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" |
| 23 | |
Jacob Erlbeck | a700dd9 | 2015-06-02 16:00:41 +0200 | [diff] [blame] | 24 | #include "bts.h" |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 25 | #include "tbf.h" |
| 26 | #include "gprs_debug.h" |
| 27 | |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 28 | #include <time.h> |
| 29 | |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 30 | extern "C" { |
| 31 | #include <osmocom/core/talloc.h> |
| 32 | #include <osmocom/core/utils.h> |
| 33 | } |
| 34 | |
| 35 | extern void *tall_pcu_ctx; |
| 36 | |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 37 | static int64_t now_msec() |
| 38 | { |
| 39 | struct timespec ts; |
| 40 | clock_gettime(CLOCK_MONOTONIC, &ts); |
| 41 | |
| 42 | return int64_t(ts.tv_sec) * 1000 + ts.tv_nsec / 1000000; |
| 43 | } |
| 44 | |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 45 | struct GprsMsDefaultCallback: public GprsMs::Callback { |
| 46 | virtual void ms_idle(class GprsMs *ms) { |
| 47 | delete ms; |
| 48 | } |
| 49 | virtual void ms_active(class GprsMs *) {} |
| 50 | }; |
| 51 | |
| 52 | static GprsMsDefaultCallback gprs_default_cb; |
| 53 | |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 54 | GprsMs::Guard::Guard(GprsMs *ms) : |
| 55 | m_ms(ms ? ms->ref() : NULL) |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 56 | { |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 57 | } |
| 58 | |
| 59 | GprsMs::Guard::~Guard() |
| 60 | { |
| 61 | if (m_ms) |
| 62 | m_ms->unref(); |
| 63 | } |
| 64 | |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 65 | void GprsMs::timeout(void *priv_) |
| 66 | { |
| 67 | GprsMs *ms = static_cast<GprsMs *>(priv_); |
| 68 | |
| 69 | LOGP(DRLCMAC, LOGL_INFO, "Timeout for MS object, TLLI = 0x%08x\n", |
| 70 | ms->tlli()); |
| 71 | |
| 72 | if (ms->m_timer.data) { |
| 73 | ms->m_timer.data = NULL; |
| 74 | ms->unref(); |
| 75 | } |
| 76 | } |
| 77 | |
Jacob Erlbeck | 17214bb | 2015-06-02 14:06:12 +0200 | [diff] [blame] | 78 | GprsMs::GprsMs(BTS *bts, uint32_t tlli) : |
| 79 | m_bts(bts), |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 80 | m_cb(&gprs_default_cb), |
| 81 | m_ul_tbf(NULL), |
| 82 | m_dl_tbf(NULL), |
| 83 | m_tlli(tlli), |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 84 | m_new_ul_tlli(0), |
| 85 | m_new_dl_tlli(0), |
Jacob Erlbeck | 9200ce6 | 2015-05-22 17:48:04 +0200 | [diff] [blame] | 86 | m_ta(0), |
Jacob Erlbeck | befc760 | 2015-06-02 12:33:30 +0200 | [diff] [blame] | 87 | m_ms_class(0), |
Jacob Erlbeck | a700dd9 | 2015-06-02 16:00:41 +0200 | [diff] [blame] | 88 | m_current_cs_ul(1), |
| 89 | m_current_cs_dl(1), |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 90 | m_is_idle(true), |
Jacob Erlbeck | 5367086 | 2015-05-12 17:54:33 +0200 | [diff] [blame] | 91 | m_ref(0), |
Jacob Erlbeck | 25db7c6 | 2015-06-11 12:59:01 +0200 | [diff] [blame] | 92 | m_list(this), |
Jacob Erlbeck | 04a1086 | 2015-06-12 16:01:56 +0200 | [diff] [blame] | 93 | m_delay(0), |
Jacob Erlbeck | 23f93a1 | 2015-06-30 08:52:54 +0200 | [diff] [blame] | 94 | m_nack_rate_dl(0), |
| 95 | m_reserved_dl_slots(0), |
| 96 | m_reserved_ul_slots(0), |
