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8ffe5b4920e19042fb04b2282b8e8fb8a5fef0b7
openairinterface5g/openair2/LAYER2/MAC/pre_processor.c
T
Robert Schmidt 8ffe5b4920 Rename UE_list_t to UE_info_t, UE_list_t separate struct 
UE_list_t is now used as a separate list. It can be e.g. used in the
scheduler to mark groups of users. The original UE_list_t is renamed to
UE_info_t to reflect that it is a container for information about UEs.
2020-04-01 10:47:02 +02:00

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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 pre_processor.c
* \brief eNB scheduler preprocessing fuction prior to scheduling
* \author Navid Nikaein and Ankit Bhamri
* \date 2013 - 2014
* \email navid.nikaein@eurecom.fr
* \version 1.0
* @ingroup _mac
*/
#define _GNU_SOURCE
#include <stdlib.h>
#include "assertions.h"
#include "LAYER2/MAC/mac.h"
#include "LAYER2/MAC/mac_proto.h"
#include "LAYER2/MAC/mac_extern.h"
#include "common/utils/LOG/log.h"
#include "common/utils/LOG/vcd_signal_dumper.h"
#include "UTIL/OPT/opt.h"
#include "OCG.h"
#include "OCG_extern.h"
#include "RRC/LTE/rrc_extern.h"
#include "RRC/L2_INTERFACE/openair_rrc_L2_interface.h"
#include "rlc.h"
#include "PHY/LTE_TRANSPORT/transport_common_proto.h"
#include "common/ran_context.h"
extern RAN_CONTEXT_t RC;
#define DEBUG_eNB_SCHEDULER 1
#define DEBUG_HEADER_PARSING 1
void
sort_ue_ul(module_id_t module_idP,
int slice_idx,
int sched_frameP,
sub_frame_t sched_subframeP,
rnti_t *rntiTable);
// This function stores the downlink buffer for all the logical channels
void
store_dlsch_buffer(module_id_t Mod_id,
frame_t frameP,
sub_frame_t subframeP) {
UE_info_t *UE_info = &RC.mac[Mod_id]->UE_info;
for (int UE_id = 0; UE_id < MAX_MOBILES_PER_ENB; UE_id++) {
if (UE_info->active[UE_id] != TRUE)
continue;
/* TODO why UE_template per CC? */
UE_TEMPLATE *UE_template = &UE_info->UE_template[UE_PCCID(Mod_id, UE_id)][UE_id];
UE_template->dl_buffer_total = 0;
UE_template->dl_pdus_total = 0;
const rnti_t rnti = UE_RNTI(Mod_id, UE_id);
for (int lcid = 0; lcid < MAX_NUM_LCID; ++lcid) { // loop over all the logical channels
const mac_rlc_status_resp_t rlc_status = mac_rlc_status_ind(Mod_id,
rnti,
Mod_id,
frameP,
subframeP,
ENB_FLAG_YES,
MBMS_FLAG_NO,
lcid,
0,
0,
0
);
UE_template->dl_buffer_info[lcid] = rlc_status.bytes_in_buffer; //storing the dlsch buffer for each logical channel
UE_template->dl_pdus_in_buffer[lcid] = rlc_status.pdus_in_buffer;
UE_template->dl_buffer_head_sdu_creation_time[lcid] = rlc_status.head_sdu_creation_time;
UE_template->dl_buffer_head_sdu_creation_time_max =
cmax(UE_template->dl_buffer_head_sdu_creation_time_max, rlc_status.head_sdu_creation_time);
UE_template->dl_buffer_head_sdu_remaining_size_to_send[lcid] = rlc_status.head_sdu_remaining_size_to_send;
UE_template->dl_buffer_head_sdu_is_segmented[lcid] = rlc_status.head_sdu_is_segmented;
UE_template->dl_buffer_total += UE_template->dl_buffer_info[lcid]; //storing the total dlsch buffer
UE_template->dl_pdus_total += UE_template->dl_pdus_in_buffer[lcid];
#ifdef DEBUG_eNB_SCHEDULER
/* note for dl_buffer_head_sdu_remaining_size_to_send[lcid] :
* 0 if head SDU has not been segmented (yet), else remaining size not already segmented and sent
*/
if (UE_template->dl_buffer_info[lcid] > 0)
LOG_D(MAC,
"[eNB %d] Frame %d Subframe %d : RLC status for UE %d in LCID%d: total of %d pdus and size %d, head sdu queuing time %d, remaining size %d, is segmeneted %d \n",
