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openairinterface5g/openair2/LAYER2/MAC/eNB_scheduler_mch.c
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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
*
* http://www.openairinterface.org/?page_id=698
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
/*! \file eNB_scheduler_mch.c
* \brief procedures related to eNB for the MCH transport channel
* \author Navid Nikaein and Raymond Knopp
* \date 2012 - 2014
* \email: navid.nikaein@eurecom.fr
* \version 1.0
* @ingroup _mac
*/
#include "assertions.h"
#include "PHY/defs.h"
#include "PHY/extern.h"
#include "SCHED/defs.h"
#include "SCHED/extern.h"
#include "LAYER2/MAC/defs.h"
#include "LAYER2/MAC/proto.h"
#include "LAYER2/MAC/extern.h"
#include "UTIL/LOG/log.h"
#include "UTIL/LOG/vcd_signal_dumper.h"
#include "UTIL/OPT/opt.h"
#include "OCG.h"
#include "OCG_extern.h"
#include "RRC/LITE/extern.h"
#include "RRC/L2_INTERFACE/openair_rrc_L2_interface.h"
//#include "LAYER2/MAC/pre_processor.c"
#include "pdcp.h"
#if defined(ENABLE_ITTI)
#include "intertask_interface.h"
#endif
#include "SIMULATION/TOOLS/defs.h" // for taus
#define ENABLE_MAC_PAYLOAD_DEBUG
#define DEBUG_eNB_SCHEDULER 1
extern RAN_CONTEXT_t RC;
#if defined(Rel10) || defined(Rel14)
int8_t
get_mbsfn_sf_alloction(module_id_t module_idP, uint8_t CC_id,
uint8_t mbsfn_sync_area)
{
// currently there is one-to-one mapping between sf allocation pattern and sync area
if (mbsfn_sync_area > MAX_MBSFN_AREA) {
LOG_W(MAC,
"[eNB %d] CC_id %d MBSFN synchronization area %d out of range\n ",
module_idP, CC_id, mbsfn_sync_area);
return -1;
} else if (RC.mac[module_idP]->
common_channels[CC_id].mbsfn_SubframeConfig[mbsfn_sync_area]
!= NULL) {
return mbsfn_sync_area;
} else {
LOG_W(MAC,
"[eNB %d] CC_id %d MBSFN Subframe Config pattern %d not found \n ",
module_idP, CC_id, mbsfn_sync_area);
return -1;
}
}
int
schedule_MBMS(module_id_t module_idP, uint8_t CC_id, frame_t frameP,
sub_frame_t subframeP)
{
int mcch_flag = 0, mtch_flag = 0, msi_flag = 0;
int mbsfn_period = 0; // 1<<(RC.mac[module_idP]->mbsfn_SubframeConfig[0]->radioframeAllocationPeriod);
int mcch_period = 0; //32<<(RC.mac[module_idP]->mbsfn_AreaInfo[0]->mcch_Config_r9.mcch_RepetitionPeriod_r9);
int mch_scheduling_period =
8 << (RC.mac[module_idP]->common_channels[CC_id].
