From 5eb6dac7db84acf874107e3b14ba83e31f13db3a Mon Sep 17 00:00:00 2001
From: Javier Morgade <javier.morgade@ieee.org>
Date: Tue, 21 Jul 2020 15:09:38 +0200
Subject: [PATCH] fembms: routines for decoding the UE FeMBMS/PMCH
physical/multicast/transport channel 3GPP TS 36.211 version 14.2.0
Signed-off-by: Javier Morgade <javier.morgade@ieee.org>
---
openair1/PHY/LTE_TRANSPORT/pmch.c | 50 +++++++++++
openair1/PHY/LTE_TRANSPORT/pmch_common.c | 103 ++++++++++++++++++-----
2 files changed, 134 insertions(+), 19 deletions(-)
diff --git a/openair1/PHY/LTE_TRANSPORT/pmch.c b/openair1/PHY/LTE_TRANSPORT/pmch.c
index 90e2836b1e7..7b508239a9f 100644
--- a/openair1/PHY/LTE_TRANSPORT/pmch.c
+++ b/openair1/PHY/LTE_TRANSPORT/pmch.c
@@ -128,3 +128,53 @@ void generate_mch(PHY_VARS_eNB *eNB,L1_rxtx_proc_t *proc,uint8_t *a)
}
+void generate_mch_khz_1dot25(PHY_VARS_eNB *eNB,L1_rxtx_proc_t *proc,uint8_t *a)
+{
+
+ int G;
+ int subframe = proc->subframe_tx;
+ int frame = proc->frame_tx;
+ //int bits;
+
+ G = get_G_khz_1dot25(&eNB->frame_parms,
+ eNB->frame_parms.N_RB_DL,
+ eNB->dlsch_MCH->harq_processes[0]->rb_alloc,
+ get_Qm(eNB->dlsch_MCH->harq_processes[0]->mcs),1,
+ 2,proc->frame_tx,subframe,0);
+
+ //FeMBMS
+ eNB->dlsch_MCH->harq_processes[0]->Qm = get_Qm(eNB->dlsch_MCH->harq_processes[0]->mcs);
+
+
+ generate_mbsfn_pilot_khz_1dot25(eNB,proc,
+ eNB->common_vars.txdataF,
+ AMP);
+
+
+ AssertFatal(dlsch_encoding_fembms_pmch(eNB,
+ proc,
+ // a,
+ eNB->dlsch_MCH->harq_processes[0]->pdu,
+ 1,
+ eNB->dlsch_MCH,
+ proc->frame_tx,
+ subframe,
+ &eNB->dlsch_rate_matching_stats,
+ &eNB->dlsch_turbo_encoding_stats,
+ &eNB->dlsch_interleaving_stats)==0,
+ "problem in dlsch_encoding");
+
+
+ /*for(bits=0;bits<G;bits++)
+ printf("%d",eNB->dlsch_MCH->harq_processes[0]->e[bits]);
+ printf("\n");*/
+
+ dlsch_scrambling(&eNB->frame_parms,1,eNB->dlsch_MCH,0,G,0,frame,subframe<<1);
+
+ mch_modulation_khz_1dot25(eNB->common_vars.txdataF,
+ AMP,
+ subframe,
+ &eNB->frame_parms,
+ eNB->dlsch_MCH);
+}
+
diff --git a/openair1/PHY/LTE_TRANSPORT/pmch_common.c b/openair1/PHY/LTE_TRANSPORT/pmch_common.c
index 03bf5a378b2..8d65dd2744d 100644
--- a/openair1/PHY/LTE_TRANSPORT/pmch_common.c
+++ b/openair1/PHY/LTE_TRANSPORT/pmch_common.c
@@ -37,23 +37,84 @@
int is_fembms_cas_subframe(uint32_t frame, int subframe, LTE_DL_FRAME_PARMS *frame_parms) {
- uint32_t period;
-
- if(frame_parms->NonMBSFN_config_flag ) {
- period = 4<<frame_parms->NonMBSFN_config.radioframeAllocationPeriod;
-
- if ((frame % period) == frame_parms->NonMBSFN_config.radioframeAllocationOffset) {
+ //uint32_t period;
+
+ //if(frame_parms->NonMBSFN_config_flag ) {
+ // period = 4<<frame_parms->NonMBSFN_config.radioframeAllocationPeriod;
+
+ // if ((frame % period) == frame_parms->NonMBSFN_config.radioframeAllocationOffset) {
+ // switch (subframe) {
+ // case 0:
+ // return(1); //This should be CAS
+ // break;
+ // }
+ // }
+ //}
+ if(frame_parms->NonMBSFN_config_flag || frame_parms->FeMBMS_active){
+ if ((frame&3)==0) {
switch (subframe) {
case 0:
- return(1); //This should be CAS
- break;
+ return(1); //This should be CAS