Mod_id, frameP,
subframeP, UE_id, lcid, UE_template->dl_pdus_in_buffer[lcid],
UE_template->dl_buffer_info[lcid],
UE_template->dl_buffer_head_sdu_creation_time[lcid],
UE_template->dl_buffer_head_sdu_remaining_size_to_send[lcid],
UE_template->dl_buffer_head_sdu_is_segmented[lcid]);
#endif
}
if (UE_template->dl_buffer_total > 0)
LOG_D(MAC,
"[eNB %d] Frame %d Subframe %d : RLC status for UE %d : total DL buffer size %d and total number of pdu %d \n",
Mod_id, frameP, subframeP, UE_id,
UE_template->dl_buffer_total,
UE_template->dl_pdus_total);
}
}
// This function returns the estimated number of RBs required to send the full
// buffer
int get_rbs_required(module_id_t Mod_id,
int CC_id,
int UE_id) {
const UE_info_t *UE_info = &RC.mac[Mod_id]->UE_info;
if (UE_info->UE_template[CC_id][UE_id].dl_buffer_total == 0)
return 0;
const int dlsch_mcs1 = cqi_to_mcs[UE_info->UE_sched_ctrl[UE_id].dl_cqi[CC_id]];
const int min_rb_unit = get_min_rb_unit(Mod_id, CC_id);
int nb_rbs_required = min_rb_unit;
/* calculating required number of RBs for each UE */
int TBS = get_TBS_DL(dlsch_mcs1, nb_rbs_required);
while (TBS < UE_info->UE_template[CC_id][UE_id].dl_buffer_total) {
nb_rbs_required += min_rb_unit;
TBS = get_TBS_DL(dlsch_mcs1, nb_rbs_required);
}
return nb_rbs_required;
}
void
assign_rbs_required(module_id_t Mod_id,
int CC_id,
uint16_t nb_rbs_required[MAX_MOBILES_PER_ENB]) {
UE_info_t *UE_info = &RC.mac[Mod_id]->UE_info;
for (int UE_id = UE_info->list.head; UE_id >= 0; UE_id = UE_info->list.next[UE_id]) {
nb_rbs_required[UE_id] = get_rbs_required(Mod_id, CC_id, UE_id);
// TODO: the following should not be here
UE_info->eNB_UE_stats[CC_id][UE_id].dlsch_mcs1 = cqi_to_mcs[UE_info->UE_sched_ctrl[UE_id].dl_cqi[CC_id]];
}
}
int
maxround_ul(module_id_t Mod_id, uint16_t rnti, int sched_frame,
sub_frame_t sched_subframe) {
uint8_t round, round_max = 0, UE_id;
int CC_id, harq_pid;
UE_info_t *UE_info = &RC.mac[Mod_id]->UE_info;
COMMON_channels_t *cc;
for (CC_id = 0; CC_id < RC.nb_mac_CC[Mod_id]; CC_id++) {
cc = &RC.mac[Mod_id]->common_channels[CC_id];
UE_id = find_UE_id(Mod_id, rnti);
if(UE_id == -1)
continue;
harq_pid = subframe2harqpid(cc, sched_frame, sched_subframe);
round = UE_info->UE_sched_ctrl[UE_id].round_UL[CC_id][harq_pid];
if (round > round_max) {
round_max = round;
}
}
return round_max;
}
void dlsch_scheduler_pre_processor_accounting(module_id_t Mod_id,
int CC_id,
frame_t frameP,
sub_frame_t subframeP,
uint16_t nb_rbs_required[MAX_MOBILES_PER_ENB],
uint16_t nb_rbs_accounted[MAX_MOBILES_PER_ENB]) {
uint16_t available_rbs = to_prb(RC.mac[Mod_id]->common_channels[CC_id].mib->message.dl_Bandwidth);
uint8_t rbs_retx = 0;
uint16_t average_rbs_per_user = 0;
int ue_count_newtx = 0;
int ue_count_retx = 0;
UE_info_t *UE_info = &RC.mac[Mod_id]->UE_info;
// Find total UE count, and account the RBs required for retransmissions
for (int UE_id = UE_info->list.head; UE_id >= 0; UE_id = UE_info->list.next[UE_id]) {
const rnti_t rnti = UE_RNTI(Mod_id, UE_id);
if (rnti == NOT_A_RNTI) continue;
if (UE_info->UE_sched_ctrl[UE_id].ul_out_of_sync == 1) continue;
const COMMON_channels_t *cc = &RC.mac[Mod_id]->common_channels[CC_id];
const uint8_t harq_pid = frame_subframe2_dl_harq_pid(cc->tdd_Config,frameP,subframeP);
const uint8_t round = UE_info->UE_sched_ctrl[UE_id].round[CC_id][harq_pid];
// retransmission
if (round != 8) {
