OsmocomBB MS-side GSM Protocol stack (L1, L2, L3) including firmware
https://osmocom.org/projects/baseband
Vadim Yanitskiy
15877ba051
There is a time window between activation of a dedicated channel and
receipt of a L1CTL_DATA_REQ with the first RR Measurement Report, in
which trxcon may need to start transmission on Uplink SACCH.
In this case trxcon is using a dummy SACCH block with hard-coded L1
SACCH header values and hard-coded Measurement Results. This mimics
behavior of the layer1 implementation in firmware for Calypso phones.
When running the mobile application, this error can be seen:
DAPP ERROR trxcon(0)[0x55ee57bee1a0]{FBSB_SEARCH}:
Event TRXCON_EV_RX_DATA_IND not permitted
which means that the mobile is sending L1CTL_DATA_REQ *before*
establishing a dedicated channel. And this message contains an
RR Measurement Report. The idea behind this is to populate the
SACCH cache in advance and thus avoid sending dummy values.
Let's allow the L2 apps populating SACCH cache before establishing
a dedicated connection using new TRXCON_EV_UPDATE_SACCH_CACHE_REQ.
Change-Id: I0f467fc07cf844cc73465f235b36ba7d00788c9f
Related: OS#5635, OS#5599
|
||
|---|---|---|
| contrib | ||
| doc | ||
| include | ||
| src | ||
| .gitignore | ||
| .gitreview | ||