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Osmocom's Base Station Controller for 2G mobile networks https://osmocom.org/projects/osmobsc
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Neels Hofmeyr 31716f981a hodec2 log: less verbose, more concise logging 
Drop numerous log statements that merely bloat the ho decision log.

Logging HO candidates: log more compact in a single line, do not use LOGPC and
multiline output. The result is more useful information in a quarter of the log
lines.

LOGPHOLCHAN(), LOGPHOLCHANTOBTS():
- log lchan->type instead of lchan->ts->pchan
- always log the speech mode

===== Before =====

DHODEC handover_decision_2.c:1131 (lchan 0.010 TCH/F) (subscr IMSI:000001) MEASUREMENT REPORT (1 neighbors)
DHODEC handover_decision_2.c:1136 (lchan 0.010 TCH/F) (subscr IMSI:000001)   0: arfcn=871 bsic=63 neigh_idx=0 rxlev=30 flags=0
DHODEC handover_decision_2.c:261 (lchan 0.010 TCH/F) (subscr IMSI:000001) neigh 871 rxlev=30 last_seen_nr=3
DHODEC handover_decision_2.c:1158 (lchan 0.010 TCH/F) (subscr IMSI:000001) HODEC2: evaluating measurement report
DHODEC handover_decision_2.c:1175 (lchan 0.010 TCH/F) (subscr IMSI:000001) Measurement report: average RX level = -110
DHODEC handover_decision_2.c:1190 (lchan 0.010 TCH/F) (subscr IMSI:000001) Virtually improving RX level from -110 to -105, due to AFS bias
DHODEC handover_decision_2.c:1220 (lchan 0.010 TCH/F) (subscr IMSI:000001) Attempting handover/assignment due to low rxlev
DHODEC handover_decision_2.c:899 (lchan 0.010 TCH/F) (subscr IMSI:000001) Collecting candidates for Assignment and Handover
DHODEC handover_decision_2.c:407 (lchan 0.010 TCH/F)->(BTS 0) (subscr IMSI:000001) tch_mode='SPEECH_AMR' type='TCH_F'
DHODEC handover_decision_2.c:313 (lchan 0.010 TCH/F) (subscr IMSI:000001) FR3 supported
DHODEC handover_decision_2.c:313 (lchan 0.010 TCH/F) (subscr IMSI:000001) HR3 supported
DHODEC handover_decision_2.c:489 (lchan 0.010 TCH/F)->(BTS 0) (subscr IMSI:000001) removing TCH/F, already on TCH/F in this cell
DHODEC handover_decision_2.c:573 (lchan 0.010 TCH/F)->(BTS 0) (subscr IMSI:000001) TCH/H would not be congested after HO
DHODEC handover_decision_2.c:605 (lchan 0.010 TCH/F)->(BTS 0) (subscr IMSI:000001) TCH/H would not be less congested in target than source cell after HO
DHODEC handover_decision_2.c:609 (lchan 0.010 TCH/F)->(BTS 0) (subscr IMSI:000001) requirements=0x30
DHODEC handover_decision_2.c:704  - current BTS 0, RX level -110
DHODEC handover_decision_2.c:707    o free TCH/F slots 3, minimum required 0
DHODEC handover_decision_2.c:709    o free TCH/H slots 4, minimum required 0
DHODEC handover_decision_2.c:714    o no requirement fulfilled for TCHF (no assignment possible)
DHODEC handover_decision_2.c:737    o requirement A B fulfilled for TCHH (not congested after assignment)
DHODEC handover_decision_2.c:407 (lchan 0.010 TCH/F)->(BTS 1) (subscr IMSI:000001) tch_mode='SPEECH_AMR' type='TCH_F'
DHODEC handover_decision_2.c:313 (lchan 0.010 TCH/F) (subscr IMSI:000001) FR3 supported
DHODEC handover_decision_2.c:313 (lchan 0.010 TCH/F) (subscr IMSI:000001) HR3 supported
DHODEC handover_decision_2.c:563 (lchan 0.010 TCH/F)->(BTS 1) (subscr IMSI:000001) TCH/F would not be congested after HO
DHODEC handover_decision_2.c:573 (lchan 0.010 TCH/F)->(BTS 1) (subscr IMSI:000001) TCH/H would not be congested after HO
DHODEC handover_decision_2.c:595 (lchan 0.010 TCH/F)->(BTS 1) (subscr IMSI:000001) TCH/F would not be less congested in target than source cell after HO
DHODEC handover_decision_2.c:605 (lchan 0.010 TCH/F)->(BTS 1) (subscr IMSI:000001) TCH/H would not be less congested in target than source cell after HO
DHODEC handover_decision_2.c:609 (lchan 0.010 TCH/F)->(BTS 1) (subscr IMSI:000001) requirements=0x33
DHODEC handover_decision_2.c:701  - neighbor BTS 1, RX level -110 -> -80
DHODEC handover_decision_2.c:707    o free TCH/F slots 4, minimum required 0
DHODEC handover_decision_2.c:709    o free TCH/H slots 4, minimum required 0
DHODEC handover_decision_2.c:712    o requirement A B fulfilled for TCHF (not congested after handover)
DHODEC handover_decision_2.c:737    o requirement A B fulfilled for TCHH (not congested after handover)
DHODEC handover_decision_2.c:914 (lchan 0.010 TCH/F) (subscr IMSI:000001) adding 2 candidates from 1 neighbors, total 2
DHODEC handover_decision_2.c:1020 (lchan 0.010 TCH/F)->(BTS 1) (subscr IMSI:000001) Best candidate, RX level -80
DHODEC handover_decision_2.c:625 (lchan 0.010 TCH/F)->(BTS 1) (subscr IMSI:000001) Triggering Handover
DHODEC handover_decision_2.c:688 (lchan 0.010 TCH/F)->(BTS 1) (subscr IMSI:000001) Triggering handover to TCH/F, due to low rxlevel
DHO handover_logic.c:133 (BTS 0 trx 0 ts 1 lchan 0 TCH/F)->(BTS 1 lchan TCH_F) Initiating Handover...
DMSC handover_logic.c:135 SUBSCR_CONN[0x612000000520]{ACTIVE}: Received Event HO_START
DHODEC handover_logic.c:172 (BTS 0 trx 0 arfcn 870 ts 1 lchan 0 TCH/F)->(BTS 1 trx 0 arfcn 871 ts 1 lchan 0 TCH/F) (subscr IMSI:000001) Triggering Handover

