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pix - 7th June 2013  (19:50 GMT)


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


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




Ali - 7th June 2013  (16:33 GMT)

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

Vas - 16th March 2011  (13:28 GMT)

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

Abdullah khan - 25th April 2010  (13:40 GMT)

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

Pix - 27th May 2009  (09:13 GMT)

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.

Fresh Opt - 27th May 2009  (06:15 GMT)

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.

Pix - 26th May 2009  (17:55 GMT)

Yes, in B10, you can mix. You can't in B9 ? I thought you could.

Since your BCCH is already PGSM, you don't need a second TRX with pure PGSM frequencies. The amount of old MS must be very small.
There is an indicator that can give you the ratio of EGSM MS in your network (I'll give you the name tomorrow... but you can find it in RNO by searching "EGSM" :)) )

Just one question : why do you need more than 42 BCCH freq ?? Is your network design really terrible ? The amount of interference is that bad ??

Fresh Opt - 26th May 2009  (06:56 GMT)

Thanks Pix million times.
We use different frequencies for TRX2 because of old phones supporting PGSM and for TRX3&TRX4 G1 because of interference of other operaters in PGSM. We thought that's optimal solution satisfying costumers with old phones and avoid somehow intererence. We use B9, upgrading in B10 can we mix G1+PGSM? You're right, there is to much overlaps and we are working on it.

Pix - 26th May 2009  (06:24 GMT)

Yeah, i'll try to answer.

Why there are different frequencies for TRX 2 and TRX 3&4 ? Is it really a good choice ?
--> No.

Why did you do something like this ?
--> Probably because it is not possible to mix G1 and PGSM frequencies in same TRX ?

Are you sure ??? Upgrade your release software and enjoy the benefits of mixed PGSM + G1 hopping list.
--> Ok, will do.

Is this 1x1 or 1x3? 1x1 means all cells of same BTS use the SAME frequencies lists. 1x3 means each cell is using only one third of the total band. (each cell has different MA list than it's co-BTS sisters)

Now, for TRX2, you have 15 frequencies. The radio load is then:
1/15 = 6.7%.
Theoretically, you should be fine as long as load < 12%. So you could use only 8 frequencies.
On top of that, i assume the second trx is not 100% busy at busy hour... is it ? If it's only 80% busy, then multiply your load by 0.8. And adjust the nb of frequencies accordingly.

For TRX3 and 4:
48 frequencies.
2/48 = 4.1%.
Here again, you are way below the std load. Means you are wasting frequencies.

HOWEVER, since you need more than 42 BCCH, I'm afraid you have a very poor antenna design, a lot of overlaps, not enough downtilt, too much overshooting, and so on.

So forget about the standard thresholds (12% for 1x1, and about 30% for 1x3), and use your own in order to ensure good QoS in each TRX.

And really, try to group all G1 and PGSM frequencies :) Life = easier, hopping = more efficient.

Fresh Opt - 25th May 2009  (21:26 GMT)

Hi again,
any idea about the configuration I described on 13 May. Please!

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