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Do generation of UL padding in nr_ue_get_sdu only

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- removed code from outside this function
- generate random padding in RFSIM mode
- generate 0 padding in real-time
- padding is generated either to complete the PDU or to transmit a new one
  when no data from RLC was fetched
This commit is contained in:
cig
2021-08-04 13:06:31 +02:00
committed by Thomas Schlichter
parent 02012e77ee
commit 07a80bc84e
1 changed files with 42 additions and 73 deletions
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openair2/LAYER2/NR_MAC_UE/nr_ue_scheduler.c
+42 -73
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@@ -1003,7 +1003,6 @@ NR_UE_L2_STATE_t nr_ue_scheduler(nr_downlink_indication_t *dl_info, nr_uplink_in
LOG_D(NR_MAC, "In %s:[%d.%d]: number of UL PDUs: %d with UL transmission in [%d.%d]\n", __FUNCTION__, frame_tx, slot_tx, ul_config->number_pdus, ul_config->sfn, ul_config->slot);
uint8_t ulsch_input_buffer[MAX_ULSCH_PAYLOAD_BYTES];
uint8_t data_existing = 0;
nr_scheduled_response_t scheduled_response;
fapi_nr_tx_request_t tx_req;
@@ -1035,45 +1034,15 @@ NR_UE_L2_STATE_t nr_ue_scheduler(nr_downlink_indication_t *dl_info, nr_uplink_in
mac->first_ul_tx[ulcfg_pdu->pusch_config_pdu.pusch_data.harq_process_id]==1)){
// Getting IP traffic to be transmitted
data_existing = nr_ue_get_sdu(mod_id,
frame_tx,
slot_tx,
gNB_index,
ulsch_input_buffer,
TBS_bytes);
nr_ue_get_sdu(mod_id, frame_tx, slot_tx, gNB_index, ulsch_input_buffer, TBS_bytes);
}
LOG_D(NR_MAC,"Flipping NDI for harq_id %d\n",ulcfg_pdu->pusch_config_pdu.pusch_data.new_data_indicator);
mac->UL_ndi[ulcfg_pdu->pusch_config_pdu.pusch_data.harq_process_id] = ulcfg_pdu->pusch_config_pdu.pusch_data.new_data_indicator;
mac->first_ul_tx[ulcfg_pdu->pusch_config_pdu.pusch_data.harq_process_id] = 0;
// TBR use the proper function !
//Random traffic to be transmitted if there is no IP traffic available for this Tx opportunity
if (!data_existing) {
//Use zeros for the header bytes in noS1 mode, in order to make sure that the LCID is not valid
//and block this traffic from being forwarded to the upper layers at the gNB
LOG_D(PHY, "In %s: Random data to be transmitted: TBS_bytes %d \n", __FUNCTION__, TBS_bytes);
//Give the first byte a dummy value (a value not corresponding to any valid LCID based on 38.321, Table 6.2.1-2)
//in order to distinguish the PHY random packets at the MAC layer of the gNB receiver from the normal packets that should
//have a valid LCID (nr_process_mac_pdu function)
ulsch_input_buffer[0] = UL_SCH_LCID_PADDING;
for (int i = 1; i < TBS_bytes; i++) {
ulsch_input_buffer[i] = (unsigned char) rand();
}
}
}
#ifdef DEBUG_MAC_PDU
LOG_D(PHY, "Is data existing ?: %d \n", data_existing);
LOG_I(PHY, "Printing MAC PDU to be encoded, TBS is: %d \n", TBS_bytes);
for (i = 0; i < TBS_bytes; i++) {
printf("%02x", ulsch_input_buffer[i]);
}
printf("\n");
#endif
// Config UL TX PDU
tx_req.slot = slot_tx;
tx_req.sfn = frame_tx;
@@ -2084,54 +2053,54 @@ uint8_t nr_ue_get_sdu(module_id_t module_idP,
}
}
if (num_sdus > 0) {
if (tot_mac_ce_len > 0) {
if (tot_mac_ce_len > 0) {
LOG_D(NR_MAC, "In %s copying %d bytes of MAC CEs to the UL PDU \n", __FUNCTION__, tot_mac_ce_len);
memcpy((void *) pdu, (void *) mac_header_control_elements, tot_mac_ce_len);
buflen_remain = buflen - (total_mac_pdu_header_len + sdu_length_total);
pdu += (unsigned char) tot_mac_ce_len;
#ifdef ENABLE_MAC_PAYLOAD_DEBUG
LOG_I(NR_MAC, "In %s: dumping MAC CE with length tot_mac_ce_len %d: \n", __FUNCTION__, tot_mac_ce_len);
log_dump(NR_MAC, mac_header_control_elements, tot_mac_ce_len, LOG_DUMP_CHAR, "\n");
#endif
}
// Compute final offset for padding and fill remainder of ULSCH with 0
if (buflen_remain > 0) {
((NR_MAC_SUBHEADER_FIXED *) pdu)->R = 0;
((NR_MAC_SUBHEADER_FIXED *) pdu)->LCID = UL_SCH_LCID_PADDING;
#ifdef ENABLE_MAC_PAYLOAD_DEBUG
LOG_I(NR_MAC, "In %s: padding MAC sub-header with length %ld bytes \n", __FUNCTION__, sizeof(NR_MAC_SUBHEADER_FIXED));
log_dump(NR_MAC, pdu, sizeof(NR_MAC_SUBHEADER_FIXED), LOG_DUMP_CHAR, "\n");
#endif
pdu++;
buflen_remain--;
for (int j = 0; j < buflen_remain; j++) {
pdu[j] = 0;
}
#ifdef ENABLE_MAC_PAYLOAD_DEBUG
LOG_I(NR_MAC, "In %s: MAC padding sub-PDU with length %d bytes \n", __FUNCTION__, buflen_remain);
log_dump(NR_MAC, pdu, buflen_remain, LOG_DUMP_CHAR, "\n");
#endif
}
LOG_D(NR_MAC, "In %s copying %d bytes of MAC CEs to the UL PDU \n", __FUNCTION__, tot_mac_ce_len);
memcpy((void *) pdu, (void *) mac_header_control_elements, tot_mac_ce_len);
buflen_remain = buflen - (total_mac_pdu_header_len + sdu_length_total);
pdu += (unsigned char) tot_mac_ce_len;
#ifdef ENABLE_MAC_PAYLOAD_DEBUG
LOG_I(NR_MAC, "In %s: dumping MAC PDU with length %d: \n", __FUNCTION__, buflen);
log_dump(NR_MAC, ulsch_buffer, buflen, LOG_DUMP_CHAR, "\n");
LOG_I(NR_MAC, "In %s: dumping MAC CE with length tot_mac_ce_len %d: \n", __FUNCTION__, tot_mac_ce_len);
log_dump(NR_MAC, mac_header_control_elements, tot_mac_ce_len, LOG_DUMP_CHAR, "\n");
#endif
}
// Compute final offset for padding and fill remainder of ULSCH with 0
if (buflen_remain > 0) {
((NR_MAC_SUBHEADER_FIXED *) pdu)->R = 0;
((NR_MAC_SUBHEADER_FIXED *) pdu)->LCID = UL_SCH_LCID_PADDING;
#ifdef ENABLE_MAC_PAYLOAD_DEBUG
LOG_I(NR_MAC, "In %s: padding MAC sub-header with length %ld bytes \n", __FUNCTION__, sizeof(NR_MAC_SUBHEADER_FIXED));
log_dump(NR_MAC, pdu, sizeof(NR_MAC_SUBHEADER_FIXED), LOG_DUMP_CHAR, "\n");
#endif
pdu++;
buflen_remain--;
if (IS_SOFTMODEM_RFSIM) {
for (int j = 0; j < buflen_remain; j++) {
pdu[j] = (unsigned char) rand();
}
} else {
memset(pdu, 0, buflen_remain);
}
#ifdef ENABLE_MAC_PAYLOAD_DEBUG
LOG_I(NR_MAC, "In %s: MAC padding sub-PDU with length %d bytes \n", __FUNCTION__, buflen_remain);
log_dump(NR_MAC, pdu, buflen_remain, LOG_DUMP_CHAR, "\n");
#endif
}
#ifdef ENABLE_MAC_PAYLOAD_DEBUG
LOG_I(NR_MAC, "In %s: dumping MAC PDU with length %d: \n", __FUNCTION__, buflen);
log_dump(NR_MAC, ulsch_buffer, buflen, LOG_DUMP_CHAR, "\n");
#endif
return num_sdus > 0 ? 1 : 0;
}