merge NNSF feature based on v1.0.2

(cherry picked from commit b9e93a16379cf261502d9451b60bd787c07da64e)

openair2/RRC/LTE/rrc_eNB_S1AP.c

@@ -782,21 +782,37 @@ rrc_eNB_send_S1AP_NAS_FIRST_REQ(
         S1AP_NAS_FIRST_REQ (message_p).ue_identity.presenceMask |= UE_IDENTITIES_gummei;
 
         if (r_mme->plmn_Identity != NULL) {
-          if ((r_mme->plmn_Identity->mcc != NULL) && (r_mme->plmn_Identity->mcc->list.count > 0)) {
-            /* Use first indicated PLMN MCC if it is defined */
-            S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mcc = *r_mme->plmn_Identity->mcc->list.array[selected_plmn_identity];
+          if ((r_mme->plmn_Identity->mcc != NULL) && (r_mme->plmn_Identity->mcc->list.count == 3))
+          {
+            S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mcc = (*r_mme->plmn_Identity->mcc->list.array[0] & 0xf) * 100 +
+                                                                    (*r_mme->plmn_Identity->mcc->list.array[1] & 0xf) * 10 +
+                                                                    (*r_mme->plmn_Identity->mcc->list.array[2] & 0xf);
             LOG_I(S1AP, "[eNB %d] Build S1AP_NAS_FIRST_REQ adding in s_TMSI: GUMMEI MCC %u ue %x\n",
                   ctxt_pP->module_id,
                   S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mcc,
                   ue_context_pP->ue_context.rnti);
           }
-
-          if (r_mme->plmn_Identity->mnc.list.count > 0) {
-            /* Use first indicated PLMN MNC if it is defined */
-            S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mnc = *r_mme->plmn_Identity->mnc.list.array[selected_plmn_identity];
-            LOG_I(S1AP, "[eNB %d] Build S1AP_NAS_FIRST_REQ adding in s_TMSI: GUMMEI MNC %u ue %x\n",
+          if(r_mme->plmn_Identity->mnc.list.count == 3)
+          {
+            S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mnc = (*r_mme->plmn_Identity->mnc.list.array[0] & 0xf) * 100 +
+                                                                    (*r_mme->plmn_Identity->mnc.list.array[1] & 0xf) * 10 +
+                                                                    (*r_mme->plmn_Identity->mnc.list.array[2] & 0xf);
+            S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mnc_len = 3;
+            LOG_I(S1AP, "[eNB %d] Build S1AP_NAS_FIRST_REQ adding in s_TMSI: GUMMEI MNC %u %udigit ue %x\n",
+                  ctxt_pP->module_id,
+                  S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mnc,
+                  S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mnc_len,
+                  ue_context_pP->ue_context.rnti);
+          }
+          else if(r_mme->plmn_Identity->mnc.list.count == 2)
+          {
+            S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mnc = (*r_mme->plmn_Identity->mnc.list.array[0] & 0xf) * 10 +
+                                                                    (*r_mme->plmn_Identity->mnc.list.array[1] & 0xf);
+            S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mnc_len = 2;
+            LOG_I(S1AP, "[eNB %d] Build S1AP_NAS_FIRST_REQ adding in s_TMSI: GUMMEI MNC %u %udigit ue %x\n",
                   ctxt_pP->module_id,
                   S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mnc,
+                  S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mnc_len,
                   ue_context_pP->ue_context.rnti);
           }
         } else { // end if plmn_Identity != NULL

openair3/S1AP/s1ap_eNB_defs.h

@@ -164,6 +164,8 @@ typedef struct s1ap_eNB_mme_data_s {
 
   /* Only meaningfull in virtual mode */
   struct s1ap_eNB_instance_s *s1ap_eNB_instance;
+  
+  uint32_t nb_calls;
 } s1ap_eNB_mme_data_t;
 
 typedef struct s1ap_eNB_instance_s {

openair3/S1AP/s1ap_eNB_nas_procedures.c

@@ -138,8 +138,9 @@ int s1ap_eNB_handle_nas_first_req(
          * identity, selects the MME with the highest capacity.
          */
         mme_desc_p = s1ap_eNB_nnsf_select_mme(
-                         instance_p,
-                         s1ap_nas_first_req_p->establishment_cause);
+                       instance_p,
+                       s1ap_nas_first_req_p->establishment_cause,
+                       s1ap_nas_first_req_p->selected_plmn_identity);
 
         if (mme_desc_p) {
             S1AP_INFO("[eNB %d] Chose MME '%s' (assoc_id %d) through highest relative capacity\n",
@@ -232,9 +233,9 @@ int s1ap_eNB_handle_nas_first_req(
     MACRO_ENB_ID_TO_CELL_IDENTITY(instance_p->eNB_id,
                                   0, // Cell ID
                                   &ie->value.choice.EUTRAN_CGI.cell_ID);
-    MCC_MNC_TO_TBCD(instance_p->mcc[ue_desc_p->selected_plmn_identity],
-                    instance_p->mnc[ue_desc_p->selected_plmn_identity],
-                    instance_p->mnc_digit_length[ue_desc_p->selected_plmn_identity],
+    MCC_MNC_TO_TBCD(instance_p->mcc[mme_desc_p->broadcast_plmn_index[0]],
+                    instance_p->mnc[mme_desc_p->broadcast_plmn_index[0]],
+                    instance_p->mnc_digit_length[mme_desc_p->broadcast_plmn_index[0]],
                     &ie->value.choice.EUTRAN_CGI.pLMNidentity);
     ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
     /* Set the establishment cause according to those provided by RRC */
@@ -494,9 +495,9 @@ int s1ap_eNB_nas_uplink(instance_t instance, s1ap_uplink_nas_t *s1ap_uplink_nas_
     ie->criticality = S1AP_Criticality_ignore;
     ie->value.present = S1AP_UplinkNASTransport_IEs__value_PR_EUTRAN_CGI;
     MCC_MNC_TO_PLMNID(
-        s1ap_eNB_instance_p->mcc[ue_context_p->selected_plmn_identity],
-        s1ap_eNB_instance_p->mnc[ue_context_p->selected_plmn_identity],
-        s1ap_eNB_instance_p->mnc_digit_length[ue_context_p->selected_plmn_identity],
+        s1ap_eNB_instance_p->mcc[ue_context_p->mme_ref->broadcast_plmn_index[0]],
+        s1ap_eNB_instance_p->mnc[ue_context_p->mme_ref->broadcast_plmn_index[0]],
+        s1ap_eNB_instance_p->mnc_digit_length[ue_context_p->mme_ref->broadcast_plmn_index[0]],
         &ie->value.choice.EUTRAN_CGI.pLMNidentity);
     //#warning "TODO get cell id from RRC"
     MACRO_ENB_ID_TO_CELL_IDENTITY(s1ap_eNB_instance_p->eNB_id,

