maki/openairinterface5g
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
93fe1652ed01c2b5e7382d83ccfa68752925ced8
openairinterface5g/openair2/LAYER2/MAC/pre_processor.c
T
Cedric Roux 4a2c0b1eff bugfix: fix allocation of RBGs for retransmission 
When there is a retransmission, we want to use the same number of RBs.

The RBs are allocated by groups (RBGs).

In some cases (like a cell with 25 PRBs), the last RBG contains less RBs.
So in case of a retransmission, if this last RBG was used before we need
to reuse it to have the same number of RBs. If not, we will use more RBs
for the retransmission than the previous transmission.

In an experiment with two UEs (quectel modules) it was seen that when a
retransmission happens with a different number of RBs then the UE is not
happy at all, leading to way more NACKs in the harq processes than should
happen (actually the first NACK was not a NACK at all, but the eNB did
interpret it as a NACK; so the next transmission should simply be discarded
by the UE that successfully received the first transmission; instead the UE
fails to decode the data and sends a NACK, a real one this time).

Maybe it's not the correct solution, but it improve things, there are
much less NACKs.
2021-07-21 23:22:48 +02:00

1183 lines
44 KiB
C
Raw Blame History

/*
* 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 <openair2/LAYER2/NR_MAC_COMMON/nr_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
#define DEBUG_HEADER_PARSING 1
int next_ue_list_looped(UE_list_t* list, int UE_id) {
if (UE_id < 0)
return list->head;
return list->next[UE_id] < 0 ? list->head : list->next[UE_id];
}
int get_rbg_size_last(module_id_t Mod_id, int CC_id) {
const int RBGsize = get_min_rb_unit(Mod_id, CC_id);
const int N_RB_DL = to_prb(RC.mac[Mod_id]->common_channels[CC_id].mib->message.dl_Bandwidth);
if (N_RB_DL == 15 || N_RB_DL == 25 || N_RB_DL == 50 || N_RB_DL == 75)
return RBGsize - 1;
else
return RBGsize;
}
bool try_allocate_harq_retransmission(module_id_t Mod_id,
int CC_id,
int frame,
int subframe,
int UE_id,
int start_rbg,
int *n_rbg_sched,
uint8_t *rbgalloc_mask) {
const int N_RBG = to_rbg(RC.mac[Mod_id]->common_channels[CC_id].mib->message.dl_Bandwidth);
const int RBGsize = get_min_rb_unit(Mod_id, CC_id);
const int RBGlastsize = get_rbg_size_last(Mod_id, CC_id);
UE_info_t *UE_info = &RC.mac[Mod_id]->UE_info;
// check whether there are HARQ retransmissions
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, frame, subframe);
UE_sched_ctrl_t *ue_ctrl = &UE_info->UE_sched_ctrl[UE_id];
// retransmission: allocate
const int nb_rb = UE_info->UE_template[CC_id][UE_id].nb_rb[harq_pid];
if (nb_rb == 0) {
return false;
}
int nb_rbg = (nb_rb + (nb_rb % RBGsize)) / RBGsize;
// needs more RBGs than we can allocate
if (nb_rbg > *n_rbg_sched) {
LOG_D(MAC,
"retransmission of UE %d needs more RBGs (%d) than we have (%d)\n",
UE_id, nb_rbg, *n_rbg_sched);
return false;
}
// ensure that the number of RBs can be contained by the RBGs (!), i.e.
// if we allocate the last RBG this one should have the full RBGsize
if ((nb_rb % RBGsize) == 0 && nb_rbg == *n_rbg_sched
&& rbgalloc_mask[N_RBG - 1] && RBGlastsize != RBGsize) {
LOG_D(MAC,
"retransmission of UE %d needs %d RBs, but the last RBG %d is too small (%d, normal %d)\n",
UE_id, nb_rb, N_RBG - 1, RBGlastsize, RBGsize);
return false;
}
const uint8_t cqi = ue_ctrl->dl_cqi[CC_id];
const int idx = CCE_try_allocate_dlsch(Mod_id, CC_id, subframe, UE_id, cqi);
if (idx < 0) { // cannot allocate CCE
LOG_D(MAC, "cannot allocate UE %d: no CCE can be allocated\n", UE_id);
return false;
}
/* if nb_rb is not multiple of RBGsize, then last RBG must be free
* (it will be allocated just below)
*/
if (nb_rb % RBGsize && !rbgalloc_mask[N_RBG-1]) {
LOG_E(MAC, "retransmission: last RBG already allocated (this should not happen)\n");
return false;
}
ue_ctrl->pre_dci_dl_pdu_idx = idx;
// retransmissions: directly allocate
*n_rbg_sched -= nb_rbg;
ue_ctrl->pre_nb_available_rbs[CC_id] += nb_rb;
if (nb_rb % RBGsize) {
/* special case: if nb_rb is not multiple of RBGsize, then allocate last RBG.
* If we instead allocated another RBG then we will retransmit with more
* RBs and the UE will not accept it.
* (This has been seen in a test with cots UEs, if not true, then change
* code as needed.)
* At this point rbgalloc_mask[N_RBG-1] == 1 due to the test above.
