eNB_scheduler_ulsch.c 51.8 KB
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/*
 * 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
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 * the OAI Public License, Version 1.1  (the "License"); you may not use this file
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 * 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
 */
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/*! \file eNB_scheduler_ulsch.c
 * \brief eNB procedures for the ULSCH transport channel
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 * \author Navid Nikaein and Raymond Knopp
 * \date 2010 - 2014
 * \email: navid.nikaein@eurecom.fr
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 * \version 1.0
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 * @ingroup _mac

 */

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/* indented with: indent -kr eNB_scheduler_RA.c */

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#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)
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#include "intertask_interface.h"
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#endif

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#include "T.h"

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#define ENABLE_MAC_PAYLOAD_DEBUG
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#define DEBUG_eNB_SCHEDULER 1

// This table holds the allowable PRB sizes for ULSCH transmissions
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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)
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{
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    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 *mac = RC.mac[enb_mod_idP];
    int harq_pid =
	subframe2harqpid(&mac->common_channels[CC_idP], frameP, subframeP);

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

    start_meas(&mac->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);
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    }
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    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;
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            if (UE_list->UE_sched_ctrl[UE_id].ul_failure_timer > 0) {
              LOG_I(MAC, "UE %d rnti %x: UL Failure timer %d clear to 0\n", UE_id, rntiP,
              UE_list->UE_sched_ctrl[UE_id].ul_failure_timer);
            }
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	    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(mac->common_channels[CC_idP].
		    radioResourceConfigCommon->rach_ConfigCommon.
		    maxHARQ_Msg3Tx > 1,
		    "maxHARQ %d should be greater than 1\n",
		    (int) mac->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[RA_id].msg3_round,
	      current_rnti, RA_id, ul_cqi);

	first_rb = ra->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[RA_id].msg3_round,
		  (int) mac->common_channels[CC_idP].
		  radioResourceConfigCommon->rach_ConfigCommon.
		  maxHARQ_Msg3Tx);
	    if (ra[RA_id].msg3_round ==
		mac->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[RA_id].msg3_round++;
		// prepare handling of retransmission
		ra[RA_id].Msg3_frame +=
		    ((ra[RA_id].Msg3_subframe > 1) ? 1 : 0);
		ra[RA_id].Msg3_subframe =
		    (ra[RA_id].Msg3_subframe + 8) % 10;
		add_msg3(enb_mod_idP, CC_idP, &ra[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;
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    }
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    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));

    mac->eNB_stats[CC_idP].ulsch_bytes_rx = sdu_lenP;
    mac->eNB_stats[CC_idP].total_ulsch_bytes_rx += sdu_lenP;
    mac->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);
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		/* receiving CRNTI means that the current rnti has to go away */
		cancel_ra_proc(enb_mod_idP, CC_idP, frameP,
			       current_rnti);
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		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;
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                    if (UE_list->UE_sched_ctrl[UE_id].ul_failure_timer > 0) {
                      LOG_I(MAC, "UE %d rnti %x: UL Failure timer %d clear to 0\n", UE_id, old_rnti,
                      UE_list->UE_sched_ctrl[UE_id].ul_failure_timer);
                    }
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		    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);
		    }
		    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;
	}
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    }
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    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_t *ra = &mac->common_channels[CC_idP].ra[ii];

		LOG_D(MAC,
		      "[mac %d][RAPROC] CC_id %d Checking proc %d : rnti (%x, %x), state %d\n",
		      enb_mod_idP, CC_idP, ii, ra->rnti,
		      current_rnti, ra->state);

		if ((ra->rnti == current_rnti) && (ra->state != IDLE)) {

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

		    if (UE_id < 0) {
			memcpy(&ra->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,
					mac->common_channels[CC_idP].
					ra[ii].rnti, harq_pid
#ifdef Rel14
					,
					mac->common_channels[CC_idP].
					ra[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->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->state = MSG4;