pmch_Config[0]->mch_SchedulingPeriod_r9);
unsigned char mcch_sdu_length;
unsigned char header_len_mcch = 0, header_len_msi =
0, header_len_mtch = 0, header_len_mtch_temp =
0, header_len_mcch_temp = 0, header_len_msi_temp = 0;
int ii = 0, msi_pos = 0;
int mcch_mcs = -1;
uint16_t TBS, j = -1, padding = 0, post_padding = 0;
mac_rlc_status_resp_t rlc_status;
int num_mtch;
int msi_length, i, k;
unsigned char sdu_lcids[11], num_sdus = 0, offset = 0;
uint16_t sdu_lengths[11], sdu_length_total = 0;
unsigned char mch_buffer[MAX_DLSCH_PAYLOAD_BYTES]; // check the max value, this is for dlsch only
COMMON_channels_t *cc = &RC.mac[module_idP]->common_channels[CC_id];
cc->MCH_pdu.Pdu_size = 0;
for (i = 0; i < cc->num_active_mbsfn_area; i++) {
// assume, that there is always a mapping
if ((j = get_mbsfn_sf_alloction(module_idP, CC_id, i)) == -1) {
return 0;
}
mbsfn_period =
1 << (cc->mbsfn_SubframeConfig[j]->radioframeAllocationPeriod);
mcch_period =
32 << (cc->mbsfn_AreaInfo[i]->
mcch_Config_r9.mcch_RepetitionPeriod_r9);
msi_pos = 0;
ii = 0;
LOG_D(MAC,
"[eNB %d] CC_id %d Frame %d subframeP %d : Checking MBSFN Sync Area %d/%d with SF allocation %d/%d for MCCH and MTCH (mbsfn period %d, mcch period %d)\n",
module_idP, CC_id, frameP, subframeP, i,
cc->num_active_mbsfn_area, j, cc->num_sf_allocation_pattern,
mbsfn_period, mcch_period);
switch (cc->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;
}
// 1st: Check the MBSFN subframes from SIB2 info (SF allocation pattern i, max 8 non-overlapping patterns exist)
if (frameP % mbsfn_period == cc->mbsfn_SubframeConfig[j]->radioframeAllocationOffset) { // MBSFN frameP
if (cc->mbsfn_SubframeConfig[j]->subframeAllocation.present == MBSFN_SubframeConfig__subframeAllocation_PR_oneFrame) { // one-frameP format
// Find the first subframeP in this MCH to transmit MSI
if (frameP % mch_scheduling_period ==
cc->mbsfn_SubframeConfig[j]->
radioframeAllocationOffset) {
while (ii == 0) {
ii = cc->
mbsfn_SubframeConfig[j]->subframeAllocation.
choice.oneFrame.buf[0] & (0x80 >> msi_pos);
msi_pos++;
}
LOG_D(MAC,
"[eNB %d] CC_id %d Frame %d subframeP %d : sync area %d sf allocation pattern %d sf alloc %x msi pos is %d \n",
module_idP, CC_id, frameP, subframeP, i, j,
cc->mbsfn_SubframeConfig[j]->
subframeAllocation.choice.oneFrame.buf[0],
msi_pos);
}
// Check if the subframeP is for MSI, MCCH or MTCHs and Set the correspoding flag to 1
switch (subframeP) {
case 1:
if (cc->tdd_Config == NULL) {
if ((cc->
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 ==
cc->mbsfn_AreaInfo[i]->
mcch_Config_r9.mcch_Offset_r9)
&&
((cc->mbsfn_AreaInfo[i]->
mcch_Config_r9.sf_AllocInfo_r9.
buf[0] & MBSFN_FDD_SF1) ==
MBSFN_FDD_SF1)) {
mcch_flag = 1;
}
mtch_flag = 1;
}
}
break;
case 2:
if (cc->tdd_Config == NULL) {
if ((cc->
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 ==
cc->mbsfn_AreaInfo[i]->
mcch_Config_r9.mcch_Offset_r9)
&&
((cc->mbsfn_AreaInfo[i]->
mcch_Config_r9.sf_AllocInfo_r9.
buf[0] & MBSFN_FDD_SF2) ==
MBSFN_FDD_SF2)) {
mcch_flag = 1;
}
mtch_flag = 1;
}
}
break;
case 3:
if (cc->tdd_Config != NULL) { // TDD
if ((cc->
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 ==
cc->mbsfn_AreaInfo[i]->
mcch_Config_r9.mcch_Offset_r9)
&&
((cc->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 ((cc->
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 ==
cc->mbsfn_AreaInfo[i]->
mcch_Config_r9.mcch_Offset_r9)
&&
((cc->mbsfn_AreaInfo[i]->
mcch_Config_r9.sf_AllocInfo_r9.
buf[0] & MBSFN_FDD_SF3) ==
MBSFN_FDD_SF3)) {
mcch_flag = 1;
}
mtch_flag = 1;
}
}
break;
case 4:
if (cc->tdd_Config != NULL) {
if ((cc->
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 ==
cc->mbsfn_AreaInfo[i]->
mcch_Config_r9.mcch_Offset_r9)
&&
((cc->mbsfn_AreaInfo[i]->
mcch_Config_r9.sf_AllocInfo_r9.
buf[0] & MBSFN_TDD_SF4) ==
MBSFN_TDD_SF4)) {
mcch_flag = 1;
}
mtch_flag = 1;
}
}
break;
case 6:
if (cc->tdd_Config == NULL) {
if ((cc->
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 ==
cc->mbsfn_AreaInfo[i]->
mcch_Config_r9.mcch_Offset_r9)
&&
((cc->mbsfn_AreaInfo[i]->
mcch_Config_r9.sf_AllocInfo_r9.
