Can PSM timers be dynamically set?


  • “T3324” is the timer for the PSM Activity Timer (how long the Idle Mode lasts before PSM mode is started). It depends of the device request, i.e. if the device requests 10s than MME accepts since the activation of dynamic PSM.

    “T3412” is the timer for the Long Periodic TAU (how long the UE can stay ATTACHed before the packet core releases the session. This value is currently set to 310 hours default. The UE may request a value, but currently this is overwritten by the network default. This behavior will change in the future.

    Both as dynamic PSM AT and dynamic LP-TAU will allow to retain the values proposed by UE.


 

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