| 97 | m_current_trx(NULL) |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 98 | { |
| 99 | LOGP(DRLCMAC, LOGL_INFO, "Creating MS object, TLLI = 0x%08x\n", tlli); |
Jacob Erlbeck | b0e5eaf | 2015-05-21 11:07:16 +0200 | [diff] [blame] | 100 | |
| 101 | m_imsi[0] = 0; |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 102 | memset(&m_timer, 0, sizeof(m_timer)); |
| 103 | m_timer.cb = GprsMs::timeout; |
Jacob Erlbeck | 489a2b3 | 2015-05-28 19:07:01 +0200 | [diff] [blame] | 104 | m_llc_queue.init(); |
Jacob Erlbeck | a700dd9 | 2015-06-02 16:00:41 +0200 | [diff] [blame] | 105 | if (m_bts) { |
| 106 | m_current_cs_ul = m_bts->bts_data()->initial_cs_ul; |
| 107 | if (m_current_cs_ul < 1) |
| 108 | m_current_cs_ul = 1; |
| 109 | |
| 110 | m_current_cs_dl = m_bts->bts_data()->initial_cs_dl; |
| 111 | if (m_current_cs_dl < 1) |
| 112 | m_current_cs_dl = 1; |
| 113 | } |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 114 | m_last_cs_not_low = now_msec(); |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 115 | } |
| 116 | |
| 117 | GprsMs::~GprsMs() |
| 118 | { |
| 119 | LOGP(DRLCMAC, LOGL_INFO, "Destroying MS object, TLLI = 0x%08x\n", tlli()); |
Jacob Erlbeck | fecece0 | 2015-05-08 12:13:08 +0200 | [diff] [blame] | 120 | |
Jacob Erlbeck | 23f93a1 | 2015-06-30 08:52:54 +0200 | [diff] [blame] | 121 | set_reserved_slots(NULL, 0, 0); |
| 122 | |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 123 | if (osmo_timer_pending(&m_timer)) |
| 124 | osmo_timer_del(&m_timer); |
| 125 | |
Jacob Erlbeck | fecece0 | 2015-05-08 12:13:08 +0200 | [diff] [blame] | 126 | if (m_ul_tbf) { |
| 127 | m_ul_tbf->set_ms(NULL); |
| 128 | m_ul_tbf = NULL; |
| 129 | } |
| 130 | |
| 131 | if (m_dl_tbf) { |
| 132 | m_dl_tbf->set_ms(NULL); |
| 133 | m_dl_tbf = NULL; |
| 134 | } |
Jacob Erlbeck | 17214bb | 2015-06-02 14:06:12 +0200 | [diff] [blame] | 135 | m_llc_queue.clear(m_bts); |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 136 | } |
| 137 | |
| 138 | void* GprsMs::operator new(size_t size) |
| 139 | { |
| 140 | static void *tall_ms_ctx = NULL; |
| 141 | if (!tall_ms_ctx) |
| 142 | tall_ms_ctx = talloc_named_const(tall_pcu_ctx, 0, __PRETTY_FUNCTION__); |
| 143 | |
| 144 | return talloc_size(tall_ms_ctx, size); |
| 145 | } |
| 146 | |
| 147 | void GprsMs::operator delete(void* p) |
| 148 | { |
| 149 | talloc_free(p); |
| 150 | } |
| 151 | |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 152 | GprsMs *GprsMs::ref() |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 153 | { |
| 154 | m_ref += 1; |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 155 | return this; |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 156 | } |
| 157 | |
| 158 | void GprsMs::unref() |
| 159 | { |
| 160 | OSMO_ASSERT(m_ref >= 0); |
| 161 | m_ref -= 1; |
| 162 | if (m_ref == 0) |
| 163 | update_status(); |
| 164 | } |
| 165 | |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 166 | void GprsMs::start_timer() |
| 167 | { |
| 168 | if (m_delay == 0) |
| 169 | return; |
| 170 | |
| 171 | if (!m_timer.data) |
| 172 | m_timer.data = ref(); |
| 173 | |
| 174 | osmo_timer_schedule(&m_timer, m_delay, 0); |
| 175 | } |
| 176 | |