buf[0] & MBSFN_FDD_SF6) ==
MBSFN_FDD_SF6)) {
mcch_flag = 1;
}
mtch_flag = 1;
}
}
break;
case 7:
if (cc->tdd_Config != NULL) { // TDD
if ((cc->
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 ==
cc->mbsfn_AreaInfo[i]->
mcch_Config_r9.mcch_Offset_r9)
&&
((cc->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 ((cc->
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 ==
cc->mbsfn_AreaInfo[i]->
mcch_Config_r9.mcch_Offset_r9)
&&
((cc->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 (cc->tdd_Config != NULL) { //TDD
if ((cc->
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 ==
cc->mbsfn_AreaInfo[i]->
mcch_Config_r9.mcch_Offset_r9)
&&
((cc->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 ((cc->
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 ==
cc->mbsfn_AreaInfo[i]->
mcch_Config_r9.mcch_Offset_r9)
&&
((cc->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 (cc->tdd_Config != NULL) {
if ((cc->
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 ==
cc->mbsfn_AreaInfo[i]->
mcch_Config_r9.mcch_Offset_r9)
&&
((cc->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,
"[eNB %d] CC_id %d Frame %d Subframe %d: sync area %d SF alloc %d: msi flag %d, mcch flag %d, mtch flag %d\n",
module_idP, CC_id, frameP, subframeP, i, j,
msi_flag, mcch_flag, mtch_flag);
break;
}
} else { // four-frameP format
}
}
} // end of for loop
cc->msi_active = 0;
cc->mcch_active = 0;
cc->mtch_active = 0;
// Calculate the mcs
if ((msi_flag == 1) || (mcch_flag == 1)) {
cc->MCH_pdu.mcs = mcch_mcs;
} else if (mtch_flag == 1) { // only MTCH in this subframeP
cc->MCH_pdu.mcs = cc->pmch_Config[0]->dataMCS_r9;
}
// 2nd: Create MSI, get MCCH from RRC and MTCHs from RLC
// there is MSI (MCH Scheduling Info)
if (msi_flag == 1) {
// Create MSI here
uint16_t msi_control_element[29], *msi_ptr;
msi_ptr = &msi_control_element[0];
((MSI_ELEMENT *) msi_ptr)->lcid = MCCH_LCHANID; //MCCH
if (mcch_flag == 1) {
((MSI_ELEMENT *) msi_ptr)->stop_sf_MSB = 0;
((MSI_ELEMENT *) msi_ptr)->stop_sf_LSB = 0;
} else { // no mcch for this MSP
((MSI_ELEMENT *) msi_ptr)->stop_sf_MSB = 0x7; // stop value is 2047
((MSI_ELEMENT *) msi_ptr)->stop_sf_LSB = 0xff;
}
msi_ptr += sizeof(MSI_ELEMENT);
//Header for MTCHs
num_mtch = cc->mbms_SessionList[0]->list.count;
for (k = 0; k < num_mtch; k++) { // loop for all session in this MCH (MCH[0]) at this moment
((MSI_ELEMENT *) msi_ptr)->lcid = cc->mbms_SessionList[0]->list.array[k]->logicalChannelIdentity_r9; //mtch_lcid;
((MSI_ELEMENT *) msi_ptr)->stop_sf_MSB = 0; // last subframeP of this mtch (only one mtch now)
((MSI_ELEMENT *) msi_ptr)->stop_sf_LSB = 0xB;
msi_ptr += sizeof(MSI_ELEMENT);
}
msi_length = msi_ptr - msi_control_element;
if (msi_length < 128) {
header_len_msi = 2;
} else {
header_len_msi = 3;
}
LOG_D(MAC,
"[eNB %d] CC_id %d Frame %d : MSI->MCH, length of MSI is %d bytes \n",
module_idP, CC_id, frameP, msi_length);
//LOG_D(MAC,"Scheduler: MSI is transmitted in this subframeP \n" );
// LOG_D(MAC,"Scheduler: MSI length is %d bytes\n",msi_length);
// Store MSI data to mch_buffer[0]
