add UL 64QAM support to eNB RRC and scheduler

lib/include/srslte/interfaces/sched_interface.h

@@ -145,6 +145,7 @@ public:
     std::vector<cc_cfg_t>               supported_cc_list; ///< list of UE supported CCs. First index for PCell
     ant_info_ded_t                      dl_ant_info;
     bool                                use_tbs_index_alt = false;
+    bool                                support_ul_64qam  = false;
   };
 
   typedef struct {

lib/src/asn1/rrc_utils.cc

@@ -878,6 +878,8 @@ static void set_rrc_ue_eutra_cap_t_gen(rrc_ue_capabilities_t&
     const asn1::rrc::rf_params_v1250_s& rf_params = ue_eutra_cap.rf_params_v1250;
     if (rf_params.supported_band_list_eutra_v1250_present) {
       ue_cap.support_dl_256qam = true;
+      ue_cap.support_ul_64qam  = (ue_cap.category == 5) or (ue_cap.category == 8 and ue_cap.release >= 10) or
+                                (ue_cap.category_ul == 5 or ue_cap.category_ul == 13 and ue_cap.release >= 12);
 
       for (const asn1::rrc::supported_band_eutra_v1250_s& supported_band : rf_params.supported_band_list_eutra_v1250) {
         ue_cap.support_dl_256qam &= supported_band.dl_minus256_qam_r12_present;

srsenb/hdr/stack/mac/scheduler_ue.h

@@ -73,9 +73,6 @@ struct cc_sched_ue {
   uint32_t ul_cqi_tti = 0;
   bool     dl_cqi_rx  = false;
 
-  // Enables or disables uplink 64QAM. Not yet functional.
-  bool ul_64qam_enabled = false;
-
   uint32_t max_mcs_dl = 28, max_mcs_dl_alt = 27, max_mcs_ul = 28;
   uint32_t max_aggr_level = 3;
   int      fixed_mcs_ul = 0, fixed_mcs_dl = 0;

srsenb/hdr/stack/rrc/mac_controller.h

@@ -43,11 +43,14 @@ public:
   void handle_con_setup_complete();
   void handle_con_reest_complete();
 
-  void handle_con_reconf(const asn1::rrc::rrc_conn_recfg_r8_ies_s& conn_recfg);
+  void handle_con_reconf(const asn1::rrc::rrc_conn_recfg_r8_ies_s& conn_recfg,
+                         const srslte::rrc_ue_capabilities_t&      uecaps);
   void handle_con_reconf_complete();
 
-  void handle_target_enb_ho_cmd(const asn1::rrc::rrc_conn_recfg_r8_ies_s& conn_recfg);
-  void handle_intraenb_ho_cmd(const asn1::rrc::rrc_conn_recfg_r8_ies_s& conn_recfg);
+  void handle_target_enb_ho_cmd(const asn1::rrc::rrc_conn_recfg_r8_ies_s& conn_recfg,
+                                const srslte::rrc_ue_capabilities_t&      uecaps);
+  void handle_intraenb_ho_cmd(const asn1::rrc::rrc_conn_recfg_r8_ies_s& conn_recfg,
+                              const srslte::rrc_ue_capabilities_t&      uecaps);
   void handle_ho_prep(const asn1::rrc::ho_prep_info_r8_ies_s& ho_prep);
 
   const ue_cfg_t& get_ue_sched_cfg() const { return current_sched_ue_cfg; }

srsenb/src/stack/mac/scheduler_ue.cc

@@ -1239,13 +1239,21 @@ int sched_ue::enb_to_ue_cc_idx(uint32_t enb_cc_idx) const
 
 int cc_sched_ue::cqi_to_tbs(uint32_t nof_prb, uint32_t nof_re, bool use_tbs_index_alt, bool is_ul, uint32_t* mcs)
 {
-
-  uint32_t cqi     = is_ul ? ul_cqi : dl_cqi;
-  uint32_t max_mcs = is_ul ? max_mcs_ul : (cfg->use_tbs_index_alt) ? max_mcs_dl_alt : max_mcs_dl;
-  uint32_t max_Qm  = is_ul and not ul_64qam_enabled ? 4 : (not is_ul and use_tbs_index_alt ? 8 : 6);
+  uint32_t cqi, max_mcs, max_Qm;
+  float    max_coderate;
+  if (is_ul) {
+    cqi          = ul_cqi;
+    max_mcs      = cfg->support_ul_64qam ? max_mcs_ul : std::min(max_mcs_ul, 20u);
+    max_Qm       = cfg->support_ul_64qam ? 6 : 4;
+    max_coderate = srslte_cqi_to_coderate(std::min(cqi + 1u, 15u), false);
+  } else {
+    cqi          = dl_cqi;
+    max_mcs      = cfg->use_tbs_index_alt ? max_mcs_dl_alt : max_mcs_dl;
+    max_Qm       = use_tbs_index_alt ? 8 : 6;
+    max_coderate = srslte_cqi_to_coderate(std::min(cqi + 1u, 15u), use_tbs_index_alt);
+  }
 
