eNB_scheduler_RA.c 61.4 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_RA.c
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 * \brief primitives used for random access
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 * \author  Navid Nikaein and Raymond Knopp
 * \date 2010 - 2014
 * \email: navid.nikaein@eurecom.fr
 * \version 1.0
 * @ingroup _mac

 */

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


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#include "assertions.h"
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#include "platform_types.h"
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#include "PHY/defs.h"
#include "PHY/extern.h"
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#include "msc.h"
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#include "SCHED/defs.h"
#include "SCHED/extern.h"

#include "LAYER2/MAC/defs.h"
#include "LAYER2/MAC/extern.h"

#include "LAYER2/MAC/proto.h"
#include "UTIL/LOG/log.h"
#include "UTIL/LOG/vcd_signal_dumper.h"
#include "UTIL/OPT/opt.h"
#include "OCG.h"
#include "OCG_extern.h"

#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 "SIMULATION/TOOLS/defs.h"	// for taus
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#include "T.h"
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void
add_msg3(module_id_t module_idP, int CC_id, RA_t * ra, frame_t frameP,
	 sub_frame_t subframeP)
{
    eNB_MAC_INST *mac = RC.mac[module_idP];
    COMMON_channels_t *cc = &mac->common_channels[CC_id];
    uint8_t j;
    nfapi_ul_config_request_t *ul_req;
    nfapi_ul_config_request_pdu_t *ul_config_pdu;
    nfapi_ul_config_request_body_t *ul_req_body;
    nfapi_hi_dci0_request_body_t *hi_dci0_req;
    nfapi_hi_dci0_request_pdu_t *hi_dci0_pdu;
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    uint8_t rvseq[4] = { 0, 2, 3, 1 };
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    hi_dci0_req = &mac->HI_DCI0_req[CC_id].hi_dci0_request_body;
    ul_req = &mac->UL_req_tmp[CC_id][ra->Msg3_subframe];
    ul_req_body = &ul_req->ul_config_request_body;
    AssertFatal(ra->state != IDLE, "RA is not active for RA %X\n",
		ra->rnti);
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#ifdef Rel14
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    if (ra->rach_resource_type > 0) {
	LOG_D(MAC,
	      "[eNB %d][RAPROC] Frame %d, Subframe %d : CC_id %d CE level %d is active, Msg3 in (%d,%d)\n",
	      module_idP, frameP, subframeP, CC_id,
	      ra->rach_resource_type - 1, ra->Msg3_frame,
	      ra->Msg3_subframe);
	LOG_D(MAC,
	      "Frame %d, Subframe %d Adding Msg3 UL Config Request for (%d,%d) : (%d,%d)\n",
	      frameP, subframeP, ra->Msg3_frame, ra->Msg3_subframe,
	      ra->msg3_nb_rb, ra->msg3_round);

	ul_config_pdu =
	    &ul_req_body->ul_config_pdu_list[ul_req_body->number_of_pdus];

	memset((void *) ul_config_pdu, 0,
	       sizeof(nfapi_ul_config_request_pdu_t));
	ul_config_pdu->pdu_type = NFAPI_UL_CONFIG_ULSCH_PDU_TYPE;
	ul_config_pdu->pdu_size =
	    (uint8_t) (2 + sizeof(nfapi_ul_config_ulsch_pdu));
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.handle = mac->ul_handle++;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.rnti = ra->rnti;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.resource_block_start =
	    narrowband_to_first_rb(cc,
				   ra->msg34_narrowband) +
	    ra->msg3_first_rb;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.number_of_resource_blocks =
	    ra->msg3_nb_rb;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.modulation_type = 2;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.cyclic_shift_2_for_drms =
	    0;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.
	    frequency_hopping_enabled_flag = 0;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.frequency_hopping_bits = 0;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.new_data_indication = 0;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.redundancy_version =
	    rvseq[ra->msg3_round];
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.harq_process_number =
	    ((10 * ra->Msg3_frame) + ra->Msg3_subframe) & 7;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.ul_tx_mode = 0;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.current_tx_nb = 0;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.n_srs = 1;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.size =
	    get_TBS_UL(ra->msg3_mcs, ra->msg3_nb_rb);
	// Re13 fields
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel13.ue_type =
	    ra->rach_resource_type > 2 ? 2 : 1;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel13.
	    total_number_of_repetitions = 1;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel13.repetition_number = 1;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel13.
	    initial_transmission_sf_io =
	    (ra->Msg3_frame * 10) + ra->Msg3_subframe;
	ul_req_body->number_of_pdus++;
    }				//  if (ra->rach_resource_type>0) {  
    else
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#endif
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    {
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	LOG_D(MAC,
	      "[eNB %d][RAPROC] Frame %d, Subframe %d : CC_id %d RA is active, Msg3 in (%d,%d)\n",
	      module_idP, frameP, subframeP, CC_id, ra->Msg3_frame,
	      ra->Msg3_subframe);

	LOG_D(MAC,
	      "Frame %d, Subframe %d Adding Msg3 UL Config Request for (%d,%d) : (%d,%d,%d)\n",
	      frameP, subframeP, ra->Msg3_frame, ra->Msg3_subframe,
	      ra->msg3_nb_rb, ra->msg3_first_rb, ra->msg3_round);

	ul_config_pdu =
	    &ul_req_body->ul_config_pdu_list[ul_req_body->number_of_pdus];

	memset((void *) ul_config_pdu, 0,
	       sizeof(nfapi_ul_config_request_pdu_t));
	ul_config_pdu->pdu_type = NFAPI_UL_CONFIG_ULSCH_PDU_TYPE;
	ul_config_pdu->pdu_size =
	    (uint8_t) (2 + sizeof(nfapi_ul_config_ulsch_pdu));
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.handle = mac->ul_handle++;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.rnti = ra->rnti;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.resource_block_start =
	    ra->msg3_first_rb;
	AssertFatal(ra->msg3_nb_rb > 0, "nb_rb = 0\n");
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.number_of_resource_blocks =
	    ra->msg3_nb_rb;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.modulation_type = 2;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.cyclic_shift_2_for_drms =
	    0;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.
	    frequency_hopping_enabled_flag = 0;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.frequency_hopping_bits = 0;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.new_data_indication = 0;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.redundancy_version =
	    rvseq[ra->msg3_round];
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.harq_process_number =
	    subframe2harqpid(cc, ra->Msg3_frame, ra->Msg3_subframe);
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.ul_tx_mode = 0;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.current_tx_nb = 0;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.n_srs = 1;
	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.size =
	    get_TBS_UL(10, ra->msg3_nb_rb);
	ul_req_body->number_of_pdus++;
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	// save UL scheduling information for preprocessor
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	for (j = 0; j < ra->msg3_nb_rb; j++)
	    cc->vrb_map_UL[ra->msg3_first_rb + j] = 1;


	if (ra->msg3_round != 0) {	// program HI too
	    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 =
		ra->msg3_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 = 0;
	    hi_dci0_req->number_of_hi++;
	    // save UL scheduling information for preprocessor
	    for (j = 0; j < ra->msg3_nb_rb; j++)
		cc->vrb_map_UL[ra->msg3_first_rb + j] = 1;

	    LOG_D(MAC,
		  "[eNB %d][PUSCH-RA %x] CC_id %d Frame %d subframeP %d Scheduled (PHICH) RA (mcs %d, first rb %d, nb_rb %d,round %d)\n",
		  module_idP, ra->rnti, CC_id, frameP, subframeP, 10, 1, 1,
		  ra->msg3_round - 1);
	}			//       if (ra->msg3_round != 0) { // program HI too
    }				// non-BL/CE UE case
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}

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void
generate_Msg2(module_id_t module_idP, int CC_idP, frame_t frameP,
	      sub_frame_t subframeP, RA_t * ra)
{

    eNB_MAC_INST *mac = RC.mac[module_idP];
    COMMON_channels_t *cc = mac->common_channels;
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    uint8_t *vrb_map;
    int first_rb;
    int N_RB_DL;
    nfapi_dl_config_request_pdu_t *dl_config_pdu;
    nfapi_tx_request_pdu_t *TX_req;
    nfapi_dl_config_request_body_t *dl_req;
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    vrb_map = cc[CC_idP].vrb_map;
    dl_req = &mac->DL_req[CC_idP].dl_config_request_body;
    dl_config_pdu = &dl_req->dl_config_pdu_list[dl_req->number_pdu];
    N_RB_DL = to_prb(cc[CC_idP].mib->message.dl_Bandwidth);
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#ifdef Rel14
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    int rmax = 0;
    int rep = 0;
    int reps = 0;
    int num_nb = 0;

    first_rb = 0;
    struct PRACH_ConfigSIB_v1310 *ext4_prach;
    PRACH_ParametersListCE_r13_t *prach_ParametersListCE_r13;
    PRACH_ParametersCE_r13_t *p[4] = { NULL, NULL, NULL, NULL };

    uint16_t absSF = (10 * frameP) + subframeP;
    uint16_t absSF_Msg2 = (10 * ra->Msg2_frame) + ra->Msg2_subframe;

    if (absSF > absSF_Msg2)
	return;			// we're not ready yet, need to be to start ==  

