5g-team
/
srsRAN_4G
mirror of https://github.com/pvnis/srsRAN_4G.git
2
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Remove time exponential averaging of DL cqi

Browse Source 
- renaming: sched_cqi -> sched_dl_cqi
- testing: add unit test for sched_dl_cqi wideband cqi mode.
- feature: remove time exponential averaging of dl cqi
master
Francisco 4 years ago committed by Francisco Paisana
parent 28c24a89ef
commit 16d05ff042
3 changed files with 56 additions and 21 deletions
Show Stats Download Patch File Download Diff File

35
srsenb/hdr/stack/mac/sched_ue_ctrl/sched_cqi.h → srsenb/hdr/stack/mac/sched_ue_ctrl/sched_dl_cqi.h
Unescape Escape View File

@ -10,8 +10,8 @@
*
*/
#ifndef SRSRAN_SCHED_CQI_H
#define SRSRAN_SCHED_CQI_H
#ifndef SRSRAN_SCHED_DL_CQI_H
#define SRSRAN_SCHED_DL_CQI_H
#include "srsenb/hdr/stack/mac/sched_common.h"
#include "srsenb/hdr/stack/mac/sched_helpers.h"
@ -21,10 +21,16 @@
namespace srsenb {
class sched_cqi
/**
* Class that handles DL CQI state of a given {rnti,sector}
* - The cell bandwidth is divided into J parts. J = f(nof_cell_prbs)
* - UE reports wideband CQI every H.Np msec, where Np is the CQI period and H=JK + 1, where K is configured in RRC
* - Thus, for K==0, only wideband CQI is active
*/
class sched_dl_cqi
{
public:
sched_cqi(uint32_t cell_nof_prb_, uint32_t K_, float alpha = 0.1) :
sched_dl_cqi(uint32_t cell_nof_prb_, uint32_t K_, float alpha = 0.1) :
cell_nof_prb(cell_nof_prb_),
cell_nof_rbg(cell_nof_prb_to_rbg(cell_nof_prb_)),
K(K_),
@ -35,12 +41,10 @@ public:
srsran_assert(K <= 4, "K=%d outside of {0, 4}", K);
}
void new_tti(tti_point tti) {}
void cqi_wb_info(tti_point tti, uint32_t cqi_value)
{
last_wb_tti = tti;
wb_cqi_avg.push(static_cast<float>(cqi_value));
wb_cqi_avg = static_cast<float>(cqi_value);
}
void cqi_sb_info(tti_point tti, uint32_t sb_index, uint32_t cqi_value)
@ -48,12 +52,12 @@ public:
uint32_t bp_idx = get_bp_index(sb_index);
bp_list[bp_idx].last_feedback_tti = tti;
bp_list[bp_idx].last_cqi_subband_idx = sb_index;
bp_list[bp_idx].cqi_val.push(static_cast<float>(cqi_value));
bp_list[bp_idx].cqi_val = static_cast<float>(cqi_value);
// just cap all sub-bands in the same bandwidth part
srsran::interval<uint32_t> interv = get_bp_sb_indexes(bp_idx);
for (uint32_t sb_index2 = interv.start(); sb_index2 < interv.stop(); ++sb_index2) {
subband_cqi[sb_index2] = bp_list[bp_idx].cqi_val.value();
subband_cqi[sb_index2] = bp_list[bp_idx].cqi_val;
}
}
@ -61,7 +65,7 @@ public:
int get_rbg_grant_avg_cqi(rbg_interval interv) const
{
if (not subband_cqi_enabled()) {
return static_cast<int>(wb_cqi_avg.value());
return static_cast<int>(wb_cqi_avg);
}
float cqi = 0;
for (uint32_t rbg = interv.start(); rbg < interv.stop(); ++rbg) {
@ -74,7 +78,7 @@ public:
int get_rbg_grant_avg_cqi(const rbgmask_t& mask) const
{
if (not subband_cqi_enabled()) {
return static_cast<int>(wb_cqi_avg.value());
return static_cast<int>(wb_cqi_avg);
}
float cqi = 0;
for (int rbg = mask.find_lowest(0, mask.size()); rbg != -1; rbg = mask.find_lowest(rbg + 1, mask.size())) {
@ -113,9 +117,10 @@ private:
static const uint32_t max_nof_subbands = 13;
static const uint32_t max_bandwidth_parts = 4;
/// TS 36.321, Table 7.2.2-2
static uint32_t nof_bandwidth_parts(uint32_t nof_prb)
{
static const uint32_t nrb[] = {0, 1, 2, 3, 4};
static const uint32_t nrb[] = {0, 2, 2, 3, 4, 4};
return nrb[srsran::lte_cell_nof_prb_to_index(nof_prb)];
}
@ -141,13 +146,13 @@ private:
struct bandwidth_part_context {
tti_point last_feedback_tti;
uint32_t last_cqi_subband_idx;
srsran::exp_average_fast_start<float> cqi_val;
float cqi_val;
explicit bandwidth_part_context(float alpha) : cqi_val(alpha), last_cqi_subband_idx(max_nof_subbands) {}
};
tti_point last_wb_tti;
srsran::exp_average_fast_start<float> wb_cqi_avg;
float wb_cqi_avg;
srsran::bounded_vector<bandwidth_part_context, max_bandwidth_parts> bp_list;
srsran::bounded_vector<float, max_nof_subbands> subband_cqi;
@ -155,4 +160,4 @@ private:
} // namespace srsenb
#endif // SRSRAN_SCHED_CQI_H
#endif // SRSRAN_SCHED_DL_CQI_H