*/
ue_ctrl->rballoc_sub_UE[CC_id][N_RBG-1] = 1;
rbgalloc_mask[N_RBG-1] = 0;
nb_rbg--;
}
for (; nb_rbg > 0; start_rbg++) {
if (!rbgalloc_mask[start_rbg])
continue;
ue_ctrl->rballoc_sub_UE[CC_id][start_rbg] = 1;
rbgalloc_mask[start_rbg] = 0;
nb_rbg--;
}
LOG_D(MAC,
"%4d.%d n_rbg_sched %d after retransmission reservation for UE %d "
"retx nb_rb %d pre_nb_available_rbs %d\n",
frame, subframe, *n_rbg_sched, UE_id,
UE_info->UE_template[CC_id][UE_id].nb_rb[harq_pid],
ue_ctrl->pre_nb_available_rbs[CC_id]);
return true;
}
void *rr_dl_setup(void) {
void *data = malloc(sizeof(int));
*(int *) data = 0;
AssertFatal(data, "could not allocate data in %s()\n", __func__);
return data;
}
void rr_dl_unset(void **data) {
if (*data)
free(*data);
*data = NULL;
}
int rr_dl_run(module_id_t Mod_id,
int CC_id,
int frame,
int subframe,
UE_list_t *UE_list,
int max_num_ue,
int n_rbg_sched,
uint8_t *rbgalloc_mask,
void *data) {
DevAssert(UE_list->head >= 0);
DevAssert(n_rbg_sched > 0);
const int N_RBG = to_rbg(RC.mac[Mod_id]->common_channels[CC_id].mib->message.dl_Bandwidth);
const int RBGsize = get_min_rb_unit(Mod_id, CC_id);
const int RBGlastsize = get_rbg_size_last(Mod_id, CC_id);
UE_info_t *UE_info = &RC.mac[Mod_id]->UE_info;
int rbg = 0;
for (; !rbgalloc_mask[rbg]; rbg++)
; /* fast-forward to first allowed RBG */
/* just start with the UE after the one we had last time. If it does not
* exist, this will start at the head */
int *start_ue = data;
*start_ue = next_ue_list_looped(UE_list, *start_ue);
int UE_id = *start_ue;
UE_list_t UE_sched;
int *cur_UE = &UE_sched.head;
// Allocate retransmissions, and mark UEs with new transmissions
do {
// check whether there are HARQ retransmissions
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, frame, subframe);
UE_sched_ctrl_t *ue_ctrl = &UE_info->UE_sched_ctrl[UE_id];
const uint8_t round = ue_ctrl->round[CC_id][harq_pid];
if (round != 8) {
bool r = try_allocate_harq_retransmission(Mod_id, CC_id, frame, subframe,
UE_id, rbg, &n_rbg_sched,
rbgalloc_mask);
if (r) {
/* if there are no more RBG to give, return */
if (n_rbg_sched <= 0)
return 0;
max_num_ue--;
if (max_num_ue == 0)
return n_rbg_sched;
for (; !rbgalloc_mask[rbg]; rbg++) /* fast-forward */ ;
}
} else {
if (UE_info->UE_template[CC_id][UE_id].dl_buffer_total > 0) {
*cur_UE = UE_id;
cur_UE = &UE_sched.next[UE_id];
}
}
UE_id = next_ue_list_looped(UE_list, UE_id);
} while (UE_id != *start_ue);
*cur_UE = -1; // mark end
if (UE_sched.head < 0)
return n_rbg_sched; // no UE has a transmission
// after allocating retransmissions: pre-allocate CCE, compute number of
// requested RBGs
max_num_ue = min(max_num_ue, n_rbg_sched);
int rb_required[MAX_MOBILES_PER_ENB]; // how much UEs request
cur_UE = &UE_sched.head;
while (*cur_UE >= 0 && max_num_ue > 0) {
const int UE_id = *cur_UE;
const uint8_t cqi = UE_info->UE_sched_ctrl[UE_id].dl_cqi[CC_id];
const int idx = CCE_try_allocate_dlsch(Mod_id, CC_id, subframe, UE_id, cqi);
if (idx < 0) {
LOG_D(MAC, "cannot allocate CCE for UE %d, skipping\n", UE_id);
// SKIP this UE in the list by marking the next as the current
*cur_UE = UE_sched.next[UE_id];
continue;
}
UE_info->UE_sched_ctrl[UE_id].pre_dci_dl_pdu_idx = idx;
const int mcs = cqi_to_mcs[cqi];
UE_info->eNB_UE_stats[CC_id][UE_id].dlsch_mcs1 = mcs;
const uint32_t B = UE_info->UE_template[CC_id][UE_id].dl_buffer_total;
rb_required[UE_id] = find_nb_rb_DL(mcs, B, n_rbg_sched * RBGsize, RBGsize);
max_num_ue--;
cur_UE = &UE_sched.next[UE_id]; // go to next
}
*cur_UE = -1; // not all UEs might be allocated, mark end
/* for one UE after the next: allocate resources */
cur_UE = &UE_sched.head;
while (*cur_UE >= 0) {
const int UE_id = *cur_UE;
UE_sched_ctrl_t *ue_ctrl = &UE_info->UE_sched_ctrl[UE_id];
ue_ctrl->rballoc_sub_UE[CC_id][rbg] = 1;
rbgalloc_mask[rbg] = 0;
const int sRBG = rbg == N_RBG - 1 ? RBGlastsize : RBGsize;
ue_ctrl->pre_nb_available_rbs[CC_id] += sRBG;
rb_required[UE_id] -= sRBG;
if (rb_required[UE_id] <= 0) {
*cur_UE = UE_sched.next[*cur_UE];
if (*cur_UE < 0)
cur_UE = &UE_sched.head;
} else {
cur_UE = UE_sched.next[*cur_UE] < 0 ? &UE_sched.head : &UE_sched.next[*cur_UE];
}
n_rbg_sched--;
if (n_rbg_sched <= 0)
break;
for (rbg++; !rbgalloc_mask[rbg]; rbg++) /* fast-forward */ ;
}
return n_rbg_sched;
}
default_sched_dl_algo_t round_robin_dl = {
.name = "round_robin_dl",
.setup = rr_dl_setup,
.unset = rr_dl_unset,
