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fixeria gerrit-no-reply at lists.osmocom.orgfixeria has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-bts/+/15658 Change subject: common/l1sap: increase ToA precision for packet Access Bursts ...................................................................... common/l1sap: increase ToA precision for packet Access Bursts QTA is a Timing Advance value in units of 1/4 of a symbol. Let's use ToA256 (1/256 of a symbol) field of L1SAP RACH.ind as a base for QTA calculation in order to achieve better precision. Change-Id: I6e6fa7985c430a9bdbd12af2a8b2a5a66f11a41c --- M src/common/l1sap.c 1 file changed, 2 insertions(+), 1 deletion(-) git pull ssh://gerrit.osmocom.org:29418/osmo-bts refs/changes/58/15658/1 diff --git a/src/common/l1sap.c b/src/common/l1sap.c index 0409e2e..c6dfee2 100644 --- a/src/common/l1sap.c +++ b/src/common/l1sap.c @@ -1358,7 +1358,8 @@ LOGPFN(DL1P, LOGL_INFO, rach_ind->fn, "RACH for packet access (toa=%d, ra=%d)\n", rach_ind->acc_delay, rach_ind->ra); - pcu_tx_rach_ind(bts, rach_ind->acc_delay << 2, + /* QTA: Timing Advance in units of 1/4 of a symbol */ + pcu_tx_rach_ind(bts, rach_ind->acc_delay_256bits >> 6, rach_ind->ra, rach_ind->fn, rach_ind->is_11bit, rach_ind->burst_type, PCU_IF_SAPI_RACH); return 0; -- To view, visit https://gerrit.osmocom.org/c/osmo-bts/+/15658 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-bts Gerrit-Branch: master Gerrit-Change-Id: I6e6fa7985c430a9bdbd12af2a8b2a5a66f11a41c Gerrit-Change-Number: 15658 Gerrit-PatchSet: 1 Gerrit-Owner: fixeria <axilirator at gmail.com> Gerrit-MessageType: newchange -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/gerrit-log/attachments/20191002/e8c6ba45/attachment.htm>