eNB_scheduler.c 221 KB
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/*******************************************************************************

  Eurecom OpenAirInterface
  Copyright(c) 1999 - 2010 Eurecom

  This program is free software; you can redistribute it and/or modify it
  under the terms and conditions of the GNU General Public License,
  version 2, as published by the Free Software Foundation.

  This program is distributed in the hope 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.

  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

  The full GNU General Public License is included in this distribution in
  the file called "COPYING".

  Contact Information
  Openair Admin: openair_admin@eurecom.fr
  Openair Tech : openair_tech@eurecom.fr
  Forums       : http://forums.eurecom.fsr/openairinterface
  Address      : Eurecom, 2229, route des crêtes, 06560 Valbonne Sophia Antipolis, France

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 *******************************************************************************/
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/*! \file eNB_scheduler.c
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 * \brief procedures related to UE
 * \author Raymond Knopp, Navid Nikaein
 * \date 2011
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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"
#include "UTIL/LOG/log.h"
#include "UTIL/LOG/vcd_signal_dumper.h"
#include "UTIL/OPT/opt.h"
#include "OCG.h"
#include "OCG_extern.h"
#include "ARCH/CBMIMO1/DEVICE_DRIVER/extern.h"
#include "ARCH/CBMIMO1/DEVICE_DRIVER/defs.h"
#include "ARCH/CBMIMO1/DEVICE_DRIVER/from_grlib_softregs.h"

#include "RRC/LITE/extern.h"
#include "RRC/L2_INTERFACE/openair_rrc_L2_interface.h"

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//#include "LAYER2/MAC/pre_processor.c"
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#include "pdcp.h"
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#if defined(ENABLE_ITTI)
# include "intertask_interface.h"
#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

/*
  #ifndef USER_MODE
  #define msg debug_msg
  #endif
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 */
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extern inline unsigned int taus(void);


void init_ue_sched_info(void){
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  module_id_t i,j;
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  for (i=0;i<NUMBER_OF_eNB_MAX;i++){
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      for (j=0;j<NUMBER_OF_UE_MAX;j++){
          // init DL
          eNB_dlsch_info[i][j].weight           = 0;
          eNB_dlsch_info[i][j].subframe         = 0;
          eNB_dlsch_info[i][j].serving_num      = 0;
          eNB_dlsch_info[i][j].status           = S_DL_NONE;
          // init UL
          eNB_ulsch_info[i][j].subframe         = 0;
          eNB_ulsch_info[i][j].serving_num      = 0;
          eNB_ulsch_info[i][j].status           = S_UL_NONE;
      }
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  }
}

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void add_ue_ulsch_info(module_id_t module_idP, module_id_t ue_mod_idP, sub_frame_t subframeP, UE_ULSCH_STATUS status){
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  eNB_ulsch_info[module_idP][ue_mod_idP].rnti             = find_UE_RNTI(module_idP,ue_mod_idP);
  eNB_ulsch_info[module_idP][ue_mod_idP].subframe         = subframeP;
  eNB_ulsch_info[module_idP][ue_mod_idP].status           = status;
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  eNB_ulsch_info[module_idP][ue_mod_idP].serving_num++;
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}
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void add_ue_dlsch_info(module_id_t module_idP, module_id_t ue_mod_idP, sub_frame_t subframeP, UE_DLSCH_STATUS status){
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  eNB_dlsch_info[module_idP][ue_mod_idP].rnti             = find_UE_RNTI(module_idP,ue_mod_idP);
  //  eNB_dlsch_info[module_idP][ue_mod_idP].weight           = weight;
  eNB_dlsch_info[module_idP][ue_mod_idP].subframe         = subframeP;
  eNB_dlsch_info[module_idP][ue_mod_idP].status           = status;
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  eNB_dlsch_info[module_idP][ue_mod_idP].serving_num++;
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}

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unsigned char get_ue_weight(module_id_t module_idP, module_id_t ue_mod_idP){
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  return(eNB_dlsch_info[module_idP][ue_mod_idP].weight);
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}

// return is rnti ???
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module_id_t schedule_next_ulue(module_id_t module_idP, module_id_t ue_mod_idP, sub_frame_t subframeP){
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  module_id_t next_ue;
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  // first phase: scheduling for ACK
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  switch (subframeP) {
  // scheduling for subframeP 2: for scheduled user during subframeP 5 and 6
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  case 8:
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    if  ((eNB_dlsch_info[module_idP][ue_mod_idP].status == S_DL_SCHEDULED) &&
        (eNB_dlsch_info[module_idP][ue_mod_idP].subframe == 5 || eNB_dlsch_info[module_idP][ue_mod_idP].subframe == 6)){
        // set the downlink status
        eNB_dlsch_info[module_idP][ue_mod_idP].status = S_DL_BUFFERED;
        return ue_mod_idP;
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    }
    break;
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    // scheduling for subframeP 3: for scheduled user during subframeP 7 and 8
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  case 9:
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    if  ((eNB_dlsch_info[module_idP][ue_mod_idP].status == S_DL_SCHEDULED) &&
        (eNB_dlsch_info[module_idP][ue_mod_idP].subframe == 7 || eNB_dlsch_info[module_idP][ue_mod_idP].subframe == 8)){
        eNB_dlsch_info[module_idP][ue_mod_idP].status = S_DL_BUFFERED;
        return ue_mod_idP;
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    }
    break;
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    // scheduling UL subframeP 4: for scheduled user during subframeP 9 and 0
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  case 0 :
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    if  ((eNB_dlsch_info[module_idP][ue_mod_idP].status == S_DL_SCHEDULED) &&
        (eNB_dlsch_info[module_idP][ue_mod_idP].subframe == 9 || eNB_dlsch_info[module_idP][ue_mod_idP].subframe == 0)){
        eNB_dlsch_info[module_idP][ue_mod_idP].status = S_DL_BUFFERED;
        return ue_mod_idP;
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    }
    break;
  default:
    break;
  }

  // second phase
  for (next_ue=0; next_ue <NUMBER_OF_UE_MAX; next_ue++ ){

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      if  (eNB_ulsch_info[module_idP][next_ue].status == S_UL_WAITING )
        return next_ue;
      else if (eNB_ulsch_info[module_idP][next_ue].status == S_UL_SCHEDULED){
          eNB_ulsch_info[module_idP][next_ue].status = S_UL_BUFFERED;
      }
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  }
  for (next_ue=0; next_ue <NUMBER_OF_UE_MAX; next_ue++ ){
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      if (eNB_ulsch_info[module_idP][next_ue].status != S_UL_NONE )// do this just for active UEs
        eNB_ulsch_info[module_idP][next_ue].status = S_UL_WAITING;
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  }
  next_ue = 0;
  return next_ue;

}

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module_id_t schedule_next_dlue(module_id_t module_idP, sub_frame_t subframeP){
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  module_id_t next_ue;
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  for (next_ue=0; next_ue < NUMBER_OF_UE_MAX; next_ue++ ){
      if  (eNB_dlsch_info[module_idP][next_ue].status == S_DL_WAITING)
        return next_ue;
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  }
  for (next_ue=0; next_ue <NUMBER_OF_UE_MAX; next_ue++ )
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    if  (eNB_dlsch_info[module_idP][next_ue].status == S_DL_BUFFERED) {
        eNB_dlsch_info[module_idP][next_ue].status = S_DL_WAITING;
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    }
  // next_ue = -1;
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  return (module_id_t)(-1);//next_ue;
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}

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void initiate_ra_proc(module_id_t module_idP, frame_t frameP, u16 preamble_index,s16 timing_offset,u8 sect_id,sub_frame_t subframeP,u8 f_id) {
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  u8 i;