nb_rbs_required[UE_id] = UE_info->UE_template[CC_id][UE_id].nb_rb[harq_pid];
rbs_retx += nb_rbs_required[UE_id];
ue_count_retx++;
} else {
ue_count_newtx++;
}
}
available_rbs = available_rbs - rbs_retx;
const int min_rb_unit = get_min_rb_unit(Mod_id, CC_id);
if (ue_count_newtx == 0) {
average_rbs_per_user = 0;
} else if (min_rb_unit*ue_count_newtx <= available_rbs) {
average_rbs_per_user = (uint16_t)floor(available_rbs/ue_count_newtx);
} else {
// consider the total number of use that can be scheduled UE
average_rbs_per_user = (uint16_t)min_rb_unit;
}
for (int UE_id = UE_info->list.head; UE_id >= 0; UE_id = UE_info->list.next[UE_id]) {
const rnti_t rnti = UE_RNTI(Mod_id, UE_id);
if (rnti == NOT_A_RNTI) continue;
if (UE_info->UE_sched_ctrl[UE_id].ul_out_of_sync == 1) continue;
const COMMON_channels_t *cc = &RC.mac[Mod_id]->common_channels[CC_id];
const uint8_t harq_pid = frame_subframe2_dl_harq_pid(cc->tdd_Config,frameP,subframeP);
const uint8_t round = UE_info->UE_sched_ctrl[UE_id].round[CC_id][harq_pid];
/* TODO the first seems unnecessary, remove it */
if (mac_eNB_get_rrc_status(Mod_id, rnti) < RRC_RECONFIGURED || round != 8)
nb_rbs_accounted[UE_id] = nb_rbs_required[UE_id];
else
nb_rbs_accounted[UE_id] = cmin(average_rbs_per_user, nb_rbs_required[UE_id]);
}
}
void dlsch_scheduler_pre_processor_positioning(module_id_t Mod_id,
int CC_id,
uint16_t nb_rbs_required[MAX_MOBILES_PER_ENB],
uint16_t nb_rbs_accounted[MAX_MOBILES_PER_ENB],
uint8_t rballoc_sub[N_RBG_MAX]) {
UE_info_t *UE_info = &RC.mac[Mod_id]->UE_info;
for (int UE_id = UE_info->list.head; UE_id >= 0; UE_id = UE_info->list.next[UE_id]) {
if (UE_RNTI(Mod_id, UE_id) == NOT_A_RNTI) continue;
if (UE_info->UE_sched_ctrl[UE_id].ul_out_of_sync == 1) continue;
dlsch_scheduler_pre_processor_allocate(Mod_id,
UE_id,
CC_id,
nb_rbs_required[UE_id],
&nb_rbs_accounted[UE_id],
rballoc_sub);
}
}
// This function assigns pre-available RBS to each UE in specified sub-bands before scheduling is done
void
dlsch_scheduler_pre_processor(module_id_t Mod_id,
int CC_id,
frame_t frameP,
sub_frame_t subframeP) {
uint8_t rballoc_sub[N_RBG_MAX];
memset(rballoc_sub, 0, sizeof(rballoc_sub));
// Initialize scheduling information for all active UEs
dlsch_scheduler_pre_processor_reset(Mod_id,
CC_id,
rballoc_sub);
store_dlsch_buffer(Mod_id,
frameP,
subframeP);
// Calculate the number of RBs required by each UE on the basis of logical channel's buffer
uint16_t nb_rbs_required[MAX_MOBILES_PER_ENB];
memset(nb_rbs_required, 0, sizeof(nb_rbs_required));
assign_rbs_required(Mod_id,
CC_id,
nb_rbs_required);
// Decide the number of RBs to allocate
uint16_t nb_rbs_accounted[MAX_MOBILES_PER_ENB];
memset(nb_rbs_accounted, 0, sizeof(nb_rbs_accounted));
dlsch_scheduler_pre_processor_accounting(Mod_id,
CC_id,
frameP,
subframeP,
nb_rbs_required,
nb_rbs_accounted);
// POSITIONING
// This procedure does the main allocation of the RBs
dlsch_scheduler_pre_processor_positioning(Mod_id,
CC_id,
nb_rbs_required,
nb_rbs_accounted,
rballoc_sub);
const UE_info_t *UE_info = &RC.mac[Mod_id]->UE_info;
const COMMON_channels_t *cc = &RC.mac[Mod_id]->common_channels[CC_id];
const int N_RBG = to_rbg(cc->mib->message.dl_Bandwidth);
for (int UE_id = UE_info->list.head; UE_id >= 0; UE_id = UE_info->list.next[UE_id]) {
const UE_sched_ctrl_t *ue_sched_ctrl = &UE_info->UE_sched_ctrl[UE_id];
if (ue_sched_ctrl->pre_nb_available_rbs[CC_id] == 0)
continue;
char s[101];
