Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 1 | /* gprs_ms.cpp |
| 2 | * |
| 3 | * Copyright (C) 2015 by Sysmocom s.f.m.c. GmbH |
| 4 | * Author: Jacob Erlbeck <jerlbeck@sysmocom.de> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version 2 |
| 9 | * of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 19 | */ |
| 20 | |
| 21 | |
| 22 | #include "gprs_ms.h" |
Jacob Erlbeck | a700dd9 | 2015-06-02 16:00:41 +0200 | [diff] [blame] | 23 | #include "bts.h" |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 24 | #include "tbf.h" |
Pau Espin Pedrol | 9d1cdb1 | 2019-09-25 17:47:02 +0200 | [diff] [blame] | 25 | #include "tbf_ul.h" |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 26 | #include "gprs_debug.h" |
Jacob Erlbeck | d4ad731 | 2015-07-17 16:39:09 +0200 | [diff] [blame] | 27 | #include "gprs_codel.h" |
Jacob Erlbeck | 7c72aca | 2016-01-22 17:06:14 +0100 | [diff] [blame] | 28 | #include "pcu_utils.h" |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 29 | |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 30 | #include <time.h> |
| 31 | |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 32 | extern "C" { |
| 33 | #include <osmocom/core/talloc.h> |
| 34 | #include <osmocom/core/utils.h> |
Pau Espin Pedrol | 1de6873 | 2020-03-11 14:04:52 +0100 | [diff] [blame] | 35 | #include <osmocom/core/timer.h> |
Max | 9bbe160 | 2016-07-18 12:50:18 +0200 | [diff] [blame] | 36 | #include <osmocom/gsm/protocol/gsm_04_08.h> |
Vadim Yanitskiy | cb98894 | 2020-11-08 13:27:35 +0700 | [diff] [blame] | 37 | #include <osmocom/gsm/gsm48.h> |
Max | 1187a77 | 2018-01-26 13:31:42 +0100 | [diff] [blame] | 38 | #include <osmocom/core/logging.h> |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 39 | #include "coding_scheme.h" |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 40 | } |
| 41 | |
Jacob Erlbeck | 1c3b899 | 2015-08-14 16:01:36 +0200 | [diff] [blame] | 42 | #define GPRS_CODEL_SLOW_INTERVAL_MS 4000 |
Jacob Erlbeck | d4ad731 | 2015-07-17 16:39:09 +0200 | [diff] [blame] | 43 | |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 44 | extern void *tall_pcu_ctx; |
| 45 | |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 46 | static int64_t now_msec() |
| 47 | { |
| 48 | struct timespec ts; |
Pau Espin Pedrol | 1de6873 | 2020-03-11 14:04:52 +0100 | [diff] [blame] | 49 | osmo_clock_gettime(CLOCK_MONOTONIC, &ts); |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 50 | |
| 51 | return int64_t(ts.tv_sec) * 1000 + ts.tv_nsec / 1000000; |
| 52 | } |
| 53 | |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 54 | struct GprsMsDefaultCallback: public GprsMs::Callback { |
| 55 | virtual void ms_idle(class GprsMs *ms) { |
| 56 | delete ms; |
| 57 | } |
| 58 | virtual void ms_active(class GprsMs *) {} |
| 59 | }; |
| 60 | |
| 61 | static GprsMsDefaultCallback gprs_default_cb; |
| 62 | |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 63 | GprsMs::Guard::Guard(GprsMs *ms) : |
| 64 | m_ms(ms ? ms->ref() : NULL) |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 65 | { |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 66 | } |
| 67 | |
| 68 | GprsMs::Guard::~Guard() |
| 69 | { |
| 70 | if (m_ms) |
| 71 | m_ms->unref(); |
| 72 | } |
| 73 | |
Jacob Erlbeck | b2439bb | 2015-07-13 14:23:32 +0200 | [diff] [blame] | 74 | bool GprsMs::Guard::is_idle() const |
| 75 | { |
| 76 | if (!m_ms) |
| 77 | return true; |
| 78 | |
| 79 | return !m_ms->m_ul_tbf && !m_ms->m_dl_tbf && m_ms->m_ref == 1; |
| 80 | } |
| 81 | |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 82 | void GprsMs::timeout(void *priv_) |
| 83 | { |
| 84 | GprsMs *ms = static_cast<GprsMs *>(priv_); |
| 85 | |
| 86 | LOGP(DRLCMAC, LOGL_INFO, "Timeout for MS object, TLLI = 0x%08x\n", |
| 87 | ms->tlli()); |
| 88 | |
| 89 | if (ms->m_timer.data) { |
| 90 | ms->m_timer.data = NULL; |
| 91 | ms->unref(); |
| 92 | } |
| 93 | } |
| 94 | |
Jacob Erlbeck | 17214bb | 2015-06-02 14:06:12 +0200 | [diff] [blame] | 95 | GprsMs::GprsMs(BTS *bts, uint32_t tlli) : |
| 96 | m_bts(bts), |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 97 | m_cb(&gprs_default_cb), |
| 98 | m_ul_tbf(NULL), |
| 99 | m_dl_tbf(NULL), |
| 100 | m_tlli(tlli), |
Vadim Yanitskiy | cb98894 | 2020-11-08 13:27:35 +0700 | [diff] [blame] | 101 | m_new_ul_tlli(GSM_RESERVED_TMSI), |
| 102 | m_new_dl_tlli(GSM_RESERVED_TMSI), |
Max | 9bbe160 | 2016-07-18 12:50:18 +0200 | [diff] [blame] | 103 | m_ta(GSM48_TA_INVALID), |
Jacob Erlbeck | befc760 | 2015-06-02 12:33:30 +0200 | [diff] [blame] | 104 | m_ms_class(0), |
Jacob Erlbeck | c3c5804 | 2015-09-28 17:55:32 +0200 | [diff] [blame] | 105 | m_egprs_ms_class(0), |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 106 | m_current_cs_ul(UNKNOWN), |
| 107 | m_current_cs_dl(UNKNOWN), |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 108 | m_is_idle(true), |
Jacob Erlbeck | 5367086 | 2015-05-12 17:54:33 +0200 | [diff] [blame] | 109 | m_ref(0), |
Jacob Erlbeck | 25db7c6 | 2015-06-11 12:59:01 +0200 | [diff] [blame] | 110 | m_list(this), |
Jacob Erlbeck | 04a1086 | 2015-06-12 16:01:56 +0200 | [diff] [blame] | 111 | m_delay(0), |
Jacob Erlbeck | 23f93a1 | 2015-06-30 08:52:54 +0200 | [diff] [blame] | 112 | m_nack_rate_dl(0), |
| 113 | m_reserved_dl_slots(0), |
| 114 | m_reserved_ul_slots(0), |
Jacob Erlbeck | d4ad731 | 2015-07-17 16:39:09 +0200 | [diff] [blame] | 115 | m_current_trx(NULL), |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 116 | m_codel_state(NULL), |
Max | a4de02d | 2019-03-13 16:35:09 +0100 | [diff] [blame] | 117 | m_mode(GPRS), |
