Skip to content

O
OpenXG-RAN
Commit e054b5e2 authored by cig's avatar cig
Browse files
Options

RA Msg2 reception according to 8.2 of TS 38.213 

- Msg2 scheduler used for testing purposes was removed
- Now the UE tries to DCI 1_0 scrambled with RA_RNTI in the RA window
- If no RAPID is found within the RA window, instructs PHY to TX PRACH
parent 6737d273
Hide whitespace changes
Inline Side-by-side
Showing with 22 additions and 131 deletions
openair2/LAYER2/NR_MAC_UE/mac_defs.h
View file @ e054b5e2
......@@ -222,11 +222,6 @@ typedef struct {
uint32_t RA_tx_frame;
/// Random-access variable for window calculation (subframe of last change in window counter)
uint8_t RA_tx_subframe;
/// Scheduled RX frame for RA Msg2
uint16_t msg2_rx_frame;
/// Scheduled RX slot for RA Msg2
uint16_t msg2_rx_slot;
/// Random-access Group B maximum path-loss
/// Random-access variable for backoff (frame of last change in backoff counter)
uint32_t RA_backoff_frame;
/// Random-access variable for backoff (subframe of last change in backoff counter)
......
openair2/LAYER2/NR_MAC_UE/nr_ra_procedures.c
View file @ e054b5e2
......@@ -363,7 +363,7 @@ uint8_t nr_ue_get_rach(NR_PRACH_RESOURCES_t *prach_resources,
AssertFatal(CC_id == 0,"Transmission on secondary CCs is not supported yet\n");
if (UE_mode == PRACH && prach_resources->init_msg1) {
if (UE_mode < PUSCH && prach_resources->init_msg1) {
LOG_D(MAC, "nr_ue_get_rach, RA_active value: %d", mac->RA_active);
......@@ -470,7 +470,7 @@ uint8_t nr_ue_get_rach(NR_PRACH_RESOURCES_t *prach_resources,
payload[offset + j] = 0; // mac_pdu[offset + j] = 0;
}
}
} else { // RACH is active
} else if (mac->RA_window_cnt != -1) { // RACH is active
////////////////////////////////////////////////////////////////
/////* Random Access Response reception (5.1.4 TS 38.321) */////
......@@ -481,7 +481,6 @@ uint8_t nr_ue_get_rach(NR_PRACH_RESOURCES_t *prach_resources,
// - handle beam failure recovery request
// - handle DL assignment on PDCCH for RA-RNTI
// - handle backoff and raResponseWindow params
// - disabled contention resolution as OAI NSA is contention-free based
// LOG_D(MAC, "[MAC][UE %d][RAPROC] frame %d, subframe %d: RA Active, window cnt %d (RA_tx_frame %d, RA_tx_subframe %d)\n",
// mod_id, frame, nr_tti_tx, mac->RA_window_cnt, mac->RA_tx_frame, mac->RA_tx_subframe);
......@@ -494,12 +493,13 @@ uint8_t nr_ue_get_rach(NR_PRACH_RESOURCES_t *prach_resources,
if (mac->RA_window_cnt >= 0 && mac->RA_RAPID_found == 1) {
// mac->ra_state = WAIT_CONTENTION_RESOLUTION;
LOG_I(MAC, "[MAC][UE %d][RAPROC] Frame %d: subframe %d: RAR successfully received \n", mod_id, frame, nr_tti_tx);
mac->ra_state = WAIT_CONTENTION_RESOLUTION;
mac->RA_window_cnt = -1;
LOG_I(MAC, "[MAC][UE %d][RAPROC] Frame %d: nr_tti_tx %d: RAR successfully received \n", mod_id, frame, nr_tti_tx);
} else if (mac->RA_window_cnt == 0 && !mac->RA_RAPID_found) {
LOG_I(MAC, "[MAC][UE %d][RAPROC] Frame %d: subframe %d: RAR reception failed \n", mod_id, frame, nr_tti_tx);
LOG_I(MAC, "[MAC][UE %d][RAPROC] Frame %d: nr_tti_tx %d: RAR reception failed \n", mod_id, frame, nr_tti_tx);
mac->ra_state = RA_UE_IDLE;
mac->RA_PREAMBLE_TRANSMISSION_COUNTER++;
......@@ -578,7 +578,7 @@ uint8_t nr_ue_get_rach(NR_PRACH_RESOURCES_t *prach_resources,
mac->RA_window_cnt--;
LOG_I(MAC, "[MAC][UE %d][RAPROC] Frame %d: subframe %d: RAR reception not successful, (RA window count %d) \n",
LOG_I(MAC, "[MAC][UE %d][RAPROC] Frame %d: nr_tti_tx %d: RAR reception not successful, (RA window count %d) \n",
mod_id,
frame,
nr_tti_tx,
......
