eNB_scheduler.c 16.7 KB
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/*******************************************************************************
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    OpenAirInterface
    Copyright(c) 1999 - 2014 Eurecom
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    OpenAirInterface is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
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    OpenAirInterface is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
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    You should have received a copy of the GNU General Public License
    along with OpenAirInterface.The full GNU General Public License is
    included in this distribution in the file called "COPYING". If not,
    see <http://www.gnu.org/licenses/>.
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  Contact Information
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  OpenAirInterface Admin: openair_admin@eurecom.fr
  OpenAirInterface Tech : openair_tech@eurecom.fr
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  OpenAirInterface Dev  : openair4g-devel@lists.eurecom.fr
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  Address      : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
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*******************************************************************************/
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/*! \file eNB_scheduler.c
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 * \brief eNB scheduler top level function operates on per subframe basis
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 * \author  Navid Nikaein and Raymond Knopp
 * \date 2010 - 2014
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 * \email: navid.nikaein@eurecom.fr
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 * \version 0.5
 * @ingroup _mac
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 */
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#include "assertions.h"
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#include "PHY/defs.h"
#include "PHY/extern.h"

#include "SCHED/defs.h"
#include "SCHED/extern.h"

#include "LAYER2/MAC/defs.h"
#include "LAYER2/MAC/extern.h"
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#include "LAYER2/MAC/proto.h"
#include "UTIL/LOG/log.h"
#include "UTIL/LOG/vcd_signal_dumper.h"
#include "UTIL/OPT/opt.h"
#include "OCG.h"
#include "OCG_extern.h"
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#include "RRC/LITE/extern.h"
#include "RRC/L2_INTERFACE/openair_rrc_L2_interface.h"
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//#include "LAYER2/MAC/pre_processor.c"
#include "pdcp.h"
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#if defined(ENABLE_ITTI)
# include "intertask_interface.h"
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#endif

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#define ENABLE_MAC_PAYLOAD_DEBUG
#define DEBUG_eNB_SCHEDULER 1
//#define DEBUG_HEADER_PARSING 1
//#define DEBUG_PACKET_TRACE 1
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/*
  #ifndef USER_MODE
  #define msg debug_msg
  #endif
 */
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void eNB_dlsch_ulsch_scheduler(module_id_t module_idP,uint8_t cooperation_flag, frame_t frameP, sub_frame_t subframeP)  //, int calibration_flag) {
{
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  int mbsfn_status[MAX_NUM_CCs];
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  protocol_ctxt_t   ctxt;
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#ifdef EXMIMO
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  int ret;
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#endif
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#if defined(ENABLE_ITTI)
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  MessageDef   *msg_p;
  const char   *msg_name;
  instance_t    instance;
  int           result;
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#endif
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  DCI_PDU *DCI_pdu[MAX_NUM_CCs];
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  int CC_id,i,next_i;
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  UE_list_t *UE_list=&eNB_mac_inst[module_idP].UE_list;
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  rnti_t rnti;
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  LOG_D(MAC,"[eNB %d] Frame %d, Subframe %d, entering MAC scheduler (UE_list->head %d)\n",module_idP, frameP, subframeP,UE_list->head);
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  start_meas(&eNB_mac_inst[module_idP].eNB_scheduler);
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  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_ENB_DLSCH_ULSCH_SCHEDULER,VCD_FUNCTION_IN);
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  for (CC_id=0; CC_id<MAX_NUM_CCs; CC_id++) {
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    DCI_pdu[CC_id] = &eNB_mac_inst[module_idP].common_channels[CC_id].DCI_pdu;
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    DCI_pdu[CC_id]->nCCE=0;
    DCI_pdu[CC_id]->num_pdcch_symbols=1;
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    mbsfn_status[CC_id]=0;
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    // clear vrb_map
    memset(eNB_mac_inst[module_idP].common_channels[CC_id].vrb_map,0,100);
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  }
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  // refresh UE list based on UEs dropped by PHY in previous subframe
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  i = UE_list->head;

  while (i>=0) {
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    rnti = UE_RNTI(module_idP, i);
    CC_id = UE_PCCID(module_idP, i);
    LOG_D(MAC,"UE %d: rnti %x (%p)\n", i, rnti,
          mac_xface->get_eNB_UE_stats(module_idP, CC_id, rnti));
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    next_i= UE_list->next[i];
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    // increment this, it is cleared when we receive an sdu
    eNB_mac_inst[module_idP].UE_list.UE_sched_ctrl[i].ul_inactivity_timer++;