sivasankari | da7250a | 2016-12-16 12:57:18 +0530 | [diff] [blame] | 118 | m_dl_ctrl_msg(0) |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 119 | { |
Jacob Erlbeck | d4ad731 | 2015-07-17 16:39:09 +0200 | [diff] [blame] | 120 | int codel_interval = LLC_CODEL_USE_DEFAULT; |
| 121 | |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 122 | LOGP(DRLCMAC, LOGL_INFO, "Creating MS object, TLLI = 0x%08x\n", tlli); |
Jacob Erlbeck | b0e5eaf | 2015-05-21 11:07:16 +0200 | [diff] [blame] | 123 | |
Pau Espin Pedrol | 43f0bce | 2020-06-26 13:09:44 +0200 | [diff] [blame] | 124 | m_imsi[0] = '\0'; |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 125 | memset(&m_timer, 0, sizeof(m_timer)); |
| 126 | m_timer.cb = GprsMs::timeout; |
Jacob Erlbeck | 489a2b3 | 2015-05-28 19:07:01 +0200 | [diff] [blame] | 127 | m_llc_queue.init(); |
Jacob Erlbeck | a700dd9 | 2015-06-02 16:00:41 +0200 | [diff] [blame] | 128 | |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 129 | set_mode(m_mode); |
Jacob Erlbeck | d4ad731 | 2015-07-17 16:39:09 +0200 | [diff] [blame] | 130 | |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 131 | if (m_bts) |
Jacob Erlbeck | d4ad731 | 2015-07-17 16:39:09 +0200 | [diff] [blame] | 132 | codel_interval = m_bts->bts_data()->llc_codel_interval_msec; |
Jacob Erlbeck | d4ad731 | 2015-07-17 16:39:09 +0200 | [diff] [blame] | 133 | |
| 134 | if (codel_interval) { |
| 135 | if (codel_interval == LLC_CODEL_USE_DEFAULT) |
| 136 | codel_interval = GPRS_CODEL_SLOW_INTERVAL_MS; |
| 137 | m_codel_state = talloc(this, struct gprs_codel); |
| 138 | gprs_codel_init(m_codel_state); |
| 139 | gprs_codel_set_interval(m_codel_state, codel_interval); |
Jacob Erlbeck | a700dd9 | 2015-06-02 16:00:41 +0200 | [diff] [blame] | 140 | } |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 141 | m_last_cs_not_low = now_msec(); |
Oliver Smith | cfb6321 | 2019-09-05 17:13:33 +0200 | [diff] [blame] | 142 | app_info_pending = false; |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 143 | } |
| 144 | |
| 145 | GprsMs::~GprsMs() |
| 146 | { |
Jacob Erlbeck | 6835cea | 2015-08-21 15:24:02 +0200 | [diff] [blame] | 147 | LListHead<gprs_rlcmac_tbf> *pos, *tmp; |
| 148 | |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 149 | LOGP(DRLCMAC, LOGL_INFO, "Destroying MS object, TLLI = 0x%08x\n", tlli()); |
Jacob Erlbeck | fecece0 | 2015-05-08 12:13:08 +0200 | [diff] [blame] | 150 | |
Jacob Erlbeck | 23f93a1 | 2015-06-30 08:52:54 +0200 | [diff] [blame] | 151 | set_reserved_slots(NULL, 0, 0); |
| 152 | |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 153 | if (osmo_timer_pending(&m_timer)) |
| 154 | osmo_timer_del(&m_timer); |
| 155 | |
Jacob Erlbeck | fecece0 | 2015-05-08 12:13:08 +0200 | [diff] [blame] | 156 | if (m_ul_tbf) { |
| 157 | m_ul_tbf->set_ms(NULL); |
| 158 | m_ul_tbf = NULL; |
| 159 | } |
| 160 | |
| 161 | if (m_dl_tbf) { |
| 162 | m_dl_tbf->set_ms(NULL); |
| 163 | m_dl_tbf = NULL; |
| 164 | } |
Jacob Erlbeck | 6835cea | 2015-08-21 15:24:02 +0200 | [diff] [blame] | 165 | |
| 166 | llist_for_each_safe(pos, tmp, &m_old_tbfs) |
| 167 | pos->entry()->set_ms(NULL); |
| 168 | |
Jacob Erlbeck | 17214bb | 2015-06-02 14:06:12 +0200 | [diff] [blame] | 169 | m_llc_queue.clear(m_bts); |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 170 | } |
| 171 | |
| 172 | void* GprsMs::operator new(size_t size) |
| 173 | { |
| 174 | static void *tall_ms_ctx = NULL; |
| 175 | if (!tall_ms_ctx) |
| 176 | tall_ms_ctx = talloc_named_const(tall_pcu_ctx, 0, __PRETTY_FUNCTION__); |
| 177 | |
| 178 | return talloc_size(tall_ms_ctx, size); |
| 179 | } |
| 180 | |
| 181 | void GprsMs::operator delete(void* p) |
| 182 | { |
| 183 | talloc_free(p); |
| 184 | } |
| 185 | |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 186 | GprsMs *GprsMs::ref() |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 187 | { |
| 188 | m_ref += 1; |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 189 | return this; |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | void GprsMs::unref() |
| 193 | { |
| 194 | OSMO_ASSERT(m_ref >= 0); |
| 195 | m_ref -= 1; |
| 196 | if (m_ref == 0) |
| 197 | update_status(); |
| 198 | } |
| 199 | |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 200 | void GprsMs::start_timer() |
| 201 | { |
| 202 | if (m_delay == 0) |
| 203 | return; |
| 204 | |
| 205 | if (!m_timer.data) |
| 206 | m_timer.data = ref(); |
| 207 | |
| 208 | osmo_timer_schedule(&m_timer, m_delay, 0); |
| 209 | } |
| 210 | |
| 211 | void GprsMs::stop_timer() |
| 212 | { |
| 213 | if (!m_timer.data) |
| 214 | return; |
| 215 | |
| 216 | osmo_timer_del(&m_timer); |
| 217 | m_timer.data = NULL; |
| 218 | unref(); |
| 219 | } |
| 220 | |
Max | a4de02d | 2019-03-13 16:35:09 +0100 | [diff] [blame] | 221 | void GprsMs::set_mode(enum mcs_kind mode) |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 222 | { |
| 223 | m_mode = mode; |
| 224 | |
Jacob Erlbeck | 53bc186 | 2016-01-18 17:23:09 +0100 | [diff] [blame] | 225 | if (!m_bts) |
| 226 | return; |
| 227 | |
Holger Hans Peter Freyther | 99db40a | 2016-03-04 18:19:02 +0100 | [diff] [blame] | 228 | switch (m_mode) { |
Max | a4de02d | 2019-03-13 16:35:09 +0100 | [diff] [blame] | 229 | case GPRS: |
Max | 8a8e0fb | 2019-03-25 16:32:50 +0100 | [diff] [blame] | 230 | if (!mcs_is_gprs(m_current_cs_ul)) { |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 231 | m_current_cs_ul = mcs_get_gprs_by_num( |
Holger Hans Peter Freyther | 99db40a | 2016-03-04 18:19:02 +0100 | [diff] [blame] | 232 | m_bts->bts_data()->initial_cs_ul); |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 233 | if (!mcs_is_valid(m_current_cs_ul)) |