| 177 | void GprsMs::stop_timer() |
| 178 | { |
| 179 | if (!m_timer.data) |
| 180 | return; |
| 181 | |
| 182 | osmo_timer_del(&m_timer); |
| 183 | m_timer.data = NULL; |
| 184 | unref(); |
| 185 | } |
| 186 | |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 187 | void GprsMs::attach_tbf(struct gprs_rlcmac_tbf *tbf) |
| 188 | { |
| 189 | if (tbf->direction == GPRS_RLCMAC_DL_TBF) |
| 190 | attach_dl_tbf(static_cast<gprs_rlcmac_dl_tbf *>(tbf)); |
| 191 | else |
| 192 | attach_ul_tbf(static_cast<gprs_rlcmac_ul_tbf *>(tbf)); |
| 193 | } |
| 194 | |
| 195 | void GprsMs::attach_ul_tbf(struct gprs_rlcmac_ul_tbf *tbf) |
| 196 | { |
| 197 | if (m_ul_tbf == tbf) |
| 198 | return; |
| 199 | |
| 200 | LOGP(DRLCMAC, LOGL_INFO, "Attaching TBF to MS object, TLLI = 0x%08x, TBF = %s\n", |
| 201 | tlli(), tbf->name()); |
| 202 | |
| 203 | Guard guard(this); |
| 204 | |
| 205 | if (m_ul_tbf) |
| 206 | detach_tbf(m_ul_tbf); |
| 207 | |
| 208 | m_ul_tbf = tbf; |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 209 | |
| 210 | if (tbf) |
| 211 | stop_timer(); |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 212 | } |
| 213 | |
| 214 | void GprsMs::attach_dl_tbf(struct gprs_rlcmac_dl_tbf *tbf) |
| 215 | { |
| 216 | if (m_dl_tbf == tbf) |
| 217 | return; |
| 218 | |
| 219 | LOGP(DRLCMAC, LOGL_INFO, "Attaching TBF to MS object, TLLI = 0x%08x, TBF = %s\n", |
| 220 | tlli(), tbf->name()); |
| 221 | |
| 222 | Guard guard(this); |
| 223 | |
| 224 | if (m_dl_tbf) |
| 225 | detach_tbf(m_dl_tbf); |
| 226 | |
| 227 | m_dl_tbf = tbf; |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 228 | |
| 229 | if (tbf) |
| 230 | stop_timer(); |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 231 | } |
| 232 | |
| 233 | void GprsMs::detach_tbf(gprs_rlcmac_tbf *tbf) |
| 234 | { |
| 235 | if (m_ul_tbf && tbf == static_cast<gprs_rlcmac_tbf *>(m_ul_tbf)) |
| 236 | m_ul_tbf = NULL; |
| 237 | else if (m_dl_tbf && tbf == static_cast<gprs_rlcmac_tbf *>(m_dl_tbf)) |
| 238 | m_dl_tbf = NULL; |
| 239 | else |
| 240 | return; |
| 241 | |
| 242 | LOGP(DRLCMAC, LOGL_INFO, "Detaching TBF from MS object, TLLI = 0x%08x, TBF = %s\n", |
| 243 | tlli(), tbf->name()); |
| 244 | |
Jacob Erlbeck | fecece0 | 2015-05-08 12:13:08 +0200 | [diff] [blame] | 245 | if (tbf->ms() == this) |
| 246 | tbf->set_ms(NULL); |
| 247 | |
Jacob Erlbeck | 23f93a1 | 2015-06-30 08:52:54 +0200 | [diff] [blame] | 248 | if (!m_dl_tbf && !m_ul_tbf) { |
| 249 | set_reserved_slots(NULL, 0, 0); |
| 250 | |
| 251 | if (tlli() != 0) |
| 252 | start_timer(); |
| 253 | } |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 254 | |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 255 | update_status(); |
| 256 | } |
| 257 | |
| 258 | void GprsMs::update_status() |
| 259 | { |
| 260 | if (m_ref > 0) |
| 261 | return; |
| 262 | |
| 263 | if (is_idle() && !m_is_idle) { |
| 264 | m_is_idle = true; |
| 265 | m_cb->ms_idle(this); |
| 266 | /* this can be deleted by now, do not access it */ |
| 267 | return; |
| 268 | } |
| 269 | |
| 270 | if (!is_idle() && m_is_idle) { |
| 271 | m_is_idle = false; |
| 272 | m_cb->ms_active(this); |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | void GprsMs::set_tlli(uint32_t tlli) |