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    if (mac_xface->get_eNB_UE_stats(module_idP, CC_id, rnti)==NULL) {
      mac_remove_ue(module_idP, i, frameP, subframeP);
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    }
    i = next_i;
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  }
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#if defined(ENABLE_ITTI)
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  do {
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    // Checks if a message has been sent to MAC sub-task
    itti_poll_msg (TASK_MAC_ENB, &msg_p);
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    if (msg_p != NULL) {
      msg_name = ITTI_MSG_NAME (msg_p);
      instance = ITTI_MSG_INSTANCE (msg_p);
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      switch (ITTI_MSG_ID(msg_p)) {
      case MESSAGE_TEST:
        LOG_D(MAC, "Received %s\n", ITTI_MSG_NAME(msg_p));
        break;
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      case RRC_MAC_BCCH_DATA_REQ:
        LOG_D(MAC, "Received %s from %s: instance %d, frameP %d, eNB_index %d\n",
              msg_name, ITTI_MSG_ORIGIN_NAME(msg_p), instance,
              RRC_MAC_BCCH_DATA_REQ (msg_p).frame, RRC_MAC_BCCH_DATA_REQ (msg_p).enb_index);
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        // TODO process BCCH data req.
        break;
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      case RRC_MAC_CCCH_DATA_REQ:
        LOG_D(MAC, "Received %s from %s: instance %d, frameP %d, eNB_index %d\n",
              msg_name, ITTI_MSG_ORIGIN_NAME(msg_p), instance,
              RRC_MAC_CCCH_DATA_REQ (msg_p).frame, RRC_MAC_CCCH_DATA_REQ (msg_p).enb_index);
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        // TODO process CCCH data req.
        break;
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#ifdef Rel10

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      case RRC_MAC_MCCH_DATA_REQ:
        LOG_D(MAC, "Received %s from %s: instance %d, frameP %d, eNB_index %d, mbsfn_sync_area %d\n",
              msg_name, ITTI_MSG_ORIGIN_NAME(msg_p), instance,
              RRC_MAC_MCCH_DATA_REQ (msg_p).frame, RRC_MAC_MCCH_DATA_REQ (msg_p).enb_index, RRC_MAC_MCCH_DATA_REQ (msg_p).mbsfn_sync_area);
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        // TODO process MCCH data req.
        break;
#endif
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      default:
        LOG_E(MAC, "Received unexpected message %s\n", msg_name);
        break;
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      }
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      result = itti_free (ITTI_MSG_ORIGIN_ID(msg_p), msg_p);
      AssertFatal (result == EXIT_SUCCESS, "Failed to free memory (%d)!\n", result);
    }
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  } while(msg_p != NULL);
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#endif