Max | bea2edb | 2019-03-06 17:04:59 +0100 | [diff] [blame] | 234 | m_current_cs_ul = CS1; |
Holger Hans Peter Freyther | 99db40a | 2016-03-04 18:19:02 +0100 | [diff] [blame] | 235 | } |
Max | 8a8e0fb | 2019-03-25 16:32:50 +0100 | [diff] [blame] | 236 | if (!mcs_is_gprs(m_current_cs_dl)) { |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 237 | m_current_cs_dl = mcs_get_gprs_by_num( |
Holger Hans Peter Freyther | 99db40a | 2016-03-04 18:19:02 +0100 | [diff] [blame] | 238 | m_bts->bts_data()->initial_cs_dl); |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 239 | if (!mcs_is_valid(m_current_cs_dl)) |
Max | bea2edb | 2019-03-06 17:04:59 +0100 | [diff] [blame] | 240 | m_current_cs_dl = CS1; |
Holger Hans Peter Freyther | 99db40a | 2016-03-04 18:19:02 +0100 | [diff] [blame] | 241 | } |
| 242 | break; |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 243 | |
Max | a4de02d | 2019-03-13 16:35:09 +0100 | [diff] [blame] | 244 | case EGPRS_GMSK: |
| 245 | case EGPRS: |
Max | 8a8e0fb | 2019-03-25 16:32:50 +0100 | [diff] [blame] | 246 | if (!mcs_is_edge(m_current_cs_ul)) { |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 247 | m_current_cs_ul = mcs_get_egprs_by_num( |
Holger Hans Peter Freyther | 99db40a | 2016-03-04 18:19:02 +0100 | [diff] [blame] | 248 | m_bts->bts_data()->initial_mcs_ul); |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 249 | if (!mcs_is_valid(m_current_cs_ul)) |
Max | bea2edb | 2019-03-06 17:04:59 +0100 | [diff] [blame] | 250 | m_current_cs_ul = MCS1; |
Holger Hans Peter Freyther | 99db40a | 2016-03-04 18:19:02 +0100 | [diff] [blame] | 251 | } |
Max | 8a8e0fb | 2019-03-25 16:32:50 +0100 | [diff] [blame] | 252 | if (!mcs_is_edge(m_current_cs_dl)) { |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 253 | m_current_cs_dl = mcs_get_egprs_by_num( |
Holger Hans Peter Freyther | 99db40a | 2016-03-04 18:19:02 +0100 | [diff] [blame] | 254 | m_bts->bts_data()->initial_mcs_dl); |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 255 | if (!mcs_is_valid(m_current_cs_dl)) |
Max | bea2edb | 2019-03-06 17:04:59 +0100 | [diff] [blame] | 256 | m_current_cs_dl = MCS1; |
Holger Hans Peter Freyther | 99db40a | 2016-03-04 18:19:02 +0100 | [diff] [blame] | 257 | } |
| 258 | break; |
| 259 | } |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 260 | } |
| 261 | |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 262 | void GprsMs::attach_tbf(struct gprs_rlcmac_tbf *tbf) |
| 263 | { |
| 264 | if (tbf->direction == GPRS_RLCMAC_DL_TBF) |
Jacob Erlbeck | aa9daa1 | 2015-12-28 18:49:12 +0100 | [diff] [blame] | 265 | attach_dl_tbf(as_dl_tbf(tbf)); |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 266 | else |
Jacob Erlbeck | aa9daa1 | 2015-12-28 18:49:12 +0100 | [diff] [blame] | 267 | attach_ul_tbf(as_ul_tbf(tbf)); |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 268 | } |
| 269 | |
| 270 | void GprsMs::attach_ul_tbf(struct gprs_rlcmac_ul_tbf *tbf) |
| 271 | { |
| 272 | if (m_ul_tbf == tbf) |
| 273 | return; |
| 274 | |
| 275 | LOGP(DRLCMAC, LOGL_INFO, "Attaching TBF to MS object, TLLI = 0x%08x, TBF = %s\n", |
| 276 | tlli(), tbf->name()); |
| 277 | |
| 278 | Guard guard(this); |
| 279 | |
| 280 | if (m_ul_tbf) |
Jacob Erlbeck | 6835cea | 2015-08-21 15:24:02 +0200 | [diff] [blame] | 281 | llist_add_tail(&m_ul_tbf->ms_list(), &m_old_tbfs); |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 282 | |
| 283 | m_ul_tbf = tbf; |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 284 | |
| 285 | if (tbf) |
| 286 | stop_timer(); |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 287 | } |
| 288 | |
| 289 | void GprsMs::attach_dl_tbf(struct gprs_rlcmac_dl_tbf *tbf) |
| 290 | { |
| 291 | if (m_dl_tbf == tbf) |
| 292 | return; |
| 293 | |
| 294 | LOGP(DRLCMAC, LOGL_INFO, "Attaching TBF to MS object, TLLI = 0x%08x, TBF = %s\n", |
| 295 | tlli(), tbf->name()); |
| 296 | |
| 297 | Guard guard(this); |
| 298 | |
| 299 | if (m_dl_tbf) |
Jacob Erlbeck | 6835cea | 2015-08-21 15:24:02 +0200 | [diff] [blame] | 300 | llist_add_tail(&m_dl_tbf->ms_list(), &m_old_tbfs); |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 301 | |
| 302 | m_dl_tbf = tbf; |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 303 | |
| 304 | if (tbf) |
| 305 | stop_timer(); |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 306 | } |
| 307 | |
| 308 | void GprsMs::detach_tbf(gprs_rlcmac_tbf *tbf) |
| 309 | { |
Jacob Erlbeck | 6835cea | 2015-08-21 15:24:02 +0200 | [diff] [blame] | 310 | if (tbf == static_cast<gprs_rlcmac_tbf *>(m_ul_tbf)) { |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 311 | m_ul_tbf = NULL; |
Jacob Erlbeck | 6835cea | 2015-08-21 15:24:02 +0200 | [diff] [blame] | 312 | } else if (tbf == static_cast<gprs_rlcmac_tbf *>(m_dl_tbf)) { |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 313 | m_dl_tbf = NULL; |
Jacob Erlbeck | 6835cea | 2015-08-21 15:24:02 +0200 | [diff] [blame] | 314 | } else { |
| 315 | bool found = false; |
| 316 | |
| 317 | LListHead<gprs_rlcmac_tbf> *pos, *tmp; |
| 318 | llist_for_each_safe(pos, tmp, &m_old_tbfs) { |
| 319 | if (pos->entry() == tbf) { |
| 320 | llist_del(pos); |
| 321 | found = true; |
| 322 | break; |
| 323 | } |
| 324 | } |
| 325 | |
| 326 | /* Protect against recursive calls via set_ms() */ |
| 327 | if (!found) |
| 328 | return; |
| 329 | } |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 330 | |
| 331 | LOGP(DRLCMAC, LOGL_INFO, "Detaching TBF from MS object, TLLI = 0x%08x, TBF = %s\n", |
