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" |
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> |
Max | 9bbe160 | 2016-07-18 12:50:18 +0200 | [diff] [blame] | 35 | #include <osmocom/gsm/protocol/gsm_04_08.h> |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 36 | } |
| 37 | |
Jacob Erlbeck | 1c3b899 | 2015-08-14 16:01:36 +0200 | [diff] [blame] | 38 | #define GPRS_CODEL_SLOW_INTERVAL_MS 4000 |
Jacob Erlbeck | d4ad731 | 2015-07-17 16:39:09 +0200 | [diff] [blame] | 39 | |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 40 | extern void *tall_pcu_ctx; |
| 41 | |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 42 | static int64_t now_msec() |
| 43 | { |
| 44 | struct timespec ts; |
| 45 | clock_gettime(CLOCK_MONOTONIC, &ts); |
| 46 | |
| 47 | return int64_t(ts.tv_sec) * 1000 + ts.tv_nsec / 1000000; |
| 48 | } |
| 49 | |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 50 | struct GprsMsDefaultCallback: public GprsMs::Callback { |
| 51 | virtual void ms_idle(class GprsMs *ms) { |
| 52 | delete ms; |
| 53 | } |
| 54 | virtual void ms_active(class GprsMs *) {} |
| 55 | }; |
| 56 | |
| 57 | static GprsMsDefaultCallback gprs_default_cb; |
| 58 | |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 59 | GprsMs::Guard::Guard(GprsMs *ms) : |
| 60 | m_ms(ms ? ms->ref() : NULL) |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 61 | { |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 62 | } |
| 63 | |
| 64 | GprsMs::Guard::~Guard() |
| 65 | { |
| 66 | if (m_ms) |
| 67 | m_ms->unref(); |
| 68 | } |
| 69 | |
Jacob Erlbeck | b2439bb | 2015-07-13 14:23:32 +0200 | [diff] [blame] | 70 | bool GprsMs::Guard::is_idle() const |
| 71 | { |
| 72 | if (!m_ms) |
| 73 | return true; |
| 74 | |
| 75 | return !m_ms->m_ul_tbf && !m_ms->m_dl_tbf && m_ms->m_ref == 1; |
| 76 | } |
| 77 | |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 78 | void GprsMs::timeout(void *priv_) |
| 79 | { |
| 80 | GprsMs *ms = static_cast<GprsMs *>(priv_); |
| 81 | |
| 82 | LOGP(DRLCMAC, LOGL_INFO, "Timeout for MS object, TLLI = 0x%08x\n", |
| 83 | ms->tlli()); |
| 84 | |
| 85 | if (ms->m_timer.data) { |
| 86 | ms->m_timer.data = NULL; |
| 87 | ms->unref(); |
| 88 | } |
| 89 | } |
| 90 | |
Jacob Erlbeck | 17214bb | 2015-06-02 14:06:12 +0200 | [diff] [blame] | 91 | GprsMs::GprsMs(BTS *bts, uint32_t tlli) : |
| 92 | m_bts(bts), |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 93 | m_cb(&gprs_default_cb), |
| 94 | m_ul_tbf(NULL), |
| 95 | m_dl_tbf(NULL), |
| 96 | m_tlli(tlli), |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 97 | m_new_ul_tlli(0), |
| 98 | m_new_dl_tlli(0), |
Max | 9bbe160 | 2016-07-18 12:50:18 +0200 | [diff] [blame] | 99 | m_ta(GSM48_TA_INVALID), |
Jacob Erlbeck | befc760 | 2015-06-02 12:33:30 +0200 | [diff] [blame] | 100 | m_ms_class(0), |
Jacob Erlbeck | c3c5804 | 2015-09-28 17:55:32 +0200 | [diff] [blame] | 101 | m_egprs_ms_class(0), |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 102 | m_is_idle(true), |
Jacob Erlbeck | 5367086 | 2015-05-12 17:54:33 +0200 | [diff] [blame] | 103 | m_ref(0), |
Jacob Erlbeck | 25db7c6 | 2015-06-11 12:59:01 +0200 | [diff] [blame] | 104 | m_list(this), |
Jacob Erlbeck | 04a1086 | 2015-06-12 16:01:56 +0200 | [diff] [blame] | 105 | m_delay(0), |
Jacob Erlbeck | 23f93a1 | 2015-06-30 08:52:54 +0200 | [diff] [blame] | 106 | m_nack_rate_dl(0), |
| 107 | m_reserved_dl_slots(0), |
| 108 | m_reserved_ul_slots(0), |
Jacob Erlbeck | d4ad731 | 2015-07-17 16:39:09 +0200 | [diff] [blame] | 109 | m_current_trx(NULL), |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 110 | m_codel_state(NULL), |
sivasankari | da7250a | 2016-12-16 12:57:18 +0530 | [diff] [blame] | 111 | m_mode(GprsCodingScheme::GPRS), |
| 112 | m_dl_ctrl_msg(0) |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 113 | { |
Jacob Erlbeck | d4ad731 | 2015-07-17 16:39:09 +0200 | [diff] [blame] | 114 | int codel_interval = LLC_CODEL_USE_DEFAULT; |
| 115 | |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 116 | LOGP(DRLCMAC, LOGL_INFO, "Creating MS object, TLLI = 0x%08x\n", tlli); |
Jacob Erlbeck | b0e5eaf | 2015-05-21 11:07:16 +0200 | [diff] [blame] | 117 | |
| 118 | m_imsi[0] = 0; |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 119 | memset(&m_timer, 0, sizeof(m_timer)); |
| 120 | m_timer.cb = GprsMs::timeout; |