.run = rr_dl_run,
.data = NULL
};
void *pf_dl_setup(void) {
void *data = calloc(MAX_MOBILES_PER_ENB, sizeof(float));
for (int i = 0; i < MAX_MOBILES_PER_ENB; i++)
*(float *) data = 0.0f;
AssertFatal(data, "could not allocate data in %s()\n", __func__);
return data;
}
void pf_dl_unset(void **data) {
if (*data)
free(*data);
*data = NULL;
}
int pf_wbcqi_dl_run(module_id_t Mod_id,
int CC_id,
int frame,
int subframe,
UE_list_t *UE_list,
int max_num_ue,
int n_rbg_sched,
uint8_t *rbgalloc_mask,
void *data) {
DevAssert(UE_list->head >= 0);
DevAssert(n_rbg_sched > 0);
const int N_RBG = to_rbg(RC.mac[Mod_id]->common_channels[CC_id].mib->message.dl_Bandwidth);
const int RBGsize = get_min_rb_unit(Mod_id, CC_id);
const int RBGlastsize = get_rbg_size_last(Mod_id, CC_id);
UE_info_t *UE_info = &RC.mac[Mod_id]->UE_info;
int rbg = 0;
for (; !rbgalloc_mask[rbg]; rbg++)
; /* fast-forward to first allowed RBG */
UE_list_t UE_sched; // UEs that could be scheduled
int *uep = &UE_sched.head;
float *thr_ue = data;
float coeff_ue[MAX_MOBILES_PER_ENB];
for (int UE_id = UE_list->head; UE_id >= 0; UE_id = UE_list->next[UE_id]) {
const float a = 0.0005f; // corresponds to 200ms window
const uint32_t b = UE_info->eNB_UE_stats[CC_id][UE_id].TBS;
thr_ue[UE_id] = (1 - a) * thr_ue[UE_id] + a * b;
// check whether there are HARQ retransmissions
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, frame, subframe);
UE_sched_ctrl_t *ue_ctrl = &UE_info->UE_sched_ctrl[UE_id];
const uint8_t round = ue_ctrl->round[CC_id][harq_pid];
if (round != 8) {
bool r = try_allocate_harq_retransmission(Mod_id, CC_id, frame, subframe,
UE_id, rbg, &n_rbg_sched,
rbgalloc_mask);
if (r) {
/* if there are no more RBG to give, return */
if (n_rbg_sched <= 0)
return 0;
max_num_ue--;
if (max_num_ue == 0)
return n_rbg_sched;
for (; !rbgalloc_mask[rbg]; rbg++) /* fast-forward */ ;
}
} else {
if (UE_info->UE_template[CC_id][UE_id].dl_buffer_total == 0)
continue;
const int mcs = cqi_to_mcs[UE_info->UE_sched_ctrl[UE_id].dl_cqi[CC_id]];
const uint32_t tbs = get_TBS_DL(mcs, RBGsize);
coeff_ue[UE_id] = (float) tbs / thr_ue[UE_id];
//LOG_I(MAC, " pf UE %d: old TBS %d thr %f MCS %d TBS %d coeff %f\n",
// UE_id, b, thr_ue[UE_id], mcs, tbs, coeff_ue[UE_id]);
*uep = UE_id;
uep = &UE_sched.next[UE_id];
}
}
*uep = -1;
while (max_num_ue > 0 && n_rbg_sched > 0 && UE_sched.head >= 0) {
int *max = &UE_sched.head; /* assume head is max */
int *p = &UE_sched.next[*max];
while (*p >= 0) {
/* if the current one has larger coeff, save for later */
if (coeff_ue[*p] > coeff_ue[*max])
max = p;
p = &UE_sched.next[*p];
}
/* remove the max one */
const int UE_id = *max;
p = &UE_sched.next[*max];
*max = UE_sched.next[*max];
*p = -1;
const uint8_t cqi = UE_info->UE_sched_ctrl[UE_id].dl_cqi[CC_id];
const int idx = CCE_try_allocate_dlsch(Mod_id, CC_id, subframe, UE_id, cqi);
if (idx < 0)
continue;
UE_info->UE_sched_ctrl[UE_id].pre_dci_dl_pdu_idx = idx;
max_num_ue--;
/* allocate as much as possible */
const int mcs = cqi_to_mcs[cqi];
UE_info->eNB_UE_stats[CC_id][UE_id].dlsch_mcs1 = mcs;
int req = find_nb_rb_DL(mcs,
UE_info->UE_template[CC_id][UE_id].dl_buffer_total,
n_rbg_sched * RBGsize,
RBGsize);
UE_sched_ctrl_t *ue_ctrl = &UE_info->UE_sched_ctrl[UE_id];
while (req > 0 && n_rbg_sched > 0) {
ue_ctrl->rballoc_sub_UE[CC_id][rbg] = 1;
rbgalloc_mask[rbg] = 0;
const int sRBG = rbg == N_RBG - 1 ? RBGlastsize : RBGsize;
ue_ctrl->pre_nb_available_rbs[CC_id] += sRBG;
req -= sRBG;
n_rbg_sched--;
for (rbg++; n_rbg_sched > 0 && !rbgalloc_mask[rbg]; rbg++) /* fast-forward */ ;
}
}
return n_rbg_sched;
}
default_sched_dl_algo_t proportional_fair_wbcqi_dl = {
.name = "proportional_fair_wbcqi_dl",
.setup = pf_dl_setup,
.unset = pf_dl_unset,
.run = pf_wbcqi_dl_run,
.data = NULL
};
void *mt_dl_setup(void) {
return NULL;
}
void mt_dl_unset(void **data) {
*data = NULL;
}
int mt_wbcqi_dl_run(module_id_t Mod_id,
int CC_id,
int frame,
int subframe,
UE_list_t *UE_list,
int max_num_ue,
int n_rbg_sched,
uint8_t *rbgalloc_mask,
void *data) {
DevAssert(UE_list->head >= 0);
DevAssert(n_rbg_sched > 0);
const int N_RBG = to_rbg(RC.mac[Mod_id]->common_channels[CC_id].mib->message.dl_Bandwidth);
const int RBGsize = get_min_rb_unit(Mod_id, CC_id);
const int RBGlastsize = get_rbg_size_last(Mod_id, CC_id);
UE_info_t *UE_info = &RC.mac[Mod_id]->UE_info;
int rbg = 0;
for (; !rbgalloc_mask[rbg]; rbg++)