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  LOG_I(MAC,"[eNB %d][RAPROC] Frame %d Initiating RA procedure for preamble index %d\n",module_idP,frameP,preamble_index);
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  for (i=0;i<NB_RA_PROC_MAX;i++) {
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      if (eNB_mac_inst[module_idP].RA_template[i].RA_active==FALSE) {
          eNB_mac_inst[module_idP].RA_template[i].RA_active=TRUE;
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          eNB_mac_inst[module_idP].RA_template[i].generate_rar=1;
          eNB_mac_inst[module_idP].RA_template[i].generate_Msg4=0;
          eNB_mac_inst[module_idP].RA_template[i].wait_ack_Msg4=0;
          eNB_mac_inst[module_idP].RA_template[i].timing_offset=timing_offset;
          // Put in random rnti (to be replaced with proper procedure!!)
          eNB_mac_inst[module_idP].RA_template[i].rnti = taus();
          eNB_mac_inst[module_idP].RA_template[i].RA_rnti = 1+subframeP+(10*f_id);
          eNB_mac_inst[module_idP].RA_template[i].preamble_index = preamble_index;
          LOG_D(MAC,"[eNB %d][RAPROC] Frame %d Activating RAR generation for process %d, rnti %x, RA_active %d\n",
              module_idP,frameP,i,eNB_mac_inst[module_idP].RA_template[i].rnti,
              eNB_mac_inst[module_idP].RA_template[i].RA_active);

          return;
      }
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  }
}

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void cancel_ra_proc(module_id_t module_idP, frame_t frameP, rnti_t rnti) {
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  unsigned char i;
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  LOG_I(MAC,"[eNB %d][RAPROC] Frame %d Cancelling RA procedure for UE rnti %x\n",module_idP,frameP,rnti);
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  for (i=0;i<NB_RA_PROC_MAX;i++) {
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      if (rnti == eNB_mac_inst[module_idP].RA_template[i].rnti) {
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          eNB_mac_inst[module_idP].RA_template[i].RA_active=FALSE;
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          eNB_mac_inst[module_idP].RA_template[i].generate_rar=0;
          eNB_mac_inst[module_idP].RA_template[i].generate_Msg4=0;
          eNB_mac_inst[module_idP].RA_template[i].wait_ack_Msg4=0;
          eNB_mac_inst[module_idP].RA_template[i].timing_offset=0;
          eNB_mac_inst[module_idP].RA_template[i].RRC_timer=20;
          eNB_mac_inst[module_idP].RA_template[i].rnti = 0;
      }
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  }
}

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void terminate_ra_proc(module_id_t module_idP,frame_t frameP,rnti_t rnti,unsigned char *msg3, u16 msg3_len) {
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  unsigned char rx_ces[MAX_NUM_CE],num_ce,num_sdu,i,*payload_ptr;
  unsigned char rx_lcids[NB_RB_MAX];
  u16 rx_lengths[NB_RB_MAX];
  s8 UE_id;

  LOG_I(MAC,"[eNB %d][RAPROC] Frame %d, Received msg3 %x.%x.%x.%x.%x.%x, Terminating RA procedure for UE rnti %x\n",
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      module_idP,frameP,
      msg3[3],msg3[4],msg3[5],msg3[6],msg3[7], msg3[8], rnti);
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  for (i=0;i<NB_RA_PROC_MAX;i++) {
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      LOG_D(MAC,"[RAPROC] Checking proc %d : rnti (%x, %x), active %d\n",i,
          eNB_mac_inst[module_idP].RA_template[i].rnti, rnti,
          eNB_mac_inst[module_idP].RA_template[i].RA_active);
      if ((eNB_mac_inst[module_idP].RA_template[i].rnti==rnti) &&
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          (eNB_mac_inst[module_idP].RA_template[i].RA_active==TRUE)) {
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          payload_ptr = parse_ulsch_header(msg3,&num_ce,&num_sdu,rx_ces,rx_lcids,rx_lengths,msg3_len);
          LOG_D(MAC,"[eNB %d][RAPROC] Frame %d Received CCCH: length %d, offset %d\n",
              module_idP,frameP,rx_lengths[0],payload_ptr-msg3);
          if ((num_ce == 0) && (num_sdu==1) && (rx_lcids[0] == CCCH)) { // This is an RRCConnectionRequest/Restablishment
              memcpy(&eNB_mac_inst[module_idP].RA_template[i].cont_res_id[0],payload_ptr,6);
              LOG_D(MAC,"[eNB %d][RAPROC] Frame %d Received CCCH: length %d, offset %d\n",
                  module_idP,frameP,rx_lengths[0],payload_ptr-msg3);
              UE_id=add_new_ue(module_idP,eNB_mac_inst[module_idP].RA_template[i].rnti);
              if (UE_id==-1) {
                  mac_xface->macphy_exit("[MAC][eNB] Max user count reached\n");
              }
              else {
                  LOG_I(MAC,"[eNB %d][RAPROC] Frame %d Added user with rnti %x => UE %d\n",
                      module_idP,frameP,eNB_mac_inst[module_idP].RA_template[i].rnti,UE_id);
              }

              if (Is_rrc_registered == 1)
                mac_rrc_data_ind(module_idP,frameP,CCCH,(u8 *)payload_ptr,rx_lengths[0],1,module_idP,0);
              // add_user.  This is needed to have the rnti for configuring UE (PHY). The UE is removed if RRC
              // doesn't provide a CCCH SDU

          }
          else if (num_ce >0) {  // handle msg3 which is not RRCConnectionRequest
              //	process_ra_message(msg3,num_ce,rx_lcids,rx_ces);
          }

          eNB_mac_inst[module_idP].RA_template[i].generate_Msg4 = 1;
          eNB_mac_inst[module_idP].RA_template[i].wait_ack_Msg4 = 0;

          return;
      } // if process is active
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  } // loop on RA processes
}

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DCI_PDU *get_dci_sdu(module_id_t module_idP, frame_t frameP, sub_frame_t subframeP) {
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  return(&eNB_mac_inst[module_idP].DCI_pdu);
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}

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module_id_t find_UE_id(module_id_t module_idP, rnti_t rnti) {
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  module_id_t ue_mod_id;
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  for (ue_mod_id=0;ue_mod_id<NUMBER_OF_UE_MAX;ue_mod_id++) {
      if (eNB_mac_inst[module_idP].UE_template[ue_mod_id].rnti==rnti) {
          return(ue_mod_id);
      }
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  }
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  return(module_id_t)(-1);
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}

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rnti_t find_UE_RNTI(module_id_t module_idP, module_id_t ue_mod_idP) {
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  return (eNB_mac_inst[module_idP].UE_template[ue_mod_idP].rnti);
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}
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boolean_t is_UE_active(module_id_t module_idP, module_id_t ue_mod_idP ){
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  if (eNB_mac_inst[module_idP].UE_template[ue_mod_idP].rnti !=0 )
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    return TRUE;
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  else
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    return FALSE ;
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}
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u8 find_active_UEs(module_id_t module_idP){
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  module_id_t        ue_mod_id      = 0;
  rnti_t        rnti         = 0;
  u8            nb_active_ue = 0;
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  for (ue_mod_id=0;ue_mod_id<NUMBER_OF_UE_MAX;ue_mod_id++) {
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      if (((rnti=eNB_mac_inst[module_idP].UE_template[ue_mod_id].rnti) !=0)&&(eNB_mac_inst[module_idP].UE_template[ue_mod_id].ul_active==TRUE)){
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          if (mac_xface->get_eNB_UE_stats(module_idP,rnti) != NULL){ // check at the phy enb_ue state for this rnti
              nb_active_ue++;
          }
          else { // this ue is removed at the phy => remove it at the mac as well
              mac_remove_ue(module_idP, ue_mod_id);
          }
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      }
  }
  return(nb_active_ue);
}

// function for determining which active ue should be granted resources in uplink based on BSR+QoS
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u8 find_ulgranted_UEs(module_id_t module_idP){
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  // all active users should be granted
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  return(find_active_UEs(module_idP));
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}