   // Take the upper bound code-rate
-  float    max_coderate = srslte_cqi_to_coderate(std::min(cqi + 1u, 15u), use_tbs_index_alt);
   int      sel_mcs  = max_mcs + 1;
   float    coderate = 99;
   int      tbs      = 0;

srsenb/src/stack/rrc/mac_controller.cc

@@ -64,7 +64,8 @@ void ue_cfg_apply_srb_updates(ue_cfg_t& ue_cfg, const srb_to_add_mod_list_l& srb
  */
 void ue_cfg_apply_reconf_complete_updates(ue_cfg_t&                            ue_cfg,
                                           const rrc_conn_recfg_r8_ies_s&       conn_recfg,
-                                          const cell_ctxt_dedicated_list& ue_cell_list);
+                                          const cell_ctxt_dedicated_list&      ue_cell_list,
+                                          const srslte::rrc_ue_capabilities_t& uecaps);
 
 /**
  * Adds to sched_interface::ue_cfg_t the changes present in the asn1 RRCReconfiguration message related to
@@ -191,7 +192,8 @@ void rrc::ue::mac_controller::handle_con_reest_complete()
   mac->phy_config_enabled(rrc_ue->rnti, true);
 }
 
-void rrc::ue::mac_controller::handle_con_reconf(const asn1::rrc::rrc_conn_recfg_r8_ies_s& conn_recfg)
+void rrc::ue::mac_controller::handle_con_reconf(const asn1::rrc::rrc_conn_recfg_r8_ies_s& conn_recfg,
+                                                const srslte::rrc_ue_capabilities_t&      uecaps)
 {
   if (conn_recfg.rr_cfg_ded_present and conn_recfg.rr_cfg_ded.phys_cfg_ded_present) {
     ue_cfg_apply_phy_cfg_ded(current_sched_ue_cfg, conn_recfg.rr_cfg_ded.phys_cfg_ded, *rrc_cfg);
@@ -199,7 +201,7 @@ void rrc::ue::mac_controller::handle_con_reconf(const asn1::rrc::rrc_conn_recfg_
 
   // Store MAC updates that are applied once RRCReconfigurationComplete is received
   next_sched_ue_cfg = current_sched_ue_cfg;
-  ue_cfg_apply_reconf_complete_updates(next_sched_ue_cfg, conn_recfg, rrc_ue->cell_ded_list);
+  ue_cfg_apply_reconf_complete_updates(next_sched_ue_cfg, conn_recfg, rrc_ue->cell_ded_list, uecaps);
 
   // Temporarily freeze new allocations for DRBs (SRBs are needed to send RRC Reconf Message)
   set_drb_activation(false);
@@ -238,14 +240,15 @@ void rrc::ue::mac_controller::apply_current_bearers_cfg()
   }
 }
 
-void rrc::ue::mac_controller::handle_target_enb_ho_cmd(const asn1::rrc::rrc_conn_recfg_r8_ies_s& conn_recfg)
+void rrc::ue::mac_controller::handle_target_enb_ho_cmd(const asn1::rrc::rrc_conn_recfg_r8_ies_s& conn_recfg,
+                                                       const srslte::rrc_ue_capabilities_t&      uecaps)
 {
   if (conn_recfg.rr_cfg_ded_present and conn_recfg.rr_cfg_ded.phys_cfg_ded_present) {
     ue_cfg_apply_phy_cfg_ded(current_sched_ue_cfg, conn_recfg.rr_cfg_ded.phys_cfg_ded, *rrc_cfg);
   }
 
   next_sched_ue_cfg = current_sched_ue_cfg;
-  ue_cfg_apply_reconf_complete_updates(next_sched_ue_cfg, conn_recfg, rrc_ue->cell_ded_list);
+  ue_cfg_apply_reconf_complete_updates(next_sched_ue_cfg, conn_recfg, rrc_ue->cell_ded_list, uecaps);
 
   // Temporarily freeze new allocations for DRBs (SRBs are needed to send RRC Reconf Message)
   set_drb_activation(false);
@@ -255,7 +258,8 @@ void rrc::ue::mac_controller::handle_target_enb_ho_cmd(const asn1::rrc::rrc_conn
   mac->phy_config_enabled(rrc_ue->rnti, false);
 }
 
-void rrc::ue::mac_controller::handle_intraenb_ho_cmd(const asn1::rrc::rrc_conn_recfg_r8_ies_s& conn_recfg)
+void rrc::ue::mac_controller::handle_intraenb_ho_cmd(const asn1::rrc::rrc_conn_recfg_r8_ies_s& conn_recfg,
+                                                     const srslte::rrc_ue_capabilities_t&      uecaps)
 {
   next_sched_ue_cfg = current_sched_ue_cfg;
   next_sched_ue_cfg.supported_cc_list.resize(1);
@@ -265,7 +269,7 @@ void rrc::ue::mac_controller::handle_intraenb_ho_cmd(const asn1::rrc::rrc_conn_r
   if (conn_recfg.rr_cfg_ded_present and conn_recfg.rr_cfg_ded.phys_cfg_ded_present) {
     ue_cfg_apply_phy_cfg_ded(next_sched_ue_cfg, conn_recfg.rr_cfg_ded.phys_cfg_ded, *rrc_cfg);
   }
-  ue_cfg_apply_reconf_complete_updates(next_sched_ue_cfg, conn_recfg, rrc_ue->cell_ded_list);
+  ue_cfg_apply_reconf_complete_updates(next_sched_ue_cfg, conn_recfg, rrc_ue->cell_ded_list, uecaps);
 
