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Which connections are present in lte architecture in ECM-CONNECTED, EMM_REGISTERED and RRC_CONNECTED states?

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I wanted a difference between those states.

posted Aug 23, 2016 by Sneha Maganahalli

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ECM connected : NAS Signalling is established.(SRB 1/2)

EMM registered : UE has an IP addressing, Complete EPS bearer has been established and MME knows current location of UE.

RRC_Coonected : UE Has RRC signalling bearers.(SRB 0/1)

answer Aug 23, 2016 by Jaganathan
One minor correction, SRB 0 is nothing but common channel so you can exclude  considering SRB 0 for RRC connected mode.
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