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LTE - quick bits on Mobility

LTE - quick bits on Mobility [Under LTE]
» E-UTRA and E-UTRAN overall description - 36.300, Rel 8 «
» E-UTRAN access - 23.401, Rel 8 «
» NAS - 24.301, Rel 8 «
» RRC - 36.331, Rel 8 «


RRC_CONNECTED

lte-connected-mobility-756718.png

Cell level
RRC Handover (hard)
Network initiated
36.300:10.1.2.1
36.331:5.3.1.3, 5.3.5.4

UE eNBs
Measurements configured

Measurement reports new-right4.JPG

new-left4.JPG RRC Reconfig
from current cell
(with mobility control info)

new-left4.JPG DL/UL synchronisation
with new cell
new-right4.JPG
Non-contention based random access

RRC Reconfig complete
to new cell
new-right4.JPG

new-left4.JPG Data transfer new-right4.JPG



RRC_IDLE

lte-idle-mobility-757909.png

Tracking area level
EMM TA Update
UE initiated
23.401:5.3.3
24.301:5.5.3

UE eNBs
Cell re-selection, TA change*

new-left4.JPG RRC Connection Setup
(TAU request)
new-right4.JPG
RRC → CONNECTED

new-left4.JPG TAU Accept

Refer article UE states (TAU) further.


* refer 23.401:5.3.3.0 for other TA triggers.


Copyright © Samir Amberkar 2010-12§

LTE - UE States (Detach) « LTE Index .