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8d5901c815eb62156b0f177f13c83012027fd482
openairinterface5g/openair2/LAYER2/MAC/eNB_scheduler_primitives.c
T
Cedric Roux 8d5901c815 bugfix: fix bug "Unknown UE_id for rnti" 
This bug happens when we detect uplink failure for one UE.
In this case, a DCI format 1A is sent to the UE to ask it
to do random acces.

The way this DCI is generated was not compatible with how
the software is organized. It was expected that the DCI are
added (with add_ue_spec_dci and add_common_dci) in a very
specific order: first all DCIs in common space are added
(with add_common_dci) then all DCIs in UE specific space
are added (with add_ue_spec_dci).

The problem was that the DCI format 1A DCI sent to the UE
for it to do random access is added (with add_ue_spec_dci)
before the DCIs in common space.

That totally messed up the logic in add_common_dci and
add_ue_spec_dci.

The solution is to get rid of Num_common_dci and Num_ue_spec_dci,
replace those two counters by only one (Num_dci) and add
"search_space" in the dci_alloc structure to be used later by
the function "allocate_CCEs" when calling "get_nCCE_offset".

The software had to be adapted to the new variables, everywhere.

I am not sure that the simulators work. It seems that some
of them didn't use Num_common_dci and Num_ue_spec_dci to
decide on what space (common or UE specific) to put the DCI,
but relied on the rnti (comparing with SI_RNTI). To be tested
properly.

The modified simulators are:
  - openair1/SIMULATION/LTE_PHY/dlsim.c
  - openair1/SIMULATION/LTE_PHY/dlsim_tm4.c
  - openair1/SIMULATION/LTE_PHY/dlsim_tm7.c
  - openair1/SIMULATION/LTE_PHY/framegen.c
  - openair1/SIMULATION/LTE_PHY/pdcchsim.c
  - openair1/SIMULATION/LTE_PHY/syncsim.c
2017-07-27 17:12:19 +02:00

1196 lines
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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 1.0 (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_primitives.c
* \brief primitives used by eNB for BCH, RACH, ULSCH, DLSCH scheduling
* \author Navid Nikaein and Raymond Knopp
* \date 2010 - 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/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)
# include "intertask_interface.h"
#endif
#define ENABLE_MAC_PAYLOAD_DEBUG
#define DEBUG_eNB_SCHEDULER 1
//------------------------------------------------------------------------------
void init_ue_sched_info(void)
//------------------------------------------------------------------------------
{
module_id_t i,j,k;
for (i=0; i<NUMBER_OF_eNB_MAX; i++) {
for (k=0; k<MAX_NUM_CCs; k++) {
for (j=0; j<NUMBER_OF_UE_MAX; j++) {
// init DL
eNB_dlsch_info[i][k][j].weight = 0;
eNB_dlsch_info[i][k][j].subframe = 0;
eNB_dlsch_info[i][k][j].serving_num = 0;
eNB_dlsch_info[i][k][j].status = S_DL_NONE;
// init UL
eNB_ulsch_info[i][k][j].subframe = 0;
eNB_ulsch_info[i][k][j].serving_num = 0;
eNB_ulsch_info[i][k][j].status = S_UL_NONE;
}
}
}
}
//------------------------------------------------------------------------------
unsigned char get_ue_weight(module_id_t module_idP, int CC_id, int ue_idP)
//------------------------------------------------------------------------------
{
return(eNB_dlsch_info[module_idP][CC_id][ue_idP].weight);
}
//------------------------------------------------------------------------------
DCI_PDU *get_dci_sdu(module_id_t module_idP, int CC_id,frame_t frameP, sub_frame_t subframeP)
//------------------------------------------------------------------------------
{
return(&eNB_mac_inst[module_idP].common_channels[CC_id].DCI_pdu);
}
//------------------------------------------------------------------------------
int find_UE_id(module_id_t mod_idP, rnti_t rntiP)
//------------------------------------------------------------------------------
{
int UE_id;
UE_list_t *UE_list = &eNB_mac_inst[mod_idP].UE_list;
for (UE_id = 0; UE_id < NUMBER_OF_UE_MAX; UE_id++) {
if (UE_list->active[UE_id] != TRUE) continue;
if (UE_list->UE_template[UE_PCCID(mod_idP,UE_id)][UE_id].rnti==rntiP) {
return(UE_id);
}
}
return(-1);
}
//------------------------------------------------------------------------------
int UE_num_active_CC(UE_list_t *listP,int ue_idP)