; /* fast-forward to first allowed RBG */
UE_list_t UE_sched; // UEs that could be scheduled
int *uep = &UE_sched.head;
for (int UE_id = UE_list->head; UE_id >= 0; UE_id = UE_list->next[UE_id]) {
// check whether there are HARQ retransmissions
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, frame, subframe);
UE_sched_ctrl_t *ue_ctrl = &UE_info->UE_sched_ctrl[UE_id];
const uint8_t round = ue_ctrl->round[CC_id][harq_pid];
if (round != 8) {
bool r = try_allocate_harq_retransmission(Mod_id, CC_id, frame, subframe,
UE_id, rbg, &n_rbg_sched,
rbgalloc_mask);
if (r) {
/* if there are no more RBG to give, return */
if (n_rbg_sched <= 0)
return 0;
max_num_ue--;
if (max_num_ue == 0)
return n_rbg_sched;
for (; !rbgalloc_mask[rbg]; rbg++) /* fast-forward */ ;
}
} else {
if (UE_info->UE_template[CC_id][UE_id].dl_buffer_total == 0)
continue;
*uep = UE_id;
uep = &UE_sched.next[UE_id];
}
}
*uep = -1;
while (max_num_ue > 0 && n_rbg_sched > 0 && UE_sched.head >= 0) {
int *max = &UE_sched.head; /* assume head is max */
int *p = &UE_sched.next[*max];
while (*p >= 0) {
/* if the current one has better CQI, or the same and more data */
const uint8_t maxCqi = UE_info->UE_sched_ctrl[*max].dl_cqi[CC_id];
const uint32_t maxB = UE_info->UE_template[CC_id][*max].dl_buffer_total;
const uint8_t pCqi = UE_info->UE_sched_ctrl[*p].dl_cqi[CC_id];
const uint32_t pB = UE_info->UE_template[CC_id][*p].dl_buffer_total;
if (pCqi > maxCqi || (pCqi == maxCqi && pB > maxB))
max = p;
p = &UE_sched.next[*p];
}
/* remove the max one */
const int UE_id = *max;
p = &UE_sched.next[*max];
*max = UE_sched.next[*max];
*p = -1;
const uint8_t cqi = UE_info->UE_sched_ctrl[UE_id].dl_cqi[CC_id];
const int idx = CCE_try_allocate_dlsch(Mod_id, CC_id, subframe, UE_id, cqi);
if (idx < 0)
continue;
UE_info->UE_sched_ctrl[UE_id].pre_dci_dl_pdu_idx = idx;
max_num_ue--;
/* allocate as much as possible */
const int mcs = cqi_to_mcs[cqi];
UE_info->eNB_UE_stats[CC_id][UE_id].dlsch_mcs1 = mcs;
int req = find_nb_rb_DL(mcs,
UE_info->UE_template[CC_id][UE_id].dl_buffer_total,
n_rbg_sched * RBGsize,
RBGsize);
UE_sched_ctrl_t *ue_ctrl = &UE_info->UE_sched_ctrl[UE_id];
while (req > 0 && n_rbg_sched > 0) {
ue_ctrl->rballoc_sub_UE[CC_id][rbg] = 1;
rbgalloc_mask[rbg] = 0;
const int sRBG = rbg == N_RBG - 1 ? RBGlastsize : RBGsize;
ue_ctrl->pre_nb_available_rbs[CC_id] += sRBG;
req -= sRBG;
n_rbg_sched--;
for (rbg++; n_rbg_sched > 0 && !rbgalloc_mask[rbg]; rbg++) /* fast-forward */ ;
}
}
return n_rbg_sched;
}
default_sched_dl_algo_t maximum_throughput_wbcqi_dl = {
.name = "maximum_throughput_wbcqi_dl",
.setup = mt_dl_setup,
.unset = mt_dl_unset,
.run = mt_wbcqi_dl_run,
.data = NULL
};
// This function stores the downlink buffer for all the logical channels
void
store_dlsch_buffer(module_id_t Mod_id,
int CC_id,
frame_t frameP,
sub_frame_t subframeP) {
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]) {
UE_TEMPLATE *UE_template = &UE_info->UE_template[CC_id][UE_id];
UE_sched_ctrl_t *UE_sched_ctrl = &UE_info->UE_sched_ctrl[UE_id];
UE_template->dl_buffer_total = 0;
UE_template->dl_pdus_total = 0;
/* loop over all activated logical channels */
for (int i = 0; i < UE_sched_ctrl->dl_lc_num; ++i) {
const int lcid = UE_sched_ctrl->dl_lc_ids[i];
const mac_rlc_status_resp_t rlc_status = mac_rlc_status_ind(Mod_id,
UE_template->rnti,
Mod_id,
frameP,
subframeP,
ENB_FLAG_YES,
MBMS_FLAG_NO,
lcid,
0,
0
);
UE_template->dl_buffer_info[lcid] = rlc_status.bytes_in_buffer;
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];
UE_template->dl_pdus_total += UE_template->dl_pdus_in_buffer[lcid];
/* update the number of bytes in the UE_sched_ctrl. The DLSCH will use
* this to request the corresponding data from the RLC, and this might be
* limited in the preprocessor */
UE_sched_ctrl->dl_lc_bytes[i] = rlc_status.bytes_in_buffer;
#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
}
/* hack: in schedule_ue_spec, 3 bytes are "reserved" (this should be
* done better). An RLC AM entity may ask for only 2 bytes for
* ACKing and get a TBS of 32 bits and due to these 3 reserved bytes we may
* end up with only 1 byte left for RLC, which is not enough. This hack
* prevents the problem. To be done better at some point. If the function
* schedule_ue_spec is (has been) reworked, this hack can be removed.
* Dig for "TBS - ta_len - header_length_total - sdu_length_total - 3"
* in schedule_ue_spec.