openair3/S1AP/s1ap_eNB_nnsf.c

@@ -38,13 +38,27 @@
 
 struct s1ap_eNB_mme_data_s *
 s1ap_eNB_nnsf_select_mme(s1ap_eNB_instance_t       *instance_p,
-                         rrc_establishment_cause_t  cause)
+                         rrc_establishment_cause_t  cause,
+                         uint32_t                   plmn_id)
 {
   struct s1ap_eNB_mme_data_s *mme_data_p = NULL;
   struct s1ap_eNB_mme_data_s *mme_highest_capacity_p = NULL;
-  uint8_t current_capacity = 0;
+  typedef struct MME_nnsf_inf {
+    struct s1ap_eNB_mme_data_s *mme_p;
+    uint64_t weight;
+  } MME_nnsf_inf_t;
+  
+  uint16_t capacity_sum = 0;
+  MME_nnsf_inf_t mme_inf[10];
+  int       cnt;
+  int       nb_mme = 0;
+  uint64_t  weight = 0;
+  
+  memset(mme_inf, 0, sizeof(mme_inf));
 
   RB_FOREACH(mme_data_p, s1ap_mme_map, &instance_p->s1ap_mme_head) {
+    struct served_gummei_s *gummei_p = NULL;
+    capacity_sum = capacity_sum + mme_data_p->relative_mme_capacity;
     if (mme_data_p->state != S1AP_ENB_STATE_CONNECTED) {
       /* The association between MME and eNB is not ready for the moment,
        * go to the next known MME.
@@ -79,11 +93,55 @@ s1ap_eNB_nnsf_select_mme(s1ap_eNB_instance_t       *instance_p,
       }
     }
 
-    if (current_capacity < mme_data_p->relative_mme_capacity) {
-      /* We find a better MME, keep a reference to it */
-      current_capacity = mme_data_p->relative_mme_capacity;
-      mme_highest_capacity_p = mme_data_p;
+    gummei_p = mme_data_p->served_gummei.stqh_first;
+    if( gummei_p != NULL )
+    {
+      struct plmn_identity_s *served_plmns_p = NULL;
+
+      served_plmns_p = gummei_p->served_plmns.stqh_first;
+      if( served_plmns_p != 0 )
+      for( cnt = 0 ; cnt < 8 ; cnt++)
+      {
+        if ( (served_plmns_p->mcc == instance_p->mcc[plmn_id]) &&
+          (served_plmns_p->mnc == instance_p->mnc[plmn_id]) )
+        {
+          mme_inf[nb_mme].mme_p = mme_data_p;
+          nb_mme++;
+          break;
+        }
+        if( served_plmns_p->next.stqe_next == 0 )
+        {
+          break;
+        }
+        served_plmns_p = served_plmns_p->next.stqe_next;
+      }
+    }
+  }
+  if( nb_mme != 0 )
+  {
+    for( cnt = 0 ; cnt < nb_mme ; cnt++ )
+    {
+      mme_inf[cnt].weight = (capacity_sum*10)/mme_inf[cnt].mme_p->relative_mme_capacity;
+      mme_inf[cnt].weight = (mme_inf[cnt].weight)*(mme_inf[cnt].mme_p->nb_calls + 1);
     }
+    mme_highest_capacity_p = mme_inf[0].mme_p;
+    weight = mme_inf[0].weight;
+    for( cnt = 1 ; cnt < nb_mme ; cnt++ )
+    {
+      if( weight > mme_inf[cnt].weight )
+      {
+        mme_highest_capacity_p = mme_inf[cnt].mme_p;
+        weight = mme_inf[cnt].weight;
+      }
+    }
+  }
+  else
+  {
+    mme_highest_capacity_p = NULL;
+  }
+  if( mme_highest_capacity_p != NULL )
+  {
+    mme_highest_capacity_p->nb_calls++;
   }
 
   return mme_highest_capacity_p;

openair3/S1AP/s1ap_eNB_nnsf.h

@@ -24,7 +24,8 @@
 
 struct s1ap_eNB_mme_data_s *
 s1ap_eNB_nnsf_select_mme(s1ap_eNB_instance_t       *instance_p,
-                         rrc_establishment_cause_t  cause);
+                         rrc_establishment_cause_t  cause,
+                         uint32_t                   plmn_id);
 
 struct s1ap_eNB_mme_data_s *
 s1ap_eNB_nnsf_select_mme_by_plmn_id(s1ap_eNB_instance_t       *instance_p,