ue_procedures.c 104 KB
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/*
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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 the OAI Public License, Version 1.1
 * (the "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
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 *
 *      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 ue_procedures.c
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 * \brief procedures related to UE
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 * \author  Navid Nikaein and Raymond Knopp
 * \date 2010 - 2014
 * \version 1
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 * \email: navid.nikaein@eurecom.fr
 * @ingroup _mac
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 */
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#ifdef EXMIMO
#include <pthread.h>
#endif

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#include "extern.h"
#include "defs.h"
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#include "proto.h"
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#ifdef PHY_EMUL
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#include "SIMULATION/PHY_EMULATION/impl_defs.h"
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#else
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#include "SCHED/defs.h"
#include "PHY/impl_defs_top.h"
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#endif
#include "PHY_INTERFACE/extern.h"
#include "COMMON/mac_rrc_primitives.h"
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#include "RRC/L2_INTERFACE/openair_rrc_L2_interface.h"
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#include "RRC/LITE/extern.h"
#include "UTIL/LOG/log.h"
#include "UTIL/LOG/vcd_signal_dumper.h"
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#include "UTIL/OPT/opt.h"
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#include "OCG.h"
#include "OCG_extern.h"
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#include "openair2/PHY_INTERFACE/phy_stub_UE.h"
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#ifdef PHY_EMUL
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#include "SIMULATION/simulation_defs.h"
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#endif
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#include "pdcp.h"
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#if defined(ENABLE_ITTI)
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#include "intertask_interface.h"
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#endif

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#include "assertions.h"

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#include "SIMULATION/TOOLS/defs.h"	// for taus
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#define DEBUG_HEADER_PARSING 1
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#define ENABLE_MAC_PAYLOAD_DEBUG 1
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extern uint8_t usim_test;

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extern UL_IND_t *UL_INFO;

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extern uint8_t  nfapi_mode;

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/*
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 *
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#ifndef USER_MODE
#define msg debug_msg
#endif
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 */
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mapping BSR_names[] = {
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    {"NONE", 0},
    {"SHORT BSR", 1},
    {"TRUNCATED BSR", 2},
    {"LONG BSR", 3},
    {"PADDING BSR", 4},
    {NULL, -1}
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};


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void ue_init_mac(module_id_t module_idP)
{
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    int i;
    // default values as deined in 36.331 sec 9.2.2
    LOG_I(MAC, "[UE%d] Applying default macMainConfig\n", module_idP);
    //UE_mac_inst[module_idP].scheduling_info.macConfig=NULL;
    UE_mac_inst[module_idP].scheduling_info.retxBSR_Timer =
	RetxBSR_Timer_r12_sf10240;
    UE_mac_inst[module_idP].scheduling_info.periodicBSR_Timer =
	PeriodicBSR_Timer_r12_infinity;
    UE_mac_inst[module_idP].scheduling_info.periodicPHR_Timer =
	MAC_MainConfig__phr_Config__setup__periodicPHR_Timer_sf20;
    UE_mac_inst[module_idP].scheduling_info.prohibitPHR_Timer =
	MAC_MainConfig__phr_Config__setup__prohibitPHR_Timer_sf20;
    UE_mac_inst[module_idP].scheduling_info.PathlossChange_db =
	MAC_MainConfig__phr_Config__setup__dl_PathlossChange_dB1;
    UE_mac_inst[module_idP].PHR_state =
	MAC_MainConfig__phr_Config_PR_setup;
    UE_mac_inst[module_idP].scheduling_info.SR_COUNTER = 0;
    UE_mac_inst[module_idP].scheduling_info.sr_ProhibitTimer = 0;
    UE_mac_inst[module_idP].scheduling_info.sr_ProhibitTimer_Running = 0;
    UE_mac_inst[module_idP].scheduling_info.maxHARQ_Tx =
	MAC_MainConfig__ul_SCH_Config__maxHARQ_Tx_n5;
    UE_mac_inst[module_idP].scheduling_info.ttiBundling = 0;
    UE_mac_inst[module_idP].scheduling_info.extendedBSR_Sizes_r10 = 0;
    UE_mac_inst[module_idP].scheduling_info.extendedPHR_r10 = 0;
    UE_mac_inst[module_idP].scheduling_info.drx_config = NULL;
    UE_mac_inst[module_idP].scheduling_info.phr_config = NULL;
    // set init value 0xFFFF, make sure periodic timer and retx time counters are NOT active, after bsr transmission set the value configured by the NW.
    UE_mac_inst[module_idP].scheduling_info.periodicBSR_SF =
	MAC_UE_BSR_TIMER_NOT_RUNNING;
    UE_mac_inst[module_idP].scheduling_info.retxBSR_SF =
	MAC_UE_BSR_TIMER_NOT_RUNNING;
    UE_mac_inst[module_idP].BSR_reporting_active = BSR_TRIGGER_NONE;

    UE_mac_inst[module_idP].scheduling_info.periodicPHR_SF =
	get_sf_perioidicPHR_Timer(UE_mac_inst[module_idP].
				  scheduling_info.periodicPHR_Timer);
    UE_mac_inst[module_idP].scheduling_info.prohibitPHR_SF =
	get_sf_prohibitPHR_Timer(UE_mac_inst[module_idP].
				 scheduling_info.prohibitPHR_Timer);
    UE_mac_inst[module_idP].scheduling_info.PathlossChange_db =
	get_db_dl_PathlossChange(UE_mac_inst[module_idP].
				 scheduling_info.PathlossChange);
    UE_mac_inst[module_idP].PHR_reporting_active = 0;

    for (i = 0; i < MAX_NUM_LCID; i++) {
	LOG_D(MAC,
	      "[UE%d] Applying default logical channel config for LCGID %d\n",
	      module_idP, i);
	UE_mac_inst[module_idP].scheduling_info.Bj[i] = -1;
	UE_mac_inst[module_idP].scheduling_info.bucket_size[i] = -1;

	if (i < DTCH) {		// initilize all control channels lcgid to 0
	    UE_mac_inst[module_idP].scheduling_info.LCGID[i] = 0;
	} else {		// initialize all the data channels lcgid to 1
	    UE_mac_inst[module_idP].scheduling_info.LCGID[i] = 1;
	}

	UE_mac_inst[module_idP].scheduling_info.LCID_status[i] =
	    LCID_EMPTY;
	UE_mac_inst[module_idP].scheduling_info.LCID_buffer_remain[i] = 0;
    }
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  if(nfapi_mode == 3) {
	  pthread_mutex_init(&UE_mac_inst[module_idP].UL_INFO_mutex,NULL);
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	  UE_mac_inst[module_idP].UE_mode[0] = NOT_SYNCHED; //PRACH;
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	  UE_mac_inst[module_idP].first_ULSCH_Tx =0;
	  UE_mac_inst[module_idP].dl_config_req = NULL;
	  UE_mac_inst[module_idP].ul_config_req = NULL;
	  UE_mac_inst[module_idP].hi_dci0_req = NULL;
	  UE_mac_inst[module_idP].tx_req = NULL;
  }

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#ifdef CBA
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    for (i = 0; i < NUM_MAX_CBA_GROUP; i++) {
	UE_mac_inst[module_idP].cba_last_access[i] =
	    round(uniform_rngen(1, 30));
    }
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#endif
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}