===== After =====

DHODEC handover_decision_2.c:1039 (lchan 0.010 TCH_F SPEECH_AMR) (subscr IMSI:000001) MEASUREMENT REPORT (1 neighbors)
DHODEC handover_decision_2.c:1044 (lchan 0.010 TCH_F SPEECH_AMR) (subscr IMSI:000001)   0: arfcn=871 bsic=63 neigh_idx=0 rxlev=30 flags=0
DHODEC handover_decision_2.c:1097 (lchan 0.010 TCH_F SPEECH_AMR) (subscr IMSI:000001) Avg RX level = -110 dBm, +5 dBm AFS bias = -105 dBm; Avg RX quality = -1 (invalid), +0 AFS bias = -1
DHODEC handover_decision_2.c:1122 (lchan 0.010 TCH_F SPEECH_AMR) (subscr IMSI:000001) RX level is TOO LOW: -105 < -100
DHODEC handover_decision_2.c:677 (lchan 0.010 TCH_F SPEECH_AMR)->(BTS 0) (subscr IMSI:000001) RX level -110; TCH/F={free 3 (want 0), [-] not a candidate}; TCH/H={free 4 (want 0), [ABC] good}
DHODEC handover_decision_2.c:671 (lchan 0.010 TCH_F SPEECH_AMR)->(BTS 1) (subscr IMSI:000001) RX level -110 -> -80; TCH/F={free 4 (want 0), [ABC] good}; TCH/H={free 4 (want 0), [ABC] good}
DHODEC handover_decision_2.c:928 (lchan 0.010 TCH_F SPEECH_AMR)->(BTS 1) (subscr IMSI:000001) Best candidate, RX level -80
DHODEC handover_decision_2.c:641 (lchan 0.010 TCH_F SPEECH_AMR)->(BTS 1) (subscr IMSI:000001) Triggering handover to TCH/F, due to low rxlevel
DMSC handover_logic.c:125 SUBSCR_CONN[0x612000000520]{ACTIVE}: Received Event HO_START
DHODEC handover_logic.c:169 (BTS 0 trx 0 arfcn 870 ts 1 lchan 0 TCH_F SPEECH_AMR)->(BTS 1 trx 0 arfcn 871 ts 1 lchan 0 TCH/F) (subscr IMSI:000001) Triggering Handover