2
srsenb/hdr/stack/mac/sched_ue_ctrl/sched_ue_cell.h
Unescape Escape View File

@ -14,7 +14,7 @@
#define SRSRAN_SCHED_UE_CELL_H
#include "../sched_common.h"
#include "sched_cqi.h"
#include "sched_dl_cqi.h"
#include "sched_harq.h"
#include "srsenb/hdr/stack/mac/sched_phy_ch/sched_dci.h"
#include "tpc.h"

34
srsenb/test/mac/sched_cqi_test.cc
Unescape Escape View File

@ -10,14 +10,15 @@
*
*/
#include "srsenb/hdr/stack/mac/sched_ue_ctrl/sched_cqi.h"
#include "srsenb/hdr/stack/mac/sched_ue_ctrl/sched_dl_cqi.h"
#include "srsran/common/test_common.h"
namespace srsenb {
void test_sched_cqi_one_subband_cqi()
{
sched_cqi ue_cqi(50, 4);
// 50 PRBs, K=4
sched_dl_cqi ue_cqi(50, 4);
// J == 3, N == 9
TESTASSERT(ue_cqi.nof_bandwidth_parts() == 3);
@ -51,6 +52,34 @@ void test_sched_cqi_one_subband_cqi()
}
}
void test_sched_cqi_wideband_cqi()
{
uint32_t nof_prb = 50;
uint32_t nof_rbgs = cell_nof_prb_to_rbg(nof_prb);
sched_dl_cqi ue_cqi(nof_prb, 0);
ue_cqi.cqi_wb_info(tti_point(0), 5);
// TEST: all bandwidth has positive cqi.
for (uint32_t i = 0; i < nof_rbgs; ++i) {
TESTASSERT(ue_cqi.get_rbg_grant_avg_cqi(rbg_interval(i, i + 1)) == 5);
}
TESTASSERT(ue_cqi.get_rbg_grant_avg_cqi(rbg_interval(0, nof_rbgs)) == 5);
// TEST: Check average cqi over a mask of RBGs
rbgmask_t mask(cell_nof_prb_to_rbg(50));
mask.fill(10, mask.size());
TESTASSERT(ue_cqi.get_rbg_grant_avg_cqi(mask) == 5);
// TEST: Get optimal RBG mask in terms of CQI
mask = ue_cqi.get_optim_rbg_mask(5);
TESTASSERT(mask.count() == 5);
for (uint32_t i = 0; i < 5; ++i) {
TESTASSERT(mask.test(i) > 0);
}
}
} // namespace srsenb
int main(int argc, char** argv)
@ -58,6 +87,7 @@ int main(int argc, char** argv)
srsran::test_init(argc, argv);
srsenb::test_sched_cqi_one_subband_cqi();
srsenb::test_sched_cqi_wideband_cqi();
return SRSRAN_SUCCESS;
}

Write Preview
Loading…
Cancel
Save