Move code from tch.c (lc15, sysmo) into generic function which:
- check if talkspurt is happening
- cache SID if necessary or invalidate cache
- fill in CMR & CMI prefix
This also fixes the problem when SID FIRST was cached without sending
just like SID UPDATE instead of being sent right away.
Change-Id: I6c7016a54749abadeef4fd4f5b6f750b256fb916
* consolidate AMR CMR and CMI handling in common/amr.c
* use it in save_last_sid()
* remove dead code
* properly compute RTP payload length for AMR
* use save_last_sid() for FR & HR as well
* invalidate cached SID if SPEECH frame is received
Fixes: OS #1800, #1801
Change-Id: I5a1c1ad0b0a295a50e67775a4db85f1d331755ed
Note: this also require changes to properly link against libosmocodec -
see 2bb65be159dfdabf664fec569b343320301701b0 in libosmocore.
Change-Id: I96594cf3aa1013d505bd20069d5bf261d9a2aefb
If Marker bit is set than it's a talkspurt which we have to explicitly
indicate to L1 by first sending ONSET message and than actual voice
data in a separate message.
This change affect sysmobts and LC15 hw.
Change-Id: I88c41568bcb0d82699f617adc4ad192603dd1bb6
Related: OS#1750
Previously SID retransmission was scheduled incorrectly based on GSM
frames instead of voice frames. Fix this by using GSM Fn only as elapsed
time estimation:
* move saved SID retransmission into generic function from lc15 and sysmo
specific code
* split retransmission time check into separate generic function
* compute estimation for elapsed time since last retransmission using
GSM Fn
Change-Id: Ib054b458a7345d9ba40dba53754ca59ab099c8e8
Fixes: OS#1799
Like most other osmo-* programs, bind the telnet VTY to the address specified
by the 'line vty'/'bind' command. This is added by vty_init(), so until now the
BTS offered this config but ignored it.
Change-Id: Ic4ab32aee08d8a779adeb9943892de0c828c7b3d
Add log_name to lchan_lookup() and pass such from the various RSL rx events
that call it to validate the RSL chan_nr.
Change-Id: I0d9923f47ac655b204169eec302d607412d5754d
Before this patch, Osmocom style TCH/F_TCH/H_PDCH dyn TS were paralyzed if no
PCU was running. The state of the dyn TS would lock up in the PDCH activation
phase since the PCU never completed the process.
Make more robust, i.e. don't concern the BSC with PDCH activation failures.
This matches the way plain PDCH TS work: besides declaring the TS as PDCH, the
BSC is not involved and is not told about errors.
During PDCH deactivation, still wait for the PCU to tear down the PDTCH SAPIs,
but in case no PCU is connected, send a rel ack right away.
Thus, the BSC will happily switch Osmocom style dynamic timeslots to and from
PDCH mode, using the dyn TS as voice channels as needed, and not caring about
possible PDCH failures. GPRS starts working right away as soon as a PCU
connects, regardless of dyn TS having been used for voice any number of times,
and without another switchover needed.
In detail:
In rsl_rx_chan_activ(), upon receiving a PDCH activation, send an RSL chan act
ack right away, unconditionally (with an explaining comment). Do not concern
the Abis link with PDCH activation failures.
Since we're acking right away now, drop the chan act ack that would follow
after the PCU activation: as before dyn TS, only send acks and nacks for
rel_act_kind == LCHAN_REL_ACT_RSL (PDCH runs as LCHAN_REL_ACT_PCU).
In dyn_ts_pdch_release, indicate that the PCU is not connected by means of
returning 1. In rsl_rx_rf_chan_rel(), use this indicator to send a rel ack
right away if the PCU is not connected.
Change-Id: I2a0b9730197786b99ff3bc1f08c75f7d279cb1f7
Prepare for a dyn TS patch that needs to call rsl_tx_chan_act_ack() directly
without the rel_act_kind decision.
Add function rsl_tx_chan_act_acknack() to wrap rsl_tx_chan_act_ack() and
rsl_tx_chan_act_nack(). Move the decision whether to drop the ack/nack, based
on lchan->rel_act_kind, to the new function, losing some code dup.
Change all callers to use the new function; drop the two older ones from rsl.h
and make them static.
Note: for nack, the exception for dyn TS in PDCH mode was missing
(rsl_tx_chan_act_nack() had only the rel_act_kind != LCHAN_REL_ACT_RSL
condition, but should also have had the dyn TS exception as in
rsl_tx_chan_act_ack()). I already know that this exception will again be
removed in an upcoming commit, but for patch readability it logically makes
sense to add it here. To easily include the nack case, drop the check for which
pchan the dyn TS is operating as, because a rel_act_kind == LCHAN_REL_ACT_PCU
implies that it is either already in or trying to become PDCH mode.