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

    while (not_done == 1) {

	if (((SCH_SUBHEADER_FIXED *) mac_header_ptr)->E == 0) {
	    //      printf("E=0\n");
	    not_done = 0;
	}

	lcid = ((SCH_SUBHEADER_FIXED *) mac_header_ptr)->LCID;

	if (lcid < UE_CONT_RES) {
	    //printf("[MAC][UE] header %x.%x.%x\n",mac_header_ptr[0],mac_header_ptr[1],mac_header_ptr[2]);
	    if (not_done == 0) {	// last MAC SDU, length is implicit
		mac_header_ptr++;
		length =
		    tb_length - (mac_header_ptr - mac_header) - ce_len;

		for (num_sdu_cnt = 0; num_sdu_cnt < num_sdus;
		     num_sdu_cnt++) {
		    length -= rx_lengths[num_sdu_cnt];
		}
	    } else {
		if (((SCH_SUBHEADER_LONG *) mac_header_ptr)->F == 1) {
		    length =
			((((SCH_SUBHEADER_LONG *) mac_header_ptr)->
			  L_MSB & 0x7f)
			 << 8) | (((SCH_SUBHEADER_LONG *) mac_header_ptr)->
				  L_LSB & 0xff);
		    mac_header_ptr += 3;
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#ifdef DEBUG_HEADER_PARSING
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		    LOG_D(MAC, "[UE] parse long sdu, size %x \n", length);
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#endif
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		} else {	//if (((SCH_SUBHEADER_SHORT *)mac_header_ptr)->F == 0) {
		    length = ((SCH_SUBHEADER_SHORT *) mac_header_ptr)->L;
		    mac_header_ptr += 2;
		}
	    }
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#ifdef DEBUG_HEADER_PARSING
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	    LOG_D(MAC, "[UE] sdu %d lcid %d length %d (offset now %ld)\n",
		  num_sdus, lcid, length, mac_header_ptr - mac_header);
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#endif
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	    rx_lcids[num_sdus] = lcid;
	    rx_lengths[num_sdus] = length;
	    num_sdus++;
	} else {		// This is a control element subheader
	    if (lcid == SHORT_PADDING) {
		num_padding++;
		mac_header_ptr++;
	    } else {
		rx_ces[num_ces] = lcid;
		num_ces++;
		mac_header_ptr++;

		if (lcid == TIMING_ADV_CMD) {
		    ce_len++;
		} else if (lcid == UE_CONT_RES) {

		    // FNA: check MAC Header is one of thoses defined in Annex B of 36.321
		    // Check there is only 1 Contention Resolution
		    if (num_cont_res) {
			LOG_W(MAC,
			      "[UE] Msg4 Wrong received format: More than 1 Contention Resolution\n");
			// exit parsing
			return NULL;

		    }
		    // UE_CONT_RES shall never be the last subheader unless this is the only MAC subheader
		    if ((not_done == 0)
			&& ((num_sdus) || (num_ces > 1) || (num_padding))) {
			LOG_W(MAC,
			      "[UE] Msg4 Wrong received format: Contention Resolution after num_ces=%d num_sdus=%d num_padding=%d\n",
			      num_ces, num_sdus, num_padding);
			// exit parsing
			return NULL;
		    }
		    num_cont_res++;
		    ce_len += 6;
		}
	    }
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#ifdef DEBUG_HEADER_PARSING
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	    LOG_D(MAC, "[UE] ce %d lcid %d (offset now %ld)\n", num_ces,
		  lcid, mac_header_ptr - mac_header);
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#endif
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	}
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    }

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

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uint32_t
ue_get_SR(module_id_t module_idP, int CC_id, frame_t frameP,
	  uint8_t eNB_id, uint16_t rnti, sub_frame_t subframe)
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{
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    // no UL-SCH resources available for this tti && UE has a valid PUCCH resources for SR configuration for this tti
    //  int MGL=6;// measurement gap length in ms
    int MGRP = 0;		// measurement gap repetition period in ms
    int gapOffset = -1;
    int T = 0;

    DevCheck(module_idP < (int) NB_UE_INST, module_idP, NB_UE_INST, 0);

    AssertFatal(CC_id == 0,
		"Transmission on secondary CCs is not supported yet\n");

    // determin the measurement gap
    if (UE_mac_inst[module_idP].measGapConfig != NULL) {
	if (UE_mac_inst[module_idP].measGapConfig->choice.setup.
	    gapOffset.present == MeasGapConfig__setup__gapOffset_PR_gp0) {
	    MGRP = 40;
	    gapOffset =
		UE_mac_inst[module_idP].measGapConfig->choice.
		setup.gapOffset.choice.gp0;
	} else if (UE_mac_inst[module_idP].measGapConfig->choice.
		   setup.gapOffset.present ==
		   MeasGapConfig__setup__gapOffset_PR_gp1) {
	    MGRP = 80;
	    gapOffset =
		UE_mac_inst[module_idP].measGapConfig->choice.
		setup.gapOffset.choice.gp1;
	} else {
	    LOG_W(MAC, "Measurement GAP offset is unknown\n");
	}

	T = MGRP / 10;
	DevAssert(T != 0);

	//check the measurement gap and sr prohibit timer
	if ((subframe == gapOffset % 10)
	    && ((frameP % T) == (floor(gapOffset / 10)))
	    && (UE_mac_inst[module_idP].
		scheduling_info.sr_ProhibitTimer_Running == 0)) {
	    UE_mac_inst[module_idP].scheduling_info.SR_pending = 1;
	    return (0);
	}
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    }

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    if ((UE_mac_inst[module_idP].physicalConfigDedicated != NULL) &&
	(UE_mac_inst[module_idP].scheduling_info.SR_pending == 1) &&
	(UE_mac_inst[module_idP].scheduling_info.SR_COUNTER <
	 (1 <<
	  (2 +
	   UE_mac_inst[module_idP].
	   physicalConfigDedicated->schedulingRequestConfig->choice.setup.
	   dsr_TransMax)))) {
	LOG_D(MAC,
	      "[UE %d][SR %x] Frame %d subframe %d PHY asks for SR (SR_COUNTER/dsr_TransMax %d/%d), SR_pending %d\n",
	      module_idP, rnti, frameP, subframe,
	      UE_mac_inst[module_idP].scheduling_info.SR_COUNTER,
	      (1 <<
	       (2 +
		UE_mac_inst[module_idP].
		physicalConfigDedicated->schedulingRequestConfig->choice.
		setup.dsr_TransMax)),
	      UE_mac_inst[module_idP].scheduling_info.SR_pending);

	UE_mac_inst[module_idP].scheduling_info.SR_COUNTER++;

	// start the sr-prohibittimer : rel 9 and above
	if (UE_mac_inst[module_idP].scheduling_info.sr_ProhibitTimer > 0) {	// timer configured
	    UE_mac_inst[module_idP].scheduling_info.sr_ProhibitTimer--;
	    UE_mac_inst[module_idP].scheduling_info.
		sr_ProhibitTimer_Running = 1;
	} else {
	    UE_mac_inst[module_idP].scheduling_info.
		sr_ProhibitTimer_Running = 0;
	}

	LOG_D(MAC,
	      "[UE %d][SR %x] Frame %d subframe %d send SR indication (SR_COUNTER/dsr_TransMax %d/%d), SR_pending %d\n",
	      module_idP, rnti, frameP, subframe,
	      UE_mac_inst[module_idP].scheduling_info.SR_COUNTER,
	      (1 <<
	       (2 +
		UE_mac_inst[module_idP].
		physicalConfigDedicated->schedulingRequestConfig->choice.
		setup.dsr_TransMax)),
	      UE_mac_inst[module_idP].scheduling_info.SR_pending);

	//UE_mac_inst[module_idP].ul_active =1;
	return (1);		//instruct phy to signal SR
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    } else {
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	// notify RRC to relase PUCCH/SRS
	// clear any configured dl/ul
	// initiate RA
	if (UE_mac_inst[module_idP].scheduling_info.SR_pending) {
	    // release all pucch resource
	    UE_mac_inst[module_idP].physicalConfigDedicated = NULL;
	    UE_mac_inst[module_idP].ul_active = 0;
	    UE_mac_inst[module_idP].BSR_reporting_active =
		BSR_TRIGGER_NONE;

	    LOG_I(MAC, "[UE %d] Release all SRs \n", module_idP);
	}
	UE_mac_inst[module_idP].scheduling_info.SR_pending = 0;
	UE_mac_inst[module_idP].scheduling_info.SR_COUNTER = 0;
	return (0);
    }
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}

