eNB_scheduler.c 179 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

*******************************************************************************/
/*! \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 "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
*/

extern inline unsigned int taus(void);


void init_ue_sched_info(void){
  int i,j;
  for (i=0;i<NUMBER_OF_eNB_MAX;i++){
    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;
    }
  }
}

void add_ue_ulsch_info(unsigned char Mod_id, unsigned char UE_id, unsigned char subframe, UE_ULSCH_STATUS status){

  eNB_ulsch_info[Mod_id][UE_id].rnti             = find_UE_RNTI(Mod_id,UE_id);
  eNB_ulsch_info[Mod_id][UE_id].subframe         = subframe;
  eNB_ulsch_info[Mod_id][UE_id].status           = status;

  eNB_ulsch_info[Mod_id][UE_id].serving_num++;

}
void add_ue_dlsch_info(unsigned char Mod_id, unsigned char UE_id, unsigned char subframe, UE_DLSCH_STATUS status){

  eNB_dlsch_info[Mod_id][UE_id].rnti             = find_UE_RNTI(Mod_id,UE_id);
  //  eNB_dlsch_info[Mod_id][UE_id].weight           = weight;
  eNB_dlsch_info[Mod_id][UE_id].subframe         = subframe;
  eNB_dlsch_info[Mod_id][UE_id].status           = status;

  eNB_dlsch_info[Mod_id][UE_id].serving_num++;

}

unsigned char get_ue_weight(unsigned char Mod_id, unsigned char UE_id){

  return(eNB_dlsch_info[Mod_id][UE_id].weight);

}

// return is rnti ???
unsigned char schedule_next_ulue(unsigned char Mod_id, unsigned char UE_id, unsigned char subframe){

  unsigned char next_ue;

  // first phase: scheduling for ACK
  switch (subframe) {
    // scheduling for subframe 2: for scheduled user during subframe 5 and 6
  case 8:
    if  ((eNB_dlsch_info[Mod_id][UE_id].status == S_DL_SCHEDULED) &&
	 (eNB_dlsch_info[Mod_id][UE_id].subframe == 5 || eNB_dlsch_info[Mod_id][UE_id].subframe == 6)){
      // set the downlink status
      eNB_dlsch_info[Mod_id][UE_id].status = S_DL_BUFFERED;
      return UE_id;
    }
    break;
    // scheduling for subframe 3: for scheduled user during subframe 7 and 8
  case 9:
    if  ((eNB_dlsch_info[Mod_id][UE_id].status == S_DL_SCHEDULED) &&
	 (eNB_dlsch_info[Mod_id][UE_id].subframe == 7 || eNB_dlsch_info[Mod_id][UE_id].subframe == 8)){
      eNB_dlsch_info[Mod_id][UE_id].status = S_DL_BUFFERED;
      return UE_id;
    }
    break;
    // scheduling UL subframe 4: for scheduled user during subframe 9 and 0
  case 0 :
    if  ((eNB_dlsch_info[Mod_id][UE_id].status == S_DL_SCHEDULED) &&
	 (eNB_dlsch_info[Mod_id][UE_id].subframe == 9 || eNB_dlsch_info[Mod_id][UE_id].subframe == 0)){
      eNB_dlsch_info[Mod_id][UE_id].status = S_DL_BUFFERED;
      return UE_id;
    }
    break;
  default:
    break;
  }

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

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

}

unsigned char schedule_next_dlue(unsigned char Mod_id, unsigned char subframe){

  unsigned char next_ue;

  for (next_ue=0; next_ue <NUMBER_OF_UE_MAX; next_ue++ ){
    if  (eNB_dlsch_info[Mod_id][next_ue].status == S_DL_WAITING)
      return next_ue;
  }
  for (next_ue=0; next_ue <NUMBER_OF_UE_MAX; next_ue++ )
    if  (eNB_dlsch_info[Mod_id][next_ue].status == S_DL_BUFFERED) {
      eNB_dlsch_info[Mod_id][next_ue].status = S_DL_WAITING;
    }
  // next_ue = -1;
  return (-1);//next_ue;

}

void initiate_ra_proc(u8 Mod_id, u32 frame, u16 preamble_index,s16 timing_offset,u8 sect_id,u8 subframe,u8 f_id) {

  u8 i;

  LOG_I(MAC,"[eNB %d][RAPROC] Frame %d Initiating RA procedure for preamble index %d\n",Mod_id,frame,preamble_index);

  for (i=0;i<NB_RA_PROC_MAX;i++) {
    if (eNB_mac_inst[Mod_id].RA_template[i].RA_active==0) {
      eNB_mac_inst[Mod_id].RA_template[i].RA_active=1;
      eNB_mac_inst[Mod_id].RA_template[i].generate_rar=1;
      eNB_mac_inst[Mod_id].RA_template[i].generate_Msg4=0;
      eNB_mac_inst[Mod_id].RA_template[i].wait_ack_Msg4=0;
      eNB_mac_inst[Mod_id].RA_template[i].timing_offset=timing_offset;
      // Put in random rnti (to be replaced with proper procedure!!)
      eNB_mac_inst[Mod_id].RA_template[i].rnti = taus();
      eNB_mac_inst[Mod_id].RA_template[i].RA_rnti = 1+subframe+(10*f_id);
      eNB_mac_inst[Mod_id].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",
	    Mod_id,frame,i,eNB_mac_inst[Mod_id].RA_template[i].rnti,
	    eNB_mac_inst[Mod_id].RA_template[i].RA_active);
      
      return;
    }
  }
}

void cancel_ra_proc(u8 Mod_id, u32 frame, u16 rnti) {
  unsigned char i;
  LOG_I(MAC,"[eNB %d][RAPROC] Frame %d Cancelling RA procedure for UE rnti %x\n",Mod_id,frame,rnti);

