Home » Topics » Telecom Design » GSM/KPI

pc Guest

How calculate the TCH accessibility.

Pc Guest

How to calculate the TCH accessibility.pls help me any body.
thank you.

Bijoy Guest

Pc Guest

Mak Guest

In my point of view TCH accessibility is directly proportional to TCH blocking. As you improve the TCH blocking your TCH accessibility will improve

pc Guest

Hi Mak
Is there any equation to calculate the TCH blocking for ZTE

Paras Guest

Hi,
Formula for TCH blocking is :
number of TCH seizure failure * 100 / number of TCH seizure attempt

Akramots Guest

Hi all,
It is not 100% true.
There could be losses not only due to blocking (SDCCH, TCH, ABIS, A …) but also due to HW failure. For example: in case of cross connected Antennas between sectors, or one of TRX could be damaged.

Paras Guest

Hi Akramots,

that’s true, failure can be due to various reasons, but all these will come in failure part
the formula i have given is a general formula

k. srinivasa Raju Guest

Hi, Please give me tips for improving sd drop. ( Here we are using NOKIA system ) Mainly for overshooting cells what whould be the parameters that I need to look for…

Ahmed Guest

please explain KPI in details to me?

Kamrul Hasan Guest

Prabeen Guest

Hi Srinivasa,

Is the Cells with high SD Drop a border Cell? Check out ur CRH value. Try to increase ur CRH value to 8 if not. This may reduce ur LU.

But Bijoy,

Could u explain me wat exactly is definition of TCh Blocking and SD Blocking. Wats teh difference btw Blocking, Congestion and drop.

srinivas Guest

Hi Prabeen,
Thanks for the suggestion. A small elaboration on CRH will be helpful. We use NOKIA system here and there is no results for CRF in NED..

Please suggest.

KJB Guest

Hi Sirnivas!

CRH (Cell Reselect Hysteresis),You need to search HYS in NED.

Default value is 4,Can be increases as per requirement.

BR..
KJB