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//------------------------------------------------------------------------------
void
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ue_send_sdu(module_id_t module_idP,
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	    uint8_t CC_id,
	    frame_t frameP,
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	    sub_frame_t subframeP,
	    uint8_t * sdu, uint16_t sdu_len, uint8_t eNB_index)
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//------------------------------------------------------------------------------
{
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    unsigned char rx_ces[MAX_NUM_CE], num_ce, num_sdu, i, *payload_ptr;
    unsigned char rx_lcids[NB_RB_MAX];
    unsigned short rx_lengths[NB_RB_MAX];
    unsigned char *tx_sdu;
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#if UE_TIMING_TRACE
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    start_meas(&UE_mac_inst[module_idP].rx_dlsch_sdu);
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#endif
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    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME
	(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_SEND_SDU, VCD_FUNCTION_IN);
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  //LOG_D(MAC,"sdu: %x.%x.%x\n",sdu[0],sdu[1],sdu[2]);
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    if (opt_enabled) {
	trace_pdu(1, sdu, sdu_len, module_idP, 3,
		  UE_mac_inst[module_idP].crnti, frameP, subframeP, 0, 0);
	LOG_D(OPT,
	      "[UE %d][DLSCH] Frame %d trace pdu for rnti %x  with size %d\n",
	      module_idP, frameP, UE_mac_inst[module_idP].crnti, sdu_len);
    }
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    payload_ptr =
	parse_header(sdu, &num_ce, &num_sdu, rx_ces, rx_lcids, rx_lengths,
		     sdu_len);
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#ifdef DEBUG_HEADER_PARSING
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    LOG_D(MAC,
	  "[UE %d] ue_send_sdu : Frame %d eNB_index %d : num_ce %d num_sdu %d\n",
	  module_idP, frameP, eNB_index, num_ce, num_sdu);
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#endif

#if defined(ENABLE_MAC_PAYLOAD_DEBUG)
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    LOG_T(MAC, "[UE %d] First 32 bytes of DLSCH : \n", module_idP);
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    for (i = 0; i < 32; i++) {
	LOG_T(MAC, "%x.", sdu[i]);
    }
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    LOG_T(MAC, "\n");
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#endif

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    if (payload_ptr != NULL) {

	for (i = 0; i < num_ce; i++) {
	    //    printf("ce %d : %d\n",i,rx_ces[i]);
	    switch (rx_ces[i]) {
	    case UE_CONT_RES:

		LOG_I(MAC,
		      "[UE %d][RAPROC] Frame %d : received contention resolution msg: %x.%x.%x.%x.%x.%x, Terminating RA procedure\n",
		      module_idP, frameP, payload_ptr[0], payload_ptr[1],
		      payload_ptr[2], payload_ptr[3], payload_ptr[4],
		      payload_ptr[5]);

		if (UE_mac_inst[module_idP].RA_active == 1) {
		    LOG_I(MAC,
			  "[UE %d][RAPROC] Frame %d : Clearing RA_active flag\n",
			  module_idP, frameP);
		    UE_mac_inst[module_idP].RA_active = 0;
		    // check if RA procedure has finished completely (no contention)
		    tx_sdu = &UE_mac_inst[module_idP].CCCH_pdu.payload[3];

		    //Note: 3 assumes sizeof(SCH_SUBHEADER_SHORT) + PADDING CE, which is when UL-Grant has TBS >= 9 (64 bits)
		    // (other possibility is 1 for TBS=7 (SCH_SUBHEADER_FIXED), or 2 for TBS=8 (SCH_SUBHEADER_FIXED+PADDING or SCH_SUBHEADER_SHORT)
		    for (i = 0; i < 6; i++)
			if (tx_sdu[i] != payload_ptr[i]) {
			    LOG_E(MAC,
				  "[UE %d][RAPROC] Contention detected, RA failed\n",
				  module_idP);
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			    if(nfapi_mode == 3) { // Panos: phy_stub mode
			    	// Panos: Modification for phy_stub mode operation here. We only need to make sure that the ue_mode is back to
			    	// PRACH state.
			    	UE_mac_inst[module_idP].UE_mode[eNB_index] = PRACH;
			    	//ra_failed(module_idP,CC_id,eNB_index);UE_mac_inst[module_idP].RA_contention_resolution_timer_active = 0;
			    	}
			    else{
			    	ra_failed(module_idP, CC_id, eNB_index);
			    }
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			    UE_mac_inst
				[module_idP].
				RA_contention_resolution_timer_active = 0;
			    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME
				(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_SEND_SDU,
				 VCD_FUNCTION_OUT);
			    return;
			}

		    LOG_I(MAC,
			  "[UE %d][RAPROC] Frame %d : Clearing contention resolution timer\n",
			  module_idP, frameP);
		    UE_mac_inst
			[module_idP].
			RA_contention_resolution_timer_active = 0;
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		    if(nfapi_mode == 3) // phy_stub mode
		    	{
		    	//Panos: Modification for phy_stub mode operation here. We only need to change the ue_mode to PUSCH
		    	UE_mac_inst[module_idP].UE_mode[eNB_index] = PUSCH;
		    	}
		    else { // Full stack mode
		    	ra_succeeded(module_idP,CC_id,eNB_index);
		    }
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		}
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		payload_ptr += 6;
		break;
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	    case TIMING_ADV_CMD:
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#ifdef DEBUG_HEADER_PARSING
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		LOG_D(MAC, "[UE] CE %d : UE Timing Advance : %d\n", i,
		      payload_ptr[0]);
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#endif
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	  // Panos: Eliminate call to process_timing_advance for the phy_stub UE operation mode. Is this correct?
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      if (nfapi_mode!=3)
      {
    	  process_timing_advance(module_idP,CC_id,payload_ptr[0]);
      }
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      payload_ptr++;
      break;

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	    case DRX_CMD:
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#ifdef DEBUG_HEADER_PARSING
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		LOG_D(MAC, "[UE] CE %d : UE DRX :", i);
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#endif
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		payload_ptr++;
		break;
	    }
	}
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	for (i = 0; i < num_sdu; i++) {
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#ifdef DEBUG_HEADER_PARSING
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	    LOG_D(MAC, "[UE] SDU %d : LCID %d, length %d\n", i,
		  rx_lcids[i], rx_lengths[i]);
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#endif
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	    if (rx_lcids[i] == CCCH) {
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		LOG_D(MAC,
		      "[UE %d] rnti %x Frame %d : DLSCH -> DL-CCCH, RRC message (eNB %d, %d bytes)\n",
		      module_idP, UE_mac_inst[module_idP].crnti, frameP,
		      eNB_index, rx_lengths[i]);
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#if defined(ENABLE_MAC_PAYLOAD_DEBUG)
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		int j;
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		for (j = 0; j < rx_lengths[i]; j++) {
		    LOG_T(MAC, "%x.", (uint8_t) payload_ptr[j]);
		}
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		LOG_T(MAC, "\n");
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#endif
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		mac_rrc_data_ind_ue(module_idP,
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				 CC_id,
				 frameP, subframeP,
				 UE_mac_inst[module_idP].crnti,
				 CCCH,
				 (uint8_t *) payload_ptr,
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				 rx_lengths[i], eNB_index, 0);
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	    } else if ((rx_lcids[i] == DCCH) || (rx_lcids[i] == DCCH1)) {
		LOG_D(MAC,
		      "[UE %d] Frame %d : DLSCH -> DL-DCCH%d, RRC message (eNB %d, %d bytes)\n",
		      module_idP, frameP, rx_lcids[i], eNB_index,
		      rx_lengths[i]);
		mac_rlc_data_ind(module_idP, UE_mac_inst[module_idP].crnti,
				 eNB_index, frameP, ENB_FLAG_NO,
				 MBMS_FLAG_NO, rx_lcids[i],
				 (char *) payload_ptr, rx_lengths[i], 1,
				 NULL);

	    } else if ((rx_lcids[i] < NB_RB_MAX) && (rx_lcids[i] > DCCH1)) {

		LOG_D(MAC,
		      "[UE %d] Frame %d : DLSCH -> DL-DTCH%d (eNB %d, %d bytes)\n",
		      module_idP, frameP, rx_lcids[i], eNB_index,
		      rx_lengths[i]);
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#if defined(ENABLE_MAC_PAYLOAD_DEBUG)
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		int j;
		for (j = 0; j < rx_lengths[i]; j++)
		    LOG_T(MAC, "%x.", (unsigned char) payload_ptr[j]);
		LOG_T(MAC, "\n");
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#endif
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		mac_rlc_data_ind(module_idP,
				 UE_mac_inst[module_idP].crnti,
				 eNB_index,
				 frameP,
				 ENB_FLAG_NO,
				 MBMS_FLAG_NO,
				 rx_lcids[i],
				 (char *) payload_ptr, rx_lengths[i], 1,
				 NULL);
	    } else {
		LOG_E(MAC, "[UE %d] Frame %d : unknown LCID %d (eNB %d)\n",
		      module_idP, frameP, rx_lcids[i], eNB_index);
	    }
	    payload_ptr += rx_lengths[i];
	}
    }				// end if (payload_ptr != NULL)

