Clean up previous BWP switching implementation that was not F1 compliant

CMakeLists.txt

@@ -1271,7 +1271,6 @@ set(L2_NR_SRC
   ${NR_SDAP_SRC}
   ${NR_RRC_DIR}/rrc_gNB.c
   ${NR_RRC_DIR}/nr_rrc_common.c
-  ${NR_RRC_DIR}/L2_nr_interface.c
   ${NR_RRC_DIR}/mac_rrc_dl_direct.c
   ${NR_RRC_DIR}/mac_rrc_dl_f1ap.c
   ${NR_RRC_DIR}/nr_rrc_config.c

doc/Doxyfile

@@ -1901,7 +1901,6 @@ INPUT                  = \
 @CMAKE_CURRENT_SOURCE_DIR@/../openair2/RRC/NR/nr_rrc_config.h \
 @CMAKE_CURRENT_SOURCE_DIR@/../openair2/RRC/NR/rrc_gNB_radio_bearers.h \
 @CMAKE_CURRENT_SOURCE_DIR@/../openair2/RRC/NR/nr_rrc_extern.h \
-@CMAKE_CURRENT_SOURCE_DIR@/../openair2/RRC/NR/L2_nr_interface.c \
 @CMAKE_CURRENT_SOURCE_DIR@/../openair2/RRC/NR/rrc_gNB_reconfig.c \
 @CMAKE_CURRENT_SOURCE_DIR@/../openair2/RRC/NR/rrc_gNB_NGAP.c \
 @CMAKE_CURRENT_SOURCE_DIR@/../openair2/RRC/NR/mac_rrc_dl_f1ap.c \

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler.c

@@ -201,8 +201,6 @@ void gNB_dlsch_ulsch_scheduler(module_id_t module_idP, frame_t frame, sub_frame_
 
   nr_mac_update_timers(module_idP, frame, slot);
 
-  schedule_nr_bwp_switch(module_idP, frame, slot);
-
   // This schedules MIB
   schedule_nr_mib(module_idP, frame, slot, &sched_info->DL_req);
 

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_primitives.c

@@ -2012,8 +2012,6 @@ void configure_UE_BWP(gNB_MAC_INST *nr_mac,
   else {
     DL_BWP = &UE->current_DL_BWP;
     UL_BWP = &UE->current_UL_BWP;
-    sched_ctrl->next_dl_bwp_id = -1;
-    sched_ctrl->next_ul_bwp_id = -1;
     CellGroup = UE->CellGroup;
   }
   NR_BWP_Downlink_t *dl_bwp = NULL;
@@ -2302,8 +2300,6 @@ NR_UE_info_t *add_new_nr_ue(gNB_MAC_INST *nr_mac, rnti_t rntiP, NR_CellGroupConf
   sched_ctrl->sched_pusch.time_domain_allocation = -1;
 
   /* Set default BWPs */
-  sched_ctrl->next_dl_bwp_id = -1;
-  sched_ctrl->next_ul_bwp_id = -1;
   AssertFatal(ul_bwp->n_ul_bwp <= NR_MAX_NUM_BWP,
               "uplinkBWP_ToAddModList has %d BWP!\n",
               ul_bwp->n_ul_bwp);
@@ -2851,39 +2847,6 @@ void nr_mac_update_timers(module_id_t module_id,
   }
 }
 
-void schedule_nr_bwp_switch(module_id_t module_id,
-                            frame_t frame,
-                            sub_frame_t slot)
-{
-  /* already mutex protected: held in gNB_dlsch_ulsch_scheduler() */
-  NR_SCHED_ENSURE_LOCKED(&RC.nrmac[module_id]->sched_lock);
-
-  NR_UEs_t *UE_info = &RC.nrmac[module_id]->UE_info;
-
-  // TODO: Implementation of a algorithm to perform:
-  //  - DL BWP selection:     sched_ctrl->next_dl_bwp_id = dl_bwp_id
-  //  - UL BWP selection:     sched_ctrl->next_ul_bwp_id = ul_bwp_id
-
-  UE_iterator(UE_info->list, UE) {
-    NR_UE_sched_ctrl_t *sched_ctrl = &UE->UE_sched_ctrl;
-    NR_UE_DL_BWP_t *dl_bwp = &UE->current_DL_BWP;
-    NR_UE_UL_BWP_t *ul_bwp = &UE->current_UL_BWP;
-    if (sched_ctrl->rrc_processing_timer == 0 && UE->Msg4_ACKed && sched_ctrl->next_dl_bwp_id >= 0) {
-      LOG_W(NR_MAC,
-            "%4d.%2d UE %04x Scheduling BWP switch from DL_BWP %ld to %ld and from UL_BWP %ld to %ld\n",
-            frame,
-            slot,
-            UE->rnti,
-            dl_bwp->bwp_id,
-            sched_ctrl->next_dl_bwp_id,
-            ul_bwp->bwp_id,
-            sched_ctrl->next_ul_bwp_id);
-
-      nr_mac_rrc_bwp_switch_req(module_id, frame, slot, UE->rnti, sched_ctrl->next_dl_bwp_id, sched_ctrl->next_ul_bwp_id);
-    }
-  }
-}
-
 int ul_buffer_index(int frame, int slot, int scs, int size)
 {
   const int abs_slot = frame * nr_slots_per_frame[scs] + slot;

openair2/LAYER2/NR_MAC_gNB/mac_proto.h

@@ -67,10 +67,6 @@ void nr_mac_update_timers(module_id_t module_id,
 
 void gNB_dlsch_ulsch_scheduler(module_id_t module_idP, frame_t frame_rxP, sub_frame_t slot_rxP, NR_Sched_Rsp_t *sched_info);
 
