eNB_scheduler_ulsch.c

/*
 * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The OpenAirInterface Software Alliance licenses this file to You under
 * the OAI Public License, Version 1.1  (the "License"); you may not use this file
 * except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.openairinterface.org/?page_id=698
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *-------------------------------------------------------------------------------
 * For more information about the OpenAirInterface (OAI) Software Alliance:
 *      contact@openairinterface.org
 */

/*! \file eNB_scheduler_ulsch.c
 * \brief eNB procedures for the ULSCH transport channel
 * \author Navid Nikaein and Raymond Knopp
 * \date 2010 - 2014
 * \email: navid.nikaein@eurecom.fr
 * \version 1.0
 * @ingroup _mac

 */

#include "assertions.h"
#include "PHY/defs.h"
#include "PHY/extern.h"

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

#include "LAYER2/MAC/defs.h"
#include "LAYER2/MAC/proto.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 "RRC/LITE/extern.h"
#include "RRC/L2_INTERFACE/openair_rrc_L2_interface.h"

//#include "LAYER2/MAC/pre_processor.c"
#include "pdcp.h"

#if defined(ENABLE_ITTI)
# include "intertask_interface.h"
#endif

#include "T.h"

#define ENABLE_MAC_PAYLOAD_DEBUG
#define DEBUG_eNB_SCHEDULER 1

// This table holds the allowable PRB sizes for ULSCH transmissions
uint8_t rb_table[34] = {1,2,3,4,5,6,8,9,10,12,15,16,18,20,24,25,27,30,32,36,40,45,48,50,54,60,64,72,75,80,81,90,96,100};

void rx_sdu(const module_id_t enb_mod_idP,
            const int         CC_idP,
            const frame_t     frameP,
            const sub_frame_t subframeP,
            const rnti_t      rntiP,
            uint8_t          *sduP,
            const uint16_t    sdu_lenP,
            const uint16_t    timing_advance,
            const uint8_t     ul_cqi)
{
  int current_rnti = rntiP;
  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];
  int    UE_id = find_UE_id(enb_mod_idP, current_rnti);
  int RA_id;
  int ii,j;
  eNB_MAC_INST *eNB = RC.mac[enb_mod_idP];
  int    harq_pid = subframe2harqpid(&eNB->common_channels[CC_idP],frameP,subframeP);

  UE_list_t *UE_list= &eNB->UE_list;
  int crnti_rx=0;
  int old_buffer_info;
  RA_TEMPLATE *RA_template = (RA_TEMPLATE *)&RC.mac[enb_mod_idP]->common_channels[CC_idP].RA_template[0];
  int first_rb = 0;

  start_meas(&eNB->rx_ulsch_sdu);

  if ((UE_id >  NUMBER_OF_UE_MAX) || (UE_id == -1)  )
    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);
  if (opt_enabled == 1) {
    trace_pdu(0, sduP,sdu_lenP, 0, 3, current_rnti, frameP, subframeP, 0,0);
    LOG_D(OPT,"[eNB %d][ULSCH] Frame %d  rnti %x  with size %d\n",
                      enb_mod_idP, frameP, current_rnti, sdu_lenP);
  }

  if (UE_id!=-1) {
    LOG_D(MAC,"[eNB %d][PUSCH %d] CC_id %d Received ULSCH sdu round %d from PHY (rnti %x, UE_id %d) ul_cqi %d\n",enb_mod_idP,harq_pid,CC_idP, UE_list->UE_sched_ctrl[UE_id].round_UL[CC_idP][harq_pid],
          current_rnti, UE_id,ul_cqi);

    AssertFatal(UE_list->UE_sched_ctrl[UE_id].round_UL[CC_idP][harq_pid] < 8,
                "round >= 8\n");
    if (sduP!=NULL) {
       UE_list->UE_sched_ctrl[UE_id].ul_inactivity_timer   = 0;
       UE_list->UE_sched_ctrl[UE_id].ul_failure_timer      = 0;
       UE_list->UE_sched_ctrl[UE_id].ul_scheduled         &= (~(1<<harq_pid));
       /* Update with smoothing: 3/4 of old value and 1/4 of new.
        * This is the logic that was done in the function
        * lte_est_timing_advance_pusch, maybe it's not necessary?
        * maybe it's even not correct at all?
        */
       UE_list->UE_sched_ctrl[UE_id].ta_update             =
           (UE_list->UE_sched_ctrl[UE_id].ta_update * 3 + timing_advance)/4;
       UE_list->UE_sched_ctrl[UE_id].pusch_snr[CC_idP]       = ul_cqi;
       UE_list->UE_sched_ctrl[UE_id].ul_consecutive_errors = 0;
       first_rb =  UE_list->UE_template[CC_idP][UE_id].first_rb_ul[harq_pid];

       if (UE_list->UE_sched_ctrl[UE_id].ul_out_of_sync > 0) {
         UE_list->UE_sched_ctrl[UE_id].ul_out_of_sync=0;
         mac_eNB_rrc_ul_in_sync(enb_mod_idP,CC_idP,frameP,subframeP,UE_RNTI(enb_mod_idP,UE_id));
       }
    }
    else { // we've got an error
      LOG_D(MAC,"[eNB %d][PUSCH %d] CC_id %d ULSCH in error in round %d, ul_cqi %d\n",enb_mod_idP,harq_pid,CC_idP,
                UE_list->UE_sched_ctrl[UE_id].round_UL[CC_idP][harq_pid],ul_cqi);

