2.0 -//Pentabarf//Schedule//EN PUBLISH NRLXAB@@pretalx.sysmocom.de -NRLXAB Welcome to OsmoDevCon 2024 en en 20240503T110000 20240503T111500 0.01500 Welcome to OsmoDevCon 2024 PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/NRLXAB/ Meeting Room Harald Welte (sysmocom) PUBLISH EZR7YN@@pretalx.sysmocom.de -EZR7YN Brief Introductions en en 20240503T111500 20240503T113000 0.01500 Brief Introductions PUBLIC CONFIRMED Discussion https://pretalx.sysmocom.de/osmodevcon2024/talk/EZR7YN/ Meeting Room PUBLISH SAX3FE@@pretalx.sysmocom.de -SAX3FE GPRS support in osmocom-bb en en 20240503T113000 20240503T120000 0.03000 GPRS support in osmocom-bb PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/SAX3FE/ Meeting Room Vadim Yanitskiy Pau Espin Pedrol PUBLISH CGVEVM@@pretalx.sysmocom.de -CGVEVM Operating Open Source Mobile Networks at Scale en en 20240503T120000 20240503T130000 1.00000 Operating Open Source Mobile Networks at Scale PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/CGVEVM/ Meeting Room Michael Iedema PUBLISH L3BXTR@@pretalx.sysmocom.de -L3BXTR 2.024 G en en 20240503T143000 20240503T150000 0.03000 2.024 G Our Osmocom 2G Data stack seems pretty mature at this point. Within the limits of the technology one can still use a remote ssh session, download email, do "instant messaging", including sending photos and short audio messages. All this works fine with one or two UE connected on a lab desk to a TRX configured for *high* capacity, However, introduce some TCH "stealing" the PDCH, some several 100's of UE (even just trying to attach) and some non optimal RF conditions and the capacity of the TRX is severely reduced. In these conditions, modern Android phones will saturate the TRX' capacity even with only their DNS lookups for "connectivity.google.com" - Maybe somewhat ironically? I've considered various steps to try to mitigate this situation. A common goto is to interfere with DNS, but this is disastrous. * In some cases, if Android cannot reach 8.8.8.8, regardless of what the network said to use for DNS, it will simply try again. - Of course, that can't be right. right? * If connectivity.google.com doesn't resolve, well that can't be right either, so try again. * If connectivity.google.com resolves, then HTTP GET /generate_204, and if this doesn't work, report to upper layer that there is no "Internet" and... you guessed it, try again. So we have to allow these things, which in itself is OK, as once the 204 is received, the phone will (probably) leave that alone, at least for a few minutes, but what comes next is all of what one might imagine is in the various phones, checks for system updates, app stores updates, uploading all the surveillance info that the google "services" cached while disconnected, and *who knows what else. *those running HTTP toolkit ;-) And that's before we even consider whatever is installed in "user space" (if such a thing can really be considered to exist on an Android device) starts. My current solution to this is to allow a limited amount of services, and then use netfilter's TARPIT module to get the phones to back off from everything else. Let's look a little a that, and maybe discuss what other optimizations could be done - For example netfilter scheduling and queues at the GGSN's IP interface. How about limiting the DL bandwidth per IP at this point? Give ACKs and short packets priority? We could limit the bandwidth here to the TRX capacity, but what if there is more than one SGSN, maybe an unknown number of SGSN (and TRX) connected at any one time? Now I've pretty much said everything I had to say in this description! But if would be good to discuss it, you all probably have some ideas! PUBLIC CONFIRMED Discussion https://pretalx.sysmocom.de/osmodevcon2024/talk/L3BXTR/ Meeting Room Keith Whyte PUBLISH