Jacob Erlbeck | 489a2b3 | 2015-05-28 19:07:01 +0200 | [diff] [blame] | 121 | m_llc_queue.init(); |
Jacob Erlbeck | a700dd9 | 2015-06-02 16:00:41 +0200 | [diff] [blame] | 122 | |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 123 | set_mode(m_mode); |
Jacob Erlbeck | d4ad731 | 2015-07-17 16:39:09 +0200 | [diff] [blame] | 124 | |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 125 | if (m_bts) |
Jacob Erlbeck | d4ad731 | 2015-07-17 16:39:09 +0200 | [diff] [blame] | 126 | codel_interval = m_bts->bts_data()->llc_codel_interval_msec; |
Jacob Erlbeck | d4ad731 | 2015-07-17 16:39:09 +0200 | [diff] [blame] | 127 | |
| 128 | if (codel_interval) { |
| 129 | if (codel_interval == LLC_CODEL_USE_DEFAULT) |
| 130 | codel_interval = GPRS_CODEL_SLOW_INTERVAL_MS; |
| 131 | m_codel_state = talloc(this, struct gprs_codel); |
| 132 | gprs_codel_init(m_codel_state); |
| 133 | gprs_codel_set_interval(m_codel_state, codel_interval); |
Jacob Erlbeck | a700dd9 | 2015-06-02 16:00:41 +0200 | [diff] [blame] | 134 | } |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 135 | m_last_cs_not_low = now_msec(); |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 136 | } |
| 137 | |
| 138 | GprsMs::~GprsMs() |
| 139 | { |
Jacob Erlbeck | 6835cea | 2015-08-21 15:24:02 +0200 | [diff] [blame] | 140 | LListHead<gprs_rlcmac_tbf> *pos, *tmp; |
| 141 | |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 142 | LOGP(DRLCMAC, LOGL_INFO, "Destroying MS object, TLLI = 0x%08x\n", tlli()); |
Jacob Erlbeck | fecece0 | 2015-05-08 12:13:08 +0200 | [diff] [blame] | 143 | |
Jacob Erlbeck | 23f93a1 | 2015-06-30 08:52:54 +0200 | [diff] [blame] | 144 | set_reserved_slots(NULL, 0, 0); |
| 145 | |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 146 | if (osmo_timer_pending(&m_timer)) |
| 147 | osmo_timer_del(&m_timer); |
| 148 | |
Jacob Erlbeck | fecece0 | 2015-05-08 12:13:08 +0200 | [diff] [blame] | 149 | if (m_ul_tbf) { |
| 150 | m_ul_tbf->set_ms(NULL); |
| 151 | m_ul_tbf = NULL; |
| 152 | } |
| 153 | |
| 154 | if (m_dl_tbf) { |
| 155 | m_dl_tbf->set_ms(NULL); |
| 156 | m_dl_tbf = NULL; |
| 157 | } |
Jacob Erlbeck | 6835cea | 2015-08-21 15:24:02 +0200 | [diff] [blame] | 158 | |
| 159 | llist_for_each_safe(pos, tmp, &m_old_tbfs) |
| 160 | pos->entry()->set_ms(NULL); |
| 161 | |
Jacob Erlbeck | 17214bb | 2015-06-02 14:06:12 +0200 | [diff] [blame] | 162 | m_llc_queue.clear(m_bts); |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 163 | } |
| 164 | |
| 165 | void* GprsMs::operator new(size_t size) |
| 166 | { |
| 167 | static void *tall_ms_ctx = NULL; |
| 168 | if (!tall_ms_ctx) |
| 169 | tall_ms_ctx = talloc_named_const(tall_pcu_ctx, 0, __PRETTY_FUNCTION__); |
| 170 | |
| 171 | return talloc_size(tall_ms_ctx, size); |
| 172 | } |
| 173 | |
| 174 | void GprsMs::operator delete(void* p) |
| 175 | { |
| 176 | talloc_free(p); |
| 177 | } |
| 178 | |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 179 | GprsMs *GprsMs::ref() |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 180 | { |
| 181 | m_ref += 1; |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 182 | return this; |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 183 | } |
| 184 | |
| 185 | void GprsMs::unref() |
| 186 | { |
| 187 | OSMO_ASSERT(m_ref >= 0); |
| 188 | m_ref -= 1; |
| 189 | if (m_ref == 0) |
| 190 | update_status(); |
| 191 | } |
| 192 | |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 193 | void GprsMs::start_timer() |
| 194 | { |
| 195 | if (m_delay == 0) |
| 196 | return; |
| 197 | |
| 198 | if (!m_timer.data) |
| 199 | m_timer.data = ref(); |
| 200 | |
| 201 | osmo_timer_schedule(&m_timer, m_delay, 0); |
| 202 | } |
| 203 | |
| 204 | void GprsMs::stop_timer() |
| 205 | { |
| 206 | if (!m_timer.data) |
| 207 | return; |
| 208 | |
| 209 | osmo_timer_del(&m_timer); |
| 210 | m_timer.data = NULL; |
| 211 | unref(); |
| 212 | } |
| 213 | |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 214 | void GprsMs::set_mode(GprsCodingScheme::Mode mode) |
| 215 | { |
| 216 | m_mode = mode; |
| 217 | |
Jacob Erlbeck | 53bc186 | 2016-01-18 17:23:09 +0100 | [diff] [blame] | 218 | if (!m_bts) |
| 219 | return; |
| 220 | |
Holger Hans Peter Freyther | 99db40a | 2016-03-04 18:19:02 +0100 | [diff] [blame] | 221 | switch (m_mode) { |
| 222 | case GprsCodingScheme::GPRS: |