    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME
	(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_SEND_SDU, VCD_FUNCTION_OUT);
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#if UE_TIMING_TRACE
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    stop_meas(&UE_mac_inst[module_idP].rx_dlsch_sdu);
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#endif
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}

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void
ue_decode_si(module_id_t module_idP, int CC_id, frame_t frameP,
	     uint8_t eNB_index, void *pdu, uint16_t len)
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{
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#if UE_TIMING_TRACE
    start_meas(&UE_mac_inst[module_idP].rx_si);
#endif
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    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME
	(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_DECODE_SI, VCD_FUNCTION_IN);

    LOG_D(MAC, "[UE %d] Frame %d Sending SI to RRC (LCID Id %d,len %d)\n",
	  module_idP, frameP, BCCH, len);

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    mac_rrc_data_ind_ue(module_idP, CC_id, frameP, 0,	// unknown subframe
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		     SI_RNTI,
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		     BCCH, (uint8_t *) pdu, len, eNB_index,
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		     0);
    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME
	(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_DECODE_SI, VCD_FUNCTION_OUT);
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#if UE_TIMING_TRACE
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    stop_meas(&UE_mac_inst[module_idP].rx_si);
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#endif
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    if (opt_enabled == 1) {
	trace_pdu(0,
		  (uint8_t *) pdu,
		  len,
		  module_idP,
		  4,
		  0xffff,
		  UE_mac_inst[module_idP].rxFrame,
		  UE_mac_inst[module_idP].rxSubframe, 0, 0);
	LOG_D(OPT,
	      "[UE %d][BCH] Frame %d trace pdu for CC_id %d rnti %x with size %d\n",
	      module_idP, frameP, CC_id, 0xffff, len);
    }
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}

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void
ue_decode_p(module_id_t module_idP, int CC_id, frame_t frameP,
	    uint8_t eNB_index, void *pdu, uint16_t len)
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{
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#if UE_TIMING_TRACE
    start_meas(&UE_mac_inst[module_idP].rx_p);
#endif
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    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME
	(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_DECODE_PCCH, VCD_FUNCTION_IN);

    LOG_D(MAC,
	  "[UE %d] Frame %d Sending Paging message to RRC (LCID Id %d,len %d)\n",
	  module_idP, frameP, PCCH, len);

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    mac_rrc_data_ind_ue(module_idP, CC_id, frameP, 0,	// unknown subframe
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		     P_RNTI,
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		     PCCH, (uint8_t *) pdu, len, eNB_index,
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		     0);
    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME
	(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_DECODE_PCCH, VCD_FUNCTION_OUT);
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#if UE_TIMING_TRACE
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    stop_meas(&UE_mac_inst[module_idP].rx_p);
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#endif
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    if (opt_enabled == 1) {
	trace_pdu(0,
		  (uint8_t *) pdu,
		  len,
		  module_idP,
		  4,
		  P_RNTI,
		  UE_mac_inst[module_idP].rxFrame,
		  UE_mac_inst[module_idP].rxSubframe, 0, 0);
	LOG_D(OPT,
	      "[UE %d][BCH] Frame %d trace pdu for CC_id %d rnti %x with size %d\n",
	      module_idP, frameP, CC_id, P_RNTI, len);
    }
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}

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#if defined(Rel10) || defined(Rel14)
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unsigned char *parse_mch_header(unsigned char *mac_header,
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				unsigned char *num_sdu,
				unsigned char *rx_lcids,
				unsigned short *rx_lengths,
				unsigned short tb_length)
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{
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    unsigned char not_done = 1, num_sdus = 0, lcid, i;
    unsigned char *mac_header_ptr = mac_header;
    unsigned short length;

    while (not_done == 1) {
	if (((SCH_SUBHEADER_FIXED *) mac_header_ptr)->E == 0) {
	    not_done = 0;
	}

	lcid = ((SCH_SUBHEADER_FIXED *) mac_header_ptr)->LCID;

	if (lcid < SHORT_PADDING) {	// subheader for MSI, MCCH or MTCH
	    if (not_done == 0) {	// last MAC SDU, length is implicit
		mac_header_ptr++;
		length = tb_length - (mac_header_ptr - mac_header);

		for (i = 0; i < num_sdus; i++) {
		    length -= rx_lengths[i];
		}
	    } else {		// not the last MAC SDU
		if (((SCH_SUBHEADER_LONG *) mac_header_ptr)->F == 1) {	// subheader has length of 3octets
		    //    length = ((SCH_SUBHEADER_LONG *)mac_header_ptr)->L;
		    length =
			((((SCH_SUBHEADER_LONG *) mac_header_ptr)->
			  L_MSB & 0x7f)
			 << 8) | (((SCH_SUBHEADER_LONG *) mac_header_ptr)->
				  L_LSB & 0xff);
		    mac_header_ptr += 3;
		} else {	// subheader has length of 2octets
		    length = ((SCH_SUBHEADER_SHORT *) mac_header_ptr)->L;
		    mac_header_ptr += 2;
		}
	    }

	    rx_lcids[num_sdus] = lcid;
	    rx_lengths[num_sdus] = length;
	    num_sdus++;
	} else {		// subheader for padding
	    //     if (lcid == SHORT_PADDING)
	    mac_header_ptr++;
	}
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    }

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    *num_sdu = num_sdus;
    return (mac_header_ptr);
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}

// this function is for sending mch_sdu from phy to mac
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void
ue_send_mch_sdu(module_id_t module_idP, uint8_t CC_id, frame_t frameP,
		uint8_t * sdu, uint16_t sdu_len, uint8_t eNB_index,
		uint8_t sync_area)
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{
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    unsigned char num_sdu, i, *payload_ptr;
    unsigned char rx_lcids[NB_RB_MAX];
    unsigned short rx_lengths[NB_RB_MAX];
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#if UE_TIMING_TRACE
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    start_meas(&UE_mac_inst[module_idP].rx_mch_sdu);
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#endif
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    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME
	(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_SEND_MCH_SDU, VCD_FUNCTION_IN);
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    LOG_D(MAC,
	  "[UE %d] Frame %d : process the mch PDU for sync area %d \n",
	  module_idP, frameP, sync_area);
    LOG_D(MAC, "[UE %d] sdu: %x.%x\n", module_idP, sdu[0], sdu[1]);
    LOG_D(MAC, "[UE %d] parse_mch_header, demultiplex\n", module_idP);

    payload_ptr =
	parse_mch_header(sdu, &num_sdu, rx_lcids, rx_lengths, sdu_len);
    LOG_D(MAC, "[UE %d] parse_mch_header, found %d sdus\n", module_idP,
	  num_sdu);

    for (i = 0; i < num_sdu; i++) {
	if (rx_lcids[i] == MCH_SCHDL_INFO) {
	    if (UE_mac_inst[module_idP].mcch_status == 1) {
		LOG_I(MAC,
		      "[UE %d] Frame %d : MCH->MSI for sync area %d (eNB %d, %d bytes)\n",
		      module_idP, frameP, sync_area, eNB_index,
		      rx_lengths[i]);
		// ??store necessary scheduling info to ue_mac_inst in order to
		// calculate exact position of interested service (for the complex case has >1 mtch)
		// set msi_status to 1
		UE_mac_inst[module_idP].msi_status = 1;
	    }
	} else if (rx_lcids[i] == MCCH_LCHANID) {
	    LOG_I(MAC,
		  "[UE %d] Frame %d : SDU %d MCH->MCCH for sync area %d (eNB %d, %d bytes)\n",
		  module_idP, frameP, i, sync_area, eNB_index,
		  rx_lengths[i]);
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	    mac_rrc_data_ind_ue(module_idP, CC_id, frameP, 0,	// unknown subframe
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			     M_RNTI,
			     MCCH,
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			     payload_ptr, rx_lengths[i], eNB_index,
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			     sync_area);
	} else if (rx_lcids[i] == MTCH) {
	    if (UE_mac_inst[module_idP].msi_status == 1) {
		LOG_I(MAC,
		      "[UE %d] Frame %d : MCH->MTCH for sync area %d (eNB %d, %d bytes)\n",
		      module_idP, frameP, sync_area, eNB_index,
		      rx_lengths[i]);

		mac_rlc_data_ind(module_idP, UE_mac_inst[module_idP].crnti, eNB_index, frameP, ENB_FLAG_NO, MBMS_FLAG_YES, MTCH,	/*+ (maxDRB + 3), */
				 (char *) payload_ptr, rx_lengths[i], 1,
				 NULL);