//------------------------------------------------------------------------------
{
return(listP->numactiveCCs[ue_idP]);
}
//------------------------------------------------------------------------------
int UE_PCCID(module_id_t mod_idP,int ue_idP)
//------------------------------------------------------------------------------
{
return(eNB_mac_inst[mod_idP].UE_list.pCC_id[ue_idP]);
}
//------------------------------------------------------------------------------
rnti_t UE_RNTI(module_id_t mod_idP, int ue_idP)
//------------------------------------------------------------------------------
{
rnti_t rnti = eNB_mac_inst[mod_idP].UE_list.UE_template[UE_PCCID(mod_idP,ue_idP)][ue_idP].rnti;
if (rnti>0) {
return (rnti);
}
LOG_D(MAC,"[eNB %d] Couldn't find RNTI for UE %d\n",mod_idP,ue_idP);
//display_backtrace();
return(NOT_A_RNTI);
}
//------------------------------------------------------------------------------
boolean_t is_UE_active(module_id_t mod_idP, int ue_idP)
//------------------------------------------------------------------------------
{
return(eNB_mac_inst[mod_idP].UE_list.active[ue_idP]);
}
/*
uint8_t find_active_UEs(module_id_t module_idP,int CC_id){
module_id_t ue_mod_id = 0;
rnti_t rnti = 0;
uint8_t nb_active_ue = 0;
for (ue_mod_id=0;ue_mod_id<NUMBER_OF_UE_MAX;ue_mod_id++) {
if (((rnti=eNB_mac_inst[module_idP][CC_id].UE_template[ue_mod_id].rnti) !=0)&&(eNB_mac_inst[module_idP][CC_id].UE_template[ue_mod_id].ul_active==TRUE)){
if (mac_xface->get_eNB_UE_stats(module_idP,rnti) != NULL){ // check at the phy enb_ue state for this rnti
nb_active_ue++;
}
else { // this ue is removed at the phy => remove it at the mac as well
mac_remove_ue(module_idP, CC_id, ue_mod_id);
}
}
}
return(nb_active_ue);
}
*/
// get aggregation (L) form phy for a give UE
unsigned char get_aggregation (uint8_t bw_index, uint8_t cqi, uint8_t dci_fmt)
{
unsigned char aggregation=3;
switch (dci_fmt){
case format0:
aggregation = cqi2fmt0_agg[bw_index][cqi];
break;
case format1:
case format1A:
case format1B:
case format1D:
aggregation = cqi2fmt1x_agg[bw_index][cqi];
break;
case format2:
case format2A:
case format2B:
case format2C:
case format2D:
aggregation = cqi2fmt2x_agg[bw_index][cqi];
break;
case format1C:
case format1E_2A_M10PRB:
case format3:
case format3A:
case format4:
default:
LOG_W(MAC,"unsupported DCI format %d\n",dci_fmt);
}
LOG_D(MAC,"Aggregation level %d (cqi %d, bw_index %d, format %d)\n",
1<<aggregation, cqi,bw_index,dci_fmt);
return aggregation;
}
#ifdef CBA
/*
uint8_t find_num_active_UEs_in_cbagroup(module_id_t module_idP, int CC_id,unsigned char group_id){
module_id_t UE_id;
rnti_t rnti;
unsigned char nb_ue_in_pusch=0;
LTE_eNB_UE_stats* eNB_UE_stats;
for (UE_id=group_id;UE_id<NUMBER_OF_UE_MAX;UE_id+=eNB_mac_inst[module_idP].common_channels[CC_id].num_active_cba_groups) {
if (((rnti=eNB_mac_inst[module_idP][CC_id].UE_template[UE_id].rnti) !=0) &&
(eNB_mac_inst[module_idP][CC_id].UE_template[UE_id].ul_active==TRUE) &&
(mac_get_rrc_status(module_idP,1,UE_id) > RRC_CONNECTED)){
// && (UE_is_to_be_scheduled(module_idP,UE_id)))
// check at the phy enb_ue state for this rnti
if ((eNB_UE_stats= mac_xface->get_eNB_UE_stats(module_idP,CC_id,rnti)) != NULL){
if ((eNB_UE_stats->mode == PUSCH) && (UE_is_to_be_scheduled(module_idP,UE_id) == 0)){
nb_ue_in_pusch++;
}
}
}
}
return(nb_ue_in_pusch);
}
*/
#endif
void dump_ue_list(UE_list_t *listP, int ul_flag)
{
int j;
if ( ul_flag == 0 ) {
for (j=listP->head; j>=0; j=listP->next[j]) {
LOG_T(MAC,"node %d => %d\n",j,listP->next[j]);
}
} else {
for (j=listP->head_ul; j>=0; j=listP->next_ul[j]) {
LOG_T(MAC,"node %d => %d\n",j,listP->next_ul[j]);
}
}
}
int add_new_ue(module_id_t mod_idP, int cc_idP, rnti_t rntiP,int harq_pidP)
{
int UE_id;
int i, j;
UE_list_t *UE_list = &eNB_mac_inst[mod_idP].UE_list;
LOG_D(MAC,"[eNB %d, CC_id %d] Adding UE with rnti %x (next avail %d, num_UEs %d)\n",mod_idP,cc_idP,rntiP,UE_list->avail,UE_list->num_UEs);
dump_ue_list(UE_list,0);
for (i = 0; i < NUMBER_OF_UE_MAX; i++) {
if (UE_list->active[i] == TRUE) continue;
printf("MAC: new UE id %d rnti %x\n", i, rntiP);
UE_id = i;
UE_list->UE_template[cc_idP][UE_id].rnti = rntiP;
UE_list->UE_template[cc_idP][UE_id].configured = FALSE;