RUHNZU@@pretalx.sysmocom.de -RUHNZU Codec resolution: AMR rates in 2G, 3G and SIP en en 20240503T151500 20240503T154500 0.03000 Codec resolution: AMR rates in 2G, 3G and SIP PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/RUHNZU/ Meeting Room Neels Hofmeyr PUBLISH KLWCKH@@pretalx.sysmocom.de -KLWCKH OsmoPCU: past, present and future en en 20240503T154500 20240503T163000 0.04500 OsmoPCU: past, present and future PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/KLWCKH/ Meeting Room Pau Espin Pedrol PUBLISH ZBJWUP@@pretalx.sysmocom.de -ZBJWUP High-performance I/O using io_uring via osmo_io en en 20240503T170000 20240503T174500 0.04500 High-performance I/O using io_uring via osmo_io PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/ZBJWUP/ Meeting Room Andreas Eversberg Harald Welte (sysmocom) PUBLISH TKCAPQ@@pretalx.sysmocom.de -TKCAPQ open5gs status: recent, current and future developments en en 20240503T174500 20240503T183000 0.04500 open5gs status: recent, current and future developments PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/TKCAPQ/ Meeting Room Sukchan Lee PUBLISH XB9MRJ@@pretalx.sysmocom.de -XB9MRJ DebugMux: getting baseband logs from old Sony Ericsson phones en en 20240503T183000 20240503T191500 0.04500 DebugMux: getting baseband logs from old Sony Ericsson phones PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/XB9MRJ/ Meeting Room Vadim Yanitskiy PUBLISH NTJBEG@@pretalx.sysmocom.de -NTJBEG Proposal for Osmocom non-for-profit en en 20240503T191500 20240503T200000 0.04500 Proposal for Osmocom non-for-profit PUBLIC CONFIRMED Discussion https://pretalx.sysmocom.de/osmodevcon2024/talk/NTJBEG/ Meeting Room Harald Welte (sysmocom) PUBLISH NRMJRW@@pretalx.sysmocom.de -NRMJRW Unstructured Supplementary Social Event (USSE) Friday en en 20240503T213000 20240504T000000 2.03000 Unstructured Supplementary Social Event (USSE) Friday PUBLIC CONFIRMED Misc (Food, ...) https://pretalx.sysmocom.de/osmodevcon2024/talk/NRMJRW/ Meeting Room PUBLISH HZ993V@@pretalx.sysmocom.de -HZ993V Lunch (Fri) en en 20240503T130000 20240503T143000 1.03000 Lunch (Fri) PUBLIC CONFIRMED Misc (Food, ...) https://pretalx.sysmocom.de/osmodevcon2024/talk/HZ993V/ Restaurant PUBLISH DW9CUE@@pretalx.sysmocom.de -DW9CUE Dinner (Fri) en en 20240503T200000 20240503T213000 1.03000 Dinner (Fri) PUBLIC CONFIRMED Misc (Food, ...) https://pretalx.sysmocom.de/osmodevcon2024/talk/DW9CUE/ Restaurant PUBLISH EWYAMR@@pretalx.sysmocom.de -EWYAMR Schedule Planning/Update (Sat) en en 20240504T100000 20240504T101500 0.01500 Schedule Planning/Update (Sat) PUBLIC CONFIRMED Discussion https://pretalx.sysmocom.de/osmodevcon2024/talk/EWYAMR/ Meeting Room PUBLISH DYGQXN@@pretalx.sysmocom.de -DYGQXN GlobalPlatform in USIM and eUICC en en 20240504T101500 20240504T110000 0.04500 GlobalPlatform in USIM and eUICC PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/DYGQXN/ Meeting Room Harald Welte (sysmocom) PUBLISH HZVJQK@@pretalx.sysmocom.de -HZVJQK srsRAN Project - Application in UL heavy traffic scenarios en en 20240504T110000 20240504T113000 0.03000 srsRAN Project - Application in UL heavy traffic scenarios PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/HZVJQK/ Meeting Room Supreeth Herle PUBLISH BUWUKG@@pretalx.sysmocom.de -BUWUKG My Kamailio Config en en 20240504T113000 20240504T120000 0.03000 My Kamailio Config Some of us at Osmocom have had reason to use Kamailio in recent years, even if only as a basic endpoint for osmo-sip-connector to loop back to itself. Kamailio is quite powerful, and it might be of interest to briefly go through the things I did with it, and also two other related FOSS projects: **SEMS** and **RTPENGINE** * Routing DID * Routing with Osmo dGSM * Gateway to Jitsi Conferences * Mangling Caller ID * Failover routing (Terrestrial/vSAT