	    }
	} else {
	    LOG_W(MAC,
		  "[UE %d] Frame %d : unknown sdu %d rx_lcids[%d]=%d mcch status %d eNB %d \n",
		  module_idP, frameP, rx_lengths[i], i, rx_lcids[i],
		  UE_mac_inst[module_idP].mcch_status, eNB_index);
	}

	payload_ptr += rx_lengths[i];
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    }
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    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME
	(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_SEND_MCH_SDU, VCD_FUNCTION_OUT);
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#if UE_TIMING_TRACE
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    stop_meas(&UE_mac_inst[module_idP].rx_mch_sdu);
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#endif
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}

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void ue_send_sl_sdu(module_id_t module_idP,
		    uint8_t CC_id,
		    frame_t frameP,
		    sub_frame_t subframeP,
		    uint8_t* sdu,
		    uint16_t sdu_len,
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		    uint8_t eNB_index,
		    sl_discovery_flag_t sl_discovery_flag
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		    ) {

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  int rlc_sdu_len;
  char *rlc_sdu;
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  uint32_t destinationL2Id =0x00000000;
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  if (sl_discovery_flag == SL_DISCOVERY_FLAG_NO) {

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  // Notes: 1. no control elements are supported yet
  //        2. we exit with error if LCID != 3
  //        3. we exit with error if E=1 (more than one SDU/CE)
  // extract header
  SLSCH_SUBHEADER_24_Bit_DST_LONG *longh = (SLSCH_SUBHEADER_24_Bit_DST_LONG *)sdu;
  AssertFatal(longh->E==0,"E is non-zero\n");
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  AssertFatal(((longh->LCID==3)|(longh->LCID==10)),"LCID is %d (not 3 or 10)\n",longh->LCID);
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  //filter incoming packet based on destination address
  destinationL2Id = (longh->DST07<<16) | (longh->DST815 <<8) | (longh->DST1623);
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  LOG_I( MAC, "[DestinationL2Id:  0x%08x]  \n", destinationL2Id );
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  //in case of 1-n communication, verify that UE belongs to that group
  int i=0;
  for (i=0; i< MAX_NUM_DEST; i++)
     if (UE_mac_inst[module_idP].destinationList[i] == destinationL2Id) break;
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  //match the destinationL2Id with UE L2Id or groupL2ID
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  if (!((destinationL2Id == UE_mac_inst[module_idP].sourceL2Id) | (i < MAX_NUM_DEST))){
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     LOG_I( MAC, "[Destination Id is neither matched with Source Id nor with Group Id, drop the packet!!! \n");
     return;
  }


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  if (longh->F==1) {
    rlc_sdu_len = ((longh->L_MSB<<8)&0x7F00)|(longh->L_LSB&0xFF);
    rlc_sdu = sdu+sizeof(SLSCH_SUBHEADER_24_Bit_DST_LONG);
  }
  else {
    rlc_sdu_len = ((SLSCH_SUBHEADER_24_Bit_DST_SHORT *)sdu)->L;
    rlc_sdu = sdu+sizeof(SLSCH_SUBHEADER_24_Bit_DST_SHORT);
  }
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  mac_rlc_data_ind(
		   module_idP,
		   0x1234,
		   eNB_index,
		   frameP,
		   ENB_FLAG_NO,
		   MBMS_FLAG_NO,
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		   longh->LCID, //3/10
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		   rlc_sdu,
		   rlc_sdu_len,
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		   1,
		   NULL);
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  } else { //SL_DISCOVERY
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     uint16_t len = sdu_len;
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     LOG_I( MAC, "SL DISCOVERY \n");
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     // Panos: Ask TTN if we should be calling mac_rrc_data_ind_ue() instead of mac_rrc_data_ind() now!
     /*mac_rrc_data_ind(module_idP,
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                      CC_id,
                      frameP,subframeP,
                      UE_mac_inst[module_idP].crnti,
                      SL_DISCOVERY,
                      sdu, //(uint8_t*)&UE_mac_inst[Mod_id].SL_Discovery[0].Rx_buffer.Payload[0],
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                      len,
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                      ENB_FLAG_NO,
                      eNB_index,
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                      0);*/
     mac_rrc_data_ind_ue(module_idP,
                           CC_id,
                           frameP,subframeP,
                           UE_mac_inst[module_idP].crnti,
                           SL_DISCOVERY,
                           sdu, //(uint8_t*)&UE_mac_inst[Mod_id].SL_Discovery[0].Rx_buffer.Payload[0],
                           len,
                           eNB_index,
                           0);
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  }
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}


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int8_t ue_get_mbsfn_sf_alloction (module_id_t module_idP, uint8_t mbsfn_sync_area, unsigned char eNB_index)
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{
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    // currently there is one-to-one mapping between sf allocation pattern and sync area
    if (mbsfn_sync_area >= MAX_MBSFN_AREA) {
	LOG_W(MAC,
	      "[UE %" PRIu8 "] MBSFN synchronization area %" PRIu8
	      " out of range for eNB %" PRIu8 "\n", module_idP,
	      mbsfn_sync_area, eNB_index);
	return -1;
    } else if (UE_mac_inst[module_idP].
	       mbsfn_SubframeConfig[mbsfn_sync_area] != NULL) {
	return mbsfn_sync_area;
    } else {
	LOG_W(MAC,
	      "[UE %" PRIu8 "] MBSFN Subframe Config pattern %" PRIu8
	      " not found \n", module_idP, mbsfn_sync_area);
	return -1;
    }
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}
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int
ue_query_mch(module_id_t module_idP, uint8_t CC_id, uint32_t frameP,
	     uint32_t subframe, uint8_t eNB_index, uint8_t * sync_area,
	     uint8_t * mcch_active)
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{
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    int i = 0, j = 0, ii = 0, msi_pos = 0, mcch_mcs = -1;
    int mcch_flag = 0, mtch_flag = 0, msi_flag = 0;
    int mbsfn_period = 0;	// 1<<(UE_mac_inst[module_idP].mbsfn_SubframeConfig[0]->radioframeAllocationPeriod);
    int mcch_period = 0;	// 32<<(UE_mac_inst[module_idP].mbsfn_AreaInfo[0]->mcch_Config_r9.mcch_RepetitionPeriod_r9);
    int mch_scheduling_period = -1;
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    int frame_FDD = 1;
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#if UE_TIMING_TRACE
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    start_meas(&UE_mac_inst[module_idP].ue_query_mch);
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#endif
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    if (UE_mac_inst[module_idP].pmch_Config[0]) {
	mch_scheduling_period =
	    8 << (UE_mac_inst[module_idP].
		  pmch_Config[0]->mch_SchedulingPeriod_r9);
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    }
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    for (i = 0; i < UE_mac_inst[module_idP].num_active_mbsfn_area; i++) {
	// assume, that there is always a mapping
	if ((j =
	     ue_get_mbsfn_sf_alloction(module_idP, i, eNB_index)) == -1) {
	    return -1;		// continue;
	}

	ii = 0;
	msi_pos = 0;
	mbsfn_period =
	    1 << (UE_mac_inst[module_idP].
		  mbsfn_SubframeConfig[0]->radioframeAllocationPeriod);
	mcch_period =
	    32 << (UE_mac_inst[module_idP].
		   mbsfn_AreaInfo[0]->mcch_Config_r9.
		   mcch_RepetitionPeriod_r9);

