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I'd like you to reexamine a change. Please visit

https://gerrit.osmocom.org/c/osmo-bts/+/27430

to look at the new patch set (#6).

Change subject: osmo-bts-trx: rx_tchh_fn(): fix HR SID detection (wrong offset) ......................................................................

osmo-bts-trx: rx_tchh_fn(): fix HR SID detection (wrong offset)

According to RFC5993, which is referenced by 3GPP TS 48.103, the complete RTP HR payload consists of a Table-of-Contents (ToC) byte followed by the 14 bytes of the HR codec frame. See section 5.2.

gsm0503_tch_hr_decode() outputs frames in the RTP format with length of 15 bytes (120 bits): 1 (ToC) + 14 (HR frame):

+-------------+------------------------- | ToC section | HR codec frame ... +-------------+-------------------------

osmo_hr_check_sid() expects a HR codec frame of 14 bytes (112 bits) as the input, so we should skip the ToC section when calling it.

Change-Id: Ie5fa776dcb2b2203a97aed56ecbf2450af7d87c1 Related: SYS#5853 --- M src/osmo-bts-trx/sched_lchan_tchh.c 1 file changed, 4 insertions(+), 2 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-bts refs/changes/30/27430/6