| 223 | if (!m_current_cs_ul.isGprs()) { |
| 224 | m_current_cs_ul = GprsCodingScheme::getGprsByNum( |
| 225 | m_bts->bts_data()->initial_cs_ul); |
| 226 | if (!m_current_cs_ul.isValid()) |
| 227 | m_current_cs_ul = GprsCodingScheme::CS1; |
| 228 | } |
| 229 | if (!m_current_cs_dl.isGprs()) { |
| 230 | m_current_cs_dl = GprsCodingScheme::getGprsByNum( |
| 231 | m_bts->bts_data()->initial_cs_dl); |
| 232 | if (!m_current_cs_dl.isValid()) |
| 233 | m_current_cs_dl = GprsCodingScheme::CS1; |
| 234 | } |
| 235 | break; |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 236 | |
Holger Hans Peter Freyther | 99db40a | 2016-03-04 18:19:02 +0100 | [diff] [blame] | 237 | case GprsCodingScheme::EGPRS_GMSK: |
| 238 | case GprsCodingScheme::EGPRS: |
| 239 | if (!m_current_cs_ul.isEgprs()) { |
| 240 | m_current_cs_ul = GprsCodingScheme::getEgprsByNum( |
| 241 | m_bts->bts_data()->initial_mcs_ul); |
Holger Hans Peter Freyther | fd263b0 | 2016-03-04 18:24:50 +0100 | [diff] [blame] | 242 | if (!m_current_cs_ul.isValid()) |
Holger Hans Peter Freyther | 99db40a | 2016-03-04 18:19:02 +0100 | [diff] [blame] | 243 | m_current_cs_ul = GprsCodingScheme::MCS1; |
| 244 | } |
| 245 | if (!m_current_cs_dl.isEgprs()) { |
| 246 | m_current_cs_dl = GprsCodingScheme::getEgprsByNum( |
| 247 | m_bts->bts_data()->initial_mcs_dl); |
| 248 | if (!m_current_cs_dl.isValid()) |
| 249 | m_current_cs_dl = GprsCodingScheme::MCS1; |
| 250 | } |
| 251 | break; |
| 252 | } |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 253 | } |
| 254 | |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 255 | void GprsMs::attach_tbf(struct gprs_rlcmac_tbf *tbf) |
| 256 | { |
| 257 | if (tbf->direction == GPRS_RLCMAC_DL_TBF) |
Jacob Erlbeck | aa9daa1 | 2015-12-28 18:49:12 +0100 | [diff] [blame] | 258 | attach_dl_tbf(as_dl_tbf(tbf)); |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 259 | else |
Jacob Erlbeck | aa9daa1 | 2015-12-28 18:49:12 +0100 | [diff] [blame] | 260 | attach_ul_tbf(as_ul_tbf(tbf)); |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 261 | } |
| 262 | |
| 263 | void GprsMs::attach_ul_tbf(struct gprs_rlcmac_ul_tbf *tbf) |
| 264 | { |
| 265 | if (m_ul_tbf == tbf) |
| 266 | return; |
| 267 | |
| 268 | LOGP(DRLCMAC, LOGL_INFO, "Attaching TBF to MS object, TLLI = 0x%08x, TBF = %s\n", |
| 269 | tlli(), tbf->name()); |
| 270 | |
| 271 | Guard guard(this); |
| 272 | |
| 273 | if (m_ul_tbf) |
Jacob Erlbeck | 6835cea | 2015-08-21 15:24:02 +0200 | [diff] [blame] | 274 | llist_add_tail(&m_ul_tbf->ms_list(), &m_old_tbfs); |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 275 | |
| 276 | m_ul_tbf = tbf; |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 277 | |
| 278 | if (tbf) |
| 279 | stop_timer(); |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 280 | } |
| 281 | |
| 282 | void GprsMs::attach_dl_tbf(struct gprs_rlcmac_dl_tbf *tbf) |
| 283 | { |
| 284 | if (m_dl_tbf == tbf) |
| 285 | return; |
| 286 | |
| 287 | LOGP(DRLCMAC, LOGL_INFO, "Attaching TBF to MS object, TLLI = 0x%08x, TBF = %s\n", |
| 288 | tlli(), tbf->name()); |
| 289 | |
| 290 | Guard guard(this); |
| 291 | |
| 292 | if (m_dl_tbf) |
Jacob Erlbeck | 6835cea | 2015-08-21 15:24:02 +0200 | [diff] [blame] | 293 | llist_add_tail(&m_dl_tbf->ms_list(), &m_old_tbfs); |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 294 | |
| 295 | m_dl_tbf = tbf; |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 296 | |
| 297 | if (tbf) |
| 298 | stop_timer(); |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 299 | } |
| 300 | |
| 301 | void GprsMs::detach_tbf(gprs_rlcmac_tbf *tbf) |
| 302 | { |
Jacob Erlbeck | 6835cea | 2015-08-21 15:24:02 +0200 | [diff] [blame] | 303 | if (tbf == static_cast<gprs_rlcmac_tbf *>(m_ul_tbf)) { |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 304 | m_ul_tbf = NULL; |
Jacob Erlbeck | 6835cea | 2015-08-21 15:24:02 +0200 | [diff] [blame] | 305 | } else if (tbf == static_cast<gprs_rlcmac_tbf *>(m_dl_tbf)) { |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 306 | m_dl_tbf = NULL; |
Jacob Erlbeck | 6835cea | 2015-08-21 15:24:02 +0200 | [diff] [blame] | 307 | } else { |
| 308 | bool found = false; |
| 309 | |
| 310 | LListHead<gprs_rlcmac_tbf> *pos, *tmp; |
| 311 | llist_for_each_safe(pos, tmp, &m_old_tbfs) { |
| 312 | if (pos->entry() == tbf) { |