    if (cc[CC_idP].radioResourceConfigCommon_BR) {

	ext4_prach =
	    cc[CC_idP].radioResourceConfigCommon_BR->ext4->
	    prach_ConfigCommon_v1310;
	prach_ParametersListCE_r13 =
	    &ext4_prach->prach_ParametersListCE_r13;

	switch (prach_ParametersListCE_r13->list.count) {
	case 4:
	    p[3] = prach_ParametersListCE_r13->list.array[3];
	case 3:
	    p[2] = prach_ParametersListCE_r13->list.array[2];
	case 2:
	    p[1] = prach_ParametersListCE_r13->list.array[1];
	case 1:
	    p[0] = prach_ParametersListCE_r13->list.array[0];
	    break;
	default:
	    AssertFatal(1 == 0,
			"Illegal count for prach_ParametersListCE_r13 %d\n",
			(int) prach_ParametersListCE_r13->list.count);
	    break;
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	}
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    }

    if (ra->rach_resource_type > 0) {

	// This uses an MPDCCH Type 2 common allocation according to Section 9.1.5 36-213
	// Parameters:
	//    p=2+4 PRB set (number of PRB pairs 3)
	//    rmax = mpdcch-NumRepetition-RA-r13 => Table 9.1.5-3
	//    if CELevel = 0,1 => Table 9.1.5-1b for MPDCCH candidates
	//    if CELevel = 2,3 => Table 9.1.5-2b for MPDCCH candidates
	//    distributed transmission

	// rmax from SIB2 information
	AssertFatal(rmax < 9, "rmax>8!\n");
	rmax =
	    1 << p[ra->rach_resource_type -
		   1]->mpdcch_NumRepetition_RA_r13;
	// choose r1 by default for RAR (Table 9.1.5-5)
	rep = 0;
	// get actual repetition count from Table 9.1.5-3
	reps = (rmax <= 8) ? (1 << rep) : (rmax >> (3 - rep));
	// get narrowband according to higher-layer config 
	num_nb =
	    p[ra->rach_resource_type -
	      1]->mpdcch_NarrowbandsToMonitor_r13.list.count;
	ra->msg2_narrowband =
	    *p[ra->rach_resource_type -
	       1]->mpdcch_NarrowbandsToMonitor_r13.list.array[ra->
							      preamble_index
							      % num_nb];
	first_rb =
	    narrowband_to_first_rb(&cc[CC_idP], ra->msg2_narrowband);

	if ((ra->msg2_mpdcch_repetition_cnt == 0) &&
	    (mpdcch_sf_condition
	     (mac, CC_idP, frameP, subframeP, rmax, TYPE2, -1) > 0)) {
	    // MPDCCH configuration for RAR
	    LOG_D(MAC,
		  "[eNB %d][RAPROC] Frame %d, Subframe %d : In generate_Msg2, Programming MPDCCH %d repetitions\n",
		  module_idP, frameP, subframeP, reps);


	    memset((void *) dl_config_pdu, 0,
		   sizeof(nfapi_dl_config_request_pdu_t));
	    dl_config_pdu->pdu_type = NFAPI_DL_CONFIG_MPDCCH_PDU_TYPE;
	    dl_config_pdu->pdu_size =
		(uint8_t) (2 + sizeof(nfapi_dl_config_mpdcch_pdu));
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.dci_format =
		(ra->rach_resource_type > 1) ? 11 : 10;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.mpdcch_narrow_band =
		ra->msg2_narrowband;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.
		number_of_prb_pairs = 6;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.resource_block_assignment = 0;	// Note: this can be dynamic
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.mpdcch_tansmission_type = 1;	// imposed (9.1.5 in 213) for Type 2 Common search space  
	    AssertFatal(cc[CC_idP].
			sib1_v13ext->bandwidthReducedAccessRelatedInfo_r13
			!= NULL,
			"cc[CC_id].sib1_v13ext->bandwidthReducedAccessRelatedInfo_r13 is null\n");
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.start_symbol =
		cc[CC_idP].sib1_v13ext->
		bandwidthReducedAccessRelatedInfo_r13->startSymbolBR_r13;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.ecce_index = 0;	// Note: this should be dynamic
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.aggregation_level = 16;	// OK for CEModeA r1-3 (9.1.5-1b) or CEModeB r1-4
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.rnti_type = 2;	// RA-RNTI
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.rnti = ra->RA_rnti;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.ce_mode =
		(ra->rach_resource_type < 3) ? 1 : 2;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.
		drms_scrambling_init = cc[CC_idP].physCellId;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.
		initial_transmission_sf_io = (frameP * 10) + subframeP;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.transmission_power = 6000;	// 0dB
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.resource_block_coding = getRIV(6, 0, 6);	// Note: still to be checked if it should not be (getRIV(N_RB_DL,first_rb,6)) : Check nFAPI specifications and what is done L1 with this parameter
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.mcs = 4;	// adjust according to size of RAR, 208 bits with N1A_PRB=3
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.pdsch_reptition_levels = 4;	// fix to 4 for now
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.redundancy_version =
		0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.new_data_indicator =
		0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.harq_process = 0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.tpmi_length = 0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.tpmi = 0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.pmi_flag = 0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.pmi = 0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.
		harq_resource_offset = 0;
	    dl_config_pdu->mpdcch_pdu.
		mpdcch_pdu_rel13.dci_subframe_repetition_number = rep;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.tpc = 1;	// N1A_PRB=3 (36.212); => 208 bits for mcs=4, choose mcs according t message size TBD
	    dl_config_pdu->mpdcch_pdu.
		mpdcch_pdu_rel13.downlink_assignment_index_length = 0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.
		downlink_assignment_index = 0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.
		allocate_prach_flag = 0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.preamble_index = 0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.prach_mask_index =
		0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.starting_ce_level =
		0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.srs_request = 0;
	    dl_config_pdu->mpdcch_pdu.
		mpdcch_pdu_rel13.antenna_ports_and_scrambling_identity_flag
		= 0;
	    dl_config_pdu->mpdcch_pdu.
		mpdcch_pdu_rel13.antenna_ports_and_scrambling_identity = 0;
	    dl_config_pdu->mpdcch_pdu.
		mpdcch_pdu_rel13.frequency_hopping_enabled_flag = 0;
	    dl_config_pdu->mpdcch_pdu.
		mpdcch_pdu_rel13.paging_direct_indication_differentiation_flag
		= 0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.direct_indication =
		0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.total_dci_length_including_padding = 0;	// this is not needed by OAI L1, but should be filled in
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.
		number_of_tx_antenna_ports = 1;
	    ra->msg2_mpdcch_repetition_cnt++;
	    dl_req->number_pdu++;
	    ra->Msg2_subframe = (ra->Msg2_subframe + 9) % 10;

	}			//repetition_count==0 && SF condition met
	if (ra->msg2_mpdcch_repetition_cnt > 0) {	// we're in a stream of repetitions
	    LOG_D(MAC,
		  "[eNB %d][RAPROC] Frame %d, Subframe %d : In generate_Msg2, MPDCCH repetition %d\n",
		  module_idP, frameP, subframeP,
		  ra->msg2_mpdcch_repetition_cnt);

	    if (ra->msg2_mpdcch_repetition_cnt == reps) {	// this is the last mpdcch repetition
		if (cc[CC_idP].tdd_Config == NULL) {	// FDD case
		    // wait 2 subframes for PDSCH transmission
		    if (subframeP > 7)
			ra->Msg2_frame = (frameP + 1) & 1023;
		    else
			ra->Msg2_frame = frameP;
		    ra->Msg2_subframe = (subframeP + 2) % 10;	// +2 is the "n+x" from Section 7.1.11  in 36.213
		} else {
		    AssertFatal(1 == 0, "TDD case not done yet\n");
		}
	    }			// mpdcch_repetition_count == reps
	    ra->msg2_mpdcch_repetition_cnt++;

	    if ((ra->Msg2_frame == frameP)
		&& (ra->Msg2_subframe == subframeP)) {
		// Program PDSCH
		LOG_D(MAC,
		      "[eNB %d][RAPROC] Frame %d, Subframe %d : In generate_Msg2, Programming PDSCH\n",
		      module_idP, frameP, subframeP);
		ra->state = WAITMSG3;

		dl_config_pdu =
		    &dl_req->dl_config_pdu_list[dl_req->number_pdu];
		memset((void *) dl_config_pdu, 0,
		       sizeof(nfapi_dl_config_request_pdu_t));
		dl_config_pdu->pdu_type = NFAPI_DL_CONFIG_DLSCH_PDU_TYPE;
		dl_config_pdu->pdu_size =
		    (uint8_t) (2 + sizeof(nfapi_dl_config_dlsch_pdu));
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.pdu_index =
		    mac->pdu_index[CC_idP];
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.rnti = ra->RA_rnti;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.
		    resource_allocation_type = 2;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.virtual_resource_block_assignment_flag = 0;	// localized
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.
		    resource_block_coding = getRIV(N_RB_DL, first_rb, 6);
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.modulation = 2;	//QPSK
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.
		    redundancy_version = 0;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.transport_blocks = 1;	// first block
		dl_config_pdu->dlsch_pdu.
		    dlsch_pdu_rel8.transport_block_to_codeword_swap_flag =
		    0;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.
		    transmission_scheme = (cc->p_eNB == 1) ? 0 : 1;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.number_of_layers =
		    1;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.
		    number_of_subbands = 1;
		//      dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.codebook_index                         = ;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.
		    ue_category_capacity = 1;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.pa = 4;	// 0 dB
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.
		    delta_power_offset_index = 0;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.ngap = 0;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.nprb = get_subbandsize(cc->mib->message.dl_Bandwidth);	// ignored
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.transmission_mode =
		    (cc->p_eNB == 1) ? 1 : 2;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.
		    num_bf_prb_per_subband = 1;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.num_bf_vector = 1;
		//      dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.bf_vector                    = ; 