for (int i = 0; i < N_RBG; i++)
sprintf(&s[i*2], " %d", ue_sched_ctrl->rballoc_sub_UE[CC_id][i]);
LOG_D(MAC,
"%d/%d allocation UE %d RNTI %x:%s, total %d, MCS %d\n",
frameP,
subframeP,
UE_id,
UE_info->UE_template[CC_id][UE_id].rnti,
s,
ue_sched_ctrl->pre_nb_available_rbs[CC_id],
UE_info->eNB_UE_stats[CC_id][UE_id].dlsch_mcs1);
}
}
void
dlsch_scheduler_pre_processor_reset(module_id_t module_idP,
int CC_id,
uint8_t rballoc_sub[N_RBG_MAX]) {
UE_info_t *UE_info = &RC.mac[module_idP]->UE_info;
for (int UE_id = 0; UE_id < MAX_MOBILES_PER_ENB; ++UE_id) {
UE_sched_ctrl_t *ue_sched_ctl = &UE_info->UE_sched_ctrl[UE_id];
const rnti_t rnti = UE_RNTI(module_idP, UE_id);
if (rnti == NOT_A_RNTI)
continue;
if (UE_info->active[UE_id] != TRUE)
continue;
// initialize harq_pid and round
if (ue_sched_ctl->ta_timer)
ue_sched_ctl->ta_timer--;
ue_sched_ctl->pre_nb_available_rbs[CC_id] = 0;
ue_sched_ctl->dl_pow_off[CC_id] = 2;
for (int i = 0; i < sizeof(ue_sched_ctl->rballoc_sub_UE[CC_id])/sizeof(unsigned char); i++) {
ue_sched_ctl->rballoc_sub_UE[CC_id][i] = 0;
}
}
const int N_RB_DL = to_prb(RC.mac[module_idP]->common_channels[CC_id].mib->message.dl_Bandwidth);
const int RBGsize = get_min_rb_unit(module_idP, CC_id);
const uint8_t *vrb_map = RC.mac[module_idP]->common_channels[CC_id].vrb_map;
// Check for SI-RNTI, RA-RNTI or P-RNTI allocations in VRB map and
// initialize subbands accordly
for (int i = 0; i < N_RB_DL; i++) {
if (vrb_map[i] != 0)
rballoc_sub[i/RBGsize] = 1;
}
}
void
dlsch_scheduler_pre_processor_allocate(module_id_t Mod_id,
int UE_id,
uint8_t CC_id,
uint16_t nb_rbs_required,
uint16_t *nb_rbs_remaining,
uint8_t rballoc_sub[N_RBG_MAX]) {
UE_sched_ctrl_t *ue_sched_ctl = &RC.mac[Mod_id]->UE_info.UE_sched_ctrl[UE_id];
const int N_RBG = to_rbg(RC.mac[Mod_id]->common_channels[CC_id].mib->message.dl_Bandwidth);
const int N_RB_DL = to_prb(RC.mac[Mod_id]->common_channels[CC_id].mib->message.dl_Bandwidth);
const int min_rb_unit = get_min_rb_unit(Mod_id, CC_id);
for (int i = 0; i < N_RBG; i++) {
if (rballoc_sub[i] != 0) continue;
if (ue_sched_ctl->rballoc_sub_UE[CC_id][i] != 0) continue;
if (*nb_rbs_remaining <= 0) continue;
if (ue_sched_ctl->pre_nb_available_rbs[CC_id] >= nb_rbs_required) continue;
if (ue_sched_ctl->dl_pow_off[CC_id] == 0) continue;
if ((i == N_RBG - 1) && ((N_RB_DL == 25) || (N_RB_DL == 50))) {
// Allocating last, smaller RBG
if (*nb_rbs_remaining >= min_rb_unit - 1) {
rballoc_sub[i] = 1;
ue_sched_ctl->rballoc_sub_UE[CC_id][i] = 1;
*nb_rbs_remaining -= min_rb_unit + 1;
ue_sched_ctl->pre_nb_available_rbs[CC_id] = ue_sched_ctl->pre_nb_available_rbs[CC_id] + min_rb_unit - 1;
}
} else {
// Allocating a standard-sized RBG
if (*nb_rbs_remaining >= min_rb_unit) {
rballoc_sub[i] = 1;
ue_sched_ctl->rballoc_sub_UE[CC_id][i] = 1;
*nb_rbs_remaining -= min_rb_unit;
ue_sched_ctl->pre_nb_available_rbs[CC_id] = ue_sched_ctl->pre_nb_available_rbs[CC_id] + min_rb_unit;
}
}
}
}
/// ULSCH PRE_PROCESSOR
void ulsch_scheduler_pre_processor(module_id_t module_idP,
int slice_idx,
int frameP,
sub_frame_t subframeP,
int sched_frameP,
unsigned char sched_subframeP,
uint16_t *first_rb) {
int UE_id;
uint16_t n;
uint8_t CC_id, harq_pid;
uint16_t nb_allocated_rbs[NFAPI_CC_MAX][MAX_MOBILES_PER_ENB];
uint16_t total_allocated_rbs[NFAPI_CC_MAX];
uint16_t average_rbs_per_user[NFAPI_CC_MAX];
int16_t total_remaining_rbs[NFAPI_CC_MAX];
uint16_t total_ue_count[NFAPI_CC_MAX];