		    // 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->Msg4_frame = frameP + ((subframeP > 5) ? 1 : 0);
		    ra->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){
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#if defined(ENABLE_MAC_PAYLOAD_DEBUG)
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	    LOG_T(MAC, "offset: %d\n",
		  (unsigned char) ((unsigned char *) payload_ptr - sduP));
	    for (j = 0; j < 32; j++) {
		LOG_T(MAC, "%x ", payload_ptr[j]);
	    }
	    LOG_T(MAC, "\n");
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#endif
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	    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:
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#if defined(ENABLE_MAC_PAYLOAD_DEBUG)
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	    LOG_T(MAC, "offset: %d\n",
		  (unsigned char) ((unsigned char *) payload_ptr - sduP));
	    for (j = 0; j < 32; j++) {
		LOG_T(MAC, "%x ", payload_ptr[j]);
	    }
	    LOG_T(MAC, "\n");
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#endif
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	    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];
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                        //clear uplane_inactivity_timer
	                UE_list->UE_sched_ctrl[UE_id].uplane_inactivity_timer = 0;
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		    } 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];
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    }
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    // 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 =
	&mac->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;
	}
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    }
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    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME
	(VCD_SIGNAL_DUMPER_FUNCTIONS_RX_SDU, 0);
    stop_meas(&mac->rx_ulsch_sdu);
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}

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uint32_t bytes_to_bsr_index(int32_t nbytes)
{
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    uint32_t i = 0;
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    if (nbytes < 0) {
	return (0);
    }
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    while ((i < BSR_TABLE_SIZE) && (BSR_TABLE[i] <= nbytes)) {
	i++;
    }
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    return (i - 1);
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}

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void
add_ue_ulsch_info(module_id_t module_idP, int CC_id, int UE_id,
		  sub_frame_t subframeP, UE_ULSCH_STATUS status)
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{
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    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;
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    eNB_ulsch_info[module_idP][CC_id][UE_id].serving_num++;
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}

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

    while (not_done == 1) {

	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");
		}
	    }
	}
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    }
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    *num_ce = num_ces;
    *num_sdu = num_sdus;
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    return (mac_header_ptr);
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}

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/* 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).
 */
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void
set_msg3_subframe(module_id_t Mod_id,
		  int CC_id,
		  int frame,
		  int subframe, int rnti, int Msg3_frame,
		  int Msg3_subframe)
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    eNB_MAC_INST *mac = RC.mac[Mod_id];
    int i;
    for (i = 0; i < NB_RA_PROC_MAX; i++) {
	if (mac->common_channels[CC_id].ra[i].state != IDLE &&
	    mac->common_channels[CC_id].ra[i].rnti == rnti) {
	    mac->common_channels[CC_id].ra[i].Msg3_subframe =
		Msg3_subframe;
	    break;
	}
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    }
}
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void
schedule_ulsch(module_id_t module_idP, frame_t frameP,
	       sub_frame_t subframeP)
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{
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    uint16_t first_rb[MAX_NUM_CCs], i;
    int CC_id;
    eNB_MAC_INST *mac = RC.mac[module_idP];
    COMMON_channels_t *cc;

    start_meas(&mac->schedule_ulsch);

    int sched_subframe = (subframeP + 4) % 10;

    cc = &mac->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;
	}
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    }
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    for (CC_id = 0; CC_id < MAX_NUM_CCs; CC_id++) {
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	//leave out first RB for PUCCH
	first_rb[CC_id] = 1;
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	// UE data info;
	// check which UE has data to transmit
	// function to decide the scheduling
	// e.g. scheduling_rslt = Greedy(granted_UEs, nb_RB)
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	// default function for default scheduling
	//
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	// 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?)
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	for (i = 0; i < NB_RA_PROC_MAX; i++) {
	    if ((cc->ra[i].state == WAITMSG3) &&
		(cc->ra[i].Msg3_subframe == sched_subframe)) {
		first_rb[CC_id]++;
		//    cc->ray[i].Msg3_subframe = -1;
		break;
	    }
	}
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    }
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    schedule_ulsch_rnti(module_idP, frameP, subframeP, sched_subframe,
			first_rb);
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    stop_meas(&mac->schedule_ulsch);
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}