      //      AssertFatal(1==0,"ulsch in error\n");
      if (UE_list->UE_sched_ctrl[UE_id].round_UL[CC_idP][harq_pid] == 3) {
             UE_list->UE_sched_ctrl[UE_id].ul_scheduled       &= (~(1<<harq_pid));
             UE_list->UE_sched_ctrl[UE_id].round_UL[CC_idP][harq_pid]=0;
             if (UE_list->UE_sched_ctrl[UE_id].ul_consecutive_errors++ == 10)
            UE_list->UE_sched_ctrl[UE_id].ul_failure_timer = 1;
      }
      else UE_list->UE_sched_ctrl[UE_id].round_UL[CC_idP][harq_pid]++;
      return;

    }
  }
  else if ((RA_id = find_RA_id(enb_mod_idP,CC_idP,current_rnti))!=-1) { // Check if this is an RA process for the rnti
    AssertFatal(eNB->common_channels[CC_idP].radioResourceConfigCommon->rach_ConfigCommon.maxHARQ_Msg3Tx>1,
                "maxHARQ %d should be greater than 1\n",
                (int)eNB->common_channels[CC_idP].radioResourceConfigCommon->rach_ConfigCommon.maxHARQ_Msg3Tx);

    LOG_D(MAC,"[eNB %d][PUSCH %d] CC_id %d Received ULSCH sdu round %d from PHY (rnti %x, RA_id %d) ul_cqi %d\n",enb_mod_idP,harq_pid,CC_idP,
     RA_template[RA_id].msg3_round,
     current_rnti,RA_id,ul_cqi);

    first_rb                   = RA_template->msg3_first_rb;

    if (sduP==NULL) { // we've got an error on Msg3
      LOG_D(MAC,"[eNB %d] CC_id %d, RA %d ULSCH in error in round %d/%d\n",enb_mod_idP,CC_idP,RA_id,
            RA_template[RA_id].msg3_round,
            (int)eNB->common_channels[CC_idP].radioResourceConfigCommon->rach_ConfigCommon.maxHARQ_Msg3Tx);
      if (RA_template[RA_id].msg3_round == eNB->common_channels[CC_idP].radioResourceConfigCommon->rach_ConfigCommon.maxHARQ_Msg3Tx-1) {
        cancel_ra_proc(enb_mod_idP,CC_idP,frameP,current_rnti);
      }

      else {
        first_rb =  UE_list->UE_template[CC_idP][UE_id].first_rb_ul[harq_pid];
        RA_template[RA_id].msg3_round++;
        // prepare handling of retransmission
        RA_template[RA_id].Msg3_frame += ((RA_template[RA_id].Msg3_subframe>1) ? 1 : 0);
        RA_template[RA_id].Msg3_subframe = (RA_template[RA_id].Msg3_subframe+8)%10;
        add_msg3(enb_mod_idP,CC_idP, &RA_template[RA_id],frameP,subframeP);
      }
      return;
    }
  }
  else  {
    LOG_W(MAC,"Cannot find UE or RA corresponding to ULSCH rnti %x, dropping it\n", current_rnti);
    return;
  }
  payload_ptr = parse_ulsch_header(sduP,&num_ce,&num_sdu,rx_ces,rx_lcids,rx_lengths,sdu_lenP);

  T(T_ENB_MAC_UE_UL_PDU, T_INT(enb_mod_idP), T_INT(CC_idP), T_INT(current_rnti), T_INT(frameP), T_INT(subframeP),
    T_INT(harq_pid), T_INT(sdu_lenP), T_INT(num_ce), T_INT(num_sdu));
  T(T_ENB_MAC_UE_UL_PDU_WITH_DATA, T_INT(enb_mod_idP), T_INT(CC_idP), T_INT(current_rnti), T_INT(frameP), T_INT(subframeP),
    T_INT(harq_pid), T_INT(sdu_lenP), T_INT(num_ce), T_INT(num_sdu), T_BUFFER(sduP, sdu_lenP));

  eNB->eNB_stats[CC_idP].ulsch_bytes_rx=sdu_lenP;
  eNB->eNB_stats[CC_idP].total_ulsch_bytes_rx+=sdu_lenP;
  eNB->eNB_stats[CC_idP].total_ulsch_pdus_rx+=1;