UE_list->numactiveCCs[UE_id] = 1;
UE_list->numactiveULCCs[UE_id] = 1;
UE_list->pCC_id[UE_id] = cc_idP;
UE_list->ordered_CCids[0][UE_id] = cc_idP;
UE_list->ordered_ULCCids[0][UE_id] = cc_idP;
UE_list->num_UEs++;
UE_list->active[UE_id] = TRUE;
memset((void*)&UE_list->UE_sched_ctrl[UE_id],0,sizeof(UE_sched_ctrl));
for (j=0; j<8; j++) {
UE_list->UE_template[cc_idP][UE_id].oldNDI[j] = (j==0)?1:0; // 1 because first transmission is with format1A (Msg4) for harq_pid 0
UE_list->UE_template[cc_idP][UE_id].oldNDI_UL[j] = (j==harq_pidP)?0:1; // 1st transmission is with Msg3;
}
eNB_ulsch_info[mod_idP][cc_idP][UE_id].status = S_UL_WAITING;
eNB_dlsch_info[mod_idP][cc_idP][UE_id].status = S_DL_WAITING;
LOG_D(MAC,"[eNB %d] Add UE_id %d on Primary CC_id %d: rnti %x\n",mod_idP,UE_id,cc_idP,rntiP);
dump_ue_list(UE_list,0);
return(UE_id);
}
printf("MAC: cannot add new UE for rnti %x\n", rntiP);
LOG_E(MAC,"error in add_new_ue(), could not find space in UE_list, Dumping UE list\n");
dump_ue_list(UE_list,0);
return(-1);
}
//------------------------------------------------------------------------------
int rrc_mac_remove_ue(module_id_t mod_idP,rnti_t rntiP)
//------------------------------------------------------------------------------
{
int i;
UE_list_t *UE_list = &eNB_mac_inst[mod_idP].UE_list;
int UE_id = find_UE_id(mod_idP,rntiP);
int pCC_id;
if (UE_id == -1) {
printf("MAC: cannot remove UE rnti %x\n", rntiP);
LOG_W(MAC,"rrc_mac_remove_ue: UE %x not found\n", rntiP);
mac_phy_remove_ue(mod_idP, rntiP);
return 0;
}
pCC_id = UE_PCCID(mod_idP,UE_id);
printf("MAC: remove UE %d rnti %x\n", UE_id, rntiP);
LOG_I(MAC,"Removing UE %d from Primary CC_id %d (rnti %x)\n",UE_id,pCC_id, rntiP);
dump_ue_list(UE_list,0);
UE_list->active[UE_id] = FALSE;
UE_list->num_UEs--;
// clear all remaining pending transmissions
UE_list->UE_template[pCC_id][UE_id].bsr_info[LCGID0] = 0;
UE_list->UE_template[pCC_id][UE_id].bsr_info[LCGID1] = 0;
UE_list->UE_template[pCC_id][UE_id].bsr_info[LCGID2] = 0;
UE_list->UE_template[pCC_id][UE_id].bsr_info[LCGID3] = 0;
UE_list->UE_template[pCC_id][UE_id].ul_SR = 0;
UE_list->UE_template[pCC_id][UE_id].rnti = NOT_A_RNTI;
UE_list->UE_template[pCC_id][UE_id].ul_active = FALSE;
eNB_ulsch_info[mod_idP][pCC_id][UE_id].rnti = NOT_A_RNTI;
eNB_ulsch_info[mod_idP][pCC_id][UE_id].status = S_UL_NONE;
eNB_dlsch_info[mod_idP][pCC_id][UE_id].rnti = NOT_A_RNTI;
eNB_dlsch_info[mod_idP][pCC_id][UE_id].status = S_DL_NONE;
mac_phy_remove_ue(mod_idP,rntiP);
// check if this has an RA process active
RA_TEMPLATE *RA_template;
for (i=0;i<NB_RA_PROC_MAX;i++) {
RA_template = (RA_TEMPLATE *)&eNB_mac_inst[mod_idP].common_channels[pCC_id].RA_template[i];
if (RA_template->rnti == rntiP){
RA_template->RA_active=FALSE;
RA_template->generate_rar=0;
RA_template->generate_Msg4=0;
RA_template->wait_ack_Msg4=0;
RA_template->timing_offset=0;
RA_template->RRC_timer=20;
RA_template->rnti = 0;
//break;
}
}
return 0;
}
int prev(UE_list_t *listP, int nodeP, int ul_flag)
{
int j;
if (ul_flag == 0 ) {
if (nodeP==listP->head) {
return(nodeP);
}
for (j=listP->head; j>=0; j=listP->next[j]) {
if (listP->next[j]==nodeP) {
return(j);
}
}
} else {
if (nodeP==listP->head_ul) {
return(nodeP);
}
for (j=listP->head_ul; j>=0; j=listP->next_ul[j]) {
if (listP->next_ul[j]==nodeP) {
return(j);
}
}
}
LOG_E(MAC,"error in prev(), could not find previous to %d in UE_list %s, should never happen, Dumping UE list\n",
nodeP, (ul_flag == 0)? "DL" : "UL");
dump_ue_list(listP, ul_flag);
return(-1);
}
void swap_UEs(UE_list_t *listP,int nodeiP, int nodejP, int ul_flag)
{
int prev_i,prev_j,next_i,next_j;
LOG_T(MAC,"Swapping UE %d,%d\n",nodeiP,nodejP);
dump_ue_list(listP,ul_flag);
prev_i = prev(listP,nodeiP,ul_flag);
prev_j = prev(listP,nodejP,ul_flag);
if ((prev_i<0) || (prev_j<0)) {
mac_xface->macphy_exit("swap_UEs: problem");
return; // not reached
}
if (ul_flag == 0) {
next_i = listP->next[nodeiP];
next_j = listP->next[nodejP];
} else {
next_i = listP->next_ul[nodeiP];
next_j = listP->next_ul[nodejP];
}
LOG_T(MAC,"[%s] next_i %d, next_i, next_j %d, head %d \n",
(ul_flag == 0)? "DL" : "UL",
next_i,next_j,listP->head);
if (ul_flag == 0 ) {
if (next_i == nodejP) { // case ... p(i) i j n(j) ... => ... p(j) j i n(i) ...
