Smart RAC

[eritelecom]

in smart RAC, the "maxGbrTrafficLimit" defines the maximum limit of PRB consumed by GBR ERABs ?

[ajay_msfather]

maxGbrTrafficLimit

Specifies the limit in % of available radio resources. Reaching the resource - limit ARP based pre-emption is triggered. If pre-empted DRBs are available the new bearer may be admitted, otherwise it is rejected.

Example: 10Mhz - system => 50 PRBs, maxGbrTrafficLimit is set to 70%, which leads to a threshold of 35 PRBs. The remaining 15 PRBs are reserved for HO traffic and non-GBR traffic and spare in case of bad radio conditions of certain UEs.

Resources with respect to signalling bearers, active UEs and numbers of DRBs per cell are still checked using counters and configured thresholds. For GBR traffic a forecast calculation on needed resources for a new bearer is done and if there are enough resources left in the cell the new admission request is admitted, Continuously the radio resource consumption is measured and admission decisions take the measurements as base for any decision,

This feature is only for GBR service .