  UE_list->UE_sched_ctrl[UE_id].round_UL[CC_idP][harq_pid] = 0;

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

    T(T_ENB_MAC_UE_UL_CE, T_INT(enb_mod_idP), T_INT(CC_idP), T_INT(current_rnti), T_INT(frameP), T_INT(subframeP),
      T_INT(rx_ces[i]));

    switch (rx_ces[i]) { // implement and process BSR + CRNTI +
    case POWER_HEADROOM:
      if (UE_id != -1) {
        UE_list->UE_template[CC_idP][UE_id].phr_info =  (payload_ptr[0] & 0x3f) - PHR_MAPPING_OFFSET;
        LOG_D(MAC, "[eNB %d] CC_id %d MAC CE_LCID %d : Received PHR PH = %d (db)\n",
              enb_mod_idP, CC_idP, rx_ces[i], UE_list->UE_template[CC_idP][UE_id].phr_info);
        UE_list->UE_template[CC_idP][UE_id].phr_info_configured=1;
        UE_list->UE_sched_ctrl[UE_id].phr_received = 1;
      }
      payload_ptr+=sizeof(POWER_HEADROOM_CMD);
      break;

    case CRNTI: {
      int old_rnti = (((uint16_t)payload_ptr[0])<<8) + payload_ptr[1];
      int old_UE_id = find_UE_id(enb_mod_idP, old_rnti);
      LOG_D(MAC, "[eNB %d] Frame %d, Subframe %d CC_id %d MAC CE_LCID %d (ce %d/%d): CRNTI %x (UE_id %d) in Msg3\n",
            enb_mod_idP, frameP, subframeP, CC_idP, rx_ces[i], i, num_ce, old_rnti, old_UE_id);
      if (old_UE_id != -1) {
        /* TODO: if the UE did random access (followed by a MAC uplink with
         * CRNTI) because none of its scheduling request was granted, then
         * according to 36.321 5.4.4 the UE's MAC will notify RRC to release
         * PUCCH/SRS. According to 36.331 5.3.13 the UE will then apply
         * default configuration for CQI reporting and scheduling requests,
         * which basically means that the CQI requests won't work anymore and
         * that the UE won't do any scheduling request anymore as long as the
         * eNB doesn't reconfigure the UE.
         * We have to take care of this. As the code is, nothing is done and
         * the UE state in the eNB is wrong.
         */
        UE_id = old_UE_id;
        UE_list->UE_sched_ctrl[UE_id].ul_inactivity_timer = 0;
        UE_list->UE_sched_ctrl[UE_id].ul_failure_timer    = 0;
        if (UE_list->UE_sched_ctrl[UE_id].ul_out_of_sync > 0) {
          UE_list->UE_sched_ctrl[UE_id].ul_out_of_sync = 0;
          mac_eNB_rrc_ul_in_sync(enb_mod_idP, CC_idP, frameP, subframeP, old_rnti);
        }
        /* receiving CRNTI means that the current rnti has to go away */
        cancel_ra_proc(enb_mod_idP,CC_idP,frameP,current_rnti);
        current_rnti = old_rnti;
      }
      crnti_rx=1;
      payload_ptr+=2;
      break;
    }

    case TRUNCATED_BSR:
    case SHORT_BSR: {
      uint8_t lcgid;
      lcgid = (payload_ptr[0] >> 6);

      LOG_D(MAC, "[eNB %d] CC_id %d MAC CE_LCID %d : Received short BSR LCGID = %u bsr = %d\n",
            enb_mod_idP, CC_idP, rx_ces[i], lcgid, payload_ptr[0] & 0x3f);

      if (crnti_rx==1)
        LOG_D(MAC, "[eNB %d] CC_id %d MAC CE_LCID %d : Received short BSR LCGID = %u bsr = %d\n",
              enb_mod_idP, CC_idP, rx_ces[i], lcgid, payload_ptr[0] & 0x3f);
      if (UE_id  != -1) {

        UE_list->UE_template[CC_idP][UE_id].bsr_info[lcgid] = (payload_ptr[0] & 0x3f);

        // update buffer info

        UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[lcgid]=BSR_TABLE[UE_list->UE_template[CC_idP][UE_id].bsr_info[lcgid]];

        UE_list->UE_template[CC_idP][UE_id].ul_total_buffer= UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[lcgid];