memcpy((char *) &mch_buffer[sdu_length_total],
msi_control_element, msi_length);
sdu_lcids[num_sdus] = MCH_SCHDL_INFO;
sdu_lengths[num_sdus] = msi_length;
sdu_length_total += sdu_lengths[num_sdus];
LOG_I(MAC, "[eNB %d] CC_id %d Create %d bytes for MSI\n",
module_idP, CC_id, sdu_lengths[num_sdus]);
num_sdus++;
cc->msi_active = 1;
}
// there is MCCH
if (mcch_flag == 1) {
LOG_D(MAC,
"[eNB %d] CC_id %d Frame %d Subframe %d: Schedule MCCH MESSAGE (area %d, sfAlloc %d)\n",
module_idP, CC_id, frameP, subframeP, i, j);
mcch_sdu_length = mac_rrc_data_req(module_idP, CC_id, frameP, MCCH, 1, &cc->MCCH_pdu.payload[0],
i); // this is the mbsfn sync area index
if (mcch_sdu_length > 0) {
LOG_D(MAC,
"[eNB %d] CC_id %d Frame %d subframeP %d : MCCH->MCH, Received %d bytes from RRC \n",
module_idP, CC_id, frameP, subframeP, mcch_sdu_length);
header_len_mcch = 2;
if (cc->tdd_Config != NULL) {
LOG_D(MAC,
"[eNB %d] CC_id %d Frame %d subframeP %d: Scheduling MCCH->MCH (TDD) for MCCH message %d bytes (mcs %d )\n",
module_idP, CC_id, frameP, subframeP,
mcch_sdu_length, mcch_mcs);
} else {
LOG_I(MAC,
"[eNB %d] CC_id %d Frame %d subframeP %d: Scheduling MCCH->MCH (FDD) for MCCH message %d bytes (mcs %d)\n",
module_idP, CC_id, frameP, subframeP,
mcch_sdu_length, mcch_mcs);
}
cc->mcch_active = 1;
memcpy((char *) &mch_buffer[sdu_length_total],
&cc->MCCH_pdu.payload[0], mcch_sdu_length);
sdu_lcids[num_sdus] = MCCH_LCHANID;
sdu_lengths[num_sdus] = mcch_sdu_length;
if (sdu_lengths[num_sdus] > 128) {
header_len_mcch = 3;
}
sdu_length_total += sdu_lengths[num_sdus];
LOG_D(MAC,
"[eNB %d] CC_id %d Got %d bytes for MCCH from RRC \n",
module_idP, CC_id, sdu_lengths[num_sdus]);
num_sdus++;
}
}
TBS =
get_TBS_DL(cc->MCH_pdu.mcs, to_prb(cc->mib->message.dl_Bandwidth));
#if defined(Rel10) || defined(Rel14)
// do not let mcch and mtch multiplexing when relaying is active
// for sync area 1, so not transmit data
//if ((i == 0) && ((RC.mac[module_idP]->MBMS_flag != multicast_relay) || (RC.mac[module_idP]->mcch_active==0))) {
#endif
// there is MTCHs, loop if there are more than 1
if (mtch_flag == 1) {
// Calculate TBS
/* if ((msi_flag==1) || (mcch_flag==1)) {
TBS = mac_xface->get_TBS(mcch_mcs, mac_xface->frame_parms->N_RB_DL);
}
else { // only MTCH in this subframeP
TBS = mac_xface->get_TBS(RC.mac[module_idP]->pmch_Config[0]->dataMCS_r9, mac_xface->frame_parms->N_RB_DL);
}
// get MTCH data from RLC (like for DTCH)
LOG_D(MAC,"[eNB %d] CC_id %d Frame %d subframe %d: Schedule MTCH (area %d, sfAlloc %d)\n",Mod_id,CC_id,frame,subframe,i,j);
header_len_mtch = 3;
LOG_D(MAC,"[eNB %d], CC_id %d, Frame %d, MTCH->MCH, Checking RLC status (rab %d, tbs %d, len %d)\n",
Mod_id,CC_id,frame,MTCH,TBS,
TBS-header_len_mcch-header_len_msi-sdu_length_total-header_len_mtch);
rlc_status = mac_rlc_status_ind(Mod_id,frame,1,RLC_MBMS_YES,MTCH+ (maxDRB + 3) * MAX_MOBILES_PER_RG,
TBS-header_len_mcch-header_len_msi-sdu_length_total-header_len_mtch);
printf("frame %d, subframe %d, rlc_status.bytes_in_buffer is %d\n",frame,subframe, rlc_status.bytes_in_buffer);
