/* * Copyright (C) 2013 by Holger Hans Peter Freyther * Copyright (C) 2021 by sysmocom - s.f.m.c. GmbH * Author: Pau Espin Pedrol * * All Rights Reserved * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . * */ #include #include #include #include "gprs_pcu.h" #include "bts.h" struct gprs_pcu *the_pcu; static struct osmo_tdef T_defs_pcu[] = { { .T=3113, .default_val=7, .unit=OSMO_TDEF_S, .desc="Timeout for paging", .val=0 }, { .T=3190, .default_val=5, .unit=OSMO_TDEF_S, .desc="Return to packet idle mode after Packet DL Assignment on CCCH (s)", .val=0}, { .T=3141, .default_val=10, .unit=OSMO_TDEF_S, .desc="Timeout for contention resolution procedure (s)", .val=0 }, { .T=3172, .default_val=5000, .unit=OSMO_TDEF_MS, .desc="Wait Indication used in Imm Ass Reject during TBF Establishment (PACCH)", .val=0, .min_val = 0, .max_val = 255000 }, /* TS 44.060 7.1.3.2.1 */ { .T=PCU_TDEF_NEIGH_RESOLVE_TO, .default_val=1000, .unit=OSMO_TDEF_MS, .desc="[ARFCN+BSIC]->[RAC+CI] resolution timeout (ms)", .val=0 }, { .T=PCU_TDEF_SI_RESOLVE_TO, .default_val=1000, .unit=OSMO_TDEF_MS, .desc="RIM RAN-INFO response timeout (ms)", .val=0 }, { .T=PCU_TDEF_NEIGH_CACHE_ALIVE, .default_val=5, .unit=OSMO_TDEF_S, .desc="[ARFCN+BSIC]->[RAC+CI] resolution cache entry storage timeout (s)", .val=0 }, { .T=PCU_TDEF_SI_CACHE_ALIVE, .default_val=5, .unit=OSMO_TDEF_S, .desc="[RAC+CI]->[SI] resolution cache entry storage timeout (s)", .val=0 }, { .T=-101, .default_val=30, .unit=OSMO_TDEF_S, .desc="BSSGP (un)blocking procedures timer (s)", .val=0 }, { .T=-102, .default_val=30, .unit=OSMO_TDEF_S, .desc="BSSGP reset procedure timer (s)", .val=0 }, { .T=-2000, .default_val=0, .unit=OSMO_TDEF_MS, .desc="Delay release of UL TBF after tx Packet Access Reject (PACCH) (ms)", .val=0 }, { .T=-2001, .default_val=2, .unit=OSMO_TDEF_S, .desc="DL TBF PACCH assignment timeout (s)", .val=0 }, { .T=-2002, .default_val=200, .unit=OSMO_TDEF_MS, .desc="Waiting after IMM.ASS confirm timer (ms)", .val=0 }, { .T=-2030, .default_val=60, .unit=OSMO_TDEF_S, .desc="Time to keep an idle MS object alive (s)", .val=0 }, /* slightly above T3314 (default 44s, 24.008, 11.2.2) */ { .T=-2031, .default_val=2000, .unit=OSMO_TDEF_MS, .desc="Time to keep an idle DL TBF alive (ms)", .val=0 }, { .T=0, .default_val=0, .unit=OSMO_TDEF_S, .desc=NULL, .val=0 } /* empty item at the end */ }; static void _update_stats_timer_cb(void *data) { struct gprs_pcu *pcu = (struct gprs_pcu *)data; struct gprs_rlcmac_bts *bts; llist_for_each_entry(bts, &pcu->bts_list, list) osmo_time_cc_set_flag(&bts->all_allocated_pdch, bts_all_pdch_allocated(bts)); osmo_timer_schedule(&pcu->update_stats_timer, 1, 0); } static int gprs_pcu_talloc_destructor(struct gprs_pcu *pcu) { struct gprs_rlcmac_bts *bts; while ((bts = llist_first_entry_or_null(&pcu->bts_list, struct gprs_rlcmac_bts, list))) talloc_free(bts); osmo_timer_del(&pcu->update_stats_timer); neigh_cache_free(pcu->neigh_cache); si_cache_free(pcu->si_cache); return 0; } struct gprs_pcu *gprs_pcu_alloc(void *ctx) { struct gprs_pcu *pcu; pcu = (struct gprs_pcu *)talloc_zero(ctx, struct gprs_pcu); OSMO_ASSERT(pcu); talloc_set_destructor(pcu, gprs_pcu_talloc_destructor); pcu->vty.fc_interval = 1; pcu->vty.max_cs_ul = MAX_GPRS_CS; pcu->vty.max_cs_dl = MAX_GPRS_CS; pcu->vty.max_mcs_ul = MAX_EDGE_MCS; pcu->vty.max_mcs_dl = MAX_EDGE_MCS; pcu->vty.force_alpha = (uint8_t)-1; /* don't force by default, use BTS SI13 provided value */ pcu->vty.dl_tbf_preemptive_retransmission = true; /* By default resegmentation is supported in DL can also be configured * through VTY */ pcu->vty.dl_arq_type = EGPRS_ARQ1; pcu->vty.cs_adj_enabled = true; pcu->vty.cs_adj_upper_limit = 33; /* Decrease