	LOG_D(MAC,
	      "[UE %d] Frame %d subframe %d: Checking MBSFN Sync Area %d/%d with SF allocation %d/%d for MCCH and MTCH (mbsfn period %d, mcch period %d,mac sched period (%d,%ld))\n",
	      module_idP, frameP, subframe, i,
	      UE_mac_inst[module_idP].num_active_mbsfn_area, j,
	      UE_mac_inst[module_idP].num_sf_allocation_pattern,
	      mbsfn_period, mcch_period, mch_scheduling_period,
	      UE_mac_inst[module_idP].
	      mbsfn_SubframeConfig[j]->radioframeAllocationOffset);

	// get the real MCS value
	switch (UE_mac_inst[module_idP].mbsfn_AreaInfo[i]->
		mcch_Config_r9.signallingMCS_r9) {
	case 0:
	    mcch_mcs = 2;
	    break;

	case 1:
	    mcch_mcs = 7;
	    break;

	case 2:
	    mcch_mcs = 13;
	    break;

	case 3:
	    mcch_mcs = 19;
	    break;
	}

	if (frameP % mbsfn_period == UE_mac_inst[module_idP].mbsfn_SubframeConfig[j]->radioframeAllocationOffset) {	// MBSFN frameP
	    if (UE_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.present == MBSFN_SubframeConfig__subframeAllocation_PR_oneFrame) {	// one-frameP format

		if (UE_mac_inst[module_idP].pmch_Config[0]) {
		    //  Find the first subframe in this MCH to transmit MSI
		    if (frameP % mch_scheduling_period ==
			UE_mac_inst[module_idP].
			mbsfn_SubframeConfig
			[j]->radioframeAllocationOffset) {
			while (ii == 0) {
			    ii = UE_mac_inst[module_idP].
				mbsfn_SubframeConfig[j]->
				subframeAllocation.choice.
				oneFrame.buf[0] & (0x80 >> msi_pos);
			    msi_pos++;
			}
		    }
		}

		if (UE_mac_inst[module_idP].tdd_Config == NULL)
		    frame_FDD = 1;
		else
		    frame_FDD = 0;
		// Check if the subframe is for MSI, MCCH or MTCHs and Set the correspoding flag to 1
		switch (subframe) {
		case 1:
		    if (frame_FDD == 1) {
			if ((UE_mac_inst[module_idP].mbsfn_SubframeConfig
			     [j]->subframeAllocation.choice.oneFrame.
			     buf[0] & MBSFN_FDD_SF1) == MBSFN_FDD_SF1) {
			    if (msi_pos == 1) {
				msi_flag = 1;
			    }

			    if ((frameP % mcch_period ==
				 UE_mac_inst[module_idP].mbsfn_AreaInfo
				 [i]->mcch_Config_r9.mcch_Offset_r9)
				&&
				((UE_mac_inst[module_idP].mbsfn_AreaInfo
				  [i]->mcch_Config_r9.sf_AllocInfo_r9.
				  buf[0] & MBSFN_FDD_SF1) ==
				 MBSFN_FDD_SF1)) {
				mcch_flag = 1;
			    }

			    mtch_flag = 1;
			}
		    }
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		    break;

		case 2:
		    if (frame_FDD == 1) {
			if ((UE_mac_inst[module_idP].mbsfn_SubframeConfig
			     [j]->subframeAllocation.choice.oneFrame.
			     buf[0] & MBSFN_FDD_SF2) == MBSFN_FDD_SF2) {
			    if (msi_pos == 2) {
				msi_flag = 1;
			    }

			    if ((frameP % mcch_period ==
				 UE_mac_inst[module_idP].mbsfn_AreaInfo
				 [i]->mcch_Config_r9.mcch_Offset_r9)
				&&
				((UE_mac_inst[module_idP].mbsfn_AreaInfo
				  [i]->mcch_Config_r9.sf_AllocInfo_r9.
				  buf[0] & MBSFN_FDD_SF2) ==
				 MBSFN_FDD_SF2)) {
				mcch_flag = 1;
			    }

			    mtch_flag = 1;
			}
		    }
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		    break;

		case 3:
		    if (frame_FDD == 0) {	//TDD
			if ((UE_mac_inst[module_idP].mbsfn_SubframeConfig
			     [j]->subframeAllocation.choice.oneFrame.
			     buf[0] & MBSFN_TDD_SF3) == MBSFN_TDD_SF3) {
			    if (msi_pos == 1) {
				msi_flag = 1;
			    }

			    if ((frameP % mcch_period ==
				 UE_mac_inst[module_idP].mbsfn_AreaInfo
				 [i]->mcch_Config_r9.mcch_Offset_r9)
				&&
				((UE_mac_inst[module_idP].mbsfn_AreaInfo
				  [i]->mcch_Config_r9.sf_AllocInfo_r9.
				  buf[0] & MBSFN_TDD_SF3) ==
				 MBSFN_TDD_SF3)) {
				mcch_flag = 1;
			    }

			    mtch_flag = 1;
			}
		    } else {	// FDD
			if ((UE_mac_inst[module_idP].mbsfn_SubframeConfig
			     [j]->subframeAllocation.choice.oneFrame.
			     buf[0] & MBSFN_FDD_SF3) == MBSFN_FDD_SF3) {
			    if (msi_pos == 3) {
				msi_flag = 1;
			    }

			    if ((frameP % mcch_period ==
				 UE_mac_inst[module_idP].mbsfn_AreaInfo
				 [i]->mcch_Config_r9.mcch_Offset_r9)
				&&
				((UE_mac_inst[module_idP].mbsfn_AreaInfo
				  [i]->mcch_Config_r9.sf_AllocInfo_r9.
				  buf[0] & MBSFN_FDD_SF3) ==
				 MBSFN_FDD_SF3)) {
				mcch_flag = 1;
			    }

			    mtch_flag = 1;
			}
		    }
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		    break;

		case 4:
		    if (frame_FDD == 0) {
			if ((UE_mac_inst[module_idP].mbsfn_SubframeConfig
			     [j]->subframeAllocation.choice.oneFrame.
			     buf[0] & MBSFN_TDD_SF4) == MBSFN_TDD_SF4) {
			    if (msi_pos == 2) {
				msi_flag = 1;
			    }

			    if ((frameP % mcch_period ==
				 UE_mac_inst[module_idP].mbsfn_AreaInfo
				 [i]->mcch_Config_r9.mcch_Offset_r9)
				&&
				((UE_mac_inst[module_idP].mbsfn_AreaInfo
				  [i]->mcch_Config_r9.sf_AllocInfo_r9.
				  buf[0] & MBSFN_TDD_SF4) ==
				 MBSFN_TDD_SF4)) {
				mcch_flag = 1;
			    }

			    mtch_flag = 1;
			}
		    }
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		    break;

		case 6:
		    if (frame_FDD == 1) {
			if ((UE_mac_inst[module_idP].mbsfn_SubframeConfig
			     [j]->subframeAllocation.choice.oneFrame.
			     buf[0] & MBSFN_FDD_SF6) == MBSFN_FDD_SF6) {
			    if (msi_pos == 4) {
				msi_flag = 1;
			    }

			    if ((frameP % mcch_period ==
				 UE_mac_inst[module_idP].mbsfn_AreaInfo
				 [i]->mcch_Config_r9.mcch_Offset_r9)
				&&
				((UE_mac_inst[module_idP].mbsfn_AreaInfo
				  [i]->mcch_Config_r9.sf_AllocInfo_r9.
				  buf[0] & MBSFN_FDD_SF6) ==
				 MBSFN_FDD_SF6)) {
				mcch_flag = 1;
			    }

			    mtch_flag = 1;
			}
		    }
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		    break;

		case 7:
		    if (frame_FDD == 0) {	// TDD
			if ((UE_mac_inst[module_idP].mbsfn_SubframeConfig
			     [j]->subframeAllocation.choice.oneFrame.
			     buf[0] & MBSFN_TDD_SF7) == MBSFN_TDD_SF7) {
			    if (msi_pos == 3) {
				msi_flag = 1;
			    }