// function for determining which active ue should be granted resources in downlink based on CQI, SI, and BSR
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u8 find_dlgranted_UEs(module_id_t module_idP){
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  // all active users should be granted
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  return(find_active_UEs(module_idP));
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}
// get aggregatiob form phy for a give UE
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unsigned char process_ue_cqi (module_id_t module_idP, module_id_t ue_mod_idP) {
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  unsigned char aggregation=2;
  // check the MCS and SNR and set the aggregation accordingly
  return aggregation;
}
#ifdef CBA
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u8 find_num_active_UEs_in_cbagroup(module_id_t module_idP, unsigned char group_id){
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  module_id_t    UE_id;
  rnti_t    rnti;
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  unsigned char nb_ue_in_pusch=0;
  LTE_eNB_UE_stats* eNB_UE_stats;
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  for (UE_id=group_id;UE_id<NUMBER_OF_UE_MAX;UE_id+=eNB_mac_inst[module_idP].num_active_cba_groups) {

      if (((rnti=eNB_mac_inst[module_idP].UE_template[UE_id].rnti) !=0) &&
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          (eNB_mac_inst[module_idP].UE_template[UE_id].ul_active==TRUE)    &&
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          (mac_get_rrc_status(module_idP,1,UE_id) > RRC_CONNECTED)){
          //  && (UE_is_to_be_scheduled(module_idP,UE_id)))
          // check at the phy enb_ue state for this rnti
          if ((eNB_UE_stats= mac_xface->get_eNB_UE_stats(module_idP,rnti)) != NULL){
              if ((eNB_UE_stats->mode == PUSCH) && (UE_is_to_be_scheduled(module_idP,UE_id) == 0)){
                  nb_ue_in_pusch++;
              }
          }
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      }
  }
  return(nb_ue_in_pusch);
}
#endif 
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s8 add_new_ue(module_id_t enb_mod_idP, rnti_t rntiP) {
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  module_id_t ue_mod_id;
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  int         j;
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  for (ue_mod_id=0;ue_mod_id<NUMBER_OF_UE_MAX;ue_mod_id++) {
      if (eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_id].rnti == 0) {
          eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_id].rnti = rntiP;
          for (j=0;j<8;j++) {
              eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_id].oldNDI[j]    = 0;
              eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_id].oldNDI_UL[j] = 0;
          }
          eNB_ulsch_info[enb_mod_idP][ue_mod_id].status = S_UL_WAITING;
          eNB_dlsch_info[enb_mod_idP][ue_mod_id].status = S_UL_WAITING;
          LOG_D(MAC,"[eNB] Add UE_id %d : rnti %x\n",ue_mod_id,eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_id].rnti);
          return((s8)ue_mod_id);
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      }
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  }
  return(-1);
}

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s8 mac_remove_ue(module_id_t enb_mod_idP, module_id_t ue_mod_idP) {
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  LOG_I(MAC,"Removing UE %d (rnti %x)\n",ue_mod_idP,eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_idP].rnti);
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  // clear all remaining pending transmissions
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  eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_idP].bsr_info[LCGID0]  = 0;
  eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_idP].bsr_info[LCGID1]  = 0;
  eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_idP].bsr_info[LCGID2]  = 0;
  eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_idP].bsr_info[LCGID3]  = 0;
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  eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_idP].ul_SR             = 0;
  eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_idP].rnti              = 0;
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  eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_idP].ul_active         = FALSE;
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  eNB_ulsch_info[enb_mod_idP][ue_mod_idP].rnti                        = 0;
  eNB_ulsch_info[enb_mod_idP][ue_mod_idP].status                      = S_UL_NONE;
  eNB_dlsch_info[enb_mod_idP][ue_mod_idP].rnti                        = 0;
  eNB_dlsch_info[enb_mod_idP][ue_mod_idP].status                      = S_DL_NONE;
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  rrc_eNB_free_UE_index(enb_mod_idP,ue_mod_idP);
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  return(1);
}

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unsigned char *get_dlsch_sdu(module_id_t module_idP, frame_t frameP, rnti_t rntiP, u8 TBindex) {
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  module_id_t ue_mod_id;
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  if (rntiP==SI_RNTI) {
      LOG_D(MAC,"[eNB %d] Frame %d Get DLSCH sdu for BCCH \n",module_idP,frameP);
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      return((unsigned char *)&eNB_mac_inst[module_idP].BCCH_pdu.payload[0]);
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  }
  else {

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      ue_mod_id = find_UE_id(module_idP,rntiP);
      LOG_D(MAC,"[eNB %d] Frame %d  Get DLSCH sdu for rnti %x => UE_id %d\n",module_idP,frameP,rntiP,ue_mod_id);
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      return((unsigned char *)&eNB_mac_inst[module_idP].DLSCH_pdu[ue_mod_id][TBindex].payload[0]);
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  }

}

unsigned char *parse_ulsch_header(unsigned char *mac_header,
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    unsigned char *num_ce,
    unsigned char *num_sdu,
    unsigned char *rx_ces,
    unsigned char *rx_lcids,
    unsigned short *rx_lengths,
    unsigned short tb_length) {
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  unsigned char not_done=1,num_ces=0,num_sdus=0,lcid,num_sdu_cnt;
  unsigned char *mac_header_ptr = mac_header;
  unsigned short length, ce_len=0;

  while (not_done==1) {

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      if (((SCH_SUBHEADER_FIXED *)mac_header_ptr)->E == 0)
        not_done = 0;

      lcid = ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->LCID;
      if (lcid < EXTENDED_POWER_HEADROOM) {
          if (not_done==0) { // last MAC SDU, length is implicit
              mac_header_ptr++;
              length = tb_length-(mac_header_ptr-mac_header)-ce_len;
              for (num_sdu_cnt=0; num_sdu_cnt < num_sdus ; num_sdu_cnt++)
                length -= rx_lengths[num_sdu_cnt];
          }
          else {
              if (((SCH_SUBHEADER_SHORT *)mac_header_ptr)->F == 0) {
                  length = ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->L;
                  mac_header_ptr += 2;//sizeof(SCH_SUBHEADER_SHORT);
              }
              else { // F = 1
                  length = ((((SCH_SUBHEADER_LONG *)mac_header_ptr)->L_MSB & 0x7f ) << 8 ) | (((SCH_SUBHEADER_LONG *)mac_header_ptr)->L_LSB & 0xff);
                  mac_header_ptr += 3;//sizeof(SCH_SUBHEADER_LONG);
              }
          }
          LOG_D(MAC,"[eNB] sdu %d lcid %d tb_length %d length %d (offset now %d)\n",
              num_sdus,lcid,tb_length, length,mac_header_ptr-mac_header);
          rx_lcids[num_sdus] = lcid;
          rx_lengths[num_sdus] = length;
          num_sdus++;
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      }
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      else {  // This is a control element subheader POWER_HEADROOM, BSR and CRNTI
          if (lcid == SHORT_PADDING) {
              mac_header_ptr++;
          }
          else {
              rx_ces[num_ces] = lcid;
              num_ces++;
              mac_header_ptr++;
              if (lcid==LONG_BSR)
                ce_len+=4;
              else if (lcid==CRNTI)
                ce_len+=2;
              else if ((lcid==POWER_HEADROOM) || (lcid==TRUNCATED_BSR)|| (lcid== SHORT_BSR))
                ce_len++;
          }
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      }
  }
  *num_ce = num_ces;
  *num_sdu = num_sdus;

  return(mac_header_ptr);
}

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void SR_indication(module_id_t enb_mod_idP, frame_t frameP, rnti_t rntiP, sub_frame_t subframeP) {
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  smodule_id_t ue_mod_id = find_UE_id(enb_mod_idP, rntiP);
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  if (ue_mod_id >= 0) {
      LOG_D(MAC,"[eNB %d][SR %x] Frame %d subframeP %d Signaling SR for UE %d \n",enb_mod_idP,rntiP,frameP,subframeP, ue_mod_id);
      eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_id].ul_SR = 1;
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      eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_id].ul_active = TRUE;
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  } else {
      AssertFatal(0, "find_UE_id(%u,rnti %d) not found", enb_mod_idP, rntiP);
  }
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}

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void rx_sdu(module_id_t enb_mod_idP,frame_t frameP,rnti_t rntiP,u8 *sdu, u16 sdu_len) {
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  unsigned char  rx_ces[MAX_NUM_CE],num_ce,num_sdu,i,*payload_ptr;
  unsigned char  rx_lcids[NB_RB_MAX];
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  unsigned short rx_lengths[NB_RB_MAX];
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  module_id_t         ue_mod_id = find_UE_id(enb_mod_idP,rntiP);
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  int ii,j;
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  start_meas(&eNB_mac_inst[enb_mod_idP].rx_ulsch_sdu);
  