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  // clear DCI and BCCH contents before scheduling
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  for (CC_id=0; CC_id<MAX_NUM_CCs; CC_id++) {
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    DCI_pdu[CC_id]->Num_common_dci  = 0;
    DCI_pdu[CC_id]->Num_ue_spec_dci = 0;
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#ifdef Rel10
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    eNB_mac_inst[module_idP].common_channels[CC_id].mcch_active =0;
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#endif
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    eNB_mac_inst[module_idP].frame    = frameP;
    eNB_mac_inst[module_idP].subframe = subframeP;
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  }
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  //if (subframeP%5 == 0)
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  //#ifdef EXMIMO
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  PROTOCOL_CTXT_SET_BY_MODULE_ID(&ctxt, module_idP, ENB_FLAG_YES, NOT_A_RNTI, frameP, 0,module_idP);
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  pdcp_run(&ctxt);
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  //#endif
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  // check HO
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  rrc_rx_tx(&ctxt,
            0, // eNB index, unused in eNB
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            CC_id);
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#ifdef Rel10
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  for (CC_id=0; CC_id<MAX_NUM_CCs; CC_id++) {
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    if (eNB_mac_inst[module_idP].common_channels[CC_id].MBMS_flag >0) {
      start_meas(&eNB_mac_inst[module_idP].schedule_mch);
      mbsfn_status[CC_id] = schedule_MBMS(module_idP,CC_id,frameP,subframeP);
      stop_meas(&eNB_mac_inst[module_idP].schedule_mch);
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    }
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  }
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#endif
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  // refresh UE list based on UEs dropped by PHY in previous subframe
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  /*
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  i=UE_list->head;
  while (i>=0) {
    next_i = UE_list->next[i];
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    LOG_T(MAC,"UE %d : rnti %x, stats %p\n",i,UE_RNTI(module_idP,i),mac_xface->get_eNB_UE_stats(module_idP,0,UE_RNTI(module_idP,i)));
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    if (mac_xface->get_eNB_UE_stats(module_idP,0,UE_RNTI(module_idP,i))==NULL) {
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      mac_remove_ue(module_idP,i,frameP);
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    }
    i=next_i;
  }
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  */
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  switch (subframeP) {
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  case 0:
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    // FDD/TDD Schedule Downlink RA transmissions (RA response, Msg4 Contention resolution)
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    // Schedule ULSCH for FDD or subframeP 4 (TDD config 0,3,6)
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    // Schedule Normal DLSCH
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    schedule_RA(module_idP,frameP,subframeP,2);

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    if (mac_xface->lte_frame_parms->frame_type == FDD) {  //FDD
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      schedule_ulsch(module_idP,frameP,cooperation_flag,0,4);//,calibration_flag);
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    } else if  ((mac_xface->lte_frame_parms->tdd_config == TDD) || //TDD
                (mac_xface->lte_frame_parms->tdd_config == 3) ||
                (mac_xface->lte_frame_parms->tdd_config == 6)) {
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      //schedule_ulsch(module_idP,frameP,cooperation_flag,subframeP,4);//,calibration_flag);
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    }
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    schedule_ue_spec(module_idP,frameP,subframeP,mbsfn_status);
    fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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    break;

  case 1:
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    // TDD, schedule UL for subframeP 7 (TDD config 0,1) / subframeP 8 (TDD Config 6)
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    // FDD, schedule normal UL/DLSCH
    if (mac_xface->lte_frame_parms->frame_type == TDD) { // TDD
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      switch (mac_xface->lte_frame_parms->tdd_config) {
      case 0:
      case 1:
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        schedule_ulsch(module_idP,frameP,cooperation_flag,subframeP,7);
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        fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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        break;

      case 6:
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        schedule_ulsch(module_idP,frameP,cooperation_flag,subframeP,8);
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        fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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        break;

      default:
        break;
      }
    } else { //FDD
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      schedule_ulsch(module_idP,frameP,cooperation_flag,1,5);
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      schedule_ue_spec(module_idP,frameP,subframeP,mbsfn_status);
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      fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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    }
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    break;
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  case 2:
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    // TDD, nothing
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    // FDD, normal UL/DLSCH
    if (mac_xface->lte_frame_parms->frame_type == FDD) {  //FDD
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      schedule_ulsch(module_idP,frameP,cooperation_flag,2,6);
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      schedule_ue_spec(module_idP,frameP,subframeP,mbsfn_status);
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      fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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    }
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    break;

  case 3:
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    // TDD Config 2, ULSCH for subframeP 7
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    // TDD Config 2/5 normal DLSCH
    // FDD, normal UL/DLSCH
    if (mac_xface->lte_frame_parms->frame_type == TDD) {
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      switch (mac_xface->lte_frame_parms->tdd_config) {
      case 2:
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        schedule_ulsch(module_idP,frameP,cooperation_flag,subframeP,7);
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        // no break here!
      case 5:
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        schedule_ue_spec(module_idP,frameP,subframeP,mbsfn_status);
        fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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        break;

