OpenBSC October 2015

openbsc@lists.osmocom.org

17 participants
41 discussions

by mosbah abdelkader

> I don't understand. This callback will be called with data you need to write > to the network. In case of MTP Level3 you will need to wrap that around the > msgb you got. I means: is the interaction with mtp3 layer implemented (is sending sccp data by mtp3 implemented by the library?)? Also, what about the reception of data from mtp3 layer. is that implemented in the sccp lib. I am asking these questions because I see the code of mtp3 in the lib but no significant call is present in the sccp part of the lib. Thank you for your help.

1 month

Half sided calls

by Sipos Csaba

Dear List, I am in the process of creating the Wiki page for Ettus B200/B210 with OpenBSC, GPRS and Asterisk. I am quite close, both data and calls are working, but the voice calls are half sided. The downlink direction works, but the uplink does not. I tried without Asterisk and LCR (between two phones) and still the calls are half sided. In the mean time I got these messages in the Osmo-BTS log: <0006> scheduler.c:276 PH-DATA.req: chan_nr=0x0a link_id=0x00 fn=1284768 ts=2 tr x=0 <0006> scheduler.c:1036 TCH/F has not been served !! No prim for trx=0 ts=1 at f n=1284764 to transmit. <0006> scheduler.c:1036 TCH/F has not been served !! No prim for trx=0 ts=2 at f n=1284764 to transmit. <0006> scheduler.c:379 TCH RTS.ind: chan=TCH/F chan_nr=0x09 fn=1284772 ts=1 trx= 0 <0006> scheduler.c:276 PH-DATA.req: chan_nr=0x09 link_id=0x00 fn=1284772 ts=1 tr x=0 <0006> scheduler.c:379 TCH RTS.ind: chan=TCH/F chan_nr=0x0a fn=1284772 ts=2 trx= 0 <0006> scheduler.c:276 PH-DATA.req: chan_nr=0x0a link_id=0x00 fn=1284772 ts=2 tr x=0 <0006> scheduler.c:1036 TCH/F has not been served !! No prim for trx=0 ts=1 at f n=1284768 to transmit. <0006> scheduler.c:1036 TCH/F has not been served !! No prim for trx=0 ts=2 at f n=1284768 to transmit. SMS and GPRS seems to be fine. If someone have any idea, I would love to hear it. :-) Thanks! Csaba

9 years, 1 month

[PATCH 0/4] core/conv: Fast Viterbi decoding

by Thomas Tsou

Hi all, This patch set adds to libosmocore an optimized Viterbi decodeer for architecture specific (Intel SSE) and non-specific cases. The implementation covers codes with constraint lengths of K=5 and K=7 and rates 1/4 to 3/4, which make up the majority of GSM use cases. Speedup from the current implementation is in the range of 5 to 20 depending on the processor and code type. API is unchanged. Tested on Haswell (i7-4770K) and Atom (D2550). Additional test codes from osmo-bts are included. Further tests for AWGN bit-error-rate and benchmarks can be found in the following repository. https://github.com/ttsou/osmo-conv-test Here are some examples. Bit error test for GPRS CS2 with SNR of 5 dB and 100000 bursts. $ ./conv_test -c 2 -e -r 5 -i 100000 ================================================= [+] Testing: GPRS CS2 [.] Specs: (N=2, K=5, non-recursive, flushed, not punctured) [.] Input length : ret = 290 exp = 290 -> OK [.] Output length : ret = 588 exp = 588 -> OK [.] BER tests: [..] Testing base: [..] Input BER.......................... 0.042443 [..] Output BER......................... 0.000006 [..] Output FER......................... 0.001350 (135) [..] Testing SIMD: [..] Input BER.......................... 0.042460 [..] Output BER......................... 0.000005 [..] Output FER......................... 0.001240 (124) Timed AFS benchmark with 8 threads and 100000 bursts per thread. $ ./conv_test -b -c 10 -j 8 -i 100000 ================================================= [+] Testing: GSM TCH/AFS 6.7 [.] Specs: (N=4, K=5, recursive, flushed, punctured) [.] Input length : ret = 140 exp = 140 -> OK [.] Output length : ret = 448 exp = 448 -> OK [.] Performance benchmark: [..] Encoding / Decoding 800000 bursts on 8 thread(s): [..] Testing base: [..] Elapsed time....................... 4.320001 secs [..] Rate............................... 25.925920 Mbps [..] Testing SIMD: [..] Elapsed time....................... 0.458272 secs [..] Rate............................... 244.396341 Mbps [..] Speedup............................ 9.426718 -TT