		// Rel10 fields
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel10.pdsch_start =
		    cc[CC_idP].
		    sib1_v13ext->bandwidthReducedAccessRelatedInfo_r13->
		    startSymbolBR_r13;
		// Rel13 fields
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel13.ue_type =
		    (ra->rach_resource_type < 3) ? 1 : 2;;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel13.pdsch_payload_type = 2;	// not SI message
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel13.
		    initial_transmission_sf_io = (10 * frameP) + subframeP;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel13.drms_table_flag =
		    0;
		dl_req->number_pdu++;

		// Program UL processing for Msg3, same as regular LTE
		get_Msg3alloc(&cc[CC_idP], subframeP, frameP,
			      &ra->Msg3_frame, &ra->Msg3_subframe);
		add_msg3(module_idP, CC_idP, ra, frameP, subframeP);
		fill_rar_br(mac, CC_idP, ra, frameP, subframeP,
			    cc[CC_idP].RAR_pdu.payload,
			    ra->rach_resource_type - 1);
		// DL request
		mac->TX_req[CC_idP].sfn_sf = (frameP << 4) + subframeP;
		TX_req =
		    &mac->TX_req[CC_idP].tx_request_body.tx_pdu_list[mac->
								     TX_req
								     [CC_idP].
								     tx_request_body.number_of_pdus];
		TX_req->pdu_length = 7;	// This should be changed if we have more than 1 preamble 
		TX_req->pdu_index = mac->pdu_index[CC_idP]++;
		TX_req->num_segments = 1;
		TX_req->segments[0].segment_length = 7;
		TX_req->segments[0].segment_data =
		    cc[CC_idP].RAR_pdu.payload;
		mac->TX_req[CC_idP].tx_request_body.number_of_pdus++;
	    }
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	}
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    } else
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#endif
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    {
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	if ((ra->Msg2_frame == frameP) && (ra->Msg2_subframe == subframeP)) {
	    LOG_D(MAC,
		  "[eNB %d] CC_id %d Frame %d, subframeP %d: Generating RAR DCI, state %d\n",
		  module_idP, CC_idP, frameP, subframeP, ra->state);

	    // Allocate 4 PRBS starting in RB 0
	    first_rb = 0;
	    vrb_map[first_rb] = 1;
	    vrb_map[first_rb + 1] = 1;
	    vrb_map[first_rb + 2] = 1;
	    vrb_map[first_rb + 3] = 1;

	    memset((void *) dl_config_pdu, 0,
		   sizeof(nfapi_dl_config_request_pdu_t));
	    dl_config_pdu->pdu_type = NFAPI_DL_CONFIG_DCI_DL_PDU_TYPE;
	    dl_config_pdu->pdu_size =
		(uint8_t) (2 + sizeof(nfapi_dl_config_dci_dl_pdu));
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.dci_format =
		NFAPI_DL_DCI_FORMAT_1A;
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.aggregation_level =
		4;
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.rnti = ra->RA_rnti;
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.rnti_type = 2;	// RA-RNTI : see Table 4-10 from SCF082 - nFAPI specifications
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.transmission_power = 6000;	// equal to RS power

	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.harq_process = 0;
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.tpc = 1;	// no TPC
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.
		new_data_indicator_1 = 1;
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.mcs_1 = 0;
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.
		redundancy_version_1 = 0;
	    dl_config_pdu->dci_dl_pdu.
		dci_dl_pdu_rel8.virtual_resource_block_assignment_flag = 0;

	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.
		resource_block_coding = getRIV(N_RB_DL, first_rb, 4);

	    // This checks if the above DCI allocation is feasible in current subframe
	    if (!CCE_allocation_infeasible
		(module_idP, CC_idP, 0, subframeP,
		 dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.
		 aggregation_level, ra->RA_rnti)) {
		LOG_D(MAC,
		      "Frame %d: Subframe %d : Adding common DCI for RA_RNTI %x\n",
		      frameP, subframeP, ra->RA_rnti);
		dl_req->number_dci++;
		dl_req->number_pdu++;

		dl_config_pdu =
		    &dl_req->dl_config_pdu_list[dl_req->number_pdu];
		memset((void *) dl_config_pdu, 0,
		       sizeof(nfapi_dl_config_request_pdu_t));
		dl_config_pdu->pdu_type = NFAPI_DL_CONFIG_DLSCH_PDU_TYPE;
		dl_config_pdu->pdu_size =
		    (uint8_t) (2 + sizeof(nfapi_dl_config_dlsch_pdu));
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.pdu_index =
		    mac->pdu_index[CC_idP];
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.rnti = ra->RA_rnti;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.resource_allocation_type = 2;	// format 1A/1B/1D
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.virtual_resource_block_assignment_flag = 0;	// localized
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.
		    resource_block_coding = getRIV(N_RB_DL, first_rb, 4);
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.modulation = 2;	//QPSK
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.
		    redundancy_version = 0;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.transport_blocks = 1;	// first block
		dl_config_pdu->dlsch_pdu.
		    dlsch_pdu_rel8.transport_block_to_codeword_swap_flag =
		    0;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.
		    transmission_scheme = (cc->p_eNB == 1) ? 0 : 1;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.number_of_layers =
		    1;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.
		    number_of_subbands = 1;
		//    dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.codebook_index                         = ;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.
		    ue_category_capacity = 1;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.pa = 4;	// 0 dB
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.
		    delta_power_offset_index = 0;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.ngap = 0;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.nprb = get_subbandsize(cc->mib->message.dl_Bandwidth);	// ignored
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.transmission_mode =
		    (cc->p_eNB == 1) ? 1 : 2;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.
		    num_bf_prb_per_subband = 1;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.num_bf_vector = 1;
		//    dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.bf_vector                    = ; 
		dl_req->number_pdu++;

		// Program UL processing for Msg3
		get_Msg3alloc(&cc[CC_idP], subframeP, frameP,
			      &ra->Msg3_frame, &ra->Msg3_subframe);

		LOG_D(MAC,
		      "Frame %d, Subframe %d: Setting Msg3 reception for Frame %d Subframe %d\n",
		      frameP, subframeP, ra->Msg3_frame,
		      ra->Msg3_subframe);

		fill_rar(module_idP, CC_idP, ra, frameP,
			 cc[CC_idP].RAR_pdu.payload, N_RB_DL, 7);
		add_msg3(module_idP, CC_idP, ra, frameP, subframeP);
		ra->state = WAITMSG3;

		// DL request
		mac->TX_req[CC_idP].sfn_sf = (frameP << 4) + subframeP;
		TX_req =
		    &mac->TX_req[CC_idP].tx_request_body.tx_pdu_list[mac->
								     TX_req
								     [CC_idP].
								     tx_request_body.number_of_pdus];
		TX_req->pdu_length = 7;	// This should be changed if we have more than 1 preamble 
		TX_req->pdu_index = mac->pdu_index[CC_idP]++;
		TX_req->num_segments = 1;
		TX_req->segments[0].segment_length = 7;
		TX_req->segments[0].segment_data =
		    cc[CC_idP].RAR_pdu.payload;
		mac->TX_req[CC_idP].tx_request_body.number_of_pdus++;
	    }			// PDCCH CCE allocation is feasible
	}			// Msg2 frame/subframe condition
    }				// else BL/CE
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}
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void
generate_Msg4(module_id_t module_idP, int CC_idP, frame_t frameP,
	      sub_frame_t subframeP, RA_t * ra)
{
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    eNB_MAC_INST *mac = RC.mac[module_idP];
    COMMON_channels_t *cc = mac->common_channels;
    int16_t rrc_sdu_length;
    int UE_id = -1;
    uint16_t msg4_padding;
    uint16_t msg4_post_padding;
    uint16_t msg4_header;
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    uint8_t *vrb_map;
    int first_rb;
    int N_RB_DL;
    nfapi_dl_config_request_pdu_t *dl_config_pdu;
    nfapi_ul_config_request_pdu_t *ul_config_pdu;
    nfapi_tx_request_pdu_t *TX_req;
    UE_list_t *UE_list = &mac->UE_list;
    nfapi_dl_config_request_body_t *dl_req;
    nfapi_ul_config_request_body_t *ul_req;
    uint8_t lcid;
    uint8_t offset;
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#ifdef Rel14
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    int rmax = 0;
    int rep = 0;
    int reps = 0;