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void
schedule_ulsch_rnti(module_id_t module_idP,
		    frame_t frameP,
		    sub_frame_t subframeP,
		    unsigned char sched_subframeP, uint16_t * first_rb)
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    int UE_id;
    uint8_t aggregation = 2;
    rnti_t rnti = -1;
    uint8_t round = 0;
    uint8_t harq_pid = 0;
    uint8_t status = 0;
    uint8_t rb_table_index = -1;
    uint32_t cqi_req, cshift, ndi, tpc;
    int32_t normalized_rx_power;
    int32_t target_rx_power = -90;
    static int32_t tpc_accumulated = 0;
    int n;
    int CC_id = 0;
    int drop_ue = 0;
    int N_RB_UL;
    eNB_MAC_INST *mac = RC.mac[module_idP];
    COMMON_channels_t *cc = mac->common_channels;
    UE_list_t *UE_list = &mac->UE_list;
    UE_TEMPLATE *UE_template;
    UE_sched_ctrl *UE_sched_ctrl;
    int sched_frame = frameP;
    int rvidx_tab[4] = { 0, 2, 3, 1 };

    if (sched_subframeP < subframeP)
	sched_frame++;

    nfapi_hi_dci0_request_body_t *hi_dci0_req =
	&mac->HI_DCI0_req[CC_id].hi_dci0_request_body;
    nfapi_hi_dci0_request_pdu_t *hi_dci0_pdu;

    nfapi_ul_config_request_body_t *ul_req_tmp =
	&mac->UL_req_tmp[CC_id][sched_subframeP].ul_config_request_body;

    LOG_D(MAC, "entering ulsch preprocesor\n");
    ulsch_scheduler_pre_processor(module_idP, frameP, subframeP, first_rb);

    LOG_D(MAC, "exiting ulsch preprocesor\n");

    mac->HI_DCI0_req[CC_id].sfn_sf = (frameP << 4) + subframeP;

    // loop over all active UEs
    for (UE_id = UE_list->head_ul; UE_id >= 0;
	 UE_id = UE_list->next_ul[UE_id]) {

	// don't schedule if Msg4 is not received yet
	if (UE_list->UE_template[UE_PCCID(module_idP, UE_id)][UE_id].
	    configured == FALSE) {
	    LOG_D(MAC,
		  "[eNB %d] frame %d subfarme %d, UE %d: not configured, skipping UE scheduling \n",
		  module_idP, frameP, subframeP, UE_id);
	    continue;
	}

	rnti = UE_RNTI(module_idP, UE_id);

	if (rnti == NOT_A_RNTI) {
	    LOG_W(MAC, "[eNB %d] frame %d subfarme %d, UE %d: no RNTI \n",
		  module_idP, frameP, subframeP, UE_id);
	    continue;
	}

	drop_ue = 0;
	/* let's drop the UE if get_eNB_UE_stats returns NULL when calling it with any of the UE's active UL CCs */
	/* TODO: refine?

	   for (n=0; n<UE_list->numactiveULCCs[UE_id]; n++) {
	   CC_id = UE_list->ordered_ULCCids[n][UE_id];

	   if (mac_xface->get_eNB_UE_stats(module_idP,CC_id,rnti) == NULL) {
	   LOG_W(MAC,"[eNB %d] frame %d subframe %d, UE %d/%x CC %d: no PHY context\n", module_idP,frameP,subframeP,UE_id,rnti,CC_id);
	   drop_ue = 1;
	   break;
	   }
	   } */
	if (drop_ue == 1) {
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/* we can't come here, ulsch_scheduler_pre_processor won't put in the list a UE with no PHY context */
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	    abort();
	    /* TODO: this is a hack. Sometimes the UE has no PHY context but
	     * is still present in the MAC with 'ul_failure_timer' = 0 and
	     * 'ul_out_of_sync' = 0. It seems wrong and the UE stays there forever. Let's
	     * start an UL out of sync procedure in this case.
	     * The root cause of this problem has to be found and corrected.
	     * In the meantime, this hack...
	     */
	    if (UE_list->UE_sched_ctrl[UE_id].ul_failure_timer == 0 &&
		UE_list->UE_sched_ctrl[UE_id].ul_out_of_sync == 0) {
		LOG_W(MAC,
		      "[eNB %d] frame %d subframe %d, UE %d/%x CC %d: UE in weird state, let's put it 'out of sync'\n",
		      module_idP, frameP, subframeP, UE_id, rnti, CC_id);
		// inform RRC of failure and clear timer
		mac_eNB_rrc_ul_failure(module_idP, CC_id, frameP,
				       subframeP, rnti);
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                if (UE_list->UE_sched_ctrl[UE_id].ul_failure_timer > 0) {
                  LOG_I(MAC, "UE %d rnti %x: UL Failure timer %d clear to 0\n", UE_id, rnti,
                  UE_list->UE_sched_ctrl[UE_id].ul_failure_timer);
                }
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		UE_list->UE_sched_ctrl[UE_id].ul_failure_timer = 0;
		UE_list->UE_sched_ctrl[UE_id].ul_out_of_sync = 1;
	    }
	    continue;
	}
	// loop over all active UL CC_ids for this UE
	for (n = 0; n < UE_list->numactiveULCCs[UE_id]; n++) {
	    // This is the actual CC_id in the list
	    CC_id = UE_list->ordered_ULCCids[n][UE_id];
	    N_RB_UL = to_prb(cc[CC_id].ul_Bandwidth);