openair2/LAYER2/NR_MAC_UE/nr_ue_dci_configuration.c
View file @ e054b5e2
......@@ -213,23 +213,23 @@ void ue_dci_configuration(NR_UE_MAC_INST_t *mac, fapi_nr_dl_config_request_t *dl
AssertFatal(css->monitoringSymbolsWithinSlot->buf != NULL, "css->monitoringSymbolsWithinSlot->buf is null\n");
}
if (frame == mac->msg2_rx_frame && slot == mac->msg2_rx_slot){
sps = initialDownlinkBWP->genericParameters.cyclicPrefix == NULL ? 14 : 12;
monitoringSymbolsWithinSlot = (css->monitoringSymbolsWithinSlot->buf[0]<<(sps-8)) | (css->monitoringSymbolsWithinSlot->buf[1]>>(16-sps));
rel15->rnti = mac->ra_rnti;
rel15->BWPSize = NRRIV2BW(initialDownlinkBWP->genericParameters.locationAndBandwidth, 275);
rel15->BWPStart = NRRIV2PRBOFFSET(bwp_Common->genericParameters.locationAndBandwidth, 275); // NRRIV2PRBOFFSET(initialDownlinkBWP->genericParameters.locationAndBandwidth, 275);
rel15->SubcarrierSpacing = initialDownlinkBWP->genericParameters.subcarrierSpacing;
rel15->dci_length = nr_dci_size(rel15->dci_format, NR_RNTI_RA, rel15->BWPSize);
for (int i = 0; i < sps; i++)
sps = initialDownlinkBWP->genericParameters.cyclicPrefix == NULL ? 14 : 12;
monitoringSymbolsWithinSlot = (css->monitoringSymbolsWithinSlot->buf[0]<<(sps-8)) | (css->monitoringSymbolsWithinSlot->buf[1]>>(16-sps));
rel15->rnti = mac->ra_rnti;
rel15->BWPSize = NRRIV2BW(initialDownlinkBWP->genericParameters.locationAndBandwidth, 275);
rel15->BWPStart = NRRIV2PRBOFFSET(bwp_Common->genericParameters.locationAndBandwidth, 275); // NRRIV2PRBOFFSET(initialDownlinkBWP->genericParameters.locationAndBandwidth, 275);
rel15->SubcarrierSpacing = initialDownlinkBWP->genericParameters.subcarrierSpacing;
rel15->dci_length = nr_dci_size(rel15->dci_format, NR_RNTI_RA, rel15->BWPSize);
for (int i = 0; i < sps; i++){
if ((monitoringSymbolsWithinSlot >> (sps - 1 - i)) & 1) {
rel15->coreset.StartSymbolIndex = i;
break;
}
fill_dci_search_candidates(css, rel15);
} else {
add_dci = 0;
}
fill_dci_search_candidates(css, rel15);
} else if (mac->ra_state == WAIT_CONTENTION_RESOLUTION){
rel15->rnti = mac->t_crnti;
......
openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c
View file @ e054b5e2
......@@ -933,104 +933,6 @@ NR_UE_L2_STATE_t nr_ue_scheduler(nr_downlink_indication_t *dl_info, nr_uplink_in
return UE_CONNECTION_OK;
}
// Notes:
// - Type1-PDCCH CSS configuration from ra-SearchSpace.
