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Commit 7f740654 authored by Gabriel's avatar Gabriel
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BSR fixes for ping

parent 69ccc900
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openair2/LAYER2/MAC/ue_procedures.c
+ 100
− 58
View file @ 7f740654
...@@ -1313,20 +1313,23 @@ void ue_get_sdu(module_id_t module_idP,int CC_id,frame_t frameP,sub_frame_t subf ...@@ -1313,20 +1313,23 @@ void ue_get_sdu(module_id_t module_idP,int CC_id,frame_t frameP,sub_frame_t subf
} }
if (num_lcg_id_with_data){ if (num_lcg_id_with_data){
LOG_I(MAC,"[UE %d] MAC Tx data pending at frame%d subframe %d nb LCG =%d LCG0 bytes=%d BSR Trigger status =%d TBS=%d\n", LOG_D(MAC,"[UE %d] MAC Tx data pending at frame%d subframe %d nb LCG =%d Bytes for LCG0=%d LCG1=%d LCG2=%d LCG3=%d BSR Trigger status =%d TBS=%d\n",
module_idP, frameP, subframe, num_lcg_id_with_data, UE_mac_inst[module_idP].scheduling_info.BSR_bytes[0],UE_mac_inst[module_idP].BSR_reporting_active, buflen); module_idP,
frameP,
subframe,
num_lcg_id_with_data,
UE_mac_inst[module_idP].scheduling_info.BSR_bytes[0],
UE_mac_inst[module_idP].scheduling_info.BSR_bytes[1],
UE_mac_inst[module_idP].scheduling_info.BSR_bytes[2],
UE_mac_inst[module_idP].scheduling_info.BSR_bytes[3],
UE_mac_inst[module_idP].BSR_reporting_active, buflen);
} }
// ReTxBSR-Timer expires, trigger BSR //Restart ReTxBSR Timer at new grant indication (36.321)
if ((num_lcg_id_with_data) && (UE_mac_inst[module_idP].scheduling_info.retxBSR_SF == 0)){ if (UE_mac_inst[module_idP].scheduling_info.retxBSR_SF != MAC_UE_BSR_TIMER_NOT_RUNNING){
UE_mac_inst[module_idP].scheduling_info.retxBSR_SF = get_sf_retxBSRTimer(UE_mac_inst[module_idP].scheduling_info.retxBSR_Timer);
// If the UE has data to transmit, trigger a BSR
UE_mac_inst[module_idP].BSR_reporting_active = 1;
LOG_I(MAC,"[UE %d] MAC BSR Triggered ReTxBSR Timer expiry at frame%d subframe %d TBS=%d\n",
module_idP, frameP, subframe, buflen);
} }
// periodicBSR-Timer expires, trigger BSR // periodicBSR-Timer expires, trigger BSR
if ((UE_mac_inst[module_idP].scheduling_info.periodicBSR_Timer != MAC_MainConfig__ul_SCH_Config__periodicBSR_Timer_infinity) if ((UE_mac_inst[module_idP].scheduling_info.periodicBSR_Timer != MAC_MainConfig__ul_SCH_Config__periodicBSR_Timer_infinity)
&& (UE_mac_inst[module_idP].scheduling_info.periodicBSR_SF == 0)){ && (UE_mac_inst[module_idP].scheduling_info.periodicBSR_SF == 0)){
...@@ -1342,6 +1345,17 @@ void ue_get_sdu(module_id_t module_idP,int CC_id,frame_t frameP,sub_frame_t subf ...@@ -1342,6 +1345,17 @@ void ue_get_sdu(module_id_t module_idP,int CC_id,frame_t frameP,sub_frame_t subf
if (UE_mac_inst[module_idP].BSR_reporting_active){ if (UE_mac_inst[module_idP].BSR_reporting_active){
if (buflen >= 4){ if (buflen >= 4){
if (num_lcg_id_with_data <= 1){ if (num_lcg_id_with_data <= 1){
// If there are no data to transmit Set LCGID short to the group of the first DTCH configured else it will be SRB
if (num_lcg_id_with_data == 0) {
for (lcid=DTCH; lcid < MAX_NUM_LCID; lcid++) {
if (UE_mac_inst[module_idP].logicalChannelConfig[lcid] != NULL) {
lcg_id_bsr_short = UE_mac_inst[module_idP].scheduling_info.LCGID[lcid];
break;
}
}
}
bsr_ce_len = sizeof(BSR_SHORT); //1 byte bsr_ce_len = sizeof(BSR_SHORT); //1 byte
} }
else{ else{
