- fixing pmch file test for standard LTE rates

- adding special value for MTCH stop
- adding error messages for config values incompatible with MBMS

lib/include/srslte/common/pdu.h

@@ -239,6 +239,8 @@ public:
     MTCH_MAX_LCID = 0b11100,
     MCH_SCHED_INFO = 0b11110,
 
+    /*MTCH STOP Value*/
+    MTCH_STOP_EMPTY = 0b11111111111,
     /* Common */
     PADDING = 0b11111,
     SDU = 0b00000

lib/src/common/pdu.cc

@@ -454,13 +454,17 @@ int sch_subh::get_bsr(uint32_t buff_size[4])
 
 bool sch_subh::get_next_mch_sched_info(uint8_t *lcid_, uint16_t *mtch_stop)
 {
+  uint16_t mtch_stop_ce;
   if(payload) {
     nof_mch_sched_ce = nof_bytes/2;
     if (cur_mch_sched_ce < nof_mch_sched_ce) {
       *lcid_     = (payload[cur_mch_sched_ce * 2] & 0xF8) >> 3;
-      *mtch_stop = ((uint16_t)(payload[cur_mch_sched_ce * 2] & 0x07)) << 8;
+      mtch_stop_ce = ((uint16_t)(payload[cur_mch_sched_ce * 2] & 0x07)) << 8;
-      *mtch_stop += payload[cur_mch_sched_ce * 2 + 1];
+      mtch_stop_ce += payload[cur_mch_sched_ce * 2 + 1];
       cur_mch_sched_ce++;
+      *mtch_stop = (mtch_stop_ce == srslte::mch_subh::MTCH_STOP_EMPTY)
+                       ? (0)
+                       : (mtch_stop_ce);
       return true;
     }
   }
@@ -613,8 +617,11 @@ bool sch_subh::set_ta_cmd(uint8_t ta_cmd)
 bool sch_subh::set_next_mch_sched_info(uint8_t lcid_, uint16_t mtch_stop)
 {
   if (((sch_pdu*)parent)->has_space_ce(2, true)) {
-    w_payload_ce[nof_mch_sched_ce*2] = (lcid_&0x1F) << 3 | (uint8_t) ((mtch_stop&0x0700)>>8);
+    uint16_t mtch_stop_ce =
-    w_payload_ce[nof_mch_sched_ce*2+1] = (uint8_t) (mtch_stop&0xff);
+        (mtch_stop) ? (mtch_stop) : (srslte::mch_subh::MTCH_STOP_EMPTY);
+    w_payload_ce[nof_mch_sched_ce * 2] =
+        (lcid_ & 0x1F) << 3 | (uint8_t)((mtch_stop_ce & 0x0700) >> 8);
+    w_payload_ce[nof_mch_sched_ce * 2 + 1] = (uint8_t)(mtch_stop_ce & 0xff);
     nof_mch_sched_ce++;
     lcid = MCH_SCHED_INFO;
     ((sch_pdu*)parent)->update_space_ce(2, true);

lib/src/phy/phch/test/pmch_file_test.c

@@ -159,7 +159,7 @@ int main(int argc, char **argv) {
     exit(-1);
   }
   parse_args(argc,argv);
-
+  srslte_use_standard_symbol_size(false);
   if (base_init()) {
     ERROR("Error initializing memory\n");
     exit(-1);
@@ -215,9 +215,9 @@ int main(int argc, char **argv) {
   srslte_pdsch_res_t pdsch_res;
   pdsch_res.payload = data;
   ret               = srslte_ue_dl_decode_pmch(&ue_dl, &dl_sf, &pmch_cfg, &pdsch_res);
-  if (ret >= 0) {
+  if (pdsch_res.crc == 1) {
     printf("PMCH Decoded OK!\n");
-  }  else if (ret < 0) {
+  } else if (pdsch_res.crc == 0) {
     printf("Error decoding PMCH\n");
   }
 

srsenb/src/mac/mac.cc

@@ -663,14 +663,14 @@ void mac::build_mch_sched(uint32_t tbs)
 
   int last_mtch_stop = 0;
 
-  if(total_bytes_to_tx >= total_space_avail_bytes){
+  if (total_bytes_to_tx >= total_space_avail_bytes) {
     for(uint32_t i = 0; i < mch.num_mtch_sched;i++){
        double ratio =  mch.mtch_sched[i].lcid_buffer_size/total_bytes_to_tx;
        float assigned_sfs = floor(sfs_per_sched_period*ratio);
        mch.mtch_sched[i].stop = last_mtch_stop + (uint32_t)assigned_sfs;
        last_mtch_stop = mch.mtch_sched[i].stop;
     }
-  }else {
+  } else {
     for(uint32_t i = 0; i < mch.num_mtch_sched;i++){
       float assigned_sfs =  ceil(((float)mch.mtch_sched[i].lcid_buffer_size)/((float)bytes_per_sf));
       mch.mtch_sched[i].stop = last_mtch_stop + (uint32_t)assigned_sfs;
@@ -694,8 +694,10 @@ int mac::get_mch_sched(uint32_t tti, bool is_mcch, dl_sched_t* dl_sched_res)
     build_mch_sched(mcs_data.tbs);
     mch.mcch_payload = mcch_payload_buffer;
     mch.current_sf_allocation_num = 1;
-    Info("MCH Sched Info: LCID: %d, Stop: %d, tti is %d \n", mch.mtch_sched[0].lcid, mch.mtch_sched[0].stop, tti);
+    Info("MCH Sched Info: LCID: %d, Stop: %d, tti is %d \n",
-    phy_h->set_mch_period_stop(mch.mtch_sched[0].stop);
+         mch.mtch_sched[0].lcid, mch.mtch_sched[mch.num_mtch_sched - 1].stop,
+         tti);
+    phy_h->set_mch_period_stop(mch.mtch_sched[mch.num_mtch_sched - 1].stop);
     for(uint32_t i = 0; i < mch.num_mtch_sched; i++) {
       mch.pdu[i].lcid = srslte::sch_subh::MCH_SCHED_INFO;
      // mch.mtch_sched[i].lcid = 1+i;

srsue/src/main.cc

@@ -536,6 +536,26 @@ int main(int argc, char* argv[])
     exit(1);
   }
 
+  if (args.expert.mbms_service > -1) {
+    if (!args.expert.phy.interpolate_subframe_enabled) {
+      fprintf(stderr, "interpolate_subframe_enabled = %d, While using MBMS, "
+                      "please set interpolate_subframe_enabled to true\n",
+              args.expert.phy.interpolate_subframe_enabled);
+      exit(1);
+    }
+    if (args.expert.phy.nof_phy_threads > 2) {
+      fprintf(stderr, "nof_phy_threads = %d, While using MBMS, please set "
+                      "number of phy threads to 1 or 2\n",
+              args.expert.phy.nof_phy_threads);
+      exit(1);
+    }
+    if ((0 == args.expert.phy.snr_estim_alg.find("refs"))) {
+      fprintf(stderr, "snr_estim_alg = refs, While using MBMS, please set "
+                      "algorithm to pss or empty \n");
+      exit(1);
+    }
+  }
+
   metricshub.init(ue, args.expert.metrics_period_secs);
   metricshub.add_listener(&metrics_screen);
   metrics_screen.set_ue_handle(ue);