    first_rb = 0;
    struct PRACH_ConfigSIB_v1310 *ext4_prach;
    struct PUCCH_ConfigCommon_v1310 *ext4_pucch;
    PRACH_ParametersListCE_r13_t *prach_ParametersListCE_r13;
    struct N1PUCCH_AN_InfoList_r13 *pucch_N1PUCCH_AN_InfoList_r13;
    PRACH_ParametersCE_r13_t *p[4] = { NULL, NULL, NULL, NULL };
    int pucchreps[4] = { 1, 1, 1, 1 };
    int n1pucchan[4] = { 0, 0, 0, 0 };

    if (cc[CC_idP].radioResourceConfigCommon_BR) {

	ext4_prach =
	    cc[CC_idP].radioResourceConfigCommon_BR->ext4->
	    prach_ConfigCommon_v1310;
	ext4_pucch =
	    cc[CC_idP].radioResourceConfigCommon_BR->ext4->
	    pucch_ConfigCommon_v1310;
	prach_ParametersListCE_r13 =
	    &ext4_prach->prach_ParametersListCE_r13;
	pucch_N1PUCCH_AN_InfoList_r13 =
	    ext4_pucch->n1PUCCH_AN_InfoList_r13;
	AssertFatal(prach_ParametersListCE_r13 != NULL,
		    "prach_ParametersListCE_r13 is null\n");
	AssertFatal(pucch_N1PUCCH_AN_InfoList_r13 != NULL,
		    "pucch_N1PUCCH_AN_InfoList_r13 is null\n");
	// check to verify CE-Level compatibility in SIB2_BR
	AssertFatal(prach_ParametersListCE_r13->list.count ==
		    pucch_N1PUCCH_AN_InfoList_r13->list.count,
		    "prach_ParametersListCE_r13->list.count!= pucch_N1PUCCH_AN_InfoList_r13->list.count\n");

	switch (prach_ParametersListCE_r13->list.count) {
	case 4:
	    p[3] = prach_ParametersListCE_r13->list.array[3];
	    n1pucchan[3] = *pucch_N1PUCCH_AN_InfoList_r13->list.array[3];
	    AssertFatal(ext4_pucch->pucch_NumRepetitionCE_Msg4_Level3_r13
			!= NULL,
			"pucch_NumRepetitionCE_Msg4_Level3 shouldn't be NULL\n");
	    pucchreps[3] =
		(int) (4 << *ext4_pucch->
		       pucch_NumRepetitionCE_Msg4_Level3_r13);

	case 3:
	    p[2] = prach_ParametersListCE_r13->list.array[2];
	    n1pucchan[2] = *pucch_N1PUCCH_AN_InfoList_r13->list.array[2];
	    AssertFatal(ext4_pucch->pucch_NumRepetitionCE_Msg4_Level2_r13
			!= NULL,
			"pucch_NumRepetitionCE_Msg4_Level2 shouldn't be NULL\n");
	    pucchreps[2] =
		(int) (4 << *ext4_pucch->
		       pucch_NumRepetitionCE_Msg4_Level2_r13);
	case 2:
	    p[1] = prach_ParametersListCE_r13->list.array[1];
	    n1pucchan[1] = *pucch_N1PUCCH_AN_InfoList_r13->list.array[1];
	    AssertFatal(ext4_pucch->pucch_NumRepetitionCE_Msg4_Level2_r13
			!= NULL,
			"pucch_NumRepetitionCE_Msg4_Level1 shouldn't be NULL\n");
	    pucchreps[1] =
		(int) (1 << *ext4_pucch->
		       pucch_NumRepetitionCE_Msg4_Level1_r13);
	case 1:
	    p[0] = prach_ParametersListCE_r13->list.array[0];
	    n1pucchan[0] = *pucch_N1PUCCH_AN_InfoList_r13->list.array[0];
	    AssertFatal(ext4_pucch->pucch_NumRepetitionCE_Msg4_Level2_r13
			!= NULL,
			"pucch_NumRepetitionCE_Msg4_Level0 shouldn't be NULL\n");
	    pucchreps[0] =
		(int) (1 << *ext4_pucch->
		       pucch_NumRepetitionCE_Msg4_Level0_r13);
	default:
	    AssertFatal(1 == 0,
			"Illegal count for prach_ParametersListCE_r13 %d\n",
			prach_ParametersListCE_r13->list.count);
	}
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    }
#endif

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    vrb_map = cc[CC_idP].vrb_map;

    dl_req = &mac->DL_req[CC_idP].dl_config_request_body;
    dl_config_pdu = &dl_req->dl_config_pdu_list[dl_req->number_pdu];
    N_RB_DL = to_prb(cc[CC_idP].mib->message.dl_Bandwidth);

    UE_id = find_UE_id(module_idP, ra->rnti);
    AssertFatal(UE_id >= 0, "Can't find UE for t-crnti\n");

    // set HARQ process round to 0 for this UE

    if (cc->tdd_Config)
	ra->harq_pid = ((frameP * 10) + subframeP) % 10;
    else
	ra->harq_pid = ((frameP * 10) + subframeP) & 7;


    // Get RRCConnectionSetup for Piggyback
    rrc_sdu_length = mac_rrc_data_req(module_idP, CC_idP, frameP, CCCH, 1,	// 1 transport block
				      &cc[CC_idP].CCCH_pdu.payload[0], ENB_FLAG_YES, module_idP, 0);	// not used in this case

    AssertFatal(rrc_sdu_length > 0,
		"[MAC][eNB Scheduler] CCCH not allocated\n");


    LOG_D(MAC,
	  "[eNB %d][RAPROC] CC_id %d Frame %d, subframeP %d: UE_id %d, rrc_sdu_length %d\n",
	  module_idP, CC_idP, frameP, subframeP, UE_id, rrc_sdu_length);


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#ifdef Rel14
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    if (ra->rach_resource_type > 0) {

	// Generate DCI + repetitions first
	// This uses an MPDCCH Type 2 allocation according to Section 9.1.5 36-213, Type2 common allocation according to Table 7.1-8 (36-213)
	// Parameters:
	//    p=2+4 PRB set (number of PRB pairs 6)
	//    rmax = mpdcch-NumRepetition-RA-r13 => Table 9.1.5-3
	//    if CELevel = 0,1 => Table 9.1.5-1b for MPDCCH candidates
	//    if CELevel = 2,3 => Table 9.1.5-2b for MPDCCH candidates
	//    distributed transmission

	// rmax from SIB2 information
	rmax = p[ra->rach_resource_type - 1]->mpdcch_NumRepetition_RA_r13;
	AssertFatal(rmax >= 4,
		    "choose rmax>=4 for enough repeititions, or reduce rep to 1 or 2\n");

	// choose r3 by default for Msg4 (this is ok from table 9.1.5-3 for rmax = >=4, if we choose rmax <4 it has to be less
	rep = 2;
	// get actual repetition count from Table 9.1.5-3
	reps = (rmax <= 8) ? (1 << rep) : (rmax >> (3 - rep));
	// get first narrowband
	first_rb =
	    narrowband_to_first_rb(&cc[CC_idP], ra->msg34_narrowband);

	if ((ra->msg4_mpdcch_repetition_cnt == 0) &&
	    (mpdcch_sf_condition
	     (mac, CC_idP, frameP, subframeP, rmax, TYPE2, -1) > 0)) {
	    // MPDCCH configuration for RAR

	    memset((void *) dl_config_pdu, 0,
		   sizeof(nfapi_dl_config_request_pdu_t));
	    dl_config_pdu->pdu_type = NFAPI_DL_CONFIG_MPDCCH_PDU_TYPE;
	    dl_config_pdu->pdu_size =
		(uint8_t) (2 + sizeof(nfapi_dl_config_mpdcch_pdu));
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.dci_format =
		(ra->rach_resource_type > 1) ? 11 : 10;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.mpdcch_narrow_band =
		ra->msg34_narrowband;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.
		number_of_prb_pairs = 6;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.resource_block_assignment = 0;	// Note: this can be dynamic
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.
		mpdcch_tansmission_type = 1;
	    AssertFatal(cc[CC_idP].
			sib1_v13ext->bandwidthReducedAccessRelatedInfo_r13
			!= NULL,
			"cc[CC_idP].sib1_v13ext->bandwidthReducedAccessRelatedInfo_r13 is null\n");
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.start_symbol =
		cc[CC_idP].sib1_v13ext->
		bandwidthReducedAccessRelatedInfo_r13->startSymbolBR_r13;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.ecce_index = 0;	// Note: this should be dynamic
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.aggregation_level = 16;	// OK for CEModeA r1-3 (9.1.5-1b) or CEModeB r1-4
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.rnti_type = 0;	// t-C-RNTI
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.rnti = ra->RA_rnti;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.ce_mode =
		(ra->rach_resource_type < 3) ? 1 : 2;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.drms_scrambling_init = cc[CC_idP].physCellId;	/// Check this is still N_id_cell for type2 common
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.
		initial_transmission_sf_io = (frameP * 10) + subframeP;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.transmission_power = 6000;	// 0dB
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.resource_block_coding = getRIV(6, 0, 6);	// check if not getRIV(N_RB_DL,first_rb,6);
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.mcs = 4;	// adjust according to size of Msg4, 208 bits with N1A_PRB=3
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.pdsch_reptition_levels = 4;	// fix to 4 for now
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.redundancy_version =
		0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.new_data_indicator =
		0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.harq_process =
		ra->harq_pid;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.tpmi_length = 0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.tpmi = 0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.pmi_flag = 0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.pmi = 0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.
		harq_resource_offset = 0;
	    dl_config_pdu->mpdcch_pdu.
		mpdcch_pdu_rel13.dci_subframe_repetition_number = rep;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.tpc = 1;	// N1A_PRB=3; => 208 bits
	    dl_config_pdu->mpdcch_pdu.
		mpdcch_pdu_rel13.downlink_assignment_index_length = 0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.
		downlink_assignment_index = 0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.
		allocate_prach_flag = 0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.preamble_index = 0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.prach_mask_index =
		0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.starting_ce_level =
		0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.srs_request = 0;
	    dl_config_pdu->mpdcch_pdu.
		mpdcch_pdu_rel13.antenna_ports_and_scrambling_identity_flag
		= 0;
	    dl_config_pdu->mpdcch_pdu.
		mpdcch_pdu_rel13.antenna_ports_and_scrambling_identity = 0;
	    dl_config_pdu->mpdcch_pdu.
		mpdcch_pdu_rel13.frequency_hopping_enabled_flag = 0;
	    dl_config_pdu->mpdcch_pdu.
		mpdcch_pdu_rel13.paging_direct_indication_differentiation_flag
		= 0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.direct_indication =
		0;
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.total_dci_length_including_padding = 0;	// this is not needed by OAI L1, but should be filled in
	    dl_config_pdu->mpdcch_pdu.mpdcch_pdu_rel13.
		number_of_tx_antenna_ports = 1;
	    ra->msg4_mpdcch_repetition_cnt++;
	    dl_req->number_pdu++;
889

