[Fresh Opt]

Thanks Pix,
We need second TRX in PGSM because of SDCCH (it wont work with G1). The indicator for EGSM users is in RNO, yes. The network design is not good but it’s not bad too. The amount of interference is bad, yes, mainly from other illegal operaters from outside. Our country is small and every operator from neighbours is present. The whole band 1 to 124 is impacted.
Regards,

[Pix]

Thanks for the details. If you need more help, please let me know.

You are right then, to use a lot of frequencies in your MA lists. If you remove frequencies from the second TRX, there is a risk to decrease the QoS as well.

The radio load thresholds I gave are fine for “non-interfered” network. I don’t think they apply anymore in your case.

[Abdullah khan]

What is MAIO? Why we use MAIO? AND What is hopping frequency ?
and how MAIO and hopping frequency are related?

[Vas]

I really can’t understand what is MAIO,HSN,MA.How to apply them?Give me plss example for MAIO inplementation and realisation.

[Ali]

If i have same Ma list for all sectors and using 1*1 freq how do we plan maio

[pix]

hi,

allocate the MAIO in a “circle” fashion, incrementing the maio +1 from one sector to the next.

example:

s1 trx1 = 0
s2 trx1 = 1
s3 trx1 = 2

s1 trx2 = 3
s2 trx2 = 4
s3 trx2 = 5

s1 trx3 = 6
s2 trx3 = 7
s3 trx3 = 8

etc…

Regards

pix

[Lemaure]

i think the choice of TRX MAIO depends on the nature of your malist
if the frequencies of the malist are consecutive, the MAIO should have a difference of 2 to avoid adjacent interferences. so the allocation should be

s1 trx1 = 0
s2 trx1 = 2
s3 trx1 = 4

s1 trx2 = 6
s2 trx2 = 8
s3 trx2 = 10

s1 trx3 = 12
s2 trx3 = 14
s3 trx3 = 16

also remember that your MAIO should not go above N-1 (N: number of frequencies in the MALIST)

[pix]

hi lemaure,

-> you’re right 🙂 step of “2” to avoid adj ch interference.

Apologies for my mistake !

Regards,

pix

[Ali]

Thanks i have below MAl list
1,2,3,4,5,6,7,8,9,10,11,12
Configuration is 2/2/2 i have to plan Maio for it, plz suggest

[Lemaure]

s1,2,3 trx0: nonhopping

s1 trx1 = 0
s2 trx1 = 2
s3 trx1 = 4

s1 trx2 = 6
s2 trx2 = 8
s3 trx2 = 10

[Lemaure]

Noticed that with this MALIST you can’t go above the MAIO 10 because the MAIO 12 is EQUAL to MAIO 0. So this MALIST is made for not more than 6TRX on a site. In case of high traffic on a sector you either push out the traffic (parameters optimisation)or do a whitelist on a low traffic sector of the same site(from 2==>1 TRX).

[pix]

Hi,

It’s just 2/2/2 configuration, not 3/3/3, so your 1st part was enough :

s1,2,3 trx0: nonhopping

s1 trx1 = 0
s2 trx1 = 2
s3 trx1 = 4

By the way,

you’re having 3 hopping TRX on this site, and a MA list of 12 ARFCN.

So that gives a RF load of 3/12=25%, which is quite high (typical target is below 20%). If neighbours are nearby (urban area), then you can expect high interference during Busy Hour, when the second TRXs are loaded to 100%.

If site is located in a rural area, then it should be fine.

Regards,
pix

[Lemaure]

that’s right Pix. you should really have a low traffic network to ensure good quality with this short MALIST. But if it’s just an umbrella layer i thnk it can still work.

[RF]

Hi pix,

we have 17 freq in MA list..
Can i use 1 x 3 Freq plan???
please reply earlier…i want to implement in my network asap

[kheang]

If we have 8 TRX in sector 1. we assign MAIO 0,4,12,14,18 in TRX. for the TRX doesn’t assign MAIO will hopping or not ? or do we need to assign MAIO for all TRX to get FH ?

[Author]

Posts