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  for(ii=0; ii<NB_RB_MAX; ii++) rx_lengths[ii] = 0;
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  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_RX_SDU,1);

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  eNB_mac_inst[enb_mod_idP].eNB_UE_stats[ue_mod_id].total_pdu_bytes_rx+=sdu_len;
  eNB_mac_inst[enb_mod_idP].eNB_UE_stats[ue_mod_id].total_num_pdus_rx+=1;
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  LOG_D(MAC,"[eNB %d] Received ULSCH sdu from PHY (rnti %x, UE_id %d), parsing header\n",enb_mod_idP,rntiP,ue_mod_id);
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  payload_ptr = parse_ulsch_header(sdu,&num_ce,&num_sdu,rx_ces,rx_lcids,rx_lengths,sdu_len);

  // control element
  for (i=0;i<num_ce;i++) {

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      switch (rx_ces[i]) { // implement and process BSR + CRNTI +
      case POWER_HEADROOM:
        eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_id].phr_info =  (payload_ptr[0] & 0x3f);// - PHR_MAPPING_OFFSET;
        LOG_D(MAC, "[eNB] MAC CE_LCID %d : Received PHR PH = %d (db)\n", rx_ces[i], eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_id].phr_info);
        payload_ptr+=sizeof(POWER_HEADROOM_CMD);
        break;
      case CRNTI:
        LOG_D(MAC, "[eNB] MAC CE_LCID %d : Received CRNTI %d \n", rx_ces[i], payload_ptr[0]);
        payload_ptr+=1;
        break;
      case TRUNCATED_BSR:
      case SHORT_BSR: {
        u8 lcgid;

        lcgid = (payload_ptr[0] >> 6);
        LOG_D(MAC, "[eNB] MAC CE_LCID %d : Received short BSR LCGID = %u bsr = %d\n",
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            rx_ces[i], lcgid, payload_ptr[0] & 0x3f);
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        eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_id].bsr_info[lcgid] = (payload_ptr[0] & 0x3f);
        payload_ptr += 1;//sizeof(SHORT_BSR); // fixme
      } break;
      case LONG_BSR:
        eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_id].bsr_info[LCGID0] = ((payload_ptr[0] & 0xFC) >> 2);
        eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_id].bsr_info[LCGID1] =
            ((payload_ptr[0] & 0x03) << 4) | ((payload_ptr[1] & 0xF0) >> 4);
        eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_id].bsr_info[LCGID2] =
            ((payload_ptr[1] & 0x0F) << 2) | ((payload_ptr[2] & 0xC0) >> 6);
        eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_id].bsr_info[LCGID3] = (payload_ptr[2] & 0x3F);
        LOG_D(MAC, "[eNB] MAC CE_LCID %d: Received long BSR LCGID0 = %u LCGID1 = "
            "%u LCGID2 = %u LCGID3 = %u\n",
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            rx_ces[i],
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            eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_id].bsr_info[LCGID0],
            eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_id].bsr_info[LCGID1],
            eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_id].bsr_info[LCGID2],
            eNB_mac_inst[enb_mod_idP].UE_template[ue_mod_id].bsr_info[LCGID3]);
        payload_ptr += 3;////sizeof(LONG_BSR);
        break;
      default:
        LOG_E(MAC, "[eNB] Received unknown MAC header (0x%02x)\n", rx_ces[i]);
        break;
      }
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  }

  for (i=0;i<num_sdu;i++) {
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      LOG_D(MAC,"SDU Number %d MAC Subheader SDU_LCID %d, length %d\n",i,rx_lcids[i],rx_lengths[i]);

      if ((rx_lcids[i] == DCCH)||(rx_lcids[i] == DCCH1)) {
          //      if(eNB_mac_inst[module_idP].Dcch_lchan[UE_id].Active==1){
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#if defined(ENABLE_MAC_PAYLOAD_DEBUG)
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          LOG_T(MAC,"offset: %d\n",(unsigned char)((unsigned char*)payload_ptr-sdu));
          for (j=0;j<32;j++)
            LOG_T(MAC,"%x ",payload_ptr[j]);
          LOG_T(MAC,"\n");
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#endif

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          //  This check is just to make sure we didn't get a bogus SDU length, to be removed ...
          if (rx_lengths[i]<CCCH_PAYLOAD_SIZE_MAX) {
              LOG_D(MAC,"[eNB %d] Frame %d : ULSCH -> UL-DCCH, received %d bytes form UE %d on LCID %d(%d) \n",
                  enb_mod_idP,frameP, rx_lengths[i], ue_mod_id, rx_lcids[i], rx_lcids[i]);

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              mac_rlc_data_ind(enb_mod_idP,ue_mod_id, frameP,ENB_FLAG_YES,MBMS_FLAG_NO,
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                  rx_lcids[i],
                  (char *)payload_ptr,
                  rx_lengths[i],
                  1,
                  NULL);//(unsigned int*)crc_status);
              eNB_mac_inst[enb_mod_idP].eNB_UE_stats[ue_mod_id].num_pdu_rx[rx_lcids[i]]+=1;
              eNB_mac_inst[enb_mod_idP].eNB_UE_stats[ue_mod_id].num_bytes_rx[rx_lcids[i]]+=rx_lengths[i];

          }
          //      }
      } else if (rx_lcids[i] >= DTCH) {
          //      if(eNB_mac_inst[module_idP].Dcch_lchan[UE_id].Active==1){
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#if defined(ENABLE_MAC_PAYLOAD_DEBUG)
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          LOG_T(MAC,"offset: %d\n",(unsigned char)((unsigned char*)payload_ptr-sdu));

          for (j=0;j<32;j++)
            LOG_T(MAC,"%x ",payload_ptr[j]);
          LOG_T(MAC,"\n");
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#endif

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          LOG_D(MAC,"[eNB %d] Frame %d : ULSCH -> UL-DTCH, received %d bytes from UE %d for lcid %d (%d)\n",
              enb_mod_idP,frameP, rx_lengths[i], ue_mod_id,rx_lcids[i],rx_lcids[i]);

          if ((rx_lengths[i] <SCH_PAYLOAD_SIZE_MAX) &&  (rx_lengths[i] > 0) ) {   // MAX SIZE OF transport block
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              mac_rlc_data_ind(enb_mod_idP,ue_mod_id, frameP,ENB_FLAG_YES,MBMS_FLAG_NO,
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                  DTCH,
                  (char *)payload_ptr,
                  rx_lengths[i],
                  1,
                  NULL);//(unsigned int*)crc_status);
              eNB_mac_inst[enb_mod_idP].eNB_UE_stats[ue_mod_id].num_pdu_rx[rx_lcids[i]]+=1;
              eNB_mac_inst[enb_mod_idP].eNB_UE_stats[ue_mod_id].num_bytes_rx[rx_lcids[i]]+=rx_lengths[i];

          }
          //      }
      } else {
          eNB_mac_inst[enb_mod_idP].eNB_UE_stats[ue_mod_id].num_errors_rx+=1;
          LOG_E(MAC,"[eNB %d] received unknown LCID %d from UE %d ", rx_lcids[i], ue_mod_id);
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      }
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      payload_ptr+=rx_lengths[i];
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  }

  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_RX_SDU,0);
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  stop_meas(&eNB_mac_inst[enb_mod_idP].rx_ulsch_sdu);
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}

unsigned char generate_dlsch_header(unsigned char *mac_header,
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    unsigned char num_sdus,
    unsigned short *sdu_lengths,
    unsigned char *sdu_lcids,
    unsigned char drx_cmd,
    short timing_advance_cmd,
    unsigned char *ue_cont_res_id,
    unsigned char short_padding,
    unsigned short post_padding) {
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  SCH_SUBHEADER_FIXED *mac_header_ptr = (SCH_SUBHEADER_FIXED *)mac_header;
  u8 first_element=0,last_size=0,i;
  u8 mac_header_control_elements[16],*ce_ptr;

  ce_ptr = &mac_header_control_elements[0];

