March 2024 - baseband-devel - lists.osmocom.org

SMS not received in mobile - Virtual layer1 (osmo-nitb + osmo-bts + osmocom-bb/mobile)
by Sebastian Stumpf 05 Jun '26

05 Jun '26

Hi, Some of my sent SMS are not received by my mobile and I try to figure out if this is a problem with my virtual layer 1, configuration or something in the layers 2+. I use: osmo-nitb: 1 subscriber in hlr (id 1, ext 017519191919) osmo-bts: virt-phy, arfcn 666, TS0=CCCH+SDCCH4, TS1=SDCCH8 MS layer23 app mobile: is the subscriber from osmo-nitb MS layer1 virt-phy: virtual gsmtap layer between bts and mobile I want: Send a sms to subscriber 017519191919. osmo-nitb VTY: OpenBSC# subscriber id 1 sms sender id 1 send Test I have 2 outcomes, first one is the failure. See https://www.dropbox.com/s/eunpfioq518t09a/mobile--ms-virt--bts-virt--bsc-ni… for the pcap. Do not wonder about the duplicated gsmtap messages from mobile, the ones to ip 225.0.0.1 are over virt-phy layer, the ones to localhost from the gsmtap logging option from mobile. Filter them out via "gsmtap && (ip.dst != 127.0.0.1)". 602-613: RR channel establishment with RA and IA as reaction to paging in 590 627,631: SABM from BTS to establish async balanced mode on SAPI3 (SMS) and the ACK from MS 656,684,699: I-Data frames on SAPI3 containing the sms 660,688,703: ReceiveReady's from MS (That ACK all I-frames before N(R)-1 as far as I understood) For me, that looks good and I really do not understand why the MS will not answer with the CP-ACK/RP-ACK after receiving the SMS Data in 699. The LAPDM link will stay up for some more time and be used by the network for retransmission of the sms (1149), but MS will never react to it on the SMS layer (CP-ACK, RP-ACK). Here is the console log for the mobile (https://www.dropbox.com/s/6gug5cd4up5qv7y/mobile--ms-virt--bts-virt--bsc-ni…) The paging is answered in line 378: Fri Mar 10 10:42:06 2017 DLLAPD <0012> lapd_core.c:793 SABM(E) received in state LAPD_STATE_IDLE Second outcome is a successfully sent sms from network to ms. See https://www.dropbox.com/s/ghdn7pc0j4vifbe/mobile--ms-virt--bts-virt--bsc-ni… for the pcap. What is different here? There is no paging, but the sms is sent within the dedicated channel used for the location update initiated by the phone started up. Why there is another outcome, I don't know. 169-181: RR channel establishment with RA and IA as part of mibiles startup routine to make location update 188,416: Location udpdate procedure on SAPI0 230,234: SABM from BTS to establish async balanced mode on SAPI3 (SMS) and the ACK from MS 396,444: I-Data frames on SAPI3 containing the sms 400,449: RR's from MS 450: CP-ACK for BTS 482,499: RP-ACK I-Frames for Network (osmo-nitb) Again, the console log of the mobile (https://www.dropbox.com/s/cujsn40d43g6wxk/mobile--ms-virt--bts-virt--bsc-ni…) The SABM on SAPI3 on downlink is received in line 206: Fri Mar 10 11:06:13 2017 DLLAPD <0012> lapd_core.c:793 SABM(E) received in state LAPD_STATE_IDLE The signaling looks quite similar in both cases, but one time the mobiles sms handler responds to CP-DATA msg containing the SMS, the other time not. Can someone find an error in the signaling I did not see? Is there a known Bug? To be honest, I last merged my branch with master some time ago (~ Jan 18 2017) and thus did not update osmo-nitb and the libraries since then to avoid compatibility problems. Have there been recent changes that could cause that behavior? Thank you and Kind Regards, Sebastian

4 3

Engagetted !
by Sébastien Lorquet 14 Oct '25

14 Oct '25

http://www.engadget.com/2010/12/29/researchers-eavesdrop-on-encrypted-gsm-c… Congrats!

7 7

Solid Online Nursing Class Course
by vatemiy934＠meogl.com 10 Oct '25

10 Oct '25

https://acemycourse.net/com-fpx-1250-assessment-4-written-communication-com…

3 2

how to run osmocom-bb with grgsm in usrp b210 to connect openBTS?
by hellowangfang＠gmail.com 19 Aug '24