| 277 | { |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 278 | if (tlli == m_tlli || tlli == m_new_ul_tlli) |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 279 | return; |
| 280 | |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 281 | if (tlli != m_new_dl_tlli) { |
| 282 | LOGP(DRLCMAC, LOGL_INFO, |
| 283 | "Modifying MS object, UL TLLI: 0x%08x -> 0x%08x, " |
| 284 | "not yet confirmed\n", |
| 285 | this->tlli(), tlli); |
| 286 | m_new_ul_tlli = tlli; |
| 287 | return; |
| 288 | } |
| 289 | |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 290 | LOGP(DRLCMAC, LOGL_INFO, |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 291 | "Modifying MS object, TLLI: 0x%08x -> 0x%08x, " |
| 292 | "already confirmed partly\n", |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 293 | m_tlli, tlli); |
| 294 | |
| 295 | m_tlli = tlli; |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 296 | m_new_dl_tlli = 0; |
| 297 | m_new_ul_tlli = 0; |
| 298 | } |
| 299 | |
| 300 | bool GprsMs::confirm_tlli(uint32_t tlli) |
| 301 | { |
| 302 | if (tlli == m_tlli || tlli == m_new_dl_tlli) |
| 303 | return false; |
| 304 | |
| 305 | if (tlli != m_new_ul_tlli) { |
| 306 | /* The MS has not sent a message with the new TLLI, which may |
| 307 | * happen according to the spec [TODO: add reference]. */ |
| 308 | |
| 309 | LOGP(DRLCMAC, LOGL_INFO, |
| 310 | "The MS object cannot fully confirm an unexpected TLLI: 0x%08x, " |
| 311 | "partly confirmed\n", tlli); |
| 312 | /* Use the network's idea of TLLI as candidate, this does not |
| 313 | * change the result value of tlli() */ |
| 314 | m_new_dl_tlli = tlli; |
| 315 | return false; |
| 316 | } |
| 317 | |
| 318 | LOGP(DRLCMAC, LOGL_INFO, |
| 319 | "Modifying MS object, TLLI: 0x%08x confirmed\n", tlli); |
| 320 | |
| 321 | m_tlli = tlli; |
| 322 | m_new_dl_tlli = 0; |
| 323 | m_new_ul_tlli = 0; |
| 324 | |
| 325 | return true; |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 326 | } |
Jacob Erlbeck | b0e5eaf | 2015-05-21 11:07:16 +0200 | [diff] [blame] | 327 | |
| 328 | void GprsMs::set_imsi(const char *imsi) |
| 329 | { |
| 330 | if (!imsi) { |
| 331 | LOGP(DRLCMAC, LOGL_ERROR, "Expected IMSI!\n"); |
| 332 | return; |
| 333 | } |
| 334 | |
| 335 | if (imsi[0] && strlen(imsi) < 3) { |
| 336 | LOGP(DRLCMAC, LOGL_ERROR, "No valid IMSI '%s'!\n", |
| 337 | imsi); |
| 338 | return; |
| 339 | } |
| 340 | |
| 341 | if (strcmp(imsi, m_imsi) == 0) |
| 342 | return; |
| 343 | |
| 344 | LOGP(DRLCMAC, LOGL_INFO, |
| 345 | "Modifying MS object, TLLI = 0x%08x, IMSI '%s' -> '%s'\n", |
| 346 | tlli(), m_imsi, imsi); |
| 347 | |
| 348 | strncpy(m_imsi, imsi, sizeof(m_imsi)); |
| 349 | m_imsi[sizeof(m_imsi) - 1] = '\0'; |
| 350 | } |
| 351 | |
Jacob Erlbeck | 9200ce6 | 2015-05-22 17:48:04 +0200 | [diff] [blame] | 352 | void GprsMs::set_ta(uint8_t ta_) |
| 353 | { |
| 354 | if (ta_ == m_ta) |
| 355 | return; |
| 356 | |
| 357 | LOGP(DRLCMAC, LOGL_INFO, |
| 358 | "Modifying MS object, TLLI = 0x%08x, TA %d -> %d\n", |
| 359 | tlli(), m_ta, ta_); |
| 360 | |
| 361 | m_ta = ta_; |
| 362 | } |
| 363 | |