// - Msg2 is scheduled in the mixed slot or in the last dl slot if they are allowed by the Type 1 Common Search Space configuration
// todo:
// - if Type1-PDCCH CSS is not configured in RRC message (Coreset and SearchSpace), UE searches in Type 0 PDCCH CSS.
void nr_ue_msg2_scheduler(module_id_t mod_id,
uint16_t rach_frame,
uint16_t rach_slot,
uint16_t *msg2_frame,
uint16_t *msg2_slot){
uint8_t bwp_id = 1;
NR_UE_MAC_INST_t *mac = get_mac_inst(mod_id);
NR_ServingCellConfig_t *scd = mac->scd;
NR_ServingCellConfigCommon_t *scc = mac->scc;
NR_BWP_Downlink_t *bwp = scd->downlinkBWP_ToAddModList->list.array[bwp_id - 1];
NR_SearchSpace_t *ss;
struct NR_PDCCH_ConfigCommon__commonSearchSpaceList *commonSearchSpaceList = bwp->bwp_Common->pdcch_ConfigCommon->choice.setup->commonSearchSpaceList;
uint8_t mu = *scc->ssbSubcarrierSpacing;
uint8_t response_window = scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->rach_ConfigGeneric.ra_ResponseWindow;
uint8_t slot_window, slot_limit, frame_limit;
uint16_t start_next_period, monitoring_slot_period, monitoring_offset;
// number of mixed slot or of last dl slot if there is no mixed slot
uint16_t last_dl_slot_period = scc->tdd_UL_DL_ConfigurationCommon->pattern1.nrofDownlinkSlots;
uint16_t nr_dl_symbols = scc->tdd_UL_DL_ConfigurationCommon->pattern1.nrofDownlinkSymbols;
uint16_t nr_ul_symbols = scc->tdd_UL_DL_ConfigurationCommon->pattern1.nrofUplinkSymbols;
// lenght of tdd period in slots
uint16_t tdd_period_slot = last_dl_slot_period + scc->tdd_UL_DL_ConfigurationCommon->pattern1.nrofUplinkSlots;
AssertFatal(commonSearchSpaceList->list.count > 0, "PDCCH common SearchSpace list has 0 elements\n");
LOG_D(MAC, "Frame %d, Slot %d: Scheduling Msg2 reception \n", rach_frame, rach_slot);
// Common searchspace list
for (int i = 0; i < commonSearchSpaceList->list.count; i++) {
ss = commonSearchSpaceList->list.array[i];
if(ss->searchSpaceId == *bwp->bwp_Common->pdcch_ConfigCommon->choice.setup->ra_SearchSpace)
// retrieving ra pdcch monitoring period and offset
find_monitoring_periodicity_offset_common(ss, &monitoring_slot_period, &monitoring_offset);
}
if (nr_dl_symbols == 0)
last_dl_slot_period--;
if ((nr_dl_symbols > 0) || (nr_ul_symbols > 0))
tdd_period_slot++;
// computing start of next period
start_next_period = (rach_slot - (rach_slot % tdd_period_slot) + tdd_period_slot) % nr_slots_per_frame[mu];
*msg2_slot = start_next_period + last_dl_slot_period; // initializing scheduling of slot to next mixed (or last dl) slot
*msg2_frame = (*msg2_slot > rach_slot) ? rach_frame : (rach_frame +1);
switch(response_window){
case NR_RACH_ConfigGeneric__ra_ResponseWindow_sl1:
slot_window = 1;
break;
case NR_RACH_ConfigGeneric__ra_ResponseWindow_sl2:
slot_window = 2;
break;
case NR_RACH_ConfigGeneric__ra_ResponseWindow_sl4:
slot_window = 4;
break;
case NR_RACH_ConfigGeneric__ra_ResponseWindow_sl8:
slot_window = 8;
break;
