OpenBSC February 2009

openbsc@lists.osmocom.org

11 participants
22 discussions

software load via A-bis
by Harald Welte 03 Feb '09

03 Feb '09

Hi! JFYI: Software load through the A-bis / E1 interface is only marginally faster than through the serisal RS232 line. The theoretical maximum speed is the 64kbps of the E1 timeslot, which should give quite a bit of improvement over the 19200bps serial line. However, the BS-11 is throttling down the transver even via A-bis. I have tried to increase the window size to 20 (LMT has a max of 8. I tried up to 32 but then the transfer fails) The speed that I'm getting now is somewhere around 1232 bytes per second, which is about 9656bps. Do they use a 9600bps serial line somewhere inside the BS-11 to route those software updates through? I haven't finished an entire transfer, but it seems like the transfer would take some 36 minutes using this method. Not too far off the 45minutes that we get with LMT or bs11_config. I guess "in the field" this doesn't really matter since they can install the software image while the BTS is still in operation, and then at some point schedule a reboot which activates the new software. p.s.: yes, I removed all delays (usleep calls) from misdn.c before testing. -- - 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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bs11_config update
by Harald Welte 01 Feb '09

01 Feb '09

Hi! Just a quick update on bs11_config, the program used for BS-11 configuration over a serial line. I have now * successfully loaded SMU safety and software (SWL) from regular files in the filesystem (not as easy since BS-11 firmware comes as multiple files that need to be loaded consecutively) * created all objects required for minimal config, including TRX1/PA1 activation * display the A-bis/T link state, phase/subphase and MBBCU status from bs11_config Furthermore, I have added abis_nm functions to * set the A-bis external time (important for getting correct timestamps for alarms) * obtain the BS-11 serial number (as printed on the case). -- - 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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OpenBSC February 2009