      default:
        break;
      }
    } else { //FDD
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      schedule_ulsch(module_idP,frameP,cooperation_flag,3,7);
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      schedule_ue_spec(module_idP,frameP,subframeP,mbsfn_status);
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      fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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    }
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    break;
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  case 4:
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    // TDD Config 1, ULSCH for subframeP 8
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    // TDD Config 1/2/4/5 DLSCH
    // FDD UL/DLSCH
    if (mac_xface->lte_frame_parms->frame_type == 1) { // TDD
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      switch (mac_xface->lte_frame_parms->tdd_config) {
      case 1:
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        //        schedule_RA(module_idP,frameP,subframeP);
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        schedule_ulsch(module_idP,frameP,cooperation_flag,subframeP,8);
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        // no break here!
      case 2:

        // no break here!
      case 4:

        // no break here!
      case 5:
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        schedule_ue_spec(module_idP,frameP,subframeP,mbsfn_status);
        fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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        break;

      default:
        break;
      }
    } else {
      if (mac_xface->lte_frame_parms->frame_type == FDD) {  //FDD

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	schedule_ulsch(module_idP, frameP, cooperation_flag, 4, 8);
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	schedule_ue_spec(module_idP, frameP, subframeP,  mbsfn_status);
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        fill_DLSCH_dci(module_idP, frameP, subframeP,   mbsfn_status);
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      }
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    }
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    break;

  case 5:
    // TDD/FDD Schedule SI
    // TDD Config 0,6 ULSCH for subframes 9,3 resp.
    // TDD normal DLSCH
    // FDD normal UL/DLSCH
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    schedule_SI(module_idP,frameP,subframeP);
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    //schedule_RA(module_idP,frameP,subframeP,5);
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    if (mac_xface->lte_frame_parms->frame_type == FDD) {
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      schedule_RA(module_idP,frameP,subframeP,1);
      schedule_ulsch(module_idP,frameP,cooperation_flag,5,9);
      schedule_ue_spec(module_idP, frameP, subframeP,  mbsfn_status);
      fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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    } else if ((mac_xface->lte_frame_parms->tdd_config == 0) || // TDD Config 0
               (mac_xface->lte_frame_parms->tdd_config == 6)) { // TDD Config 6
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      //schedule_ulsch(module_idP,cooperation_flag,subframeP);
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      fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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    } else {
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      schedule_ue_spec(module_idP,frameP,subframeP,mbsfn_status);
      fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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    }
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    break;

  case 6:
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    // TDD Config 0,1,6 ULSCH for subframes 2,3
    // TDD Config 3,4,5 Normal DLSCH
    // FDD normal ULSCH/DLSCH
    if (mac_xface->lte_frame_parms->frame_type == TDD) { // TDD
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      switch (mac_xface->lte_frame_parms->tdd_config) {
      case 0:
        break;

      case 1:
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        schedule_ulsch(module_idP,frameP,cooperation_flag,subframeP,2);
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        //  schedule_ue_spec(module_idP,frameP,subframeP,mbsfn_status);
        fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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        break;

      case 6:
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        schedule_ulsch(module_idP,frameP,cooperation_flag,subframeP,3);
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        //  schedule_ue_spec(module_idP,frameP,subframeP,mbsfn_status);
        fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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        break;

      case 5:
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        schedule_RA(module_idP,frameP,subframeP,2);
        schedule_ue_spec(module_idP,frameP,subframeP,mbsfn_status);
        fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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        break;

      case 3:
      case 4:
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        schedule_ue_spec(module_idP,frameP,subframeP,mbsfn_status);
        fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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        break;