case NR_RACH_ConfigGeneric__ra_ResponseWindow_sl10:
slot_window = 10;
break;
case NR_RACH_ConfigGeneric__ra_ResponseWindow_sl20:
slot_window = 20;
break;
case NR_RACH_ConfigGeneric__ra_ResponseWindow_sl40:
slot_window = 40;
break;
case NR_RACH_ConfigGeneric__ra_ResponseWindow_sl80:
slot_window = 80;
break;
default:
AssertFatal(1==0,"Invalid response window value %d\n",response_window);
}
AssertFatal(slot_window<=nr_slots_per_frame[mu], "Msg2 response window needs to be lower or equal to 10ms");
// slot and frame limit to transmit msg2 according to response window
slot_limit = (rach_slot + slot_window)%nr_slots_per_frame[mu];
frame_limit = (slot_limit>(rach_slot))? rach_frame : (rach_frame +1);
// go to previous slot if the current scheduled slot is beyond the response window
// and if the slot is not among the PDCCH monitored ones (38.213 10.1)
while ((*msg2_slot > slot_limit) || ((*msg2_frame*nr_slots_per_frame[mu] + *msg2_slot - monitoring_offset) % monitoring_slot_period != 0)) {
if((*msg2_slot % tdd_period_slot) > 0)
(*msg2_slot)--;
else
AssertFatal(1 == 0, "No available DL slot to schedule reception of msg2 has been found");
}
LOG_D(MAC, "Scheduled Msg2 reception in Frame %d, Slot %d: \n", *msg2_frame, *msg2_slot);
}
// This function schedules the PRACH according to prach_ConfigurationIndex and TS 38.211, tables 6.3.3.2.x
// It fills the PRACH PDU per each FD occasion.
// PRACH formats 9, 10, 11 are corresponding to dual PRACH format configurations A1/B1, A2/B2, A3/B3.
......@@ -2906,10 +2808,11 @@ int8_t nr_ue_process_dci(module_id_t module_id, int cc_id, uint8_t gNB_index, nr
dlsch_config_pdu_1_0->pucch_resource_id,
dlsch_config_pdu_1_0->pdsch_to_harq_feedback_time_ind);
if (mac->ra_rnti == rnti)
if (mac->RA_window_cnt >= 0 && rnti == mac->ra_rnti){
dl_config->dl_config_list[dl_config->number_pdus].pdu_type = FAPI_NR_DL_CONFIG_TYPE_RA_DLSCH;
else
} else {
dl_config->dl_config_list[dl_config->number_pdus].pdu_type = FAPI_NR_DL_CONFIG_TYPE_DLSCH;
}
// dl_config->dl_config_list[dl_config->number_pdus].dci_config_pdu.dci_config_rel15.N_RB_BWP = n_RB_DLBWP;
......
openair2/NR_UE_PHY_INTERFACE/NR_IF_Module.c
View file @ e054b5e2
......@@ -117,13 +117,6 @@ int nr_ue_ul_indication(nr_uplink_indication_t *ul_info){
if (is_nr_UL_slot(mac->scc, ul_info->slot_tx) && get_softmodem_params()->do_ra){
nr_ue_prach_scheduler(module_id, ul_info->frame_tx, ul_info->slot_tx);
if (mac->generate_nr_prach){
//uint16_t monitoring_slot_period, monitoring_offset;
uint16_t rach_frame = mac->scheduled_response.ul_config->sfn;
uint16_t rx_rach_frame = (rach_frame + mac->RA_offset) % MAX_FRAME_NUMBER; // compensate 2 frames offset delay at gNB side
uint16_t rach_slot = mac->scheduled_response.ul_config->slot;
nr_ue_msg2_scheduler(module_id, rx_rach_frame, rach_slot, &mac->msg2_rx_frame, &mac->msg2_rx_slot);
}
}
switch(ret){
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment