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fixing mac pdu generation. to be checked by fraunhofer

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This commit is contained in:
Florian Kaltenberger
2019-12-19 13:32:53 +01:00
parent b1f224d11e
commit db6eeb2773
2 changed files with 33 additions and 53 deletions
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openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_dlsch.c
+3 -3
View File
@@ -164,13 +164,13 @@ int nr_generate_dlsch_pdu(module_id_t module_idP,
((NR_MAC_SUBHEADER_FIXED *) mac_pdu_ptr)->LCID = DL_SCH_LCID_PADDING;
mac_pdu_ptr++;
// compute final offset
offset = ((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;
openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_phytest.c
+30 -50
View File
@@ -37,7 +37,7 @@
extern RAN_CONTEXT_t RC;
//#define ENABLE_MAC_PAYLOAD_DEBUG 1
uint8_t mac_payload[MAX_NR_DLSCH_PAYLOAD_BYTES];
uint8_t mac_pdu[MAX_NR_DLSCH_PAYLOAD_BYTES];
/*Scheduling of DLSCH with associated DCI in common search space
* current version has only a DCI for type 1 PDCCH for C_RNTI*/
@@ -280,18 +280,11 @@ void nr_schedule_uss_dlsch_phytest(module_id_t module_idP,
int padding = 0, post_padding = 0, ta_len = 0, header_length_total = 0, sdu_length_total = 0, num_sdus = 0;
int CC_id, lcid, offset, i, j=0, k=0, header_length_last, TBS_bytes;
// hardcoded parameters to 30 kHz
// for DMRS configuration type 1
unsigned char dlsch_buffer[MAX_NR_DLSCH_PAYLOAD_BYTES];
uint8_t Qm = 2;
uint16_t R = 697;
uint16_t nb_rb = 50;
uint32_t TBS = nr_compute_tbs(Qm, R, nb_rb, 12, 6, 0, 1)/8; // this is in bits TODO use nr_get_tbs
int UE_id = 0;
uint16_t rnti = 0x1234;
uint16_t sfn_sf = frameP << 7 | slotP;
printf("TBS=%d\n",TBS);
uint8_t mac_sdus[MAX_NR_DLSCH_PAYLOAD_BYTES];
for (CC_id = 0; CC_id < RC.nb_nr_mac_CC[module_idP]; CC_id++) {
@@ -301,31 +294,28 @@ void nr_schedule_uss_dlsch_phytest(module_id_t module_idP,
TX_req = &gNB_mac->TX_req[CC_id].tx_request_body.tx_pdu_list[gNB_mac->TX_req[CC_id].tx_request_body.number_of_pdus];
ta_len = gNB_mac->ta_len;
TBS_bytes = configure_fapi_dl_Tx(dl_req, TX_req, cfg, &gNB_mac->coreset[CC_id][1], &gNB_mac->search_space[CC_id][1], gNB_mac->pdu_index[CC_id], dlsch_config);
//printf("TBS_bytes=%d (bytes)\n",TBS_bytes);
//The --NOS1 use case currently schedules DLSCH transmissions only when there is IP traffic arriving
//through the LTE stack
if (IS_SOFTMODEM_NOS1){
// Hardcode it for now
//TBS = 6784/8; //TBS in bytes
//nr_get_tbs_dl(&dl_config_dlsch_pdu->dlsch_pdu, dl_config_dci_pdu->dci_dl_pdu, *cfg);
//TBS = dl_config_dlsch_pdu->dlsch_pdu.dlsch_pdu_rel15.transport_block_size;
/* TODO
// RLC data on DCCH
if (TBS - ta_len - header_length_total - sdu_length_total - 3 > 0) {
if (TBS_bytes - ta_len - header_length_total - sdu_length_total - 3 > 0) {
}*/
/* TODO
// RLC data on DCCH1
if (TBS - ta_len - header_length_total - sdu_length_total - 3 > 0) {
if (TBS_bytes - ta_len - header_length_total - sdu_length_total - 3 > 0) {
}*/
for (lcid = NB_RB_MAX - 1; lcid >= DTCH; lcid--) {
LOG_D(MAC, "[gNB %d], Frame %d, DTCH%d->DLSCH, Checking RLC status (tbs %d, len %d)\n",
module_idP, frameP, lcid, TBS, TBS - ta_len - header_length_total - sdu_length_total - 3);
module_idP, frameP, lcid, TBS_bytes, TBS_bytes - ta_len - header_length_total - sdu_length_total - 3);
if (TBS - ta_len - header_length_total - sdu_length_total - 3 > 0) {
if (TBS_bytes - ta_len - header_length_total - sdu_length_total - 3 > 0) {
rlc_status = mac_rlc_status_ind(module_idP,
rnti,
module_idP,