*/
// get MTCH data from RLC (like for DTCH)
LOG_D(MAC,
"[eNB %d] CC_id %d Frame %d subframeP %d: Schedule MTCH (area %d, sfAlloc %d)\n",
module_idP, CC_id, frameP, subframeP, i, j);
header_len_mtch = 3;
LOG_D(MAC,
"[eNB %d], CC_id %d, Frame %d, MTCH->MCH, Checking RLC status (rab %d, tbs %d, len %d)\n",
module_idP, CC_id, frameP, MTCH, TBS,
TBS - header_len_mcch - header_len_msi - sdu_length_total -
header_len_mtch);
rlc_status =
mac_rlc_status_ind(module_idP, 0, frameP, subframeP,
module_idP, ENB_FLAG_YES, MBMS_FLAG_YES,
MTCH,
TBS - header_len_mcch - header_len_msi -
sdu_length_total - header_len_mtch);
LOG_D(MAC,
"e-MBMS log channel %u frameP %d, subframeP %d, rlc_status.bytes_in_buffer is %d\n",
MTCH, frameP, subframeP, rlc_status.bytes_in_buffer);
if (rlc_status.bytes_in_buffer > 0) {
LOG_I(MAC,
"[eNB %d][MBMS USER-PLANE], CC_id %d, Frame %d, MTCH->MCH, Requesting %d bytes from RLC (header len mtch %d)\n",
module_idP, CC_id, frameP,
TBS - header_len_mcch - header_len_msi -
sdu_length_total - header_len_mtch, header_len_mtch);
sdu_lengths[num_sdus] = mac_rlc_data_req(module_idP, 0, module_idP, frameP, ENB_FLAG_YES, MBMS_FLAG_YES, MTCH, 0, //not used
(char *)
&mch_buffer
[sdu_length_total]);
//sdu_lengths[num_sdus] = mac_rlc_data_req(module_idP,frameP, MBMS_FLAG_NO, MTCH+(MAX_NUM_RB*(NUMBER_OF_UE_MAX+1)), (char*)&mch_buffer[sdu_length_total]);
LOG_I(MAC,
"[eNB %d][MBMS USER-PLANE] CC_id %d Got %d bytes for MTCH %d\n",
module_idP, CC_id, sdu_lengths[num_sdus], MTCH);
cc->mtch_active = 1;
sdu_lcids[num_sdus] = MTCH;
sdu_length_total += sdu_lengths[num_sdus];
if (sdu_lengths[num_sdus] < 128) {
header_len_mtch = 2;
}
num_sdus++;
} else {
header_len_mtch = 0;
}
}
#if defined(Rel10) || defined(Rel14)
// }
#endif
// FINAL STEP: Prepare and multiplexe MSI, MCCH and MTCHs
if ((sdu_length_total + header_len_msi + header_len_mcch +
header_len_mtch) > 0) {
// Adjust the last subheader
/* if ((msi_flag==1) || (mcch_flag==1)) {
RC.mac[module_idP]->MCH_pdu.mcs = mcch_mcs;
}
else if (mtch_flag == 1) { // only MTCH in this subframeP
RC.mac[module_idP]->MCH_pdu.mcs = RC.mac[module_idP]->pmch_Config[0]->dataMCS_r9;
}
*/
header_len_mtch_temp = header_len_mtch;
header_len_mcch_temp = header_len_mcch;
header_len_msi_temp = header_len_msi;
if (header_len_mtch > 0) {
header_len_mtch = 1; // remove Length field in the subheader for the last PDU
} else if (header_len_mcch > 0) {
header_len_mcch = 1;
} else {
header_len_msi = 1;
}
// Calculate the padding
if ((TBS - header_len_mtch - header_len_mcch - header_len_msi -
sdu_length_total) < 0) {
LOG_E(MAC, "Error in building MAC PDU, TBS %d < PDU %d \n",
TBS,
header_len_mtch + header_len_mcch + header_len_msi +
sdu_length_total);
return 0;
} else
if ((TBS - header_len_mtch - header_len_mcch - header_len_msi -
sdu_length_total) <= 2) {
padding =
(TBS - header_len_mtch - header_len_mcch - header_len_msi -
sdu_length_total);
post_padding = 0;
} else { // using post_padding, give back the Length field of subheader for the last PDU
padding = 0;
