sched,improvement: filter out Msg3 UL SNR estimates from the TPC control loop

srsenb/src/stack/mac/sched_ue_ctrl/sched_ue_cell.cc

@@ -242,6 +242,10 @@ int sched_ue_cell::set_ack_info(tti_point tti_rx, uint32_t tb_idx, bool ack)
 int sched_ue_cell::set_ul_snr(tti_point tti_rx, float ul_snr, uint32_t ul_ch_code)
 {
   CHECK_VALID_CC("UL SNR estimate");
+  if (ue_cfg->ue_bearers[1].direction == sched_interface::ue_bearer_cfg_t::IDLE) {
+    // Ignore Msg3 SNR samples as Msg3 uses a separate power control loop
+    return SRSRAN_SUCCESS;
+  }
   tpc_fsm.set_snr(ul_snr, ul_ch_code);
   if (ul_ch_code == tpc::PUSCH_CODE) {
     ul_cqi_tti_rx = tti_rx;