	    /*
	       aggregation=get_aggregation(get_bw_index(module_idP,CC_id),
	       eNB_UE_stats->dl_cqi,
	       format0);
	     */

	    if (CCE_allocation_infeasible
		(module_idP, CC_id, 1, subframeP, aggregation, rnti)) {
		LOG_W(MAC,
		      "[eNB %d] frame %d subframe %d, UE %d/%x CC %d: not enough nCCE\n",
		      module_idP, frameP, subframeP, UE_id, rnti, CC_id);
		continue;	// break;
	    }

	    /* be sure that there are some free RBs */
	    if (first_rb[CC_id] >= N_RB_UL - 1) {
		LOG_W(MAC,
		      "[eNB %d] frame %d subframe %d, UE %d/%x CC %d: dropping, not enough RBs\n",
		      module_idP, frameP, subframeP, UE_id, rnti, CC_id);
		continue;
	    }
	    //      if (eNB_UE_stats->mode == PUSCH) { // ue has a ulsch channel

	    UE_template = &UE_list->UE_template[CC_id][UE_id];
	    UE_sched_ctrl = &UE_list->UE_sched_ctrl[UE_id];
	    harq_pid =
		subframe2harqpid(&cc[CC_id], sched_frame, sched_subframeP);
	    round = UE_sched_ctrl->round_UL[CC_id][harq_pid];
	    AssertFatal(round < 8, "round %d > 7 for UE %d/%x\n", round,
			UE_id, rnti);
	    LOG_D(MAC,
		  "[eNB %d] frame %d subframe %d,Checking PUSCH %d for UE %d/%x CC %d : aggregation level %d, N_RB_UL %d\n",
		  module_idP, frameP, subframeP, harq_pid, UE_id, rnti,
		  CC_id, aggregation, N_RB_UL);

	    RC.eNB[module_idP][CC_id]->pusch_stats_BO[UE_id][(frameP *
							      10) +
							     subframeP] =
		UE_template->ul_total_buffer;
	    VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME
		(VCD_SIGNAL_DUMPER_VARIABLES_UE0_BO,
		 RC.eNB[module_idP][CC_id]->pusch_stats_BO[UE_id][(frameP *
								   10) +
								  subframeP]);
	    if (UE_is_to_be_scheduled(module_idP, CC_id, UE_id) > 0 || round > 0)	// || ((frameP%10)==0))
		// if there is information on bsr of DCCH, DTCH or if there is UL_SR, or if there is a packet to retransmit, or we want to schedule a periodic feedback every 10 frames
	    {
		LOG_D(MAC,
		      "[eNB %d][PUSCH %d] Frame %d subframe %d Scheduling UE %d/%x in round %d(SR %d,UL_inactivity timer %d,UL_failure timer %d,cqi_req_timer %d)\n",
		      module_idP, harq_pid, frameP, subframeP, UE_id, rnti,
		      round, UE_template->ul_SR,
		      UE_sched_ctrl->ul_inactivity_timer,
		      UE_sched_ctrl->ul_failure_timer,
		      UE_sched_ctrl->cqi_req_timer);
		// reset the scheduling request
		UE_template->ul_SR = 0;
		status = mac_eNB_get_rrc_status(module_idP, rnti);
		if (status < RRC_CONNECTED)
		    cqi_req = 0;
		else if (UE_sched_ctrl->cqi_req_timer > 30) {
		    cqi_req = 1;
		    UE_sched_ctrl->cqi_req_timer = 0;
		} else
		    cqi_req = 0;