switch) * Codec Transcoding decisions (with multiple transcoding hosts and optional direct RTP without transcoding) *All this can be learned by reading Kamailo docs, however, there's nothing like learning from real experience, right? (or sharing that experience, and examples)* PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/BUWUKG/ Meeting Room Keith Whyte PUBLISH W9X8XH@@pretalx.sysmocom.de -W9X8XH Detailed workings of OTA for SIM/USIM/eUICC en en 20240504T120000 20240504T123000 0.03000 Detailed workings of OTA for SIM/USIM/eUICC PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/W9X8XH/ Meeting Room Harald Welte (sysmocom) PUBLISH TRWXYF@@pretalx.sysmocom.de -TRWXYF onomondo softsim: A software USIM implementation en en 20240504T123000 20240504T130000 0.03000 onomondo softsim: A software USIM implementation PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/TRWXYF/ Meeting Room Philipp Maier PUBLISH 3SYDHF@@pretalx.sysmocom.de -3SYDHF Lower Layer of osmo-trx-ms en en 20240504T143000 20240504T150000 0.03000 Lower Layer of osmo-trx-ms PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/3SYDHF/ Meeting Room Eric Wild PUBLISH Q3XYVC@@pretalx.sysmocom.de -Q3XYVC GSMTAPv3 - The long-awaited successor en en 20240504T151000 20240504T154000 0.03000 GSMTAPv3 - The long-awaited successor PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/Q3XYVC/ Meeting Room Shinjo Park PUBLISH DQRNVM@@pretalx.sysmocom.de -DQRNVM JESD204B : Interfacing to modern ADC/DAC with LiteX en en 20240504T154000 20240504T161000 0.03000 JESD204B : Interfacing to modern ADC/DAC with LiteX PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/DQRNVM/ Meeting Room Sylvain Munaut PUBLISH F7CZPM@@pretalx.sysmocom.de -F7CZPM fx2adc: Using USB oscilloscopes as general purpose ADC en en 20240504T161000 20240504T163000 0.02000 fx2adc: Using USB oscilloscopes as general purpose ADC PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/F7CZPM/ Meeting Room Steve Markgraf PUBLISH 9AXFSV@@pretalx.sysmocom.de -9AXFSV open5gs - feedback from user point of view en en 20240504T170000 20240504T174500 0.04500 open5gs - feedback from user point of view PUBLIC CONFIRMED Discussion https://pretalx.sysmocom.de/osmodevcon2024/talk/9AXFSV/ Meeting Room Pau Espin Pedrol Oliver Smith Alexander Couzens PUBLISH TUFJPD@@pretalx.sysmocom.de -TUFJPD Sky130 and TinyTapeout : A quick intro en en 20240504T174500 20240504T181500 0.03000 Sky130 and TinyTapeout : A quick intro PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/TUFJPD/ Meeting Room Sylvain Munaut PUBLISH QRBB9Y@@pretalx.sysmocom.de -QRBB9Y my hobby dabbles at examining network traces en en 20240504T181500 20240504T184500 0.03000 my hobby dabbles at examining network traces I'll show my little tools that I played with to trace and visualize GSM network activity. Immature as all of it is, maybe it is interesting to share and form a vision of a helpful tool. For example, when the task is to find out: at which network edge of a call leg do the RTP packets drop. First I need to know the chain of RTP ports that one particular subscriber uses. Then I need to count RTP packets arriving at each of them. Another example, there are a bunch of {PFCP,MGCP} conversations, setting up the user plane vectors. Are all the ports configured correctly? I have to read through the entire {PFCP,MGCP} session to overlay all the bits that form the final result. Another example, in a very active network, a particular voice call has a problem. How do I efficiently examine only those packets that are directly related to this particular TMSI / IMSI / RTP packet / RSL-ChanRef / ... PUBLIC CONFIRMED Workshop/Hacking https://pretalx.sysmocom.de/osmodevcon2024/talk/QRBB9Y/ Meeting Room Neels Hofmeyr PUBLISH ZYTJMD@@pretalx.sysmocom.de -ZYTJMD code review review en en 