  for (i=0;i<NB_RA_PROC_MAX;i++) {
    if (rnti == eNB_mac_inst[Mod_id].RA_template[i].rnti) {
      eNB_mac_inst[Mod_id].RA_template[i].RA_active=0;
      eNB_mac_inst[Mod_id].RA_template[i].generate_rar=0;
      eNB_mac_inst[Mod_id].RA_template[i].generate_Msg4=0;
      eNB_mac_inst[Mod_id].RA_template[i].wait_ack_Msg4=0;
      eNB_mac_inst[Mod_id].RA_template[i].timing_offset=0;
      eNB_mac_inst[Mod_id].RA_template[i].RRC_timer=20;
      eNB_mac_inst[Mod_id].RA_template[i].rnti = 0;
    }
  }
}

void terminate_ra_proc(u8 Mod_id,u32 frame,u16 rnti,unsigned char *msg3, u16 msg3_len) {

  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",
	Mod_id,frame,
	msg3[3],msg3[4],msg3[5],msg3[6],msg3[7], msg3[8], rnti);

  for (i=0;i<NB_RA_PROC_MAX;i++) {
    LOG_D(MAC,"[RAPROC] Checking proc %d : rnti (%x, %x), active %d\n",i,
	  eNB_mac_inst[Mod_id].RA_template[i].rnti, rnti,
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	  eNB_mac_inst[Mod_id].RA_template[i].RA_active);
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    if ((eNB_mac_inst[Mod_id].RA_template[i].rnti==rnti) &&
	(eNB_mac_inst[Mod_id].RA_template[i].RA_active==1)) {

      payload_ptr = parse_ulsch_header(msg3,&num_ce,&num_sdu,rx_ces,rx_lcids,rx_lengths,msg3_len);
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      LOG_D(MAC,"[eNB %d][RAPROC] Frame %d Received CCCH: length %d, offset %d\n",
	    Mod_id,frame,rx_lengths[0],payload_ptr-msg3);
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      if ((num_ce == 0) && (num_sdu==1) && (rx_lcids[0] == CCCH)) { // This is an RRCConnectionRequest/Restablishment
	memcpy(&eNB_mac_inst[Mod_id].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",
	      Mod_id,frame,rx_lengths[0],payload_ptr-msg3);
	UE_id=add_new_ue(Mod_id,eNB_mac_inst[Mod_id].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",
		Mod_id,frame,eNB_mac_inst[Mod_id].RA_template[i].rnti,UE_id);
	}

	if (Is_rrc_registered == 1)
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	  mac_rrc_data_ind(Mod_id,frame,CCCH,(u8 *)payload_ptr,rx_lengths[0],1,Mod_id,0);
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	// 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
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      }
      else if (num_ce >0) {  // handle msg3 which is not RRCConnectionRequest
	//	process_ra_message(msg3,num_ce,rx_lcids,rx_ces);
      }
 
      eNB_mac_inst[Mod_id].RA_template[i].generate_Msg4 = 1;
      eNB_mac_inst[Mod_id].RA_template[i].wait_ack_Msg4 = 0;

      return;
    } // if process is active

  } // loop on RA processes
}

DCI_PDU *get_dci_sdu(u8 Mod_id, u32 frame, u8 subframe) {

  return(&eNB_mac_inst[Mod_id].DCI_pdu);

}

s8 find_UE_id(unsigned char Mod_id,u16 rnti) {

  unsigned char i;

  for (i=0;i<NUMBER_OF_UE_MAX;i++) {
    if (eNB_mac_inst[Mod_id].UE_template[i].rnti==rnti) {
      return(i);
    }
  }
  return(-1);

}

s16 find_UE_RNTI(unsigned char Mod_id, unsigned char UE_id) {

  return (eNB_mac_inst[Mod_id].UE_template[UE_id].rnti);

}
u8 is_UE_active(unsigned char Mod_id, unsigned char UE_id ){
  if (eNB_mac_inst[Mod_id].UE_template[UE_id].rnti !=0 )
    return 1;
  else
    return 0 ;
}
s8 find_active_UEs(unsigned char Mod_id){

  unsigned char UE_id;
  u16 rnti;
  unsigned char nb_active_ue=0;

  for (UE_id=0;UE_id<NUMBER_OF_UE_MAX;UE_id++) {

    if (((rnti=eNB_mac_inst[Mod_id].UE_template[UE_id].rnti) !=0)&&(eNB_mac_inst[Mod_id].UE_template[UE_id].ul_active==1)){

      if (mac_xface->get_eNB_UE_stats(Mod_id,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(Mod_id, UE_id);
      }
    }
  }
  return(nb_active_ue);
}

// function for determining which active ue should be granted resources in uplink based on BSR+QoS
u16 find_ulgranted_UEs(unsigned char Mod_id){

  // all active users should be granted
  return(find_active_UEs(Mod_id));
}

// function for determining which active ue should be granted resources in downlink based on CQI, SI, and BSR
u16 find_dlgranted_UEs(unsigned char Mod_id){