      default:
        break;
      }
    } else { //FDD
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      schedule_ulsch(module_idP,frameP,cooperation_flag,6,0);
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      schedule_ue_spec(module_idP,frameP,subframeP,mbsfn_status);
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      fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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    }
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    break;
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  case 7:
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    // TDD Config 3,4,5 Normal DLSCH
    // FDD Normal UL/DLSCH
    if (mac_xface->lte_frame_parms->frame_type == TDD) { // TDD
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      switch (mac_xface->lte_frame_parms->tdd_config) {
      case 3:
      case 4:
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        schedule_RA(module_idP,frameP,subframeP,3);  // 3 = Msg3 subframeP, not
        schedule_ue_spec(module_idP,frameP,subframeP,mbsfn_status);
        fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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        break;

      case 5:
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        schedule_ue_spec(module_idP,frameP,subframeP,mbsfn_status);
        fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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        break;

      default:
        break;
      }
    } else { //FDD
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      schedule_ulsch(module_idP,frameP,cooperation_flag,7,1);
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      schedule_ue_spec(module_idP,frameP,subframeP,mbsfn_status);
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      fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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    }
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    break;

  case 8:
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    // TDD Config 2,3,4,5 ULSCH for subframeP 2
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    //
    // FDD Normal UL/DLSCH
    if (mac_xface->lte_frame_parms->frame_type == TDD) { // TDD
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      switch (mac_xface->lte_frame_parms->tdd_config) {
      case 2:
      case 3:
      case 4:
      case 5:

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        //  schedule_RA(module_idP,subframeP);
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        schedule_ulsch(module_idP,frameP,cooperation_flag,subframeP,2);
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        schedule_ue_spec(module_idP,frameP,subframeP,mbsfn_status);
        fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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        break;

      default:
        break;
      }
    } else { //FDD
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      schedule_ulsch(module_idP,frameP,cooperation_flag,8,2);
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      schedule_ue_spec(module_idP,frameP,subframeP,mbsfn_status);
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      fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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    }
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    break;

  case 9:
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    // TDD Config 1,3,4,6 ULSCH for subframes 3,3,3,4
    if (mac_xface->lte_frame_parms->frame_type == TDD) {
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      switch (mac_xface->lte_frame_parms->tdd_config) {
      case 1:
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        schedule_ulsch(module_idP,frameP,cooperation_flag,subframeP,3);
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        schedule_RA(module_idP,frameP,subframeP,7);  // 7 = Msg3 subframeP, not
        schedule_ue_spec(module_idP,frameP,subframeP,mbsfn_status);
        fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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        break;

      case 3:
      case 4:
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        schedule_ulsch(module_idP,frameP,cooperation_flag,subframeP,3);
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        schedule_ue_spec(module_idP,frameP,subframeP,mbsfn_status);
        fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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        break;

      case 6:
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        schedule_ulsch(module_idP,frameP,cooperation_flag,subframeP,4);
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        //schedule_RA(module_idP,frameP,subframeP);
        schedule_ue_spec(module_idP,frameP,subframeP,mbsfn_status);
        fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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        break;

      case 2:
      case 5:
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        //schedule_RA(module_idP,frameP,subframeP);
        schedule_ue_spec(module_idP,frameP,subframeP,mbsfn_status);
        fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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        break;

      default:
        break;
      }
    } else { //FDD
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      schedule_ulsch(module_idP,frameP,cooperation_flag,9,3);
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      schedule_ue_spec(module_idP,frameP,subframeP,mbsfn_status);
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      fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_status);
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    }
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    break;
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  }
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  LOG_D(MAC,"FrameP %d, subframeP %d : Scheduling CCEs\n",frameP,subframeP);
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  // Allocate CCEs for good after scheduling is done
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  for (CC_id=0;CC_id<MAX_NUM_CCs;CC_id++)
    allocate_CCEs(module_idP,CC_id,subframeP,0);
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  LOG_D(MAC,"frameP %d, subframeP %d\n",frameP,subframeP);
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  stop_meas(&eNB_mac_inst[module_idP].eNB_scheduler);
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  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_ENB_DLSCH_ULSCH_SCHEDULER,VCD_FUNCTION_OUT);
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}
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