			    if ((frameP % mcch_period ==
				 UE_mac_inst[module_idP].mbsfn_AreaInfo
				 [i]->mcch_Config_r9.mcch_Offset_r9)
				&&
				((UE_mac_inst[module_idP].mbsfn_AreaInfo
				  [i]->mcch_Config_r9.sf_AllocInfo_r9.
				  buf[0] & MBSFN_TDD_SF7) ==
				 MBSFN_TDD_SF7)) {
				mcch_flag = 1;
			    }

			    mtch_flag = 1;
			}
		    } else {	// FDD
			if ((UE_mac_inst[module_idP].mbsfn_SubframeConfig
			     [j]->subframeAllocation.choice.oneFrame.
			     buf[0] & MBSFN_FDD_SF7) == MBSFN_FDD_SF7) {
			    if (msi_pos == 5) {
				msi_flag = 1;
			    }

			    if ((frameP % mcch_period ==
				 UE_mac_inst[module_idP].mbsfn_AreaInfo
				 [i]->mcch_Config_r9.mcch_Offset_r9)
				&&
				((UE_mac_inst[module_idP].mbsfn_AreaInfo
				  [i]->mcch_Config_r9.sf_AllocInfo_r9.
				  buf[0] & MBSFN_FDD_SF7) ==
				 MBSFN_FDD_SF7)) {
				mcch_flag = 1;
			    }

			    mtch_flag = 1;
			}
		    }

		    break;

		case 8:
		    if (frame_FDD == 0) {	//TDD
			if ((UE_mac_inst[module_idP].mbsfn_SubframeConfig
			     [j]->subframeAllocation.choice.oneFrame.
			     buf[0] & MBSFN_TDD_SF8) == MBSFN_TDD_SF8) {
			    if (msi_pos == 4) {
				msi_flag = 1;
			    }

			    if ((frameP % mcch_period ==
				 UE_mac_inst[module_idP].mbsfn_AreaInfo
				 [i]->mcch_Config_r9.mcch_Offset_r9)
				&&
				((UE_mac_inst[module_idP].mbsfn_AreaInfo
				  [i]->mcch_Config_r9.sf_AllocInfo_r9.
				  buf[0] & MBSFN_TDD_SF8) ==
				 MBSFN_TDD_SF8)) {
				mcch_flag = 1;
			    }

			    mtch_flag = 1;
			}
		    } else {	// FDD
			if ((UE_mac_inst[module_idP].mbsfn_SubframeConfig
			     [j]->subframeAllocation.choice.oneFrame.
			     buf[0] & MBSFN_FDD_SF8) == MBSFN_FDD_SF8) {
			    if (msi_pos == 6) {
				msi_flag = 1;
			    }

			    if ((frameP % mcch_period ==
				 UE_mac_inst[module_idP].mbsfn_AreaInfo
				 [i]->mcch_Config_r9.mcch_Offset_r9)
				&&
				((UE_mac_inst[module_idP].mbsfn_AreaInfo
				  [i]->mcch_Config_r9.sf_AllocInfo_r9.
				  buf[0] & MBSFN_FDD_SF8) ==
				 MBSFN_FDD_SF8)) {
				mcch_flag = 1;
			    }

			    mtch_flag = 1;
			}
		    }

		    break;

		case 9:
		    if (frame_FDD == 0) {
			if ((UE_mac_inst[module_idP].mbsfn_SubframeConfig
			     [j]->subframeAllocation.choice.oneFrame.
			     buf[0] & MBSFN_TDD_SF9) == MBSFN_TDD_SF9) {
			    if (msi_pos == 5) {
				msi_flag = 1;
			    }

			    if ((frameP % mcch_period ==
				 UE_mac_inst[module_idP].mbsfn_AreaInfo
				 [i]->mcch_Config_r9.mcch_Offset_r9)
				&&
				((UE_mac_inst[module_idP].mbsfn_AreaInfo
				  [i]->mcch_Config_r9.sf_AllocInfo_r9.
				  buf[0] & MBSFN_TDD_SF9) ==
				 MBSFN_TDD_SF9)) {
				mcch_flag = 1;
			    }

			    mtch_flag = 1;
			}
		    }

		    break;
		}		// end switch

		// sf allocation is non-overlapping
		if ((msi_flag == 1) || (mcch_flag == 1)
		    || (mtch_flag == 1)) {
		    LOG_D(MAC,
			  "[UE %d] Frame %d Subframe %d: sync area %d SF alloc %d: msi flag %d, mcch flag %d, mtch flag %d\n",
			  module_idP, frameP, subframe, i, j, msi_flag,
			  mcch_flag, mtch_flag);

		    *sync_area = i;
		    break;
		}
	    } else {		// four-frameP format
	    }
	}
    }				// end of for
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Gabriel committed
1314
#if UE_TIMING_TRACE
1315
    stop_meas(&UE_mac_inst[module_idP].ue_query_mch);
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#endif
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    if ((mcch_flag == 1)) {	// || (msi_flag==1))
	*mcch_active = 1;
    }
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    if ((mcch_flag == 1)
	|| ((msi_flag == 1) && (UE_mac_inst[module_idP].mcch_status == 1))) {
	return mcch_mcs;
    } else if ((mtch_flag == 1)
	       && (UE_mac_inst[module_idP].msi_status == 1)) {
	return UE_mac_inst[module_idP].pmch_Config[0]->dataMCS_r9;
    } else {
	return -1;
    }
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}

#endif

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unsigned char
generate_ulsch_header(uint8_t * mac_header,
		      uint8_t num_sdus,
		      uint8_t short_padding,
		      uint16_t * sdu_lengths,
		      uint8_t * sdu_lcids,
		      POWER_HEADROOM_CMD * power_headroom,
		      uint16_t * crnti,
		      BSR_SHORT * truncated_bsr,
		      BSR_SHORT * short_bsr,
		      BSR_LONG * long_bsr, unsigned short post_padding)
1346
{
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    SCH_SUBHEADER_FIXED *mac_header_ptr =
	(SCH_SUBHEADER_FIXED *) mac_header;
    unsigned char first_element = 0, last_size = 0, i;
    unsigned char mac_header_control_elements[16], *ce_ptr;
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    LOG_D(MAC, "[UE] Generate ULSCH : num_sdus %d\n", num_sdus);
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#ifdef DEBUG_HEADER_PARSING
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    for (i = 0; i < num_sdus; i++) {
	LOG_T(MAC, "[UE] sdu %d : lcid %d length %d", i, sdu_lcids[i],
	      sdu_lengths[i]);
    }
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    LOG_T(MAC, "\n");
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#endif
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    ce_ptr = &mac_header_control_elements[0];

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

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    if (power_headroom) {
	if (first_element > 0) {
	    mac_header_ptr->E = 1;
	    mac_header_ptr++;
	} else {
	    first_element = 1;
	}

	mac_header_ptr->R = 0;
	mac_header_ptr->E = 0;
	mac_header_ptr->LCID = POWER_HEADROOM;
	last_size = 1;
	*((POWER_HEADROOM_CMD *) ce_ptr) = (*power_headroom);
	ce_ptr += sizeof(POWER_HEADROOM_CMD);
	LOG_D(MAC, "phr header size %zu\n", sizeof(POWER_HEADROOM_CMD));
    }
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    if (crnti) {
1400
#ifdef DEBUG_HEADER_PARSING
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	LOG_D(MAC, "[UE] CRNTI : %x (first_element %d)\n", *crnti,
	      first_element);
1403
#endif
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	if (first_element > 0) {
	    mac_header_ptr->E = 1;
	    mac_header_ptr++;
	} else {
	    first_element = 1;
	}

	mac_header_ptr->R = 0;
	mac_header_ptr->E = 0;
	mac_header_ptr->LCID = CRNTI;
	last_size = 1;
	*((uint16_t *) ce_ptr) = (*crnti);
	ce_ptr += sizeof(uint16_t);
	//    printf("offset %d\n",ce_ptr-mac_header_control_elements);
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    }

