MAIO Plan

Hello, just you 🙂

It depends… do cell A and cell C are using the same MA List ? (=same frequency list?)

regards,
pix

Cell A and cell C are using different frequencies.

Then it doesn’t matter what are the MAIO. MAIO is useful only when MA List and HSN are identical. your network planner knows what he’s doing 🙂

Regards
pix

HSH,

I must add a condition in your second scenario:

-and if you put MAL as :
(frequency reuse sequence grouping)
S A: 1,4,7,10,13,16,19
S B: 2,5,8,11,14,17,20
S C: 3,6,9,12,15,18,21

then you have to use MAIO as:
0,2,4
1,3,5
0,2,4

This MAIO planning is needed only if your HSN is the same in all three cells. If HSN is different, then any MAIO will do.

On the side, between scenario 1 and scenario 2, which one would you choose, quality-wise ?

Cheers,
Pix

Same as usual i would say. I can’t think of a restriction there. Neighbor and BSIC are two things that are related to the bcch frequency.

If I use BB Hopping, can I use same MAIO and HSN for all cells.???

Dears,
as I see that all are confusing between MAIO and HSN but as we know that they are different from each other;
main benefit of HSN is to avoid interference between Cell A and the surrounding Cells (Cells of different sites)that they are using the same MAL (Hopping sequence); is just giving the step that the syst. have to use in that cell,
but the main benefit of MAIO is to avoid interference between Cell A and other cells in the same site (Cells B & C); is just giving starting frequency in the MAL,
Dear MKT,
as you no that there is load factor limitation in SF-Hopping; sure 3 MALs (1*3) is better than 1
(1*1) in Quality and then you will phase some limitation in TRX configuration (because of Load factoras we mentioned before),
Load Factor= No. of Hop. TRX (without BCCH)/No. of freq. in MAL
and its better if we never pass 50%.

Regards

— JUST ME :

BBH is very different than SFH !! No MAIO, no HSN, no MA List in BBH.

All you have to do is do your frequency planning as usual (as if there was no hopping) but with accepting a lower C/I in average, and then activate BBH.

Then… the skills… it’s all about trial and errors. It’s much easier if you first ensure that all your antennas are well-tilted, to avoid too much overlap and overshooting.

— HSH & MKT :

1×1 or 1×3, which one gives the best utilisation ? Well, it’s about the same !!
30 freq in 1×1, with load = 12% –> 3.6 TRX / cell max
3 x 10 freq in 1×3, with load = 30%
–> 3.3 TRX / cell max

The main question is about your radio design:
large overlaps, heterogeneous terrain, hills, overshooting, reflections, high antennas –> prefer 1×3

sharp cell coverages, good downtilt, homogeneous terrain, regular inter-site distance, regular antenna azimuths –> you can use 1×1.

The better is 1×1, because it shares ALL frequencies at once. So any improvement on the radio design gives great results immediately, in terms of QoS and capacity. Also, it is easier to manage after a while.