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4312 discussions

Separate RSL bootstrap to LAPD and BCCH+SACCH
by Sipos Csaba 20 Jan '25

20 Jan '25

Dear list, At the moment setting up the RSL lapd link and start its bootstrap (BCCH info and SACCH filling) is done in one go (as much as I can see). The issue with this is for the Nokia Site family: per spec. we should let the RSL lapd link to be initiated by the BTS and once that lapd link is up, the BTS sends a BTS_STATE_CHANGED message with "TRX, enabled" object id and object current state, and only after this we should start sending the BCCH info and SACCH filling (the "actual" bootstrap of the RSL). For this to work, we need the Object Identity and Object Current State attributes (which is a WIP atm), but somehow it should be possible to separate the RSL bootstrap to RSL lapd only and RSL bcch info + sacch filling. I am unaware if the above separation is possible with the current codebase, but if someone can shed some light on this, that would be appreciated. Adding the Object Identity and Object Current State will also allow us to detect the actual state changes of various BTS objects (mostly the TRX), and we can also use the BTS_CHA_ADM_STATE to actually lock/unlock TRXes, so we dont need to fake the 12.21 state anymore. Regards, Csaba

3 4

Looking for BS11 mounting plates
by Alexander Huemer 05 Jan '25

05 Jan '25

Hi! I am in possession of a pair of Siemens BS11 mounting plates and am looking for a second pair. A photo of the plates is attached. Since - I believe - most people who play with such basestations do not mount them to a wall or pole, my hope is that some unused ones are floating around somewhere. Thanks, -Alex^Wblackbit

2 4

issues about csfb
by Masumeh Sadat Tohidi 16 Dec '24

16 Dec '24

Hello. I have tested CSFB on several phones in different situations. Calls from 4G to 2G are always established, but calls from 2G to 4G and from 4G to 4G are not always successful (sometimes they connect, and sometimes they do not). For this test, the phone's location relative to my USRP antennas is fixed. It is noteworthy that I have set the 4G neighbor in Osmo-BSC, as well as the 2G ARFCN information in SIB7. I attched log file and pcap of osmo system. osmo system ip:192.168.75.192 srsran_4G ip:192.168.75.185 open5gs ip:192.168.75.181 I would be very grateful if anyone with experience in this field could help me.

2 1

ip config for osmobts and osmo trx
by Masumeh Sadat Tohidi 24 Nov '24

24 Nov '24

I have installed osmo-bts-trx and osmo-trx-uhd on one machine (IP: 192.168.75.174), and on another machine, I installed osmo-bsc, osmo-msc, and osmo-hlr (IP: 192.168.75.185). How should I set the IP addresses in their configuration files? in osmo-bts-trx: osmotrx ip local ? osmotrx ip remote ? oml remote-ip ? in osmo-trx-uhd bind-ip ? remote-ip ? Also in bsc what config should be change?

2 1

connect osmo-BTS-trx to any other commercial Network
by Masumeh Sadat Tohidi 24 Nov '24

24 Nov '24

Hi. Is It possible to connect osmo-BTS-trx to any other commercial BSC or MSC?

