- OpenBSC - lists.osmocom.org

Regarding implementation of RLC/MAC in open BSC
by satishn 23 Dec '10

23 Dec '10

hi , Im new to Open BSC .In your website it is given that "have the BTS interoperate a SGSN with Gb (NS-over-IP) interface " Does this mean that PCU Stacks(RLC/MAC,BSSGP and NS) are implemented at the BTS. Does Open BSC support PCU stacks. Kindly respond. Regards Satish N

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OpenBSC / lcr integration through unix domain socket
by Harald Welte 23 Dec '10

23 Dec '10

Hi! I've finally taken up the taks to split the 'siamese twin' of linking lcr with bsc_hack and replace it with a PF_UNIX, SOCK_SEQPACKET socket. I've done quite a bit of testing and it seems to work fine. The bsc_hack side is complete, i.e. it properly handles the loss of the lcr connection and drops all CC transactions at that point. The lcr side is less finished, especially * it will not drop all calls when the OpenBSC [socket] goes away * it will not re-connect if OpenBSC has disappeared I hope those can still be adressed properly ahead of 27C3. Andreas: Not sure if you have some time to look at it. I'll be working on higher priority items for the 27C3 deployment tomorrow... The openbsc code is in the laforge/mncc_sock branch of openbsc.git The lcr code can be found in the mncc_sockk branch of the unofficial lcr.git repo at git://git.osmocom.org/lcr.git Regards, Harald -- - Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

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AW: mISDN-problem
by Andreas.Eversberg 20 Dec '10

20 Dec '10

> newbie question: what does this dmesg mean? hi thomas, this happens, if the user space process does not read from the b-channel socket. since the b-channels have no flow control, the packets get dropped and an error message is printed by the kernel. what program do you use? andreas

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hlrsync.py question
by Thomas Ansorg 18 Dec '10

18 Dec '10

hi someone please tell a linux newbie like me: what this script does and how it is executed (hlrsync hlr.sqlite3 dont work) i'm just at the beginning of learning pearl,python and other script stuff T. -- Wer Rechtschreibfehler findet, darf sie behalten!

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mISDN-problem
by Thomas Ansorg 17 Dec '10

17 Dec '10

hello newbie question: what does this dmesg mean? T. -- Wer Rechtschreibfehler findet, darf sie behalten!

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multi drop config - almost done
by Thomas Ansorg 17 Dec '10

17 Dec '10

hello after compiling the new software, bs11_config tells me for bts1 (the working one): bs11_config (C) 2009-2010 by Harald Welte and Dieter Spaar This is FREE SOFTWARE with ABSOLUTELY NO WARRANTY LMT LOGON: ACK PHASE: 3 Normal MBCCU0: Load MBCCU1: No Load Abis-link: Restoring BS11 ATTRIBUTES: BS-11 ESN PCB Serial Number: 001104 BS-11 ESN Hardware Code Number: 135-2044/03.07 BS-11 ESN Firmware Code Number: 135-2044/03.07 PLL Set Value=1006, Work Value=1038 SITE MANAGER ATTRIBUTES: E1 Channel: Port=0 Timeslot=1 (Full Slot) TEI: 25 BS11 Line Interface ATTRIBUTES: PLL Mode: Standalone BS11 CCLK ATTRIBUTES: CCLK Accuracy: High (1) CCLK Type=0 BS11 Power Amplifier 0 ATTRIBUTES: TRX Power: 30mW (GSM) BPORT0 ATTRIBUTES: Line Configuration: Multi-Drop (1) BPORT1 ATTRIBUTES: Line Configuration: Multi-Drop (1) LMT LOGOFF: ACK *************************************************************************** i set the bport multi thing on my own the 2nd bts said this: bs11_config (C) 2009-2010 by Harald Welte and Dieter Spaar This is FREE SOFTWARE with ABSOLUTELY NO WARRANTY LMT LOGON: ACK PHASE: 3 Normal MBCCU0: Load MBCCU1: No Load Abis-link: Restoring BS11 ATTRIBUTES: BS-11 ESN PCB Serial Number: 001112 BS-11 ESN Hardware Code Number: 135-2044/03.03 BS-11 ESN Firmware Code Number: 135-2044/03.03 PLL Set Value=1073, Work Value=1073 SITE MANAGER ATTRIBUTES: E1 Channel: Port=0 Timeslot=6 (Full Slot) TEI: 26 BS11 Line Interface ATTRIBUTES: PLL Mode: Standalone BS11 CCLK ATTRIBUTES: CCLK Accuracy: High (1) CCLK Type=0 BS11 Power Amplifier 0 ATTRIBUTES: TRX Power: 30mW (GSM) BPORT0 ATTRIBUTES: Line Configuration: Multi-Drop (1) BPORT1 GET ATTR NACK LMT LOGOFF: ACK ***************************************************************************** as you can see, i set the port to 0 on both, bts1 works on ts1, tei 25 and bts2 on ts6, tei 26. does this configuration match with the attached config-file? unfortunately i couldnt test it thoroghly today, it was late :-( there is a strange errormessage at the end of bts2 report, a possible problem? anyway, i wasnt able to create a bport, neither in connected nor disconnected mode T. -- Wer Rechtschreibfehler findet, darf sie behalten!