Change-Id: I57ba60c670730c6d7877a6a9b96ece0a7679a0bb
Have one common ts_is_pdch(), placed in lchan.c, since this file is pretty
empty and pretty close to ts. Publish in gsm_data.h.
Remove the if-style implementation from l1sap.c, and instead implement in a
switch statement.
This prepares for upcoming ts_is_pdch() usage in ph_data_req() for sysmo and
lc15.
Change-Id: Ib78d663fdbac5a1d7053f1b9d543649b66da00e2
In measurement.c, fix the number of sublots for TCH/F_TCH/H_PDCH, by using
ts_subslots() from gsm_data_shared.c. The local dup of subslots_per_pchan[] is
no longer needed. (depends on recent commit to openbsc.git for ts_sublots())
Change-Id: I9d9df470c49487bffd56dde42c7bec0da2f50642
Interface structure between osmo-bts and osmo-pcu is updated with the
parameters to differentiate the type of RACH and further support 11 bit
RACH. The function prototype and definitions are changed accordingly.
Interface version number is increased.
Change-Id: I4f4c501b2d86d77c78de32a84b1804172ffb6f4d
Apply similar fixes as for TCH/F_PDCH also for TCH/F_TCH/H_PDCH:
Detect dyn TS in PDCH mode in ts_is_pdch().
In trx_set_ts(), enhance the "if (TCH_F_PDCH)" to a switch statement including
both dynamic channel types. Adjust the comment to include both kinds.
Change-Id: I6669739cd08780cd9ffb9451cdae9f6b9704c4fe
Fill in values for BER, BTO, Link quality in L1SAP and send them to
PCU. Note: this increases the version of BTS <-> PCU protocol. It also
requires corresponding changes in libosmocore.
All BTS models provide measurements data unless direct DSP access for
PCU is enabled. For BTS-specific notes see below.
Octphy: conversion from sSNRDb to Link Quality uses formulae which works
in practice instead of what's documented for sSNRDb value. Subject to
change in future revisions.
TRX: C / I link quality estimator is not computed.
Change-Id: Ic9693a044756fb1c7bd2ff3cfa0db042c3c4e01c
Related: OS#1616
In l1sap_ph_rts_ind(), l1sap_ph_data_ind() and to_gsmtap(), the decision
to handle a TS as PDCH was still missing for dynamic TS.
It is not yet clear why this did not impact functionality for dynamic timeslots
on other BTS models. AFAICT they should not work without this patch, but in
fact they do. It would be nice to clarify this some day.
Change-Id: I7b873a089a3de70d980885a7539cb91997464743
Since the osmo_unixsock_listen() was moved to libosmocore
it would be better to use the library's implementation
instead of reinventing the wheel again.
Change-Id: Id5828649d44ef11e70946793696b0d689d6b35e3
Existing interfaces are coded with the implicit expectation of using
a burst sequence length of 148, which is constant with GSM and GPRS.
That changes with EGPRS, where the burst length may be 444 due to
the use of 8-PSK instead of GMSK modulation.
Setup the interface to accept and return a length value with the
burst sequence. This allows 444 length bit vectors to/from the
EGPRS decoder/encoder. Length is explicitly used as a identifier for
8-PSK vs. GMSK modulated sequences.
Change-Id: I90b46b46b11b6ce280e7f8232d5a2fccec2d4f18
Signed-off-by: Tom Tsou <tom.tsou@ettus.com>
common/l1sap: For dyn TS, the BSC will issue RSL Chan Activ requests with a
non-standard chan_nr. While the rest of the code now understands that, the L1
phy will not. Translate to standard PDCH (== TCH/F).
common/oml: use dyn TS' current pchan mode for lchans config.
common/pcu_sock: detect desired PDCH mode of dyn TS.
common/rsl: implement reconnection chain of a TS for changing its pchan:
* rsl_rx_chan_activ():
** Add dyn_pchan_from_chan_nr() to derive the requested pchan from the RSL
chan_nr IE.
** Notice the need for a pchan change and invoke dyn_ts_l1_reconnect() (s.b.)
** Make Chan Mode IE presence optional, because the non-standard PDCH
activation message is simpler and does not require it.
** Do PDCH activation via PCU.
* Add dyn_ts_l1_reconnect(): store state and disconnect the L1 channel;
then wait for cb_ts_disconnected().
* Add osmo_dyn_ts_disconnected() to cb_ts_disconnected():
verify state and connect with the new pchan type; then wait for
cb_ts_connected().
* Add osmo_dyn_ts_connected() to cb_ts_connected(), which re-issues
the cached chan activation message from before disconnecting the L1 channel.