| 332 | tlli(), tbf->name()); |
| 333 | |
Jacob Erlbeck | fecece0 | 2015-05-08 12:13:08 +0200 | [diff] [blame] | 334 | if (tbf->ms() == this) |
| 335 | tbf->set_ms(NULL); |
| 336 | |
Jacob Erlbeck | 23f93a1 | 2015-06-30 08:52:54 +0200 | [diff] [blame] | 337 | if (!m_dl_tbf && !m_ul_tbf) { |
| 338 | set_reserved_slots(NULL, 0, 0); |
| 339 | |
| 340 | if (tlli() != 0) |
| 341 | start_timer(); |
| 342 | } |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 343 | |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 344 | update_status(); |
| 345 | } |
| 346 | |
| 347 | void GprsMs::update_status() |
| 348 | { |
| 349 | if (m_ref > 0) |
| 350 | return; |
| 351 | |
| 352 | if (is_idle() && !m_is_idle) { |
| 353 | m_is_idle = true; |
| 354 | m_cb->ms_idle(this); |
| 355 | /* this can be deleted by now, do not access it */ |
| 356 | return; |
| 357 | } |
| 358 | |
| 359 | if (!is_idle() && m_is_idle) { |
| 360 | m_is_idle = false; |
| 361 | m_cb->ms_active(this); |
| 362 | } |
| 363 | } |
| 364 | |
Jacob Erlbeck | ac28905 | 2015-08-14 12:50:54 +0200 | [diff] [blame] | 365 | void GprsMs::reset() |
| 366 | { |
| 367 | LOGP(DRLCMAC, LOGL_INFO, |
| 368 | "Clearing MS object, TLLI: 0x%08x, IMSI: '%s'\n", |
| 369 | tlli(), imsi()); |
| 370 | |
| 371 | stop_timer(); |
| 372 | |
Vadim Yanitskiy | cb98894 | 2020-11-08 13:27:35 +0700 | [diff] [blame] | 373 | m_tlli = GSM_RESERVED_TMSI; |
| 374 | m_new_dl_tlli = m_tlli; |
| 375 | m_new_ul_tlli = m_tlli; |
Jacob Erlbeck | ac28905 | 2015-08-14 12:50:54 +0200 | [diff] [blame] | 376 | m_imsi[0] = '\0'; |
| 377 | } |
| 378 | |
Jacob Erlbeck | 2b349b5 | 2015-08-18 11:55:03 +0200 | [diff] [blame] | 379 | void GprsMs::merge_old_ms(GprsMs *old_ms) |
| 380 | { |
Pau Espin Pedrol | 528820d | 2020-10-26 12:40:11 +0100 | [diff] [blame] | 381 | OSMO_ASSERT(old_ms != this); |
Jacob Erlbeck | 2b349b5 | 2015-08-18 11:55:03 +0200 | [diff] [blame] | 382 | |
| 383 | if (strlen(imsi()) == 0 && strlen(old_ms->imsi()) != 0) |
Pau Espin Pedrol | 528820d | 2020-10-26 12:40:11 +0100 | [diff] [blame] | 384 | osmo_strlcpy(m_imsi, old_ms->imsi(), sizeof(m_imsi)); |
Jacob Erlbeck | 2b349b5 | 2015-08-18 11:55:03 +0200 | [diff] [blame] | 385 | |
| 386 | if (!ms_class() && old_ms->ms_class()) |
| 387 | set_ms_class(old_ms->ms_class()); |
| 388 | |
Pau Espin Pedrol | cbf05f5 | 2020-06-26 14:16:47 +0200 | [diff] [blame] | 389 | if (!egprs_ms_class() && old_ms->egprs_ms_class()) |
| 390 | set_egprs_ms_class(old_ms->egprs_ms_class()); |
| 391 | |
Jacob Erlbeck | e0b21f4 | 2015-08-21 18:30:05 +0200 | [diff] [blame] | 392 | m_llc_queue.move_and_merge(&old_ms->m_llc_queue); |
| 393 | |
Jacob Erlbeck | 2b349b5 | 2015-08-18 11:55:03 +0200 | [diff] [blame] | 394 | old_ms->reset(); |
| 395 | } |
| 396 | |
Pau Espin Pedrol | 528820d | 2020-10-26 12:40:11 +0100 | [diff] [blame] | 397 | void GprsMs::merge_and_clear_ms(GprsMs *old_ms) |
| 398 | { |
| 399 | OSMO_ASSERT(old_ms != this); |
| 400 | |
| 401 | GprsMs::Guard guard_old(old_ms); |
| 402 | |
| 403 | /* Clean up the old MS object */ |
| 404 | /* TODO: Use timer? */ |
| 405 | if (old_ms->ul_tbf() && !old_ms->ul_tbf()->timers_pending(T_MAX)) |
| 406 | tbf_free(old_ms->ul_tbf()); |
| 407 | if (old_ms->dl_tbf() && !old_ms->dl_tbf()->timers_pending(T_MAX)) |
| 408 | tbf_free(old_ms->dl_tbf()); |
| 409 | |
| 410 | merge_old_ms(old_ms); |
| 411 | } |
| 412 | |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 413 | void GprsMs::set_tlli(uint32_t tlli) |
| 414 | { |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 415 | if (tlli == m_tlli || tlli == m_new_ul_tlli) |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 416 | return; |
| 417 | |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 418 | if (tlli != m_new_dl_tlli) { |
| 419 | LOGP(DRLCMAC, LOGL_INFO, |
| 420 | "Modifying MS object, UL TLLI: 0x%08x -> 0x%08x, " |
| 421 | "not yet confirmed\n", |
| 422 | this->tlli(), tlli); |
| 423 | m_new_ul_tlli = tlli; |
| 424 | return; |
| 425 | } |
| 426 | |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 427 | LOGP(DRLCMAC, LOGL_INFO, |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 428 | "Modifying MS object, TLLI: 0x%08x -> 0x%08x, " |
| 429 | "already confirmed partly\n", |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 430 | m_tlli, tlli); |
| 431 | |
| 432 | m_tlli = tlli; |
Vadim Yanitskiy | cb98894 | 2020-11-08 13:27:35 +0700 | [diff] [blame] | 433 | m_new_dl_tlli = GSM_RESERVED_TMSI; |
| 434 | m_new_ul_tlli = GSM_RESERVED_TMSI; |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 435 | } |
| 436 | |
| 437 | bool GprsMs::confirm_tlli(uint32_t tlli) |
| 438 | { |
| 439 | if (tlli == m_tlli || tlli == m_new_dl_tlli) |
| 440 | return false; |
| 441 | |
| 442 | if (tlli != m_new_ul_tlli) { |
| 443 | /* The MS has not sent a message with the new TLLI, which may |
| 444 | * happen according to the spec [TODO: add reference]. */ |
| 445 | |
| 446 | LOGP(DRLCMAC, LOGL_INFO, |
| 447 | "The MS object cannot fully confirm an unexpected TLLI: 0x%08x, " |
| 448 | "partly confirmed\n", tlli); |
| 449 | /* Use the network's idea of TLLI as candidate, this does not |
| 450 | * change the result value of tlli() */ |
| 451 | m_new_dl_tlli = tlli; |
| 452 | return false; |
| 453 | } |
| 454 | |
| 455 | LOGP(DRLCMAC, LOGL_INFO, |
| 456 | "Modifying MS object, TLLI: 0x%08x confirmed\n", tlli); |
| 457 | |
| 458 | m_tlli = tlli; |
Vadim Yanitskiy | cb98894 | 2020-11-08 13:27:35 +0700 | [diff] [blame] | 459 | m_new_dl_tlli = GSM_RESERVED_TMSI; |
| 460 | m_new_ul_tlli = GSM_RESERVED_TMSI; |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 461 | |