  // all active users should be granted
  return(find_active_UEs(Mod_id));
}
// get aggregatiob form phy for a give UE
unsigned char process_ue_cqi (unsigned char Mod_id, unsigned char UE_id) {

  unsigned char aggregation=2;
  // check the MCS and SNR and set the aggregation accordingly

  return aggregation;
}
#ifdef CBA
u8 find_num_active_UEs_in_cbagroup(unsigned char Mod_id, unsigned char group_id){

  u8 UE_id;
  u16 rnti;
  unsigned char nb_ue_in_pusch=0;
  LTE_eNB_UE_stats* eNB_UE_stats;
  
  for (UE_id=group_id;UE_id<NUMBER_OF_UE_MAX;UE_id+=eNB_mac_inst[Mod_id].num_active_cba_groups) {

    if (((rnti=eNB_mac_inst[Mod_id].UE_template[UE_id].rnti) !=0) && 
	(eNB_mac_inst[Mod_id].UE_template[UE_id].ul_active==1)    && 
	(mac_get_rrc_status(Mod_id,1,UE_id) > RRC_CONNECTED)){
      //  && (UE_is_to_be_scheduled(Mod_id,UE_id))) 
      // check at the phy enb_ue state for this rnti
      if ((eNB_UE_stats= mac_xface->get_eNB_UE_stats(Mod_id,rnti)) != NULL){ 
	if ((eNB_UE_stats->mode == PUSCH) && (UE_is_to_be_scheduled(Mod_id,UE_id) == 0)){ 
	  nb_ue_in_pusch++;
	}
      }
    }
  }
  return(nb_ue_in_pusch);
}
#endif 
s8 add_new_ue(unsigned char Mod_id, u16 rnti) {
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  int i,j;
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  for (i=0;i<NUMBER_OF_UE_MAX;i++) {
    if (eNB_mac_inst[Mod_id].UE_template[i].rnti==0) {
      eNB_mac_inst[Mod_id].UE_template[i].rnti=rnti;
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      for (j=0;j<8;j++) {
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	eNB_mac_inst[Mod_id].UE_template[i].oldNDI[j]=0;
	eNB_mac_inst[Mod_id].UE_template[i].oldNDI_UL[j]=0;
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      }
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      eNB_ulsch_info[Mod_id][i].status = S_UL_WAITING;
      eNB_dlsch_info[Mod_id][i].status = S_UL_WAITING;
      LOG_D(MAC,"[eNB] Add UE_id %d : rnti %x\n",i,eNB_mac_inst[Mod_id].UE_template[i].rnti);
      return((s8)i);
    }
  }
  return(-1);
}

s8 mac_remove_ue(unsigned char Mod_id, unsigned char UE_id) {

  LOG_I(MAC,"Removing UE %d (rnti %x)\n",UE_id,eNB_mac_inst[Mod_id].UE_template[UE_id].rnti);

  // clear all remaining pending transmissions
  eNB_mac_inst[Mod_id].UE_template[UE_id].bsr_info[LCGID0]  = 0;
  eNB_mac_inst[Mod_id].UE_template[UE_id].bsr_info[LCGID1]  = 0;
  eNB_mac_inst[Mod_id].UE_template[UE_id].bsr_info[LCGID2]  = 0;
  eNB_mac_inst[Mod_id].UE_template[UE_id].bsr_info[LCGID3]  = 0;

  eNB_mac_inst[Mod_id].UE_template[UE_id].ul_SR           = 0;
  eNB_mac_inst[Mod_id].UE_template[UE_id].rnti            = 0;
  eNB_mac_inst[Mod_id].UE_template[UE_id].ul_active       = 0;
  eNB_ulsch_info[Mod_id][UE_id].rnti          = 0;
  eNB_ulsch_info[Mod_id][UE_id].status        = S_UL_NONE;
  eNB_dlsch_info[Mod_id][UE_id].rnti          = 0;
  eNB_dlsch_info[Mod_id][UE_id].status        = S_DL_NONE;

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  rrc_eNB_free_UE_index(Mod_id,UE_id);
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  return(1);
}

unsigned char *get_dlsch_sdu(u8 Mod_id,u32 frame,u16 rnti,u8 TBindex) {

  unsigned char UE_id;

  if (rnti==SI_RNTI) {
    LOG_D(MAC,"[eNB %d] Frame %d Get DLSCH sdu for BCCH \n",Mod_id,frame);

    return((unsigned char *)&eNB_mac_inst[Mod_id].BCCH_pdu.payload[0]);
  }
  else {

    UE_id = find_UE_id(Mod_id,rnti);
    LOG_D(MAC,"[eNB %d] Frame %d  Get DLSCH sdu for rnti %x => UE_id %d\n",Mod_id,frame,rnti,UE_id);

    return((unsigned char *)&eNB_mac_inst[Mod_id].DLSCH_pdu[UE_id][TBindex].payload[0]);
  }

}

unsigned char *parse_ulsch_header(unsigned char *mac_header,
				  unsigned char *num_ce,
				  unsigned char *num_sdu,
				  unsigned char *rx_ces,
				  unsigned char *rx_lcids,
				  unsigned short *rx_lengths,
				  unsigned short tb_length) {

  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) {

    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++;
    }
    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++;
      }
    }
  }
  *num_ce = num_ces;
  *num_sdu = num_sdus;

  return(mac_header_ptr);
}

void SR_indication(u8 Mod_id,u32 frame, u16 rnti, u8 subframe) {

  u8 UE_id = find_UE_id(Mod_id,rnti);

  LOG_D(MAC,"[eNB %d][SR %x] Frame %d subframe %d Signaling SR for UE %d \n",Mod_id,rnti,frame,subframe, UE_id);
  eNB_mac_inst[Mod_id].UE_template[UE_id].ul_SR = 1;
  eNB_mac_inst[Mod_id].UE_template[UE_id].ul_active = 1;
}

void rx_sdu(u8 Mod_id,u32 frame,u16 rnti,u8 *sdu, u16 sdu_len) {

  unsigned char rx_ces[MAX_NUM_CE],num_ce,num_sdu,i,*payload_ptr;
  unsigned char rx_lcids[NB_RB_MAX];
  unsigned short rx_lengths[NB_RB_MAX];
  unsigned char UE_id = find_UE_id(Mod_id,rnti);
  int ii,j;
  for(ii=0; ii<NB_RB_MAX; ii++) rx_lengths[ii] = 0;
  
