How paging is handled during TA update ?

Question

UE is in TA 1 and moving towards TA2, before TA2 update ue got paging in TA1 but ue is already moved to TA2 and not yet updated to MME. But problem here is MME will send paging to TA1 because last updated TA is TA1. Then how UE receives paging and is there any other handling mechanism .

Answer 1

If UE is changing tracking areas & TAU is not happened yet to inform MME about last location,
If Paging comes, UE is not able to receive it. In this case proper TAC planning is very important to handle this kind of situation.
It will be handled by TAC dimensioning .
TA planning is the task of configuring TAs and TA lists so that area with excessive TA updates signaling are avoided
.The process of TA dimensioning contains two main tasks:
• TA dimensioning for the MME
• TA dimensioning for the eNode
It contains several other data & calculations as well like MME & eNB paging capacity, CPU load, PDCCH load etc.