Feeder cross in 3G Sites

[electron]

Hi friends,


Can any body please explain how we can identify Cross feeder(Partial swap) in 3G sites by drive test?


Thanks

[Alex_R]

you can identify a point which should be served by S1 and check RSCP Ec/No if it is good but with different Scrambling Code (SC) for example S2

hence you face cross sectors

if in this point you can see RSCP Ec/No for both S1 & S2 with good level and in another area both with bad level (RSCP)

hence you face cross feeders

[rimoucha]

Hello Electron,

I abolutely agree with Alex.Attached is an example

Best regards,

[TEMS]

Hi friends,


Can any body please explain how we can identify Cross feeder(Partial swap) in 3G sites by drive test?


Thanks

Hi friend
can check it on Nemo Analyzer
please see example bellow

[FFETIQUE]

You just need to know azimuth and scrambling code from each sector and to check if its correct during drive test.

[Ericsson_RND]

Hi All,
Can some body explain to me how can we recognize by TEMS if one of the feeders of sector A is connected to DRU 1 and the other connected to another DRU by mistake,

Regards
Ahmed Al-Shawi

[mon3em]

sala7 is right

Also you will find UE transmitting @ maximum power even close to site... cuz you are losting the Div gain.

mon3em

[tsiz]

Hi All,
Can some body explain to me how can we recognize by TEMS if one of the feeders of sector A is connected to DRU 1 and the other connected to another DRU by mistake,

Regards
Ahmed Al-Shawi

You will need to block each radio separately and drive test with one radio and see where it serves..if it serves in the wrong area, you have a swapped sector.

[Ericsson_RND]

Dear TZIS and Sala7

Thanks for your feedback.


Regards
Ahmed Al-Shawi

[sala70vic]

You will need to block each radio separately and drive test with one radio and see where it serves..if it serves in the wrong area, you have a swapped sector.

adding:
the above method is perfect if the swapped feeders belong to Tx/Rx main ones.

If the swapped feeders belong to Rx diversity so try to monitor RTWP of both feeders "same DRU" at the same time all over the day, you should find a big difference.

thanks,
regards,