  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_RX_SDU,1);

  eNB_mac_inst[Mod_id].eNB_UE_stats[UE_id].total_pdu_bytes_rx+=sdu_len;
  eNB_mac_inst[Mod_id].eNB_UE_stats[UE_id].total_num_pdus_rx+=1;

  LOG_D(MAC,"[eNB %d] Received ULSCH sdu from PHY (rnti %x, UE_id %d), parsing header\n",Mod_id,rnti,UE_id);
  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++) {

    switch (rx_ces[i]) { // implement and process BSR + CRNTI +
    case POWER_HEADROOM:
      eNB_mac_inst[Mod_id].UE_template[UE_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[Mod_id].UE_template[UE_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",
            rx_ces[i], lcgid, payload_ptr[0] & 0x3f);
      eNB_mac_inst[Mod_id].UE_template[UE_id].bsr_info[lcgid] = (payload_ptr[0] & 0x3f);
      payload_ptr += 1;//sizeof(SHORT_BSR); // fixme
    } break;
    case LONG_BSR:
      eNB_mac_inst[Mod_id].UE_template[UE_id].bsr_info[LCGID0] = ((payload_ptr[0] & 0xFC) >> 2);
      eNB_mac_inst[Mod_id].UE_template[UE_id].bsr_info[LCGID1] =
564
	((payload_ptr[0] & 0x03) << 4) | ((payload_ptr[1] & 0xF0) >> 4);
565
      eNB_mac_inst[Mod_id].UE_template[UE_id].bsr_info[LCGID2] =
566
	((payload_ptr[1] & 0x0F) << 2) | ((payload_ptr[2] & 0xC0) >> 6);
567 568
      eNB_mac_inst[Mod_id].UE_template[UE_id].bsr_info[LCGID3] = (payload_ptr[2] & 0x3F);
      LOG_D(MAC, "[eNB] MAC CE_LCID %d: Received long BSR LCGID0 = %u LCGID1 = "
569
	    "%u LCGID2 = %u LCGID3 = %u\n",
570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720
            rx_ces[i],
            eNB_mac_inst[Mod_id].UE_template[UE_id].bsr_info[LCGID0],
            eNB_mac_inst[Mod_id].UE_template[UE_id].bsr_info[LCGID1],
            eNB_mac_inst[Mod_id].UE_template[UE_id].bsr_info[LCGID2],
            eNB_mac_inst[Mod_id].UE_template[UE_id].bsr_info[LCGID3]);
      break;
    default:
      LOG_E(MAC, "[eNB] Received unknown MAC header (0x%02x)\n", rx_ces[i]);
      break;
    }
  }

  for (i=0;i<num_sdu;i++) {
    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[Mod_id].Dcch_lchan[UE_id].Active==1){

#if defined(ENABLE_MAC_PAYLOAD_DEBUG)
      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");
#endif

      //  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",
	      Mod_id,frame, rx_lengths[i], UE_id, rx_lcids[i], rx_lcids[i]+(UE_id*NB_RB_MAX));

	mac_rlc_data_ind(Mod_id,frame,1,RLC_MBMS_NO,
			 rx_lcids[i]+(UE_id*NB_RB_MAX),
			 (char *)payload_ptr,
			 rx_lengths[i],
			 1,
			 NULL);//(unsigned int*)crc_status);
	eNB_mac_inst[Mod_id].eNB_UE_stats[UE_id].num_pdu_rx[rx_lcids[i]]+=1;
	eNB_mac_inst[Mod_id].eNB_UE_stats[UE_id].num_bytes_rx[rx_lcids[i]]+=rx_lengths[i];

      }
      //      }
    } else if (rx_lcids[i] >= DTCH) {
      //      if(eNB_mac_inst[Mod_id].Dcch_lchan[UE_id].Active==1){

#if defined(ENABLE_MAC_PAYLOAD_DEBUG)
      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"); 
#endif

      LOG_D(MAC,"[eNB %d] Frame %d : ULSCH -> UL-DTCH, received %d bytes from UE %d for lcid %d (%d)\n",
	    Mod_id,frame, rx_lengths[i], UE_id,rx_lcids[i],rx_lcids[i]+(UE_id*NB_RB_MAX));

      if ((rx_lengths[i] <SCH_PAYLOAD_SIZE_MAX) &&  (rx_lengths[i] > 0) ) {   // MAX SIZE OF transport block
	mac_rlc_data_ind(Mod_id,frame,1,RLC_MBMS_NO,
			 DTCH+(UE_id*NB_RB_MAX),
			 (char *)payload_ptr,
			 rx_lengths[i],
			 1,
			 NULL);//(unsigned int*)crc_status);
	eNB_mac_inst[Mod_id].eNB_UE_stats[UE_id].num_pdu_rx[rx_lcids[i]]+=1;
	eNB_mac_inst[Mod_id].eNB_UE_stats[UE_id].num_bytes_rx[rx_lcids[i]]+=rx_lengths[i];
	
      }
      //      }
    } else {
      eNB_mac_inst[Mod_id].eNB_UE_stats[UE_id].num_errors_rx+=1;
      LOG_E(MAC,"[eNB %d] received unknown LCID %d from UE %d ", rx_lcids[i], UE_id);
    }
    
    payload_ptr+=rx_lengths[i];
  }

  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_RX_SDU,0);

}

unsigned char generate_dlsch_header(unsigned char *mac_header,
				    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) {

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

  if (drx_cmd != 255) {
    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;
  }

  if (timing_advance_cmd != 0) {
    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);
  }

  if (ue_cont_res_id) {
    if (first_element>0) {
      mac_header_ptr->E = 1;
      /*   
721 722 723 724
	   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);
725 726 727 728 729 730 731 732 733 734 735 736 737
      */
      mac_header_ptr++;
    }
    else {
      first_element=1;
    }

