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