890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299
	}			//repetition_count==0 && SF condition met
	else if (ra->msg4_mpdcch_repetition_cnt > 0) {	// we're in a stream of repetitions
	    ra->msg4_mpdcch_repetition_cnt++;
	    if (ra->msg4_mpdcch_repetition_cnt == reps) {	// this is the last mpdcch repetition
		if (cc[CC_idP].tdd_Config == NULL) {	// FDD case
		    // wait 2 subframes for PDSCH transmission
		    if (subframeP > 7)
			ra->Msg4_frame = (frameP + 1) & 1023;
		    else
			ra->Msg4_frame = frameP;
		    ra->Msg4_subframe = (subframeP + 2) % 10;
		} else {
		    AssertFatal(1 == 0, "TDD case not done yet\n");
		}
	    }			// mpdcch_repetition_count == reps
	    if ((ra->Msg4_frame == frameP)
		&& (ra->Msg4_subframe == subframeP)) {

		// Program PDSCH

		LOG_D(MAC,
		      "[eNB %d][RAPROC] CC_id %d Frame %d, subframeP %d: Generating Msg4 BR with RRC Piggyback (ce_level %d RNTI %x)\n",
		      module_idP, CC_idP, frameP, subframeP,
		      ra->rach_resource_type - 1, ra->rnti);

		AssertFatal(1 == 0,
			    "Msg4 generation not finished for BL/CE UE\n");
		dl_config_pdu =
		    &dl_req->dl_config_pdu_list[dl_req->number_pdu];
		memset((void *) dl_config_pdu, 0,
		       sizeof(nfapi_dl_config_request_pdu_t));
		dl_config_pdu->pdu_type = NFAPI_DL_CONFIG_DLSCH_PDU_TYPE;
		dl_config_pdu->pdu_size =
		    (uint8_t) (2 + sizeof(nfapi_dl_config_dlsch_pdu));
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.pdu_index =
		    mac->pdu_index[CC_idP];
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.rnti = ra->rnti;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.resource_allocation_type = 2;	// format 1A/1B/1D
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.virtual_resource_block_assignment_flag = 0;	// localized
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.resource_block_coding = getRIV(N_RB_DL, first_rb, 6);	// check that this isn't getRIV(6,0,6)
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.modulation = 2;	//QPSK
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.
		    redundancy_version = 0;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.transport_blocks = 1;	// first block
		dl_config_pdu->dlsch_pdu.
		    dlsch_pdu_rel8.transport_block_to_codeword_swap_flag =
		    0;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.
		    transmission_scheme = (cc->p_eNB == 1) ? 0 : 1;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.number_of_layers =
		    1;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.
		    number_of_subbands = 1;
		//      dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.codebook_index                         = ;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.
		    ue_category_capacity = 1;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.pa = 4;	// 0 dB
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.
		    delta_power_offset_index = 0;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.ngap = 0;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.nprb = get_subbandsize(cc->mib->message.dl_Bandwidth);	// ignored
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.transmission_mode =
		    (cc->p_eNB == 1) ? 1 : 2;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.
		    num_bf_prb_per_subband = 1;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.num_bf_vector = 1;
		//      dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.bf_vector                    = ; 

		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel10.pdsch_start =
		    cc[CC_idP].
		    sib1_v13ext->bandwidthReducedAccessRelatedInfo_r13->
		    startSymbolBR_r13;

		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel13.ue_type =
		    (ra->rach_resource_type < 3) ? 1 : 2;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel13.pdsch_payload_type = 2;	// not SI message
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel13.
		    initial_transmission_sf_io = (10 * frameP) + subframeP;
		dl_config_pdu->dlsch_pdu.dlsch_pdu_rel13.drms_table_flag =
		    0;
		dl_req->number_pdu++;

		ra->state = WAITMSG4ACK;

		lcid = 0;

		UE_list->UE_sched_ctrl[UE_id].round[CC_idP][ra->harq_pid] =
		    0;
		msg4_header = 1 + 6 + 1;	// CR header, CR CE, SDU header

		if ((ra->msg4_TBsize - rrc_sdu_length - msg4_header) <= 2) {
		    msg4_padding =
			ra->msg4_TBsize - rrc_sdu_length - msg4_header;
		    msg4_post_padding = 0;
		} else {
		    msg4_padding = 0;
		    msg4_post_padding =
			ra->msg4_TBsize - rrc_sdu_length - msg4_header - 1;
		}

		LOG_D(MAC,
		      "[eNB %d][RAPROC] CC_id %d Frame %d subframeP %d Msg4 : TBS %d, sdu_len %d, msg4_header %d, msg4_padding %d, msg4_post_padding %d\n",
		      module_idP, CC_idP, frameP, subframeP,
		      ra->msg4_TBsize, rrc_sdu_length, msg4_header,
		      msg4_padding, msg4_post_padding);
		DevAssert(UE_id != UE_INDEX_INVALID);	// FIXME not sure how to gracefully return
		// CHECK THIS: &cc[CC_idP].CCCH_pdu.payload[0]
		offset = generate_dlsch_header((unsigned char *) mac->UE_list.DLSCH_pdu[CC_idP][0][(unsigned char) UE_id].payload[0], 1,	//num_sdus
					       (unsigned short *) &rrc_sdu_length,	//
					       &lcid,	// sdu_lcid
					       255,	// no drx
					       31,	// no timing advance
					       ra->cont_res_id,	// contention res id
					       msg4_padding,	// no padding
					       msg4_post_padding);

		memcpy((void *) &mac->UE_list.
		       DLSCH_pdu[CC_idP][0][(unsigned char)
					    UE_id].payload[0][(unsigned
							       char)
							      offset],
		       &cc[CC_idP].CCCH_pdu.payload[0], rrc_sdu_length);

		// DL request
		mac->TX_req[CC_idP].sfn_sf = (frameP << 4) + subframeP;
		TX_req =
		    &mac->TX_req[CC_idP].tx_request_body.tx_pdu_list[mac->
								     TX_req
								     [CC_idP].
								     tx_request_body.number_of_pdus];
		TX_req->pdu_length = rrc_sdu_length;
		TX_req->pdu_index = mac->pdu_index[CC_idP]++;
		TX_req->num_segments = 1;
		TX_req->segments[0].segment_length = rrc_sdu_length;
		TX_req->segments[0].segment_data =
		    mac->UE_list.
		    DLSCH_pdu[CC_idP][0][(unsigned char) UE_id].payload[0];
		mac->TX_req[CC_idP].tx_request_body.number_of_pdus++;

