ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 1 | /* -*- c++ -*- */ |
ptrkrysik | 529895b | 2014-12-02 18:07:38 +0100 | [diff] [blame] | 2 | /* |
| 3 | * @file |
| 4 | * @author Piotr Krysik <ptrkrysik@gmail.com> |
| 5 | * @section LICENSE |
| 6 | * |
| 7 | * Gr-gsm is free software; you can redistribute it and/or modify |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 3, or (at your option) |
| 10 | * any later version. |
ptrkrysik | 529895b | 2014-12-02 18:07:38 +0100 | [diff] [blame] | 11 | * |
| 12 | * Gr-gsm is distributed in the hope that it will be useful, |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
ptrkrysik | 529895b | 2014-12-02 18:07:38 +0100 | [diff] [blame] | 16 | * |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 17 | * You should have received a copy of the GNU General Public License |
ptrkrysik | 529895b | 2014-12-02 18:07:38 +0100 | [diff] [blame] | 18 | * along with gr-gsm; see the file COPYING. If not, write to |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 19 | * the Free Software Foundation, Inc., 51 Franklin Street, |
| 20 | * Boston, MA 02110-1301, USA. |
| 21 | */ |
| 22 | |
| 23 | #ifdef HAVE_CONFIG_H |
| 24 | #include "config.h" |
| 25 | #endif |
| 26 | |
| 27 | #include <gnuradio/io_signature.h> |
| 28 | #include "universal_ctrl_chans_demapper_impl.h" |
ptrkrysik | 3be74a7 | 2014-12-13 10:11:00 +0100 | [diff] [blame] | 29 | #include <grgsm/endian.h> |
| 30 | #include <grgsm/gsmtap.h> |
ptrkrysik | 42411c6 | 2015-07-08 10:50:41 +0200 | [diff] [blame] | 31 | #include <set> |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 32 | |
| 33 | namespace gr { |
| 34 | namespace gsm { |
| 35 | |
| 36 | universal_ctrl_chans_demapper::sptr |
Piotr Krysik | 9f723fd | 2015-08-06 10:23:52 +0200 | [diff] [blame^] | 37 | universal_ctrl_chans_demapper::make(unsigned int timeslot_nr, const std::vector<int> &downlink_starts_fn_mod51, const std::vector<int> &downlink_channel_types, const std::vector<int> &uplink_starts_fn_mod51, const std::vector<int> &uplink_channel_types) |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 38 | { |
| 39 | return gnuradio::get_initial_sptr |
Piotr Krysik | 9f723fd | 2015-08-06 10:23:52 +0200 | [diff] [blame^] | 40 | (new universal_ctrl_chans_demapper_impl(timeslot_nr, downlink_starts_fn_mod51, downlink_channel_types, uplink_starts_fn_mod51, uplink_channel_types)); |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 41 | } |
| 42 | |
| 43 | /* |
| 44 | * The private constructor |
| 45 | */ |
Piotr Krysik | 9f723fd | 2015-08-06 10:23:52 +0200 | [diff] [blame^] | 46 | universal_ctrl_chans_demapper_impl::universal_ctrl_chans_demapper_impl(unsigned int timeslot_nr, const std::vector<int> &downlink_starts_fn_mod51, const std::vector<int> &downlink_channel_types, const std::vector<int> &uplink_starts_fn_mod51, const std::vector<int> &uplink_channel_types) |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 47 | : gr::block("universal_ctrl_chans_demapper", |
| 48 | gr::io_signature::make(0, 0, 0), |
ptrkrysik | d8d4fbc | 2015-02-07 19:37:42 +0100 | [diff] [blame] | 49 | gr::io_signature::make(0, 0, 0)), |
| 50 | d_timeslot(timeslot_nr) |
| 51 | |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 52 | { |
| 53 | |
ptrkrysik | d8d4fbc | 2015-02-07 19:37:42 +0100 | [diff] [blame] | 54 | |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 55 | for(int ii=0; ii<51; ii++) |
| 56 | { |
