| Age | Commit message (Collapse) | Author | Files | Lines |
|---|
|
sysmocom-bts model shuts down on link loss, but other models may not want
this, so shutdown is moved tor bts_model_abis_close of osmo-bts-sysmo.
|
|
|
|
|
|
The code is quite complete, TCH and PDCH channels are not yet tested.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
MS uplink power control is required in pretty much any BTS, and we
cannot assume that they PHY / L1 will always take care of it by
itself. So the correspondign code is moved to common/power_control.c
and called from the generic part of L1SAP.
The corresponding VTY paramter has been moved from the sysmobts-specific
trx VTY node to the common BTS VTY node.
|
|
|
|
|
|
|
|
|
|
|
|
There are three transitions:
1. LCHAN_CIPH_NONE -> LCHAN_CIPH_RX_REQ -> LCHAN_CIPH_RX_CONF
It is used to enable ciphering in RX (uplink) direction only.
2. LCHAN_CIPH_RX_CONF -> LCHAN_CIPH_RX_CONF_TX_REQ -> LCHAN_CIPH_RXTX_CONF
It is used to additionally enable ciphering in TX (downlink) direction.
3. LCHAN_CIPH_NONE -> LCHAN_CIPH_RXTX_REQ -> LCHAN_CIPH_RX_CONF_TX_REQ
-> LCHAN_CIPH_RXTX_CONF
It is used to enable ciphering in both TX and RX directions. This is used
when the channel is activated with encryption already enabled. (assignment
or handover)
In order to follow the order of these transitions, the RX direction must
always be set before the TX direction.
If no cipher key is set (A5/0), ciphering is set to ALG 0, but lchan cipher
state remains at LCHAN_CIPH_NONE.
|
|
This part moves processing of measurement infos from osmo-bts-sysmo to
common part.
|
|
... introduced in 2cc37035d73191b71b9ba9c0d559a0da6a5f35e5
|
|
|
|
This part moves control channel message primitives from osmo-bts-sysmo to
common part.
In order to control ciphering fo BTS model, CIPHER (MPH_INFO) messages are
used.
|
|
|
|
|
|
This part moves TCH handling from osmo-bts-sysmo to common part. The RTP
handling is done at the common part, so they can be used by other BTS
models.
|
|
|
|
This part replaces channel activation/deactivation/modification routines
by MPH_INFO messages.
|
|
|
|
The original code handled both the fact where a TIME indication would be
missed (and thus the frame number be higher than previous + 1), as well
as the two cases for combined / non-combined CCCH.
The L1SAP code removed some of those bits, which I'm re-introducing
here.
|
|
This part moves GSM time handling from osmo-bts-sysmo part to common part.
|
|
|
|
This part moves PDTCH, PACCH and PTCCH message primitives from
osmo-bts-sysmo to common part.
|
|
This is a regression of the code compared to the existing
sysmoBTS code, where the L1 tells us whether its AGCH or
PCH. However, it was not used even in the old code, so
we can afford to simply put a #warning here.
|
|
This part moves PCH and AGCH message primitives from osmo-bts-sysmo to
common part.
|
|
|
|
In case of a RACH INDICATION on CCCH, we need to set CHAN_NR to
0x88 (RSL_CHAN_RACH). In other cases, chan_nr needs to reflect
the actual logical channel (TCH/SDCCH) on whcih the handover happened.
|
|
I don't understand why we would detect handover only on TRX1-n,
but not on TRX0. It is perfectly valid for a handover to occur
on TRX0.
|
|
|
|
|
|
|
|
This part moves RACH message primitives from osmo-bts-sysmo to common
part.
|
|
... in an effort to avoid introducing new/more spaghetti code
Also, use offsetof() instead of pointer calculation to determine
the start of GsmL1_Prim_t.u.phDataReq.msgUnitParam.u8Buffer
|
|
This first part moves BCCH message primitives from osmo-bts-sysmo to common
part. A new file "common/l1sap.c" is introduced to implement handling of
layer 1 messages from/to BTS model.
|
|
Spotted by Ciaby while debugging an audio issue. Do not
send anything to port==0 to the BSC/NITB. Look at the
upper bits of the speech_mode to determine if sending is
allowed. 0x1 means recv_only and all other modes allow us
to send.
Manually verified with a single phone call with LCR bridge
mode to send a CRCX early but a MDCX sendrecv later. The
audio starts to flow after the MDCX message. Virtual Addr
space didn't increase over 10 calls. The l1p_msg is freed
by the caller.
The code might not re-set speech_mode from one call to
another but if it is ever != 0 it can be expected that
the BSC will always set it. This is because we do not
(and don't want to) allocate the lchan dynamically on
every usage.
Fixes: SYS#2111
|
|
Use the new libosmo-abis API to query the session for the
statistics and then send it as a TLV element to the BSC.
This can be used to do post processing about the call. E.g
to figure out if no audio arrived at all.
|
|
I have traces that include the connection identifier in the
DLCX indication.
|
|
|
|
The RSL_IE_MEAS_RES_NR is mandatory element with a minimum
of 5 octets (two for TL and three for the value). When we
establish a new channel we might not have had enough time
in a TDMA frame to calculate the average. The issue is not
easy to reproduce. At the point we receive the measurement
report we have two uplink measurements queued. As it is not
easy to reproduce and only occurs when a channel is new
I have decided to drop the message instead of sending made
up uplink measurement reports.
As of now lchan_build_rsl_ul_meas will always return 3 and
the condition will never be false.
Avoids: SYS#1781
|
|
The write_queue is designed to have a maximum amount of pending
messages and will refuse to take new messages when it has been
reached. The caller can decide if it wants to flush the queue
and add the message again, create a log. But in all cases the
ownership of the msgb has not been transferred. Fix the potential
memory leak in the failure situation.
|
|
Instead of handling primitives directly at layer 1 specific code,
osmo-bts handles primitives at common code.
When all primitive are moved, the l1sap interface will:
- receive PH-DATA indications and forward them to layer 2.
- check for RF link loss and notify BSC.
- receive TCH indications and forward them via RTP.
- receive PH-RTS indications and send PH-DATA requests with content
according to its logical channel.
- receive TCH-RTS indications and send TCH requests with content
received via RTP or loopback from TCH indications.
- send MPH-INFO requests to activate, deactivate and modify logical
channels and handle their confirms.
- receive MPH-INFO indications with measurements from tranceiver.
- forward received and transmitted PH-DATA to GSMTAP.
|
|
In case of a headroom in a message, the 'head' pointer will not point to
the actual data.
|