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Re: 3G (NodeB / femtocell) roadmap
by Joe Eggleston 17 Dec '10

17 Dec '10

On Thu, Dec 16, 2010 at 5:33 AM, Sylvain Munaut <246tnt(a)gmail.com> wrote: > But each time you have to search for whatever name the operator has > for it (like "Home 3G" for SFR, or "Sure Signal" for Vodafone, ...) > In case this is helpful to anyone else, I stumbled on this page that has a pretty good list of the providers using the various femtocells: http://www.thinkfemtocell.com/Examples/where-can-i-buy-a-femtocell.html

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TRX is not responding error message
by Peter Hasse 17 Dec '10

17 Dec '10

Hi One of our nanoBTSs startet to reboot very frequently. The debug telnet console shows this error: 12168:WARN:OAM_RES:res_trx_status.c#231:TRX is not responding - reinitialising the unit... 13251:DBG:OAM_IM:Stopping "Primary OML Fallback Client" > 13251:DBG:OAM_IM:Stopping "Secondary OML Server" > 13251:DBG:OAM_IM:Stopping "Secure Secondary OML Server" 13252:DBG:OAM_IM:Not stopping "IML Site Server" - has not been started 13252:DBG:OAM_IM:Not stopping "Secure IML Site Server" - has not been started 13252:DBG:OAM_IM:Stopping "IML Bts Server" > 13252:DBG:OAM_IM:Stopping "Secure IML Bts Server" 13252:DBG:OAM_IM:Stopping "IRL Patched Routing Link" 13252:DBG:OAM_IM:Failed to inject event=1="STOP" into link source (token=9) 13284:DBG:IP_CHAN_SERVER:Closed server listening on port 3006 > 13284:DBG:IP_CHAN_SERVER:Closed server listening on port 3026> 13285:DBG:IP_CHAN_SERVER:Closed server listening on port 3014> 13285:DBG:IP_CHAN_SERVER:Closed server listening on port 3034> 13458:DBG:IP_CHAN_RX_A:15190:ipChanConn: EVENT 0x00001743 rxd in STATE connected 13458:DBG:IP_CHAN_RX_A:15191:ipChanConn: EVENT 0x00001741 rxd in STATE disconnectclosing here is the output of openBSC <0005> abis_nm.c:518 OC=CHANNEL(03) INST=(00,00,06) Sending OPSTART <0005> abis_nm.c:518 OC=CHANNEL(03) INST=(00,00,07) STATE CHG: OP_STATE=Disabled AVAIL=Dependency(05) <0005> abis_nm.c:1970 Set Chan Attr (bts=0,trx=0,ts=7) <0005> abis_nm.c:518 OC=CHANNEL(03) INST=(00,00,07) Sending OPSTART <0005> abis_nm.c:518 OC=CHANNEL(03) INST=(00,00,00) Software Activated Report <0005> abis_nm.c:518 OC=CHANNEL(03) INST=(00,00,01) Software Activated Report <0005> abis_nm.c:518 OC=CHANNEL(03) INST=(00,00,02) Software Activated Report <0005> abis_nm.c:518 OC=CHANNEL(03) INST=(00,00,03) Software Activated Report <0005> abis_nm.c:518 