Friday, July 6, 2018

RRC state Machine in 5G 38.331

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A UE is either in RRC_CONNECTED state or in RRC_INACTIVE state when an RRC connection has been established. If this is not the case, i....
Monday, March 12, 2018

SIB for Handovers

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From To Mandatory SIB's Optiional SIB's LTE LTE SIB1 SIB2 SI...
Friday, February 16, 2018

RACH Procedure

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RACH Procedure Flow 1. RRC Layer sends Access Req for RRC Connection Request/RRC Coonection Re-establishment Request to MAC and starts T3...
1 comment:
Sunday, January 14, 2018

VOLTE VOIP IMS SIP CSFB

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Often people are confused between VOLTE ,VOIP, IMS , SIP and CSFB. To be clear between all this item lets explain them and understand one ...
3 comments:
Monday, January 8, 2018

SRVCC Failure

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What happens when SRVCC fails at the NW side? How UE is notified about it and the action it should take? Notification Procedure (ESM Pro...
Thursday, December 28, 2017

Cell Acquisition - Camping On LTE

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Now to initiate a registration UE do need to aquire MIB and SIB1 and SIB2, which in technical term we say as Initial Acquisition - in order...
Monday, May 30, 2016

[LTE] [NAS] Attach Attempt Counter - Reset

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An attach attempt counter is used to limit the number of subsequently rejected attach attempts. The attach attempt counter shall be increme...
Saturday, May 28, 2016

Attach Procedure 23.401 V 13.6.1

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Local IP Access (LIPA) function

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The LIPA function enables an IP capable UE connected via a HeNB to access other IP capable entities in the same residential/enterprise IP n...

Selected IP Traffic Offload (SIPTO)

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The SIPTO function enables an operator to offload certain types of traffic at a network node close to that UE's point of attachment to ...