Piotr Krysik | 9f723fd | 2015-08-06 10:23:52 +0200 | [diff] [blame^] | 57 | d_downlink_starts_fn_mod51[ii]=0; |
| 58 | d_downlink_channel_types[ii]=0; |
| 59 | d_downlink_subslots[ii] = 0; |
| 60 | d_downlink_subslots[ii+51] = 0; |
| 61 | |
| 62 | d_uplink_starts_fn_mod51[ii]=0; |
| 63 | d_uplink_channel_types[ii]=0; |
| 64 | d_uplink_subslots[ii] = 0; |
| 65 | d_uplink_subslots[ii+51] = 0; |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 66 | } |
| 67 | |
| 68 | std::vector<int>::const_iterator s; |
| 69 | std::vector<int>::const_iterator ch_type; |
| 70 | |
Piotr Krysik | 9f723fd | 2015-08-06 10:23:52 +0200 | [diff] [blame^] | 71 | for(s=downlink_starts_fn_mod51.begin(), ch_type=downlink_channel_types.begin();s != downlink_starts_fn_mod51.end(); s++) |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 72 | { |
Roman Khassraf | 939edef | 2015-04-12 15:20:38 +0200 | [diff] [blame] | 73 | if((*s >= 0) and (*s <= (51-4))) |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 74 | { |
| 75 | for(int ii=0; ii<4; ii++){ |
Piotr Krysik | 9f723fd | 2015-08-06 10:23:52 +0200 | [diff] [blame^] | 76 | d_downlink_starts_fn_mod51[*s+ii] = *s; |
| 77 | if(ch_type!=downlink_channel_types.end()) |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 78 | { |
Piotr Krysik | 9f723fd | 2015-08-06 10:23:52 +0200 | [diff] [blame^] | 79 | d_downlink_channel_types[*s+ii] = *ch_type; |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 80 | } |
| 81 | } |
Piotr Krysik | 9f723fd | 2015-08-06 10:23:52 +0200 | [diff] [blame^] | 82 | if(ch_type!=downlink_channel_types.end()) |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 83 | { |
| 84 | ch_type++; |
| 85 | } |
| 86 | } |
| 87 | } |
| 88 | |
Piotr Krysik | 9f723fd | 2015-08-06 10:23:52 +0200 | [diff] [blame^] | 89 | for(s=uplink_starts_fn_mod51.begin(), ch_type=uplink_channel_types.begin();s != uplink_starts_fn_mod51.end(); s++) |
| 90 | { |
| 91 | if((*s >= 0) and (*s <= (51-4))) |
| 92 | { |
| 93 | for(int ii=0; ii<4; ii++){ |
| 94 | d_uplink_starts_fn_mod51[*s+ii] = *s; |
| 95 | if(ch_type!=uplink_channel_types.end()) |
| 96 | { |
| 97 | d_uplink_channel_types[*s+ii] = *ch_type; |
| 98 | } |
| 99 | } |
| 100 | if(ch_type!=uplink_channel_types.end()) |
| 101 | { |
| 102 | ch_type++; |
| 103 | } |
| 104 | } |
| 105 | } |
Roman Khassraf | e571e96 | 2015-04-12 15:35:41 +0200 | [diff] [blame] | 106 | |
Piotr Krysik | 9f723fd | 2015-08-06 10:23:52 +0200 | [diff] [blame^] | 107 | std::set<int> distinct_downlink_channels(downlink_channel_types.begin(), downlink_channel_types.end()); |
| 108 | std::set<int>::iterator it; |
| 109 | unsigned int subslot; |
| 110 | |
| 111 | for (it=distinct_downlink_channels.begin(); it != distinct_downlink_channels.end(); it++) |
| 112 | { |
| 113 | subslot = 0; |
| 114 | for(s=downlink_starts_fn_mod51.begin();s != downlink_starts_fn_mod51.end(); s++) |
| 115 | { |
| 116 | if ((d_downlink_channel_types[*s] == *it) and (*s >= 0) and (*s <= (51-4))) |
| 117 | { |
| 118 | for(int ii=0; ii<4; ii++) |
| 119 | { |
| 120 | d_downlink_subslots[*s+ii] = subslot; |
| 121 | d_downlink_subslots[*s+ii+51] = subslot; |
| 122 | } |
| 123 | subslot++; |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | if (*it == GSMTAP_CHANNEL_ACCH or |
| 128 | *it == (GSMTAP_CHANNEL_ACCH|GSMTAP_CHANNEL_SDCCH) or |
| 129 | *it == (GSMTAP_CHANNEL_ACCH|GSMTAP_CHANNEL_SDCCH4) or |
| 130 | *it == (GSMTAP_CHANNEL_ACCH|GSMTAP_CHANNEL_SDCCH8) or |
| 131 | *it == (GSMTAP_CHANNEL_ACCH|GSMTAP_CHANNEL_TCH_F) or |
