Parameter Tuning — RRC Timers, RACH Config & UE Power

RAN
, ,
1

Parameter Tuning — RRC Timers, RACH Config & UE Power

:gear: Parameter Tuning in LTE/5G RAN

Small parameter changes can have a significant impact on accessibility, coverage, interference and user experience.

This infographic covers:
:small_blue_diamond: RRC Timers & state transitions
:small_blue_diamond: RACH/PRACH configuration
:small_blue_diamond: UE Power Control
:small_blue_diamond: Tuning impact & best practices
:small_blue_diamond: Important KPIs to monitor
:small_blue_diamond: Optimization goals

image
image1587×810 207 KB

image
image1584×651 152 KB

image
image1574×599 152 KB

image
image946×259 49 KB

image
image598×253 35.9 KB

:bullseye: Optimization Goal:

Better accessibility + stable connections + good coverage + controlled interference.
Save it for your LTE/5G optimization & interview preparation.

LinkedIn: :backhand_index_pointing_down:

2

Some RRC timers may be configured at the eNB level, so changing them could affect multiple cells. If the degradation is cell-specific, we should be careful before applying a timer change across the whole node.

Regarding P0 and Alpha, increasing them can increase UE UL transmit power and potentially raise UL interference. Therefore, Alpha should be tuned gradually based on the interference environment and coverage requirements.

For PRACH, the preamble format and configuration index should be selected according to the cell coverage/radius and deployment scenario to ensure reliable random access performance.