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292 lines
11 KiB
C++
292 lines
11 KiB
C++
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2020 Software Radio Systems Limited
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*
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* By using this file, you agree to the terms and conditions set
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* forth in the LICENSE file which can be found at the top level of
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* the distribution.
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*
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*/
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#include "sched_test_utils.h"
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#include "srsenb/hdr/stack/mac/sched_common.h"
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#include "srsenb/hdr/stack/mac/sched_phy_ch/sched_dci.h"
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#include "srslte/common/test_common.h"
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namespace srsenb {
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struct tbs_test_args {
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bool verbose = false;
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bool is_ul = false;
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bool use_tbs_index_alt = false;
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bool ul64qam_enabled = false;
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uint32_t cqi = 5;
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uint32_t max_mcs = 28;
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uint32_t prb_grant_size = 1;
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int req_bytes = std::numeric_limits<int>::max();
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tti_point tti_tx_dl{0};
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uint32_t get_max_Qm() const
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{
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if (is_ul) {
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return ul64qam_enabled ? 6 : 4;
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}
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return use_tbs_index_alt ? 8 : 6;
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}
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float get_max_coderate() const
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{
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if (is_ul) {
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return srslte_cqi_to_coderate(std::min(cqi + 1u, 15u), false);
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}
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return srslte_cqi_to_coderate(std::min(cqi + 1u, 15u), use_tbs_index_alt);
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}
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};
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bool lower_coderate(tbs_info tb, uint32_t nof_re, const tbs_test_args& args)
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{
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float max_coderate = srslte_cqi_to_coderate(std::min(args.cqi + 1u, 15u), args.use_tbs_index_alt);
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float coderate = srslte_coderate(tb.tbs_bytes * 8, nof_re);
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if (coderate > max_coderate) {
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return false;
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}
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srslte_mod_t mod =
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(args.is_ul) ? srslte_ra_ul_mod_from_mcs(tb.mcs) : srslte_ra_dl_mod_from_mcs(tb.mcs, args.use_tbs_index_alt);
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float Qm = std::min(args.get_max_Qm(), srslte_mod_bits_x_symbol(mod));
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return coderate <= 0.932f * Qm;
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}
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int test_mcs_tbs_dl_helper(const sched_cell_params_t& cell_params, const tbs_test_args& args, tbs_info* result)
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{
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srslte_dci_dl_t dci;
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dci.format = SRSLTE_DCI_FORMAT1;
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dci.alloc_type = SRSLTE_RA_ALLOC_TYPE0;
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rbgmask_t rbgmask(cell_params.nof_rbgs);
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rbgmask.fill(0, cell_params.nof_prbs_to_rbgs(args.prb_grant_size));
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dci.type0_alloc.rbg_bitmask = (uint32_t)rbgmask.to_uint64();
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uint32_t nof_re = cell_params.get_dl_nof_res(args.tti_tx_dl, dci, 1);
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float max_coderate = args.get_max_coderate();
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if (srslte_coderate(16, nof_re) > max_coderate) {
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// no solution is possible
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return SRSLTE_SUCCESS;
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}
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// Verify MCS, TBS
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tbs_info ret = compute_mcs_and_tbs(
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args.prb_grant_size, nof_re, args.cqi, args.max_mcs, args.is_ul, args.ul64qam_enabled, args.use_tbs_index_alt);
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if (ret.tbs_bytes < 0) {
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return SRSLTE_SUCCESS;
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}
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if (result != nullptr) {
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*result = ret;
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}
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CONDERROR(ret.mcs > (int)args.max_mcs, "Result mcs=%d is higher than stipulated max_mcs=%d", ret.mcs, args.max_mcs);
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// Verify TBS is a valid value in TS tables
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uint32_t tbs_idx = srslte_ra_tbs_idx_from_mcs(ret.mcs, args.use_tbs_index_alt, args.is_ul);
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int expected_tbs = srslte_ra_tbs_from_idx(tbs_idx, args.prb_grant_size);
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CONDERROR(expected_tbs != ret.tbs_bytes * 8,
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"The tbs=%d is not valid. For {mcs=%d,tbs_idx=%d,nof_re=%d,nof_prb=%d}, it should have been tbs=%d",
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ret.tbs_bytes * 8,
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ret.mcs,
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tbs_idx,
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nof_re,
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args.prb_grant_size,
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expected_tbs);
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// Verify coderate doesn't surpass maximum