		//power control
		//compute the expected ULSCH RX power (for the stats)

		// this is the normalized RX power and this should be constant (regardless of mcs
		normalized_rx_power = UE_sched_ctrl->pusch_snr[CC_id];
		target_rx_power = 178;

		// this assumes accumulated tpc
		// make sure that we are only sending a tpc update once a frame, otherwise the control loop will freak out
		int32_t framex10psubframe =
		    UE_template->pusch_tpc_tx_frame * 10 +
		    UE_template->pusch_tpc_tx_subframe;
		if (((framex10psubframe + 10) <= (frameP * 10 + subframeP)) ||	//normal case
		    ((framex10psubframe > (frameP * 10 + subframeP)) && (((10240 - framex10psubframe + frameP * 10 + subframeP) >= 10))))	//frame wrap-around
		{
		    UE_template->pusch_tpc_tx_frame = frameP;
		    UE_template->pusch_tpc_tx_subframe = subframeP;
		    if (normalized_rx_power > (target_rx_power + 4)) {
			tpc = 0;	//-1
			tpc_accumulated--;
		    } else if (normalized_rx_power < (target_rx_power - 4)) {
			tpc = 2;	//+1
			tpc_accumulated++;
		    } else {
			tpc = 1;	//0
		    }
		} else {
		    tpc = 1;	//0
		}
		//tpc = 1;
		if (tpc != 1) {
		    LOG_D(MAC,
			  "[eNB %d] ULSCH scheduler: frame %d, subframe %d, harq_pid %d, tpc %d, accumulated %d, normalized/target rx power %d/%d\n",
			  module_idP, frameP, subframeP, harq_pid, tpc,
			  tpc_accumulated, normalized_rx_power,
			  target_rx_power);
		}
		// new transmission
		if (round == 0) {

		    ndi = 1 - UE_template->oldNDI_UL[harq_pid];
		    UE_template->oldNDI_UL[harq_pid] = ndi;
		    UE_list->eNB_UE_stats[CC_id][UE_id].
			normalized_rx_power = normalized_rx_power;
		    UE_list->eNB_UE_stats[CC_id][UE_id].target_rx_power =
			target_rx_power;
		    UE_list->eNB_UE_stats[CC_id][UE_id].ulsch_mcs1 =
			UE_template->pre_assigned_mcs_ul;
		    UE_template->mcs_UL[harq_pid] = UE_template->pre_assigned_mcs_ul;	//cmin (UE_template->pre_assigned_mcs_ul, openair_daq_vars.target_ue_ul_mcs); // adjust, based on user-defined MCS
		    if (UE_template->pre_allocated_rb_table_index_ul >= 0) {
			rb_table_index =
			    UE_template->pre_allocated_rb_table_index_ul;
		    } else {
			UE_template->mcs_UL[harq_pid] = 10;	//cmin (10, openair_daq_vars.target_ue_ul_mcs);
			rb_table_index = 5;	// for PHR
		    }

		    UE_list->eNB_UE_stats[CC_id][UE_id].ulsch_mcs2 =
			UE_template->mcs_UL[harq_pid];
		    //            buffer_occupancy = UE_template->ul_total_buffer;


		    while (((rb_table[rb_table_index] >
			     (N_RB_UL - 1 - first_rb[CC_id]))
			    || (rb_table[rb_table_index] > 45))
			   && (rb_table_index > 0)) {
			rb_table_index--;
		    }

		    UE_template->TBS_UL[harq_pid] =
			get_TBS_UL(UE_template->mcs_UL[harq_pid],
				   rb_table[rb_table_index]);
		    UE_list->eNB_UE_stats[CC_id][UE_id].
			total_rbs_used_rx += rb_table[rb_table_index];
		    UE_list->eNB_UE_stats[CC_id][UE_id].ulsch_TBS =
			UE_template->TBS_UL[harq_pid];
		    //            buffer_occupancy -= TBS;