LOG_T(MAC,"Case ... p(i) i j n(j) ... => ... p(j) j i n(i) ...\n");
listP->next[nodeiP] = next_j;
listP->next[nodejP] = nodeiP;
if (nodeiP==listP->head) { // case i j n(j)
listP->head = nodejP;
} else {
listP->next[prev_i] = nodejP;
}
} else if (next_j == nodeiP) { // case ... p(j) j i n(i) ... => ... p(i) i j n(j) ...
LOG_T(MAC,"Case ... p(j) j i n(i) ... => ... p(i) i j n(j) ...\n");
listP->next[nodejP] = next_i;
listP->next[nodeiP] = nodejP;
if (nodejP==listP->head) { // case j i n(i)
listP->head = nodeiP;
} else {
listP->next[prev_j] = nodeiP;
}
} else { // case ... p(i) i n(i) ... p(j) j n(j) ...
listP->next[nodejP] = next_i;
listP->next[nodeiP] = next_j;
if (nodeiP==listP->head) {
LOG_T(MAC,"changing head to %d\n",nodejP);
listP->head=nodejP;
listP->next[prev_j] = nodeiP;
} else if (nodejP==listP->head) {
LOG_D(MAC,"changing head to %d\n",nodeiP);
listP->head=nodeiP;
listP->next[prev_i] = nodejP;
} else {
listP->next[prev_i] = nodejP;
listP->next[prev_j] = nodeiP;
}
}
} else { // ul_flag
if (next_i == nodejP) { // case ... p(i) i j n(j) ... => ... p(j) j i n(i) ...
LOG_T(MAC,"[UL] Case ... p(i) i j n(j) ... => ... p(j) j i n(i) ...\n");
listP->next_ul[nodeiP] = next_j;
listP->next_ul[nodejP] = nodeiP;
if (nodeiP==listP->head_ul) { // case i j n(j)
listP->head_ul = nodejP;
} else {
listP->next_ul[prev_i] = nodejP;
}
} else if (next_j == nodeiP) { // case ... p(j) j i n(i) ... => ... p(i) i j n(j) ...
LOG_T(MAC,"[UL]Case ... p(j) j i n(i) ... => ... p(i) i j n(j) ...\n");
listP->next_ul[nodejP] = next_i;
listP->next_ul[nodeiP] = nodejP;
if (nodejP==listP->head_ul) { // case j i n(i)
listP->head_ul = nodeiP;
} else {
listP->next_ul[prev_j] = nodeiP;
}
} else { // case ... p(i) i n(i) ... p(j) j n(j) ...
listP->next_ul[nodejP] = next_i;
listP->next_ul[nodeiP] = next_j;
if (nodeiP==listP->head_ul) {
LOG_T(MAC,"[UL]changing head to %d\n",nodejP);
listP->head_ul=nodejP;
listP->next_ul[prev_j] = nodeiP;
} else if (nodejP==listP->head_ul) {
LOG_T(MAC,"[UL]changing head to %d\n",nodeiP);
listP->head_ul=nodeiP;
listP->next_ul[prev_i] = nodejP;
} else {
listP->next_ul[prev_i] = nodejP;
listP->next_ul[prev_j] = nodeiP;
}
}
}
LOG_T(MAC,"After swap\n");
dump_ue_list(listP,ul_flag);
}
/*
#if defined(Rel10) || defined(Rel14)
unsigned char generate_mch_header( unsigned char *mac_header,
unsigned char num_sdus,
unsigned short *sdu_lengths,
unsigned char *sdu_lcids,
unsigned char msi,
unsigned char short_padding,
unsigned short post_padding) {
SCH_SUBHEADER_FIXED *mac_header_ptr = (SCH_SUBHEADER_FIXED *)mac_header;
uint8_t first_element=0,last_size=0,i;
uint8_t mac_header_control_elements[2*num_sdus],*ce_ptr;
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;
}
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;
}
// SUBHEADER for MSI CE
if (msi != 0) {// there is MSI MAC Control Element
if (first_element>0) {
mac_header_ptr->E = 1;
mac_header_ptr+=last_size;
}
else {
first_element = 1;
}
if (num_sdus*2 < 128) {
((SCH_SUBHEADER_SHORT *)mac_header_ptr)->R = 0;
((SCH_SUBHEADER_SHORT *)mac_header_ptr)->E = 0;
((SCH_SUBHEADER_SHORT *)mac_header_ptr)->F = 0;
((SCH_SUBHEADER_SHORT *)mac_header_ptr)->LCID = MCH_SCHDL_INFO;
((SCH_SUBHEADER_SHORT *)mac_header_ptr)->L = num_sdus*2;
last_size=2;
}
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 = MCH_SCHDL_INFO;
((SCH_SUBHEADER_LONG *)mac_header_ptr)->L = (num_sdus*2)&0x7fff;
last_size=3;
}
// Create the MSI MAC Control Element here
}
// SUBHEADER for MAC SDU (MCCH+MTCHs)
