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

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	}			//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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	    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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    }
}