SFH planning

[aquatic]

dear frens,
i have 25 900MHz frequency, and i need to plan the SFH, as i planned SFH1x1 with 12 BCCH and 12 TCH frequency, i got the MAIO plannig problem as i cannot have more MAIO than the hopping frequency, as some site have more than 10 TRX running currently.

can i go for staggered bcch and tch plan or there is some other ways to plan....

please help.......

[RF engineer]

dear frens,
i have 25 900MHz frequency, and i need to plan the SFH, as i planned SFH1x1 with 12 BCCH and 12 TCH frequency, i got the MAIO plannig problem as i cannot have more MAIO than the hopping frequency, as some site have more than 10 TRX running currently.

can i go for staggered bcch and tch plan or there is some other ways to plan....

please help.......

These sites are inside city or outside city if it is outside do BBH if not you have to do BBH hopping all over the netwrok and inside city go ahead with your SFH plan .
BR

[aquatic]

the site is in the city but small with 20 sites....and we are trailing the sfh.... and 3-4 cells have upto 72 erl traffic in busy hour...

thanks for the suggestion

[danikd]

the site is in the city but small with 20 sites....and we are trailing the sfh.... and 3-4 cells have upto 72 erl traffic in busy hour...

thanks for the suggestion

The best possible solution for you is go for SFH Ad-Hoc frequency allocation.
It seems that you have pretty loaded network with high level of traffic.

Just for your knowledge - SFH 1x1 (or 1x3) reuse is good for new networks or networks with very low traffic level.

If you need more explanations about SFH ad-hoc I can help you with explanations.

[RF engineer]

the site is in the city but small with 20 sites....and we are trailing the sfh.... and 3-4 cells have upto 72 erl traffic in busy hour...

thanks for the suggestion

In my opinion go on BBH or MRP frequency plan

[aquatic]

The best possible solution for you is go for SFH Ad-Hoc frequency allocation.
It seems that you have pretty loaded network with high level of traffic.

Just for your knowledge - SFH 1x1 (or 1x3) reuse is good for new networks or networks with very low traffic level.

If you need more explanations about SFH ad-hoc I can help you with explanations.

i will be greatful if u explain about the ad-hoc planning.....

[danikd]

In my opinion go on BBH or MRP frequency plan

BBH can be used once you have 3-4 TRXs per sector and if you have no HW limitations like EDGE compatible/incompatible TRXs mix within the sector.
Once EDGE implemented, then you should be sure that all TRXs support EDGE in order to go for BBH.

In any case BBH or SFH Ad-hoc - you have to go with good AFP tool and reliable process of Interference Matrix creation (Measurements reporting based).

[aquatic]

The best possible solution for you is go for SFH Ad-Hoc frequency allocation.
It seems that you have pretty loaded network with high level of traffic.

Just for your knowledge - SFH 1x1 (or 1x3) reuse is good for new networks or networks with very low traffic level.

If you need more explanations about SFH ad-hoc I can help you with explanations.

i will be greatful if u explain about the ad-hoc planning.....

[s52d]

dear frens,
i have 25 900MHz frequency, and i need to plan the SFH, as i planned SFH1x1 with 12 BCCH and 12 TCH frequency, i got the MAIO plannig problem as i cannot have more MAIO than the hopping frequency, as some site have more than 10 TRX running currently.

can i go for staggered bcch and tch plan or there is some other ways to plan....

please help.......

Hi!

25 is quite low number...
Assuming your over 10 TRX per site is 11 TRX (say, 3+4+4 is your max site), you migh try
with lower number of BCCH (9 can do in small city, others are used outside) and try with
allocating 3 TCH frequencies per cell, with one from former BCCH band.
with those 3: use only one or max two adjacent per site, for example:
sec1: 1 6 12 +BCCH
sec2: 3 8 13 +BCCH
sec3: 5 10 15 + BCCH
another close site:
sec1: 2 7 16 +BCCH (of course, BCCH 17 and 18 are not used in this site)
sec2:4 9 15 +BCCH
sec3:6 11 13 +BCCH
consider using BB hoping in cells with 4 TRXes, so you include BCCH in hopping.
try to use no pattern (called NPR, No pattern reuse); try to load all frequencies equally.

Look at it as 1:1 in one moment, then you remove some frequencies in cells that overlap heavily,
then you use same frequencies from cells on same sate (as MAIO does),
then you limit use of adjacent frequencies on same site (uplink quality).

BR
s52d


Do not expect high quality: for this you need at least 40 frequencies ;-)

BR
S52d

[ashraferto]

I already post a document in the below thread, hope it will be useful for you:

Document for Frequency Hopping

Thanks