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LTE: What is the difference between CellReselPriority and ConnFreqPriority?

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Can anyone please explain these two terms in LTE network its defined under GERANNFREQGROUP properties - CellReselPriority and ConnFreqPriority?

posted Apr 18, 2017 by anonymous

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1 Answer

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IDLE Mode
Cellreselpriortiy- Indicates the cell reselection priority of the GERAN carrier frequency group. The value 0 indicates the lowest priority. It is contained in system information block type 7 (SIB7). The UE decides whether to reselect a neighboring cell on a frequency in the GERAN carrier frequency group based on the value of this parameter and the absolute priority of the serving cell. If the value of this parameter is larger than the absolute priority of the serving cell, the UE starts measurements on neighboring cells on the frequencies in the GERAN carrier frequency group; then if the signal quality of some neighboring cells meets the related conditions, the UE starts cell reselection. If the value of this parameter is smaller than the absolute priority of the serving cell, the UE starts the measurements only when the signal quality of the serving cell is poor; then if the signal quality of some neighboring cells meets the related conditions, the UE starts cell reselection. Frequencies used for different RATs must be assigned different cell reselection priorities.
A larger value of this parameter results in a higher probability of starting measurement on neighboring cells on a frequency in the GERAN carrier frequency group and a higher probability of reselection to a cell on the frequency. A smaller value results in the opposite effects.

Connected mode
Connfreqpriority-Indicates the frequency group priority used in selecting target groups for blind redirection and in delivering groups to measure. During blind redirection, if no neighboring cell has been configured to be suitable for blind handovers, the eNodeB selects a target frequency group based on the priorities specified by this parameter. If this parameter is set to 0 for a group, the eNodeB does not select this group for blind redirection. During measurement configuration, the eNodeB preferentially delivers the frequency group with the highest priority specified by this parameter. The larger the parameter value, the higher the priority level.

answer May 21, 2017 by Eray Madrid
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