eNB_MAC_INST *eNB = RC.mac[module_idP];
UE_info_t *UE_info = &eNB->UE_info;
slice_info_t *sli = &eNB->slice_info;
UE_TEMPLATE *UE_template = 0;
UE_sched_ctrl_t *ue_sched_ctl;
int N_RB_UL = 0;
uint16_t available_rbs, first_rb_offset;
rnti_t rntiTable[MAX_MOBILES_PER_ENB];
// sort ues
LOG_D(MAC, "In ulsch_preprocessor: sort ue \n");
sort_ue_ul(module_idP, slice_idx, sched_frameP, sched_subframeP, rntiTable);
// maximize MCS and then allocate required RB according to the buffer occupancy with the limit of max available UL RB
LOG_D(MAC, "In ulsch_preprocessor: assign max mcs min rb\n");
assign_max_mcs_min_rb(module_idP, slice_idx, frameP, subframeP, first_rb);
// we need to distribute RBs among UEs
// step1: reset the vars
uint8_t CC_nb = (uint8_t) RC.nb_mac_CC[module_idP];
for (CC_id = 0; CC_id < CC_nb; CC_id++) {
total_allocated_rbs[CC_id] = 0;
total_remaining_rbs[CC_id] = 0;
average_rbs_per_user[CC_id] = 0;
total_ue_count[CC_id] = 0;
}
// Step 1.5: Calculate total_ue_count
for (UE_id = UE_info->list.head; UE_id >= 0; UE_id = UE_info->list.next[UE_id]) {
// This is not the actual CC_id in the list
for (n = 0; n < UE_info->numactiveULCCs[UE_id]; n++) {
CC_id = UE_info->ordered_ULCCids[n][UE_id];
UE_template = &UE_info->UE_template[CC_id][UE_id];
if (UE_template->pre_allocated_nb_rb_ul[slice_idx] > 0) {
total_ue_count[CC_id]++;
}
}
}
// step 2: calculate the average rb per UE
LOG_D(MAC, "In ulsch_preprocessor: step2 \n");
for (UE_id = UE_info->list.head; UE_id >= 0; UE_id = UE_info->list.next[UE_id]) {
if (UE_info->UE_template[CC_id][UE_id].rach_resource_type > 0) continue;
LOG_D(MAC, "In ulsch_preprocessor: handling UE %d/%x\n",
UE_id,
rntiTable[UE_id]);
for (n = 0; n < UE_info->numactiveULCCs[UE_id]; n++) {
// This is the actual CC_id in the list
CC_id = UE_info->ordered_ULCCids[n][UE_id];
LOG_D(MAC, "In ulsch_preprocessor: handling UE %d/%x CCid %d\n",
UE_id,
rntiTable[UE_id],
CC_id);
/*
if((mac_xface->get_nCCE_max(module_idP,CC_id,3,subframeP) - nCCE_to_be_used[CC_id]) > (1<<aggregation)) {
nCCE_to_be_used[CC_id] = nCCE_to_be_used[CC_id] + (1<<aggregation);
max_num_ue_to_be_scheduled+=1;
} */
N_RB_UL = to_prb(eNB->common_channels[CC_id].ul_Bandwidth);
ue_sched_ctl = &UE_info->UE_sched_ctrl[UE_id];
ue_sched_ctl->max_rbs_allowed_slice_uplink[CC_id][slice_idx] =
nb_rbs_allowed_slice(sli->ul[slice_idx].pct, N_RB_UL);
first_rb_offset = UE_info->first_rb_offset[CC_id][slice_idx];
available_rbs =
cmin(ue_sched_ctl->max_rbs_allowed_slice_uplink[CC_id][slice_idx], N_RB_UL - first_rb[CC_id] - first_rb_offset);
if (available_rbs < 0)
available_rbs = 0;
if (total_ue_count[CC_id] == 0) {
average_rbs_per_user[CC_id] = 0;
} else if (total_ue_count[CC_id] == 1) { // increase the available RBs, special case,
average_rbs_per_user[CC_id] = (uint16_t) (available_rbs + 1);
} else if (total_ue_count[CC_id] <= available_rbs) {
average_rbs_per_user[CC_id] = (uint16_t) floor(available_rbs / total_ue_count[CC_id]);
} else {
average_rbs_per_user[CC_id] = 1;
LOG_W(MAC, "[eNB %d] frame %d subframe %d: UE %d CC %d: can't get average rb per user (should not be here)\n",
module_idP,
frameP,
subframeP,
UE_id,
CC_id);
}
if (total_ue_count[CC_id] > 0) {
LOG_D(MAC, "[eNB %d] Frame %d subframe %d: total ue to be scheduled %d\n",
module_idP,
frameP,
subframeP,
total_ue_count[CC_id]);
}
}
}
// step 3: assigne RBS
for (UE_id = UE_info->list.head; UE_id >= 0; UE_id = UE_info->list.next[UE_id]) {