for (i=0;i<num_sdus;i++) {
if (first_element>0) {
mac_header_ptr->E = 1;
mac_header_ptr+=last_size;
}
else {
first_element = 1;
}
if (sdu_lengths[i] < 128) {
((SCH_SUBHEADER_SHORT *)mac_header_ptr)->R = 0;
((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;
}
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 = (unsigned short) sdu_lengths[i]&0x7fff;
last_size=3;
}
}
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++;
}
// Copy MSI Control Element to the end of the MAC Header if it presents
if ((ce_ptr-mac_header_control_elements) > 0) {
// printf("Copying %d bytes for control elements\n",ce_ptr-mac_header_control_elements);
memcpy((void*)mac_header_ptr,mac_header_control_elements,ce_ptr-mac_header_control_elements);
mac_header_ptr+=(unsigned char)(ce_ptr-mac_header_control_elements);
}
return((unsigned char*)mac_header_ptr - mac_header);
}
#endif
*/
void add_common_dci(DCI_PDU *DCI_pdu,
void *pdu,
rnti_t rnti,
unsigned char dci_size_bytes,
unsigned char aggregation,
unsigned char dci_size_bits,
unsigned char dci_fmt,
uint8_t ra_flag)
{
if (DCI_pdu->Num_dci == NUM_DCI_MAX) { printf("%s: DCI FULL, fatal!\n", __FUNCTION__); abort(); }
memcpy(&DCI_pdu->dci_alloc[DCI_pdu->Num_dci].dci_pdu[0],pdu,dci_size_bytes);
DCI_pdu->dci_alloc[DCI_pdu->Num_dci].dci_length = dci_size_bits;
DCI_pdu->dci_alloc[DCI_pdu->Num_dci].L = aggregation;
DCI_pdu->dci_alloc[DCI_pdu->Num_dci].rnti = rnti;
DCI_pdu->dci_alloc[DCI_pdu->Num_dci].format = dci_fmt;
DCI_pdu->dci_alloc[DCI_pdu->Num_dci].ra_flag = ra_flag;
DCI_pdu->dci_alloc[DCI_pdu->Num_dci].search_space = DCI_COMMON_SPACE;
DCI_pdu->Num_dci++;
LOG_D(MAC,"add common dci format %d for rnti %x \n",dci_fmt,rnti);
}
void add_ue_spec_dci(DCI_PDU *DCI_pdu,void *pdu,rnti_t rnti,unsigned char dci_size_bytes,unsigned char aggregation,unsigned char dci_size_bits,unsigned char dci_fmt,uint8_t ra_flag)
{
if (DCI_pdu->Num_dci == NUM_DCI_MAX) { printf("%s: DCI FULL, fatal!\n", __FUNCTION__); abort(); }
memcpy(&DCI_pdu->dci_alloc[DCI_pdu->Num_dci].dci_pdu[0],pdu,dci_size_bytes);
DCI_pdu->dci_alloc[DCI_pdu->Num_dci].dci_length = dci_size_bits;
DCI_pdu->dci_alloc[DCI_pdu->Num_dci].L = aggregation;
DCI_pdu->dci_alloc[DCI_pdu->Num_dci].rnti = rnti;
DCI_pdu->dci_alloc[DCI_pdu->Num_dci].format = dci_fmt;
DCI_pdu->dci_alloc[DCI_pdu->Num_dci].ra_flag = ra_flag;
DCI_pdu->dci_alloc[DCI_pdu->Num_dci].search_space = DCI_UE_SPACE;
DCI_pdu->Num_dci++;
LOG_D(MAC,"add ue specific dci format %d for rnti %x \n",dci_fmt,rnti);
}
// This has to be updated to include BSR information
uint8_t UE_is_to_be_scheduled(module_id_t module_idP,int CC_id,uint8_t UE_id)
{
UE_TEMPLATE *UE_template = &eNB_mac_inst[module_idP].UE_list.UE_template[CC_id][UE_id];
UE_sched_ctrl *UE_sched_ctl = &eNB_mac_inst[module_idP].UE_list.UE_sched_ctrl[UE_id];
// do not schedule UE if UL is not working
if (UE_sched_ctl->ul_failure_timer>0)
return(0);
if (UE_sched_ctl->ul_out_of_sync>0)
return(0);
LOG_D(MAC,"[eNB %d][PUSCH] Checking UL requirements UE %d/%x\n",module_idP,UE_id,UE_RNTI(module_idP,UE_id));
if ((UE_template->bsr_info[LCGID0]>0) ||
(UE_template->bsr_info[LCGID1]>0) ||
(UE_template->bsr_info[LCGID2]>0) ||
(UE_template->bsr_info[LCGID3]>0) ||
(UE_template->ul_SR>0) || // uplink scheduling request
((UE_sched_ctl->ul_inactivity_timer>20)&&
(UE_sched_ctl->ul_scheduled==0))|| // every 2 frames when RRC_CONNECTED
((UE_sched_ctl->ul_inactivity_timer>10)&&
(UE_sched_ctl->ul_scheduled==0)&&