20240504T184500 20240504T191500 0.03000 code review review PUBLIC CONFIRMED Discussion https://pretalx.sysmocom.de/osmodevcon2024/talk/ZYTJMD/ Meeting Room Neels Hofmeyr PUBLISH J888MC@@pretalx.sysmocom.de -J888MC Anatomy of the eSIM profile en en 20240504T191500 20240504T200000 0.04500 Anatomy of the eSIM profile PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/J888MC/ Meeting Room Harald Welte (sysmocom) PUBLISH MTFNZZ@@pretalx.sysmocom.de -MTFNZZ GlobalPlatform demo en en 20240504T213000 20240504T214500 0.01500 GlobalPlatform demo PUBLIC CONFIRMED Workshop/Hacking https://pretalx.sysmocom.de/osmodevcon2024/talk/MTFNZZ/ Meeting Room Harald Welte (sysmocom) PUBLISH 3CLHAR@@pretalx.sysmocom.de -3CLHAR Unstructured Supplementary Social Event (USSE) Saturday en en 20240504T214500 20240505T000000 2.01500 Unstructured Supplementary Social Event (USSE) Saturday PUBLIC CONFIRMED Misc (Food, ...) https://pretalx.sysmocom.de/osmodevcon2024/talk/3CLHAR/ Meeting Room PUBLISH AVNHFM@@pretalx.sysmocom.de -AVNHFM Lunch (Sat) en en 20240504T130000 20240504T143000 1.03000 Lunch (Sat) PUBLIC CONFIRMED Misc (Food, ...) https://pretalx.sysmocom.de/osmodevcon2024/talk/AVNHFM/ Restaurant PUBLISH UYD9ZZ@@pretalx.sysmocom.de -UYD9ZZ Dinner (Sat) en en 20240504T200000 20240504T213000 1.03000 Dinner (Sat) PUBLIC CONFIRMED Misc (Food, ...) https://pretalx.sysmocom.de/osmodevcon2024/talk/UYD9ZZ/ Restaurant PUBLISH Q3CQPP@@pretalx.sysmocom.de -Q3CQPP Schedule Planning/Update (Sun) en en 20240505T100000 20240505T101500 0.01500 Schedule Planning/Update (Sun) PUBLIC CONFIRMED Discussion https://pretalx.sysmocom.de/osmodevcon2024/talk/Q3CQPP/ Meeting Room PUBLISH YJWERZ@@pretalx.sysmocom.de -YJWERZ osmo-epdg: The osmocom ePDG for VoWiFi en en 20240505T101500 20240505T110000 0.04500 osmo-epdg: The osmocom ePDG for VoWiFi PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/YJWERZ/ Meeting Room Pau Espin Pedrol Alexander Couzens PUBLISH RBXC3V@@pretalx.sysmocom.de -RBXC3V Introduction to XDP, eBPF and AF_XDP en en 20240505T110000 20240505T114500 0.04500 Introduction to XDP, eBPF and AF_XDP PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/RBXC3V/ Meeting Room Harald Welte (sysmocom) PUBLISH SGKKAA@@pretalx.sysmocom.de -SGKKAA Using bpftrace to analyze osmocom performance en en 20240505T114500 20240505T123000 0.04500 Using bpftrace to analyze osmocom performance PUBLIC CONFIRMED Workshop/Hacking https://pretalx.sysmocom.de/osmodevcon2024/talk/SGKKAA/ Meeting Room Harald Welte (sysmocom) PUBLISH UBCQFC@@pretalx.sysmocom.de -UBCQFC Low cost, high speed data acquisition over HDMI en en 20240505T123000 20240505T130000 0.03000 Low cost, high speed data acquisition over HDMI PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/UBCQFC/ Meeting Room Steve Markgraf PUBLISH 7YNMYH@@pretalx.sysmocom.de -7YNMYH A tale of OsmoGGSN, libgtpnl, kernel GTP-U and IPv6 en en 20240505T143000 20240505T151500 0.04500 A tale of OsmoGGSN, libgtpnl, kernel GTP-U and IPv6 PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/7YNMYH/ Meeting Room Oliver Smith PUBLISH SWEM3V@@pretalx.sysmocom.de -SWEM3V First impression of eUPF en en 20240505T151500 20240505T154500 0.03000 First impression of eUPF PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/SWEM3V/ Meeting Room Neels Hofmeyr PUBLISH 7NM7VL@@pretalx.sysmocom.de -7NM7VL iridium update en en 20240505T154500 20240505T161500 0.03000 iridium update We'll present what's new since our last osmodevcall talk. PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/7NM7VL/ Meeting Room Sec PUBLISH PJRSFA@@pretalx.sysmocom.de -PJRSFA CSFB in practice en en 20240505T170000 20240505T190000 2.00000 CSFB in practice Issues are such as: phone does not fall back, phone does not go back to LTE post call, Phone camps to 2G as soon as 2G is seen. Phone