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hi all
please any one can advice me about the CIO parameter setting , why the default value is 0 , and when I need to change it .
I know that it affect the drop rate , but I need to know under which conditions it will ?
thanks
Im not also familiar with this parameter, but as someone hinted to me, CIO is a 3G handover parameter. The higher the CIO,the earlier it will handover to neighbor cell, therefore the lesser the chance of call drop because of handover failure. Im not even 1% sure if my argument is correct. Comments pls.
Hi,
Definition (copied from doc)
The offset is added to the measured quantity before the UE evaluates whether an event has occurred. Improper use of non-default values may result in instability and unequal cell borders.By applying a positive offset, the UE sends a MEASUREMENT REPORT message back to the SRNC as if the measured value is offset higher than reality. By applying a negative offset, the UE considers the measured value to be offset lower than reality at event evaluation.
Range:
-10 dB (late detection) –> 10 dB (early detection)Default:
0 dBResolution:
0.5 dBScope
CellHi, I want to understand, what are the conditions other than Cell Unavailability, for a Cell, that triggers the counter to peg under Category of Drop due to Unmonitored Neighbors.In simple understanding, can anyone share the reasons of drop due to unmonitored neighbors.
Thanks
Sachin
Hi, you can change de CIO (Cell Individual Offset) when you want perform HO easier, while greater CIO value is easier the HandOver to target Cell.
why I need to add an offset value ?
what is the important of this value ?Why CIO is not required for inter rat handover?
An offset is allocated for each cell being monitored. The offset can be
positive or negative. Before the UE judges whether an event occurs,
adds the offset to the measurement result. If the PCPICH uses a positive
offset, the UE sends the measurement report just like PCPICH is
x dB better than the actual case. Or, if the PCPICH uses a negative
offset, the PCPICH report is limited.(((((((((((((((((( When the cell individual offset is used, the corresponding cell is possibly (at least temporarily) the target cell of the handover or removed from the active set.))))))))))))))))))
It means that this value (calculated based on CIO settings) is reported to the neighbors by the SRNC and then the neighbors give priority to this cell on basis of the final value.