        RC.eNB[enb_mod_idP][CC_idP]->pusch_stats_bsr[UE_id][(frameP*10)+subframeP] = (payload_ptr[0] & 0x3f);
        if (UE_id == UE_list->head)
          VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME(VCD_SIGNAL_DUMPER_VARIABLES_UE0_BSR,RC.eNB[enb_mod_idP][CC_idP]->pusch_stats_bsr[UE_id][(frameP*10)+subframeP]);
        if (UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[lcgid] == 0 ) {
          UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[lcgid]=frameP;
        }
        if (mac_eNB_get_rrc_status(enb_mod_idP,UE_RNTI(enb_mod_idP,UE_id)) < RRC_CONNECTED)
          LOG_D(MAC, "[eNB %d] CC_id %d MAC CE_LCID %d : ul_total_buffer = %d (lcg increment %d)\n",
                enb_mod_idP, CC_idP, rx_ces[i], UE_list->UE_template[CC_idP][UE_id].ul_total_buffer,
                UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[lcgid]);
      }
      else {

      }
      payload_ptr += 1;//sizeof(SHORT_BSR); // fixme
    }
    break;

    case LONG_BSR:
      if (UE_id  != -1) {
        UE_list->UE_template[CC_idP][UE_id].bsr_info[LCGID0] = ((payload_ptr[0] & 0xFC) >> 2);
        UE_list->UE_template[CC_idP][UE_id].bsr_info[LCGID1] =
          ((payload_ptr[0] & 0x03) << 4) | ((payload_ptr[1] & 0xF0) >> 4);
        UE_list->UE_template[CC_idP][UE_id].bsr_info[LCGID2] =
          ((payload_ptr[1] & 0x0F) << 2) | ((payload_ptr[2] & 0xC0) >> 6);
        UE_list->UE_template[CC_idP][UE_id].bsr_info[LCGID3] = (payload_ptr[2] & 0x3F);

        // update buffer info
        old_buffer_info = UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID0];
        UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID0]=BSR_TABLE[UE_list->UE_template[CC_idP][UE_id].bsr_info[LCGID0]];

        UE_list->UE_template[CC_idP][UE_id].ul_total_buffer+= UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID0];
        if (UE_list->UE_template[CC_idP][UE_id].ul_total_buffer >= old_buffer_info)
          UE_list->UE_template[CC_idP][UE_id].ul_total_buffer -= old_buffer_info;
        else
          UE_list->UE_template[CC_idP][UE_id].ul_total_buffer = 0;

        old_buffer_info = UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID1];
        UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID1]=BSR_TABLE[UE_list->UE_template[CC_idP][UE_id].bsr_info[LCGID1]];
        UE_list->UE_template[CC_idP][UE_id].ul_total_buffer+= UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID1];
        if (UE_list->UE_template[CC_idP][UE_id].ul_total_buffer >= old_buffer_info)
          UE_list->UE_template[CC_idP][UE_id].ul_total_buffer -= old_buffer_info;
        else
          UE_list->UE_template[CC_idP][UE_id].ul_total_buffer = 0;

        old_buffer_info = UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID2];
        UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID2]=BSR_TABLE[UE_list->UE_template[CC_idP][UE_id].bsr_info[LCGID2]];
        UE_list->UE_template[CC_idP][UE_id].ul_total_buffer+= UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID2];
        if (UE_list->UE_template[CC_idP][UE_id].ul_total_buffer >= old_buffer_info)
          UE_list->UE_template[CC_idP][UE_id].ul_total_buffer -= old_buffer_info;
        else
          UE_list->UE_template[CC_idP][UE_id].ul_total_buffer = 0;

        old_buffer_info = UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID3];
        UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID3]=BSR_TABLE[UE_list->UE_template[CC_idP][UE_id].bsr_info[LCGID3]];
        UE_list->UE_template[CC_idP][UE_id].ul_total_buffer+= UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID3];
        if (UE_list->UE_template[CC_idP][UE_id].ul_total_buffer >= old_buffer_info)
          UE_list->UE_template[CC_idP][UE_id].ul_total_buffer -= old_buffer_info;
        else
          UE_list->UE_template[CC_idP][UE_id].ul_total_buffer = 0;

        LOG_D(MAC, "[eNB %d] CC_id %d MAC CE_LCID %d: Received long BSR LCGID0 = %u LCGID1 = "
              "%u LCGID2 = %u LCGID3 = %u\n",
              enb_mod_idP, CC_idP,
              rx_ces[i],
              UE_list->UE_template[CC_idP][UE_id].bsr_info[LCGID0],
              UE_list->UE_template[CC_idP][UE_id].bsr_info[LCGID1],
              UE_list->UE_template[CC_idP][UE_id].bsr_info[LCGID2],
              UE_list->UE_template[CC_idP][UE_id].bsr_info[LCGID3]);
      if (crnti_rx==1)
        LOG_D(MAC, "[eNB %d] CC_id %d MAC CE_LCID %d: Received long BSR LCGID0 = %u LCGID1 = "
              "%u LCGID2 = %u LCGID3 = %u\n",
              enb_mod_idP, CC_idP,
              rx_ces[i],
              UE_list->UE_template[CC_idP][UE_id].bsr_info[LCGID0],
              UE_list->UE_template[CC_idP][UE_id].bsr_info[LCGID1],
              UE_list->UE_template[CC_idP][UE_id].bsr_info[LCGID2],
              UE_list->UE_template[CC_idP][UE_id].bsr_info[LCGID3]);

