Crash of UmTRX transceiver with dual TRX

Alexander Chemeris alexander.chemeris at
Mon Jul 8 16:04:06 UTC 2013

On Mon, Jul 8, 2013 at 7:53 PM, Thomas Tsou <tom at> wrote:
> On Mon, Jul 8, 2013 at 5:24 PM, Alexander Chemeris
> <alexander.chemeris at> wrote:
>> On Mon, Jul 8, 2013 at 5:58 PM, Thomas Tsou <tom at> wrote:
>>>> i do also get no reception from the phone at second trx (late
>>>> assignment, my tester showed me power on TS0 uplink). seems that rx and
>>>> tx does not work for some reason.
>>> If the slots aren't enabled, then both uplink and downlink will be
>>> disabled. This patch should cause Tx slot setting to be ignored and
>>> will send whatever core submits. We need the slot setting to set the
>>> TSC / RACH correlation, so Rx is not as simple.
>>>> also i found that the transceiver leaks about 2 megabytes every second.
>>>> after some minutes my test machine runs out of mem space.
>>> Should be resolved in the same patch.
>> Could you please push this to the osmo-trx repository?
> Do we want to permanently disable the filler table? This is a breaking
> change for OpenBTS. Or do you just mean the memory leak fix.

Memory leak is a must.

Constant Rx on disabled slots is only useful for testing. It would be
nice if this could be configurable (e.g. over the transceiver API),
but that's not a hard requirement.

Alexander Chemeris.
CEO, Fairwaves LLC / ООО УмРадио

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