  // compute header components
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  if ((short_padding == 1) || (short_padding == 2)) {
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      mac_header_ptr->R    = 0;
      mac_header_ptr->E    = 0;
      mac_header_ptr->LCID = SHORT_PADDING;
      first_element=1;
      last_size=1;
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  }
  if (short_padding == 2) {
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      mac_header_ptr->E = 1;
      mac_header_ptr++;
      mac_header_ptr->R = 0;
      mac_header_ptr->E    = 0;
      mac_header_ptr->LCID = SHORT_PADDING;
      last_size=1;
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  }

  if (drx_cmd != 255) {
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      if (first_element>0) {
          mac_header_ptr->E = 1;
          mac_header_ptr++;
      }
      else {
          first_element=1;
      }
      mac_header_ptr->R = 0;
      mac_header_ptr->E    = 0;
      mac_header_ptr->LCID = DRX_CMD;
      last_size=1;
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  }

  if (timing_advance_cmd != 0) {
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      if (first_element>0) {
          mac_header_ptr->E = 1;
          mac_header_ptr++;
      }
      else {
          first_element=1;
      }
      mac_header_ptr->R = 0;
      mac_header_ptr->E    = 0;
      mac_header_ptr->LCID = TIMING_ADV_CMD;
      last_size=1;
      //    msg("last_size %d,mac_header_ptr %p\n",last_size,mac_header_ptr);
      ((TIMING_ADVANCE_CMD *)ce_ptr)->R=0;
      ((TIMING_ADVANCE_CMD *)ce_ptr)->TA=timing_advance_cmd&0x3f;
      LOG_I(MAC,"timing advance =%d (%d)\n",timing_advance_cmd,((TIMING_ADVANCE_CMD *)ce_ptr)->TA);
      ce_ptr+=sizeof(TIMING_ADVANCE_CMD);
      //msg("offset %d\n",ce_ptr-mac_header_control_elements);
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  }

  if (ue_cont_res_id) {
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      if (first_element>0) {
          mac_header_ptr->E = 1;
          /*
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	   printf("[eNB][MAC] last subheader : %x (R%d,E%d,LCID%d)\n",*(unsigned char*)mac_header_ptr,
	   ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->R,
	   ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->E,
	   ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->LCID);
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           */
          mac_header_ptr++;
      }
      else {
          first_element=1;
      }
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      mac_header_ptr->R = 0;
      mac_header_ptr->E    = 0;
      mac_header_ptr->LCID = UE_CONT_RES;
      last_size=1;

      LOG_T(MAC,"[eNB ][RAPROC] Generate contention resolution msg: %x.%x.%x.%x.%x.%x\n",
          ue_cont_res_id[0],
          ue_cont_res_id[1],
          ue_cont_res_id[2],
          ue_cont_res_id[3],
          ue_cont_res_id[4],
          ue_cont_res_id[5]);

      memcpy(ce_ptr,ue_cont_res_id,6);
      ce_ptr+=6;
      // msg("(cont_res) : offset %d\n",ce_ptr-mac_header_control_elements);
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  }

  //msg("last_size %d,mac_header_ptr %p\n",last_size,mac_header_ptr);

  for (i=0;i<num_sdus;i++) {
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      LOG_T(MAC,"[eNB] Generate DLSCH header num sdu %d len sdu %d\n",num_sdus, sdu_lengths[i]);
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      if (first_element>0) {
          mac_header_ptr->E = 1;
          /*msg("last subheader : %x (R%d,E%d,LCID%d)\n",*(unsigned char*)mac_header_ptr,
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	((SCH_SUBHEADER_FIXED *)mac_header_ptr)->R,
	((SCH_SUBHEADER_FIXED *)mac_header_ptr)->E,
	((SCH_SUBHEADER_FIXED *)mac_header_ptr)->LCID);
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           */
          mac_header_ptr+=last_size;
          //msg("last_size %d,mac_header_ptr %p\n",last_size,mac_header_ptr);
      }
      else {
          first_element=1;
      }
      if (sdu_lengths[i] < 128) {
          ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->R    = 0;
          ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->E    = 0;
          ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->F    = 0;
          ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->LCID = sdu_lcids[i];
          ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->L    = (unsigned char)sdu_lengths[i];
          last_size=2;
      }
      else {
          ((SCH_SUBHEADER_LONG *)mac_header_ptr)->R    = 0;
          ((SCH_SUBHEADER_LONG *)mac_header_ptr)->E    = 0;
          ((SCH_SUBHEADER_LONG *)mac_header_ptr)->F    = 1;
          ((SCH_SUBHEADER_LONG *)mac_header_ptr)->LCID = sdu_lcids[i];
          ((SCH_SUBHEADER_LONG *)mac_header_ptr)->L_MSB    = ((unsigned short) sdu_lengths[i]>>8)&0x7f;
          ((SCH_SUBHEADER_LONG *)mac_header_ptr)->L_LSB    = (unsigned short) sdu_lengths[i]&0xff;
          ((SCH_SUBHEADER_LONG *)mac_header_ptr)->padding   = 0x00;
          last_size=3;
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#ifdef DEBUG_HEADER_PARSING
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          LOG_D(MAC,"[eNB] generate long sdu, size %x (MSB %x, LSB %x)\n",
              sdu_lengths[i],
              ((SCH_SUBHEADER_LONG *)mac_header_ptr)->L_MSB,
              ((SCH_SUBHEADER_LONG *)mac_header_ptr)->L_LSB);
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#endif
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      }
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  }
  /*

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    printf("last_size %d,mac_header_ptr %p\n",last_size,mac_header_ptr);
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    printf("last subheader : %x (R%d,E%d,LCID%d)\n",*(unsigned char*)mac_header_ptr,
    ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->R,
    ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->E,
    ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->LCID);


    if (((SCH_SUBHEADER_FIXED*)mac_header_ptr)->LCID < UE_CONT_RES) {
    if (((SCH_SUBHEADER_SHORT*)mac_header_ptr)->F == 0)
    printf("F = 0, sdu len (L field) %d\n",(((SCH_SUBHEADER_SHORT*)mac_header_ptr)->L));
    else
    printf("F = 1, sdu len (L field) %d\n",(((SCH_SUBHEADER_LONG*)mac_header_ptr)->L));
    }
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   */
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  if (post_padding>0) {// we have lots of padding at the end of the packet
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      mac_header_ptr->E = 1;
      mac_header_ptr+=last_size;
      // add a padding element
      mac_header_ptr->R    = 0;
      mac_header_ptr->E    = 0;
      mac_header_ptr->LCID = SHORT_PADDING;
      mac_header_ptr++;
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  }
  else { // no end of packet padding
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      // last SDU subhead is of fixed type (sdu length implicitly to be computed at UE)
      mac_header_ptr++;
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  }

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  //msg("After subheaders %d\n",(u8*)mac_header_ptr - mac_header);
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  if ((ce_ptr-mac_header_control_elements) > 0) {
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      // printf("Copying %d bytes for control elements\n",ce_ptr-mac_header_control_elements);
      memcpy((void*)mac_header_ptr,mac_header_control_elements,ce_ptr-mac_header_control_elements);
      mac_header_ptr+=(unsigned char)(ce_ptr-mac_header_control_elements);
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  }
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  //msg("After CEs %d\n",(u8*)mac_header_ptr - mac_header);
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  return((unsigned char*)mac_header_ptr - mac_header);

}

/*
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  #ifdef Rel10
  unsigned char generate_mch_header( unsigned char *mac_header,
  unsigned char num_sdus,
  unsigned short *sdu_lengths,
  unsigned char *sdu_lcids,
  unsigned char msi,
  unsigned char short_padding,
  unsigned short post_padding) {
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  SCH_SUBHEADER_FIXED *mac_header_ptr = (SCH_SUBHEADER_FIXED *)mac_header;
  u8 first_element=0,last_size=0,i;
  u8 mac_header_control_elements[2*num_sdus],*ce_ptr;

  ce_ptr = &mac_header_control_elements[0];

  if ((short_padding == 1) || (short_padding == 2)) {
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  mac_header_ptr->R    = 0;
  mac_header_ptr->E    = 0;
  mac_header_ptr->LCID = SHORT_PADDING;
  first_element=1;
  last_size=1;
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  }
  if (short_padding == 2) {
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  mac_header_ptr->E = 1;
  mac_header_ptr++;
  mac_header_ptr->R = 0;
  mac_header_ptr->E    = 0;
  mac_header_ptr->LCID = SHORT_PADDING;
  last_size=1;
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  }

