += sdu_length_total;
const int post_padding = TBS > header_length_total + sdu_length_total + ta_len;
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];
/* pointer to directly generate the PDU into the nFAPI structure */
uint32_t *buf = tx_req->TLVs[0].value.direct;
const int offset = nr_generate_dlsch_pdu(
module_id,
sched_ctrl,
(unsigned char *)mac_sdus,
(unsigned char *)buf,
num_sdus, // num_sdus
sdu_lengths,
sdu_lcids,
255, // no drx
NULL, // contention res id
post_padding);
// Padding: fill remainder of DLSCH with 0
if (post_padding > 0) {
for (int j = 0; j < TBS - offset; j++)
buf[offset + j] = 0;
}
/* the buffer has been filled by nr_generate_dlsch_pdu(), below we simply
* fill the remaining information */
tx_req->PDU_length = TBS;
tx_req->PDU_index = gNB_mac->pdu_index[0]++;
tx_req->num_TLV = 1;
tx_req->TLVs[0].length = TBS + 2;
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;
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(buf, TBS));
#if defined(ENABLE_MAC_PAYLOAD_DEBUG)
if (frame%100 == 0) {
LOG_I(MAC,
"%d.%d, first 10 payload bytes, TBS size: %d \n",
frame,
slot,
TBS);
for(int i = 0; i < 10; i++)
LOG_I(MAC, "byte %d: %x\n", i, ((uint8_t *) buf)[i]);
}
#endif
}
/* mark UE as scheduled */
sched_ctrl->rbSize = 0;
}
}
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