Based on the indication from L1, number of bits in RACH and burst type is determined. Appropriate parameters are filled in osmo-bts. These parameters are sent to osmo-pcu for processing of the RACH. --- src/osmo-bts-sysmo/l1_if.c | 23 +++++++++++++++-------- 1 file changed, 15 insertions(+), 8 deletions(-)

diff --git a/src/osmo-bts-sysmo/l1_if.c b/src/osmo-bts-sysmo/l1_if.c index a8f957c..1aec989 100644 --- a/src/osmo-bts-sysmo/l1_if.c +++ b/src/osmo-bts-sysmo/l1_if.c @@ -857,7 +857,7 @@ static int handle_ph_ra_ind(struct femtol1_hdl *fl1, GsmL1_PhRaInd_t *ra_ind, struct gsm_lchan *lchan; struct osmo_phsap_prim *l1sap; uint32_t fn; - uint8_t ra, acc_delay = 0; + uint16_t ra, acc_delay = 0, is_11bit = 0, burst_type = 0; int rc;

/* increment number of busy RACH slots, if required */ @@ -879,16 +879,25 @@ static int handle_ph_ra_ind(struct femtol1_hdl *fl1, GsmL1_PhRaInd_t *ra_ind, btsb->load.rach.access++;

dump_meas_res(LOGL_DEBUG, &ra_ind->measParam); + burst_type = ra_ind->burstType;

- if (ra_ind->msgUnitParam.u8Size != 1) { + if ((ra_ind->msgUnitParam.u8Size != 1) && + (ra_ind->msgUnitParam.u8Size != 2)) { LOGP(DL1C, LOGL_ERROR, "PH-RACH-INDICATION has %d bits\n", ra_ind->sapi); msgb_free(l1p_msg); return 0; }

+ if (ra_ind->msgUnitParam.u8Size == 2) { + is_11bit = 1; + memcpy(&ra, ra_ind->msgUnitParam.u8Buffer, 2); + } else { + is_11bit = 0; + ra = ra_ind->msgUnitParam.u8Buffer[0]; + } + fn = ra_ind->u32Fn; - ra = ra_ind->msgUnitParam.u8Buffer[0]; rc = msgb_trim(l1p_msg, sizeof(*l1sap)); if (rc < 0) MSGB_ABORT(l1p_msg, "No room for primitive data\n"); @@ -898,11 +907,8 @@ static int handle_ph_ra_ind(struct femtol1_hdl *fl1, GsmL1_PhRaInd_t *ra_ind, l1sap->u.rach_ind.ra = ra; l1sap->u.rach_ind.acc_delay = acc_delay; l1sap->u.rach_ind.fn = fn; - - /* Initialising the parameters needs to be handled when 11 bit RACH - * is supported */ - l1sap->u.rach_ind.is_11bit = 0; - l1sap->u.rach_ind.burst = GSM_L1_BURST_TYPE_ACCESS_0; + l1sap->u.rach_ind.is_11bit = is_11bit; /* no of bits in 11 bit RACH */ + l1sap->u.rach_ind.burst = burst_type; /* type of burst */

if (!lchan || lchan->ts->pchan == GSM_PCHAN_CCCH || lchan->ts->pchan == GSM_PCHAN_CCCH_SDCCH4) @@ -911,6 +917,7 @@ static int handle_ph_ra_ind(struct femtol1_hdl *fl1, GsmL1_PhRaInd_t *ra_ind, l1sap->u.rach_ind.chan_nr = gsm_lchan2chan_nr(lchan);

return l1sap_up(trx, l1sap); + }

/* handle any random indication from the L1 */