  // SUBHEADER for MSI CE
  if (msi != 0) {// there is MSI MAC Control Element
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  if (first_element>0) {
  mac_header_ptr->E = 1;
  mac_header_ptr+=last_size;
  }
  else {
  first_element = 1;
  }
  if (num_sdus*2 < 128) {
  ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->R    = 0;
  ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->E    = 0;
  ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->F    = 0;
  ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->LCID = MCH_SCHDL_INFO;
  ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->L    = num_sdus*2;
  last_size=2;
  }
  else {
  ((SCH_SUBHEADER_LONG *)mac_header_ptr)->R    = 0;
  ((SCH_SUBHEADER_LONG *)mac_header_ptr)->E    = 0;
  ((SCH_SUBHEADER_LONG *)mac_header_ptr)->F    = 1;
  ((SCH_SUBHEADER_LONG *)mac_header_ptr)->LCID = MCH_SCHDL_INFO;
  ((SCH_SUBHEADER_LONG *)mac_header_ptr)->L    = (num_sdus*2)&0x7fff;
  last_size=3;
  }
  // Create the MSI MAC Control Element here
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  }
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  // SUBHEADER for MAC SDU (MCCH+MTCHs)
  for (i=0;i<num_sdus;i++) {
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  if (first_element>0) {
  mac_header_ptr->E = 1;
  mac_header_ptr+=last_size;
  }
  else {
  first_element = 1;
  }
  if (sdu_lengths[i] < 128) {
  ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->R    = 0;
  ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->E    = 0;
  ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->F    = 0;
  ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->LCID = sdu_lcids[i];
  ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->L    = (unsigned char)sdu_lengths[i];
  last_size=2;
  }
  else {
  ((SCH_SUBHEADER_LONG *)mac_header_ptr)->R    = 0;
  ((SCH_SUBHEADER_LONG *)mac_header_ptr)->E    = 0;
  ((SCH_SUBHEADER_LONG *)mac_header_ptr)->F    = 1;
  ((SCH_SUBHEADER_LONG *)mac_header_ptr)->LCID = sdu_lcids[i];
  ((SCH_SUBHEADER_LONG *)mac_header_ptr)->L    = (unsigned short) sdu_lengths[i]&0x7fff;
  last_size=3;
  }
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  }

  if (post_padding>0) {// we have lots of padding at the end of the packet
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  mac_header_ptr->E = 1;
  mac_header_ptr+=last_size;
  // add a padding element
  mac_header_ptr->R    = 0;
  mac_header_ptr->E    = 0;
  mac_header_ptr->LCID = SHORT_PADDING;
  mac_header_ptr++;
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  }
  else { // no end of packet padding
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  // last SDU subhead is of fixed type (sdu length implicitly to be computed at UE)
  mac_header_ptr++;
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  }

  // Copy MSI Control Element to the end of the MAC Header if it presents
  if ((ce_ptr-mac_header_control_elements) > 0) {
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  // printf("Copying %d bytes for control elements\n",ce_ptr-mac_header_control_elements);
  memcpy((void*)mac_header_ptr,mac_header_control_elements,ce_ptr-mac_header_control_elements);
  mac_header_ptr+=(unsigned char)(ce_ptr-mac_header_control_elements);
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  }

  return((unsigned char*)mac_header_ptr - mac_header);
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  }
  #endif
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 */
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void add_common_dci(DCI_PDU *DCI_pdu,
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    void *pdu,
    rnti_t rnti,
    unsigned char dci_size_bytes,
    unsigned char aggregation,
    unsigned char dci_size_bits,
    unsigned char dci_fmt,
    u8 ra_flag) {
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  memcpy(&DCI_pdu->dci_alloc[DCI_pdu->Num_common_dci].dci_pdu[0],pdu,dci_size_bytes);
  DCI_pdu->dci_alloc[DCI_pdu->Num_common_dci].dci_length = dci_size_bits;
  DCI_pdu->dci_alloc[DCI_pdu->Num_common_dci].L          = aggregation;
  DCI_pdu->dci_alloc[DCI_pdu->Num_common_dci].rnti       = rnti;
  DCI_pdu->dci_alloc[DCI_pdu->Num_common_dci].format     = dci_fmt;
  DCI_pdu->dci_alloc[DCI_pdu->Num_common_dci].ra_flag    = ra_flag;


  DCI_pdu->Num_common_dci++;
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  LOG_D(MAC,"add common dci format %d for rnti %d \n",dci_fmt,rnti);
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}

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void add_ue_spec_dci(DCI_PDU *DCI_pdu,void *pdu,rnti_t rnti,unsigned char dci_size_bytes,unsigned char aggregation,unsigned char dci_size_bits,unsigned char dci_fmt,u8 ra_flag) {
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  memcpy(&DCI_pdu->dci_alloc[DCI_pdu->Num_common_dci+DCI_pdu->Num_ue_spec_dci].dci_pdu[0],pdu,dci_size_bytes);
  DCI_pdu->dci_alloc[DCI_pdu->Num_common_dci+DCI_pdu->Num_ue_spec_dci].dci_length = dci_size_bits;
  DCI_pdu->dci_alloc[DCI_pdu->Num_common_dci+DCI_pdu->Num_ue_spec_dci].L          = aggregation;
  DCI_pdu->dci_alloc[DCI_pdu->Num_common_dci+DCI_pdu->Num_ue_spec_dci].rnti       = rnti;
  DCI_pdu->dci_alloc[DCI_pdu->Num_common_dci+DCI_pdu->Num_ue_spec_dci].format     = dci_fmt;
  DCI_pdu->dci_alloc[DCI_pdu->Num_common_dci+DCI_pdu->Num_ue_spec_dci].ra_flag    = ra_flag;

  DCI_pdu->Num_ue_spec_dci++;
}

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void schedule_SI(module_id_t module_idP,frame_t frameP, unsigned char *nprb,unsigned int *nCCE) {
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  start_meas(&eNB_mac_inst[module_idP].schedule_si);
  
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  unsigned char bcch_sdu_length;
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  int mcs = -1;
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  void *BCCH_alloc_pdu=(void*)&eNB_mac_inst[module_idP].BCCH_alloc_pdu;

  bcch_sdu_length = mac_rrc_data_req(module_idP,
      frameP,
      BCCH,1,
      &eNB_mac_inst[module_idP].BCCH_pdu.payload[0],
      1,
      module_idP,
      0); // not used in this case
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  if (bcch_sdu_length > 0) {
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      LOG_D(MAC,"[eNB %d] Frame %d : BCCH->DLSCH, Received %d bytes \n",module_idP,frameP,bcch_sdu_length);


      if (bcch_sdu_length <= (mac_xface->get_TBS_DL(0,3)))
        mcs=0;
      else if (bcch_sdu_length <= (mac_xface->get_TBS_DL(1,3)))
        mcs=1;
      else if (bcch_sdu_length <= (mac_xface->get_TBS_DL(2,3)))
        mcs=2;
      else if (bcch_sdu_length <= (mac_xface->get_TBS_DL(3,3)))
        mcs=3;
      else if (bcch_sdu_length <= (mac_xface->get_TBS_DL(4,3)))
        mcs=4;
      else if (bcch_sdu_length <= (mac_xface->get_TBS_DL(5,3)))
        mcs=5;
      else if (bcch_sdu_length <= (mac_xface->get_TBS_DL(6,3)))
        mcs=6;
      else if (bcch_sdu_length <= (mac_xface->get_TBS_DL(7,3)))
        mcs=7;
      else if (bcch_sdu_length <= (mac_xface->get_TBS_DL(8,3)))
        mcs=8;
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      if (mac_xface->lte_frame_parms->frame_type == TDD) {
          switch (mac_xface->lte_frame_parms->N_RB_DL) {
          case 6:
            ((DCI1A_1_5MHz_TDD_1_6_t*)BCCH_alloc_pdu)->mcs = mcs;
            break;
          case 25:
            ((DCI1A_5MHz_TDD_1_6_t*)BCCH_alloc_pdu)->mcs = mcs;
            break;
          case 50:
            ((DCI1A_10MHz_TDD_1_6_t*)BCCH_alloc_pdu)->mcs = mcs;
            break;
          case 100:
            ((DCI1A_20MHz_TDD_1_6_t*)BCCH_alloc_pdu)->mcs = mcs;
            break;