		// Program ACK/NAK for Msg4 PDSCH
		int absSF = (ra->Msg3_frame * 10) + ra->Msg3_subframe;
		// see Section 10.2 from 36.213
		int ackNAK_absSF = absSF + reps + 4;
		AssertFatal(reps > 2,
			    "Have to handle programming of ACK when PDSCH repetitions is > 2\n");
		ul_req =
		    &mac->UL_req_tmp[CC_idP][ackNAK_absSF %
					     10].ul_config_request_body;
		ul_config_pdu =
		    &ul_req->ul_config_pdu_list[ul_req->number_of_pdus];

		ul_config_pdu->pdu_type =
		    NFAPI_UL_CONFIG_UCI_HARQ_PDU_TYPE;
		ul_config_pdu->pdu_size =
		    (uint8_t) (2 + sizeof(nfapi_ul_config_uci_harq_pdu));
		ul_config_pdu->uci_harq_pdu.ue_information.ue_information_rel8.handle = 0;	// don't know how to use this
		ul_config_pdu->uci_harq_pdu.
		    ue_information.ue_information_rel8.rnti = ra->rnti;
		ul_config_pdu->uci_harq_pdu.
		    ue_information.ue_information_rel13.ue_type =
		    (ra->rach_resource_type < 3) ? 1 : 2;
		ul_config_pdu->uci_harq_pdu.
		    ue_information.ue_information_rel13.empty_symbols = 0;
		ul_config_pdu->uci_harq_pdu.ue_information.
		    ue_information_rel13.total_number_of_repetitions =
		    pucchreps[ra->rach_resource_type - 1];
		ul_config_pdu->uci_harq_pdu.
		    ue_information.ue_information_rel13.repetition_number =
		    0;
		// Note need to keep sending this across reptitions!!!! Not really for PUCCH, to ask small-cell forum, we'll see for the other messages, maybe parameters change across repetitions and FAPI has to provide for that
		if (cc[CC_idP].tdd_Config == NULL) {	// FDD case
		    ul_config_pdu->uci_harq_pdu.
			harq_information.harq_information_rel8_fdd.
			n_pucch_1_0 =
			n1pucchan[ra->rach_resource_type - 1];
		    // NOTE: How to fill in the rest of the n_pucch_1_0 information 213 Section 10.1.2.1 in the general case
		    // = N_ECCE_q + Delta_ARO + n1pucchan[ce_level]
		    // higher in the MPDCCH configuration, N_ECCE_q is hard-coded to 0, and harq resource offset to 0 =>
		    // Delta_ARO = 0 from Table 10.1.2.1-1
		    ul_config_pdu->uci_harq_pdu.harq_information.harq_information_rel8_fdd.harq_size = 1;	// 1-bit ACK/NAK
		} else {
		    AssertFatal(1 == 0,
				"PUCCH configuration for ACK/NAK not handled yet for TDD BL/CE case\n");
		}
		ul_req->number_of_pdus++;
		T(T_ENB_MAC_UE_DL_PDU_WITH_DATA, T_INT(module_idP),
		  T_INT(CC_idP), T_INT(ra->rnti), T_INT(frameP),
		  T_INT(subframeP), T_INT(0 /*harq_pid always 0? */ ),
		  T_BUFFER(&mac->UE_list.DLSCH_pdu[CC_idP][0][UE_id].
			   payload[0], ra->msg4_TBsize));

		if (opt_enabled == 1) {
		    trace_pdu(1,
			      (uint8_t *) mac->
			      UE_list.DLSCH_pdu[CC_idP][0][(unsigned char)
							   UE_id].payload
			      [0], rrc_sdu_length, UE_id, 3,
			      UE_RNTI(module_idP, UE_id), mac->frame,
			      mac->subframe, 0, 0);
		    LOG_D(OPT,
			  "[eNB %d][DLSCH] CC_id %d Frame %d trace pdu for rnti %x with size %d\n",
			  module_idP, CC_idP, frameP, UE_RNTI(module_idP,
							      UE_id),
			  rrc_sdu_length);
		}
	    }			// Msg4 frame/subframe
	}			// msg4_mpdcch_repetition_count
    }				// rach_resource_type > 0 
    else
#endif
    {				// This is normal LTE case
	if ((ra->Msg4_frame == frameP) && (ra->Msg4_subframe == subframeP)) {
	    LOG_D(MAC,
		  "[eNB %d][RAPROC] CC_id %d Frame %d, subframeP %d: Generating Msg4 with RRC Piggyback (RNTI %x)\n",
		  module_idP, CC_idP, frameP, subframeP, ra->rnti);

	    /// Choose first 4 RBs for Msg4, should really check that these are free!
	    first_rb = 0;

	    vrb_map[first_rb] = 1;
	    vrb_map[first_rb + 1] = 1;
	    vrb_map[first_rb + 2] = 1;
	    vrb_map[first_rb + 3] = 1;


	    // Compute MCS/TBS for 3 PRB (coded on 4 vrb)
	    msg4_header = 1 + 6 + 1;	// CR header, CR CE, SDU header

	    if ((rrc_sdu_length + msg4_header) <= 22) {
		ra->msg4_mcs = 4;
		ra->msg4_TBsize = 22;
	    } else if ((rrc_sdu_length + msg4_header) <= 28) {
		ra->msg4_mcs = 5;
		ra->msg4_TBsize = 28;
	    } else if ((rrc_sdu_length + msg4_header) <= 32) {
		ra->msg4_mcs = 6;
		ra->msg4_TBsize = 32;
	    } else if ((rrc_sdu_length + msg4_header) <= 41) {
		ra->msg4_mcs = 7;
		ra->msg4_TBsize = 41;
	    } else if ((rrc_sdu_length + msg4_header) <= 49) {
		ra->msg4_mcs = 8;
		ra->msg4_TBsize = 49;
	    } else if ((rrc_sdu_length + msg4_header) <= 57) {
		ra->msg4_mcs = 9;
		ra->msg4_TBsize = 57;
	    }

	    fill_nfapi_dl_dci_1A(dl_config_pdu, 4,	// aggregation_level
				 ra->rnti,	// rnti
				 1,	// rnti_type, CRNTI
				 ra->harq_pid,	// harq_process
				 1,	// tpc, none
				 getRIV(N_RB_DL, first_rb, 4),	// resource_block_coding
				 ra->msg4_mcs,	// mcs
				 1,	// ndi
				 0,	// rv
				 0);	// vrb_flag
	    LOG_D(MAC,
		  "Frame %d, subframe %d: Msg4 DCI pdu_num %d (rnti %x,rnti_type %d,harq_pid %d, resource_block_coding (%p) %d\n",
		  frameP, subframeP, dl_req->number_pdu,
		  dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.rnti,
		  dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.rnti_type,
		  dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.harq_process,
		  &dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.
		  resource_block_coding,
		  dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.
		  resource_block_coding);
	    AssertFatal(dl_config_pdu->dci_dl_pdu.
			dci_dl_pdu_rel8.resource_block_coding < 8192,
			"resource_block_coding %u < 8192\n",
			dl_config_pdu->dci_dl_pdu.
			dci_dl_pdu_rel8.resource_block_coding);
	    if (!CCE_allocation_infeasible
		(module_idP, CC_idP, 1, subframeP,
		 dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.
		 aggregation_level, ra->rnti)) {
		dl_req->number_dci++;
		dl_req->number_pdu++;

		ra->state = WAITMSG4ACK;

		// increment Absolute subframe by 8 for Msg4 retransmission
		LOG_D(MAC,
		      "Frame %d, Subframe %d: Preparing for Msg4 retransmission currently %d.%d\n",
		      frameP, subframeP, ra->Msg4_frame,
		      ra->Msg4_subframe);
		if (ra->Msg4_subframe > 1)
		    ra->Msg4_frame++;
		ra->Msg4_frame &= 1023;
		ra->Msg4_subframe = (ra->Msg4_subframe + 8) % 10;
		LOG_D(MAC,
		      "Frame %d, Subframe %d: Msg4 retransmission in %d.%d\n",
		      frameP, subframeP, ra->Msg4_frame,
		      ra->Msg4_subframe);
		lcid = 0;

		// put HARQ process round to 0
		if (cc->tdd_Config)
		    ra->harq_pid = ((frameP * 10) + subframeP) % 10;
		else
		    ra->harq_pid = ((frameP * 10) + subframeP) & 7;
		UE_list->UE_sched_ctrl[UE_id].round[CC_idP][ra->harq_pid] =
		    0;

		if ((ra->msg4_TBsize - rrc_sdu_length - msg4_header) <= 2) {
		    msg4_padding =
			ra->msg4_TBsize - rrc_sdu_length - msg4_header;
		    msg4_post_padding = 0;
		} else {
		    msg4_padding = 0;
		    msg4_post_padding =
			ra->msg4_TBsize - rrc_sdu_length - msg4_header - 1;
		}

		LOG_D(MAC,
		      "[eNB %d][RAPROC] CC_idP %d Frame %d subframeP %d Msg4 : TBS %d, sdu_len %d, msg4_header %d, msg4_padding %d, msg4_post_padding %d\n",
		      module_idP, CC_idP, frameP, subframeP,
		      ra->msg4_TBsize, rrc_sdu_length, msg4_header,
		      msg4_padding, msg4_post_padding);
		DevAssert(UE_id != UE_INDEX_INVALID);	// FIXME not sure how to gracefully return
		// CHECK THIS: &cc[CC_idP].CCCH_pdu.payload[0]
		offset = generate_dlsch_header((unsigned char *) mac->UE_list.DLSCH_pdu[CC_idP][0][(unsigned char) UE_id].payload[0], 1,	//num_sdus
					       (unsigned short *) &rrc_sdu_length,	//
					       &lcid,	// sdu_lcid
					       255,	// no drx
					       31,	// no timing advance
					       ra->cont_res_id,	// contention res id
					       msg4_padding,	// no padding
					       msg4_post_padding);

		memcpy((void *) &mac->UE_list.
		       DLSCH_pdu[CC_idP][0][(unsigned char)
					    UE_id].payload[0][(unsigned
							       char)
							      offset],
		       &cc[CC_idP].CCCH_pdu.payload[0], rrc_sdu_length);