+ break;
}
- }
+ }
+
}
return (0);
}
+int is_fembms_nonMBSFN_subframe(uint32_t frame, int subframe, LTE_DL_FRAME_PARMS *frame_parms){
+ uint32_t period;
+ if(frame_parms->NonMBSFN_config_flag ) {
+ period = 4<<frame_parms->NonMBSFN_config.radioframeAllocationPeriod;
+ if ((frame % period) == frame_parms->NonMBSFN_config.radioframeAllocationOffset) {
+ switch (subframe) {
+ case 0:
+ return(1); //This should be CAS
+ break;
+ case 1:
+ if ((frame_parms->NonMBSFN_config.non_mbsfn_SubframeConfig & 0x100) > 0)
+ return(1);
+ break;
+ case 2:
+ if ((frame_parms->NonMBSFN_config.non_mbsfn_SubframeConfig & 0x80) > 0)
+ return(1);
+ break;
+ case 3:
+ if ((frame_parms->NonMBSFN_config.non_mbsfn_SubframeConfig & 0x40) > 0)
+ return(1);
+ break;
+ case 4:
+ if ((frame_parms->NonMBSFN_config.non_mbsfn_SubframeConfig & 0x20) > 0)
+ return(1);
+ break;
+ case 5:
+ if ((frame_parms->NonMBSFN_config.non_mbsfn_SubframeConfig & 0x10) > 0)
+ return(1);
+ break;
+ case 6:
+ if ((frame_parms->NonMBSFN_config.non_mbsfn_SubframeConfig & 0x8) > 0)
+ return(1);
+ break;
+ case 7:
+ if ((frame_parms->NonMBSFN_config.non_mbsfn_SubframeConfig & 0x4) > 0)
+ return(1);
+ break;
+ case 8:
+ if ((frame_parms->NonMBSFN_config.non_mbsfn_SubframeConfig & 0x2) > 0)
+ return(1);
+ break;
+ case 9:
+ if ((frame_parms->NonMBSFN_config.non_mbsfn_SubframeConfig & 0x1) > 0)
+ return(1);
+ break;
+ }
+ }
+ }
+ return (0);
+}
+
int is_fembms_pmch_subframe(uint32_t frame, int subframe, LTE_DL_FRAME_PARMS *frame_parms) {
uint32_t period;
@@ -62,63 +123,67 @@ int is_fembms_pmch_subframe(uint32_t frame, int subframe, LTE_DL_FRAME_PARMS *fr
if ((frame % period) == frame_parms->NonMBSFN_config.radioframeAllocationOffset) {
switch (subframe) {
+ case 0:
+ return(0);
+ break;
case 1:
if ((frame_parms->NonMBSFN_config.non_mbsfn_SubframeConfig & 0x100) > 0)
- return(1);
+ return(0);
break;
case 2:
if ((frame_parms->NonMBSFN_config.non_mbsfn_SubframeConfig & 0x80) > 0)
- return(1);
+ return(0);
break;
case 3:
if ((frame_parms->NonMBSFN_config.non_mbsfn_SubframeConfig & 0x40) > 0)
- return(1);
+ return(0);
break;
case 4:
if ((frame_parms->NonMBSFN_config.non_mbsfn_SubframeConfig & 0x20) > 0)
- return(1);
+ return(0);
break;
case 5:
if ((frame_parms->NonMBSFN_config.non_mbsfn_SubframeConfig & 0x10) > 0)
- return(1);
+ return(0);
break;
case 6:
if ((frame_parms->NonMBSFN_config.non_mbsfn_SubframeConfig & 0x8) > 0)
- return(1);
+ return(0);
break;
case 7:
if ((frame_parms->NonMBSFN_config.non_mbsfn_SubframeConfig & 0x4) > 0)
- return(1);
+ return(0);
break;
case 8:
if ((frame_parms->NonMBSFN_config.non_mbsfn_SubframeConfig & 0x2) > 0)
- return(1);
+ return(0);
break;
case 9:
if ((frame_parms->NonMBSFN_config.non_mbsfn_SubframeConfig & 0x1) > 0)
- return(1);
+ return(0);
break;
}
- } else { //Then regular MBSFN FeMBMS subframe
+ } else if((frame_parms->FeMBMS_active == 1 || frame_parms->NonMBSFN_config_flag == 1 ) && !is_fembms_cas_subframe(frame,subframe,frame_parms) ) { //Then regular MBSFN FeMBMS subframe
return(1);
}
+ return(1);
}
return(0);
--
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