19 Aug '24

I used osmocom-bb and grgsm with usrp b210 to connect openBTS, but failed. The command is "./mobile -c /home/oi/wf/osmocom-bb/doc/examples/mobile/default.cfg","./trxcon -p 5075 " ,"grgsm_trx -p 5075" . When i used “./cell_log -A 1 ”， it could find plmn 1-1 with arfcn 1 which is same with openBTS. DSUM INFO cell_log.c:344 Sync ARFCN 1 (rxlev -105, 1 syncs left) DSUM INFO cell_log.c:372 Measure from 1 to 1 DSUM INFO l1ctl.c:1177 start_pm L1CTL_PM_CONF DSUM INFO cell_log.c:400 start_pm S_L1CTL_PM_DONE DSUM INFO cell_log.c:363 Measurement done DSUM INFO cell_log.c:372 Measure from 1 to 1 DSUM INFO l1ctl.c:1177 start_pm L1CTL_PM_CONF DSUM INFO cell_log.c:400 start_pm S_L1CTL_PM_DONE DSUM INFO cell_log.c:363 Measurement done DSUM INFO cell_log.c:372 Measure from 1 to 1 DSUM INFO l1ctl.c:1177 start_pm L1CTL_PM_CONF DSUM INFO cell_log.c:400 start_pm S_L1CTL_PM_DONE DSUM INFO cell_log.c:363 Measurement done DSUM INFO cell_log.c:372 Measure from 1 to 1 DSUM INFO l1ctl.c:1177 start_pm L1CTL_PM_CONF DSUM INFO cell_log.c:400 start_pm S_L1CTL_PM_DONE DSUM INFO cell_log.c:363 Measurement done DSUM INFO cell_log.c:372 Measure from 1 to 1 DSUM INFO l1ctl.c:1177 start_pm L1CTL_PM_CONF DSUM INFO cell_log.c:400 start_pm S_L1CTL_PM_DONE DSUM INFO cell_log.c:363 Measurement done DSUM INFO cell_log.c:344 Sync ARFCN 1 (rxlev -105, 1 syncs left) DSUM INFO cell_log.c:190 Cell: ARFCN=1 MCC-MNC=001-01 (Test, Test) But when test with sim testcard 1, it failed to find the 1-1 cell. Could anyone give any suggestion about this? Thanks a lot! 6.5.0-25-generic #25~22.04.1-Ubuntu osmocom-bb: commit 0d1ab4c8d2cbe0ba72662d5b466fb6c60cb8b45f (HEAD -> master, origin/master, origin/HEAD) grgsm: https://github.com/bkerler/gr-gsm.git origin/maint-3.10_with_multiarfcn

4 7

How to add gdb info when build mobile and trx? Thank you!
by hellowangfang＠gmail.com 29 Mar '24

29 Mar '24

I used mobile, trx,grgsm,sdr to connect to openBTS, still failed. I want to use gdb to trace the internal info, how to enable gdb info when build them? Thank.

1 0

Excel in NURS FPX 4010 Assessments with Our Expert Online Tutoring
by williammores96＠gmail.com 17 Mar '24

17 Mar '24

Excel in NURS FPX 4010 Assessments with Our Expert Online Tutoring Dominate your NURS FPX 4010 assessments with our specialized tutoring services. From Assessment 1 to 4, we provide comprehensive support to complete your nursing program with top grades. Start your success story today! Introduction to NURS FPX 4010 Series Assessments The NURS FPX 4010 series represents a significant milestone in the journey of nursing students. It challenges students to apply their knowledge in real-world scenarios, enhancing their clinical reasoning and decision-making skills. Whether you're just starting with NURS FPX 4010 Assessment 1 or gearing up for NURS FPX 4010 Assessment 4, each assessment is a step closer to achieving your academic and professional goals in nursing. Why Our Tutoring Services Are Essential for Your Success Navigating through the NURS FPX 4010 series requires more than just hard work; it demands strategic study plans and insights from experienced professionals. Our tutoring services are designed to guide you through each assessment, including NURS FPX 4010 Assessment 2 and NURS FPX 4010 Assessment 3, ensuring you grasp the core concepts and apply them effectively. Customized Learning for Maximum Impact We believe in a personalized approach to learning, recognizing that each student has unique strengths and challenges. Our tutors tailor their teaching methods to suit your individual needs, focusing on areas that require additional attention, such as NURS FPX 4010 Assessment 4, to maximize your learning outcome. Expert Tutors Ready to Assist You Our team comprises seasoned nursing educators who excel in their respective fields. They bring a wealth of knowledge and practical experience, providing invaluable insights into successfully completing assessments like NURS FPX 4010 Assessment 1. With our experts, you're not just preparing for an exam; you're gearing up for a successful career in nursing. Achieve Excellence in One Billing Cycle Our goal is to help you complete your BSN and MSN programs efficiently, without compromising the depth of learning. By focusing on crucial assessments, including NURS FPX 4010 Assessment 2 and NURS FPX 4010 Assessment 3, we streamline your study process to ensure you're exam-ready in the shortest possible time. Comprehensive Support Tailored to Your Needs From "Write my assessment" to "Online assessment help," we offer a range of services to support your academic journey. Our comprehensive tutoring package includes review sessions, practice questions, and personalized feedback, covering every aspect of the NURS FPX 4010 Assessment 4 and beyond. Your Partner in Nursing Education Choosing our tutoring services for the NURS FPX 4010 series is a step towards academic excellence and professional mastery. With our personalized support, expert guidance, and comprehensive resources, you'll be well-equipped to tackle each assessment with confidence and achieve your goals in the competitive field of nursing. Elevate your nursing education with our expert tutors. Contact us now to learn how we can help you excel in the NURS FPX 4010 series and advance your career with confidence.

1 0

pycrate repo update
by benoit michau 02 Mar '24

02 Mar '24

Dear osmocom developpers, This is just to let you know that the Python library pycrate has a new home : https://github.com/pycrate-org/pycrate. The packages on Pypi are now feeded from there. This library can be used in many cases dealing with mobile signalling. I wanted to let you know, as even if I am not aware of any osmocom projects depending on it, some of you may use the library from time to time, or could have local applications depending on it. Best Regards Benoit

1 0