    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",
738 739 740 741 742 743
	  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]);
744 745 746 747 748 749 750 751 752 753 754 755 756 757
    
    memcpy(ce_ptr,ue_cont_res_id,6);
    ce_ptr+=6;
    // msg("(cont_res) : offset %d\n",ce_ptr-mac_header_control_elements);
  }

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

  for (i=0;i<num_sdus;i++) {
    LOG_T(MAC,"[eNB] Generate DLSCH header num sdu %d len sdu %d\n",num_sdus, sdu_lengths[i]);

    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,
758 759 760
	((SCH_SUBHEADER_FIXED *)mac_header_ptr)->R,
	((SCH_SUBHEADER_FIXED *)mac_header_ptr)->E,
	((SCH_SUBHEADER_FIXED *)mac_header_ptr)->LCID);
761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794
      */
      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;
#ifdef DEBUG_HEADER_PARSING
      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);
#endif
    }
  }
  /*

795
    printf("last_size %d,mac_header_ptr %p\n",last_size,mac_header_ptr);
796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823
  
    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));
    }
  */
  if (post_padding>0) {// we have lots of padding at the end of the packet
    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++;
  }
  else { // no end of packet padding
    // last SDU subhead is of fixed type (sdu length implicitly to be computed at UE)
    mac_header_ptr++;
  }

824
  //msg("After subheaders %d\n",(u8*)mac_header_ptr - mac_header);
825 826 827 828 829 830
  
  if ((ce_ptr-mac_header_control_elements) > 0) {
    // 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);
  }
831
  //msg("After CEs %d\n",(u8*)mac_header_ptr - mac_header);
832 833 834 835 836 837

  return((unsigned char*)mac_header_ptr - mac_header);

}

/*
838 839 840 841 842 843 844 845
  #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) {
846 847 848 849 850 851 852 853

  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)) {
854 855 856 857 858
  mac_header_ptr->R    = 0;
  mac_header_ptr->E    = 0;
  mac_header_ptr->LCID = SHORT_PADDING;
  first_element=1;
  last_size=1;
859 860
  }
  if (short_padding == 2) {
861 862 863 864 865 866
  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;
867 868 869 870
  }

  // SUBHEADER for MSI CE
  if (msi != 0) {// there is MSI MAC Control Element
871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894
  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
895 896 897 898
  }
 
  // SUBHEADER for MAC SDU (MCCH+MTCHs)
  for (i=0;i<num_sdus;i++) {
899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921
  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;
  }
922 923 924
  }

  if (post_padding>0) {// we have lots of padding at the end of the packet
925 926 927 928 929 930 931
  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++;
932 933
  }
  else { // no end of packet padding
934 935
  // last SDU subhead is of fixed type (sdu length implicitly to be computed at UE)
  mac_header_ptr++;
936 937 938 939
  }

  // Copy MSI Control Element to the end of the MAC Header if it presents
  if ((ce_ptr-mac_header_control_elements) > 0) {
940 941 942
  // 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);
943 944 945
  }

  return((unsigned char*)mac_header_ptr - mac_header);
946 947
  }
  #endif
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*/
void add_common_dci(DCI_PDU *DCI_pdu,
		    void *pdu,
		    u16 rnti,
		    unsigned char dci_size_bytes,
		    unsigned char aggregation,
		    unsigned char dci_size_bits,
		    unsigned char dci_fmt,
		    u8 ra_flag) {

  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++;
}

void add_ue_spec_dci(DCI_PDU *DCI_pdu,void *pdu,u16 rnti,unsigned char dci_size_bytes,unsigned char aggregation,unsigned char dci_size_bits,unsigned char dci_fmt,u8 ra_flag) {

  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++;
}

void schedule_SI(unsigned char Mod_id,u32 frame, unsigned char *nprb,unsigned int *nCCE) {

  unsigned char bcch_sdu_length;
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  int mcs = -1;
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  void *BCCH_alloc_pdu=(void*)&eNB_mac_inst[Mod_id].BCCH_alloc_pdu;
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  bcch_sdu_length = mac_rrc_data_req(Mod_id,
				     frame,
				     BCCH,1,
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				     &eNB_mac_inst[Mod_id].BCCH_pdu.payload[0],
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				     1,
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				     Mod_id,
				     0); // not used in this case 
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  if (bcch_sdu_length > 0) {
    LOG_D(MAC,"[eNB %d] Frame %d : BCCH->DLSCH, Received %d bytes \n",Mod_id,frame,bcch_sdu_length);

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    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) {
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      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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    }
    else {
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      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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    }

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

    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",
	    frame,
	    bcch_sdu_length,
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	    mcs,
	    mac_xface->get_TBS_DL(mcs,3));
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    }
    else {
      LOG_D(MAC,"[eNB] Frame %d : Scheduling BCCH->DLSCH (FDD) for SI %d bytes (mcs %d, rb 3, TBS %d)\n",
	    frame,
	    bcch_sdu_length,
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	    mcs,
	    mac_xface->get_TBS_DL(mcs,3));
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    }
    eNB_mac_inst[Mod_id].bcch_active=1;
    *nprb=3;
    *nCCE=4;
    return;
  }
  eNB_mac_inst[Mod_id].bcch_active=0;
  *nprb=0;
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  *nCCE=0; 
  //LOG_D(MAC,"[eNB %d] Frame %d : BCCH not active \n",Mod_id,frame);

