Vadim Yanitskiy | 89fc14b | 2017-06-16 21:00:29 +0700 | [diff] [blame] | 1 | <?xml version="1.0"?> |
| 2 | <block> |
Vadim Yanitskiy | e601c36 | 2017-10-17 08:24:25 +0700 | [diff] [blame] | 3 | <name>TRX Burst Interface</name> |
Vadim Yanitskiy | 8e9b307 | 2017-10-17 09:24:26 +0700 | [diff] [blame] | 4 | <key>gsm_trx_burst_if</key> |
Vadim Yanitskiy | 89fc14b | 2017-06-16 21:00:29 +0700 | [diff] [blame] | 5 | <import>import grgsm</import> |
Vadim Yanitskiy | 5394c60 | 2018-08-10 00:01:26 +0700 | [diff] [blame] | 6 | <make>grgsm.trx_burst_if($bind_addr, $remote_addr, $base_port)</make> |
Vadim Yanitskiy | 89fc14b | 2017-06-16 21:00:29 +0700 | [diff] [blame] | 7 | |
| 8 | <param> |
| 9 | <name>base_port</name> |
| 10 | <key>base_port</key> |
| 11 | <value>5700</value> |
| 12 | <type>string</type> |
| 13 | </param> |
| 14 | |
| 15 | <param> |
Vadim Yanitskiy | 5394c60 | 2018-08-10 00:01:26 +0700 | [diff] [blame] | 16 | <name>bind_addr</name> |
| 17 | <key>bind_addr</key> |
| 18 | <value>0.0.0.0</value> |
| 19 | <type>string</type> |
| 20 | </param> |
| 21 | |
| 22 | <param> |
Vadim Yanitskiy | 89fc14b | 2017-06-16 21:00:29 +0700 | [diff] [blame] | 23 | <name>remote_addr</name> |
| 24 | <key>remote_addr</key> |
| 25 | <value>127.0.0.1</value> |
| 26 | <type>string</type> |
| 27 | </param> |
| 28 | |
| 29 | <sink> |
| 30 | <name>bursts</name> |
| 31 | <type>message</type> |
Vadim Yanitskiy | 780816d | 2017-07-19 03:06:17 +0700 | [diff] [blame] | 32 | <optional>1</optional> |
Vadim Yanitskiy | 89fc14b | 2017-06-16 21:00:29 +0700 | [diff] [blame] | 33 | </sink> |
| 34 | |
Vadim Yanitskiy | ac3a527 | 2017-07-19 03:05:07 +0700 | [diff] [blame] | 35 | <source> |
| 36 | <name>bursts</name> |
| 37 | <type>message</type> |
Vadim Yanitskiy | 780816d | 2017-07-19 03:06:17 +0700 | [diff] [blame] | 38 | <optional>1</optional> |
Vadim Yanitskiy | ac3a527 | 2017-07-19 03:05:07 +0700 | [diff] [blame] | 39 | </source> |
| 40 | |
Vadim Yanitskiy | 89fc14b | 2017-06-16 21:00:29 +0700 | [diff] [blame] | 41 | <doc> |
Vadim Yanitskiy | 25916f3 | 2017-10-17 08:46:12 +0700 | [diff] [blame] | 42 | OsmoTRX like UDP burst interface for external applications. |
Vadim Yanitskiy | 89fc14b | 2017-06-16 21:00:29 +0700 | [diff] [blame] | 43 | |
Vadim Yanitskiy | 25916f3 | 2017-10-17 08:46:12 +0700 | [diff] [blame] | 44 | There are two UDP connections, where each message carries |
| 45 | one radio burst with header. Give a base port B (5700 by default). |
| 46 | One connection at port P=B+100+2 is used for sending received bursts |
| 47 | to an external application. Another one at port P=B+2 is used to |
| 48 | obtain to be transmitted bursts. |
Vadim Yanitskiy | 89fc14b | 2017-06-16 21:00:29 +0700 | [diff] [blame] | 49 | |
Vadim Yanitskiy | 25916f3 | 2017-10-17 08:46:12 +0700 | [diff] [blame] | 50 | Received burst format: |
Vadim Yanitskiy | 89fc14b | 2017-06-16 21:00:29 +0700 | [diff] [blame] | 51 | 1 byte timeslot index |
| 52 | 4 bytes GSM frame number, big endian |
| 53 | 1 byte RSSI in -dBm |
| 54 | 2 bytes correlator timing offset in 1/256 symbol steps, |
| 55 | 2's-comp, big endian |
| 56 | 148 bytes soft symbol estimates, 0 -> definite "0", |
| 57 | 255 -> definite "1" |
| 58 | |
Vadim Yanitskiy | 25916f3 | 2017-10-17 08:46:12 +0700 | [diff] [blame] | 59 | To be transmitted burst format: |
Vadim Yanitskiy | 89fc14b | 2017-06-16 21:00:29 +0700 | [diff] [blame] | 60 | 1 byte timeslot index |
| 61 | 4 bytes GSM frame number, big endian |
| 62 | 1 byte transmit level wrt ARFCN max, -dB (attenuation) |
| 63 | 148 bytes output symbol values, 0 & 1 |
| 64 | </doc> |
| 65 | </block> |