OC=CHANNEL(03) INST=(00,00,04) Software Activated Report <0005> abis_nm.c:518 OC=CHANNEL(03) INST=(00,00,05) Software Activated Report <0005> abis_nm.c:518 OC=CHANNEL(03) INST=(00,00,06) Software Activated Report <0005> abis_nm.c:518 OC=CHANNEL(03) INST=(00,00,07) Software Activated Report <0005> abis_nm.c:518 OC=BASEBAND-TRANSCEIVER(04) INST=(00,00,ff) STATE CHG: OP_STATE=Disabled AVAIL=Dependency(05) ADM=Unlocked <0005> abis_nm.c:518 OC=BASEBAND-TRANSCEIVER(04) INST=(00,00,ff) IPACCESS(0xe1): RSL CONNECT ACK IP=192.168.0.1 PORT=3003 STREAM=0x00 <0005> abis_nm.c:518 OC=RADIO-CARRIER(02) INST=(00,00,ff) STATE CHG: OP_STATE=Disabled AVAIL=OK(ff) ADM=Unlocked <0005> abis_nm.c:518 OC=RADIO-CARRIER(02) INST=(00,00,ff) Sending OPSTART <0005> abis_nm.c:518 OC=CHANNEL(03) INST=(00,00,00) CHANGE ADMINISTRATIVE STATE NACK CAUSE=Message cannot be performed <0005> abis_nm.c:518 OC=CHANNEL(03) INST=(00,00,01) CHANGE ADMINISTRATIVE STATE NACK CAUSE=Message cannot be performed <0005> abis_nm.c:518 OC=CHANNEL(03) INST=(00,00,02) CHANGE ADMINISTRATIVE STATE NACK CAUSE=Message cannot be performed <0005> abis_nm.c:518 OC=CHANNEL(03) INST=(00,00,03) CHANGE ADMINISTRATIVE STATE NACK CAUSE=Message cannot be performed <0005> abis_nm.c:518 OC=CHANNEL(03) INST=(00,00,04) CHANGE ADMINISTRATIVE STATE NACK CAUSE=Message cannot be performed <0005> abis_nm.c:518 OC=CHANNEL(03) INST=(00,00,05) CHANGE ADMINISTRATIVE STATE NACK CAUSE=Message cannot be performed <0005> abis_nm.c:518 OC=CHANNEL(03) INST=(00,00,06) CHANGE ADMINISTRATIVE STATE NACK CAUSE=Message cannot be performed <0005> abis_nm.c:518 OC=CHANNEL(03) INST=(00,00,07) CHANGE ADMINISTRATIVE STATE NACK CAUSE=Message cannot be performed <0005> abis_nm.c:518 OC=BASEBAND-TRANSCEIVER(04) INST=(00,00,ff) Failure Event Report Type=processing failure Severity=warning level failure <0005> abis_nm.c:518 OC=BASEBAND-TRANSCEIVER(04) INST=(00,00,ff) Failure Event Report Type=processing failure Severity=warning level failure <0005> abis_nm.c:518 OC=BASEBAND-TRANSCEIVER(04) INST=(00,00,ff) Failure Event Report Type=processing failure Severity=warning level failure Another nanoBTS with same firmware and config works perfekt with the same openBTS installation. Switching to the second firmware bank and flashing a different firmware didnt solve the problem. Any hint where to look for more information ? mfg Peter

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Problem in the communication with a real MSC
by Luca Bertoncello 16 Dec '10