(mac_eNB_get_rrc_status(module_idP,UE_RNTI(module_idP,UE_id)) < RRC_CONNECTED))) // every Frame when not RRC_CONNECTED
{
LOG_D(MAC,"[eNB %d][PUSCH] UE %d/%x should be scheduled\n",module_idP,UE_id,UE_RNTI(module_idP,UE_id));
return(1);
} else {
return(0);
}
}
uint32_t allocate_prbs(int UE_id,unsigned char nb_rb, uint32_t *rballoc)
{
int i;
uint32_t rballoc_dci=0;
unsigned char nb_rb_alloc=0;
for (i=0; i<(mac_xface->frame_parms->N_RB_DL-2); i+=2) {
if (((*rballoc>>i)&3)==0) {
*rballoc |= (3<<i);
rballoc_dci |= (1<<((12-i)>>1));
nb_rb_alloc+=2;
}
if (nb_rb_alloc==nb_rb) {
return(rballoc_dci);
}
}
if ((mac_xface->frame_parms->N_RB_DL&1)==1) {
if ((*rballoc>>(mac_xface->frame_parms->N_RB_DL-1)&1)==0) {
*rballoc |= (1<<(mac_xface->frame_parms->N_RB_DL-1));
rballoc_dci |= 1;//(1<<(mac_xface->frame_parms->N_RB_DL>>1));
}
}
return(rballoc_dci);
}
int get_bw_index(module_id_t module_id, uint8_t CC_id)
{
int bw_index=0;
LTE_DL_FRAME_PARMS* frame_parms = mac_xface->get_lte_frame_parms(module_id,CC_id);
switch (frame_parms->N_RB_DL) {
case 6: // 1.4 MHz
bw_index=0;
break;
case 25: // 5HMz
bw_index=1;
break;
case 50: // 10HMz
bw_index=2;
break;
case 100: // 20HMz
bw_index=3;
break;
default:
bw_index=1;
LOG_W(MAC,"[eNB %d] N_DL_RB %d unknown for CC_id %d, setting bw_index to 1\n", module_id, frame_parms->N_RB_DL, CC_id);
break;
}
return bw_index;
}
int get_min_rb_unit(module_id_t module_id, uint8_t CC_id)
{
int min_rb_unit=0;
LTE_DL_FRAME_PARMS* frame_parms = mac_xface->get_lte_frame_parms(module_id,CC_id);
switch (frame_parms->N_RB_DL) {
case 6: // 1.4 MHz
min_rb_unit=1;
break;
case 25: // 5HMz
min_rb_unit=2;
break;
case 50: // 10HMz
min_rb_unit=3;
break;
case 100: // 20HMz
min_rb_unit=4;
break;
default:
min_rb_unit=2;
LOG_W(MAC,"[eNB %d] N_DL_RB %d unknown for CC_id %d, setting min_rb_unit to 2\n",
module_id, frame_parms->N_RB_DL, CC_id);
break;
}
return min_rb_unit;
}
uint32_t allocate_prbs_sub(int nb_rb, uint8_t *rballoc)
{
int check=0;//check1=0,check2=0;
uint32_t rballoc_dci=0;
//uint8_t number_of_subbands=13;
LOG_T(MAC,"*****Check1RBALLOC****: %d%d%d%d (nb_rb %d,N_RBG %d)\n",
rballoc[3],rballoc[2],rballoc[1],rballoc[0],nb_rb,mac_xface->frame_parms->N_RBG);
while((nb_rb >0) && (check < mac_xface->frame_parms->N_RBG)) {
//printf("rballoc[%d] %d\n",check,rballoc[check]);
if(rballoc[check] == 1) {
rballoc_dci |= (1<<((mac_xface->frame_parms->N_RBG-1)-check));
switch (mac_xface->frame_parms->N_RB_DL) {
case 6:
nb_rb--;
break;
case 25:
if ((check == mac_xface->frame_parms->N_RBG-1)) {
nb_rb--;
} else {
nb_rb-=2;
}
break;
case 50:
if ((check == mac_xface->frame_parms->N_RBG-1)) {
nb_rb-=2;
} else {
nb_rb-=3;
}
break;
case 100:
nb_rb-=4;
break;
}
}
// printf("rb_alloc %x\n",rballoc_dci);
check = check+1;
// check1 = check1+2;
}
// rballoc_dci = (rballoc_dci)&(0x1fff);
LOG_T(MAC,"*********RBALLOC : %x\n",rballoc_dci);
// exit(-1);
return (rballoc_dci);
}
int get_nb_subband(void)
{
int nb_sb=0;
switch (mac_xface->frame_parms->N_RB_DL) {
case 6:
nb_sb=0;
break;
case 15:
nb_sb = 4; // sb_size =4
case 25:
nb_sb = 7; // sb_size =4, 1 sb with 1PRB, 6 with 2 RBG, each has 2 PRBs
break;
case 50: // sb_size =6
nb_sb = 9;
break;
case 75: // sb_size =8
nb_sb = 10;
break;
case 100: // sb_size =8 , 1 sb with 1 RBG + 12 sb with 2RBG, each RBG has 4 PRBs
nb_sb = 13;
break;
default:
nb_sb=0;
break;
}
return nb_sb;
}
void init_CCE_table(int module_idP,int CC_idP)
{
memset(eNB_mac_inst[module_idP].CCE_table[CC_idP],0,800*sizeof(int));
}