| 132 | *it == (GSMTAP_CHANNEL_ACCH|GSMTAP_CHANNEL_TCH_H) |
| 133 | ) |
| 134 | { |
| 135 | for(s=downlink_starts_fn_mod51.begin();s != downlink_starts_fn_mod51.end(); s++) |
| 136 | { |
| 137 | if ((d_downlink_channel_types[*s] == *it) and (*s >= 0) and (*s <= (51-4))) |
| 138 | { |
| 139 | for(int ii=0; ii<4; ii++) |
| 140 | { |
| 141 | d_downlink_subslots[*s+ii+51] = subslot; |
| 142 | } |
| 143 | subslot++; |
| 144 | } |
| 145 | } |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | std::set<int> distinct_uplink_channels(uplink_channel_types.begin(), uplink_channel_types.end()); |
| 150 | for (it=distinct_uplink_channels.begin(); it != distinct_uplink_channels.end(); it++) |
| 151 | { |
| 152 | subslot = 0; |
| 153 | for(s=uplink_starts_fn_mod51.begin();s != uplink_starts_fn_mod51.end(); s++) |
| 154 | { |
| 155 | if ((d_uplink_channel_types[*s] == *it) and (*s >= 0) and (*s <= (51-4))) |
| 156 | { |
| 157 | for(int ii=0; ii<4; ii++) |
| 158 | { |
| 159 | d_uplink_subslots[*s+ii] = subslot; |
| 160 | d_uplink_subslots[*s+ii+51] = subslot; |
| 161 | } |
| 162 | subslot++; |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | if (*it == GSMTAP_CHANNEL_ACCH or |
| 167 | *it == (GSMTAP_CHANNEL_ACCH|GSMTAP_CHANNEL_SDCCH) or |
| 168 | *it == (GSMTAP_CHANNEL_ACCH|GSMTAP_CHANNEL_SDCCH4) or |
| 169 | *it == (GSMTAP_CHANNEL_ACCH|GSMTAP_CHANNEL_SDCCH8) or |
| 170 | *it == (GSMTAP_CHANNEL_ACCH|GSMTAP_CHANNEL_TCH_F) or |
| 171 | *it == (GSMTAP_CHANNEL_ACCH|GSMTAP_CHANNEL_TCH_H) |
| 172 | ) |
| 173 | { |
| 174 | for(s=uplink_starts_fn_mod51.begin();s != uplink_starts_fn_mod51.end(); s++) |
| 175 | { |
| 176 | if ((d_uplink_channel_types[*s] == *it) and (*s >= 0) and (*s <= (51-4))) |
| 177 | { |
| 178 | for(int ii=0; ii<4; ii++) |
| 179 | { |
| 180 | d_uplink_subslots[*s+ii+51] = subslot; |
| 181 | } |
| 182 | subslot++; |
| 183 | } |
| 184 | } |
| 185 | } |
| 186 | } |
| 187 | |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 188 | |
| 189 | message_port_register_in(pmt::mp("bursts")); |
| 190 | set_msg_handler(pmt::mp("bursts"), boost::bind(&universal_ctrl_chans_demapper_impl::filter_ctrl_chans, this, _1)); |
| 191 | message_port_register_out(pmt::mp("bursts")); |
| 192 | } |
| 193 | |
| 194 | /* |
| 195 | * Our virtual destructor. |
| 196 | */ |
| 197 | universal_ctrl_chans_demapper_impl::~universal_ctrl_chans_demapper_impl() |
| 198 | { |
| 199 | } |
| 200 | |
| 201 | void universal_ctrl_chans_demapper_impl::filter_ctrl_chans(pmt::pmt_t msg) |
| 202 | { |
ptrkrysik | 617ba03 | 2014-11-21 10:11:05 +0100 | [diff] [blame] | 203 | pmt::pmt_t header_plus_burst = pmt::cdr(msg); |
| 204 | gsmtap_hdr * header = (gsmtap_hdr *)pmt::blob_data(header_plus_burst); |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 205 | |
ptrkrysik | 617ba03 | 2014-11-21 10:11:05 +0100 | [diff] [blame] | 206 | uint32_t frame_nr = be32toh(header->frame_number); |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 207 | uint32_t fn_mod51 = frame_nr % 51; |
Roman Khassraf | 275a087 | 2015-04-12 15:17:47 +0200 | [diff] [blame] | 208 | |
Piotr Krysik | 9f723fd | 2015-08-06 10:23:52 +0200 | [diff] [blame^] | 209 | bool uplink_burst = (be16toh(header->arfcn) & 0x4000) ? true : false; |
| 210 | |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 211 | if(header->timeslot==d_timeslot){ |
Piotr Krysik | 9f723fd | 2015-08-06 10:23:52 +0200 | [diff] [blame^] | 212 | if(uplink_burst) |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 213 | { |