| 462 | return true; |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 463 | } |
Jacob Erlbeck | b0e5eaf | 2015-05-21 11:07:16 +0200 | [diff] [blame] | 464 | |
| 465 | void GprsMs::set_imsi(const char *imsi) |
| 466 | { |
| 467 | if (!imsi) { |
| 468 | LOGP(DRLCMAC, LOGL_ERROR, "Expected IMSI!\n"); |
| 469 | return; |
| 470 | } |
| 471 | |
| 472 | if (imsi[0] && strlen(imsi) < 3) { |
| 473 | LOGP(DRLCMAC, LOGL_ERROR, "No valid IMSI '%s'!\n", |
| 474 | imsi); |
| 475 | return; |
| 476 | } |
| 477 | |
| 478 | if (strcmp(imsi, m_imsi) == 0) |
| 479 | return; |
| 480 | |
| 481 | LOGP(DRLCMAC, LOGL_INFO, |
| 482 | "Modifying MS object, TLLI = 0x%08x, IMSI '%s' -> '%s'\n", |
| 483 | tlli(), m_imsi, imsi); |
| 484 | |
Pau Espin Pedrol | 528820d | 2020-10-26 12:40:11 +0100 | [diff] [blame] | 485 | GprsMs *old_ms = m_bts->ms_store().get_ms(0, 0, imsi); |
| 486 | /* Check if we are going to store a different MS object with already |
| 487 | existing IMSI. This is probably a bug in code calling this function, |
| 488 | since it should take care of this explicitly */ |
| 489 | if (old_ms) { |
| 490 | /* We cannot find m_ms by IMSI since we know that it has a |
| 491 | * different IMSI */ |
| 492 | OSMO_ASSERT(old_ms != this); |
| 493 | |
| 494 | LOGPMS(this, DRLCMAC, LOGL_NOTICE, |
| 495 | "IMSI '%s' was already assigned to another " |
| 496 | "MS object: TLLI = 0x%08x, that IMSI will be removed\n", |
| 497 | imsi, old_ms->tlli()); |
| 498 | |
| 499 | merge_and_clear_ms(old_ms); |
| 500 | } |
| 501 | |
| 502 | |
Pau Espin Pedrol | 43f0bce | 2020-06-26 13:09:44 +0200 | [diff] [blame] | 503 | osmo_strlcpy(m_imsi, imsi, sizeof(m_imsi)); |
Jacob Erlbeck | b0e5eaf | 2015-05-21 11:07:16 +0200 | [diff] [blame] | 504 | } |
| 505 | |
Jacob Erlbeck | 9200ce6 | 2015-05-22 17:48:04 +0200 | [diff] [blame] | 506 | void GprsMs::set_ta(uint8_t ta_) |
| 507 | { |
| 508 | if (ta_ == m_ta) |
| 509 | return; |
| 510 | |
Max | 9bbe160 | 2016-07-18 12:50:18 +0200 | [diff] [blame] | 511 | if (gsm48_ta_is_valid(ta_)) { |
| 512 | LOGP(DRLCMAC, LOGL_INFO, |
| 513 | "Modifying MS object, TLLI = 0x%08x, TA %d -> %d\n", |
| 514 | tlli(), m_ta, ta_); |
| 515 | m_ta = ta_; |
| 516 | } else |
| 517 | LOGP(DRLCMAC, LOGL_NOTICE, |
| 518 | "MS object, TLLI = 0x%08x, invalid TA %d rejected (old " |
| 519 | "value %d kept)\n", tlli(), ta_, m_ta); |
Jacob Erlbeck | 9200ce6 | 2015-05-22 17:48:04 +0200 | [diff] [blame] | 520 | } |
| 521 | |
Jacob Erlbeck | befc760 | 2015-06-02 12:33:30 +0200 | [diff] [blame] | 522 | void GprsMs::set_ms_class(uint8_t ms_class_) |
| 523 | { |
| 524 | if (ms_class_ == m_ms_class) |
| 525 | return; |
| 526 | |
| 527 | LOGP(DRLCMAC, LOGL_INFO, |
| 528 | "Modifying MS object, TLLI = 0x%08x, MS class %d -> %d\n", |
| 529 | tlli(), m_ms_class, ms_class_); |
| 530 | |
| 531 | m_ms_class = ms_class_; |
| 532 | } |
| 533 | |
Jacob Erlbeck | c3c5804 | 2015-09-28 17:55:32 +0200 | [diff] [blame] | 534 | void GprsMs::set_egprs_ms_class(uint8_t ms_class_) |
| 535 | { |
| 536 | if (ms_class_ == m_egprs_ms_class) |
| 537 | return; |
| 538 | |
| 539 | LOGP(DRLCMAC, LOGL_INFO, |
| 540 | "Modifying MS object, TLLI = 0x%08x, EGPRS MS class %d -> %d\n", |
| 541 | tlli(), m_egprs_ms_class, ms_class_); |
| 542 | |
| 543 | m_egprs_ms_class = ms_class_; |
Pau Espin Pedrol | 8072e35 | 2020-10-30 18:18:06 +0100 | [diff] [blame] | 544 | |
Pau Espin Pedrol | 9897b26 | 2020-11-04 18:01:56 +0100 | [diff] [blame] | 545 | if (!m_bts->max_mcs_ul() || !m_bts->max_mcs_dl()) { |
| 546 | LOGPMS(this, DRLCMAC, LOGL_DEBUG, |
| 547 | "Avoid enabling EGPRS because use of MCS is disabled: ul=%u dl=%u\n", |
| 548 | m_bts->max_mcs_ul(), m_bts->max_mcs_dl()); |
| 549 | return; |
| 550 | } |
| 551 | |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 552 | if (mcs_is_edge_gmsk(mcs_get_egprs_by_num(m_bts->max_mcs_ul())) && |
| 553 | mcs_is_edge_gmsk(mcs_get_egprs_by_num(m_bts->max_mcs_dl())) && |
Pau Espin Pedrol | 8072e35 | 2020-10-30 18:18:06 +0100 | [diff] [blame] | 554 | mode() != EGPRS) |
| 555 | { |
| 556 | set_mode(EGPRS_GMSK); |
| 557 | } else { |
| 558 | set_mode(EGPRS); |
| 559 | } |
| 560 | LOGPMS(this, DRLCMAC, LOGL_INFO, "Enabled EGPRS, mode %s\n", mode_name(mode())); |
Jacob Erlbeck | c3c5804 | 2015-09-28 17:55:32 +0200 | [diff] [blame] | 561 | } |
| 562 | |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 563 | void GprsMs::update_error_rate(gprs_rlcmac_tbf *tbf, int error_rate) |
| 564 | { |
| 565 | struct gprs_rlcmac_bts *bts_data; |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 566 | int64_t now; |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 567 | enum CodingScheme max_cs_dl = this->max_cs_dl(); |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 568 | |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 569 | OSMO_ASSERT(max_cs_dl); |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 570 | bts_data = m_bts->bts_data(); |
| 571 | |
| 572 | if (error_rate < 0) |
| 573 | return; |
| 574 | |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 575 | now = now_msec(); |
| 576 | |
Jacob Erlbeck | 94cde13 | 2015-06-09 09:44:36 +0200 | [diff] [blame] | 577 | /* TODO: Check for TBF direction */ |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 578 | /* TODO: Support different CS values for UL and DL */ |
| 579 | |
Jacob Erlbeck | 04a1086 | 2015-06-12 16:01:56 +0200 | [diff] [blame] | 580 | m_nack_rate_dl = error_rate; |
| 581 | |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 582 | if (error_rate > bts_data->cs_adj_upper_limit) { |
