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bhargava_abhyankar gerrit-no-reply at lists.osmocom.orgReview at https://gerrit.osmocom.org/1168 11bit RACH support for osmo-bts-litecell15 Based on the indication from L1, number of bits in RACH and burst type is determined. Appropriate parameters are filled in osmo-bts-litecell15. These parameters are sent to osmo-pcu for processing of the RACH. Change-Id: Ie5207a15424fb287febf74e830297531232accde --- M src/osmo-bts-litecell15/l1_if.c 1 file changed, 40 insertions(+), 3 deletions(-) git pull ssh://gerrit.osmocom.org:29418/osmo-bts refs/changes/68/1168/1 diff --git a/src/osmo-bts-litecell15/l1_if.c b/src/osmo-bts-litecell15/l1_if.c index f47634e..edc5f5b 100644 --- a/src/osmo-bts-litecell15/l1_if.c +++ b/src/osmo-bts-litecell15/l1_if.c @@ -945,7 +945,8 @@ struct gsm_lchan *lchan; struct osmo_phsap_prim *l1sap; uint32_t fn; - uint8_t ra, acc_delay = 0; + uint8_t acc_delay = 0; + uint16_t ra = 0, is_11bit = 0, burst_type = 0, temp = 0; int rc; /* increment number of busy RACH slots, if required */ @@ -967,16 +968,29 @@ 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; + ra = ra_ind->msgUnitParam.u8Buffer[0]; + ra = ra << 3; + temp = (ra_ind->msgUnitParam.u8Buffer[1] & 0x7); + ra = ra | temp; + } 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"); @@ -986,6 +1000,29 @@ l1sap->u.rach_ind.ra = ra; l1sap->u.rach_ind.acc_delay = acc_delay; l1sap->u.rach_ind.fn = fn; + l1sap->u.rach_ind.is_11bit = is_11bit; /* no of bits in 11 bit RACH */ + + /* mapping of the burst type, the values are specific to + * osmo-bts-litecell15 */ + switch (burst_type) { + case GsmL1_BurstType_Access_0: + l1sap->u.rach_ind.burst_type = + GSM_L1_BURST_TYPE_ACCESS_0; + break; + case GsmL1_BurstType_Access_1: + l1sap->u.rach_ind.burst_type = + GSM_L1_BURST_TYPE_ACCESS_1; + break; + case GsmL1_BurstType_Access_2: + l1sap->u.rach_ind.burst_type = + GSM_L1_BURST_TYPE_ACCESS_2; + break; + default: + l1sap->u.rach_ind.burst_type = + GSM_L1_BURST_TYPE_NONE; + break; + } + if (!lchan || lchan->ts->pchan == GSM_PCHAN_CCCH || lchan->ts->pchan == GSM_PCHAN_CCCH_SDCCH4) l1sap->u.rach_ind.chan_nr = 0x88; -- To view, visit https://gerrit.osmocom.org/1168 To unsubscribe, visit https://gerrit.osmocom.org/settings Gerrit-MessageType: newchange Gerrit-Change-Id: Ie5207a15424fb287febf74e830297531232accde Gerrit-PatchSet: 1 Gerrit-Project: osmo-bts Gerrit-Branch: master Gerrit-Owner: bhargava_abhyankar <Bhargava.Abhyankar at radisys.com>