Piotr Krysik | 9f723fd | 2015-08-06 10:23:52 +0200 | [diff] [blame^] | 214 | uint32_t fn51_start = d_uplink_starts_fn_mod51[fn_mod51]; |
| 215 | uint32_t fn51_stop = fn51_start + 3; |
| 216 | uint32_t ch_type = d_uplink_channel_types[fn_mod51]; |
| 217 | |
| 218 | if(ch_type != 0) |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 219 | { |
Piotr Krysik | 9f723fd | 2015-08-06 10:23:52 +0200 | [diff] [blame^] | 220 | header->sub_type = ch_type; |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 221 | } |
Piotr Krysik | 9f723fd | 2015-08-06 10:23:52 +0200 | [diff] [blame^] | 222 | header->sub_slot = d_uplink_subslots[fn_mod51 + (51 * (frame_nr % 2))]; |
| 223 | |
| 224 | if(fn_mod51>=fn51_start && fn_mod51<=fn51_stop) |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 225 | { |
Piotr Krysik | 9f723fd | 2015-08-06 10:23:52 +0200 | [diff] [blame^] | 226 | uint32_t ii = fn_mod51 - fn51_start; |
| 227 | d_uplink_frame_numbers[ii] = frame_nr; |
| 228 | d_uplink_bursts[ii] = msg; |
| 229 | } |
| 230 | |
| 231 | if(fn_mod51==fn51_stop) |
| 232 | { |
| 233 | //check for a situation where some bursts were lost |
| 234 | //in this situation frame numbers won't be consecutive |
| 235 | bool frames_are_consecutive = true; |
| 236 | for(int jj=1; jj<4; jj++) |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 237 | { |
Piotr Krysik | 9f723fd | 2015-08-06 10:23:52 +0200 | [diff] [blame^] | 238 | if((d_uplink_frame_numbers[jj]-d_uplink_frame_numbers[jj-1])!=1) |
| 239 | { |
| 240 | frames_are_consecutive = false; |
| 241 | } |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 242 | } |
Piotr Krysik | 9f723fd | 2015-08-06 10:23:52 +0200 | [diff] [blame^] | 243 | if(frames_are_consecutive) |
| 244 | { |
| 245 | //send bursts to the output |
| 246 | for(int jj=0; jj<4; jj++) |
| 247 | { |
| 248 | message_port_pub(pmt::mp("bursts"), d_uplink_bursts[jj]); |
| 249 | } |
| 250 | } |
| 251 | } |
| 252 | } |
| 253 | else |
| 254 | { |
| 255 | uint32_t fn51_start = d_downlink_starts_fn_mod51[fn_mod51]; |
| 256 | uint32_t fn51_stop = fn51_start + 3; |
| 257 | uint32_t ch_type = d_downlink_channel_types[fn_mod51]; |
| 258 | |
| 259 | if(ch_type != 0) |
| 260 | { |
| 261 | header->sub_type = ch_type; |
| 262 | } |
| 263 | header->sub_slot = d_downlink_subslots[fn_mod51 + (51 * (frame_nr % 2))]; |
| 264 | |
| 265 | if(fn_mod51>=fn51_start && fn_mod51<=fn51_stop) |
| 266 | { |
| 267 | uint32_t ii = fn_mod51 - fn51_start; |
| 268 | d_downlink_frame_numbers[ii] = frame_nr; |
| 269 | d_downlink_bursts[ii] = msg; |
| 270 | } |
| 271 | |
| 272 | if(fn_mod51==fn51_stop) |
| 273 | { |
| 274 | //check for a situation where some bursts were lost |
| 275 | //in this situation frame numbers won't be consecutive |
| 276 | bool frames_are_consecutive = true; |
| 277 | for(int jj=1; jj<4; jj++) |
| 278 | { |
| 279 | if((d_downlink_frame_numbers[jj]-d_downlink_frame_numbers[jj-1])!=1) |
| 280 | { |
| 281 | frames_are_consecutive = false; |
| 282 | } |
| 283 | } |
| 284 | if(frames_are_consecutive) |
| 285 | { |
| 286 | //send bursts to the output |
| 287 | for(int jj=0; jj<4; jj++) |
| 288 | { |
| 289 | message_port_pub(pmt::mp("bursts"), d_downlink_bursts[jj]); |
| 290 | } |
| 291 | } |
| 292 | } |
ptrkrysik | 6dded65 | 2014-11-19 11:32:05 +0100 | [diff] [blame] | 293 | } |
| 294 | } |
| 295 | } |
| 296 | } /* namespace gsm */ |
| 297 | } /* namespace gr */ |
| 298 | |