Hi team
I want to test the data on timeslot basis, where I can activate alternate timeslot oN B200.
How this is possible?
I tried to add parameters in bts-conf file with slotmask as 10101010. But I don't see any change.
I also tried to change this value from 0xff to 0xaa in osmo-bts-trx code, but I get error.
Can u please help?
Regards Mayuri
Hi Mayuri,
from your e-mail it's unfortunately not clear what exactly you are trying to achieve. Please fill us in on the bigger picture so we can get an idea of how to help.
Hi Harald
We want to test TX chain power on timeslot basis.
Currently as all timeslots are enabled, I see power coming in all timeslots.
But if I want to make only alternate timeslot active, I tried changing slotmask as 10101010 in bts conf file. I also tried to change in code in trx_if.c.
But I don't see any change in power.
I am using osmo-bts-trx and osmo-trx.
Let me know if this is clear.
Regards Mayuri
On Thu, Oct 26, 2017 at 12:18 AM, Harald Welte laforge@gnumonks.org wrote:
Hi Mayuri,
from your e-mail it's unfortunately not clear what exactly you are trying to achieve. Please fill us in on the bigger picture so we can get an idea of how to help.
--
- Harald Welte laforge@gnumonks.org
http://laforge.gnumonks.org/
================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)
Hi Mayuri,
On Thu, Oct 26, 2017 at 09:26:11AM +0530, Mayuri Tendulkar wrote:
We want to test TX chain power on timeslot basis.
I see.
Currently as all timeslots are enabled, I see power coming in all timeslots.
This is the correct behavior as per 3GPP specs for C0 (TRX 0) of a BTS, which must always operate at constant full power. Transmiting only selective timeslots is only permitted for TRX1..N but not for TRX0. I understand you are not in normal operation but in a test setup, but the code was written for normal operation :)
So my first question would be: Is it possible for you to do those tests on TRX1..N of your BTS, or does it have to be on TRX0? If it has to be TRX0, we would most likely need to develop some (small) changes to accomodate that.
On TRX1..N you can use the BSC command "bts <0-255> trx <0-255> timeslot <0-7> pdch (activate|deactivate)" to activate a given timeslot or deactivate it. It can be used at the "enable" node of the BSC/NITB.
Unless you have valid uplink bursts in your test setup, you should also use "radio-link-timeout infinite" which is a configuration command at the "bts" node in BSC/NITB.
But if I want to make only alternate timeslot active, I tried changing slotmask as 10101010 in bts conf file. I also tried to change in code in trx_if.c.
This setting is a logical setting, it only affects which slots the L2/L3 will ever allocate/activate/use. The purpose is (I believe) to work on systems which have too limited processing power to handle all 8 slots.
Regards, Harald
-
Harald Welte -
Mayuri Tendulkar