diff options
| author | Andreas Eversberg <jolly@eversberg.eu> | 2012-10-30 16:11:35 +0100 |
|---|---|---|
| committer | Andreas Eversberg <jolly@eversberg.eu> | 2012-10-30 16:11:35 +0100 |
| commit | 570c9716c2681490dfdebf2fba32722e25cc9cc6 (patch) | |
| tree | 62c2b7f9a75d3b0d53c7524504744501dd5795e6 /src/host/layer23/include | |
| parent | 07f83456460a2cdb8d288ac647f04a5bc09dc1cf (diff) | |
Fix: Change T200 of LAPDm if SAPI 0 and SAPI 3 share bandwidth on SDCCH
We use 1 second on FACCH and 2 seconds on SACCH when SMS is transfered
during a call on TCH. There is no impact on bandwidth, because SAPIs use
differen channels.
In order to correctly transfer SMS during SDCCH, the T200 must be raised
from 1 (SAPI 0) to 2 (SAPI 0 and 3), so T200 will not timeout before
receiving acknowledge from BTS. This is because both SAPIs share the same
ressource on SDCCH. After release of SAPI 3, T200 is lowered back to 1.
Diffstat (limited to 'src/host/layer23/include')
| -rw-r--r-- | src/host/layer23/include/osmocom/bb/mobile/gsm48_rr.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/host/layer23/include/osmocom/bb/mobile/gsm48_rr.h b/src/host/layer23/include/osmocom/bb/mobile/gsm48_rr.h index 38ac3611..20121695 100644 --- a/src/host/layer23/include/osmocom/bb/mobile/gsm48_rr.h +++ b/src/host/layer23/include/osmocom/bb/mobile/gsm48_rr.h @@ -5,6 +5,11 @@ #define GSM_TA_CM 55385 +#define T200_DCCH 1 /* SDCCH/FACCH */ +#define T200_DCCH_SHARED 2 /* SDCCH shares SAPI 0 and 3 */ +#define T200_ACCH 2 /* SACCH SAPI 3 */ + + /* GSM 04.07 9.1.2 */ #define GSM48_RR_EST_REQ 0x10 #define GSM48_RR_EST_IND 0x12 |