Telecom Tutorials by Samir Amberkar

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 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 RRC Reconfig from current cell (with mobility control info) DL/UL synchronisation with new cell Non-contention based random access RRC Reconfig complete to new cell Data transfer

RRC_IDLE 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* RRC Connection Setup (TAU request) RRC → CONNECTED TAU Accept Refer article UE states (TAU) further. * refer 23.401:5.3.3.0 for other TA triggers.

Copyright © Samir Amberkar 2010-12

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