* Also send an rf chan rel/act ack for dyn TS upon PDCH de/act via PCU.
* Add dyn_ts_pdch_release(): on channel release of a dyn TS in PDCH mode,
release via the PCU. Call from rsl_rx_rd_chan_rel().
Change-Id: I463bb6b4e57674f091c3badba9257374961c52c7
lchan_lookup in openbsc abis_rsl.c and rsl_lchan_lookup() rsl.c are the
same code, except for the log context, which is only set in abis_rsl.c.
The common code was factored out to gsm_data_shared.c in openbsc.git.
Use the *rc return code argument to keep the logging part in the newly
introduced thin wrapper lchan_lookup() in common/rsl.c. This also removes code
dup for logging
The rsl_lchan_lookup() implementation is removed from osmo-bts, so a recent
openbsc is needed to build this.
Change-Id: Ibc469b75e31560271be8633d524366442d27e6fb
Includes EGPRS specific convolutional codes, interleaving tables
and functions, burst mappings, training sequences, and parity
checks from 3GPP TS 44.060 needed to handle MCS codings 1-9.
Change-Id: Ie270398dd7a72f282ba53e646853d8de1eabee93
Signed-off-by: Tom Tsou <tom.tsou@ettus.com>
Move the actual switch from static conf_lchans_for_pchan() into new 'public'
function conf_lchans_as_pchan(), adding an explicit pchan argument. This allows
passing a non-trivial pchan, for dynamic TS.
conf_lchans_as_pchan() now takes a pchan argument, so distinguish the naming
and drop the 'for_pchan' from conf_lchans_for_pchan(), which takes only a ts
argument.
Change-Id: I8e458501fff5503c243512aeb3469c12b1f2bbc4
We're about to introduce a new kind of dynamic channel, which will also use
parts of the ip.access mode dyn PDCH code paths. Make sure the general parts
have general names and mark ip.access specific parts as such.
Rename dyn_pdch_ts_[dis]connected() to cb_ts_[dis]connected().
Rename dyn_pdch_complete to ipacc_dyn_pdch_complete().
From cb_ts_[dis]connected(), factor out the current code into static
functions ipacc_dyn_pdch_[dis]connected() -- this will make sense once the
new dynamic kind is added to cb_ts_[dis]connected().
Change-Id: I7da5b7cb7b48572671f50e0dec97d9eec3083df1
Also remove related cruft: .gitignore, msc-README and adjust an in-code
comment that referenced dyn_pdch.msc.
Change-Id: Ie41a453bb5070c1f18793f646dc053a978f43fba
Abstract code for checking/setting lchan's UL SID flag and RTP Marker
into generic function and use it for LC15 and sysmoBTS.
Change-Id: Ica5392e92bab29164711163e7b01adb174272883
Related: OS#1750
The function would currently only be called in cases where one of the if
branches catches on, but for safety's and clarity's sake, don't ts_connect
using as_pchan if no reconnect is pending.
Change-Id: I52c34065254e902bb80662fc04540901b36cb4c3
React on IPAC PDCH ACT and DEACT messages and invoke the PCU and bts_model_ts_*
APIs to effect switchover. The dyn PDCH interaction is described in the comment
to rsl_rx_dyn_pdch(), the main entry point for PDCH switchover.
In case the bts_model_ts_* are not implemented (or return other errors),
reply with an IPAC PDCH ACT/DEACT NACK.
Add callbacks that mark steps in the PDCH switchover process,
dyn_pdch_ts_disconnected(), dyn_pdch_ts_connected() and dyn_pdch_complete().
Add hooks in l1sap.c on channel activation and release confirmation, to call
dyn PDCH callbacks.
BTS dyn PDCH implementations should invoke dyn_pdch_ts_disconnected() and
dyn_pdch_ts_connected() when bts_model_ts_disconnect() or
bts_model_ts_connect() are called, respectively. (upcoming for sysmoBTS)
Change-Id: Id2f5f77121a65d6c14eac127b3d4fb50e97a77ab
Introduce a static function to encapsulate the decision whether a TS is
used for PDCH. Depending on the ts->flags, handle a TCH/F_PDCH TS exactly like
a standard PDCH TS.
Change-Id: Ic72fd06ecc99609823efa3edcf773007cc514b5b
Before, only standard ABIS RSL message names were logged, add ip.access
specific ones.
The IPAC_PDCH_ACT and _DEACT msgs are received with an ABIS_RSL_MDISC_DED_CHAN
discriminator, and not with _MDISC_IPACCESS like the others. Thus rsl_rx_dchan()
should be able to log ip.access message types properly.
Change-Id: I9db6826b515bf565fc7ae24fc0760b60928cc89f
Max
Neels Hofmeyr