   // Freeze SCells
   // NOTE: this avoids that the UE receives an HOCmd retx from target cell and do an incorrect RLC-level concatenation
@@ -383,7 +387,8 @@ void ue_cfg_apply_srb_updates(ue_cfg_t& ue_cfg, const srb_to_add_mod_list_l& srb
 
 void ue_cfg_apply_reconf_complete_updates(ue_cfg_t&                            ue_cfg,
                                           const rrc_conn_recfg_r8_ies_s&       conn_recfg,
-                                          const cell_ctxt_dedicated_list& ue_cell_list)
+                                          const cell_ctxt_dedicated_list&      ue_cell_list,
+                                          const srslte::rrc_ue_capabilities_t& uecaps)
 {
   // Configure RadioResourceConfigDedicated
   if (conn_recfg.rr_cfg_ded_present) {
@@ -448,6 +453,11 @@ void ue_cfg_apply_reconf_complete_updates(ue_cfg_t&                       ue_cfg
       }
     }
   }
+
+  // Params non-dependent on Reconf message content
+  if (uecaps.support_ul_64qam) {
+    ue_cfg.support_ul_64qam = true;
+  }
 }
 
 } // namespace srsenb

srsenb/src/stack/rrc/rrc_mobility.cc

@@ -1105,7 +1105,7 @@ void rrc::ue::rrc_mobility::handle_ho_req(idle_st& s, const ho_req_rx_ev& ho_req
   rrc_ue->apply_pdcp_srb_updates(rrc_ue->current_rr_cfg);
   rrc_ue->apply_rlc_rb_updates(rrc_ue->current_rr_cfg);
   // Update MAC
-  rrc_ue->mac_ctrl->handle_target_enb_ho_cmd(recfg_r8);
+  rrc_ue->mac_ctrl->handle_target_enb_ho_cmd(recfg_r8, rrc_ue->ue_capabilities);
   // Apply PHY updates
   rrc_ue->apply_reconf_phy_config(recfg_r8, true);
 
@@ -1286,7 +1286,7 @@ void rrc::ue::rrc_mobility::intraenb_ho_st::enter(rrc_mobility* f, const ho_meas
   rrc_conn_recfg_r8_ies_s& reconf_r8 = dl_dcch_msg.msg.c1().rrc_conn_recfg().crit_exts.c1().rrc_conn_recfg_r8();
 
   // Apply changes to the MAC scheduler
-  f->rrc_ue->mac_ctrl->handle_intraenb_ho_cmd(reconf_r8);
+  f->rrc_ue->mac_ctrl->handle_intraenb_ho_cmd(reconf_r8, f->rrc_ue->ue_capabilities);
 
   f->rrc_ue->apply_setup_phy_common(f->rrc_enb->cfg.sibs[1].sib2().rr_cfg_common, false);
   f->rrc_ue->apply_reconf_phy_config(reconf_r8, false);

srsenb/src/stack/rrc/rrc_ue.cc

@@ -507,7 +507,7 @@ void rrc::ue::send_connection_reconf(srslte::unique_byte_buffer_t pdu, bool phy_
   apply_rlc_rb_updates(recfg_r8.rr_cfg_ded);
 
   // UE MAC scheduler updates
-  mac_ctrl->handle_con_reconf(recfg_r8);
+  mac_ctrl->handle_con_reconf(recfg_r8, ue_capabilities);
 
   // Reuse same PDU
   if (pdu != nullptr) {
@@ -1012,6 +1012,7 @@ void rrc::ue::apply_reconf_phy_config(const rrc_conn_recfg_r8_ies_s& reconfig_r8
     if (rr_cfg_ded.phys_cfg_ded_present) {
       auto& phys_cfg_ded = rr_cfg_ded.phys_cfg_ded;
       srslte::set_phy_cfg_t_dedicated_cfg(&phy_rrc_dedicated_list[0].phy_cfg, phys_cfg_ded);
+      srslte::set_phy_cfg_t_enable_64qam(&phy_rrc_dedicated_list[0].phy_cfg, ue_capabilities.support_ul_64qam);
     }
   }
 
@@ -1044,6 +1045,9 @@ void rrc::ue::apply_reconf_phy_config(const rrc_conn_recfg_r8_ies_s& reconfig_r8
             // Get corresponding eNB CC index
             scell_phy_rrc_ded.enb_cc_idx = ue_cc->cell_common->enb_cc_idx;
 
+            srslte::set_phy_cfg_t_enable_64qam(&phy_rrc_dedicated_list[scell.scell_idx_r10].phy_cfg,
+                                               ue_capabilities.support_ul_64qam);
+
             // Append to PHY RRC config dedicated which will be applied further down
             phy_rrc_dedicated_list[scell.scell_idx_r10] = scell_phy_rrc_ded;
           }