*/
if (UE_template->dl_buffer_total > 0 && UE_template->dl_buffer_total <= 2)
UE_template->dl_buffer_total += 3;
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 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) {
eNB_MAC_INST *mac = RC.mac[Mod_id];
UE_info_t *UE_info = &mac->UE_info;
const int N_RBG = to_rbg(mac->common_channels[CC_id].mib->message.dl_Bandwidth);
const int RBGsize = get_min_rb_unit(Mod_id, CC_id);
store_dlsch_buffer(Mod_id, CC_id, frameP, subframeP);
UE_list_t UE_to_sched;
for (int i = 0; i < MAX_MOBILES_PER_ENB; ++i)
UE_to_sched.next[i] = -1;
int *cur = &UE_to_sched.head;
for (int UE_id = UE_info->list.head; UE_id >= 0; UE_id = UE_info->list.next[UE_id]) {
UE_sched_ctrl_t *ue_sched_ctrl = &UE_info->UE_sched_ctrl[UE_id];
const UE_TEMPLATE *ue_template = &UE_info->UE_template[CC_id][UE_id];
/* initialize per-UE scheduling information */
ue_sched_ctrl->pre_nb_available_rbs[CC_id] = 0;
ue_sched_ctrl->dl_pow_off[CC_id] = 2;
memset(ue_sched_ctrl->rballoc_sub_UE[CC_id], 0, sizeof(ue_sched_ctrl->rballoc_sub_UE[CC_id]));
ue_sched_ctrl->pre_dci_dl_pdu_idx = -1;
const rnti_t rnti = UE_RNTI(Mod_id, UE_id);
if (rnti == NOT_A_RNTI) {
LOG_E(MAC, "UE %d has RNTI NOT_A_RNTI!\n", UE_id);
continue;
}
if (UE_info->active[UE_id] != TRUE) {
LOG_E(MAC, "UE %d RNTI %x is NOT active!\n", UE_id, rnti);
continue;
}
if (ue_template->rach_resource_type > 0) {
LOG_D(MAC,
"UE %d is RACH resource type %d\n",
UE_id,
ue_template->rach_resource_type);
continue;
}
if (mac_eNB_get_rrc_status(Mod_id, rnti) < RRC_CONNECTED) {
LOG_D(MAC, "UE %d is not in RRC_CONNECTED\n", UE_id);
continue;
}
/* define UEs to schedule */
*cur = UE_id;
cur = &UE_to_sched.next[UE_id];
}
*cur = -1;
if (UE_to_sched.head < 0)
return;
uint8_t *vrb_map = mac->common_channels[CC_id].vrb_map;
uint8_t rbgalloc_mask[N_RBG_MAX];
int n_rbg_sched = 0;
for (int i = 0; i < N_RBG; i++) {
// calculate mask: init to one + "AND" with vrb_map:
// if any RB in vrb_map is blocked (1), the current RBG will be 0
rbgalloc_mask[i] = 1;
for (int j = 0; j < RBGsize; j++)
rbgalloc_mask[i] &= !vrb_map[RBGsize * i + j];
n_rbg_sched += rbgalloc_mask[i];
}
mac->pre_processor_dl.dl_algo.run(Mod_id,
CC_id,
frameP,
subframeP,
&UE_to_sched,
4, // max_num_ue
n_rbg_sched,
rbgalloc_mask,
mac->pre_processor_dl.dl_algo.data);
// the following block is meant for validation of the pre-processor to check
// whether all UE allocations are non-overlapping and is not necessary for
// scheduling functionality
#ifdef DEBUG_eNB_SCHEDULER
char t[26] = "_________________________";
t[N_RBG] = 0;
for (int i = 0; i < N_RBG; i++)
for (int j = 0; j < RBGsize; j++)
if (vrb_map[RBGsize*i+j] != 0)
t[i] = 'x';
int print = 0;
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;
LOG_D(MAC,
"%4d.%d UE%d %d RBs allocated, pre MCS %d\n",
frameP,
subframeP,
UE_id,
ue_sched_ctrl->pre_nb_available_rbs[CC_id],
UE_info->eNB_UE_stats[CC_id][UE_id].dlsch_mcs1);
print = 1;
for (int i = 0; i < N_RBG; i++) {
if (!ue_sched_ctrl->rballoc_sub_UE[CC_id][i])
continue;
for (int j = 0; j < RBGsize; j++) {
if (vrb_map[RBGsize*i+j] != 0) {
LOG_I(MAC, "%4d.%d DL scheduler allocation list: %s\n", frameP, subframeP, t);
LOG_E(MAC, "%4d.%d: UE %d allocated at locked RB %d/RBG %d\n", frameP,
subframeP, UE_id, RBGsize * i + j, i);
}
vrb_map[RBGsize*i+j] = 1;
}
t[i] = '0' + UE_id;
}
}
if (print)
LOG_D(MAC, "%4d.%d DL scheduler allocation list: %s\n", frameP, subframeP, t);
#endif
}
/// ULSCH PRE_PROCESSOR
void calculate_max_mcs_min_rb(module_id_t mod_id,
int CC_id,
int bytes,
int phr,
int max_mcs,
int *mcs,
int max_rbs,
int *rb_index,
int *tx_power) {
const int Ncp = RC.mac[mod_id]->common_channels[CC_id].Ncp;
/* TODO shouldn't we consider the SRS or other quality indicators? */
*mcs = max_mcs;
*rb_index = 2;
int tbs = get_TBS_UL(*mcs, rb_table[*rb_index]);
// fixme: set use_srs flag
*tx_power = estimate_ue_tx_power(0,tbs * 8, rb_table[*rb_index], 0, Ncp, 0);
/* find maximum MCS */
while ((phr - *tx_power < 0 || tbs > bytes) && *mcs > 3) {
(*mcs)--;
tbs = get_TBS_UL(*mcs, rb_table[*rb_index]);
*tx_power = estimate_ue_tx_power(0,tbs * 8, rb_table[*rb_index], 0, Ncp, 0);
}
/* find minimum necessary RBs */
while (tbs < bytes
&& *rb_index < 32
&& rb_table[*rb_index] < max_rbs
&& phr - *tx_power > 0) {
(*rb_index)++;
tbs = get_TBS_UL(*mcs, rb_table[*rb_index]);
*tx_power = estimate_ue_tx_power(0,tbs * 8, rb_table[*rb_index], 0, Ncp, 0);
}
/* Decrease if we went to far in last iteration */
if (rb_table[*rb_index] > max_rbs)
(*rb_index)--;
// 1 or 2 PRB with cqi enabled does not work well
if (rb_table[*rb_index] < 3) {
*rb_index = 2; //3PRB
}
}
int pp_find_rb_table_index(int approximate) {
int lo = 2;
if (approximate <= rb_table[lo])
return lo;
int hi = sizeof(rb_table) - 1;
if (approximate >= rb_table[hi])
return hi;
int p = (hi + lo) / 2;
for (; lo + 1 != hi; p = (hi + lo) / 2) {