		// DLSCH Config
		fill_nfapi_dlsch_config(mac, dl_req, ra->msg4_TBsize, mac->pdu_index[CC_idP], ra->rnti, 2,	// resource_allocation_type : format 1A/1B/1D
					0,	// virtual_resource_block_assignment_flag : localized
					getRIV(N_RB_DL, first_rb, 4),	// resource_block_coding : RIV, 4 PRB
					2,	// modulation: QPSK
					0,	// redundancy version
					1,	// transport_blocks
					0,	// transport_block_to_codeword_swap_flag (0)
					(cc->p_eNB == 1) ? 0 : 1,	// transmission_scheme
					1,	// number of layers
					1,	// number of subbands
					//0,                         // codebook index 
					1,	// ue_category_capacity
					4,	// pa: 0 dB
					0,	// delta_power_offset_index
					0,	// ngap
					1,	// NPRB = 3 like in DCI
					(cc->p_eNB == 1) ? 1 : 2,	// transmission mode
					1,	// num_bf_prb_per_subband
					1);	// num_bf_vector
		LOG_D(MAC,
		      "Filled DLSCH config, pdu number %d, non-dci pdu_index %d\n",
		      dl_req->number_pdu, mac->pdu_index[CC_idP]);

		// DL request
		mac->TX_req[CC_idP].sfn_sf =
		    fill_nfapi_tx_req(&mac->TX_req[CC_idP].tx_request_body,
				      (frameP * 10) + subframeP,
				      rrc_sdu_length,
				      mac->pdu_index[CC_idP],
				      mac->UE_list.
				      DLSCH_pdu[CC_idP][0][(unsigned char)
							   UE_id].payload
				      [0]);
		mac->pdu_index[CC_idP]++;

		LOG_D(MAC, "Filling UCI ACK/NAK information, cce_idx %d\n",
		      dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.cce_idx);
		// Program PUCCH1a for ACK/NAK
		// Program ACK/NAK for Msg4 PDSCH
		fill_nfapi_uci_acknak(module_idP,
				      CC_idP,
				      ra->rnti,
				      (frameP * 10) + subframeP,
				      dl_config_pdu->dci_dl_pdu.
				      dci_dl_pdu_rel8.cce_idx);


		T(T_ENB_MAC_UE_DL_PDU_WITH_DATA, T_INT(module_idP),
		  T_INT(CC_idP), T_INT(ra->rnti), T_INT(frameP),
		  T_INT(subframeP), T_INT(0 /*harq_pid always 0? */ ),
		  T_BUFFER(&mac->UE_list.DLSCH_pdu[CC_idP][0][UE_id].
			   payload[0], ra->msg4_TBsize));

		if (opt_enabled == 1) {
		    trace_pdu(1,
			      (uint8_t *) mac->
			      UE_list.DLSCH_pdu[CC_idP][0][(unsigned char)
							   UE_id].payload
			      [0], rrc_sdu_length, UE_id, 3,
			      UE_RNTI(module_idP, UE_id), mac->frame,
			      mac->subframe, 0, 0);
		    LOG_D(OPT,
			  "[eNB %d][DLSCH] CC_id %d Frame %d trace pdu for rnti %x with size %d\n",
			  module_idP, CC_idP, frameP, UE_RNTI(module_idP,
							      UE_id),
			  rrc_sdu_length);
		}

	    }			// CCE Allocation feasible
	}			// msg4 frame/subframe
    }				// else rach_resource_type
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}

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void
check_Msg4_retransmission(module_id_t module_idP, int CC_idP,
			  frame_t frameP, sub_frame_t subframeP, RA_t * ra)
{

    eNB_MAC_INST *mac = RC.mac[module_idP];
    COMMON_channels_t *cc = mac->common_channels;
    int UE_id = -1;
    uint8_t *vrb_map;
    int first_rb;
    int N_RB_DL;
    nfapi_dl_config_request_pdu_t *dl_config_pdu;
    UE_list_t *UE_list = &mac->UE_list;
    nfapi_dl_config_request_body_t *dl_req;

    int round;
    /*
       #ifdef Rel14
       COMMON_channels_t               *cc  = mac->common_channels;

       int rmax            = 0;
       int rep             = 0; 
       int reps            = 0;

       first_rb        = 0;
       struct PRACH_ConfigSIB_v1310 *ext4_prach;
       PRACH_ParametersListCE_r13_t *prach_ParametersListCE_r13;
       PRACH_ParametersCE_r13_t *p[4];

       if (cc[CC_idP].radioResourceConfigCommon_BR) {

       ext4_prach                 = cc[CC_idP].radioResourceConfigCommon_BR->ext4->prach_ConfigCommon_v1310;
       prach_ParametersListCE_r13 = &ext4_prach->prach_ParametersListCE_r13;

       switch (prach_ParametersListCE_r13->list.count) {
       case 4:
       p[3]=prach_ParametersListCE_r13->list.array[3];
       case 3:
       p[2]=prach_ParametersListCE_r13->list.array[2];
       case 2:
       p[1]=prach_ParametersListCE_r13->list.array[1];
       case 1:
       p[0]=prach_ParametersListCE_r13->list.array[0];
       default:
       AssertFatal(1==0,"Illegal count for prach_ParametersListCE_r13 %d\n",prach_ParametersListCE_r13->list.count);
       }
       }
       #endif
     */

    // check HARQ status and retransmit if necessary


    UE_id = find_UE_id(module_idP, ra->rnti);
    AssertFatal(UE_id >= 0, "Can't find UE for t-crnti\n");

    round = UE_list->UE_sched_ctrl[UE_id].round[CC_idP][ra->harq_pid];
    vrb_map = cc[CC_idP].vrb_map;

    dl_req = &mac->DL_req[CC_idP].dl_config_request_body;
    dl_config_pdu = &dl_req->dl_config_pdu_list[dl_req->number_pdu];
    N_RB_DL = to_prb(cc[CC_idP].mib->message.dl_Bandwidth);

    LOG_D(MAC,
	  "[eNB %d][RAPROC] CC_id %d Frame %d, subframeP %d: Checking if Msg4 for harq_pid %d was acknowledged (round %d)\n",
	  module_idP, CC_idP, frameP, subframeP, ra->harq_pid, round);

    if (round != 8) {

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#ifdef Rel14
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	if (ra->rach_resource_type > 0) {
	    AssertFatal(1 == 0,
			"Msg4 Retransmissions not handled yet for BL/CE UEs\n");
	} else
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#endif
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	{
	    if ((ra->Msg4_frame == frameP)
		&& (ra->Msg4_subframe == subframeP)) {

		//ra->wait_ack_Msg4++;
		// we have to schedule a retransmission

		first_rb = 0;
		vrb_map[first_rb] = 1;
		vrb_map[first_rb + 1] = 1;
		vrb_map[first_rb + 2] = 1;
		vrb_map[first_rb + 3] = 1;

		fill_nfapi_dl_dci_1A(dl_config_pdu, 4,	// aggregation_level
				     ra->rnti,	// rnti
				     1,	// rnti_type, CRNTI
				     ra->harq_pid,	// harq_process
				     1,	// tpc, none
				     getRIV(N_RB_DL, first_rb, 4),	// resource_block_coding
				     ra->msg4_mcs,	// mcs
				     1,	// ndi
				     round & 3,	// rv
				     0);	// vrb_flag

		if (!CCE_allocation_infeasible
		    (module_idP, CC_idP, 1, subframeP,
		     dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.
		     aggregation_level, ra->rnti)) {
		    dl_req->number_dci++;
		    dl_req->number_pdu++;

		    LOG_D(MAC,
			  "msg4 retransmission for rnti %x (round %d) fsf %d/%d\n",
			  ra->rnti, round, frameP, subframeP);
		    // DLSCH Config
		    fill_nfapi_dlsch_config(mac, dl_req, ra->msg4_TBsize,
					    -1
					    /* retransmission, no pdu_index */
					    , ra->rnti, 2,	// resource_allocation_type : format 1A/1B/1D
					    0,	// virtual_resource_block_assignment_flag : localized
					    getRIV(N_RB_DL, first_rb, 4),	// resource_block_coding : RIV, 4 PRB
					    2,	// modulation: QPSK
					    round & 3,	// redundancy version
					    1,	// transport_blocks
					    0,	// transport_block_to_codeword_swap_flag (0)
					    (cc->p_eNB == 1) ? 0 : 1,	// transmission_scheme
					    1,	// number of layers
					    1,	// number of subbands
					    //0,                         // codebook index 
					    1,	// ue_category_capacity
					    4,	// pa: 0 dB
					    0,	// delta_power_offset_index
					    0,	// ngap
					    1,	// NPRB = 3 like in DCI
					    (cc->p_eNB == 1) ? 1 : 2,	// transmission mode
					    1,	// num_bf_prb_per_subband
					    1);	// num_bf_vector
		} else
		    LOG_D(MAC,
			  "msg4 retransmission for rnti %x (round %d) fsf %d/%d CCE allocation failed!\n",
			  ra->rnti, round, frameP, subframeP);