2 1

error on sgs connection
by Masumeh Sadat Tohidi 21 Nov '24

21 Nov '24

Hello. I have installed open5gs v2.6.6 on ubuntu 22.04 (192.168.75.181) with kamailio and volte config as in https://open5gs.org/open5gs/docs/tutorial/02-VoLTE-setup/. It work well. I have installed osmo on 192.168.75.185 and also it work well and call establised. but when I add sgs config in mme, It show this info: [mme] INFO: sgsap client() [192.168.75.185]:29118 (../src/mme/sgsap-sctp.c:55) [mme] INFO: VLR-SGs[192.168.75.185] connection refused!!! (../src/mme/mme-sm.c:717) In osmo-msc.cfg i add: sgs local-port 29118 local-ip 192.168.75.185 vlr-name vlr.msc001.mnc001.mcc001.3gppnetwork.org end and in mme.yaml: sgsap: addr: 192.168.75.185 map: tai: plmn_id: mcc: 001 mnc: 01 tac: 1 lai: plmn_id: mcc: 001 mnc: 01 lac: 1 @ mme.txt <https://github.com/user-attachments/files/17811895/mme.txt> This is the log when run osmomsc smo-msc -c /etc/osmocom/osmo-msc.cfg DMNCC NOTICE MNCC socket at /tmp/msc_mncc (mncc_sock.c:300) DLGLOBAL NOTICE Available via telnet 127.0.0.1 4254 (telnet_interface.c:88) DSMPP NOTICE SMPP at 0.0.0.0 2775 (smpp_smsc.c:989) DLCTRL NOTICE CTRL at 127.0.0.1 4255 (control_if.c:1024) DLGSUP NOTICE GSUP connecting to 127.0.0.1:4222 (gsup_client.c:74) DDB NOTICE Init database connection to 'sms.db' using SQLite3 lib version 3.37.2 (db.c:521) DLMGCP NOTICE MGW(mgw) MGCP client: using endpoint domain '@mgw <https://github.com/mgw>' (mgcp_client.c:932) DMSC NOTICE MGW pool with 1 pool members configured, (ignoring MGW configuration in VTY node 'msc'). (msc_main.c:596) DLSCCP NOTICE OsmoMSC-A-Iu: Using SS7 instance 0, pc:0.23.1 (sccp_user.c:566) DLSCCP NOTICE OsmoMSC-A-Iu: Creating AS instance (sccp_user.c:573) DLSCCP NOTICE OsmoMSC-A-Iu: Using AS instance as-clnt-OsmoMSC-A-Iu (sccp_user.c:584) DLSCCP NOTICE OsmoMSC-A-Iu: Creating default route (sccp_user.c:590) DLSCCP NOTICE OsmoMSC-A-Iu: No unassociated ASP for m3ua, creating new ASP asp-clnt-OsmoMSC-A-Iu (sccp_user.c:629) DLGLOBAL ERROR Trying to dispatch event 17 to non-existent FSM instance! (osmo_ss7_as.c:118) DLGLOBAL ERROR backtrace() returned 9 addresses (backtrace.c:42) DLGLOBAL ERROR /lib/x86_64-linux-gnu/libosmocore.so.22(_osmo_fsm_inst_dispatch+0x486) [0x7f4b057e68d6] (backtrace.c:53) DLGLOBAL ERROR /lib/x86_64-linux-gnu/libosmo-sigtran.so.10(osmo_ss7_as_add_asp+0x15b) [0x7f4b055596ab] (backtrace.c:53) DLGLOBAL ERROR /lib/x86_64-linux-gnu/libosmo-sigtran.so.10(osmo_sccp_simple_client_on_ss7_id+0x97b) [0x7f4b0557381b] (backtrace.c:53) DLGLOBAL ERROR osmo-msc(+0x185ca) [0x55b74b7575ca] (backtrace.c:53) DLGLOBAL ERROR osmo-msc(+0x1780a) [0x55b74b75680a] (backtrace.c:53) DLGLOBAL ERROR /lib/x86_64-linux-gnu/libc.so.6(+0x29d90) [0x7f4b05167d90] (backtrace.c:53) DLGLOBAL ERROR /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x80) [0x7f4b05167e40] (backtrace.c:53) DLGLOBAL ERROR osmo-msc(+0x181c5) [0x55b74b7571c5] (backtrace.c:53) DLSCCP NOTICE OsmoMSC-A-Iu: Using ASP instance asp-clnt-OsmoMSC-A-Iu (sccp_user.c:699) DLSS7 NOTICE 0: Creating SCCP instance (osmo_ss7.c:408) DSGS NOTICE SGs socket bound to r=NULL<->l=192.168.75.185:29118 (sgs_server.c:186) DMSC NOTICE A-interface: SCCP user OsmoMSC-A:RI=SSN_PC,PC=(no PC),SSN=BSSAP, cs7-instance 0 ((null)) (msc_main.c:806) DMSC NOTICE Iu-interface: SCCP user OsmoMSC-IuCS:RI=SSN_PC,PC=(no PC),SSN=RANAP, cs7-instance 0 ((null)) (msc_main.c:826) DLINP NOTICE 127.0.0.1:4222 connection done (ipa.c:143) DLINP NOTICE received ID_GET for unit ID 0/0/0 (ipaccess.c:897) DLM3UA NOTICE 0: asp-asp-clnt-OsmoMSC-A-Iu: Received NOTIFY Type State Change:AS Inactive () (m3ua.c:622) DLSS7 NOTICE xua_default_lm(asp-clnt-OsmoMSC-A-Iu)[0x55b74ca95a20]{ACTIVE}: Ignoring primitive M-ASP_ACTIVE.confirm (xua_default_lm_fsm.c:400) DLM3UA NOTICE 0: asp-asp-clnt-OsmoMSC-A-Iu: Received NOTIFY Type State Change:AS Active () (m3ua.c:622) DSGS NOTICE r=192.168.75.181:51999<->l=192.168.75.185:29118: Connection lost (sgs_server.c:101) DSGS NOTICE r=192.168.75.181:37170<->l=192.168.75.185:29118: Connection lost (sgs_server.c:101) DSGS NOTICE r=192.168.75.181:42624<->l=192.168.75.185:29118: Connection lost (sgs_server.c:101) DSGS NOTICE r=192.168.75.181:40043<->l=192.168.75.185:29118: Connection lost (sgs_server.c:101) DSGS NOTICE r=192.168.75.181:51479<->l=192.168.75.185:29118: Connection lost (sgs_server.c:101)

2 1

eSIM for private networks
by Sipos Csaba 13 Nov '24

13 Nov '24

Dear Harald, I watched your excellent presentation on eSIMs and I have two questions just to make sure I understand the situation correctly. 1. Both the eSIM profile and the SM-DP+ server's certificate has to be signed by the GSMA in order to be able to provide eSIM services to commercial handsets? 2. If the above is the case, that means we effectively lost control of the SIM infra, as we always have to rely on 3rd party SM-DP+ and eSIM profile providers who can provide the necessary signing for both the eSIM profiles and the SM-DP+ server certs signed by GSMA? Based on what you implied during the OsmoDevCall call about getting certified, I am under the impression that Sysmocom will not be able to provide nor eSIM profiles nor SM-DP+ services that can be used for commercial handsets? If this is the case, can you kindly redirect me to a vendor/provider who you have good experience with in this regard? Much appreciate your help! Regards, Csaba

2 3

connect osmo-BTS-trx to any other commercial Network
by Masumeh Sadat Tohidi 12 Nov '24

12 Nov '24

Hi. Is It possible to connect osmo-BTS-trx to any other commercial BSC and MSC?

1 0

12 Nov '24

1 0

Expert Help with Statistics Assignment: Boost Your Grades Today
by martinklay09＠gmail.com 09 Nov '24

09 Nov '24

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