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}

#ifdef Rel10
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s8 get_mbsfn_sf_alloction (unsigned char Mod_id, u8 mbsfn_sync_area){
  // currently there is one-to-one mapping between sf allocation pattern and sync area
  if (mbsfn_sync_area > MAX_MBSFN_AREA){
    LOG_W(MAC,"[eNB %d] MBSFN synchronization area %d out of range\n ", Mod_id, mbsfn_sync_area); 
    return -1;
  }
  else if (eNB_mac_inst[Mod_id].mbsfn_SubframeConfig[mbsfn_sync_area] != NULL)
    return mbsfn_sync_area; 
  else {
    LOG_W(MAC,"[eNB %d] MBSFN Subframe Config pattern %d not found \n ", Mod_id, mbsfn_sync_area); 
    return -1;
  }
}
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int schedule_MBMS(unsigned char Mod_id,u32 frame, u8 subframe) {

  int mcch_flag=0,mtch_flag=0, msi_flag=0;
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  int mbsfn_period =0;// 1<<(eNB_mac_inst[Mod_id].mbsfn_SubframeConfig[0]->radioframeAllocationPeriod);
  int mcch_period = 0;//32<<(eNB_mac_inst[Mod_id].mbsfn_AreaInfo[0]->mcch_Config_r9.mcch_RepetitionPeriod_r9);
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  int mch_scheduling_period = 8<<(eNB_mac_inst[Mod_id].pmch_Config[0]->mch_SchedulingPeriod_r9); 
  unsigned char mcch_sdu_length;
  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; 
  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[Mod_id].MCH_pdu.Pdu_size=0;

  for (i=0; 
       i< eNB_mac_inst[Mod_id].num_active_mbsfn_area;
       i++ ){ 
    // assume, that there is always a mapping
    if ((j=get_mbsfn_sf_alloction(Mod_id,i)) == -1)
      return 0;
    
    mbsfn_period = 1<<(eNB_mac_inst[Mod_id].mbsfn_SubframeConfig[j]->radioframeAllocationPeriod);
    mcch_period = 32<<(eNB_mac_inst[Mod_id].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_RepetitionPeriod_r9);
    msi_pos=0; ii=0;
    LOG_D(MAC,"[eNB %d] Frame %d subframe %d : Checking MBSFN Sync Area %d/%d with SF allocation %d/%d for MCCH and MTCH (mbsfn period %d, mcch period %d)\n", 
	  Mod_id,frame, subframe,i,eNB_mac_inst[Mod_id].num_active_mbsfn_area,
	  j,eNB_mac_inst[Mod_id].num_sf_allocation_pattern,mbsfn_period,mcch_period);
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    switch (eNB_mac_inst[Mod_id].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;
    }
  
    // 1st: Check the MBSFN subframes from SIB2 info (SF allocation pattern i, max 8 non-overlapping patterns exist)
    if (frame %  mbsfn_period == eNB_mac_inst[Mod_id].mbsfn_SubframeConfig[j]->radioframeAllocationOffset){ // MBSFN frame
      if (eNB_mac_inst[Mod_id].mbsfn_SubframeConfig[j]->subframeAllocation.present == MBSFN_SubframeConfig__subframeAllocation_PR_oneFrame){// one-frame format
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      //  Find the first subframe in this MCH to transmit MSI
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	if (frame % mch_scheduling_period == eNB_mac_inst[Mod_id].mbsfn_SubframeConfig[j]->radioframeAllocationOffset ) {
	  while (ii == 0) {
	    ii = eNB_mac_inst[Mod_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & (0x80>>msi_pos);
	    msi_pos++;
	  }
	  //LOG_D(MAC,"[eNB %d] Frame %d subframe %d : sync area %d sf allocation pattern %d sf alloc %x msi pos is %d \n", Mod_id,frame, subframe,i,j,eNB_mac_inst[Mod_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0], msi_pos);
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	}
      
      // Check if the subframe is for MSI, MCCH or MTCHs and Set the correspoding flag to 1
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	switch (subframe) {     
	case 1:
	  if (mac_xface->lte_frame_parms->frame_type == FDD) {      
	    if ((eNB_mac_inst[Mod_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_FDD_SF1) == MBSFN_FDD_SF1) {
	      if (msi_pos == 1) 
		msi_flag = 1;
	      if ( (frame % mcch_period == eNB_mac_inst[Mod_id].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) && 
		   ((eNB_mac_inst[Mod_id].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_FDD_SF1) == MBSFN_FDD_SF1) )
		mcch_flag = 1;
	      mtch_flag = 1;
	    }
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	  }
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	  break;
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	case 2:
	  if (mac_xface->lte_frame_parms->frame_type == FDD){
	    if ((eNB_mac_inst[Mod_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_FDD_SF2) == MBSFN_FDD_SF2) {
	      if (msi_pos == 2) 
		msi_flag = 1;
	      if ( (frame % mcch_period == eNB_mac_inst[Mod_id].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) && 
		   ((eNB_mac_inst[Mod_id].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_FDD_SF2) == MBSFN_FDD_SF2) )
		mcch_flag = 1;
	      mtch_flag = 1;
	    }
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	  }
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	  break;
	  
	case 3:
	  if (mac_xface->lte_frame_parms->frame_type == TDD){// TDD
	    if ((eNB_mac_inst[Mod_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_TDD_SF3) == MBSFN_TDD_SF3) {
	      if (msi_pos == 1) 
		msi_flag = 1;
	      if ( (frame % mcch_period == eNB_mac_inst[Mod_id].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) && 
		   ((eNB_mac_inst[Mod_id].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_TDD_SF3) == MBSFN_TDD_SF3) )
		mcch_flag = 1;
	      mtch_flag = 1;
	    }
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	  }
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	  else {// FDD
	    if ((eNB_mac_inst[Mod_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_FDD_SF3) == MBSFN_FDD_SF3) {
	      if (msi_pos == 3) 
		msi_flag = 1;
	      if ( (frame % mcch_period == eNB_mac_inst[Mod_id].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) && 
		   ((eNB_mac_inst[Mod_id].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_FDD_SF3) == MBSFN_FDD_SF3) )
		mcch_flag = 1;
	      mtch_flag = 1;
	    }
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	  }
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	  break;
	  