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CONDERROR(not lower_coderate(ret, nof_re, args), "Coderate is higher than maximum");
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// Verify there were no better {mcs,tbs} solutions
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tbs_info tb2;
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for (tb2.mcs = ret.mcs + 1; tb2.mcs <= (int)args.max_mcs; ++tb2.mcs) {
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int tbs_idx2 = srslte_ra_tbs_idx_from_mcs(tb2.mcs, args.use_tbs_index_alt, args.is_ul);
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tb2.tbs_bytes = srslte_ra_tbs_from_idx(tbs_idx2, args.prb_grant_size) / 8U;
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TESTASSERT(not lower_coderate(tb2, nof_re, args) or (args.prb_grant_size == 1 and tb2.mcs == 6));
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}
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// log results
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if (args.verbose) {
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printf("input={max_mcs=%d,cqi=%d,nof_prb=%d,nof_re=%d} -> output={mcs=%d, tbs=%d, tbs_index=%d}\n",
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args.max_mcs,
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args.cqi,
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args.prb_grant_size,
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nof_re,
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ret.mcs,
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ret.tbs_bytes * 8,
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tbs_idx);
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}
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return SRSLTE_SUCCESS;
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}
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int assert_mcs_tbs_result(uint32_t cell_nof_prb,
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uint32_t cqi,
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uint32_t prb_grant_size,
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uint32_t tbs,
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uint32_t mcs,
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bool alt_cqi_table = false)
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{
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sched_cell_params_t cell_params = {};
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sched_interface::cell_cfg_t cell_cfg = generate_default_cell_cfg(cell_nof_prb);
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sched_interface::sched_args_t sched_args = {};
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cell_params.set_cfg(0, cell_cfg, sched_args);
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tbs_test_args args;
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args.verbose = true;
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args.cqi = cqi;
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args.prb_grant_size = prb_grant_size;
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args.use_tbs_index_alt = alt_cqi_table;
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if (alt_cqi_table) {
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args.max_mcs = std::min(args.max_mcs, 27U); // limited to 27 for 256-QAM
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}
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tbs_info expected_result;
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TESTASSERT(test_mcs_tbs_dl_helper(cell_params, args, &expected_result) == SRSLTE_SUCCESS);
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CONDERROR(expected_result != tbs_info(tbs / 8, mcs),
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"TBS computation failure. {%d, %d}!={%d, %d}",
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expected_result.tbs_bytes * 8,
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expected_result.mcs,
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tbs,
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mcs);
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return SRSLTE_SUCCESS;
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}
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int test_mcs_lookup_specific()
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{
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/* TEST CASE: DL, no 256-QAM */
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// cqi=5,Nprb=1 -> {mcs=3, tbs_idx=3, tbs=40}
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TESTASSERT(assert_mcs_tbs_result(6, 5, 1, 40, 3) == SRSLTE_SUCCESS);
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TESTASSERT(assert_mcs_tbs_result(6, 5, 4, 256, 4) == SRSLTE_SUCCESS);
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TESTASSERT(assert_mcs_tbs_result(100, 9, 1, 712, 28) == SRSLTE_SUCCESS);
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TESTASSERT(assert_mcs_tbs_result(100, 10, 10, 5736, 25) == SRSLTE_SUCCESS);
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// cqi=15
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TESTASSERT(assert_mcs_tbs_result(6, 15, 1, 336, 19) == SRSLTE_SUCCESS); // I_tbs=17
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TESTASSERT(assert_mcs_tbs_result(6, 15, 6, 2152, 19) == SRSLTE_SUCCESS); // I_tbs=17
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TESTASSERT(assert_mcs_tbs_result(100, 15, 1, 712, 28) == SRSLTE_SUCCESS); // I_tbs=26
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TESTASSERT(assert_mcs_tbs_result(100, 15, 2, 1480, 28) == SRSLTE_SUCCESS); // I_tbs=26
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TESTASSERT(assert_mcs_tbs_result(100, 15, 10, 7480, 28) == SRSLTE_SUCCESS); // I_tbs=26
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TESTASSERT(assert_mcs_tbs_result(100, 15, 1, 968, 27, true) == SRSLTE_SUCCESS);
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return SRSLTE_SUCCESS;
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}
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/// Verify consistency of MCS,TBS computation for different permutations of banwidths, grant sizes, cqi, max_mcs
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int test_mcs_tbs_consistency_all()
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{
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uint32_t prb_list[] = {6, 15, 25, 50, 75, 100};
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sched_interface::sched_args_t sched_args = {};
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for (auto& nof_prb_cell : prb_list) {
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sched_interface::cell_cfg_t cell_cfg = generate_default_cell_cfg(nof_prb_cell);
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sched_cell_params_t cell_params = {};
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cell_params.set_cfg(0, cell_cfg, sched_args);
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for (uint32_t prb_grant = 1; prb_grant < nof_prb_cell; ++prb_grant) {
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for (uint32_t cqi = 1; cqi < 15; ++cqi) {
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for (uint32_t max_mcs = 1; max_mcs <= 28; ++max_mcs) {
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tbs_test_args args;
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args.tti_tx_dl = tti_point{1};
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args.prb_grant_size = prb_grant;
