diff options
| author | Sylvain Munaut <246tnt@gmail.com> | 2009-12-22 13:43:26 +0100 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2009-12-22 13:43:26 +0100 |
| commit | 4010f1e6f4d3f1c702be836a2342aefd8de73f2a (patch) | |
| tree | 8ff802db314cb78a3b16452744a32fd28c0cd120 /openbsc/src/gsm_data.c | |
| parent | ff1f19e199bbb0cb9da55e0994d9b1443bba85f7 (diff) | |
bts: Allow config of RACH control parameters tx-integer & max retrans
Tweaking theses can be useful especially tx-integer that influence
both the spread of rach attemps and the delay between two attemps.
Looking up GSM 04.08 3.3.1.1.2 & 10.5.2.29 can help determine good
values. The default are choosed with a wide spacing between attemps
(tx integer = 9 -> T=12 & S=217 (non-combined CCCH/SDCCH) or 115 (for
combined CCCH/SDCCH)). This alleviates the problem of responding to
several RACH attempts by a same MS, allocating several RF channels when
only 1 is needed.
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Diffstat (limited to 'openbsc/src/gsm_data.c')
| -rw-r--r-- | openbsc/src/gsm_data.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/openbsc/src/gsm_data.c b/openbsc/src/gsm_data.c index 12f439be2..d6ebd9224 100644 --- a/openbsc/src/gsm_data.c +++ b/openbsc/src/gsm_data.c @@ -175,6 +175,10 @@ struct gsm_bts *gsm_bts_alloc(struct gsm_network *net, enum gsm_bts_type type, bts->si_common.cell_alloc.data = bts->si_common.data.cell_alloc; bts->si_common.cell_alloc.data_len = sizeof(bts->si_common.data.cell_alloc); + bts->si_common.rach_control.re = 1; /* no re-establishment */ + bts->si_common.rach_control.tx_integer = 9; /* 12 slots spread - 217/115 slots delay */ + bts->si_common.rach_control.max_trans = 3; /* 7 retransmissions */ + bts->si_common.rach_control.t2 = 4; /* no emergency calls */ for (i = 0; i < ARRAY_SIZE(bts->gprs.nsvc); i++) { bts->gprs.nsvc[i].bts = bts; |