formula to calculate PCI at LTE

[Jose1975]

Hi guys, does anybody know which is the formula that is used to calculate PCI in an LTE TDD Network ????
thanks in advanced.

[Mali_TR]

Hi

physicalLayerCellIdGroup x 3 + physicalLayerSubCellId = PCI

bR,

[Jose1975]

Hi

physicalLayerCellIdGroup x 3 + physicalLayerSubCellId = PCI

bR,

thank you mate the only doubt that I have is what do I need to do in order to know what is the physicalLayerCellIdGroup and what is the physicalLayerSubcellId??? how to find out what is the correct value to input in the formula.

[rfah96]

For E// you can find physicalLayerCellIdGroup and physicalLayerSubCellId(=sector number) in EUtranCellFDD MO.

For Huawei, I haven't seen a group parameter, it is kind of a logical value. 3*PSS+SSS, If PCI is 301 then, group value is 100 and SSS=localcellid=1.

For finding new PCI value, check neighbor group values, find least frequently used and far group value and assign to the enodeb.

[Ghost78]

Dear Jose1975;

you question is not understood, what do you exactly want, planning a new PCI, or how to exctract physicalLayerCellIdGroup/physicalLayerSubcellId from a given PCI or the opposite, explain more to be able to give the adequate answer.

B.R

[Jose1975]

Dear Ghost 78 let me explain you what happened is that I am working for a new company and the thing is that when I started here in this new job the PCI values where already assigned for example for ENonB 1 the PCI values are 100, 101 and 102 my question is how to get these values with the formula 3*PSS+SSS I am a newbie in LTE. and by the way I forgot to mention that I work with LTE TDD.

[Ghost78]

hi;

now It's clear; use excel to get them from PCI value.
SSS=mod(PCI,3)
PSS=int(PCI/3)

let's proceed with some examples:
PCI=99
SSS=mod(99,3)=0
PSS=int(99/3)=33

PCI=100
SSS=mod(100,3)=1
PSS=int(100/3)=33

PCI=101
SSS=mod(101,3)=2
PSS=int(101/3)=33

and so on.

let me tell you one thing, it is recommended to have one PSS per ENODB, that's whay it is called group, for example PSS 33 gives your the PCIs 99, 100, and 101.

B.R