          }
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      }
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      else {
          switch (mac_xface->lte_frame_parms->N_RB_DL) {
          case 6:
            ((DCI1A_1_5MHz_FDD_t*)BCCH_alloc_pdu)->mcs = mcs;
            break;
          case 25:
            ((DCI1A_5MHz_FDD_t*)BCCH_alloc_pdu)->mcs = mcs;
            break;
          case 50:
            ((DCI1A_10MHz_FDD_t*)BCCH_alloc_pdu)->mcs = mcs;
            break;
          case 100:
            ((DCI1A_20MHz_FDD_t*)BCCH_alloc_pdu)->mcs = mcs;
            break;

          }
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      }
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#if defined(USER_MODE) && defined(OAI_EMU)
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      if (oai_emulation.info.opt_enabled) {
        trace_pdu(1,
                  &eNB_mac_inst[module_idP].BCCH_pdu.payload[0],
                  bcch_sdu_length,
                  0xffff,
                  4,
                  0xffff,
                  eNB_mac_inst[module_idP].subframe,
                  0,
                  0);
      }
      LOG_D(OPT,"[eNB %d][BCH] Frame %d trace pdu for rnti %x with size %d\n",
                 module_idP, frameP, 0xffff, bcch_sdu_length);
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#endif

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      if (mac_xface->lte_frame_parms->frame_type == TDD) {
          LOG_D(MAC,"[eNB] Frame %d : Scheduling BCCH->DLSCH (TDD) for SI %d bytes (mcs %d, rb 3, TBS %d)\n",
              frameP,
              bcch_sdu_length,
              mcs,
              mac_xface->get_TBS_DL(mcs,3));
      }
      else {
          LOG_D(MAC,"[eNB] Frame %d : Scheduling BCCH->DLSCH (FDD) for SI %d bytes (mcs %d, rb 3, TBS %d)\n",
              frameP,
              bcch_sdu_length,
              mcs,
              mac_xface->get_TBS_DL(mcs,3));
      }
      eNB_mac_inst[module_idP].bcch_active=1;
      *nprb=3;
      *nCCE=4;
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  }
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  else {
    eNB_mac_inst[module_idP].bcch_active=0;
    *nprb=0;
    *nCCE=0;
    //LOG_D(MAC,"[eNB %d] Frame %d : BCCH not active \n",Mod_id,frame);
  }
  // this might be misleading when bcch is inactive
  stop_meas(&eNB_mac_inst[module_idP].schedule_si);
  return;
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}

#ifdef Rel10
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s8 get_mbsfn_sf_alloction (module_id_t module_idP, u8 mbsfn_sync_area){
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  // currently there is one-to-one mapping between sf allocation pattern and sync area
  if (mbsfn_sync_area > MAX_MBSFN_AREA){
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      LOG_W(MAC,"[eNB %d] MBSFN synchronization area %d out of range\n ", module_idP, mbsfn_sync_area);
      return -1;
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  }
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  else if (eNB_mac_inst[module_idP].mbsfn_SubframeConfig[mbsfn_sync_area] != NULL)
    return mbsfn_sync_area;
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  else {
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      LOG_W(MAC,"[eNB %d] MBSFN Subframe Config pattern %d not found \n ", module_idP, mbsfn_sync_area);
      return -1;
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  }
}
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int schedule_MBMS(module_id_t module_idP, frame_t frameP, sub_frame_t subframeP) {
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  int mcch_flag=0,mtch_flag=0, msi_flag=0;
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  int mbsfn_period =0;// 1<<(eNB_mac_inst[module_idP].mbsfn_SubframeConfig[0]->radioframeAllocationPeriod);
  int mcch_period = 0;//32<<(eNB_mac_inst[module_idP].mbsfn_AreaInfo[0]->mcch_Config_r9.mcch_RepetitionPeriod_r9);
  int mch_scheduling_period = 8<<(eNB_mac_inst[module_idP].pmch_Config[0]->mch_SchedulingPeriod_r9);
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  unsigned char mcch_sdu_length;
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  unsigned char header_len_mcch=0,header_len_msi=0,header_len_mtch=0, header_len_mtch_temp=0, header_len_mcch_temp=0, header_len_msi_temp=0;
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  int ii=0, msi_pos=0;
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  int mcch_mcs = -1;
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  u16 TBS,j,padding=0,post_padding=0;
  mac_rlc_status_resp_t rlc_status;
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  int num_mtch;
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  int msi_length,i,k;
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  unsigned char sdu_lcids[11], num_sdus=0, offset=0;
  u16 sdu_lengths[11], sdu_length_total=0;
  unsigned char mch_buffer[MAX_DLSCH_PAYLOAD_BYTES]; // check the max value, this is for dlsch only

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  eNB_mac_inst[module_idP].MCH_pdu.Pdu_size=0;
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  for (i=0;
      i< eNB_mac_inst[module_idP].num_active_mbsfn_area;
      i++ ){
      // assume, that there is always a mapping
      if ((j=get_mbsfn_sf_alloction(module_idP,i)) == -1)
        return 0;

      mbsfn_period = 1<<(eNB_mac_inst[module_idP].mbsfn_SubframeConfig[j]->radioframeAllocationPeriod);
      mcch_period = 32<<(eNB_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_RepetitionPeriod_r9);
      msi_pos=0; ii=0;
      LOG_D(MAC,"[eNB %d] Frame %d subframeP %d : Checking MBSFN Sync Area %d/%d with SF allocation %d/%d for MCCH and MTCH (mbsfn period %d, mcch period %d)\n",
          module_idP,frameP, subframeP,i,eNB_mac_inst[module_idP].num_active_mbsfn_area,
          j,eNB_mac_inst[module_idP].num_sf_allocation_pattern,mbsfn_period,mcch_period);


      switch (eNB_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.signallingMCS_r9) {
      case 0:
        mcch_mcs = 2;
        break;
      case 1:
        mcch_mcs = 7;
        break;
      case 2:
        mcch_mcs = 13;
        break;
      case 3:
        mcch_mcs = 19;
        break;
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      }
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      // 1st: Check the MBSFN subframes from SIB2 info (SF allocation pattern i, max 8 non-overlapping patterns exist)
      if (frameP %  mbsfn_period == eNB_mac_inst[module_idP].mbsfn_SubframeConfig[j]->radioframeAllocationOffset){ // MBSFN frameP
          if (eNB_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.present == MBSFN_SubframeConfig__subframeAllocation_PR_oneFrame){// one-frameP format

              //  Find the first subframeP in this MCH to transmit MSI
              if (frameP % mch_scheduling_period == eNB_mac_inst[module_idP].mbsfn_SubframeConfig[j]->radioframeAllocationOffset ) {
                  while (ii == 0) {
                      ii = eNB_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & (0x80>>msi_pos);
                      msi_pos++;
                  }
                  LOG_D(MAC,"[eNB %d] Frame %d subframeP %d : sync area %d sf allocation pattern %d sf alloc %x msi pos is %d \n", module_idP,frameP, subframeP,i,j,eNB_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0], msi_pos);
              }