int get_nCCE_offset(int *CCE_table,
const unsigned char L,
const int nCCE,
const int common_dci,
const unsigned short rnti,
const unsigned char subframe)
{
int search_space_free,m,nb_candidates = 0,l,i;
unsigned int Yk;
/*
printf("CCE Allocation: ");
for (i=0;i<nCCE;i++)
printf("%d.",CCE_table[i]);
printf("\n");
*/
if (common_dci == 1) {
// check CCE(0 ... L-1)
nb_candidates = (L==4) ? 4 : 2;
nb_candidates = min(nb_candidates,nCCE/L);
// printf("Common DCI nb_candidates %d, L %d\n",nb_candidates,L);
for (m = nb_candidates-1 ; m >=0 ; m--) {
search_space_free = 1;
for (l=0; l<L; l++) {
// printf("CCE_table[%d] %d\n",(m*L)+l,CCE_table[(m*L)+l]);
if (CCE_table[(m*L) + l] == 1) {
search_space_free = 0;
break;
}
}
if (search_space_free == 1) {
// printf("returning %d\n",m*L);
for (l=0; l<L; l++)
CCE_table[(m*L)+l]=1;
return(m*L);
}
}
return(-1);
} else { // Find first available in ue specific search space
// according to procedure in Section 9.1.1 of 36.213 (v. 8.6)
// compute Yk
Yk = (unsigned int)rnti;
for (i=0; i<=subframe; i++)
Yk = (Yk*39827)%65537;
Yk = Yk % (nCCE/L);
switch (L) {
case 1:
case 2:
nb_candidates = 6;
break;
case 4:
case 8:
nb_candidates = 2;
break;
default:
DevParam(L, nCCE, rnti);
break;
}
LOG_D(MAC,"rnti %x, Yk = %d, nCCE %d (nCCE/L %d),nb_cand %d\n",rnti,Yk,nCCE,nCCE/L,nb_candidates);
for (m = 0 ; m < nb_candidates ; m++) {
search_space_free = 1;
for (l=0; l<L; l++) {
int cce = (((Yk+m)%(nCCE/L))*L) + l;
if (cce >= nCCE || CCE_table[cce] == 1) {
search_space_free = 0;
break;
}
}
if (search_space_free == 1) {
for (l=0; l<L; l++)
CCE_table[(((Yk+m)%(nCCE/L))*L)+l]=1;
return(((Yk+m)%(nCCE/L))*L);
}
}
return(-1);
}
}
void dump_CCE_table(int *CCE_table,const int nCCE,const unsigned short rnti,const int subframe,int L) {
int nb_candidates = 0,i;
unsigned int Yk;
printf("CCE 0: ");
for (i=0;i<nCCE;i++) {
printf("%1d.",CCE_table[i]);
if ((i&7) == 7)
printf("\n CCE %d: ",i);
}
Yk = (unsigned int)rnti;
for (i=0; i<=subframe; i++)
Yk = (Yk*39827)%65537;
Yk = Yk % (nCCE/L);
switch (L) {
case 1:
case 2:
nb_candidates = 6;
break;
case 4:
case 8:
nb_candidates = 2;
break;
default:
DevParam(L, nCCE, rnti);
break;
}
printf("rnti %x, Yk*L = %d, nCCE %d (nCCE/L %d),nb_cand*L %d\n",rnti,Yk*L,nCCE,nCCE/L,nb_candidates*L);
}
// Allocate the CCEs
int allocate_CCEs(int module_idP,
int CC_idP,
int subframeP,
int test_onlyP) {
int *CCE_table = eNB_mac_inst[module_idP].CCE_table[CC_idP];
DCI_PDU *DCI_pdu = &eNB_mac_inst[module_idP].common_channels[CC_idP].DCI_pdu;
int nCCE_max = mac_xface->get_nCCE_max(module_idP,CC_idP,1,subframeP);
int fCCE;
int i,j;
DCI_ALLOC_t *dci_alloc;
int nCCE=0;
LOG_D(MAC,"Allocate CCEs subframe %d, test %d : (Num_dci %d)\n",subframeP,test_onlyP,DCI_pdu->Num_dci);
DCI_pdu->num_pdcch_symbols=1;
try_again:
init_CCE_table(module_idP,CC_idP);
nCCE=0;
for (i=0;i<DCI_pdu->Num_dci;i++) {
dci_alloc = &DCI_pdu->dci_alloc[i];
LOG_D(MAC,"Trying to allocate DCI %d/%d : rnti %x, aggreg %d nCCE %d / %d (num_pdcch_symbols %d)\n",
i,DCI_pdu->Num_dci,
dci_alloc->rnti,1<<dci_alloc->L,
nCCE,nCCE_max,DCI_pdu->num_pdcch_symbols);
if (nCCE + (1<<dci_alloc->L) > nCCE_max)
goto failed;
// number of CCEs left can potentially hold this allocation
fCCE = get_nCCE_offset(CCE_table,
1<<(dci_alloc->L),
nCCE_max,
dci_alloc->search_space == DCI_COMMON_SPACE ? 1 : 0,
dci_alloc->rnti,
subframeP);
if (fCCE == -1) {
failed:
if (DCI_pdu->num_pdcch_symbols == 3) {
LOG_I(MAC,"subframe %d: Dropping Allocation for RNTI %x (DCI %d/%d)\n",