| 313 | llist_del(pos); |
| 314 | found = true; |
| 315 | break; |
| 316 | } |
| 317 | } |
| 318 | |
| 319 | /* Protect against recursive calls via set_ms() */ |
| 320 | if (!found) |
| 321 | return; |
| 322 | } |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 323 | |
| 324 | LOGP(DRLCMAC, LOGL_INFO, "Detaching TBF from MS object, TLLI = 0x%08x, TBF = %s\n", |
| 325 | tlli(), tbf->name()); |
| 326 | |
Jacob Erlbeck | fecece0 | 2015-05-08 12:13:08 +0200 | [diff] [blame] | 327 | if (tbf->ms() == this) |
| 328 | tbf->set_ms(NULL); |
| 329 | |
Jacob Erlbeck | 23f93a1 | 2015-06-30 08:52:54 +0200 | [diff] [blame] | 330 | if (!m_dl_tbf && !m_ul_tbf) { |
| 331 | set_reserved_slots(NULL, 0, 0); |
| 332 | |
| 333 | if (tlli() != 0) |
| 334 | start_timer(); |
| 335 | } |
Jacob Erlbeck | d9e1024 | 2015-05-28 15:43:53 +0200 | [diff] [blame] | 336 | |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 337 | update_status(); |
| 338 | } |
| 339 | |
| 340 | void GprsMs::update_status() |
| 341 | { |
| 342 | if (m_ref > 0) |
| 343 | return; |
| 344 | |
| 345 | if (is_idle() && !m_is_idle) { |
| 346 | m_is_idle = true; |
| 347 | m_cb->ms_idle(this); |
| 348 | /* this can be deleted by now, do not access it */ |
| 349 | return; |
| 350 | } |
| 351 | |
| 352 | if (!is_idle() && m_is_idle) { |
| 353 | m_is_idle = false; |
| 354 | m_cb->ms_active(this); |
| 355 | } |
| 356 | } |
| 357 | |
Jacob Erlbeck | ac28905 | 2015-08-14 12:50:54 +0200 | [diff] [blame] | 358 | void GprsMs::reset() |
| 359 | { |
| 360 | LOGP(DRLCMAC, LOGL_INFO, |
| 361 | "Clearing MS object, TLLI: 0x%08x, IMSI: '%s'\n", |
| 362 | tlli(), imsi()); |
| 363 | |
| 364 | stop_timer(); |
| 365 | |
| 366 | m_tlli = 0; |
| 367 | m_new_dl_tlli = 0; |
| 368 | m_new_ul_tlli = 0; |
| 369 | m_imsi[0] = '\0'; |
| 370 | } |
| 371 | |
Jacob Erlbeck | 2b349b5 | 2015-08-18 11:55:03 +0200 | [diff] [blame] | 372 | void GprsMs::merge_old_ms(GprsMs *old_ms) |
| 373 | { |
| 374 | if (old_ms == this) |
| 375 | return; |
| 376 | |
| 377 | if (strlen(imsi()) == 0 && strlen(old_ms->imsi()) != 0) |
| 378 | set_imsi(old_ms->imsi()); |
| 379 | |
| 380 | if (!ms_class() && old_ms->ms_class()) |
| 381 | set_ms_class(old_ms->ms_class()); |
| 382 | |
Jacob Erlbeck | e0b21f4 | 2015-08-21 18:30:05 +0200 | [diff] [blame] | 383 | m_llc_queue.move_and_merge(&old_ms->m_llc_queue); |
| 384 | |
Jacob Erlbeck | 2b349b5 | 2015-08-18 11:55:03 +0200 | [diff] [blame] | 385 | old_ms->reset(); |
| 386 | } |
| 387 | |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 388 | void GprsMs::set_tlli(uint32_t tlli) |
| 389 | { |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 390 | if (tlli == m_tlli || tlli == m_new_ul_tlli) |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 391 | return; |
| 392 | |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 393 | if (tlli != m_new_dl_tlli) { |
| 394 | LOGP(DRLCMAC, LOGL_INFO, |
| 395 | "Modifying MS object, UL TLLI: 0x%08x -> 0x%08x, " |
| 396 | "not yet confirmed\n", |
| 397 | this->tlli(), tlli); |
| 398 | m_new_ul_tlli = tlli; |
| 399 | return; |
| 400 | } |
| 401 | |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 402 | LOGP(DRLCMAC, LOGL_INFO, |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 403 | "Modifying MS object, TLLI: 0x%08x -> 0x%08x, " |
| 404 | "already confirmed partly\n", |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 405 | m_tlli, tlli); |
| 406 | |
| 407 | m_tlli = tlli; |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 408 | m_new_dl_tlli = 0; |
| 409 | m_new_ul_tlli = 0; |
| 410 | } |
| 411 | |
| 412 | bool GprsMs::confirm_tlli(uint32_t tlli) |
| 413 | { |
| 414 | if (tlli == m_tlli || tlli == m_new_dl_tlli) |
| 415 | return false; |
| 416 | |
| 417 | if (tlli != m_new_ul_tlli) { |
| 418 | /* The MS has not sent a message with the new TLLI, which may |
| 419 | * happen according to the spec [TODO: add reference]. */ |
| 420 | |
| 421 | LOGP(DRLCMAC, LOGL_INFO, |
| 422 | "The MS object cannot fully confirm an unexpected TLLI: 0x%08x, " |
| 423 | "partly confirmed\n", tlli); |
| 424 | /* Use the network's idea of TLLI as candidate, this does not |
| 425 | * change the result value of tlli() */ |
| 426 | m_new_dl_tlli = tlli; |
| 427 | return false; |
| 428 | } |
| 429 | |
| 430 | LOGP(DRLCMAC, LOGL_INFO, |