// if (continueTable[UE_id]) continue;
for (n = 0; n < UE_info->numactiveULCCs[UE_id]; n++) {
// This is the actual CC_id in the list
CC_id = UE_info->ordered_ULCCids[n][UE_id];
UE_template = &UE_info->UE_template[CC_id][UE_id];
harq_pid = subframe2harqpid(&RC.mac[module_idP]->common_channels[CC_id],
sched_frameP, sched_subframeP);
// mac_xface->get_ue_active_harq_pid(module_idP,CC_id,rnti,frameP,subframeP,&harq_pid,&round,openair_harq_UL);
if (UE_info->UE_sched_ctrl[UE_id].round_UL[CC_id][harq_pid] > 0) {
nb_allocated_rbs[CC_id][UE_id] = UE_info->UE_template[CC_id][UE_id].nb_rb_ul[harq_pid];
} else {
nb_allocated_rbs[CC_id][UE_id] =
cmin(UE_info->UE_template[CC_id][UE_id].pre_allocated_nb_rb_ul[slice_idx], average_rbs_per_user[CC_id]);
}
total_allocated_rbs[CC_id] += nb_allocated_rbs[CC_id][UE_id];
LOG_D(MAC, "In ulsch_preprocessor: assigning %d RBs for UE %d/%x CCid %d, harq_pid %d\n",
nb_allocated_rbs[CC_id][UE_id],
UE_id,
rntiTable[UE_id],
CC_id,
harq_pid);
}
}
// step 4: assigne the remaining RBs and set the pre_allocated rbs accordingly
for (UE_id = UE_info->list.head; UE_id >= 0; UE_id = UE_info->list.next[UE_id]) {
// if (continueTable[UE_id]) continue;
ue_sched_ctl = &UE_info->UE_sched_ctrl[UE_id];
for (n = 0; n < UE_info->numactiveULCCs[UE_id]; n++) {
// This is the actual CC_id in the list
CC_id = UE_info->ordered_ULCCids[n][UE_id];
UE_template = &UE_info->UE_template[CC_id][UE_id];
N_RB_UL = to_prb(eNB->common_channels[CC_id].ul_Bandwidth);
first_rb_offset = UE_info->first_rb_offset[CC_id][slice_idx];
available_rbs = cmin(ue_sched_ctl->max_rbs_allowed_slice_uplink[CC_id][slice_idx], N_RB_UL - first_rb[CC_id] - first_rb_offset);
total_remaining_rbs[CC_id] = available_rbs - total_allocated_rbs[CC_id];
if (total_ue_count[CC_id] == 1) {
total_remaining_rbs[CC_id]++;
}
while (UE_template->pre_allocated_nb_rb_ul[slice_idx] > 0 &&
nb_allocated_rbs[CC_id][UE_id] < UE_template->pre_allocated_nb_rb_ul[slice_idx] &&
total_remaining_rbs[CC_id] > 0) {
nb_allocated_rbs[CC_id][UE_id] = cmin(nb_allocated_rbs[CC_id][UE_id] + 1, UE_template->pre_allocated_nb_rb_ul[slice_idx]);
total_remaining_rbs[CC_id]--;
total_allocated_rbs[CC_id]++;
}
UE_template->pre_allocated_nb_rb_ul[slice_idx] = nb_allocated_rbs[CC_id][UE_id];
LOG_D(MAC, "******************UL Scheduling Information for UE%d CC_id %d ************************\n",
UE_id,
CC_id);
LOG_D(MAC, "[eNB %d] total RB allocated for UE%d CC_id %d = %d\n",
module_idP,
UE_id,
CC_id,
UE_template->pre_allocated_nb_rb_ul[slice_idx]);
}
}
return;
}
void
assign_max_mcs_min_rb(module_id_t module_idP,
int slice_idx,
int frameP,
sub_frame_t subframeP,
uint16_t *first_rb) {
int i;
uint16_t n, UE_id;
uint8_t CC_id;
int mcs;
int rb_table_index = 0, tbs, tx_power;
eNB_MAC_INST *eNB = RC.mac[module_idP];
UE_info_t *UE_info = &eNB->UE_info;
slice_info_t *sli = &eNB->slice_info;
UE_TEMPLATE *UE_template;
UE_sched_ctrl_t *ue_sched_ctl;
int Ncp;
int N_RB_UL;
int first_rb_offset, available_rbs;
for (i = UE_info->list.head; i >= 0; i = UE_info->list.next[i]) {
if (UE_info->UE_sched_ctrl[i].phr_received == 1) {
/* if we've received the power headroom information the UE, we can go to
* maximum mcs */
mcs = cmin(20, sli->ul[slice_idx].maxmcs);
} else {
/* otherwise, limit to QPSK PUSCH */
mcs = cmin(10, sli->ul[slice_idx].maxmcs);
}
UE_id = i;
for (n = 0; n < UE_info->numactiveULCCs[UE_id]; n++) {
// This is the actual CC_id in the list
