diff options
author | Holger Hans Peter Freyther <holger@moiji-mobile.com> | 2014-01-23 13:39:15 +0100 |
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committer | Holger Hans Peter Freyther <holger@moiji-mobile.com> | 2014-01-23 13:39:15 +0100 |
commit | 135dcd950c756a912404867ddb37352bfa55d6d0 (patch) | |
tree | e5cc766bc9c27100fbb1278e623341bfffa8273b /src/osmo-bts-sysmo/l1_if.c | |
parent | f3e295a24f15e924a89b37ad5a29602973b2a6c9 (diff) |
wip.. forward the ta..zecke/channel-ho-wip
Diffstat (limited to 'src/osmo-bts-sysmo/l1_if.c')
-rw-r--r-- | src/osmo-bts-sysmo/l1_if.c | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/src/osmo-bts-sysmo/l1_if.c b/src/osmo-bts-sysmo/l1_if.c index 73e98555..17388369 100644 --- a/src/osmo-bts-sysmo/l1_if.c +++ b/src/osmo-bts-sysmo/l1_if.c @@ -816,9 +816,27 @@ static int handle_ph_data_ind(struct femtol1_hdl *fl1, GsmL1_PhDataInd_t *data_i return rc; } -static int handle_handover(struct gsm_lchan *lchan, GsmL1_PhRaInd_t *ra_ind) +static int check_acc_delay(GsmL1_PhRaInd_t *ra_ind, struct gsm_bts_role_bts *btsb, + uint8_t *acc_delay) { - handover_rach(lchan, ra_ind->msgUnitParam.u8Buffer[0]); + if (ra_ind->measParam.i16BurstTiming < 0) + *acc_delay = 0; + else + *acc_delay = ra_ind->measParam.i16BurstTiming >> 2; + return *acc_delay <= btsb->max_ta; +} + +static int handle_handover(struct gsm_lchan *lchan, struct gsm_bts_role_bts *btsb, + GsmL1_PhRaInd_t *ra_ind) +{ + uint8_t acc_delay; + if (!check_acc_delay(ra_ind, btsb, &acc_delay)) { + LOGP(DHO, LOGL_INFO, "%s ignoring RACH request %u > max_ta(%u)\n", + gsm_lchan_name(lchan), acc_delay, btsb->max_ta); + return 0; + } + + handover_rach(lchan, ra_ind->msgUnitParam.u8Buffer[0], acc_delay); return 0; } @@ -845,7 +863,7 @@ static int handle_ph_ra_ind(struct femtol1_hdl *fl1, GsmL1_PhRaInd_t *ra_ind) */ lchan = l1if_hLayer_to_lchan(trx, ra_ind->hLayer2); if (lchan && lchan->ho.active == HANDOVER_ENABLED) - return handle_handover(lchan, ra_ind); + return handle_handover(lchan, btsb, ra_ind); /* increment number of RACH slots with valid RACH burst */ if (trx == bts->c0) @@ -861,11 +879,7 @@ static int handle_ph_ra_ind(struct femtol1_hdl *fl1, GsmL1_PhRaInd_t *ra_ind) } /* check for under/overflow / sign */ - if (ra_ind->measParam.i16BurstTiming < 0) - acc_delay = 0; - else - acc_delay = ra_ind->measParam.i16BurstTiming >> 2; - if (acc_delay > btsb->max_ta) { + if (!check_acc_delay(ra_ind, btsb, &acc_delay)) { LOGP(DL1C, LOGL_INFO, "ignoring RACH request %u > max_ta(%u)\n", acc_delay, btsb->max_ta); return 0; |