if (approximate <= rb_table[p])
hi = p;
else
lo = p;
}
return p + 1;
}
void *rr_ul_setup(void) {
void *data = malloc(sizeof(int));
*(int *) data = 0;
AssertFatal(data, "could not allocate data in %s()\n", __func__);
return data;
}
void rr_ul_unset(void **data) {
if (*data)
free(*data);
*data = NULL;
}
int rr_ul_run(module_id_t Mod_id,
int CC_id,
int frame,
int subframe,
int sched_frame,
int sched_subframe,
UE_list_t *UE_list,
int max_num_ue,
int num_contig_rb,
contig_rbs_t *rbs,
void *data) {
AssertFatal(num_contig_rb <= 2, "cannot handle more than two contiguous RB regions\n");
UE_info_t *UE_info = &RC.mac[Mod_id]->UE_info;
const int max_rb = num_contig_rb > 1 ? MAX(rbs[0].length, rbs[1].length) : rbs[0].length;
eNB_MAC_INST *mac = RC.mac[Mod_id];
/* for every UE: check whether we have to handle a retransmission (and
* allocate, if so). If not, compute how much RBs this UE would need */
int rb_idx_required[MAX_MOBILES_PER_ENB];
memset(rb_idx_required, 0, sizeof(rb_idx_required));
int num_ue_req = 0;
for (int UE_id = UE_list->head; UE_id >= 0; UE_id = UE_list->next[UE_id]) {
UE_TEMPLATE *UE_template = &UE_info->UE_template[CC_id][UE_id];
uint8_t harq_pid = subframe2harqpid(&mac->common_channels[CC_id],
sched_frame, sched_subframe);
if (UE_info->UE_sched_ctrl[UE_id].round_UL[CC_id][harq_pid] > 0) {
/* this UE has a retransmission, allocate it right away */
const int nb_rb = UE_template->nb_rb_ul[harq_pid];
if (nb_rb == 0) {
LOG_E(MAC,
"%4d.%d UE %d retransmission of 0 RBs in round %d, ignoring\n",
sched_frame, sched_subframe, UE_id,
UE_info->UE_sched_ctrl[UE_id].round_UL[CC_id][harq_pid]);
continue;
}
const uint8_t cqi = UE_info->UE_sched_ctrl[UE_id].dl_cqi[CC_id];
const int idx = CCE_try_allocate_ulsch(Mod_id, CC_id, subframe, UE_id, cqi);
if (idx < 0)
continue; // cannot allocate CCE
UE_template->pre_dci_ul_pdu_idx = idx;
if (rbs[0].length >= nb_rb) { // fits in first contiguous region
UE_template->pre_first_nb_rb_ul = rbs[0].start;
rbs[0].length -= nb_rb;
rbs[0].start += nb_rb;
} else if (num_contig_rb == 2 && rbs[1].length >= nb_rb) { // in second
UE_template->pre_first_nb_rb_ul = rbs[1].start;
rbs[1].length -= nb_rb;
rbs[1].start += nb_rb;
} else if (num_contig_rb == 2
&& rbs[1].start + rbs[1].length - rbs[0].start >= nb_rb) { // overlapping the middle
UE_template->pre_first_nb_rb_ul = rbs[0].start;
rbs[0].length = 0;
int ol = nb_rb - (rbs[1].start - rbs[0].start); // how much overlap in second region
if (ol > 0) {
rbs[1].length -= ol;
rbs[1].start += ol;
}
} else {
LOG_W(MAC,
"%d.%d cannot allocate UL retransmission for UE %d (nb_rb %d, rbs0.length %d, rbs1.length %d,rbs0.start %d,rbs1.start %d)\n",
sched_frame,sched_subframe,UE_id,
nb_rb, rbs[0].length,rbs[1].length,rbs[0].start,rbs[1].start);
UE_template->pre_dci_ul_pdu_idx = -1; // do not need CCE
mac->HI_DCI0_req[CC_id][subframe].hi_dci0_request_body.number_of_dci--;
continue;
}
LOG_D(MAC, "%4d.%d UE %d retx %d RBs at start %d\n",
sched_frame,
sched_subframe,
UE_id,
UE_template->pre_allocated_nb_rb_ul,
UE_template->pre_first_nb_rb_ul);
UE_template->pre_allocated_nb_rb_ul = nb_rb;
max_num_ue--;
if (max_num_ue == 0) /* in this case, cannot allocate any other UE anymore */
return rbs[0].length + (num_contig_rb > 1 ? rbs[1].length : 0);
continue;
}
const int B = cmax(UE_template->estimated_ul_buffer - UE_template->scheduled_ul_bytes, 0);
const int UE_to_be_scheduled = UE_is_to_be_scheduled(Mod_id, CC_id, UE_id);
if (B == 0 && !UE_to_be_scheduled)
continue;
num_ue_req++;
/* if UE has pending scheduling request then pre-allocate 3 RBs */
if (B == 0 && UE_to_be_scheduled) {
UE_template->pre_assigned_mcs_ul = 10; /* use QPSK mcs only */
rb_idx_required[UE_id] = 2;
//UE_template->pre_allocated_nb_rb_ul = 3;
continue;
}
int mcs;
int rb_table_index;
int tx_power;
calculate_max_mcs_min_rb(
Mod_id,
CC_id,
B,
UE_template->phr_info,
UE_info->UE_sched_ctrl[UE_id].phr_received == 1 ? 20 : 10,
&mcs,
max_rb,
&rb_table_index,
&tx_power);
UE_template->pre_assigned_mcs_ul = mcs;
/* rb_idx_given >= MAX index: limit RBs to value in configuration file
* RBs in the uplink. */
rb_idx_required[UE_id] = min(mac->max_ul_rb_index, rb_table_index);
//UE_template->pre_allocated_nb_rb_ul = rb_table[rb_table_index];
/* only print log when PHR changed */
static int phr = 0;
if (phr != UE_template->phr_info) {
phr = UE_template->phr_info;
LOG_D(MAC, "%d.%d UE %d CC %d: pre mcs %d, pre rb_table[%d]=%d RBs (phr %d, tx power %d, bytes %d)\n",
frame,
subframe,
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,
UE_template->phr_info,
tx_power,
B);
}
}
if (num_ue_req == 0)
return rbs[0].length + (num_contig_rb > 1 ? rbs[1].length : 0);
// calculate how many users should be in both regions, and to maximize usage,
// go from the larger to the smaller one which at least will handle a single
// full load case better.