CC_id = UE_info->ordered_ULCCids[n][UE_id];
AssertFatal(CC_id < RC.nb_mac_CC[module_idP], "CC_id %u should be < %u, loop n=%u < numactiveULCCs[%u]=%u",
CC_id,
NFAPI_CC_MAX,
n,
UE_id,
UE_info->numactiveULCCs[UE_id]);
UE_template = &UE_info->UE_template[CC_id][UE_id];
UE_template->pre_assigned_mcs_ul = mcs;
ue_sched_ctl = &UE_info->UE_sched_ctrl[UE_id];
Ncp = eNB->common_channels[CC_id].Ncp;
N_RB_UL = to_prb(eNB->common_channels[CC_id].ul_Bandwidth);
ue_sched_ctl->max_rbs_allowed_slice_uplink[CC_id][slice_idx] = nb_rbs_allowed_slice(sli->ul[slice_idx].pct, N_RB_UL);
int bytes_to_schedule = UE_template->estimated_ul_buffer - UE_template->scheduled_ul_bytes;
if (bytes_to_schedule < 0) bytes_to_schedule = 0;
int bits_to_schedule = bytes_to_schedule * 8;
// if this UE has UL traffic
if (bits_to_schedule > 0) {
tbs = get_TBS_UL(UE_template->pre_assigned_mcs_ul, 3) << 3; // 1 or 2 PRB with cqi enabled does not work well!
rb_table_index = 2;
// fixme: set use_srs flag
tx_power = estimate_ue_tx_power(tbs, rb_table[rb_table_index], 0, Ncp, 0);
while ((UE_template->phr_info - tx_power < 0 || tbs > bits_to_schedule) && UE_template->pre_assigned_mcs_ul > 3) {
// LOG_I(MAC,"UE_template->phr_info %d tx_power %d mcs %d\n", UE_template->phr_info,tx_power, mcs);
UE_template->pre_assigned_mcs_ul--;
tbs = get_TBS_UL(UE_template->pre_assigned_mcs_ul, rb_table[rb_table_index]) << 3;
tx_power = estimate_ue_tx_power(tbs, rb_table[rb_table_index], 0, Ncp, 0); // fixme: set use_srs
}
first_rb_offset = UE_info->first_rb_offset[CC_id][slice_idx];
available_rbs =
cmin(ue_sched_ctl->max_rbs_allowed_slice_uplink[CC_id][slice_idx], N_RB_UL - first_rb[CC_id] - first_rb_offset);
while (tbs < bits_to_schedule &&
rb_table[rb_table_index] < available_rbs &&
UE_template->phr_info - tx_power > 0 &&
rb_table_index < 32) {
rb_table_index++;
tbs = get_TBS_UL(UE_template->pre_assigned_mcs_ul, rb_table[rb_table_index]) << 3;
tx_power = estimate_ue_tx_power(tbs, rb_table[rb_table_index], 0, Ncp, 0);
}
if (rb_table[rb_table_index] > (available_rbs - 1)) {
rb_table_index--;
}
// 1 or 2 PRB with cqi enabled does not work well
if (rb_table[rb_table_index] < 3) {
rb_table_index = 2; //3PRB
}
UE_template->pre_allocated_rb_table_index_ul = rb_table_index;
UE_template->pre_allocated_nb_rb_ul[slice_idx] = rb_table[rb_table_index];
LOG_D(MAC, "[eNB %d] frame %d subframe %d: for UE %d CC %d: pre-assigned mcs %d, pre-allocated rb_table[%d]=%d RBs (phr %d, tx power %d)\n",
module_idP,
frameP,
subframeP,
UE_id,
CC_id,
UE_template->pre_assigned_mcs_ul,
UE_template->pre_allocated_rb_table_index_ul,
UE_template->pre_allocated_nb_rb_ul[slice_idx],
UE_template->phr_info, tx_power);
} else {
/* if UE has pending scheduling request then pre-allocate 3 RBs */
//if (UE_template->ul_active == 1 && UE_template->ul_SR == 1) {
if (UE_is_to_be_scheduled(module_idP, CC_id, i)) {
/* use QPSK mcs */
UE_template->pre_assigned_mcs_ul = 10;
UE_template->pre_allocated_rb_table_index_ul = 2;
UE_template->pre_allocated_nb_rb_ul[slice_idx] = 3;
} else {
UE_template->pre_assigned_mcs_ul = 0;
UE_template->pre_allocated_rb_table_index_ul = -1;
UE_template->pre_allocated_nb_rb_ul[slice_idx] = 0;
}
}
}
}
}
struct sort_ue_ul_params {
int module_idP;
int sched_frameP;
int sched_subframeP;
};
static int ue_ul_compare(const void *_a, const void *_b, void *_params) {
struct sort_ue_ul_params *params = _params;