Jacob Erlbeck | befc760 | 2015-06-02 12:33:30 +0200 | [diff] [blame] | 364 | void GprsMs::set_ms_class(uint8_t ms_class_) |
| 365 | { |
| 366 | if (ms_class_ == m_ms_class) |
| 367 | return; |
| 368 | |
| 369 | LOGP(DRLCMAC, LOGL_INFO, |
| 370 | "Modifying MS object, TLLI = 0x%08x, MS class %d -> %d\n", |
| 371 | tlli(), m_ms_class, ms_class_); |
| 372 | |
| 373 | m_ms_class = ms_class_; |
| 374 | } |
| 375 | |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 376 | void GprsMs::update_error_rate(gprs_rlcmac_tbf *tbf, int error_rate) |
| 377 | { |
| 378 | struct gprs_rlcmac_bts *bts_data; |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 379 | int64_t now; |
Jacob Erlbeck | 94cde13 | 2015-06-09 09:44:36 +0200 | [diff] [blame] | 380 | uint8_t max_cs_dl = 4; |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 381 | |
| 382 | OSMO_ASSERT(m_bts != NULL); |
| 383 | bts_data = m_bts->bts_data(); |
| 384 | |
| 385 | if (error_rate < 0) |
| 386 | return; |
| 387 | |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 388 | now = now_msec(); |
| 389 | |
Jacob Erlbeck | b33e675 | 2015-06-04 19:04:30 +0200 | [diff] [blame] | 390 | if (bts_data->max_cs_dl) |
| 391 | max_cs_dl = bts_data->max_cs_dl; |
| 392 | |
Jacob Erlbeck | 94cde13 | 2015-06-09 09:44:36 +0200 | [diff] [blame] | 393 | /* TODO: Check for TBF direction */ |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 394 | /* TODO: Support different CS values for UL and DL */ |
| 395 | |
Jacob Erlbeck | 04a1086 | 2015-06-12 16:01:56 +0200 | [diff] [blame] | 396 | m_nack_rate_dl = error_rate; |
| 397 | |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 398 | if (error_rate > bts_data->cs_adj_upper_limit) { |
| 399 | if (m_current_cs_dl > 1) { |
| 400 | m_current_cs_dl -= 1; |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 401 | LOGP(DRLCMACDL, LOGL_INFO, |
| 402 | "MS (IMSI %s): High error rate %d%%, " |
| 403 | "reducing CS level to %d\n", |
| 404 | imsi(), error_rate, m_current_cs_dl); |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 405 | m_last_cs_not_low = now; |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 406 | } |
| 407 | } else if (error_rate < bts_data->cs_adj_lower_limit) { |
Jacob Erlbeck | b33e675 | 2015-06-04 19:04:30 +0200 | [diff] [blame] | 408 | if (m_current_cs_dl < max_cs_dl) { |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 409 | if (now - m_last_cs_not_low > 1000) { |
| 410 | m_current_cs_dl += 1; |
Jacob Erlbeck | b33e675 | 2015-06-04 19:04:30 +0200 | [diff] [blame] | 411 | |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 412 | LOGP(DRLCMACDL, LOGL_INFO, |
| 413 | "MS (IMSI %s): Low error rate %d%%, " |
Jacob Erlbeck | 94cde13 | 2015-06-09 09:44:36 +0200 | [diff] [blame] | 414 | "increasing DL CS level to %d\n", |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 415 | imsi(), error_rate, m_current_cs_dl); |
| 416 | m_last_cs_not_low = now; |
| 417 | } else { |
| 418 | LOGP(DRLCMACDL, LOGL_DEBUG, |
| 419 | "MS (IMSI %s): Low error rate %d%%, " |
| 420 | "ignored (within blocking period)\n", |
| 421 | imsi(), error_rate); |
| 422 | } |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 423 | } |
| 424 | } else { |
| 425 | LOGP(DRLCMACDL, LOGL_DEBUG, |