	case 4:
	  if (mac_xface->lte_frame_parms->frame_type == TDD){
	    if ((eNB_mac_inst[Mod_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_TDD_SF4) == MBSFN_TDD_SF4) {
	      if (msi_pos == 2) 
		msi_flag = 1;
	      if ( (frame % mcch_period == eNB_mac_inst[Mod_id].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) && 
		   ((eNB_mac_inst[Mod_id].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_TDD_SF4) == MBSFN_TDD_SF4) )
		mcch_flag = 1;
	      mtch_flag = 1;
	    }
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	  }
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	  break;
	  
	case 6:
	  if (mac_xface->lte_frame_parms->frame_type == FDD){
	    if ((eNB_mac_inst[Mod_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_FDD_SF6) == MBSFN_FDD_SF6) {
	      if (msi_pos == 4) 
		msi_flag = 1;
	      if ( (frame % mcch_period == eNB_mac_inst[Mod_id].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) && 
		   ((eNB_mac_inst[Mod_id].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_FDD_SF6) == MBSFN_FDD_SF6) )
		mcch_flag = 1;
	      mtch_flag = 1;
	    }
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	  }
	break;
	
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	case 7:
	  if (mac_xface->lte_frame_parms->frame_type == TDD){ // TDD
	    if ((eNB_mac_inst[Mod_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_TDD_SF7) == MBSFN_TDD_SF7) {
	      if (msi_pos == 3) 
		msi_flag = 1;
	      if ( (frame % mcch_period == eNB_mac_inst[Mod_id].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) && 
		   ((eNB_mac_inst[Mod_id].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_TDD_SF7) == MBSFN_TDD_SF7) )
		mcch_flag = 1;
	      mtch_flag = 1;
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	  }
	  }
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	  else {// FDD
	    if ((eNB_mac_inst[Mod_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_FDD_SF7) == MBSFN_FDD_SF7) {
	      if (msi_pos == 5) 
		msi_flag = 1;
	      if ( (frame % mcch_period == eNB_mac_inst[Mod_id].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) && 
		   ((eNB_mac_inst[Mod_id].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_FDD_SF7) == MBSFN_FDD_SF7) )
		mcch_flag = 1;
	      mtch_flag = 1;
	    }
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	  }
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	  break;
	  
	case 8:
	  if (mac_xface->lte_frame_parms->frame_type == TDD){ //TDD
	    if ((eNB_mac_inst[Mod_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_TDD_SF8) == MBSFN_TDD_SF8) {
	      if (msi_pos == 4) 
		msi_flag = 1;
	      if ( (frame % mcch_period == eNB_mac_inst[Mod_id].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) && 
		   ((eNB_mac_inst[Mod_id].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_TDD_SF8) == MBSFN_TDD_SF8) )
		mcch_flag = 1;
	      mtch_flag = 1;
	    }
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	  }
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	  else{ // FDD
	    if ((eNB_mac_inst[Mod_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_FDD_SF8) == MBSFN_FDD_SF8) {
	      if (msi_pos == 6) 
		msi_flag = 1;
	      if ( (frame % mcch_period == eNB_mac_inst[Mod_id].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) && 
		   ((eNB_mac_inst[Mod_id].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_FDD_SF8) == MBSFN_FDD_SF8) )
		mcch_flag = 1;
	      mtch_flag = 1;
	    }
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	  }
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	  break;
	  
	case 9:
	  if (mac_xface->lte_frame_parms->frame_type == TDD){
	    if ((eNB_mac_inst[Mod_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_TDD_SF9) == MBSFN_TDD_SF9) {
	      if (msi_pos == 5) 
		msi_flag = 1;
	      if ( (frame % mcch_period == eNB_mac_inst[Mod_id].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) && 
		   ((eNB_mac_inst[Mod_id].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",
		Mod_id, frame, subframe,i,j,msi_flag,mcch_flag,mtch_flag);
	  break;
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	}
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      }
      else {// four-frame format
      }
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    }
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  } // end of for loop 
  eNB_mac_inst[Mod_id].msi_active=0;
  eNB_mac_inst[Mod_id].mcch_active=0;
  eNB_mac_inst[Mod_id].mtch_active=0;
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    // Calculate the mcs
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  if ((msi_flag==1) || (mcch_flag==1)) {
    eNB_mac_inst[Mod_id].MCH_pdu.mcs = mcch_mcs;
  }
  else if (mtch_flag == 1) { // only MTCH in this subframe 
    eNB_mac_inst[Mod_id].MCH_pdu.mcs = eNB_mac_inst[Mod_id].pmch_Config[0]->dataMCS_r9;
  }
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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
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    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);

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         //Header for MTCHs
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    num_mtch = eNB_mac_inst[Mod_id].mbms_SessionList[0]->list.count;
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    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[Mod_id].mbms_SessionList[0]->list.array[k]->logicalChannelIdentity_r9;//mtch_lcid;
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      ((MSI_ELEMENT *) msi_ptr)->stop_sf_MSB = 0; // last subframe 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;

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

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    //   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],
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	   msi_control_element,
	   msi_length);
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    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",Mod_id,sdu_lengths[num_sdus]); 
    num_sdus++;
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    eNB_mac_inst[Mod_id].msi_active=1;
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  }
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  // there is MCCH
  if (mcch_flag == 1) {
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    LOG_D(MAC,"[eNB %d] Frame %d Subframe %d: Schedule MCCH MESSAGE (area %d, sfAlloc %d)\n",
	  Mod_id,frame, subframe, i, j);
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    mcch_sdu_length = mac_rrc_data_req(Mod_id,
				       frame,
				       MCCH,1,
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				       &eNB_mac_inst[Mod_id].MCCH_pdu.payload[0],
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				       1,// this is eNB
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				       Mod_id, // index 
				       i); // this is the mbsfn sync area index 