UE_info_t *UE_info = &RC.mac[params->module_idP]->UE_info;
int UE_id1 = *(const int *) _a;
int UE_id2 = *(const int *) _b;
int rnti1 = UE_RNTI(params->module_idP, UE_id1);
int pCCid1 = UE_PCCID(params->module_idP, UE_id1);
int round1 = maxround_ul(params->module_idP, rnti1, params->sched_frameP,
params->sched_subframeP);
int rnti2 = UE_RNTI(params->module_idP, UE_id2);
int pCCid2 = UE_PCCID(params->module_idP, UE_id2);
int round2 = maxround_ul(params->module_idP, rnti2, params->sched_frameP,
params->sched_subframeP);
if (round1 > round2)
return -1;
if (round1 < round2)
return 1;
if (UE_info->UE_template[pCCid1][UE_id1].ul_buffer_info[LCGID0] >
UE_info->UE_template[pCCid2][UE_id2].ul_buffer_info[LCGID0])
return -1;
if (UE_info->UE_template[pCCid1][UE_id1].ul_buffer_info[LCGID0] <
UE_info->UE_template[pCCid2][UE_id2].ul_buffer_info[LCGID0])
return 1;
int bytes_to_schedule1 = UE_info->UE_template[pCCid1][UE_id1].estimated_ul_buffer - UE_info->UE_template[pCCid1][UE_id1].scheduled_ul_bytes;
if (bytes_to_schedule1 < 0) bytes_to_schedule1 = 0;
int bytes_to_schedule2 = UE_info->UE_template[pCCid2][UE_id2].estimated_ul_buffer - UE_info->UE_template[pCCid2][UE_id2].scheduled_ul_bytes;
if (bytes_to_schedule2 < 0) bytes_to_schedule2 = 0;
if (bytes_to_schedule1 > bytes_to_schedule2)
return -1;
if (bytes_to_schedule1 < bytes_to_schedule2)
return 1;
if (UE_info->UE_template[pCCid1][UE_id1].pre_assigned_mcs_ul >
UE_info->UE_template[pCCid2][UE_id2].pre_assigned_mcs_ul)
return -1;
if (UE_info->UE_template[pCCid1][UE_id1].pre_assigned_mcs_ul <
UE_info->UE_template[pCCid2][UE_id2].pre_assigned_mcs_ul)
return 1;
if (UE_info->UE_sched_ctrl[UE_id1].cqi_req_timer >
UE_info->UE_sched_ctrl[UE_id2].cqi_req_timer)
return -1;
if (UE_info->UE_sched_ctrl[UE_id1].cqi_req_timer <
UE_info->UE_sched_ctrl[UE_id2].cqi_req_timer)
return 1;
return 0;
}
//-----------------------------------------------------------------------------
/*
* This function sorts the UEs in order, depending on their ulsch buffer and CQI
*/
void sort_ue_ul(module_id_t module_idP,
int slice_idx,
int sched_frameP,
sub_frame_t sched_subframeP,
rnti_t *rntiTable)
//-----------------------------------------------------------------------------
{
int list[MAX_MOBILES_PER_ENB];
int list_size = 0;
struct sort_ue_ul_params params = { module_idP, sched_frameP, sched_subframeP };
UE_info_t *UE_info = &RC.mac[module_idP]->UE_info;
UE_sched_ctrl_t *UE_scheduling_control = NULL;
for (int i = 0; i < MAX_MOBILES_PER_ENB; i++) {
UE_scheduling_control = &(UE_info->UE_sched_ctrl[i]);
/* Check CDRX configuration and if UE is in active time for this subframe */
if (UE_scheduling_control->cdrx_configured == TRUE) {
if (UE_scheduling_control->in_active_time == FALSE) {
continue;
}
}
rntiTable[i] = UE_RNTI(module_idP, i);
// Valid element and is not the actual CC_id in the list
if (UE_info->active[i] == TRUE &&
rntiTable[i] != NOT_A_RNTI &&
UE_info->UE_sched_ctrl[i].ul_out_of_sync != 1 &&
ue_ul_slice_membership(module_idP, i, slice_idx)) {
list[list_size++] = i; // Add to list
}
}
qsort_r(list, list_size, sizeof(int), ue_ul_compare, &params);
if (list_size) { // At mimimum one list element
for (int i = 0; i < list_size - 1; i++) {
UE_info->list.next[list[i]] = list[i + 1];
}
UE_info->list.next[list[list_size - 1]] = -1;
UE_info->list.head = list[0];
} else { // No element
UE_info->list.head = -1;
}
}
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