| 426 | "MS (IMSI %s): Medium error rate %d%%, ignored\n", |
| 427 | imsi(), error_rate); |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 428 | m_last_cs_not_low = now; |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 429 | } |
| 430 | } |
Jacob Erlbeck | e4bcb62 | 2015-06-08 11:26:38 +0200 | [diff] [blame] | 431 | |
| 432 | void GprsMs::update_l1_meas(const pcu_l1_meas *meas) |
| 433 | { |
Jacob Erlbeck | 94cde13 | 2015-06-09 09:44:36 +0200 | [diff] [blame] | 434 | struct gprs_rlcmac_bts *bts_data; |
| 435 | uint8_t max_cs_ul = 4; |
Jacob Erlbeck | 51b1151 | 2015-06-11 16:54:50 +0200 | [diff] [blame] | 436 | unsigned i; |
Jacob Erlbeck | 94cde13 | 2015-06-09 09:44:36 +0200 | [diff] [blame] | 437 | |
| 438 | OSMO_ASSERT(m_bts != NULL); |
| 439 | bts_data = m_bts->bts_data(); |
| 440 | |
| 441 | if (bts_data->max_cs_ul) |
| 442 | max_cs_ul = bts_data->max_cs_ul; |
| 443 | |
| 444 | if (meas->have_link_qual) { |
| 445 | int old_link_qual = meas->link_qual; |
| 446 | int low = bts_data->cs_lqual_ranges[current_cs_ul()-1].low; |
| 447 | int high = bts_data->cs_lqual_ranges[current_cs_ul()-1].high; |
| 448 | uint8_t new_cs_ul = m_current_cs_ul; |
| 449 | |
| 450 | if (m_l1_meas.have_link_qual) |
| 451 | old_link_qual = m_l1_meas.link_qual; |
| 452 | |
| 453 | if (meas->link_qual < low && old_link_qual < low) |
| 454 | new_cs_ul = m_current_cs_ul - 1; |
| 455 | else if (meas->link_qual > high && old_link_qual > high && |
| 456 | m_current_cs_ul < max_cs_ul) |
| 457 | new_cs_ul = m_current_cs_ul + 1; |
| 458 | |
| 459 | if (m_current_cs_ul != new_cs_ul) { |
| 460 | LOGP(DRLCMACDL, LOGL_INFO, |
| 461 | "MS (IMSI %s): " |
| 462 | "Link quality %ddB (%ddB) left window [%d, %d], " |
| 463 | "modifying uplink CS level: %d -> %d\n", |
| 464 | imsi(), meas->link_qual, old_link_qual, |
| 465 | low, high, |
| 466 | m_current_cs_ul, new_cs_ul); |
| 467 | |
| 468 | m_current_cs_ul = new_cs_ul; |
| 469 | } |
| 470 | } |
| 471 | |
Jacob Erlbeck | e4bcb62 | 2015-06-08 11:26:38 +0200 | [diff] [blame] | 472 | if (meas->have_rssi) |
| 473 | m_l1_meas.set_rssi(meas->rssi); |
| 474 | if (meas->have_bto) |
| 475 | m_l1_meas.set_bto(meas->bto); |
| 476 | if (meas->have_ber) |
| 477 | m_l1_meas.set_ber(meas->ber); |
| 478 | if (meas->have_link_qual) |
| 479 | m_l1_meas.set_link_qual(meas->link_qual); |
Jacob Erlbeck | 51b1151 | 2015-06-11 16:54:50 +0200 | [diff] [blame] | 480 | |
| 481 | if (meas->have_ms_rx_qual) |
| 482 | m_l1_meas.set_ms_rx_qual(meas->ms_rx_qual); |
| 483 | if (meas->have_ms_c_value) |
| 484 | m_l1_meas.set_ms_c_value(meas->ms_c_value); |
| 485 | if (meas->have_ms_sign_var) |
| 486 | m_l1_meas.set_ms_sign_var(meas->ms_sign_var); |
| 487 | |
| 488 | if (meas->have_ms_i_level) { |
| 489 | for (i = 0; i < ARRAY_SIZE(meas->ts); ++i) { |
| 490 | if (meas->ts[i].have_ms_i_level) |
| 491 | m_l1_meas.set_ms_i_level(i, meas->ts[i].ms_i_level); |
| 492 | else |
| 493 | m_l1_meas.ts[i].have_ms_i_level = 0; |
| 494 | } |
| 495 | } |
Jacob Erlbeck | e4bcb62 | 2015-06-08 11:26:38 +0200 | [diff] [blame] | 496 | } |
Jacob Erlbeck | 70b96aa | 2015-06-12 10:52:34 +0200 | [diff] [blame] | 497 | |
| 498 | uint8_t GprsMs::current_cs_dl() const |
