149 lines
6.1 KiB
C
149 lines
6.1 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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*/
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/*! \file nr_mac_common.c
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* \brief Common MAC functions for NR UE and gNB
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* \author Florian Kaltenberger and Raymond Knopp
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* \date 2019
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* \version 0.1
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* \company Eurecom, NTUST
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* \email: florian.kalteberger@eurecom.fr, raymond.knopp@eurecom.fr
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* @ingroup _mac
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*/
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#include "LAYER2/NR_MAC_gNB/mac_proto.h"
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nr_bandentry_t nr_bandtable[] = {
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{1, 1920000, 1980000, 2110000, 2170000, 20, 422000},
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{2, 1850000, 1910000, 1930000, 1990000, 20, 386000},
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{3, 1710000, 1785000, 1805000, 1880000, 20, 361000},
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{5, 824000, 849000, 869000, 894000, 20, 173800},
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{7, 2500000, 2570000, 2620000, 2690000, 20, 524000},
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{8, 880000, 915000, 925000, 960000, 20, 185000},
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{12, 698000, 716000, 728000, 746000, 20, 145800},
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{20, 832000, 862000, 791000, 821000, 20, 158200},
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{25, 1850000, 1915000, 1930000, 1995000, 20, 386000},
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{28, 703000, 758000, 758000, 813000, 20, 151600},
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{34, 2010000, 2025000, 2010000, 2025000, 20, 402000},
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{38, 2570000, 2620000, 2570000, 2630000, 20, 514000},
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{39, 1880000, 1920000, 1880000, 1920000, 20, 376000},
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{40, 2300000, 2400000, 2300000, 2400000, 20, 460000},
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{41, 2496000, 2690000, 2496000, 2690000, 3, 499200},
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{50, 1432000, 1517000, 1432000, 1517000, 20, 286400},
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{51, 1427000, 1432000, 1427000, 1432000, 20, 285400},
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{66, 1710000, 1780000, 2110000, 2200000, 20, 422000},
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{70, 1695000, 1710000, 1995000, 2020000, 20, 399000},
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{71, 663000, 698000, 617000, 652000, 20, 123400},
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{74, 1427000, 1470000, 1475000, 1518000, 20, 295000},
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{75, 000, 000, 1432000, 1517000, 20, 286400},
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{76, 000, 000, 1427000, 1432000, 20, 285400},
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{77, 3300000, 4200000, 3300000, 4200000, 1, 620000},
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{78, 3300000, 3800000, 3300000, 3800000, 1, 620000},
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{79, 4400000, 5000000, 4400000, 5000000, 2, 693334},
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{80, 1710000, 1785000, 000, 000, 20, 342000},
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{81, 860000, 915000, 000, 000, 20, 176000},
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{82, 832000, 862000, 000, 000, 20, 166400},
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{83, 703000, 748000, 000, 000, 20, 140600},
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{84, 1920000, 1980000, 000, 000, 20, 384000},
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{86, 1710000, 1785000, 000, 000, 20, 342000}
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};
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void get_band(uint32_t downlink_frequency, uint8_t *current_band, int32_t *current_offset, lte_frame_type_t *current_type) {
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int ind;
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int64_t dl_freq_khz = downlink_frequency/1000;
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for ( ind=0;
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ind < sizeof(nr_bandtable) / sizeof(nr_bandtable[0]);
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ind++) {
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*current_band = nr_bandtable[ind].band;
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LOG_I(PHY, "Scanning band %d, dl_min %"PRIu64", ul_min %"PRIu64"\n", nr_bandtable[ind].band, nr_bandtable[ind].dl_min,nr_bandtable[ind].ul_min);
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if ( nr_bandtable[ind].dl_min <= dl_freq_khz && nr_bandtable[ind].dl_max >= dl_freq_khz ) {
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*current_offset = (nr_bandtable[ind].ul_min - nr_bandtable[ind].dl_min)*1000;
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if (*current_offset == 0)
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*current_type = TDD;
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else
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*current_type = FDD;
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LOG_I( PHY, "DL frequency %"PRIu32": band %d, frame_type %d, UL frequency %"PRIu32"\n",
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downlink_frequency, *current_band, *current_type, downlink_frequency+*current_offset);
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break;
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}
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}
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AssertFatal(ind != (sizeof(nr_bandtable) / sizeof(nr_bandtable[0])),
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"Can't find EUTRA band for frequency %d\n", downlink_frequency);
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}
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uint32_t to_nrarfcn(int nr_bandP, uint64_t dl_CarrierFreq, uint32_t bw)
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{
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uint64_t dl_CarrierFreq_by_1k = dl_CarrierFreq / 1000;
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int bw_kHz = bw / 1000;
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int i;
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LOG_I(MAC,"Searching for nr band %d DL Carrier frequency %llu bw %u\n",nr_bandP,(long long unsigned int)dl_CarrierFreq,bw);
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AssertFatal(nr_bandP < 86, "nr_band %d > 86\n", nr_bandP);
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for (i = 0; i < 30 && nr_bandtable[i].band != nr_bandP; i++);
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AssertFatal(dl_CarrierFreq_by_1k >= nr_bandtable[i].dl_min,
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"Band %d, bw %u : DL carrier frequency %llu kHz < %llu\n",
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nr_bandP, bw, (long long unsigned int)dl_CarrierFreq_by_1k,
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(long long unsigned int)nr_bandtable[i].dl_min);
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AssertFatal(dl_CarrierFreq_by_1k <=
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(nr_bandtable[i].dl_max - bw_kHz),
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"Band %d, dl_CarrierFreq %llu bw %u: DL carrier frequency %llu kHz > %llu\n",
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nr_bandP, (long long unsigned int)dl_CarrierFreq,bw, (long long unsigned int)dl_CarrierFreq_by_1k,
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(long long unsigned int)(nr_bandtable[i].dl_max - bw_kHz));
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int deltaFglobal;
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if (dl_CarrierFreq < 3e9) deltaFglobal = 5;
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else deltaFglobal = 15;
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// This is equation before Table 5.4.2.1-1 in 38101-1-f30
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// F_REF=F_REF_Offs + deltaF_Global(N_REF-NREF_REF_Offs)
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return (((dl_CarrierFreq_by_1k - nr_bandtable[i].dl_min)/deltaFglobal) +
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nr_bandtable[i].N_OFFs_DL);
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}
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uint64_t from_nrarfcn(int nr_bandP, uint32_t dl_nrarfcn)
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{
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int i;
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int deltaFglobal;
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if (nr_bandP < 77 || nr_bandP > 79) deltaFglobal = 5;
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else deltaFglobal = 15;
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AssertFatal(nr_bandP < 87, "nr_band %d > 86\n", nr_bandP);
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for (i = 0; i < 31 && nr_bandtable[i].band != nr_bandP; i++);
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AssertFatal(dl_nrarfcn>=nr_bandtable[i].N_OFFs_DL,"dl_nrarfcn %u < N_OFFs_DL %llu\n",dl_nrarfcn, (long long unsigned int)nr_bandtable[i].N_OFFs_DL);
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return 1000*(nr_bandtable[i].dl_min + (dl_nrarfcn - nr_bandtable[i].N_OFFs_DL) * deltaFglobal);
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}
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