        if (UE_list->UE_template[CC_idP][UE_id].bsr_info[LCGID0] == 0 ) {
          UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[LCGID0]=0;
        } else if (UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[LCGID0] == 0) {
          UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[LCGID0]=frameP;
        }

        if (UE_list->UE_template[CC_idP][UE_id].bsr_info[LCGID1] == 0 ) {
          UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[LCGID1]=0;
        } else if (UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[LCGID1] == 0) {
          UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[LCGID1]=frameP;
        }

        if (UE_list->UE_template[CC_idP][UE_id].bsr_info[LCGID2] == 0 ) {
          UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[LCGID2]=0;
        } else if (UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[LCGID2] == 0) {
          UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[LCGID2]=frameP;
        }

        if (UE_list->UE_template[CC_idP][UE_id].bsr_info[LCGID3] == 0 ) {
          UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[LCGID3]= 0;
        } else if (UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[LCGID3] == 0) {
          UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[LCGID3]=frameP;

        }
      }

      payload_ptr += 3;////sizeof(LONG_BSR);
      break;

    default:
      LOG_E(MAC, "[eNB %d] CC_id %d Received unknown MAC header (0x%02x)\n", enb_mod_idP, CC_idP, 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]);

    T(T_ENB_MAC_UE_UL_SDU, T_INT(enb_mod_idP), T_INT(CC_idP), T_INT(current_rnti), T_INT(frameP), T_INT(subframeP),
      T_INT(rx_lcids[i]), T_INT(rx_lengths[i]));
    T(T_ENB_MAC_UE_UL_SDU_WITH_DATA, T_INT(enb_mod_idP), T_INT(CC_idP), T_INT(current_rnti), T_INT(frameP), T_INT(subframeP),
      T_INT(rx_lcids[i]), T_INT(rx_lengths[i]), T_BUFFER(payload_ptr, rx_lengths[i]));

    switch (rx_lcids[i]) {
    case CCCH :
      if (rx_lengths[i] > CCCH_PAYLOAD_SIZE_MAX) {
        LOG_E(MAC, "[eNB %d/%d] frame %d received CCCH of size %d (too big, maximum allowed is %d, sdu_len %d), dropping packet\n",
              enb_mod_idP, CC_idP, frameP, rx_lengths[i], CCCH_PAYLOAD_SIZE_MAX,sdu_lenP);
        break;
      }
      LOG_D(MAC,"[eNB %d][RAPROC] CC_id %d Frame %d, Received CCCH:  %x.%x.%x.%x.%x.%x, Terminating RA procedure for UE rnti %x\n",
            enb_mod_idP,CC_idP,frameP,
            payload_ptr[0],payload_ptr[1],payload_ptr[2],payload_ptr[3],payload_ptr[4], payload_ptr[5], current_rnti);
      VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_TERMINATE_RA_PROC,1);
      VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_TERMINATE_RA_PROC,0);
      for (ii=0; ii<NB_RA_PROC_MAX; ii++) {
        RA_TEMPLATE *RA_template = &eNB->common_channels[CC_idP].RA_template[ii];

        LOG_D(MAC,"[eNB %d][RAPROC] CC_id %d Checking proc %d : rnti (%x, %x), active %d\n",
              enb_mod_idP, CC_idP, ii,
              RA_template->rnti, current_rnti,
              RA_template->RA_active);

        if ((RA_template->rnti==current_rnti) &&
            (RA_template->RA_active==TRUE)) {

          //payload_ptr = parse_ulsch_header(msg3,&num_ce,&num_sdu,rx_ces,rx_lcids,rx_lengths,msg3_len);

          if (UE_id < 0) {
            memcpy(&RA_template->cont_res_id[0],payload_ptr,6);
            LOG_D(MAC,"[eNB %d][RAPROC] CC_id %d Frame %d CCCH: Received Msg3: length %d, offset %ld\n",
                  enb_mod_idP,CC_idP,frameP,rx_lengths[i],payload_ptr-sduP);