		    T(T_ENB_MAC_UE_UL_SCHEDULE, T_INT(module_idP),
		      T_INT(CC_id), T_INT(rnti), T_INT(frameP),
		      T_INT(subframeP), T_INT(harq_pid),
		      T_INT(UE_template->mcs_UL[harq_pid]),
		      T_INT(first_rb[CC_id]),
		      T_INT(rb_table[rb_table_index]),
		      T_INT(UE_template->TBS_UL[harq_pid]), T_INT(ndi));

		    if (mac_eNB_get_rrc_status(module_idP, rnti) <
			RRC_CONNECTED)
			LOG_D(MAC,
			      "[eNB %d][PUSCH %d/%x] CC_id %d Frame %d subframeP %d Scheduled UE %d (mcs %d, first rb %d, nb_rb %d, rb_table_index %d, TBS %d, harq_pid %d)\n",
			      module_idP, harq_pid, rnti, CC_id, frameP,
			      subframeP, UE_id,
			      UE_template->mcs_UL[harq_pid],
			      first_rb[CC_id], rb_table[rb_table_index],
			      rb_table_index,
			      UE_template->TBS_UL[harq_pid], harq_pid);

		    // bad indices : 20 (40 PRB), 21 (45 PRB), 22 (48 PRB)
		    //store for possible retransmission
		    UE_template->nb_rb_ul[harq_pid] =
			rb_table[rb_table_index];
		    UE_template->first_rb_ul[harq_pid] = first_rb[CC_id];

		    UE_sched_ctrl->ul_scheduled |= (1 << harq_pid);
		    if (UE_id == UE_list->head)
			VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME
			    (VCD_SIGNAL_DUMPER_VARIABLES_UE0_SCHEDULED,
			     UE_sched_ctrl->ul_scheduled);

		    // adjust total UL buffer status by TBS, wait for UL sdus to do final update
		    LOG_D(MAC,
			  "[eNB %d] CC_id %d UE %d/%x : adjusting ul_total_buffer, old %d, TBS %d\n",
			  module_idP, CC_id, UE_id, rnti,
			  UE_template->ul_total_buffer,
			  UE_template->TBS_UL[harq_pid]);
		    if (UE_template->ul_total_buffer >
			UE_template->TBS_UL[harq_pid])
			UE_template->ul_total_buffer -=
			    UE_template->TBS_UL[harq_pid];
		    else
			UE_template->ul_total_buffer = 0;
		    LOG_D(MAC, "ul_total_buffer, new %d\n",
			  UE_template->ul_total_buffer);
		    // Cyclic shift for DM RS
		    cshift = 0;	// values from 0 to 7 can be used for mapping the cyclic shift (36.211 , Table 5.5.2.1.1-1)
		    // save it for a potential retransmission
		    UE_template->cshift[harq_pid] = cshift;

		    hi_dci0_pdu =
			&hi_dci0_req->hi_dci0_pdu_list[mac->HI_DCI0_req
						       [CC_id].
						       hi_dci0_request_body.
						       number_of_dci +
						       mac->HI_DCI0_req
						       [CC_id].
						       hi_dci0_request_body.
						       number_of_hi];
		    memset((void *) hi_dci0_pdu, 0,
			   sizeof(nfapi_hi_dci0_request_pdu_t));
		    hi_dci0_pdu->pdu_type = NFAPI_HI_DCI0_DCI_PDU_TYPE;
		    hi_dci0_pdu->pdu_size =
			2 + sizeof(nfapi_hi_dci0_dci_pdu);
		    hi_dci0_pdu->dci_pdu.dci_pdu_rel8.dci_format =
			NFAPI_UL_DCI_FORMAT_0;
		    hi_dci0_pdu->dci_pdu.dci_pdu_rel8.aggregation_level =
			aggregation;
		    hi_dci0_pdu->dci_pdu.dci_pdu_rel8.rnti = rnti;
		    hi_dci0_pdu->dci_pdu.dci_pdu_rel8.transmission_power =
			6000;
		    hi_dci0_pdu->dci_pdu.dci_pdu_rel8.
			resource_block_start = first_rb[CC_id];
		    hi_dci0_pdu->dci_pdu.dci_pdu_rel8.
			number_of_resource_block =
			rb_table[rb_table_index];
		    hi_dci0_pdu->dci_pdu.dci_pdu_rel8.mcs_1 =
			UE_template->mcs_UL[harq_pid];
		    hi_dci0_pdu->dci_pdu.dci_pdu_rel8.
			cyclic_shift_2_for_drms = cshift;
		    hi_dci0_pdu->dci_pdu.dci_pdu_rel8.
			frequency_hopping_enabled_flag = 0;
		    hi_dci0_pdu->dci_pdu.dci_pdu_rel8.
			new_data_indication_1 = ndi;
		    hi_dci0_pdu->dci_pdu.dci_pdu_rel8.tpc = tpc;
		    hi_dci0_pdu->dci_pdu.dci_pdu_rel8.cqi_csi_request =
			cqi_req;
		    hi_dci0_pdu->dci_pdu.dci_pdu_rel8.dl_assignment_index =
			UE_template->DAI_ul[sched_subframeP];

