diff options
| author | Vadim Yanitskiy <vyanitskiy@sysmocom.de> | 2023-07-13 03:42:03 +0700 |
|---|---|---|
| committer | laforge <laforge@osmocom.org> | 2023-07-21 11:12:50 +0000 |
| commit | 98e5d6f7c6934aafbf0c290b89d7ee8df8eec182 (patch) | |
| tree | e930d2a23edceef5a1c55fe7f736570a719893e0 | |
| parent | 29fcae86324f5d004574e51c827c90523150e86f (diff) | |
osmo-bts-trx: document/clarify the meaning of BUFMAX=24
Change-Id: I95d4e4ee3938cfabc1695959cc82a1efbbf0d7ed
Related: OS#1572
| -rw-r--r-- | include/osmo-bts/scheduler.h | 2 | ||||
| -rw-r--r-- | src/osmo-bts-trx/sched_utils.h | 4 |
2 files changed, 4 insertions, 2 deletions
diff --git a/include/osmo-bts/scheduler.h b/include/osmo-bts/scheduler.h index 23d01fb8..94333ea4 100644 --- a/include/osmo-bts/scheduler.h +++ b/include/osmo-bts/scheduler.h @@ -132,7 +132,7 @@ struct l1sched_chan_state { /* Uplink measurements */ struct { /* Active channel measurements (simple ring buffer) */ - struct l1sched_meas_set buf[24]; /* up to 24 entries */ + struct l1sched_meas_set buf[24]; /* up to 24 (BUFMAX) entries */ unsigned int current; /* current position */ /* Interference measurements */ diff --git a/src/osmo-bts-trx/sched_utils.h b/src/osmo-bts-trx/sched_utils.h index 4e8c17e9..20bd6e76 100644 --- a/src/osmo-bts-trx/sched_utils.h +++ b/src/osmo-bts-trx/sched_utils.h @@ -26,7 +26,9 @@ /* Burst Payload LENgth (short alias) */ #define BPLEN GSM_NBITS_NB_GMSK_PAYLOAD -/* Burst BUFfer capacity (in BPLEN units) */ +/* Burst BUFfer capacity (in BPLEN units). Why 24? Because CSD frames + * are interleaved over 22 bursts, but on TCH/F we decode every 4th burst, + * so it must be a multiple of 4. See also 'doc/trx_sched_tch.txt'. */ #define BUFMAX 24 /* Burst BUFfer position macros */ |