9 years, 2 months

Meas_web and meas_json

by Sipos Csaba

Hi Alexander, Just wanted to thank you for the web version of meas_vis utility, and wanted to confirm that it works very well with Nokia Site family (E1 based) and the USRP B200 too :-) If someone missed it, the web version can be found here: https://github.com/fairwaves/meas_web It would make life easier if the meas_json utility would make it to the master branch: http://cgit.osmocom.org/openbsc/log/?h=achemeris/meas_json Is there a reason it is not being merged? Regards, Csaba

9 years, 6 months

[PATCH 1/3] mncc: Implement helper functions to convert MNCC cause to a string.

by Alexander Chemeris

This is the first patch of the series. The first two patches are improvements of the log output and are independent of the 3rd patch in terms of code - proposed logging improvements just make it easier to debug issues with MNCC cause codes. The code is also a part of the achemeris/mncc_cause_fixes_master branch. -- Regards, Alexander Chemeris. CEO, Fairwaves, Inc. https://fairwaves.co

9 years, 7 months

[PATCH 3/3] mncc: Send "Dest OOO" cause in case of a link radio failure.

by Alexander Chemeris

Previously we were sending a generic "Resource unavailable" cause code making it impossible to distinguish real error cases from a regular radio link failure. This was the reason for many "unknown" call errors we've seen at Rhizomatica installations. Now they are properly classified as non-erroneous call failures. The code is also a part of the achemeris/mncc_cause_fixes_master branch. -- Regards, Alexander Chemeris. CEO, Fairwaves, Inc. https://fairwaves.co

9 years, 7 months

[PATCH 2/3] mncc: Log CC cause when sending a primitive to MNCC.

by Alexander Chemeris

The code is also a part of the achemeris/mncc_cause_fixes_master branch. -- Regards, Alexander Chemeris. CEO, Fairwaves, Inc. https://fairwaves.co

9 years, 7 months

EGPRS(EDGE) data rate is not stable?

by wangpalm

With phone attached to my configured EGPRS, sometimes it has a data rate around 200kbps (which is near optimal), while frequently it has a intolerablly slow data rate. Is it a common problem, or it's due to incorrect configrations or hardware problems? I run a gsm test system with nanobts, and the libosmocore, openbsc, openggsn codes are based on the version around end of April 2015. The configuration is made accorrding to the instruction from openbsc web. The correction in fc_queue_timer_cfg has also been made according to Jacob Erlbeck.

9 years, 7 months

[PATCH 0/6] gtp: compat and build updates

by Andreas Schultz

Hi, This is the first series of my gtp kernel updates. It contains mostly the removal of Linux version ifdefs. After this the module builds only on 4.3+. The goal here is the preparation for main line inclusion. The other small change is a update to the Makefile for simpler out-of-tree build Andreas -- Andreas Schultz (6): build: update Makefile for simpler out of tree builds gtp: remove genl_ops compat ifdef for Linux < 3.13 gtp: remove per cpu stats compat ifdef for Linux < 3.13 gtp: update for Linux > 4.1+, __ip_select_ident arguments have changed gtp: update for Linux > 4.1+, genlmsg_end return should be ignored gtp: update for Linux > 4.2+, set NO_QUEUE flag on gtp device Makefile | 17 ++++++++++++----- gtp.c | 11 +++++------ gtp.h | 4 ---- 3 files changed, 17 insertions(+), 15 deletions(-) -- 2.5.0

9 years, 7 months

OAP patch set fixes

by Neels Hofmeyr

Here is the fixed OAP patch set of those changes not merged yet. For decode_big_endian(), see the new API comment and my mail from thursday night/friday morning. Thanks for the review! ~Neels

9 years, 7 months

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OpenBSC October 2015