Max | 898dddb | 2019-03-12 15:50:57 +0100 | [diff] [blame] | 583 | if (mcs_chan_code(m_current_cs_dl) > 0) { |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 584 | mcs_dec_kind(&m_current_cs_dl, mode()); |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 585 | LOGP(DRLCMACDL, LOGL_INFO, |
| 586 | "MS (IMSI %s): High error rate %d%%, " |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 587 | "reducing CS level to %s\n", |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 588 | imsi(), error_rate, mcs_name(m_current_cs_dl)); |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 589 | m_last_cs_not_low = now; |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 590 | } |
| 591 | } else if (error_rate < bts_data->cs_adj_lower_limit) { |
Jacob Erlbeck | b33e675 | 2015-06-04 19:04:30 +0200 | [diff] [blame] | 592 | if (m_current_cs_dl < max_cs_dl) { |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 593 | if (now - m_last_cs_not_low > 1000) { |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 594 | mcs_inc_kind(&m_current_cs_dl, mode()); |
Jacob Erlbeck | b33e675 | 2015-06-04 19:04:30 +0200 | [diff] [blame] | 595 | |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 596 | LOGP(DRLCMACDL, LOGL_INFO, |
| 597 | "MS (IMSI %s): Low error rate %d%%, " |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 598 | "increasing DL CS level to %s\n", |
| 599 | imsi(), error_rate, |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 600 | mcs_name(m_current_cs_dl)); |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 601 | m_last_cs_not_low = now; |
| 602 | } else { |
| 603 | LOGP(DRLCMACDL, LOGL_DEBUG, |
| 604 | "MS (IMSI %s): Low error rate %d%%, " |
| 605 | "ignored (within blocking period)\n", |
| 606 | imsi(), error_rate); |
| 607 | } |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 608 | } |
| 609 | } else { |
| 610 | LOGP(DRLCMACDL, LOGL_DEBUG, |
| 611 | "MS (IMSI %s): Medium error rate %d%%, ignored\n", |
| 612 | imsi(), error_rate); |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 613 | m_last_cs_not_low = now; |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 614 | } |
| 615 | } |
Jacob Erlbeck | e4bcb62 | 2015-06-08 11:26:38 +0200 | [diff] [blame] | 616 | |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 617 | enum CodingScheme GprsMs::max_cs_ul() const |
Jacob Erlbeck | e4bcb62 | 2015-06-08 11:26:38 +0200 | [diff] [blame] | 618 | { |
Jacob Erlbeck | 94cde13 | 2015-06-09 09:44:36 +0200 | [diff] [blame] | 619 | OSMO_ASSERT(m_bts != NULL); |
Jacob Erlbeck | 94cde13 | 2015-06-09 09:44:36 +0200 | [diff] [blame] | 620 | |
Max | 8a8e0fb | 2019-03-25 16:32:50 +0100 | [diff] [blame] | 621 | if (mcs_is_gprs(m_current_cs_ul)) { |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 622 | if (!m_bts->max_cs_ul()) { |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 623 | return CS4; |
| 624 | } |
Jacob Erlbeck | 94cde13 | 2015-06-09 09:44:36 +0200 | [diff] [blame] | 625 | |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 626 | return mcs_get_gprs_by_num(m_bts->max_cs_ul()); |
Jacob Erlbeck | 94cde13 | 2015-06-09 09:44:36 +0200 | [diff] [blame] | 627 | } |
| 628 | |
Max | 8a8e0fb | 2019-03-25 16:32:50 +0100 | [diff] [blame] | 629 | if (!mcs_is_edge(m_current_cs_ul)) |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 630 | return UNKNOWN; |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 631 | |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 632 | if (m_bts->max_mcs_ul()) |
| 633 | return mcs_get_egprs_by_num(m_bts->max_mcs_ul()); |
| 634 | else if (m_bts->max_cs_ul()) |
| 635 | return mcs_get_gprs_by_num(m_bts->max_cs_ul()); |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 636 | |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 637 | return MCS4; |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 638 | } |
| 639 | |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 640 | void GprsMs::set_current_cs_dl(enum CodingScheme scheme) |
Aravind Sirsikar | e8ccafc | 2016-07-13 11:37:47 +0530 | [diff] [blame] | 641 | { |
| 642 | m_current_cs_dl = scheme; |
| 643 | } |
| 644 | |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 645 | enum CodingScheme GprsMs::max_cs_dl() const |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 646 | { |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 647 | OSMO_ASSERT(m_bts != NULL); |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 648 | |
Max | 8a8e0fb | 2019-03-25 16:32:50 +0100 | [diff] [blame] | 649 | if (mcs_is_gprs(m_current_cs_dl)) { |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 650 | if (!m_bts->max_cs_dl()) { |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 651 | return CS4; |
| 652 | } |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 653 | |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 654 | return mcs_get_gprs_by_num(m_bts->max_cs_dl()); |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 655 | } |
| 656 | |
Max | 8a8e0fb | 2019-03-25 16:32:50 +0100 | [diff] [blame] | 657 | if (!mcs_is_edge(m_current_cs_dl)) |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 658 | return UNKNOWN; |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 659 | |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 660 | if (m_bts->max_mcs_dl()) |
| 661 | return mcs_get_egprs_by_num(m_bts->max_mcs_dl()); |
| 662 | else if (m_bts->max_cs_dl()) |
| 663 | return mcs_get_gprs_by_num(m_bts->max_cs_dl()); |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 664 | |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 665 | return MCS4; |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 666 | } |