CS if the error rate is above */ pcu->vty.cs_adj_lower_limit = 10; /* Increase CS if the error rate is below */ pcu->vty.cs_downgrade_threshold = 200; /* CS-1 to CS-4 */ pcu->vty.cs_lqual_ranges[0].low = -256; pcu->vty.cs_lqual_ranges[0].high = 6; pcu->vty.cs_lqual_ranges[1].low = 5; pcu->vty.cs_lqual_ranges[1].high = 8; pcu->vty.cs_lqual_ranges[2].low = 7; pcu->vty.cs_lqual_ranges[2].high = 13; pcu->vty.cs_lqual_ranges[3].low = 12; pcu->vty.cs_lqual_ranges[3].high = 256; /* MCS-1 to MCS-9 */ /* Default thresholds are referenced from literature */ /* Fig. 2.3, Chapter 2, Optimizing Wireless Communication Systems, Springer (2009) */ pcu->vty.mcs_lqual_ranges[0].low = -256; pcu->vty.mcs_lqual_ranges[0].high = 6; pcu->vty.mcs_lqual_ranges[1].low = 5; pcu->vty.mcs_lqual_ranges[1].high = 8; pcu->vty.mcs_lqual_ranges[2].low = 7; pcu->vty.mcs_lqual_ranges[2].high = 13; pcu->vty.mcs_lqual_ranges[3].low = 12; pcu->vty.mcs_lqual_ranges[3].high = 15; pcu->vty.mcs_lqual_ranges[4].low = 14; pcu->vty.mcs_lqual_ranges[4].high = 17; pcu->vty.mcs_lqual_ranges[5].low = 16; pcu->vty.mcs_lqual_ranges[5].high = 18; pcu->vty.mcs_lqual_ranges[6].low = 17; pcu->vty.mcs_lqual_ranges[6].high = 20; pcu->vty.mcs_lqual_ranges[7].low = 19; pcu->vty.mcs_lqual_ranges[7].high = 24; pcu->vty.mcs_lqual_ranges[8].low = 23; pcu->vty.mcs_lqual_ranges[8].high = 256; pcu->vty.ns_dialect = GPRS_NS2_DIALECT_IPACCESS; pcu->vty.ns_ip_dscp = -1; pcu->vty.ns_priority = -1; /* TODO: increase them when CRBB decoding is implemented */ pcu->vty.ws_base = 64; pcu->vty.ws_pdch = 0; pcu->vty.msclass_default = PCU_DEFAULT_MSLOT_CLASS; pcu->vty.llc_codel_interval_msec = LLC_CODEL_USE_DEFAULT; pcu->vty.llc_idle_ack_csec = 10; pcu->T_defs = T_defs_pcu; osmo_tdefs_reset(pcu->T_defs); INIT_LLIST_HEAD(&pcu->bts_list); pcu->neigh_cache = neigh_cache_alloc(pcu, osmo_tdef_get(pcu->T_defs, PCU_TDEF_NEIGH_CACHE_ALIVE, OSMO_TDEF_S, -1)); pcu->si_cache = si_cache_alloc(pcu, osmo_tdef_get(pcu->T_defs, PCU_TDEF_SI_CACHE_ALIVE, OSMO_TDEF_S, -1)); osmo_timer_setup(&pcu->update_stats_timer, _update_stats_timer_cb, pcu); osmo_timer_schedule(&pcu->update_stats_timer, 1, 0); return pcu; } struct gprs_rlcmac_bts *gprs_pcu_get_bts_by_nr(struct gprs_pcu *pcu, uint8_t bts_nr) { struct gprs_rlcmac_bts *pos; llist_for_each_entry(pos, &pcu->bts_list, list) { if (pos->nr == bts_nr) return pos; } return NULL; } struct gprs_rlcmac_bts *gprs_pcu_get_bts_by_cgi_ps(struct gprs_pcu *pcu, struct osmo_cell_global_id_ps *cgi_ps) { struct gprs_rlcmac_bts *pos; llist_for_each_entry(pos, &pcu->bts_list, list) { if (osmo_cgi_ps_cmp(&pos->cgi_ps, cgi_ps) == 0) return pos; } return NULL; } void gprs_pcu_set_initial_cs(struct gprs_pcu *pcu, uint8_t cs_dl, uint8_t cs_ul) { struct gprs_rlcmac_bts *bts; the_pcu->vty.initial_cs_dl = cs_dl; the_pcu->vty.initial_cs_ul = cs_ul; llist_for_each_entry(bts, &pcu->bts_list, list) { bts_recalc_initial_cs(bts); } } void gprs_pcu_set_initial_mcs(struct gprs_pcu *pcu, uint8_t mcs_dl, uint8_t mcs_ul) { struct gprs_rlcmac_bts *bts; the_pcu->vty.initial_mcs_dl = mcs_dl; the_pcu->vty.initial_mcs_ul = mcs_ul; llist_for_each_entry(bts, &pcu->bts_list, list) { bts_recalc_initial_mcs(bts); } } void gprs_pcu_set_max_cs(struct gprs_pcu *pcu, uint8_t cs_dl, uint8_t cs_ul) { struct gprs_rlcmac_bts *bts; the_pcu->vty.max_cs_dl = cs_dl; the_pcu->vty.max_cs_ul = cs_ul; llist_for_each_entry(bts, &pcu->bts_list, list) { bts_recalc_max_cs(bts); } } void gprs_pcu_set_max_mcs(struct gprs_pcu *pcu, uint8_t mcs_dl, uint8_t mcs_ul) { struct gprs_rlcmac_bts *bts; the_pcu->vty.max_mcs_dl = mcs_dl; the_pcu->vty.max_mcs_ul = mcs_ul; llist_for_each_entry(bts, &pcu->bts_list, list) { bts_recalc_max_mcs(bts); } }