              // Check if the subframeP is for MSI, MCCH or MTCHs and Set the correspoding flag to 1
              switch (subframeP) {
              case 1:
                if (mac_xface->lte_frame_parms->frame_type == FDD) {
                    if ((eNB_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_FDD_SF1) == MBSFN_FDD_SF1) {
                        if (msi_pos == 1)
                          msi_flag = 1;
                        if ( (frameP % mcch_period == eNB_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
                            ((eNB_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_FDD_SF1) == MBSFN_FDD_SF1) )
                          mcch_flag = 1;
                        mtch_flag = 1;
                    }
                }
                break;

              case 2:
                if (mac_xface->lte_frame_parms->frame_type == FDD){
                    if ((eNB_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_FDD_SF2) == MBSFN_FDD_SF2) {
                        if (msi_pos == 2)
                          msi_flag = 1;
                        if ( (frameP % mcch_period == eNB_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
                            ((eNB_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_FDD_SF2) == MBSFN_FDD_SF2) )
                          mcch_flag = 1;
                        mtch_flag = 1;
                    }
                }
                break;

              case 3:
                if (mac_xface->lte_frame_parms->frame_type == TDD){// TDD
                    if ((eNB_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_TDD_SF3) == MBSFN_TDD_SF3) {
                        if (msi_pos == 1)
                          msi_flag = 1;
                        if ( (frameP % mcch_period == eNB_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
                            ((eNB_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_TDD_SF3) == MBSFN_TDD_SF3) )
                          mcch_flag = 1;
                        mtch_flag = 1;
                    }
                }
                else {// FDD
                    if ((eNB_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_FDD_SF3) == MBSFN_FDD_SF3) {
                        if (msi_pos == 3)
                          msi_flag = 1;
                        if ( (frameP % mcch_period == eNB_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
                            ((eNB_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_FDD_SF3) == MBSFN_FDD_SF3) )
                          mcch_flag = 1;
                        mtch_flag = 1;
                    }
                }
                break;

              case 4:
                if (mac_xface->lte_frame_parms->frame_type == TDD){
                    if ((eNB_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_TDD_SF4) == MBSFN_TDD_SF4) {
                        if (msi_pos == 2)
                          msi_flag = 1;
                        if ( (frameP % mcch_period == eNB_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
                            ((eNB_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_TDD_SF4) == MBSFN_TDD_SF4) )
                          mcch_flag = 1;
                        mtch_flag = 1;
                    }
                }
                break;

              case 6:
                if (mac_xface->lte_frame_parms->frame_type == FDD){
                    if ((eNB_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_FDD_SF6) == MBSFN_FDD_SF6) {
                        if (msi_pos == 4)
                          msi_flag = 1;
                        if ( (frameP % mcch_period == eNB_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
                            ((eNB_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_FDD_SF6) == MBSFN_FDD_SF6) )
                          mcch_flag = 1;
                        mtch_flag = 1;
                    }
                }
                break;

              case 7:
                if (mac_xface->lte_frame_parms->frame_type == TDD){ // TDD
                    if ((eNB_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_TDD_SF7) == MBSFN_TDD_SF7) {
                        if (msi_pos == 3)
                          msi_flag = 1;
                        if ( (frameP % mcch_period == eNB_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
                            ((eNB_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_TDD_SF7) == MBSFN_TDD_SF7) )
                          mcch_flag = 1;
                        mtch_flag = 1;
                    }
                }
                else {// FDD
                    if ((eNB_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_FDD_SF7) == MBSFN_FDD_SF7) {
                        if (msi_pos == 5)
                          msi_flag = 1;
                        if ( (frameP % mcch_period == eNB_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
                            ((eNB_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_FDD_SF7) == MBSFN_FDD_SF7) )
                          mcch_flag = 1;
                        mtch_flag = 1;
                    }
                }
                break;

              case 8:
                if (mac_xface->lte_frame_parms->frame_type == TDD){ //TDD
                    if ((eNB_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_TDD_SF8) == MBSFN_TDD_SF8) {
                        if (msi_pos == 4)
                          msi_flag = 1;
                        if ( (frameP % mcch_period == eNB_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
                            ((eNB_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_TDD_SF8) == MBSFN_TDD_SF8) )
                          mcch_flag = 1;
                        mtch_flag = 1;
                    }
                }
                else{ // FDD
                    if ((eNB_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_FDD_SF8) == MBSFN_FDD_SF8) {
                        if (msi_pos == 6)
                          msi_flag = 1;
                        if ( (frameP % mcch_period == eNB_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
                            ((eNB_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_FDD_SF8) == MBSFN_FDD_SF8) )
                          mcch_flag = 1;
                        mtch_flag = 1;
                    }
                }
                break;

              case 9:
                if (mac_xface->lte_frame_parms->frame_type == TDD){
                    if ((eNB_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_TDD_SF9) == MBSFN_TDD_SF9) {
                        if (msi_pos == 5)
                          msi_flag = 1;
                        if ( (frameP % mcch_period == eNB_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
                            ((eNB_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_TDD_SF9) == MBSFN_TDD_SF9) )
                          mcch_flag = 1;
                        mtch_flag = 1;
                    }
                }
                break;
              }// end switch
              // sf allocation is non-overlapping
              if ((msi_flag==1) || (mcch_flag==1) || (mtch_flag==1)){
                  LOG_D(MAC,"[eNB %d] Frame %d Subframe %d: sync area %d SF alloc %d: msi flag %d, mcch flag %d, mtch flag %d\n",
                      module_idP, frameP, subframeP,i,j,msi_flag,mcch_flag,mtch_flag);
                  break;
              }
          }
          else {// four-frameP format
          }
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      }
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  } // end of for loop
  eNB_mac_inst[module_idP].msi_active=0;
  eNB_mac_inst[module_idP].mcch_active=0;
  eNB_mac_inst[module_idP].mtch_active=0;
  // Calculate the mcs
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  if ((msi_flag==1) || (mcch_flag==1)) {
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      eNB_mac_inst[module_idP].MCH_pdu.mcs = mcch_mcs;
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  }
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  else if (mtch_flag == 1) { // only MTCH in this subframeP
      eNB_mac_inst[module_idP].MCH_pdu.mcs = eNB_mac_inst[module_idP].pmch_Config[0]->dataMCS_r9;
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  }
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  // 2nd: Create MSI, get MCCH from RRC and MTCHs from RLC
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  // there is MSI (MCH Scheduling Info)
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  if (msi_flag == 1) {
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      // Create MSI here
      u16 msi_control_element[29], *msi_ptr;

      msi_ptr = &msi_control_element[0];
      ((MSI_ELEMENT *) msi_ptr)->lcid = MCCH_LCHANID; //MCCH
      if (mcch_flag==1) {
          ((MSI_ELEMENT *) msi_ptr)->stop_sf_MSB = 0;
          ((MSI_ELEMENT *) msi_ptr)->stop_sf_LSB = 0;
      }
      else {                    // no mcch for this MSP
          ((MSI_ELEMENT *) msi_ptr)->stop_sf_MSB = 0x7;// stop value is 2047
          ((MSI_ELEMENT *) msi_ptr)->stop_sf_LSB = 0xff;
      }
      msi_ptr+= sizeof(MSI_ELEMENT);

      //Header for MTCHs
      num_mtch = eNB_mac_inst[module_idP].mbms_SessionList[0]->list.count;
      for (k=0;k<num_mtch;k++) { // loop for all session in this MCH (MCH[0]) at this moment
          ((MSI_ELEMENT *) msi_ptr)->lcid = eNB_mac_inst[module_idP].mbms_SessionList[0]->list.array[k]->logicalChannelIdentity_r9;//mtch_lcid;
          ((MSI_ELEMENT *) msi_ptr)->stop_sf_MSB = 0; // last subframeP of this mtch (only one mtch now)
          ((MSI_ELEMENT *) msi_ptr)->stop_sf_LSB = 0xB;
          msi_ptr+=sizeof(MSI_ELEMENT);
      }
      msi_length = msi_ptr-msi_control_element;
      if (msi_length<128)
        header_len_msi = 2;
      else
        header_len_msi = 3;

      LOG_D(MAC,"[eNB %d] Frame %d : MSI->MCH, length of MSI is %d bytes \n",module_idP,frameP,msi_length);
      //LOG_D(MAC,"Scheduler: MSI is transmitted in this subframeP \n" );

      //   LOG_D(MAC,"Scheduler: MSI length is %d bytes\n",msi_length);
      // Store MSI data to mch_buffer[0]
      memcpy((char *)&mch_buffer[sdu_length_total],
          msi_control_element,
          msi_length);

      sdu_lcids[num_sdus] = MCH_SCHDL_INFO;
      sdu_lengths[num_sdus] = msi_length;
      sdu_length_total += sdu_lengths[num_sdus];
      LOG_I(MAC,"[eNB %d] Create %d bytes for MSI\n",module_idP,sdu_lengths[num_sdus]);
      num_sdus++;
      eNB_mac_inst[module_idP].msi_active=1;
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  }
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