		// Program PUCCH1a for ACK/NAK


		fill_nfapi_uci_acknak(module_idP, CC_idP,
				      ra->rnti,
				      (frameP * 10) + subframeP,
				      dl_config_pdu->dci_dl_pdu.
				      dci_dl_pdu_rel8.cce_idx);

		// prepare frame for retransmission
		if (ra->Msg4_subframe > 1)
		    ra->Msg4_frame++;
		ra->Msg4_frame &= 1023;
		ra->Msg4_subframe = (ra->Msg4_subframe + 8) % 10;

		LOG_W(MAC,
		      "[eNB %d][RAPROC] CC_id %d Frame %d, subframeP %d: Msg4 not acknowledged, adding ue specific dci (rnti %x) for RA (Msg4 Retransmission round %d in %d.%d)\n",
		      module_idP, CC_idP, frameP, subframeP, ra->rnti,
		      round, ra->Msg4_frame, ra->Msg4_subframe);

	    }			// Msg4 frame/subframe
	}			// regular LTE case
    } else {
	LOG_D(MAC,
	      "[eNB %d][RAPROC] CC_id %d Frame %d, subframeP %d : Msg4 acknowledged\n",
	      module_idP, CC_idP, frameP, subframeP);
	ra->state = IDLE;
	UE_id = find_UE_id(module_idP, ra->rnti);
	DevAssert(UE_id != -1);
	mac->UE_list.UE_template[UE_PCCID(module_idP, UE_id)][UE_id].
	    configured = TRUE;
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    }
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}
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void
schedule_RA(module_id_t module_idP, frame_t frameP, sub_frame_t subframeP)
{
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    int CC_id;
    eNB_MAC_INST *mac = RC.mac[module_idP];
    COMMON_channels_t *cc = mac->common_channels;
    RA_t *ra;
    uint8_t i;
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    start_meas(&mac->schedule_ra);
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    for (CC_id = 0; CC_id < MAX_NUM_CCs; CC_id++) {
	// skip UL component carriers if TDD
	if (is_UL_sf(&cc[CC_id], subframeP) == 1)
	    continue;
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	for (i = 0; i < NB_RA_PROC_MAX; i++) {
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	    ra = (RA_t *) & cc[CC_id].ra[i];
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	    if (ra->state == MSG2)
		generate_Msg2(module_idP, CC_id, frameP, subframeP, ra);
	    else if (ra->state == MSG4)
		generate_Msg4(module_idP, CC_id, frameP, subframeP, ra);
	    else if (ra->state == WAITMSG4ACK)
		check_Msg4_retransmission(module_idP, CC_id, frameP,
					  subframeP, ra);
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	}			// for i=0 .. N_RA_PROC-1 
    }				// CC_id
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    stop_meas(&mac->schedule_ra);
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}
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// handles the event of MSG1 reception
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void
initiate_ra_proc(module_id_t module_idP,
		 int CC_id,
		 frame_t frameP,
		 sub_frame_t subframeP,
		 uint16_t preamble_index,
		 int16_t timing_offset, uint16_t ra_rnti
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#ifdef Rel14
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		 , uint8_t rach_resource_type
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#endif
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    )
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{

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    uint8_t i;
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    COMMON_channels_t *cc = &RC.mac[module_idP]->common_channels[CC_id];
    RA_t *ra = &cc->ra[0];
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    struct PRACH_ConfigSIB_v1310 *ext4_prach = NULL;
    PRACH_ParametersListCE_r13_t *prach_ParametersListCE_r13 = NULL;
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    if (cc->radioResourceConfigCommon_BR
	&& cc->radioResourceConfigCommon_BR->ext4) {
	ext4_prach =
	    cc->radioResourceConfigCommon_BR->ext4->
	    prach_ConfigCommon_v1310;
	prach_ParametersListCE_r13 =
	    &ext4_prach->prach_ParametersListCE_r13;
    }
    LOG_I(MAC,
	  "[eNB %d][RAPROC] CC_id %d Frame %d, Subframe %d  Initiating RA procedure for preamble index %d\n",
	  module_idP, CC_id, frameP, subframeP, preamble_index);
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#ifdef Rel14
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    LOG_D(MAC,
	  "[eNB %d][RAPROC] CC_id %d Frame %d, Subframe %d  PRACH resource type %d\n",
	  module_idP, CC_id, frameP, subframeP, rach_resource_type);
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#endif
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    if (prach_ParametersListCE_r13 &&
	prach_ParametersListCE_r13->list.count < rach_resource_type) {
	LOG_E(MAC,
	      "[eNB %d][RAPROC] CC_id %d Received impossible PRACH resource type %d, only %d CE levels configured\n",
	      module_idP, CC_id, rach_resource_type,
	      (int) prach_ParametersListCE_r13->list.count);
	return;
    }

    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME
	(VCD_SIGNAL_DUMPER_FUNCTIONS_INITIATE_RA_PROC, 1);
    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME
	(VCD_SIGNAL_DUMPER_FUNCTIONS_INITIATE_RA_PROC, 0);

    for (i = 0; i < NB_RA_PROC_MAX; i++) {
	if (ra[i].state == IDLE) {
	    int loop = 0;
	    LOG_D(MAC, "Frame %d, Subframe %d: Activating RA process %d\n",
		  frameP, subframeP, i);
	    ra[i].state = MSG2;
	    ra[i].timing_offset = timing_offset;
	    ra[i].preamble_subframe = subframeP;
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#ifdef Rel14
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	    ra[i].rach_resource_type = rach_resource_type;
	    ra[i].msg2_mpdcch_repetition_cnt = 0;
	    ra[i].msg4_mpdcch_repetition_cnt = 0;
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#endif
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	    ra[i].Msg2_frame = frameP + ((subframeP > 5) ? 1 : 0);
	    ra[i].Msg2_subframe = (subframeP + 4) % 10;
	    /* TODO: find better procedure to allocate RNTI */
	    do {
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#if defined(USRP_REC_PLAY) // deterministic rnti in usrp record/playback mode
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	        static int drnti[NUMBER_OF_UE_MAX] = { 0xbda7, 0x71da, 0x9c40, 0xc350, 0x2710, 0x4e20, 0x7530, 0x1388, 0x3a98, 0x61a8, 0x88b8, 0xafc8, 0xd6d8, 0x1b58, 0x4268, 0x6978 };
	        int j = 0;
		int nb_ue = 0;
		for (j = 0; j < NUMBER_OF_UE_MAX; j++) {
		    if (UE_RNTI(module_idP, j) > 0) {
		        nb_ue++;
		    } else {
		        break;
		    }
		}
		if (nb_ue >= NUMBER_OF_UE_MAX) {
		    printf("No more free RNTI available, increase NUMBER_OF_UE_MAX\n");
		    abort();
		}
		ra[i].rnti = drnti[nb_ue];
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#else	
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		ra[i].rnti = taus();
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#endif
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		loop++;
	    }
	    while (loop != 100 &&
		   /* TODO: this is not correct, the rnti may be in use without
		    * being in the MAC yet. To be refined.
		    */
		   !(find_UE_id(module_idP, ra[i].rnti) == -1 &&
		     /* 1024 and 60000 arbirarily chosen, not coming from standard */
		     ra[i].rnti >= 1024 && ra[i].rnti < 60000));
	    if (loop == 100) {
		printf("%s:%d:%s: FATAL ERROR! contact the authors\n",
		       __FILE__, __LINE__, __FUNCTION__);
		abort();
	    }
	    ra[i].RA_rnti = ra_rnti;
	    ra[i].preamble_index = preamble_index;
	    LOG_D(MAC,
		  "[eNB %d][RAPROC] CC_id %d Frame %d Activating RAR generation in Frame %d, subframe %d for process %d, rnti %x, state %d\n",
		  module_idP, CC_id, frameP, ra[i].Msg2_frame,
		  ra[i].Msg2_subframe, i, ra[i].rnti, ra[i].state);

	    return;
	}
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    }
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    LOG_E(MAC,
	  "[eNB %d][RAPROC] FAILURE: CC_id %d Frame %d Initiating RA procedure for preamble index %d\n",
	  module_idP, CC_id, frameP, preamble_index);
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}
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void
cancel_ra_proc(module_id_t module_idP, int CC_id, frame_t frameP,
	       rnti_t rnti)
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{
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    unsigned char i;
    RA_t *ra = (RA_t *) & RC.mac[module_idP]->common_channels[CC_id].ra[0];

    MSC_LOG_EVENT(MSC_PHY_ENB, "RA Cancelling procedure ue %" PRIx16 " ",
		  rnti);
    LOG_D(MAC,
	  "[eNB %d][RAPROC] CC_id %d Frame %d Cancelling RA procedure for UE rnti %x\n",
	  module_idP, CC_id, frameP, rnti);

    for (i = 0; i < NB_RA_PROC_MAX; i++) {
	if (rnti == ra[i].rnti) {
	  ra[i].state = IDLE;
	  ra[i].timing_offset = 0;
	  ra[i].RRC_timer = 20;
	  ra[i].rnti = 0;
	  ra[i].msg3_round = 0;
	}
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    }
}