...@@ -1417,30 +1431,32 @@ void ue_get_sdu(module_id_t module_idP,int CC_id,frame_t frameP,sub_frame_t subf ...@@ -1417,30 +1431,32 @@ void ue_get_sdu(module_id_t module_idP,int CC_id,frame_t frameP,sub_frame_t subf
DCCH, DCCH,
(buflen-dcch_header_len-bsr_len-phr_len)); (buflen-dcch_header_len-bsr_len-phr_len));
LOG_D(MAC, "[UE %d] Frame %d : UL-DCCH -> ULSCH, RLC SRB1 has %d bytes to " LOG_D(MAC, "[UE %d] Frame %d : UL-DCCH -> ULSCH, RLC SRB1 has %d bytes to "
"send (Transport Block size %d BSR size=%d PHR=%d SDU Length Total %d , mac header len %d)\n", "send (Transport Block size %d BSR size=%d PHR=%d SDU Length Total %d , mac header len %d BSR byte before Tx=%d)\n",
module_idP,frameP, rlc_status.bytes_in_buffer,buflen,bsr_len,phr_len,sdu_length_total,dcch_header_len); module_idP,frameP, rlc_status.bytes_in_buffer,buflen,bsr_len,phr_len,sdu_length_total,dcch_header_len,UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[DCCH]]);
sdu_lengths[0] += mac_rlc_data_req(module_idP,
UE_mac_inst[module_idP].crnti,
eNB_index,
frameP,
ENB_FLAG_NO,
MBMS_FLAG_NO,
DCCH,
(char *)&ulsch_buff[sdu_lengths[0]]);
/* Update BSR : substract transmitted data */ /* Update BSR : substract transmitted data */
if (UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[DCCH]] >= rlc_status.bytes_in_buffer){ if (UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[DCCH]] >= sdu_lengths[0]){
UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[DCCH]] -= rlc_status.bytes_in_buffer; UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[DCCH]] -= sdu_lengths[0];
} }
else if (rlc_status.bytes_in_buffer){ else {
LOG_I(MAC, "[UE %d] Frame %d Subframe%d: WARNING Buffer occupancy =%d for LCGID%d is lower than data to transmit=%d for LCID%d\n", LOG_I(MAC, "[UE %d] Frame %d Subframe%d: WARNING Buffer occupancy =%d for LCGID%d is lower than data transmitted=%d for LCID%d\n",
module_idP,frameP,subframe, module_idP,frameP,subframe,
UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[DCCH]], UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[DCCH]],
UE_mac_inst[module_idP].scheduling_info.LCGID[DCCH], UE_mac_inst[module_idP].scheduling_info.LCGID[DCCH],
rlc_status.bytes_in_buffer,DCCH); sdu_lengths[0],DCCH);
UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[DCCH]] = 0; UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[DCCH]] = 0;
} }
sdu_lengths[0] += mac_rlc_data_req(module_idP,
UE_mac_inst[module_idP].crnti,
eNB_index,
frameP,
ENB_FLAG_NO,
MBMS_FLAG_NO,
DCCH,
(char *)&ulsch_buff[sdu_lengths[0]]);
sdu_length_total += sdu_lengths[0]; sdu_length_total += sdu_lengths[0];
sdu_lcids[0] = DCCH; sdu_lcids[0] = DCCH;
...@@ -1473,30 +1489,31 @@ void ue_get_sdu(module_id_t module_idP,int CC_id,frame_t frameP,sub_frame_t subf ...@@ -1473,30 +1489,31 @@ void ue_get_sdu(module_id_t module_idP,int CC_id,frame_t frameP,sub_frame_t subf
(buflen-bsr_len-phr_len-dcch_header_len-dcch1_header_len-sdu_length_total)); (buflen-bsr_len-phr_len-dcch_header_len-dcch1_header_len-sdu_length_total));
LOG_D(MAC,"[UE %d] Frame %d subframe %d: UL-DCCH1 -> ULSCH, RLC SRB2 has %d bytes to" LOG_D(MAC,"[UE %d] Frame %d subframe %d: UL-DCCH1 -> ULSCH, RLC SRB2 has %d bytes to"
" send (Transport Block size %d BSR size=%d PHR=%d SRB1 Hdr %d SDU Length Total %d , mac header len %d)\n", " send (Transport Block size %d BSR size=%d PHR=%d SRB1 Hdr %d SDU Length Total %d , mac header len %d BSR byte before Tx=%d)\n",
