Abis Utilization Huawei

[paulus]

Hi all..

Is there a formula to calculate Abis utilization?

In Huawei, I just can see from the occupied TS per E1..

Is it correct :

(occupied TS/128)*100 = if 1 E1
(occupied TS/256)*100 = if 2 E1

Well, I'm not sure because when I add 1 E1, the occupied of both E1 are still the same... :confused:

Thanks

Paul

[maahsan]

Are you using flex-abis or legacy abis technique?

[paulus]

Hi,

We are using flex-abis.

Shared between 1st and 2nd E1.

Br,

Paul

[J_Ahmad]

below is the formula for calculating the idle timeslots for 16K ABIS,

=(n*32*4-(n*4+4+(x*8-BCCH-SD)+Roundup(x/2,0)*4))

where
n=number of E1s
x=Total number of TRXs in the site
B=number of total BCCH timeslots for the site for example if there are three cells in the site it would be 3
SD=Total number of SD timeslots (not count of SDs rather timeslots)

as it is evident from the formula that first part of formula n*32*4 basically calculates the total 16K timeslots available and the then remaining part calcultes the used timeslot and then subtracting the later from the former can give you unused timeslots which can be configured as IDLE timeslots.

[gogotchiya83]

Dear Experts,
Some cell in my network suffer from a huge Abis congestion (80%) otherwise the CSSR is very good (>99%), how you can explain that? (we use Flex Abis)

[khurrambilal01]

Hi Gogotchiya83,
In Flex abis, by default Pre-emption is enabled which means Voice has priority over data thus, any new voice call Pre-empts data timeslot if ABIS media is fully congested so in any case voice is unaffected and data timeslots are reduced when there is ABIS congestion.

[hilman]

Thanks for this posting

[jayk]

Hi J_Ahmed, I could not understand the subtraction of "BCCH and SD and Roundup thing". Please explain that in details. How do PDCH are considered in this formula?


below is the formula for calculating the idle timeslots for 16K ABIS,

=(n*32*4-(n*4+4+(x*8-BCCH-SD)+Roundup(x/2,0)*4))

where
n=number of E1s
x=Total number of TRXs in the site
B=number of total BCCH timeslots for the site for example if there are three cells in the site it would be 3
SD=Total number of SD timeslots (not count of SDs rather timeslots)

as it is evident from the formula that first part of formula n*32*4 basically calculates the total 16K timeslots available and the then remaining part calcultes the used timeslot and then subtracting the later from the former can give you unused timeslots which can be configured as IDLE timeslots.