osmo-bts.git branch neels/dyn_no_pcu updated. 0.4.0-265-g7ea38df

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The branch, neels/dyn_no_pcu has been updated
  discards  42edba5fe67ac96d4dde6ebb5f5d84fea9124f4f (commit)
  discards  370a91c4eac99948376c2175ef9e352c70be2b53 (commit)
       via  7ea38df5378309a5eb831125dbebbec34aab107e (commit)
       via  bf6bae2b2363a182bb1b95574c2922bf4257c4d9 (commit)
       via  8a148613b4c93f5a25dd2a2d9929de75882adbc5 (commit)
       via  4dfc3da96bbad9e6a8641233c87a05a46af7d906 (commit)
       via  9faaf4ecf01322189808901398e06d7e4f14560d (commit)
       via  3b2e5de3aea8652969e7bbd1e3c04206dce51330 (commit)
       via  988f634c97d070840f4ffc952f6bac32d967859b (commit)
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- Log -----------------------------------------------------------------
http://cgit.osmocom.org/osmo-bts/commit/?id=7ea38df5378309a5eb831125dbebbec34aab107e

commit 7ea38df5378309a5eb831125dbebbec34aab107e
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date:   Mon Aug 22 23:07:09 2016 +0200

    dyn TS: if PCU is not connected, allow operation as TCH
    
    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

-----------------------------------------------------------------------

Summary of changes:
 include/osmo-bts/gsm_data.h     |  1 +
 include/osmo-bts/pcu_if.h       |  3 ++-
 include/osmo-bts/pcuif_proto.h  |  6 ++++--
 src/common/l1sap.c              | 30 +++++++++++-------------------
 src/common/lchan.c              | 16 ++++++++++++++++
 src/common/measurement.c        | 16 +---------------
 src/common/pcu_sock.c           |  5 ++++-
 src/osmo-bts-litecell15/l1_if.c |  2 +-
 src/osmo-bts-litecell15/oml.c   | 27 +++++++++++++++++++--------
 src/osmo-bts-sysmo/l1_if.c      |  8 +++++++-
 src/osmo-bts-sysmo/oml.c        | 27 +++++++++++++++++++--------
 11 files changed, 85 insertions(+), 56 deletions(-)


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