module_idP,frameP, subframe, rlc_status.bytes_in_buffer,buflen,bsr_len,phr_len,dcch_header_len,sdu_length_total,dcch1_header_len); module_idP,frameP, subframe, rlc_status.bytes_in_buffer,buflen,bsr_len,phr_len,dcch_header_len,sdu_length_total,dcch1_header_len,UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[DCCH1]]);
sdu_lengths[num_sdus] = mac_rlc_data_req(module_idP,
UE_mac_inst[module_idP].crnti,
eNB_index,
frameP,
ENB_FLAG_NO,
MBMS_FLAG_NO,
DCCH1,
(char *)&ulsch_buff[sdu_lengths[num_sdus]]);
/* Update BSR : substract transmitted data */ /* Update BSR : substract transmitted data */
if (UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[DCCH1]] >= rlc_status.bytes_in_buffer){ if (UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[DCCH1]] >= sdu_lengths[num_sdus]){
UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[DCCH1]] -= rlc_status.bytes_in_buffer; UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[DCCH1]] -= sdu_lengths[num_sdus];
} }
else if (rlc_status.bytes_in_buffer){ else {
LOG_I(MAC, "[UE %d] Frame %d Subframe%d: WARNING Buffer occupancy =%d for LCGID%d is lower than data to transmit=%d for LCID%d\n", LOG_I(MAC, "[UE %d] Frame %d Subframe%d: WARNING Buffer occupancy =%d for LCGID%d is lower than data transmitted=%d for LCID%d\n",
module_idP,frameP,subframe, module_idP,frameP,subframe,
UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[DCCH1]], UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[DCCH1]],
UE_mac_inst[module_idP].scheduling_info.LCGID[DCCH1], UE_mac_inst[module_idP].scheduling_info.LCGID[DCCH1],
rlc_status.bytes_in_buffer,DCCH1); sdu_lengths[num_sdus],DCCH1);
UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[DCCH1]] = 0; UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[DCCH1]] = 0;
} }
sdu_lengths[num_sdus] = mac_rlc_data_req(module_idP,
UE_mac_inst[module_idP].crnti,
eNB_index,
frameP,
ENB_FLAG_NO,
MBMS_FLAG_NO,
DCCH1,
(char *)&ulsch_buff[sdu_lengths[num_sdus]]);
sdu_length_total += sdu_lengths[num_sdus]; sdu_length_total += sdu_lengths[num_sdus];
sdu_lcids[num_sdus] = DCCH1; sdu_lcids[num_sdus] = DCCH1;
LOG_D(MAC,"[UE %d] TX Multiplex RLC PDU Got %d bytes for SRB2\n",module_idP,sdu_lengths[num_sdus]); LOG_D(MAC,"[UE %d] TX Multiplex RLC PDU Got %d bytes for SRB2\n",module_idP,sdu_lengths[num_sdus]);
...@@ -1513,7 +1530,7 @@ void ue_get_sdu(module_id_t module_idP,int CC_id,frame_t frameP,sub_frame_t subf ...@@ -1513,7 +1530,7 @@ void ue_get_sdu(module_id_t module_idP,int CC_id,frame_t frameP,sub_frame_t subf
dtch_header_len=0; dtch_header_len=0;
dtch_header_len_last=0; dtch_header_len_last=0;
for (lcid=NB_RB_MAX-1; lcid>=DTCH ; lcid--){ for (lcid=MAX_NUM_LCID-1; lcid>=DTCH ; lcid--){
dtch_header_len+=3; dtch_header_len+=3;
dtch_header_len_last=3; dtch_header_len_last=3;
...@@ -1521,6 +1538,8 @@ void ue_get_sdu(module_id_t module_idP,int CC_id,frame_t frameP,sub_frame_t subf ...@@ -1521,6 +1538,8 @@ void ue_get_sdu(module_id_t module_idP,int CC_id,frame_t frameP,sub_frame_t subf
if ((UE_mac_inst[module_idP].scheduling_info.LCID_status[lcid] == LCID_NOT_EMPTY) && if ((UE_mac_inst[module_idP].scheduling_info.LCID_status[lcid] == LCID_NOT_EMPTY) &&
(all_pdu_len <= buflen)) { (all_pdu_len <= buflen)) {