16 Dec '10

Hi, List! I'm trying to connect OpenBSC with a real MSC. Unfortunately I have many problems. The first is, that every minute or so, I got these errors: <000f> bsc_msc_ip.c:1047 The connection to the MSC was lost. <000f> bsc_msc_ip.c:976 Lost MSC connection. Freing stuff. <000f> bsc_msc.c:236 Attempting to reconnect to the MSC. <000f> bsc_msc.c:230 Attempting to reconnect to the MSC. <000f> bsc_msc.c:137 Attempting to connect MSC at 192.168.2.103:5000 <000f> bsc_msc.c:170 MSC Connection in progress <000f> bsc_msc.c:99 (Re)Connected to the MSC. <000f> bssap.c:92 Reset ACK from MSC I think, it is not normal, that the communication with the MSC was lost. Both of them (OpenBSC and MSC) are on the same Gigabit network, so there is no connection problem... Any idea? Another problem: I get very oft the error: <0000> chan_alloc.c:441 (bts=1,trx=0,ts=0,ss=0) Recycling Channel. Any idea? Thanks a lot! -- _______________________________________________________________________ Luca Bertoncello Entwicklung Mail: bertoncello(a)netzing.de NETZING Solutions AG Tel.: 0351/41381 - 23 Fröbelstr. 57, 01159 Dresden Fax: 0351/41381 - 12 _______________________________________________________________________ Impressum: NETZING Solutions AG - Fröbelstraße 57 - 01159 Dresden Sitz der Gesellschaft Amtsgericht Dresden HRB 18926 Vorstand Dieter Schneider - Aufsichtsratsvorsitzender Volker Kanitz USt.Id DE211326547 Mail: netzing.ag(a)netzing.de

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3G (NodeB / femtocell) roadmap
by Harald Welte 16 Dec '10

16 Dec '10

Hi all, i just wanted to keep you posted with the 2011 roadmap for 3G integration into our "Free Software Mobile Network" stack. This message summarizes the plan of what I expect to be working on. Comments welcome. 3G support directly in OpenBSC is, however, a bit more difficult than we originally anticipated. The primary problems are: * 3G and 2G share the same core network (CN = MSC/VLR/HLR/AuC/SGSN/GGSN) but have different radio access netowrk (RAN = BTS+BSC vs. NodeB+RNC) * the interface between RAN and CN is different, i.e. 'A' interface (08.08) in GSM case, RANAP in 3G case. * The encoding of the two protocols could not be any different. Hand-coded vs. complex ASN.1 structures So with OpenBSC, we face the following challenges: 1) We implement the GSM-RAN functionality and the CN in one process, without any separation or standardized interfaces between them 2) Implementing RANAP in C can be done, but is probably quite cumbersome given the tons of code asn1c generates and how difficult it seems to get all the memory allocation/freeing right in all the cases What we instead decided to do is: a) Split the BSC part from the CN by implementing the A interface (this is already finished, we now have osmo-bsc to do exactly that) b) Implement a new MSC part, using the A interface towards the BSC This is still possible using our existing code in the original OpenBSC, though we have not completed/finished it yet. The real goal is to have a new MSC, written in a higher-order language that provides proper tools for working with ASN.1 - e.g. Erlang. I have just started working on this and am more or less finished with the lower layers like SCCP and am moving into 08.08 and the actual layer3 protocols. There is already some initial funding secured for the first months of this work, and funding will likely continue. c) Once the 2G functionality of the Erlang MSC is working, add the RANAP interface to it. At this point we should more or less be able to directly connect the Alcatel-Lucent femtocells, as they basically consist of HomeNodeB plus an internal RNC handling the RRC protocol. d) Adding support for ip.access/Cisco/AT&T will need an implementation of their URSL protocol, which is proprietary. URSL can either be added to the new MSC directly, or a URSL<->RANAP translater be developed. e) Adding support for the Ubiquisys/SFR femtocell would require us to implement the UMA protocol stack. This can once again be either done as part of the MSC or using an external translator/gateway program. Regards, Harald -- - Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

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