| 431 | "Modifying MS object, TLLI: 0x%08x confirmed\n", tlli); |
| 432 | |
| 433 | m_tlli = tlli; |
| 434 | m_new_dl_tlli = 0; |
| 435 | m_new_ul_tlli = 0; |
| 436 | |
| 437 | return true; |
Jacob Erlbeck | e04e0b0 | 2015-05-06 18:30:48 +0200 | [diff] [blame] | 438 | } |
Jacob Erlbeck | b0e5eaf | 2015-05-21 11:07:16 +0200 | [diff] [blame] | 439 | |
| 440 | void GprsMs::set_imsi(const char *imsi) |
| 441 | { |
| 442 | if (!imsi) { |
| 443 | LOGP(DRLCMAC, LOGL_ERROR, "Expected IMSI!\n"); |
| 444 | return; |
| 445 | } |
| 446 | |
| 447 | if (imsi[0] && strlen(imsi) < 3) { |
| 448 | LOGP(DRLCMAC, LOGL_ERROR, "No valid IMSI '%s'!\n", |
| 449 | imsi); |
| 450 | return; |
| 451 | } |
| 452 | |
| 453 | if (strcmp(imsi, m_imsi) == 0) |
| 454 | return; |
| 455 | |
| 456 | LOGP(DRLCMAC, LOGL_INFO, |
| 457 | "Modifying MS object, TLLI = 0x%08x, IMSI '%s' -> '%s'\n", |
| 458 | tlli(), m_imsi, imsi); |
| 459 | |
| 460 | strncpy(m_imsi, imsi, sizeof(m_imsi)); |
| 461 | m_imsi[sizeof(m_imsi) - 1] = '\0'; |
| 462 | } |
| 463 | |
Jacob Erlbeck | 9200ce6 | 2015-05-22 17:48:04 +0200 | [diff] [blame] | 464 | void GprsMs::set_ta(uint8_t ta_) |
| 465 | { |
| 466 | if (ta_ == m_ta) |
| 467 | return; |
| 468 | |
Max | 9bbe160 | 2016-07-18 12:50:18 +0200 | [diff] [blame] | 469 | if (gsm48_ta_is_valid(ta_)) { |
| 470 | LOGP(DRLCMAC, LOGL_INFO, |
| 471 | "Modifying MS object, TLLI = 0x%08x, TA %d -> %d\n", |
| 472 | tlli(), m_ta, ta_); |
| 473 | m_ta = ta_; |
| 474 | } else |
| 475 | LOGP(DRLCMAC, LOGL_NOTICE, |
| 476 | "MS object, TLLI = 0x%08x, invalid TA %d rejected (old " |
| 477 | "value %d kept)\n", tlli(), ta_, m_ta); |
Jacob Erlbeck | 9200ce6 | 2015-05-22 17:48:04 +0200 | [diff] [blame] | 478 | } |
| 479 | |
Jacob Erlbeck | befc760 | 2015-06-02 12:33:30 +0200 | [diff] [blame] | 480 | void GprsMs::set_ms_class(uint8_t ms_class_) |
| 481 | { |
| 482 | if (ms_class_ == m_ms_class) |
| 483 | return; |
| 484 | |
| 485 | LOGP(DRLCMAC, LOGL_INFO, |
| 486 | "Modifying MS object, TLLI = 0x%08x, MS class %d -> %d\n", |
| 487 | tlli(), m_ms_class, ms_class_); |
| 488 | |
| 489 | m_ms_class = ms_class_; |
| 490 | } |
| 491 | |
Jacob Erlbeck | c3c5804 | 2015-09-28 17:55:32 +0200 | [diff] [blame] | 492 | void GprsMs::set_egprs_ms_class(uint8_t ms_class_) |
| 493 | { |
| 494 | if (ms_class_ == m_egprs_ms_class) |
| 495 | return; |
| 496 | |
| 497 | LOGP(DRLCMAC, LOGL_INFO, |
| 498 | "Modifying MS object, TLLI = 0x%08x, EGPRS MS class %d -> %d\n", |
| 499 | tlli(), m_egprs_ms_class, ms_class_); |
| 500 | |
| 501 | m_egprs_ms_class = ms_class_; |
| 502 | } |
| 503 | |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 504 | void GprsMs::update_error_rate(gprs_rlcmac_tbf *tbf, int error_rate) |
| 505 | { |
| 506 | struct gprs_rlcmac_bts *bts_data; |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 507 | int64_t now; |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 508 | GprsCodingScheme max_cs_dl = this->max_cs_dl(); |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 509 | |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 510 | OSMO_ASSERT(max_cs_dl); |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 511 | bts_data = m_bts->bts_data(); |
| 512 | |
| 513 | if (error_rate < 0) |
| 514 | return; |
| 515 | |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 516 | now = now_msec(); |
| 517 | |
Jacob Erlbeck | 94cde13 | 2015-06-09 09:44:36 +0200 | [diff] [blame] | 518 | /* TODO: Check for TBF direction */ |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 519 | /* TODO: Support different CS values for UL and DL */ |
| 520 | |
Jacob Erlbeck | 04a1086 | 2015-06-12 16:01:56 +0200 | [diff] [blame] | 521 | m_nack_rate_dl = error_rate; |
| 522 | |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 523 | if (error_rate > bts_data->cs_adj_upper_limit) { |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 524 | if (m_current_cs_dl.to_num() > 1) { |
| 525 | m_current_cs_dl.dec(mode()); |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 526 | LOGP(DRLCMACDL, LOGL_INFO, |
| 527 | "MS (IMSI %s): High error rate %d%%, " |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 528 | "reducing CS level to %s\n", |
| 529 | imsi(), error_rate, m_current_cs_dl.name()); |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 530 | m_last_cs_not_low = now; |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 531 | } |