AssertFatal (UE_mac_inst[module_idP].logicalChannelConfig[lcid] != NULL, "LCID (%d) is not active!\n", lcid);
// optimize the dtch header lenght // optimize the dtch header lenght
//if ((UE_mac_inst[module_idP].scheduling_info.BSR_bytes[DTCH] > 128) && //if ((UE_mac_inst[module_idP].scheduling_info.BSR_bytes[DTCH] > 128) &&
/* if (((UE_mac_inst[module_idP].scheduling_info.BSR_bytes[DTCH] >= 128) && /* if (((UE_mac_inst[module_idP].scheduling_info.BSR_bytes[DTCH] >= 128) &&
...@@ -1539,23 +1558,10 @@ void ue_get_sdu(module_id_t module_idP,int CC_id,frame_t frameP,sub_frame_t subf ...@@ -1539,23 +1558,10 @@ void ue_get_sdu(module_id_t module_idP,int CC_id,frame_t frameP,sub_frame_t subf
lcid, lcid,
buflen-all_pdu_len); buflen-all_pdu_len);
LOG_D(MAC,"[UE %d] Frame %d : UL-DTCH -> ULSCH%d, %d bytes to send (Transport Block size %d, mac header len %d, BSR byte[%d] %d)\n", LOG_D(MAC,"[UE %d] Frame %d subframe %d: UL-DTCH -> ULSCH%d, %d bytes to send (Transport Block size %d, mac header len %d, BSR byte before Tx=%d)\n",
module_idP,frameP, lcid, rlc_status.bytes_in_buffer,buflen,dtch_header_len, module_idP,frameP, subframe,lcid, rlc_status.bytes_in_buffer,buflen,dtch_header_len, UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[lcid]]);
lcid, UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[lcid]]);
if (rlc_status.bytes_in_buffer > 0) { if (rlc_status.bytes_in_buffer > 0) {
/* Update BSR : substract transmitted data */
if (UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[lcid]] >= rlc_status.bytes_in_buffer){
UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[lcid]] -= rlc_status.bytes_in_buffer;
}
else {
LOG_I(MAC, "[UE %d] Frame %d Subframe%d: WARNING Buffer occupancy =%d for LCGID%d is lower than data to transmit=%d for LCID%d\n",
module_idP,frameP,subframe,
UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[lcid]],
UE_mac_inst[module_idP].scheduling_info.LCGID[lcid],
rlc_status.bytes_in_buffer,lcid);
UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[lcid]] = 0;
}
sdu_lengths[num_sdus] = mac_rlc_data_req(module_idP, sdu_lengths[num_sdus] = mac_rlc_data_req(module_idP,
UE_mac_inst[module_idP].crnti, UE_mac_inst[module_idP].crnti,
...@@ -1566,8 +1572,21 @@ void ue_get_sdu(module_id_t module_idP,int CC_id,frame_t frameP,sub_frame_t subf ...@@ -1566,8 +1572,21 @@ void ue_get_sdu(module_id_t module_idP,int CC_id,frame_t frameP,sub_frame_t subf
lcid, lcid,
(char *)&ulsch_buff[sdu_length_total]); (char *)&ulsch_buff[sdu_length_total]);
/* Update BSR : substract transmitted data */
if (UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[lcid]] >= sdu_lengths[num_sdus]){
UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[lcid]] -= sdu_lengths[num_sdus];
}
else {
LOG_I(MAC, "[UE %d] Frame %d Subframe %d: WARNING Buffer occupancy =%d for LCGID%d is lower than data transmitted=%d for LCID%d\n",
module_idP,frameP,subframe,
UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[lcid]],
UE_mac_inst[module_idP].scheduling_info.LCGID[lcid],
sdu_lengths[num_sdus],lcid);
UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[lcid]] = 0;
}
//adjust dtch header //adjust dtch header
LOG_D(MAC,"[UE %d] TX Got %d bytes for DTCH\n",module_idP,sdu_lengths[num_sdus]); LOG_D(MAC,"[UE %d] Frame %d Subframe %d TX Got %d bytes for DTCH%d New BSR bytes=%d\n",module_idP,frameP,subframe,sdu_lengths[num_sdus],lcid,UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[lcid]]);