            if ((UE_id=add_new_ue(enb_mod_idP,CC_idP,eNB->common_channels[CC_idP].RA_template[ii].rnti,harq_pid
                      #ifdef Rel14
                        ,eNB->common_channels[CC_idP].RA_template[ii].rach_resource_type
                      #endif
                      )) == -1 ) {
              AssertFatal(1==0,"[MAC][eNB] Max user count reached\n");
              // kill RA procedure
            } else
              LOG_D(MAC,"[eNB %d][RAPROC] CC_id %d Frame %d Added user with rnti %x => UE %d\n",
                    enb_mod_idP,CC_idP,frameP,RA_template->rnti,UE_id);
          } else {
            LOG_D(MAC,"[eNB %d][RAPROC] CC_id %d Frame %d CCCH: Received Msg3 from already registered UE %d: length %d, offset %ld\n",
                  enb_mod_idP,CC_idP,frameP,UE_id,rx_lengths[i],payload_ptr-sduP);
            // kill RA procedure
          }

          mac_rrc_data_ind(
                           enb_mod_idP,
                           CC_idP,
                           frameP,subframeP,
                           current_rnti,
                           CCCH,
                           (uint8_t*)payload_ptr,
                           rx_lengths[i],
                           ENB_FLAG_YES,
                           enb_mod_idP,
                           0
                           );


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

          // prepare transmission of Msg4
          RA_template->generate_Msg4 = 1;
          RA_template->wait_ack_Msg4 = 0;



          // Program Msg4 PDCCH+DLSCH/MPDCCH transmission 4 subframes from now, // Check if this is ok for BL/CE, or if the rule is different
          RA_template->Msg4_frame    = frameP + ((subframeP>5) ? 1 : 0);
          RA_template->Msg4_subframe = (subframeP+4)%10;

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

      break ;

    case DCCH :
    case DCCH1 :
      //      if(eNB_mac_inst[module_idP][CC_idP].Dcch_lchan[UE_id].Active==1){


#if defined(ENABLE_MAC_PAYLOAD_DEBUG)
      LOG_T(MAC,"offset: %d\n",(unsigned char)((unsigned char*)payload_ptr-sduP));
      for (j=0; j<32; j++) {
        LOG_T(MAC,"%x ",payload_ptr[j]);
      }
      LOG_T(MAC,"\n");
#endif

      if (UE_id != -1) {
        // adjust buffer occupancy of the correponding logical channel group
        if (UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[UE_list->UE_template[CC_idP][UE_id].lcgidmap[rx_lcids[i]]] >= rx_lengths[i])
          UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[UE_list->UE_template[CC_idP][UE_id].lcgidmap[rx_lcids[i]]] -= rx_lengths[i];
        else
          UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[UE_list->UE_template[CC_idP][UE_id].lcgidmap[rx_lcids[i]]] = 0;

          LOG_D(MAC,"[eNB %d] CC_id %d Frame %d : ULSCH -> UL-DCCH, received %d bytes form UE %d on LCID %d \n",
                enb_mod_idP,CC_idP,frameP, rx_lengths[i], UE_id, rx_lcids[i]);

          mac_rlc_data_ind(
                           enb_mod_idP,
                           current_rnti,
                           enb_mod_idP,
                           frameP,
                           ENB_FLAG_YES,
                           MBMS_FLAG_NO,
                           rx_lcids[i],
                           (char *)payload_ptr,
                           rx_lengths[i],
                           1,
                           NULL);//(unsigned int*)crc_status);
          UE_list->eNB_UE_stats[CC_idP][UE_id].num_pdu_rx[rx_lcids[i]]+=1;
          UE_list->eNB_UE_stats[CC_idP][UE_id].num_bytes_rx[rx_lcids[i]]+=rx_lengths[i];


      } /* UE_id != -1 */


      // }
      break;

      // all the DRBS
    case DTCH:
    default :

#if defined(ENABLE_MAC_PAYLOAD_DEBUG)
      LOG_T(MAC,"offset: %d\n",(unsigned char)((unsigned char*)payload_ptr-sduP));
      for (j=0; j<32; j++) {
        LOG_T(MAC,"%x ",payload_ptr[j]);
      }
      LOG_T(MAC,"\n");
#endif
      if (rx_lcids[i]  < NB_RB_MAX ) {
        LOG_D(MAC,"[eNB %d] CC_id %d Frame %d : ULSCH -> UL-DTCH, received %d bytes from UE %d for lcid %d\n",
              enb_mod_idP,CC_idP,frameP, rx_lengths[i], UE_id, rx_lcids[i]);

        if (UE_id != -1) {
          // adjust buffer occupancy of the correponding logical channel group
          LOG_D(MAC,"[eNB %d] CC_id %d Frame %d : ULSCH -> UL-DTCH, received %d bytes from UE %d for lcid %d, removing from LCGID %ld, %d\n",
                enb_mod_idP,CC_idP,frameP, rx_lengths[i], UE_id,rx_lcids[i],
                UE_list->UE_template[CC_idP][UE_id].lcgidmap[rx_lcids[i]],
                UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[UE_list->UE_template[CC_idP][UE_id].lcgidmap[rx_lcids[i]]]);