subframeP,dci_alloc->rnti,
i, DCI_pdu->Num_dci);
for (j=0;j<=i;j++){
LOG_I(MAC,"DCI %d/%d : rnti %x dci format %d, aggreg %d nCCE %d / %d (num_pdcch_symbols %d)\n",
j,DCI_pdu->Num_dci,
DCI_pdu->dci_alloc[j].rnti,DCI_pdu->dci_alloc[j].format,
1<<DCI_pdu->dci_alloc[j].L,
nCCE,nCCE_max,DCI_pdu->num_pdcch_symbols);
}
//dump_CCE_table(CCE_table,nCCE_max,subframeP,dci_alloc->rnti,1<<dci_alloc->L);
goto fatal;
}
DCI_pdu->num_pdcch_symbols++;
nCCE_max = mac_xface->get_nCCE_max(module_idP,CC_idP,DCI_pdu->num_pdcch_symbols,subframeP);
goto try_again;
} // fCCE==-1
// the allocation is feasible, rnti rule passes
nCCE += (1<<dci_alloc->L);
LOG_D(MAC,"Allocating at nCCE %d\n",fCCE);
if (test_onlyP == 0) {
dci_alloc->firstCCE=fCCE;
LOG_D(MAC,"Allocate CCEs subframe %d, test %d\n",subframeP,test_onlyP);
}
} // for i = 0 ... num_dcis
return 0;
fatal:
return -1;
}
boolean_t CCE_allocation_infeasible(int module_idP,
int CC_idP,
int common_flag,
int subframe,
int aggregation,
int rnti)
{
DCI_PDU *DCI_pdu = &eNB_mac_inst[module_idP].common_channels[CC_idP].DCI_pdu;
//DCI_ALLOC_t *dci_alloc;
int ret;
boolean_t res=FALSE;
if (DCI_pdu->Num_dci == NUM_DCI_MAX) return TRUE;
DCI_pdu->dci_alloc[DCI_pdu->Num_dci].rnti = rnti;
DCI_pdu->dci_alloc[DCI_pdu->Num_dci].L = aggregation;
DCI_pdu->dci_alloc[DCI_pdu->Num_dci].search_space = common_flag == 1 ? DCI_COMMON_SPACE : DCI_UE_SPACE;
DCI_pdu->Num_dci++;
ret = allocate_CCEs(module_idP,CC_idP,subframe,1);
if (ret==-1)
res = TRUE;
DCI_pdu->Num_dci--;
return res;
}
void SR_indication(module_id_t mod_idP, int cc_idP, frame_t frameP, rnti_t rntiP, sub_frame_t subframeP)
{
int UE_id = find_UE_id(mod_idP, rntiP);
UE_list_t *UE_list = &eNB_mac_inst[mod_idP].UE_list;
if (UE_id != -1) {
if (mac_eNB_get_rrc_status(mod_idP,UE_RNTI(mod_idP,UE_id)) < RRC_CONNECTED)
LOG_I(MAC,"[eNB %d][SR %x] Frame %d subframeP %d Signaling SR for UE %d on CC_id %d\n",mod_idP,rntiP,frameP,subframeP, UE_id,cc_idP);
UE_list->UE_template[cc_idP][UE_id].ul_SR = 1;
UE_list->UE_template[cc_idP][UE_id].ul_active = TRUE;
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_SR_INDICATION,1);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_SR_INDICATION,0);
} else {
// AssertFatal(0, "find_UE_id(%u,rnti %d) not found", enb_mod_idP, rntiP);
// AssertError(0, 0, "Frame %d: find_UE_id(%u,rnti %d) not found\n", frameP, enb_mod_idP, rntiP);
LOG_D(MAC,"[eNB %d][SR %x] Frame %d subframeP %d Signaling SR for UE %d (unknown UEid) on CC_id %d\n",mod_idP,rntiP,frameP,subframeP, UE_id,cc_idP);
}
}
void UL_failure_indication(module_id_t mod_idP, int cc_idP, frame_t frameP, rnti_t rntiP, sub_frame_t subframeP)
{
int UE_id = find_UE_id(mod_idP, rntiP);
UE_list_t *UE_list = &eNB_mac_inst[mod_idP].UE_list;
if (UE_id != -1) {
LOG_I(MAC,"[eNB %d][UE %d/%x] Frame %d subframeP %d Signaling UL Failure for UE %d on CC_id %d (timer %d)\n",
mod_idP,UE_id,rntiP,frameP,subframeP, UE_id,cc_idP,
UE_list->UE_sched_ctrl[UE_id].ul_failure_timer);
if (UE_list->UE_sched_ctrl[UE_id].ul_failure_timer == 0)
UE_list->UE_sched_ctrl[UE_id].ul_failure_timer=1;
} else {
// AssertFatal(0, "find_UE_id(%u,rnti %d) not found", enb_mod_idP, rntiP);
// AssertError(0, 0, "Frame %d: find_UE_id(%u,rnti %d) not found\n", frameP, enb_mod_idP, rntiP);
LOG_W(MAC,"[eNB %d][SR %x] Frame %d subframeP %d Signaling UL Failure for UE %d (unknown UEid) on CC_id %d\n",mod_idP,rntiP,frameP,subframeP, UE_id,cc_idP);
}
}
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