const int n = min(num_ue_req, max_num_ue);
int nr[2] = {n, 0};
int step = 1; // the order if we have two regions
int start = 0;
int end = 1;
if (num_contig_rb > 1) {
// proportionally divide between both regions
int la = rbs[0].length > 0 ? rbs[0].length : 1;
int lb = rbs[1].length > 0 ? rbs[1].length : 1;
nr[1] = min(max(n/(la/lb + 1), 1), n - 1);
nr[0] = n - nr[1];
step = la > lb ? 1 : -1; // 1: from 0 to 1, -1: from 1 to 0
start = la > lb ? 0 : 1;
end = la > lb ? 2 : -1;
}
int *start_ue = data;
if (*start_ue == -1)
*start_ue = UE_list->head;
int sUE_id = *start_ue;
int rb_idx_given[MAX_MOBILES_PER_ENB];
memset(rb_idx_given, 0, sizeof(rb_idx_given));
for (int r = start; r != end; r += step) {
// don't allocate if we have too little RBs
if (rbs[r].length < 3)
continue;
if (nr[r] <= 0)
continue;
UE_list_t UE_sched;
// average RB index: just below the index that fits all UEs
int start_idx = pp_find_rb_table_index(rbs[r].length / nr[r]) - 1;
int num_ue_sched = 0;
int rb_required_add = 0;
int *cur_UE = &UE_sched.head;
while (num_ue_sched < nr[r]) {
while (rb_idx_required[sUE_id] == 0)
sUE_id = next_ue_list_looped(UE_list, sUE_id);
const int cqi = UE_info->UE_sched_ctrl[sUE_id].dl_cqi[CC_id];
const int idx = CCE_try_allocate_ulsch(Mod_id, CC_id, subframe, sUE_id, cqi);
if (idx < 0) {
LOG_D(MAC, "cannot allocate CCE for UE %d, skipping\n", sUE_id);
nr[r]--;
sUE_id = next_ue_list_looped(UE_list, sUE_id); // next candidate
continue;
}
UE_info->UE_template[CC_id][sUE_id].pre_dci_ul_pdu_idx = idx;
*cur_UE = sUE_id;
cur_UE = &UE_sched.next[sUE_id];
rb_idx_given[sUE_id] = min(start_idx, rb_idx_required[sUE_id]);
rb_required_add += rb_table[rb_idx_required[sUE_id]] - rb_table[rb_idx_given[sUE_id]];
rbs[r].length -= rb_table[rb_idx_given[sUE_id]];
num_ue_sched++;
sUE_id = next_ue_list_looped(UE_list, sUE_id);
}
*cur_UE = -1;
/* give remaining RBs in RR fashion. Since we don't know in advance the
* amount of RBs we can give (the "step size" in rb_table is non-linear), go
* through all UEs and try to give a bit more. Continue until no UE can be
* given a higher index because the remaining RBs do not suffice to increase */
int UE_id = UE_sched.head;
int rb_required_add_old;
do {
rb_required_add_old = rb_required_add;
for (int UE_id = UE_sched.head; UE_id >= 0; UE_id = UE_sched.next[UE_id]) {
if (rb_idx_given[UE_id] >= rb_idx_required[UE_id])
continue; // this UE does not need more
const int new_idx = rb_idx_given[UE_id] + 1;
const int rb_inc = rb_table[new_idx] - rb_table[rb_idx_given[UE_id]];
if (rbs[r].length < rb_inc)
continue;
rb_idx_given[UE_id] = new_idx;
rbs[r].length -= rb_inc;
rb_required_add -= rb_inc;
}
} while (rb_required_add != rb_required_add_old);
for (UE_id = UE_sched.head; UE_id >= 0; UE_id = UE_sched.next[UE_id]) {
UE_TEMPLATE *UE_template = &UE_info->UE_template[CC_id][UE_id];
/* MCS has been allocated previously */
UE_template->pre_first_nb_rb_ul = rbs[r].start;
UE_template->pre_allocated_rb_table_index_ul = rb_idx_given[UE_id];
UE_template->pre_allocated_nb_rb_ul = rb_table[rb_idx_given[UE_id]];
rbs[r].start += rb_table[rb_idx_given[UE_id]];
LOG_D(MAC, "%4d.%d UE %d allocated %d RBs start %d new start %d\n",
sched_frame,
sched_subframe,
UE_id,
UE_template->pre_allocated_nb_rb_ul,
UE_template->pre_first_nb_rb_ul,
rbs[r].start);
}
}
/* just start with the next UE next time */
*start_ue = next_ue_list_looped(UE_list, *start_ue);
return rbs[0].length + (num_contig_rb > 1 ? rbs[1].length : 0);
}
default_sched_ul_algo_t round_robin_ul = {
.name = "round_robin_ul",
.setup = rr_ul_setup,
.unset = rr_ul_unset,
.run = rr_ul_run,
.data = NULL
};
void ulsch_scheduler_pre_processor(module_id_t Mod_id,
int CC_id,
frame_t frameP,
sub_frame_t subframeP,
frame_t sched_frameP,
sub_frame_t sched_subframeP) {