responds to paging on LTE, but RACH on 2g is not successful, _ more. Requirements: (some of which I can not bring): A plethora of phones with LTE support in a band we can use to test and compare behaviour. LTE radio (for me, having a DUL/RUS setup would be nice.) Sysmocom 2G BTS(s) + possibly 3G hNodeB Attenuators. Can we rig some kind of makeshift faraday cage? Maybe having a common server/VM setup for the core and for all to work on would be nice, to avoid using anyone's personal laptop for that. PUBLIC CONFIRMED Workshop/Hacking https://pretalx.sysmocom.de/osmodevcon2024/talk/PJRSFA/ Meeting Room Keith Whyte PUBLISH BBZBGM@@pretalx.sysmocom.de -BBZBGM Digital Telecommunication in HF band - WWWAN - World-Wide Wireless Area Network en en 20240505T190000 20240505T200000 1.00000 Digital Telecommunication in HF band - WWWAN - World-Wide Wireless Area Network HERMES project provides a software stack (and hardware integration) for very-long distance telecommunication on HF band. Our focus currently are isolated communities (in terms of telecommunication access), especially in Amazon rain forest communities and Central Africa. Our current setup uses a proprietary P2P HF software-modem (called VARA) and UUCP on top of it, basically for email exchange, and ad-hoc file transfer and remote command execution. Our next-generation system will use an open-source modem (called Mercury) we are developing, together new upper network layers, which we are still evaluating (for eg., NNCP and Reticulum). We aim to expand the network world wide, for providing accessibility anywhere in the world through HF, and towards this goal, we'll carry this discussion / workshop for evaluation which would be the best options to take. We are taking a couple of radios (sBitx v3) for a full chain demonstration, and also a fully functional board (without the enclosure) to donate to anyone who wants to play with HF telecom. PUBLIC CONFIRMED Discussion https://pretalx.sysmocom.de/osmodevcon2024/talk/BBZBGM/ Meeting Room Rafael Diniz Keith Whyte PUBLISH HKRW7L@@pretalx.sysmocom.de -HKRW7L Unstructured Supplementary Social Event (USSE) Sunday en en 20240505T213000 20240506T000000 2.03000 Unstructured Supplementary Social Event (USSE) Sunday PUBLIC CONFIRMED Misc (Food, ...) https://pretalx.sysmocom.de/osmodevcon2024/talk/HKRW7L/ Meeting Room PUBLISH R3Y7BP@@pretalx.sysmocom.de -R3Y7BP Lunch (Sun) en en 20240505T130000 20240505T143000 1.03000 Lunch (Sun) PUBLIC CONFIRMED Misc (Food, ...) https://pretalx.sysmocom.de/osmodevcon2024/talk/R3Y7BP/ Restaurant PUBLISH UAYZ7U@@pretalx.sysmocom.de -UAYZ7U Dinner (Sun) en en 20240505T200000 20240505T213000 1.03000 Dinner (Sun) PUBLIC CONFIRMED Misc (Food, ...) https://pretalx.sysmocom.de/osmodevcon2024/talk/UAYZ7U/ Restaurant PUBLISH VTAUQK@@pretalx.sysmocom.de -VTAUQK Session Planning/Update (Mon) en en 20240506T100000 20240506T101500 0.01500 Session Planning/Update (Mon) PUBLIC CONFIRMED Discussion https://pretalx.sysmocom.de/osmodevcon2024/talk/VTAUQK/ Meeting Room PUBLISH DUR7GS@@pretalx.sysmocom.de -DUR7GS Your favorite Osmocom related productivity tips and tools en en 20240506T101500 20240506T110000 0.04500 Your favorite Osmocom related productivity tips and tools PUBLIC CONFIRMED Discussion https://pretalx.sysmocom.de/osmodevcon2024/talk/DUR7GS/ Meeting Room Oliver Smith PUBLISH MU8HSC@@pretalx.sysmocom.de -MU8HSC GSM FAX and CSD Demo en en 20240506T110000 20240506T113000 0.03000 GSM FAX and CSD Demo PUBLIC CONFIRMED Talk https://pretalx.sysmocom.de/osmodevcon2024/talk/MU8HSC/ Meeting Room Harald Welte (sysmocom) Vadim Yanitskiy PUBLISH GSNMTD@@pretalx.sysmocom.de -GSNMTD Lunch (Mon) en en 20240506T123000 20240506T140000 1.03000 Lunch (Mon) Lunch PUBLIC CONFIRMED Misc (Food, ...) https://pretalx.sysmocom.de/osmodevcon2024/talk/GSNMTD/ Restaurant