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args.cqi = cqi;
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args.max_mcs = max_mcs;
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TESTASSERT(test_mcs_tbs_dl_helper(cell_params, args, nullptr) == SRSLTE_SUCCESS);
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}
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}
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}
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}
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return SRSLTE_SUCCESS;
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}
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/**
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* Note: assumes lowest bound for nof of REs
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*/
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int test_min_mcs_tbs_dl_helper(const sched_cell_params_t& cell_params, const tbs_test_args& args, tbs_info* result)
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{
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uint32_t nof_re = cell_params.get_dl_lb_nof_re(args.tti_tx_dl, args.prb_grant_size);
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*result = compute_min_mcs_and_tbs_from_required_bytes(args.prb_grant_size,
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nof_re,
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args.cqi,
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args.max_mcs,
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args.req_bytes,
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args.is_ul,
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args.ul64qam_enabled,
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args.use_tbs_index_alt);
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tbs_info tb_max;
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TESTASSERT(test_mcs_tbs_dl_helper(cell_params, args, &tb_max) == SRSLTE_SUCCESS);
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CONDERROR(tb_max.mcs < result->mcs or tb_max.tbs_bytes < result->tbs_bytes, "Invalid min MCS calculation");
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if (args.verbose) {
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printf("Min: {tbs=%d, mcs=%d}. Max: {tbs=%d, mcs=%d}. Required tbs was %d\n",
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result->tbs_bytes * 8,
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result->mcs,
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tb_max.tbs_bytes * 8,
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tb_max.mcs,
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args.req_bytes * 8);
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}
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return SRSLTE_SUCCESS;
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}
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/// Test search for minimum MCS/TBS in TS 36.213 table 7.1.7.2.1-1 that fulfills a TBS >= required bytes
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int test_min_mcs_tbs_specific()
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{
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printf("--- Min MCS test ---\n");
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sched_cell_params_t cell_params = {};
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sched_interface::cell_cfg_t cell_cfg = generate_default_cell_cfg(100);
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sched_interface::sched_args_t sched_args = {};
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cell_params.set_cfg(0, cell_cfg, sched_args);
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tbs_test_args args;
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args.verbose = true;
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tbs_info result;
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args.cqi = 10;
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args.prb_grant_size = 5;
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args.req_bytes = 10;
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TESTASSERT(test_min_mcs_tbs_dl_helper(cell_params, args, &result) == SRSLTE_SUCCESS);
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CONDERROR(result.tbs_bytes < (int)args.req_bytes, "Invalid MCS calculation");
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CONDERROR(result.tbs_bytes * 8 != 120, "Invalid min TBS calculation");
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args.req_bytes = 50;
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TESTASSERT(test_min_mcs_tbs_dl_helper(cell_params, args, &result) == SRSLTE_SUCCESS);
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CONDERROR(result.tbs_bytes < (int)args.req_bytes, "Invalid MCS calculation");
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CONDERROR(result.tbs_bytes * 8 != 424, "Invalid min TBS calculation");
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args.cqi = 15;
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args.prb_grant_size = 10;
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args.req_bytes = 100;
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TESTASSERT(test_min_mcs_tbs_dl_helper(cell_params, args, &result) == SRSLTE_SUCCESS);
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CONDERROR(result.tbs_bytes < (int)args.req_bytes, "Invalid MCS calculation");
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CONDERROR(result.tbs_bytes * 8 != 872, "Invalid min TBS calculation");
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// Check equality case
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args.req_bytes = 109;
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TESTASSERT(test_min_mcs_tbs_dl_helper(cell_params, args, &result) == SRSLTE_SUCCESS);
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CONDERROR(result.tbs_bytes < (int)args.req_bytes, "Invalid MCS calculation");
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CONDERROR(result.tbs_bytes * 8 != 872, "Invalid min TBS calculation");
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return SRSLTE_SUCCESS;
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}
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} // namespace srsenb
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int main()
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{
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auto& mac_log = srslog::fetch_basic_logger("MAC");
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mac_log.set_level(srslog::basic_levels::info);
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auto& test_log = srslog::fetch_basic_logger("TEST");
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test_log.set_level(srslog::basic_levels::info);
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// Start the log backend.
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srslog::init();
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TESTASSERT(srsenb::test_mcs_lookup_specific() == SRSLTE_SUCCESS);
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TESTASSERT(srsenb::test_mcs_tbs_consistency_all() == SRSLTE_SUCCESS);
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TESTASSERT(srsenb::test_min_mcs_tbs_specific() == SRSLTE_SUCCESS);
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printf("Success\n");
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return 0;
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} |