if (header_len_mtch > 0) {
header_len_mtch = header_len_mtch_temp;
} else if (header_len_mcch > 0) {
header_len_mcch = header_len_mcch_temp;
} else {
header_len_msi = header_len_msi_temp;
}
post_padding =
TBS - sdu_length_total - header_len_msi - header_len_mcch -
header_len_mtch;
}
// Generate the MAC Header for MCH
// here we use the function for DLSCH because DLSCH & MCH have the same Header structure
offset = generate_dlsch_header((unsigned char *) cc->MCH_pdu.payload, num_sdus, sdu_lengths, sdu_lcids, 255, // no drx
31, // no timing advance
NULL, // no contention res id
padding, post_padding);
cc->MCH_pdu.Pdu_size = TBS;
cc->MCH_pdu.sync_area = i;
cc->MCH_pdu.msi_active = cc->msi_active;
cc->MCH_pdu.mcch_active = cc->mcch_active;
cc->MCH_pdu.mtch_active = cc->mtch_active;
LOG_D(MAC,
" MCS for this sf is %d (mcch active %d, mtch active %d)\n",
cc->MCH_pdu.mcs, cc->MCH_pdu.mcch_active,
cc->MCH_pdu.mtch_active);
LOG_I(MAC,
"[eNB %d][MBMS USER-PLANE ] CC_id %d Generate header : sdu_length_total %d, num_sdus %d, sdu_lengths[0] %d, sdu_lcids[0] %d => payload offset %d,padding %d,post_padding %d (mcs %d, TBS %d), header MTCH %d, header MCCH %d, header MSI %d\n",
module_idP, CC_id, sdu_length_total, num_sdus,
sdu_lengths[0], sdu_lcids[0], offset, padding, post_padding,
cc->MCH_pdu.mcs, TBS, header_len_mtch, header_len_mcch,
header_len_msi);
// copy SDU to mch_pdu after the MAC Header
memcpy(&cc->MCH_pdu.payload[offset], mch_buffer, sdu_length_total);
// filling remainder of MCH with random data if necessery
for (j = 0; j < (TBS - sdu_length_total - offset); j++) {
cc->MCH_pdu.payload[offset + sdu_length_total + j] =
(char) (taus() & 0xff);
}
/* Tracing of PDU is done on UE side */
if (opt_enabled == 1) {
trace_pdu(1, (uint8_t *) cc->MCH_pdu.payload, TBS, module_idP, 6, 0xffff, // M_RNTI = 6 in wirehsark
RC.mac[module_idP]->frame,
RC.mac[module_idP]->subframe, 0, 0);
LOG_D(OPT,
"[eNB %d][MCH] CC_id %d Frame %d : MAC PDU with size %d\n",
module_idP, CC_id, frameP, TBS);
}
/*
for (j=0;j<sdu_length_total;j++)
printf("%2x.",RC.mac[module_idP]->MCH_pdu.payload[j+offset]);
printf(" \n"); */
return 1;
} else {
cc->MCH_pdu.Pdu_size = 0;
cc->MCH_pdu.sync_area = 0;
cc->MCH_pdu.msi_active = 0;
cc->MCH_pdu.mcch_active = 0;
cc->MCH_pdu.mtch_active = 0;
// for testing purpose, fill with random data
//for (j=0;j<(TBS-sdu_length_total-offset);j++)
// RC.mac[module_idP]->MCH_pdu.payload[offset+sdu_length_total+j] = (char)(taus()&0xff);
return 0;
}
//this is for testing
/*
if (mtch_flag == 1) {
// LOG_D(MAC,"DUY: mch_buffer length so far is : %ld\n", &mch_buffer[sdu_length_total]-&mch_buffer[0]);
return 1;
}
else
return 0;
*/
}
MCH_PDU *get_mch_sdu(module_id_t module_idP, int CC_id, frame_t frameP,
sub_frame_t subframeP)
{
// RC.mac[module_idP]->MCH_pdu.mcs=0;
//LOG_D(MAC," MCH_pdu.mcs is %d\n", RC.mac[module_idP]->MCH_pdu.mcs);
//#warning "MCH pdu should take the CC_id index"
return (&RC.mac[module_idP]->common_channels[CC_id].MCH_pdu);
}
#endif
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