		    mac->HI_DCI0_req[CC_id].hi_dci0_request_body.
			number_of_dci++;

		    LOG_D(MAC,
			  "[PUSCH %d] Frame %d, Subframe %d: Adding UL CONFIG.Request for UE %d/%x, ulsch_frame %d, ulsch_subframe %d\n",
			  harq_pid, frameP, subframeP, UE_id, rnti,
			  sched_frame, sched_subframeP);

		    // Add UL_config PDUs
		    fill_nfapi_ulsch_config_request_rel8(&ul_req_tmp->ul_config_pdu_list[ul_req_tmp->number_of_pdus], cqi_req, cc, UE_template->physicalConfigDedicated, get_tmode(module_idP, CC_id, UE_id), mac->ul_handle, rnti, first_rb[CC_id],	// resource_block_start
							 rb_table[rb_table_index],	// number_of_resource_blocks
							 UE_template->mcs_UL[harq_pid], cshift,	// cyclic_shift_2_for_drms
							 0,	// frequency_hopping_enabled_flag
							 0,	// frequency_hopping_bits
							 ndi,	// new_data_indication
							 0,	// redundancy_version
							 harq_pid,	// harq_process_number
							 0,	// ul_tx_mode
							 0,	// current_tx_nb
							 0,	// n_srs
							 get_TBS_UL
							 (UE_template->
							  mcs_UL[harq_pid],
							  rb_table
							  [rb_table_index]));
1425
#ifdef Rel14
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		    if (UE_template->rach_resource_type > 0) {	// This is a BL/CE UE allocation
			fill_nfapi_ulsch_config_request_emtc(&ul_req_tmp->ul_config_pdu_list[ul_req_tmp->number_of_pdus], UE_template->rach_resource_type > 2 ? 2 : 1, 1,	//total_number_of_repetitions
							     1,	//repetition_number
							     (frameP *
							      10) +
							     subframeP);
		    }
1433
#endif
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		    ul_req_tmp->number_of_pdus++;
		    mac->ul_handle++;

		    add_ue_ulsch_info(module_idP,
				      CC_id, UE_id, subframeP,
				      S_UL_SCHEDULED);

		    LOG_D(MAC,
			  "[eNB %d] CC_id %d Frame %d, subframeP %d: Generated ULSCH DCI for next UE_id %d, format 0\n",
			  module_idP, CC_id, frameP, subframeP, UE_id);

		    // increment first rb for next UE allocation
		    first_rb[CC_id] += rb_table[rb_table_index];
		} else {	// round > 0 => retransmission
		    T(T_ENB_MAC_UE_UL_SCHEDULE_RETRANSMISSION,
		      T_INT(module_idP), T_INT(CC_id), T_INT(rnti),
		      T_INT(frameP), T_INT(subframeP), T_INT(harq_pid),
		      T_INT(UE_template->mcs_UL[harq_pid]),
		      T_INT(first_rb[CC_id]),
		      T_INT(rb_table[rb_table_index]), T_INT(round));

