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# frequency planning

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Guest

wat is 1X1, 1X2 etc in Frequency planning.. need help

Dimitar Kesov
Guest

hi, is this frequency planning for mobile network?

tufail
Guest

hi dimitar

yes it is frequency planning for GSM 900

n i think it is know as Ad hoc

thanks n regrds
tufail

Guest

hi all
can anybody let me know wat is 1*1, 1*2… in frequency planning of mobile n/w.

thanks

sdcch
Guest

i think it means concept of frequency planing in case of frequency hopping, for example 1×1 means that on every cells in area there is one set of frequencies (MA) on TCH DRXs. Of course,BCCH layer is ‘clear’.

tufail
Guest

can u tell me how many frequecies i need for 444 site for SFH using 1×1 tech.
and also can u let me know abt wat is 1×2 in SFH.

thanx n regards
tufail

Boko
Guest

You don’t have to care about the number of sites/sectors but for the number of TRX’s per sector.
Then you choose 1×3 or 1×1. 1×2 sounds strange although we use it in the micro layer.

jood
Guest

Generally the best # of freq (hopping set) to encounter any fading & average them over sufficient BW is 15 freq.
— Cuz 15 freq = 200 kHz x 15 = (3 MHz).
3 MHz is bigger than the coherence fading of outdoor & in car environment.
But it’s not sufficient for indoor environment. Its it???.

Guest

thanks guys for ur help.

i was thinking tht
1×3 is one MA list for one sector n hence 3 for 3 sectors.

regarding no. of frequecies

i was thinking of it is % of channel occupancy tht need to be

yrrah
Guest

Hi TUFAIL,
you are limited to a number of frequencies not to go under by the Frequency Load (FL).
the FL is computed as follows:
[(Nb of hopping TRX)/(Nb of frequencies in the hopping list)]*[Traffic/(Nb of voice available TCH)].
The thresolds are the following:
FL < 30% for 1*3 reuse pattern FL < 8% for 1*1 reuse pattern. In a previous message, you talk about ad hoc. Do you ahve any info about that, because i'm now facing problems with my network and i heard it could help a lot. Regards

Guest

thanks YRRAH
tthis is a valuable information for your part.
can you tell me how it is impklemented on Nokia systems.

can you tell me more about this system, if you hav got material that can provide me with better knowledge abot this issu.

My email ID is Tufial@gmail.com, can i hav ur email ID.

YRRAH i am really sorry about Ad Hoc i really dont know anthing abt that.

i 2 was searching for ad hoc but no one talked abt that.

thanx n regards
tufail

hashem
Guest

hi
i am new on cell planner and can not do an automatic neighbor plan on my tool
can you help abut that
Best Regards

Hashem.M.Hali

Viewing 12 posts - 1 through 12 (of 12 total)
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