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    if (truncated_bsr) {
	if (first_element > 0) {
	    mac_header_ptr->E = 1;
	    /*
	       printf("last subheader : %x (R%d,E%d,LCID%d)\n",*(unsigned char*)mac_header_ptr,
	       ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->R,
	       ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->E,
	       ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->LCID);
	     */
	    mac_header_ptr++;
	} else {
	    first_element = 1;
	}
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#ifdef DEBUG_HEADER_PARSING
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	LOG_D(MAC, "[UE] Scheduler Truncated BSR Header\n");
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#endif
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	mac_header_ptr->R = 0;
	mac_header_ptr->E = 0;
	mac_header_ptr->LCID = TRUNCATED_BSR;
	last_size = 1;
	*((BSR_TRUNCATED *) ce_ptr) = (*truncated_bsr);
	ce_ptr += sizeof(BSR_TRUNCATED);
	//    printf("(cont_res) : offset %d\n",ce_ptr-mac_header_control_elements);

    } else if (short_bsr) {
	if (first_element > 0) {
	    mac_header_ptr->E = 1;
	    /*
	       printf("last subheader : %x (R%d,E%d,LCID%d)\n",*(unsigned char*)mac_header_ptr,
	       ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->R,
	       ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->E,
	       ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->LCID);
	     */
	    mac_header_ptr++;
	} else {
	    first_element = 1;
	}
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#ifdef DEBUG_HEADER_PARSING
1461
	LOG_D(MAC, "[UE] Scheduler SHORT BSR Header\n");
1462
#endif
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	mac_header_ptr->R = 0;
	mac_header_ptr->E = 0;
	mac_header_ptr->LCID = SHORT_BSR;
	last_size = 1;
	*((BSR_SHORT *) ce_ptr) = (*short_bsr);
	ce_ptr += sizeof(BSR_SHORT);

	//    printf("(cont_res) : offset %d\n",ce_ptr-mac_header_control_elements);
    } else if (long_bsr) {
	if (first_element > 0) {
	    mac_header_ptr->E = 1;
	    /*
	       printf("last subheader : %x (R%d,E%d,LCID%d)\n",*(unsigned char*)mac_header_ptr,
	       ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->R,
	       ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->E,
	       ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->LCID);
	     */
	    mac_header_ptr++;
	} else {
	    first_element = 1;
	}
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#ifdef DEBUG_HEADER_PARSING
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	LOG_D(MAC, "[UE] Scheduler Long BSR Header\n");
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#endif
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	mac_header_ptr->R = 0;
	mac_header_ptr->E = 0;
	mac_header_ptr->LCID = LONG_BSR;
	last_size = 1;

	*(ce_ptr) =
	    (long_bsr->
	     Buffer_size0 << 2) | ((long_bsr->Buffer_size1 & 0x30) >> 4);
	*(ce_ptr + 1) =
	    ((long_bsr->Buffer_size1 & 0x0F) << 4) | ((long_bsr->
						       Buffer_size2 & 0x3C)
						      >> 2);
	*(ce_ptr + 2) =
	    ((long_bsr->
	      Buffer_size2 & 0x03) << 2) | (long_bsr->Buffer_size3 & 0x3F);
	ce_ptr += BSR_LONG_SIZE;

	//    printf("(cont_res) : offset %d\n",ce_ptr-mac_header_control_elements);
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    }
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    //  printf("last_size %d,mac_header_ptr %p\n",last_size,mac_header_ptr);
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    for (i = 0; i < num_sdus; i++) {
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#ifdef DEBUG_HEADER_PARSING
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	LOG_T(MAC, "[UE] sdu subheader %d (lcid %d, %d bytes)\n", i,
	      sdu_lcids[i], sdu_lengths[i]);
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#endif

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	if ((i == (num_sdus - 1))
	    && ((short_padding) || (post_padding == 0))) {
	    if (first_element > 0) {
		mac_header_ptr->E = 1;
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#ifdef DEBUG_HEADER_PARSING
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		LOG_D(MAC, "[UE] last subheader : %x (R%d,E%d,LCID%d)\n",
		      *(unsigned char *) mac_header_ptr,
		      ((SCH_SUBHEADER_FIXED *) mac_header_ptr)->R,
		      ((SCH_SUBHEADER_FIXED *) mac_header_ptr)->E,
		      ((SCH_SUBHEADER_FIXED *) mac_header_ptr)->LCID);
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#endif
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		mac_header_ptr += last_size;
	    }
	    mac_header_ptr->R = 0;
	    mac_header_ptr->E = 0;
	    mac_header_ptr->LCID = sdu_lcids[i];
	} else {
	    if ((first_element > 0)) {
		mac_header_ptr->E = 1;
#ifdef DEBUG_HEADER_PARSING
		LOG_D(MAC, "[UE] last subheader : %x (R%d,E%d,LCID%d)\n",
		      *(unsigned char *) mac_header_ptr,
		      ((SCH_SUBHEADER_FIXED *) mac_header_ptr)->R,
		      ((SCH_SUBHEADER_FIXED *) mac_header_ptr)->E,
		      ((SCH_SUBHEADER_FIXED *) mac_header_ptr)->LCID);
#endif
		mac_header_ptr += last_size;
		//      printf("last_size %d,mac_header_ptr %p\n",last_size,mac_header_ptr);
	    } else {
		first_element = 1;

	    }

	    if (sdu_lengths[i] < 128) {
		((SCH_SUBHEADER_SHORT *) mac_header_ptr)->R = 0;	// 3
		((SCH_SUBHEADER_SHORT *) mac_header_ptr)->E = 0;
		((SCH_SUBHEADER_SHORT *) mac_header_ptr)->F = 0;
		((SCH_SUBHEADER_SHORT *) mac_header_ptr)->LCID =
		    sdu_lcids[i];
		((SCH_SUBHEADER_SHORT *) mac_header_ptr)->L =
		    (unsigned char) sdu_lengths[i];
		last_size = 2;
#ifdef DEBUG_HEADER_PARSING
		LOG_D(MAC, "[UE] short sdu\n");
		LOG_T(MAC,
		      "[UE] last subheader : %x (R%d,E%d,LCID%d,F%d,L%d)\n",
		      ((uint16_t *) mac_header_ptr)[0],
		      ((SCH_SUBHEADER_SHORT *) mac_header_ptr)->R,
		      ((SCH_SUBHEADER_SHORT *) mac_header_ptr)->E,
		      ((SCH_SUBHEADER_SHORT *) mac_header_ptr)->LCID,
		      ((SCH_SUBHEADER_SHORT *) mac_header_ptr)->F,
		      ((SCH_SUBHEADER_SHORT *) mac_header_ptr)->L);
#endif
	    } else {
		((SCH_SUBHEADER_LONG *) mac_header_ptr)->R = 0;
		((SCH_SUBHEADER_LONG *) mac_header_ptr)->E = 0;
		((SCH_SUBHEADER_LONG *) mac_header_ptr)->F = 1;
		((SCH_SUBHEADER_LONG *) mac_header_ptr)->LCID =
		    sdu_lcids[i];
		((SCH_SUBHEADER_LONG *) mac_header_ptr)->L_MSB =
		    ((unsigned short) sdu_lengths[i] >> 8) & 0x7f;
		((SCH_SUBHEADER_LONG *) mac_header_ptr)->L_LSB =
		    (unsigned short) sdu_lengths[i] & 0xff;
		((SCH_SUBHEADER_LONG *) mac_header_ptr)->padding = 0x00;
		last_size = 3;
#ifdef DEBUG_HEADER_PARSING
		LOG_D(MAC, "[UE] long sdu\n");
#endif
	    }
	}
1585
    }
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    if (post_padding > 0) {	// we have lots of padding at the end of the packet
	mac_header_ptr->E = 1;
	mac_header_ptr += last_size;
	// add a padding element
	mac_header_ptr->R = 0;
	mac_header_ptr->E = 0;
	mac_header_ptr->LCID = SHORT_PADDING;
	mac_header_ptr++;
    } else {			// no end of packet padding
	// last SDU subhead is of fixed type (sdu length implicitly to be computed at UE)
	mac_header_ptr++;
	//mac_header_ptr=last_size; // FIXME: should be ++
    }
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