| 532 | } else if (error_rate < bts_data->cs_adj_lower_limit) { |
Jacob Erlbeck | b33e675 | 2015-06-04 19:04:30 +0200 | [diff] [blame] | 533 | if (m_current_cs_dl < max_cs_dl) { |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 534 | if (now - m_last_cs_not_low > 1000) { |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 535 | m_current_cs_dl.inc(mode()); |
Jacob Erlbeck | b33e675 | 2015-06-04 19:04:30 +0200 | [diff] [blame] | 536 | |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 537 | LOGP(DRLCMACDL, LOGL_INFO, |
| 538 | "MS (IMSI %s): Low error rate %d%%, " |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 539 | "increasing DL CS level to %s\n", |
| 540 | imsi(), error_rate, |
| 541 | m_current_cs_dl.name()); |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 542 | m_last_cs_not_low = now; |
| 543 | } else { |
| 544 | LOGP(DRLCMACDL, LOGL_DEBUG, |
| 545 | "MS (IMSI %s): Low error rate %d%%, " |
| 546 | "ignored (within blocking period)\n", |
| 547 | imsi(), error_rate); |
| 548 | } |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 549 | } |
| 550 | } else { |
| 551 | LOGP(DRLCMACDL, LOGL_DEBUG, |
| 552 | "MS (IMSI %s): Medium error rate %d%%, ignored\n", |
| 553 | imsi(), error_rate); |
Jacob Erlbeck | 8158ea7 | 2015-06-04 17:46:33 +0200 | [diff] [blame] | 554 | m_last_cs_not_low = now; |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 555 | } |
| 556 | } |
Jacob Erlbeck | e4bcb62 | 2015-06-08 11:26:38 +0200 | [diff] [blame] | 557 | |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 558 | GprsCodingScheme GprsMs::max_cs_ul() const |
Jacob Erlbeck | e4bcb62 | 2015-06-08 11:26:38 +0200 | [diff] [blame] | 559 | { |
Jacob Erlbeck | 94cde13 | 2015-06-09 09:44:36 +0200 | [diff] [blame] | 560 | struct gprs_rlcmac_bts *bts_data; |
Jacob Erlbeck | 94cde13 | 2015-06-09 09:44:36 +0200 | [diff] [blame] | 561 | |
| 562 | OSMO_ASSERT(m_bts != NULL); |
| 563 | bts_data = m_bts->bts_data(); |
| 564 | |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 565 | if (m_current_cs_ul.isGprs()) { |
| 566 | if (!bts_data->max_cs_ul) |
| 567 | return GprsCodingScheme(GprsCodingScheme::CS4); |
Jacob Erlbeck | 94cde13 | 2015-06-09 09:44:36 +0200 | [diff] [blame] | 568 | |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 569 | return GprsCodingScheme::getGprsByNum(bts_data->max_cs_ul); |
Jacob Erlbeck | 94cde13 | 2015-06-09 09:44:36 +0200 | [diff] [blame] | 570 | } |
| 571 | |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 572 | if (!m_current_cs_ul.isEgprs()) |
| 573 | return GprsCodingScheme(); /* UNKNOWN */ |
| 574 | |
| 575 | if (bts_data->max_mcs_ul) |
| 576 | return GprsCodingScheme::getEgprsByNum(bts_data->max_mcs_ul); |
| 577 | else if (bts_data->max_cs_ul) |
| 578 | return GprsCodingScheme::getEgprsByNum(bts_data->max_cs_ul); |
| 579 | |
| 580 | return GprsCodingScheme(GprsCodingScheme::MCS4); |
| 581 | } |
| 582 | |
Aravind Sirsikar | e8ccafc | 2016-07-13 11:37:47 +0530 | [diff] [blame] | 583 | void GprsMs::set_current_cs_dl(GprsCodingScheme::Scheme scheme) |
| 584 | { |
| 585 | m_current_cs_dl = scheme; |
| 586 | } |
| 587 | |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 588 | GprsCodingScheme GprsMs::max_cs_dl() const |
| 589 | { |
| 590 | struct gprs_rlcmac_bts *bts_data; |
| 591 | |
| 592 | OSMO_ASSERT(m_bts != NULL); |
| 593 | bts_data = m_bts->bts_data(); |
| 594 | |
| 595 | if (m_current_cs_dl.isGprs()) { |
| 596 | if (!bts_data->max_cs_dl) |
| 597 | return GprsCodingScheme(GprsCodingScheme::CS4); |
| 598 | |
| 599 | return GprsCodingScheme::getGprsByNum(bts_data->max_cs_dl); |
| 600 | } |
| 601 | |
| 602 | if (!m_current_cs_dl.isEgprs()) |
| 603 | return GprsCodingScheme(); /* UNKNOWN */ |
| 604 | |
| 605 | if (bts_data->max_mcs_dl) |
| 606 | return GprsCodingScheme::getEgprsByNum(bts_data->max_mcs_dl); |
| 607 | else if (bts_data->max_cs_dl) |
| 608 | return GprsCodingScheme::getEgprsByNum(bts_data->max_cs_dl); |
| 609 | |
| 610 | return GprsCodingScheme(GprsCodingScheme::MCS4); |
| 611 | } |
| 612 | |
| 613 | void GprsMs::update_cs_ul(const pcu_l1_meas *meas) |
| 614 | { |
| 615 | struct gprs_rlcmac_bts *bts_data; |
| 616 | GprsCodingScheme max_cs_ul = this->max_cs_ul(); |
| 617 | |
| 618 | int old_link_qual; |
| 619 | int low; |