| 667 | |
| 668 | void GprsMs::update_cs_ul(const pcu_l1_meas *meas) |
| 669 | { |
| 670 | struct gprs_rlcmac_bts *bts_data; |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 671 | enum CodingScheme max_cs_ul = this->max_cs_ul(); |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 672 | |
| 673 | int old_link_qual; |
| 674 | int low; |
| 675 | int high; |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 676 | enum CodingScheme new_cs_ul = m_current_cs_ul; |
Max | 898dddb | 2019-03-12 15:50:57 +0100 | [diff] [blame] | 677 | uint8_t current_cs = mcs_chan_code(m_current_cs_ul); |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 678 | |
| 679 | bts_data = m_bts->bts_data(); |
| 680 | |
| 681 | if (!max_cs_ul) { |
Minh-Quang Nguyen | 1f18909 | 2017-08-16 09:50:06 -0400 | [diff] [blame] | 682 | LOGP(DRLCMACMEAS, LOGL_ERROR, |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 683 | "max_cs_ul cannot be derived (current UL CS: %s)\n", |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 684 | mcs_name(m_current_cs_ul)); |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 685 | return; |
| 686 | } |
| 687 | |
Max | fa3085b | 2019-03-07 11:46:43 +0100 | [diff] [blame] | 688 | if (!m_current_cs_ul) { |
| 689 | LOGP(DRLCMACMEAS, LOGL_ERROR, |
| 690 | "Unable to update UL (M)CS because it's not set: %s\n", |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 691 | mcs_name(m_current_cs_ul)); |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 692 | return; |
Max | fa3085b | 2019-03-07 11:46:43 +0100 | [diff] [blame] | 693 | } |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 694 | |
Max | fa3085b | 2019-03-07 11:46:43 +0100 | [diff] [blame] | 695 | if (!meas->have_link_qual) { |
| 696 | LOGP(DRLCMACMEAS, LOGL_ERROR, |
| 697 | "Unable to update UL (M)CS %s because we don't have link quality measurements.\n", |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 698 | mcs_name(m_current_cs_ul)); |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 699 | return; |
Max | fa3085b | 2019-03-07 11:46:43 +0100 | [diff] [blame] | 700 | } |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 701 | |
Max | 8a8e0fb | 2019-03-25 16:32:50 +0100 | [diff] [blame] | 702 | if (mcs_is_gprs(m_current_cs_ul)) { |
Max | 898dddb | 2019-03-12 15:50:57 +0100 | [diff] [blame] | 703 | if (current_cs >= MAX_GPRS_CS) |
| 704 | current_cs = MAX_GPRS_CS - 1; |
| 705 | low = bts_data->cs_lqual_ranges[current_cs].low; |
| 706 | high = bts_data->cs_lqual_ranges[current_cs].high; |
Max | 8a8e0fb | 2019-03-25 16:32:50 +0100 | [diff] [blame] | 707 | } else if (mcs_is_edge(m_current_cs_ul)) { |
Max | 898dddb | 2019-03-12 15:50:57 +0100 | [diff] [blame] | 708 | if (current_cs >= MAX_EDGE_MCS) |
| 709 | current_cs = MAX_EDGE_MCS - 1; |
| 710 | low = bts_data->mcs_lqual_ranges[current_cs].low; |
| 711 | high = bts_data->mcs_lqual_ranges[current_cs].high; |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 712 | } else { |
Max | fa3085b | 2019-03-07 11:46:43 +0100 | [diff] [blame] | 713 | LOGP(DRLCMACMEAS, LOGL_ERROR, |
| 714 | "Unable to update UL (M)CS because it's neither GPRS nor EDGE: %s\n", |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 715 | mcs_name(m_current_cs_ul)); |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 716 | return; |
| 717 | } |
| 718 | |
Vadim Yanitskiy | fd734de | 2019-11-08 05:37:18 +0700 | [diff] [blame] | 719 | /* To avoid rapid changes of the coding scheme, we also take |
| 720 | * the old link quality value into account (if present). */ |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 721 | if (m_l1_meas.have_link_qual) |
| 722 | old_link_qual = m_l1_meas.link_qual; |
Vadim Yanitskiy | fd734de | 2019-11-08 05:37:18 +0700 | [diff] [blame] | 723 | else |
| 724 | old_link_qual = meas->link_qual; |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 725 | |
| 726 | if (meas->link_qual < low && old_link_qual < low) |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 727 | mcs_dec_kind(&new_cs_ul, mode()); |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 728 | else if (meas->link_qual > high && old_link_qual > high && |
| 729 | m_current_cs_ul < max_cs_ul) |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 730 | mcs_inc_kind(&new_cs_ul, mode()); |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 731 | |
| 732 | if (m_current_cs_ul != new_cs_ul) { |
Pau Espin Pedrol | f2dad59 | 2020-08-18 20:26:25 +0200 | [diff] [blame] | 733 | LOGPMS(this, DRLCMACMEAS, LOGL_INFO, |
| 734 | "Link quality %ddB (old %ddB) left window [%d, %d], " |
| 735 | "modifying uplink CS level: %s -> %s\n", |
| 736 | meas->link_qual, old_link_qual, |
| 737 | low, high, |
| 738 | mcs_name(m_current_cs_ul), mcs_name(new_cs_ul)); |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 739 | |
| 740 | m_current_cs_ul = new_cs_ul; |
| 741 | } |
| 742 | } |
| 743 | |
| 744 | void GprsMs::update_l1_meas(const pcu_l1_meas *meas) |
| 745 | { |
| 746 | unsigned i; |
| 747 | |
| 748 | update_cs_ul(meas); |
| 749 | |
Jacob Erlbeck | e4bcb62 | 2015-06-08 11:26:38 +0200 | [diff] [blame] | 750 | if (meas->have_rssi) |
| 751 | m_l1_meas.set_rssi(meas->rssi); |
| 752 | if (meas->have_bto) |
| 753 | m_l1_meas.set_bto(meas->bto); |
| 754 | if (meas->have_ber) |
| 755 | m_l1_meas.set_ber(meas->ber); |
| 756 | if (meas->have_link_qual) |
| 757 | m_l1_meas.set_link_qual(meas->link_qual); |
Jacob Erlbeck | 51b1151 | 2015-06-11 16:54:50 +0200 | [diff] [blame] | 758 | |