          if (UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[UE_list->UE_template[CC_idP][UE_id].lcgidmap[rx_lcids[i]]] >= rx_lengths[i])
            UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[UE_list->UE_template[CC_idP][UE_id].lcgidmap[rx_lcids[i]]] -= rx_lengths[i];
          else
            UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[UE_list->UE_template[CC_idP][UE_id].lcgidmap[rx_lcids[i]]] = 0;
          if ((rx_lengths[i] <SCH_PAYLOAD_SIZE_MAX) &&  (rx_lengths[i] > 0) ) {   // MAX SIZE OF transport block
            mac_rlc_data_ind(
                             enb_mod_idP,
                             current_rnti,
                             enb_mod_idP,
                             frameP,
                             ENB_FLAG_YES,
                             MBMS_FLAG_NO,
                             rx_lcids[i],
                             (char *)payload_ptr,
                             rx_lengths[i],
                             1,
                             NULL);//(unsigned int*)crc_status);

            UE_list->eNB_UE_stats[CC_idP][UE_id].num_pdu_rx[rx_lcids[i]]+=1;
            UE_list->eNB_UE_stats[CC_idP][UE_id].num_bytes_rx[rx_lcids[i]]+=rx_lengths[i];
          }
          else { /* rx_length[i] */
            UE_list->eNB_UE_stats[CC_idP][UE_id].num_errors_rx+=1;
            LOG_E(MAC,"[eNB %d] CC_id %d Frame %d : Max size of transport block reached LCID %d from UE %d ",
                  enb_mod_idP, CC_idP, frameP, rx_lcids[i], UE_id);
          }
        }
        else {/*(UE_id != -1*/
          LOG_E(MAC,"[eNB %d] CC_id %d Frame %d : received unsupported or unknown LCID %d from UE %d ",
                enb_mod_idP, CC_idP, frameP, rx_lcids[i], UE_id);
        }
      }

      break;
    }

    payload_ptr+=rx_lengths[i];
  }

  // Program ACK for PHICH
  LOG_D(MAC,"Programming PHICH ACK for rnti %x harq_pid %d (first_rb %d)\n",current_rnti,harq_pid,first_rb);
  nfapi_hi_dci0_request_body_t   *hi_dci0_req = &eNB->HI_DCI0_req[CC_idP].hi_dci0_request_body;
  nfapi_hi_dci0_request_pdu_t    *hi_dci0_pdu = &hi_dci0_req->hi_dci0_pdu_list[hi_dci0_req->number_of_dci+hi_dci0_req->number_of_hi];
  memset((void*)hi_dci0_pdu,0,sizeof(nfapi_hi_dci0_request_pdu_t));
  hi_dci0_pdu->pdu_type                                               = NFAPI_HI_DCI0_HI_PDU_TYPE;
  hi_dci0_pdu->pdu_size                                               = 2+sizeof(nfapi_hi_dci0_hi_pdu);
  hi_dci0_pdu->hi_pdu.hi_pdu_rel8.resource_block_start                = first_rb;
  hi_dci0_pdu->hi_pdu.hi_pdu_rel8.cyclic_shift_2_for_drms             = 0;
  hi_dci0_pdu->hi_pdu.hi_pdu_rel8.hi_value                            = 1;
  hi_dci0_req->number_of_hi++;

  /* NN--> FK: we could either check the payload, or use a phy helper to detect a false msg3 */
  if ((num_sdu == 0) && (num_ce==0)) {
    if (UE_id != -1)
      UE_list->eNB_UE_stats[CC_idP][UE_id].total_num_errors_rx+=1;
    /*
    if (msg3_flagP != NULL) {
      if( *msg3_flagP == 1 ) {
        LOG_N(MAC,"[eNB %d] CC_id %d frame %d : false msg3 detection: signal phy to canceling RA and remove the UE\n", enb_mod_idP, CC_idP, frameP);
        *msg3_flagP=0;
      }
      }*/
  } else {
    if (UE_id != -1) {
      UE_list->eNB_UE_stats[CC_idP][UE_id].pdu_bytes_rx=sdu_lenP;
      UE_list->eNB_UE_stats[CC_idP][UE_id].total_pdu_bytes_rx+=sdu_lenP;
      UE_list->eNB_UE_stats[CC_idP][UE_id].total_num_pdus_rx+=1;
    }
  }