@@ -334,14 +324,14 @@ void nr_schedule_uss_dlsch_phytest(module_id_t module_idP,
ENB_FLAG_YES,
MBMS_FLAG_NO,
lcid,
TBS - ta_len - header_length_total - sdu_length_total - 3,
TBS_bytes - ta_len - header_length_total - sdu_length_total - 3,
0,
0);
if (rlc_status.bytes_in_buffer > 0) {
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_idP, frameP, TBS - ta_len - header_length_total - sdu_length_total - 3,
lcid, header_length_total, TBS);
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_bytes: %d \n \n",
module_idP, frameP, TBS_bytes - ta_len - header_length_total - sdu_length_total - 3,
lcid, header_length_total, TBS_bytes);
sdu_lengths[num_sdus] = mac_rlc_data_req(module_idP,
rnti,
@@ -350,8 +340,8 @@ void nr_schedule_uss_dlsch_phytest(module_id_t module_idP,
ENB_FLAG_YES,
MBMS_FLAG_NO,
lcid,
TBS,
(char *)&dlsch_buffer[sdu_length_total],
TBS_bytes,
(char *)&mac_sdus[sdu_length_total],
0,
0);
@@ -374,7 +364,7 @@ void nr_schedule_uss_dlsch_phytest(module_id_t module_idP,
//ue_sched_ctl->uplane_inactivity_timer = 0;
}
} else { // no TBS left
} else { // no TBS_bytes left
break;
}
}
@@ -392,26 +382,17 @@ void nr_schedule_uss_dlsch_phytest(module_id_t module_idP,
// fill dlsch_buffer with random data
for (i = 0; i < TBS/8; i++){
dlsch_buffer[i] = (unsigned char) rand(); //i&0xFF;
for (i = 0; i < TBS_bytes; i++){
mac_sdus[i] = (unsigned char) rand(); //i&0xFF;
}
//Sending SDUs with size 1
//Initialize elements of sdu_lcids and sdu_lengths
//TODO this will be eventually be removed
while (TBS >= 3 + header_length_total + sdu_length_total + ta_len){
if (k < NR_MAX_NB_RB && j < NR_MAX_NB_RB){
sdu_lcids[j] = 0x05; // DRB
sdu_lengths[k] = 1;
header_length_total += 2;
sdu_length_total += 1;
num_sdus +=1;
k++, j++;
}
else {
break;
}
}
sdu_lcids[0] = 0x05; // DRB
sdu_lengths[0] = TBS_bytes-3;
header_length_total += 2;
sdu_length_total += sdu_lengths[0];
num_sdus +=1;
} // else IS_SOFTMODEM_NOS1
// there is at least one SDU or TA command
@@ -419,10 +400,10 @@ void nr_schedule_uss_dlsch_phytest(module_id_t module_idP,
if (ta_len + sdu_length_total + header_length_total > 0) {
// Check if there is data from RLC or CE
if (TBS >= 2 + header_length_total + sdu_length_total + ta_len) {
if (TBS_bytes >= 2 + header_length_total + sdu_length_total + ta_len) {
// we have to consider padding
// padding param currently not in use
padding = TBS - header_length_total - sdu_length_total - ta_len - 1;
padding = TBS_bytes - header_length_total - sdu_length_total - ta_len - 1;
post_padding = 1;
} else {
padding = 0;
@@ -431,8 +412,8 @@ void nr_schedule_uss_dlsch_phytest(module_id_t module_idP,
offset = nr_generate_dlsch_pdu(module_idP,
(unsigned char *) dlsch_buffer,
(unsigned char *) mac_payload,
(unsigned char *) mac_sdus,
(unsigned char *) mac_pdu,
num_sdus, //num_sdus
sdu_lengths,
sdu_lcids,
@@ -442,15 +423,14 @@ void nr_schedule_uss_dlsch_phytest(module_id_t module_idP,
// Padding: fill remainder of DLSCH with 0
if (post_padding > 0){
for (int j = 0; j < (TBS - offset); j++)
mac_payload[offset + j] = 0;
for (int j = 0; j < (TBS_bytes - offset); j++)
mac_pdu[offset + j] = 0;
}
TBS_bytes = configure_fapi_dl_Tx(dl_req, TX_req, cfg, &gNB_mac->coreset[CC_id][1], &gNB_mac->search_space[CC_id][1], gNB_mac->pdu_index[CC_id], dlsch_config);
//TX_req->segments[0].segment_length = 8;
TX_req->segments[0].segment_length = TBS_bytes + 2;
TX_req->segments[0].segment_data = mac_payload;
TX_req->segments[0].segment_data = mac_pdu;
gNB_mac->TX_req[CC_id].tx_request_body.number_of_pdus++;
gNB_mac->TX_req[CC_id].sfn_sf = sfn_sf;