| 620 | int high; |
| 621 | GprsCodingScheme new_cs_ul = m_current_cs_ul; |
| 622 | unsigned current_cs_num = m_current_cs_ul.to_num(); |
| 623 | |
| 624 | bts_data = m_bts->bts_data(); |
| 625 | |
| 626 | if (!max_cs_ul) { |
Minh-Quang Nguyen | 1f18909 | 2017-08-16 09:50:06 -0400 | [diff] [blame] | 627 | LOGP(DRLCMACMEAS, LOGL_ERROR, |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 628 | "max_cs_ul cannot be derived (current UL CS: %s)\n", |
| 629 | m_current_cs_ul.name()); |
| 630 | return; |
| 631 | } |
| 632 | |
Max | 1962136 | 2017-09-08 12:33:34 +0200 | [diff] [blame] | 633 | OSMO_ASSERT(current_cs_num > 0); |
| 634 | |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 635 | if (!m_current_cs_ul) |
| 636 | return; |
| 637 | |
| 638 | if (!meas->have_link_qual) |
| 639 | return; |
| 640 | |
| 641 | old_link_qual = meas->link_qual; |
| 642 | |
| 643 | if (m_current_cs_ul.isGprs()) { |
| 644 | low = bts_data->cs_lqual_ranges[current_cs_num-1].low; |
| 645 | high = bts_data->cs_lqual_ranges[current_cs_num-1].high; |
| 646 | } else if (m_current_cs_ul.isEgprs()) { |
Aravind Sirsikar | 99ab0a8 | 2016-06-15 17:46:41 +0530 | [diff] [blame] | 647 | if (current_cs_num > MAX_GPRS_CS) |
| 648 | current_cs_num = MAX_GPRS_CS; |
Minh-Quang Nguyen | 1f18909 | 2017-08-16 09:50:06 -0400 | [diff] [blame] | 649 | low = bts_data->mcs_lqual_ranges[current_cs_num-1].low; |
| 650 | high = bts_data->mcs_lqual_ranges[current_cs_num-1].high; |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 651 | } else { |
| 652 | return; |
| 653 | } |
| 654 | |
| 655 | if (m_l1_meas.have_link_qual) |
| 656 | old_link_qual = m_l1_meas.link_qual; |
| 657 | |
| 658 | if (meas->link_qual < low && old_link_qual < low) |
| 659 | new_cs_ul.dec(mode()); |
| 660 | else if (meas->link_qual > high && old_link_qual > high && |
| 661 | m_current_cs_ul < max_cs_ul) |
| 662 | new_cs_ul.inc(mode()); |
| 663 | |
| 664 | if (m_current_cs_ul != new_cs_ul) { |
Minh-Quang Nguyen | 1f18909 | 2017-08-16 09:50:06 -0400 | [diff] [blame] | 665 | LOGP(DRLCMACMEAS, LOGL_INFO, |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 666 | "MS (IMSI %s): " |
| 667 | "Link quality %ddB (%ddB) left window [%d, %d], " |
| 668 | "modifying uplink CS level: %s -> %s\n", |
| 669 | imsi(), meas->link_qual, old_link_qual, |
| 670 | low, high, |
| 671 | m_current_cs_ul.name(), new_cs_ul.name()); |
| 672 | |
| 673 | m_current_cs_ul = new_cs_ul; |
| 674 | } |
| 675 | } |
| 676 | |
| 677 | void GprsMs::update_l1_meas(const pcu_l1_meas *meas) |
| 678 | { |
| 679 | unsigned i; |
| 680 | |
| 681 | update_cs_ul(meas); |
| 682 | |
Jacob Erlbeck | e4bcb62 | 2015-06-08 11:26:38 +0200 | [diff] [blame] | 683 | if (meas->have_rssi) |
| 684 | m_l1_meas.set_rssi(meas->rssi); |
| 685 | if (meas->have_bto) |
| 686 | m_l1_meas.set_bto(meas->bto); |
| 687 | if (meas->have_ber) |
| 688 | m_l1_meas.set_ber(meas->ber); |
| 689 | if (meas->have_link_qual) |
| 690 | m_l1_meas.set_link_qual(meas->link_qual); |
Jacob Erlbeck | 51b1151 | 2015-06-11 16:54:50 +0200 | [diff] [blame] | 691 | |
| 692 | if (meas->have_ms_rx_qual) |
| 693 | m_l1_meas.set_ms_rx_qual(meas->ms_rx_qual); |
| 694 | if (meas->have_ms_c_value) |
| 695 | m_l1_meas.set_ms_c_value(meas->ms_c_value); |
| 696 | if (meas->have_ms_sign_var) |
| 697 | m_l1_meas.set_ms_sign_var(meas->ms_sign_var); |
| 698 | |
| 699 | if (meas->have_ms_i_level) { |
| 700 | for (i = 0; i < ARRAY_SIZE(meas->ts); ++i) { |
| 701 | if (meas->ts[i].have_ms_i_level) |
| 702 | m_l1_meas.set_ms_i_level(i, meas->ts[i].ms_i_level); |
| 703 | else |
| 704 | m_l1_meas.ts[i].have_ms_i_level = 0; |
| 705 | } |
| 706 | } |
Jacob Erlbeck | e4bcb62 | 2015-06-08 11:26:38 +0200 | [diff] [blame] | 707 | } |
Jacob Erlbeck | 70b96aa | 2015-06-12 10:52:34 +0200 | [diff] [blame] | 708 | |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 709 | GprsCodingScheme GprsMs::current_cs_dl() const |
Jacob Erlbeck | 70b96aa | 2015-06-12 10:52:34 +0200 | [diff] [blame] | 710 | { |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 711 | GprsCodingScheme cs = m_current_cs_dl; |
Jacob Erlbeck | 70b96aa | 2015-06-12 10:52:34 +0200 | [diff] [blame] | 712 | size_t unencoded_octets; |
| 713 | |
| 714 | if (!m_bts) |
| 715 | return cs; |
| 716 | |
| 717 | unencoded_octets = m_llc_queue.octets(); |
| 718 | |