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    if (mcch_sdu_length > 0) {
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      LOG_D(MAC,"[eNB %d] Frame %d subframe %d : MCCH->MCH, Received %d bytes from RRC \n",Mod_id,frame,subframe,mcch_sdu_length);
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      header_len_mcch = 2; 
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      if (mac_xface->lte_frame_parms->frame_type == TDD) {
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	LOG_D(MAC,"[eNB %d] Frame %d subframe %d: Scheduling MCCH->MCH (TDD) for MCCH message %d bytes (mcs %d )\n", 
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	      Mod_id,
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	      frame,subframe, 
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	      mcch_sdu_length,
	      mcch_mcs);
      }
      else {
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	LOG_I(MAC,"[eNB %d] Frame %d subframe %d: Scheduling MCCH->MCH (FDD) for MCCH message %d bytes (mcs %d)\n",
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	      Mod_id,
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	      frame, subframe,
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	      mcch_sdu_length,
	      mcch_mcs); 
      }
      eNB_mac_inst[Mod_id].mcch_active=1;

      memcpy((char *)&mch_buffer[sdu_length_total], 
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	     &eNB_mac_inst[Mod_id].MCCH_pdu.payload[0], 
	     mcch_sdu_length);
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      sdu_lcids[num_sdus] = MCCH_LCHANID; 
      sdu_lengths[num_sdus] = mcch_sdu_length;
      if (sdu_lengths[num_sdus]>128)
	header_len_mcch = 3;
      sdu_length_total += sdu_lengths[num_sdus];
      LOG_D(MAC,"[eNB %d] Got %d bytes for MCCH from RRC \n",Mod_id,sdu_lengths[num_sdus]);
      num_sdus++;
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    } 
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  }
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  TBS = mac_xface->get_TBS_DL(eNB_mac_inst[Mod_id].MCH_pdu.mcs, mac_xface->lte_frame_parms->N_RB_DL);
#ifdef Rel10 
  // do not let mcch and mtch multiplexing when relaying is active 
  // for sync area 1, so not transmit data 
  //if ((i == 0) && ((eNB_mac_inst[Mod_id].MBMS_flag != multicast_relay) || (eNB_mac_inst[Mod_id].mcch_active==0))) {
#endif 
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     // there is MTCHs, loop if there are more than 1
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  if (mtch_flag == 1) {
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        // Calculate TBS
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    /* if ((msi_flag==1) || (mcch_flag==1)) {
       TBS = mac_xface->get_TBS(mcch_mcs, mac_xface->lte_frame_parms->N_RB_DL);
       }
       else { // only MTCH in this subframe 
       TBS = mac_xface->get_TBS(eNB_mac_inst[Mod_id].pmch_Config[0]->dataMCS_r9, mac_xface->lte_frame_parms->N_RB_DL);
       }
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    */
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    // get MTCH data from RLC (like for DTCH)
    LOG_D(MAC,"[eNB %d] Frame %d subframe %d: Schedule MTCH (area %d, sfAlloc %d)\n",Mod_id,frame,subframe,i,j);  
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    header_len_mtch = 3;
	  LOG_D(MAC,"[eNB %d], Frame %d, MTCH->MCH, Checking RLC status (rab %d, tbs %d, len %d)\n",
	  Mod_id,frame,MTCH,TBS,
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	  TBS-header_len_mcch-header_len_msi-sdu_length_total-header_len_mtch);
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    rlc_status = mac_rlc_status_ind(Mod_id,frame,1,RLC_MBMS_YES,MTCH+ (maxDRB + 3) * MAX_MOBILES_PER_RG,
				    TBS-header_len_mcch-header_len_msi-sdu_length_total-header_len_mtch);
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    //printf("frame %d, subframe %d,  rlc_status.bytes_in_buffer is %d\n",frame,subframe, rlc_status.bytes_in_buffer);
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    if (rlc_status.bytes_in_buffer >0) {
      LOG_I(MAC,"[eNB %d][MBMS USER-PLANE], Frame %d, MTCH->MCH, Requesting %d bytes from RLC (header len mtch %d)\n",
	    Mod_id,frame,TBS-header_len_mcch-header_len_msi-sdu_length_total-header_len_mtch,header_len_mtch);
      
      sdu_lengths[num_sdus] = mac_rlc_data_req(Mod_id,frame, RLC_MBMS_YES,
					       MTCH + (maxDRB + 3) * MAX_MOBILES_PER_RG,
					       (char*)&mch_buffer[sdu_length_total]);
      //sdu_lengths[num_sdus] = mac_rlc_data_req(Mod_id,frame, RLC_MBMS_NO,  MTCH+(MAX_NUM_RB*(NUMBER_OF_UE_MAX+1)), (char*)&mch_buffer[sdu_length_total]);
      LOG_I(MAC,"[eNB %d][MBMS USER-PLANE] Got %d bytes for MTCH %d\n",Mod_id,sdu_lengths[num_sdus],MTCH);
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      eNB_mac_inst[Mod_id].mtch_active=1;
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      sdu_lcids[num_sdus] = MTCH;
      sdu_length_total += sdu_lengths[num_sdus];
      if (sdu_lengths[num_sdus] < 128)
	header_len_mtch = 2;
      num_sdus++;
    }
    else {
      header_len_mtch = 0;    
    }
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  }
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#ifdef Rel10
  //  }
#endif
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  // FINAL STEP: Prepare and multiplexe MSI, MCCH and MTCHs
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  if ((sdu_length_total + header_len_msi + header_len_mcch + header_len_mtch) >0) {
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    // Adjust the last subheader
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