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