Change-Id: If1add9b57a051d32b67a4a08ab47a9655aa9dd17
 		2018-07-23 01:29:23 +02:00
contrib contrib: osmo-bsc.service: Fix osmo-mgw.service dependency 2018-03-23 15:44:19 +00:00
debian debian: Move meas related binaries into new package osmo-bsc-meas-utils 2018-06-25 19:22:16 +00:00
doc doc: charts: illustrate new plan for ts and lchans 2018-06-08 16:16:42 +00:00
include hodec2 log: less verbose, more concise logging 2018-07-23 01:29:23 +02:00
m4 move openbsc/* to repos root 2017-08-27 03:52:43 +02:00
src hodec2 log: less verbose, more concise logging 2018-07-23 01:29:23 +02:00
tests codec_pref: check bts codec support 2018-07-22 06:16:11 +00:00
.gitignore update.gitignore with 'tags' files and 'deps' directory 2018-01-28 03:23:07 +01:00
.gitreview .gitreview: update repo url to new location 2017-08-08 17:24:04 +02:00
.mailmap add .mailmap file for mapping git author name/mail in shortlog 2016-08-08 17:40:28 +00:00
AUTHORS move openbsc/* to repos root 2017-08-27 03:52:43 +02:00
COPYING move openbsc/* to repos root 2017-08-27 03:52:43 +02:00
Makefile.am Remove unneeded .py scripts 2017-12-19 18:08:46 +01:00
README rewrite README 2017-09-06 16:25:09 +02:00
README.vty-tests Remove obsolete ./configure option 2018-01-02 12:53:11 +01:00
configure.ac codec_pref: move match_codec_pref() to separate c-file and add unit-test 2018-07-22 06:16:11 +00:00
git-version-gen git-version-gen: look for .git in ./, not ../ 2017-08-27 03:52:43 +02:00
osmoappdesc.py remove traces of osmo-bsc_nat in python test (osmoappdesc/test_runner) 2018-06-10 22:13:47 +02:00

README 

About OsmoBSC
=============

OsmoBSC originated from the OpenBSC project, which started as a minimalistic
all-in-one implementation of the GSM Network. In 2017, OpenBSC had reached
maturity and diversity (including M3UA SIGTRAN and 3G support in the form of
IuCS and IuPS interfaces) that naturally lead to a separation of the all-in-one
approach to fully independent separate programs as in typical GSM networks.

OsmoBSC was one of the parts split off from the old openbsc.git. Before, it
worked as a standalone osmo-bsc binary as well as a combination of libbsc and
libmsc, i.e. the old OsmoNITB. Since the standalone OsmoMSC with a true A
interface (and IuCS for 3G support) is available, OsmoBSC exists only as a
separate standalone entity.

OsmoBSC exposes
- A over IP towards an MSC (e.g. OsmoMSC);
- Abis interfaces towards various kinds of BTS;
- The Osmocom typical telnet VTY and CTRL interfaces.

Find OsmoBSC issue tracker and wiki online at
https://osmocom.org/projects/osmobsc
https://osmocom.org/projects/osmobsc/wiki

OsmoBSC-NAT is a specialized solution to navigating RTP streams through a NAT.
(Todo: describe in more detail)