sdu_lcids[num_sdus] = lcid; sdu_lcids[num_sdus] = lcid;
sdu_length_total += sdu_lengths[num_sdus]; sdu_length_total += sdu_lengths[num_sdus];
if (sdu_lengths[num_sdus] < 128) { if (sdu_lengths[num_sdus] < 128) {
...@@ -1595,6 +1614,15 @@ void ue_get_sdu(module_id_t module_idP,int CC_id,frame_t frameP,sub_frame_t subf ...@@ -1595,6 +1614,15 @@ void ue_get_sdu(module_id_t module_idP,int CC_id,frame_t frameP,sub_frame_t subf
UE_mac_inst[module_idP].scheduling_info.BSR[lcg_id] = locate_BsrIndexByBufferSize(BSR_TABLE, BSR_TABLE_SIZE, UE_mac_inst[module_idP].scheduling_info.BSR_bytes[lcg_id]); UE_mac_inst[module_idP].scheduling_info.BSR[lcg_id] = locate_BsrIndexByBufferSize(BSR_TABLE, BSR_TABLE_SIZE, UE_mac_inst[module_idP].scheduling_info.BSR_bytes[lcg_id]);
} }
if (bsr_ce_len) {
//Print updated BSR when sent
LOG_D(MAC,"[UE %d] Frame %d Subframe %d TX BSR size=%d BSR0=%d BSR1=%d BSR2=%d BSR3=%d\n",module_idP,frameP,subframe,bsr_ce_len,
UE_mac_inst[module_idP].scheduling_info.BSR[0],
UE_mac_inst[module_idP].scheduling_info.BSR[1],
UE_mac_inst[module_idP].scheduling_info.BSR[2],
UE_mac_inst[module_idP].scheduling_info.BSR[3]);
}
if (bsr_ce_len == 0 ) { if (bsr_ce_len == 0 ) {
bsr_s = NULL; bsr_s = NULL;
bsr_l = NULL ; bsr_l = NULL ;
...@@ -1751,6 +1779,8 @@ ue_scheduler( ...@@ -1751,6 +1779,8 @@ ue_scheduler(
// int8_t lcg_id; // int8_t lcg_id;
struct RACH_ConfigCommon *rach_ConfigCommon = (struct RACH_ConfigCommon *)NULL; struct RACH_ConfigCommon *rach_ConfigCommon = (struct RACH_ConfigCommon *)NULL;
protocol_ctxt_t ctxt; protocol_ctxt_t ctxt;
int num_lcid_with_data = 0;
#if defined(ENABLE_ITTI) #if defined(ENABLE_ITTI)
MessageDef *msg_p; MessageDef *msg_p;
const char *msg_name; const char *msg_name;
...@@ -1931,6 +1961,8 @@ ue_scheduler( ...@@ -1931,6 +1961,8 @@ ue_scheduler(
} }
if (update_bsr(module_idP,frameP, eNB_indexP, lcid, UE_mac_inst[module_idP].scheduling_info.LCGID[lcid])) { if (update_bsr(module_idP,frameP, eNB_indexP, lcid, UE_mac_inst[module_idP].scheduling_info.LCGID[lcid])) {
// TO DO: implement first BSR trigger criteria based on new data become available
num_lcid_with_data ++;
UE_mac_inst[module_idP].scheduling_info.SR_pending= 1; UE_mac_inst[module_idP].scheduling_info.SR_pending= 1;
// Regular BSR trigger // Regular BSR trigger
UE_mac_inst[module_idP].BSR_reporting_active = 1; UE_mac_inst[module_idP].BSR_reporting_active = 1;
...@@ -1942,6 +1974,16 @@ ue_scheduler( ...@@ -1942,6 +1974,16 @@ ue_scheduler(
} }
} }
// Trigger Regular BSR if ReTxBSR Timer has expired and UE has data for transmission
if ((num_lcid_with_data) && (UE_mac_inst[module_idP].scheduling_info.retxBSR_SF == 0)) {
UE_mac_inst[module_idP].BSR_reporting_active = 1;
LOG_D(MAC,"[UE %d] PDCCH Tick : MAC BSR Triggered ReTxBSR Timer expiry at frame %d subframe %d\n",
module_idP, frameP, subframeP);
}
// UE has no valid phy config dedicated || no valid/released SR // UE has no valid phy config dedicated || no valid/released SR
if ((UE_mac_inst[module_idP].physicalConfigDedicated == NULL)) { if ((UE_mac_inst[module_idP].physicalConfigDedicated == NULL)) {
// cancel all pending SRs // cancel all pending SRs
......
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