| 759 | if (meas->have_ms_rx_qual) |
| 760 | m_l1_meas.set_ms_rx_qual(meas->ms_rx_qual); |
| 761 | if (meas->have_ms_c_value) |
| 762 | m_l1_meas.set_ms_c_value(meas->ms_c_value); |
| 763 | if (meas->have_ms_sign_var) |
| 764 | m_l1_meas.set_ms_sign_var(meas->ms_sign_var); |
| 765 | |
| 766 | if (meas->have_ms_i_level) { |
| 767 | for (i = 0; i < ARRAY_SIZE(meas->ts); ++i) { |
| 768 | if (meas->ts[i].have_ms_i_level) |
| 769 | m_l1_meas.set_ms_i_level(i, meas->ts[i].ms_i_level); |
| 770 | else |
| 771 | m_l1_meas.ts[i].have_ms_i_level = 0; |
| 772 | } |
| 773 | } |
Jacob Erlbeck | e4bcb62 | 2015-06-08 11:26:38 +0200 | [diff] [blame] | 774 | } |
Jacob Erlbeck | 70b96aa | 2015-06-12 10:52:34 +0200 | [diff] [blame] | 775 | |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 776 | enum CodingScheme GprsMs::current_cs_dl() const |
Jacob Erlbeck | 70b96aa | 2015-06-12 10:52:34 +0200 | [diff] [blame] | 777 | { |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 778 | enum CodingScheme cs = m_current_cs_dl; |
Jacob Erlbeck | 70b96aa | 2015-06-12 10:52:34 +0200 | [diff] [blame] | 779 | size_t unencoded_octets; |
| 780 | |
| 781 | if (!m_bts) |
| 782 | return cs; |
| 783 | |
| 784 | unencoded_octets = m_llc_queue.octets(); |
| 785 | |
| 786 | /* If the DL TBF is active, add number of unencoded chunk octets */ |
| 787 | if (m_dl_tbf) |
Jacob Erlbeck | 14e26cb | 2016-02-03 15:26:29 +0100 | [diff] [blame] | 788 | unencoded_octets += m_dl_tbf->m_llc.chunk_size(); |
Jacob Erlbeck | 70b96aa | 2015-06-12 10:52:34 +0200 | [diff] [blame] | 789 | |
| 790 | /* There are many unencoded octets, don't reduce */ |
| 791 | if (unencoded_octets >= m_bts->bts_data()->cs_downgrade_threshold) |
| 792 | return cs; |
| 793 | |
| 794 | /* RF conditions are good, don't reduce */ |
| 795 | if (m_nack_rate_dl < m_bts->bts_data()->cs_adj_lower_limit) |
| 796 | return cs; |
| 797 | |
| 798 | /* The throughput would probably be better if the CS level was reduced */ |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 799 | mcs_dec_kind(&cs, mode()); |
Jacob Erlbeck | 70b96aa | 2015-06-12 10:52:34 +0200 | [diff] [blame] | 800 | |
| 801 | /* CS-2 doesn't gain throughput with small packets, further reduce to CS-1 */ |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 802 | if (cs == CS2) |
| 803 | mcs_dec_kind(&cs, mode()); |
Jacob Erlbeck | 70b96aa | 2015-06-12 10:52:34 +0200 | [diff] [blame] | 804 | |
| 805 | return cs; |
| 806 | } |
| 807 | |
Jacob Erlbeck | 699b8dc | 2015-06-29 14:05:55 +0200 | [diff] [blame] | 808 | int GprsMs::first_common_ts() const |
| 809 | { |
| 810 | if (m_dl_tbf) |
| 811 | return m_dl_tbf->first_common_ts; |
| 812 | |
| 813 | if (m_ul_tbf) |
| 814 | return m_ul_tbf->first_common_ts; |
| 815 | |
| 816 | return -1; |
| 817 | } |
| 818 | |
Jacob Erlbeck | 617c712 | 2015-06-30 09:18:30 +0200 | [diff] [blame] | 819 | uint8_t GprsMs::dl_slots() const |
| 820 | { |
| 821 | uint8_t slots = 0; |
| 822 | |
| 823 | if (m_dl_tbf) |
| 824 | slots |= m_dl_tbf->dl_slots(); |
| 825 | |
| 826 | if (m_ul_tbf) |
| 827 | slots |= m_ul_tbf->dl_slots(); |
| 828 | |
| 829 | return slots; |
| 830 | } |
| 831 | |
| 832 | uint8_t GprsMs::ul_slots() const |
| 833 | { |
| 834 | uint8_t slots = 0; |
| 835 | |
| 836 | if (m_dl_tbf) |
| 837 | slots |= m_dl_tbf->ul_slots(); |
| 838 | |
| 839 | if (m_ul_tbf) |
| 840 | slots |= m_ul_tbf->ul_slots(); |
| 841 | |
| 842 | return slots; |
| 843 | } |
| 844 | |
Jacob Erlbeck | 7c72aca | 2016-01-22 17:06:14 +0100 | [diff] [blame] | 845 | uint8_t GprsMs::current_pacch_slots() const |
| 846 | { |
| 847 | uint8_t slots = 0; |
| 848 | |
| 849 | bool is_dl_active = m_dl_tbf && m_dl_tbf->is_tfi_assigned(); |
| 850 | bool is_ul_active = m_ul_tbf && m_ul_tbf->is_tfi_assigned(); |
| 851 | |
| 852 | if (!is_dl_active && !is_ul_active) |
| 853 | return 0; |
| 854 | |
| 855 | /* see TS 44.060, 8.1.1.2.2 */ |
| 856 | if (is_dl_active && !is_ul_active) |
| 857 | slots = m_dl_tbf->dl_slots(); |
| 858 | else if (!is_dl_active && is_ul_active) |
| 859 | slots = m_ul_tbf->ul_slots(); |
| 860 | else |
| 861 | slots = m_ul_tbf->ul_slots() & m_dl_tbf->dl_slots(); |
| 862 | |
| 863 | /* Assume a multislot class 1 device */ |
| 864 | /* TODO: For class 2 devices, this could be removed */ |
| 865 | slots = pcu_lsb(slots); |
| 866 | |
| 867 | return slots; |
| 868 | } |
| 869 | |
Jacob Erlbeck | 23f93a1 | 2015-06-30 08:52:54 +0200 | [diff] [blame] | 870 | void GprsMs::set_reserved_slots(gprs_rlcmac_trx *trx, |
| 871 | uint8_t ul_slots, uint8_t dl_slots) |
| 872 | { |
| 873 | if (m_current_trx) { |
| 874 | m_current_trx->unreserve_slots(GPRS_RLCMAC_DL_TBF, |
| 875 | m_reserved_dl_slots); |
| 876 | m_current_trx->unreserve_slots(GPRS_RLCMAC_UL_TBF, |
| 877 | m_reserved_ul_slots); |
| 878 | m_reserved_dl_slots = 0; |
| 879 | m_reserved_ul_slots = 0; |
| 880 | } |
| 881 | m_current_trx = trx; |
| 882 | if (trx) { |
| 883 | m_reserved_dl_slots = dl_slots; |
| 884 | m_reserved_ul_slots = ul_slots; |
| 885 | m_current_trx->reserve_slots(GPRS_RLCMAC_DL_TBF, |
| 886 | m_reserved_dl_slots); |
| 887 | m_current_trx->reserve_slots(GPRS_RLCMAC_UL_TBF, |
| 888 | m_reserved_ul_slots); |
| 889 | } |
| 890 | } |
| 891 | |
Jacob Erlbeck | ac89a55 | 2015-06-29 14:18:46 +0200 | [diff] [blame] | 892 | gprs_rlcmac_tbf *GprsMs::tbf(enum gprs_rlcmac_tbf_direction dir) const |
| 893 | { |
| 894 | switch (dir) { |
| 895 | case GPRS_RLCMAC_DL_TBF: return m_dl_tbf; |
| 896 | case GPRS_RLCMAC_UL_TBF: return m_ul_tbf; |
| 897 | } |
| 898 | |
| 899 | return NULL; |
| 900 | } |