eNB_MAC_INST *mac = RC.mac[Mod_id];
UE_info_t *UE_info = &mac->UE_info;
const int N_RB_UL = to_prb(mac->common_channels[CC_id].ul_Bandwidth);
COMMON_channels_t *cc = &mac->common_channels[CC_id];
UE_list_t UE_to_sched;
for (int i = 0; i < MAX_MOBILES_PER_ENB; ++i)
UE_to_sched.next[i] = -1;
int *cur = &UE_to_sched.head;
for (int UE_id = UE_info->list.head; UE_id >= 0; UE_id = UE_info->list.next[UE_id]) {
UE_TEMPLATE *UE_template = &UE_info->UE_template[CC_id][UE_id];
UE_sched_ctrl_t *ue_sched_ctrl = &UE_info->UE_sched_ctrl[UE_id];
/* initialize per-UE scheduling information */
UE_template->pre_assigned_mcs_ul = 0;
UE_template->pre_allocated_nb_rb_ul = 0;
UE_template->pre_allocated_rb_table_index_ul = -1;
UE_template->pre_first_nb_rb_ul = 0;
UE_template->pre_dci_ul_pdu_idx = -1;
const rnti_t rnti = UE_RNTI(Mod_id, UE_id);
if (rnti == NOT_A_RNTI) {
LOG_E(MAC, "UE %d has RNTI NOT_A_RNTI!\n", UE_id);
continue;
}
if (ue_sched_ctrl->cdrx_configured && !ue_sched_ctrl->in_active_time)
continue;
if (UE_info->UE_template[CC_id][UE_id].rach_resource_type > 0)
continue;
/* define UEs to schedule */
*cur = UE_id;
cur = &UE_to_sched.next[UE_id];
}
*cur = -1;
if (UE_to_sched.head < 0)
return;
int last_rb_blocked = 1;
int n_contig = 0;
contig_rbs_t rbs[2]; // up to two contig RBs for PRACH in between
for (int i = 0; i < N_RB_UL; ++i) {
if (cc->vrb_map_UL[i] == 0 && last_rb_blocked == 1) {
last_rb_blocked = 0;
n_contig++;
AssertFatal(n_contig <= 2, "cannot handle more than two contiguous RB regions\n");
rbs[n_contig - 1].start = i;
}
if (cc->vrb_map_UL[i] == 1 && last_rb_blocked == 0) {
last_rb_blocked = 1;
rbs[n_contig - 1].length = i - rbs[n_contig - 1].start;
}
}
mac->pre_processor_ul.ul_algo.run(Mod_id,
CC_id,
frameP,
subframeP,
sched_frameP,
sched_subframeP,
&UE_to_sched,
4, // max_num_ue
n_contig,
rbs,
mac->pre_processor_ul.ul_algo.data);
// the following block is meant for validation of the pre-processor to check
// whether all UE allocations are non-overlapping and is not necessary for
// scheduling functionality
#ifdef DEBUG_eNB_SCHEDULER
char t[101] = "__________________________________________________"
"__________________________________________________";
t[N_RB_UL] = 0;
for (int j = 0; j < N_RB_UL; j++)
if (cc->vrb_map_UL[j] != 0)
t[j] = 'x';
int print = 0;
for (int UE_id = UE_info->list.head; UE_id >= 0; UE_id = UE_info->list.next[UE_id]) {
UE_TEMPLATE *UE_template = &UE_info->UE_template[CC_id][UE_id];
if (UE_template->pre_allocated_nb_rb_ul == 0)
continue;
print = 1;
uint8_t harq_pid = subframe2harqpid(&mac->common_channels[CC_id],
sched_frameP, sched_subframeP);
LOG_D(MAC, "%4d.%d UE%d %d RBs (index %d) at start %d, pre MCS %d %s\n",
frameP,
subframeP,
UE_id,
UE_template->pre_allocated_nb_rb_ul,
UE_template->pre_allocated_rb_table_index_ul,
UE_template->pre_first_nb_rb_ul,
UE_template->pre_assigned_mcs_ul,
UE_info->UE_sched_ctrl[UE_id].round_UL[CC_id][harq_pid] > 0 ? "(retx)" : "");
for (int i = 0; i < UE_template->pre_allocated_nb_rb_ul; ++i) {
/* only check if this is not a retransmission */
if (UE_info->UE_sched_ctrl[UE_id].round_UL[CC_id][harq_pid] == 0
&& cc->vrb_map_UL[UE_template->pre_first_nb_rb_ul + i] == 1) {
LOG_I(MAC, "%4d.%d UL scheduler allocation list: %s\n", frameP, subframeP, t);
LOG_E(MAC,
"%4d.%d: UE %d allocated at locked RB %d (is: allocated start "
"%d/length %d)\n",
frameP, subframeP, UE_id, UE_template->pre_first_nb_rb_ul + i,
UE_template->pre_first_nb_rb_ul,
UE_template->pre_allocated_nb_rb_ul);
}
cc->vrb_map_UL[UE_template->pre_first_nb_rb_ul + i] = 1;
t[UE_template->pre_first_nb_rb_ul + i] = UE_id + '0';
}
}
if (print)
LOG_D(MAC,
"%4d.%d UL scheduler allocation list: %s\n",
sched_frameP,
sched_subframeP,
t);
#endif
}
Reference in New Issue View Git Blame Copy Permalink