  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_RX_SDU,0);
  stop_meas(&eNB->rx_ulsch_sdu);
}

uint32_t bytes_to_bsr_index(int32_t nbytes)
{
  uint32_t i=0;

  if (nbytes<0) {
    return(0);
  }

  while ((i<BSR_TABLE_SIZE)&&
         (BSR_TABLE[i]<=nbytes)) {
    i++;
  }

  return(i-1);
}

void add_ue_ulsch_info(module_id_t module_idP, int CC_id, int UE_id, sub_frame_t subframeP, UE_ULSCH_STATUS status)
{
  eNB_ulsch_info[module_idP][CC_id][UE_id].rnti             = UE_RNTI(module_idP,UE_id);
  eNB_ulsch_info[module_idP][CC_id][UE_id].subframe         = subframeP;
  eNB_ulsch_info[module_idP][CC_id][UE_id].status           = status;

  eNB_ulsch_info[module_idP][CC_id][UE_id].serving_num++;
}

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 %ld)\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+=3;
        } else if (lcid==CRNTI) {
          ce_len+=2;
        } else if ((lcid==POWER_HEADROOM) || (lcid==TRUNCATED_BSR)|| (lcid== SHORT_BSR)) {
          ce_len++;
        } else {
          LOG_E(MAC,"unknown CE %d \n", lcid);
          AssertFatal(1==0,"unknown CE");
        }
      }
    }
  }

  *num_ce = num_ces;
  *num_sdu = num_sdus;

  return(mac_header_ptr);
}

/* This function is called by PHY layer when it schedules some
 * uplink for a random access message 3.
 * The MAC scheduler has to skip the RBs used by this message 3
 * (done below in schedule_ulsch).
 */
void set_msg3_subframe(module_id_t Mod_id,
                       int CC_id,
                       int frame,
                       int subframe,
                       int rnti,
                       int Msg3_frame,
                       int Msg3_subframe)
{
  eNB_MAC_INST *eNB=RC.mac[Mod_id];
  int i;
  for (i=0; i<NB_RA_PROC_MAX; i++) {
    if (eNB->common_channels[CC_id].RA_template[i].RA_active == TRUE &&
        eNB->common_channels[CC_id].RA_template[i].rnti == rnti) {
      eNB->common_channels[CC_id].RA_template[i].Msg3_subframe = Msg3_subframe;
      break;
    }
  }
}


void schedule_ulsch(module_id_t module_idP,
                    frame_t frameP,
                    sub_frame_t subframeP)
{
  uint16_t first_rb[MAX_NUM_CCs],i;
  int CC_id;
  eNB_MAC_INST *eNB=RC.mac[module_idP];
  COMMON_channels_t *cc;

  start_meas(&eNB->schedule_ulsch);

  int sched_subframe = (subframeP+4)%10;

  cc = &eNB->common_channels[0];
  int tdd_sfa;
  // for TDD: check subframes where we have to act and return if nothing should be done now
  if (cc->tdd_Config) {
    tdd_sfa = cc->tdd_Config->subframeAssignment;
    switch (subframeP) {
    case 0:
      if ((tdd_sfa == 0)||
          (tdd_sfa == 3)||
          (tdd_sfa == 6)) sched_subframe = 4;
      else return;
      break;
    case 1:
      if ((tdd_sfa==0)||
          (tdd_sfa==1)) sched_subframe = 7;
      else if (tdd_sfa==6) sched_subframe = 8;
      break;
    default:
      return;

    case 2: // Don't schedule UL in subframe 2 for TDD
      return;
    case 3:
      if (tdd_sfa==2) sched_subframe = 7;
      else return;
      break;
    case 4:
      if (tdd_sfa==1) sched_subframe = 8;
      else return;
      break;
    case 5:
      if (tdd_sfa==0)      sched_subframe = 9;
      else if (tdd_sfa==6) sched_subframe = 3;
      else return;
      break;
    case 6:
      if (tdd_sfa==1)      sched_subframe = 2;
      else if (tdd_sfa==6) sched_subframe = 3;
      else return;
      break;
    case 7:
      return;
    case 8:
      if ((tdd_sfa>=2) || (tdd_sfa<=5)) sched_subframe=2;
      else return;
      break;
    case 9:
      if ((tdd_sfa==1) || (tdd_sfa==3) || (tdd_sfa==4)) sched_subframe=3;
      else if (tdd_sfa==6) sched_subframe=4;
      else return;
      break;
    }
  }
  for (CC_id=0; CC_id<MAX_NUM_CCs; CC_id++) {



    //leave out first RB for PUCCH
    first_rb[CC_id] = 1;

    // UE data info;
    // check which UE has data to transmit
    // function to decide the scheduling
    // e.g. scheduling_rslt = Greedy(granted_UEs, nb_RB)

    // default function for default scheduling
    //

    // output of scheduling, the UE numbers in RBs, where it is in the code???
    // check if RA (Msg3) is active in this subframeP, if so skip the PRBs used for Msg3
    // Msg3 is using 1 PRB so we need to increase first_rb accordingly
    // not sure about the break (can there be more than 1 active RA procedure?)