-void schedule_nr_bwp_switch(module_id_t module_id,
-                            frame_t frame,
-                            sub_frame_t slot);
-
 /* \brief main DL scheduler function. Calls a preprocessor to decide on
  * resource allocation, then "post-processes" resource allocation (nFAPI
  * messages, statistics, HARQ handling, CEs, ... */

openair2/LAYER2/NR_MAC_gNB/nr_mac_gNB.h

@@ -539,11 +539,6 @@ typedef struct NR_UE_ul_harq {
 /*! \brief scheduling control information set through an API */
 #define MAX_CSI_REPORTS 48
 typedef struct {
-  /// the next active BWP ID in DL
-  NR_BWP_Id_t next_dl_bwp_id;
-  /// the next active BWP ID in UL
-  NR_BWP_Id_t next_ul_bwp_id;
-
   /// CCE index and aggregation, should be coherent with cce_list
   NR_SearchSpace_t *search_space;
   NR_ControlResourceSet_t *coreset;

openair2/RRC/NR/L2_nr_interface.c

-/*
- * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The OpenAirInterface Software Alliance licenses this file to You under
- * the OAI Public License, Version 1.1  (the "License"); you may not use this file
- * except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.openairinterface.org/?page_id=698
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *-------------------------------------------------------------------------------
- * For more information about the OpenAirInterface (OAI) Software Alliance:
- *      contact@openairinterface.org
- */
-
-/*! \file L2_nr_interface.c
- * \brief layer 2 interface, used to support different RRC sublayer
- * \author Raymond Knopp and Navid Nikaein, WEI-TAI CHEN
- * \date 2010-2014, 2018
- * \version 1.0
- * \company Eurecom, NTUST
- * \email: raymond.knopp@eurecom.fr, kroempa@gmail.com
- */
-
-#include "platform_types.h"
-#include "nr_rrc_defs.h"
-#include "nr_rrc_extern.h"
-#include "common/utils/LOG/log.h"
-#include "common/ran_context.h"
-#include "LAYER2/NR_MAC_COMMON/nr_mac_common.h"
-#include "LAYER2/NR_MAC_COMMON/nr_mac_extern.h"
-#include "LAYER2/NR_MAC_gNB/nr_mac_gNB.h"
-#include "LAYER2/NR_MAC_gNB/mac_proto.h"
-#include "LAYER2/nr_rlc/nr_rlc_oai_api.h"
-
-#include "intertask_interface.h"
-
-#include "uper_encoder.h"
-
-#include "NR_MIB.h"
-#include "NR_BCCH-BCH-Message.h"
-#include "rrc_gNB_UE_context.h"
-#include <openair2/RRC/NR/MESSAGES/asn1_msg.h>
-#include "nr_pdcp/nr_pdcp_oai_api.h"
-
-
-extern RAN_CONTEXT_t RC;
-
-int8_t nr_mac_rrc_bwp_switch_req(const module_id_t     module_idP,
-                                 const frame_t         frameP,
-                                 const sub_frame_t     sub_frameP,
-                                 const rnti_t          rntiP,
-                                 const int             dl_bwp_id,
-                                 const int             ul_bwp_id) {
-  rrc_gNB_ue_context_t *ue_context_p = rrc_gNB_get_ue_context_by_rnti(RC.nrrrc[module_idP], rntiP);
-
-  protocol_ctxt_t ctxt;
-  PROTOCOL_CTXT_SET_BY_MODULE_ID(&ctxt, module_idP, GNB_FLAG_YES, rntiP, frameP, sub_frameP, 0);
-  nr_rrc_reconfiguration_req(ue_context_p, &ctxt, dl_bwp_id, ul_bwp_id);
-
-  return 0;
-}

openair2/RRC/NR/nr_rrc_proto.h

@@ -110,13 +110,6 @@ void *rrc_gnb_task(void *args_p);
    \ *reOffset Pointer to RE Offset Value */
 void rrc_config_dl_ptrs_params(NR_BWP_Downlink_t *bwp, long *ptrsNrb, long *ptrsMcs, long *epre_Ratio, long *reOffset);
 
-int8_t nr_mac_rrc_bwp_switch_req(const module_id_t     module_idP,
-                                 const frame_t         frameP,
-                                 const sub_frame_t     sub_frameP,
-                                 const rnti_t          rntiP,
-                                 const int             dl_bwp_id,
-                                 const int             ul_bwp_id);
-
 int nr_rrc_reconfiguration_req(rrc_gNB_ue_context_t         *const ue_context_pP,
                                protocol_ctxt_t              *const ctxt_pP,
                                const int                    dl_bwp_id,