| 719 | /* If the DL TBF is active, add number of unencoded chunk octets */ |
| 720 | if (m_dl_tbf) |
Jacob Erlbeck | 14e26cb | 2016-02-03 15:26:29 +0100 | [diff] [blame] | 721 | unencoded_octets += m_dl_tbf->m_llc.chunk_size(); |
Jacob Erlbeck | 70b96aa | 2015-06-12 10:52:34 +0200 | [diff] [blame] | 722 | |
| 723 | /* There are many unencoded octets, don't reduce */ |
| 724 | if (unencoded_octets >= m_bts->bts_data()->cs_downgrade_threshold) |
| 725 | return cs; |
| 726 | |
| 727 | /* RF conditions are good, don't reduce */ |
| 728 | if (m_nack_rate_dl < m_bts->bts_data()->cs_adj_lower_limit) |
| 729 | return cs; |
| 730 | |
| 731 | /* The throughput would probably be better if the CS level was reduced */ |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 732 | cs.dec(mode()); |
Jacob Erlbeck | 70b96aa | 2015-06-12 10:52:34 +0200 | [diff] [blame] | 733 | |
| 734 | /* CS-2 doesn't gain throughput with small packets, further reduce to CS-1 */ |
Jacob Erlbeck | cb72890 | 2016-01-05 15:33:03 +0100 | [diff] [blame] | 735 | if (cs == GprsCodingScheme(GprsCodingScheme::CS2)) |
| 736 | cs.dec(mode()); |
Jacob Erlbeck | 70b96aa | 2015-06-12 10:52:34 +0200 | [diff] [blame] | 737 | |
| 738 | return cs; |
| 739 | } |
| 740 | |
Jacob Erlbeck | 699b8dc | 2015-06-29 14:05:55 +0200 | [diff] [blame] | 741 | int GprsMs::first_common_ts() const |
| 742 | { |
| 743 | if (m_dl_tbf) |
| 744 | return m_dl_tbf->first_common_ts; |
| 745 | |
| 746 | if (m_ul_tbf) |
| 747 | return m_ul_tbf->first_common_ts; |
| 748 | |
| 749 | return -1; |
| 750 | } |
| 751 | |
Jacob Erlbeck | 617c712 | 2015-06-30 09:18:30 +0200 | [diff] [blame] | 752 | uint8_t GprsMs::dl_slots() const |
| 753 | { |
| 754 | uint8_t slots = 0; |
| 755 | |
| 756 | if (m_dl_tbf) |
| 757 | slots |= m_dl_tbf->dl_slots(); |
| 758 | |
| 759 | if (m_ul_tbf) |
| 760 | slots |= m_ul_tbf->dl_slots(); |
| 761 | |
| 762 | return slots; |
| 763 | } |
| 764 | |
| 765 | uint8_t GprsMs::ul_slots() const |
| 766 | { |
| 767 | uint8_t slots = 0; |
| 768 | |
| 769 | if (m_dl_tbf) |
| 770 | slots |= m_dl_tbf->ul_slots(); |
| 771 | |
| 772 | if (m_ul_tbf) |
| 773 | slots |= m_ul_tbf->ul_slots(); |
| 774 | |
| 775 | return slots; |
| 776 | } |
| 777 | |
Jacob Erlbeck | 7c72aca | 2016-01-22 17:06:14 +0100 | [diff] [blame] | 778 | uint8_t GprsMs::current_pacch_slots() const |
| 779 | { |
| 780 | uint8_t slots = 0; |
| 781 | |
| 782 | bool is_dl_active = m_dl_tbf && m_dl_tbf->is_tfi_assigned(); |
| 783 | bool is_ul_active = m_ul_tbf && m_ul_tbf->is_tfi_assigned(); |
| 784 | |
| 785 | if (!is_dl_active && !is_ul_active) |
| 786 | return 0; |
| 787 | |
| 788 | /* see TS 44.060, 8.1.1.2.2 */ |
| 789 | if (is_dl_active && !is_ul_active) |
| 790 | slots = m_dl_tbf->dl_slots(); |
| 791 | else if (!is_dl_active && is_ul_active) |
| 792 | slots = m_ul_tbf->ul_slots(); |
| 793 | else |
| 794 | slots = m_ul_tbf->ul_slots() & m_dl_tbf->dl_slots(); |
| 795 | |
| 796 | /* Assume a multislot class 1 device */ |
| 797 | /* TODO: For class 2 devices, this could be removed */ |
| 798 | slots = pcu_lsb(slots); |
| 799 | |
| 800 | return slots; |
| 801 | } |
| 802 | |
Jacob Erlbeck | 23f93a1 | 2015-06-30 08:52:54 +0200 | [diff] [blame] | 803 | void GprsMs::set_reserved_slots(gprs_rlcmac_trx *trx, |
| 804 | uint8_t ul_slots, uint8_t dl_slots) |
| 805 | { |
| 806 | if (m_current_trx) { |
| 807 | m_current_trx->unreserve_slots(GPRS_RLCMAC_DL_TBF, |
| 808 | m_reserved_dl_slots); |
| 809 | m_current_trx->unreserve_slots(GPRS_RLCMAC_UL_TBF, |
| 810 | m_reserved_ul_slots); |
| 811 | m_reserved_dl_slots = 0; |
| 812 | m_reserved_ul_slots = 0; |
| 813 | } |
| 814 | m_current_trx = trx; |
| 815 | if (trx) { |
| 816 | m_reserved_dl_slots = dl_slots; |
| 817 | m_reserved_ul_slots = ul_slots; |
| 818 | m_current_trx->reserve_slots(GPRS_RLCMAC_DL_TBF, |
| 819 | m_reserved_dl_slots); |
| 820 | m_current_trx->reserve_slots(GPRS_RLCMAC_UL_TBF, |
| 821 | m_reserved_ul_slots); |
| 822 | } |
| 823 | } |
| 824 | |
Jacob Erlbeck | ac89a55 | 2015-06-29 14:18:46 +0200 | [diff] [blame] | 825 | gprs_rlcmac_tbf *GprsMs::tbf(enum gprs_rlcmac_tbf_direction dir) const |
| 826 | { |
| 827 | switch (dir) { |
| 828 | case GPRS_RLCMAC_DL_TBF: return m_dl_tbf; |
| 829 | case GPRS_RLCMAC_UL_TBF: return m_ul_tbf; |
| 830 | } |
| 831 | |
| 832 | return NULL; |
| 833 | } |