| 499 | { |
| 500 | uint8_t cs = m_current_cs_dl; |
| 501 | size_t unencoded_octets; |
| 502 | |
| 503 | if (!m_bts) |
| 504 | return cs; |
| 505 | |
| 506 | unencoded_octets = m_llc_queue.octets(); |
| 507 | |
| 508 | /* If the DL TBF is active, add number of unencoded chunk octets */ |
| 509 | if (m_dl_tbf) |
| 510 | unencoded_octets = m_dl_tbf->m_llc.chunk_size(); |
| 511 | |
| 512 | /* There are many unencoded octets, don't reduce */ |
| 513 | if (unencoded_octets >= m_bts->bts_data()->cs_downgrade_threshold) |
| 514 | return cs; |
| 515 | |
| 516 | /* RF conditions are good, don't reduce */ |
| 517 | if (m_nack_rate_dl < m_bts->bts_data()->cs_adj_lower_limit) |
| 518 | return cs; |
| 519 | |
| 520 | /* The throughput would probably be better if the CS level was reduced */ |
| 521 | cs -= 1; |
| 522 | |
| 523 | /* CS-2 doesn't gain throughput with small packets, further reduce to CS-1 */ |
| 524 | if (cs == 2) |
| 525 | cs -= 1; |
| 526 | |
| 527 | return cs; |
| 528 | } |
| 529 | |
Jacob Erlbeck | 699b8dc | 2015-06-29 14:05:55 +0200 | [diff] [blame] | 530 | int GprsMs::first_common_ts() const |
| 531 | { |
| 532 | if (m_dl_tbf) |
| 533 | return m_dl_tbf->first_common_ts; |
| 534 | |
| 535 | if (m_ul_tbf) |
| 536 | return m_ul_tbf->first_common_ts; |
| 537 | |
| 538 | return -1; |
| 539 | } |
| 540 | |
Jacob Erlbeck | 617c712 | 2015-06-30 09:18:30 +0200 | [diff] [blame] | 541 | uint8_t GprsMs::dl_slots() const |
| 542 | { |
| 543 | uint8_t slots = 0; |
| 544 | |
| 545 | if (m_dl_tbf) |
| 546 | slots |= m_dl_tbf->dl_slots(); |
| 547 | |
| 548 | if (m_ul_tbf) |
| 549 | slots |= m_ul_tbf->dl_slots(); |
| 550 | |
| 551 | return slots; |
| 552 | } |
| 553 | |
| 554 | uint8_t GprsMs::ul_slots() const |
| 555 | { |
| 556 | uint8_t slots = 0; |
| 557 | |
| 558 | if (m_dl_tbf) |
| 559 | slots |= m_dl_tbf->ul_slots(); |
| 560 | |
| 561 | if (m_ul_tbf) |
| 562 | slots |= m_ul_tbf->ul_slots(); |
| 563 | |
| 564 | return slots; |
| 565 | } |
| 566 | |
Jacob Erlbeck | 23f93a1 | 2015-06-30 08:52:54 +0200 | [diff] [blame] | 567 | void GprsMs::set_reserved_slots(gprs_rlcmac_trx *trx, |
| 568 | uint8_t ul_slots, uint8_t dl_slots) |
| 569 | { |
| 570 | if (m_current_trx) { |
| 571 | m_current_trx->unreserve_slots(GPRS_RLCMAC_DL_TBF, |
| 572 | m_reserved_dl_slots); |
| 573 | m_current_trx->unreserve_slots(GPRS_RLCMAC_UL_TBF, |
| 574 | m_reserved_ul_slots); |
| 575 | m_reserved_dl_slots = 0; |
| 576 | m_reserved_ul_slots = 0; |
| 577 | } |
| 578 | m_current_trx = trx; |
| 579 | if (trx) { |
| 580 | m_reserved_dl_slots = dl_slots; |
| 581 | m_reserved_ul_slots = ul_slots; |
| 582 | m_current_trx->reserve_slots(GPRS_RLCMAC_DL_TBF, |
| 583 | m_reserved_dl_slots); |
| 584 | m_current_trx->reserve_slots(GPRS_RLCMAC_UL_TBF, |
| 585 | m_reserved_ul_slots); |
| 586 | } |
| 587 | } |
| 588 | |
Jacob Erlbeck | ac89a55 | 2015-06-29 14:18:46 +0200 | [diff] [blame] | 589 | gprs_rlcmac_tbf *GprsMs::tbf(enum gprs_rlcmac_tbf_direction dir) const |
| 590 | { |
| 591 | switch (dir) { |
| 592 | case GPRS_RLCMAC_DL_TBF: return m_dl_tbf; |
| 593 | case GPRS_RLCMAC_UL_TBF: return m_ul_tbf; |
| 594 | } |
| 595 | |
| 596 | return NULL; |
| 597 | } |