		    // fill in NAK information

		    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 =
			UE_template->first_rb_ul[harq_pid];
		    hi_dci0_pdu->hi_pdu.hi_pdu_rel8.
			cyclic_shift_2_for_drms =
			UE_template->cshift[harq_pid];
		    hi_dci0_pdu->hi_pdu.hi_pdu_rel8.hi_value = 0;
		    hi_dci0_req->number_of_hi++;
		    LOG_D(MAC,
			  "[eNB %d][PUSCH %d/%x] CC_id %d Frame %d subframeP %d Scheduled (PHICH) UE %d (mcs %d, first rb %d, nb_rb %d, TBS %d, round %d)\n",
			  module_idP, harq_pid, rnti, CC_id, frameP,
			  subframeP, UE_id, UE_template->mcs_UL[harq_pid],
			  UE_template->first_rb_ul[harq_pid],
			  UE_template->nb_rb_ul[harq_pid],
			  UE_template->TBS_UL[harq_pid], round);
		    // Add UL_config PDUs
		    LOG_D(MAC,
			  "[PUSCH %d] Frame %d, Subframe %d: Adding UL CONFIG.Request for UE %d/%x, ulsch_frame %d, ulsch_subframe %d\n",
			  harq_pid, frameP, subframeP, UE_id, rnti,
			  sched_frame, sched_subframeP);
		    fill_nfapi_ulsch_config_request_rel8(&ul_req_tmp->ul_config_pdu_list[ul_req_tmp->number_of_pdus], cqi_req, cc, UE_template->physicalConfigDedicated, get_tmode(module_idP, CC_id, UE_id), mac->ul_handle, rnti, UE_template->first_rb_ul[harq_pid],	// resource_block_start
							 UE_template->nb_rb_ul[harq_pid],	// number_of_resource_blocks
							 UE_template->mcs_UL[harq_pid], cshift,	// cyclic_shift_2_for_drms
							 0,	// frequency_hopping_enabled_flag
							 0,	// frequency_hopping_bits
							 UE_template->oldNDI_UL[harq_pid],	// new_data_indication
							 rvidx_tab[round & 3],	// redundancy_version
							 harq_pid,	// harq_process_number
							 0,	// ul_tx_mode
							 0,	// current_tx_nb
							 0,	// n_srs
							 UE_template->
							 TBS_UL[harq_pid]);
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#ifdef Rel14
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		    if (UE_template->rach_resource_type > 0) {	// This is a BL/CE UE allocation
			fill_nfapi_ulsch_config_request_emtc(&ul_req_tmp->ul_config_pdu_list[ul_req_tmp->number_of_pdus], UE_template->rach_resource_type > 2 ? 2 : 1, 1,	//total_number_of_repetitions
							     1,	//repetition_number
							     (frameP *
							      10) +
							     subframeP);
		    }
1507
#endif
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		    ul_req_tmp->number_of_pdus++;
		    mac->ul_handle++;

		}		/*
				   else if (round > 0) { //we schedule a retransmission

				   ndi = UE_template->oldNDI_UL[harq_pid];

				   if ((round&3)==0) {
				   mcs = openair_daq_vars.target_ue_ul_mcs;
				   } else {
				   mcs = rvidx_tab[round&3] + 28; //not correct for round==4!

				   }

				   LOG_I(MAC,"[eNB %d][PUSCH %d/%x] CC_id %d Frame %d subframeP %d Scheduled UE retransmission (mcs %d, first rb %d, nb_rb %d, harq_pid %d, round %d)\n",
				   module_idP,UE_id,rnti,CC_id,frameP,subframeP,mcs,
				   first_rb[CC_id],UE_template->nb_rb_ul[harq_pid],
				   harq_pid, round);

				   rballoc = mac_xface->computeRIV(frame_parms->N_RB_UL,
				   first_rb[CC_id],
				   UE_template->nb_rb_ul[harq_pid]);
				   first_rb[CC_id]+=UE_template->nb_rb_ul[harq_pid];  // increment for next UE allocation

				   UE_list->eNB_UE_stats[CC_id][UE_id].num_retransmission_rx+=1;
				   UE_list->eNB_UE_stats[CC_id][UE_id].rbs_used_retx_rx=UE_template->nb_rb_ul[harq_pid];
				   UE_list->eNB_UE_stats[CC_id][UE_id].total_rbs_used_rx+=UE_template->nb_rb_ul[harq_pid];
				   UE_list->eNB_UE_stats[CC_id][UE_id].ulsch_mcs1=mcs;
				   UE_list->eNB_UE_stats[CC_id][UE_id].ulsch_mcs2=mcs;
				   }
				 */

	    }			// UE_is_to_be_scheduled
	}			// loop over UE_id
    }				// loop of CC_id
1544
}