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LTE: When does an eNodeB issues RRC Connection Release message towards an UE ?

+1 vote
LTE: When does an eNodeB issues RRC Connection Release message towards an UE ?
posted Aug 17, 2015 by Vikram Singh

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2 Answers

+1 vote

There are several reasons for an RRC connection releases to be sent by the eNB to the UE. Among them:

1) Expiration of the inactivity time( about 10 secs)
2) As a result of a drop call of some sort
3) In case of a tracking area update
4) During a Detach

answer Aug 17, 2015 by Avigdor Ne'eman
In addition to Avigdor's answer -
RRC connection is also released is case of CS fallback.
0 votes

Following are the reasons:

  • Expiration of the inactivity timer
  • RLF observed at eNB
  • loadBalancingTAU required
  • Detach Procedure
  • UE initiated/terminated CS-Fallback
answer Dec 1, 2020 by Manje Gowda K.r.
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+1 vote

I saw RRC Connection Reject message in specification. There is an IE "deprioritisationReq" within the RRCConnectionReject message. I want to know when eNodeB includes this IE while rejecting a rrc connection request for an UE.

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During attach procedure, UE sends "Attach Request" along with "RRC Connection Setup Complete", eNodeB sends "Attach Accept" along with "RRC Connection Reconfiguration then why UE does not send "Attach Complete" along with "RRC Connection Reconfiguration Complete" message ? What could be the reason for defining the messages so ?

+4 votes

Can someone please explain about the cause "loadBalancingTAUrequired" ?

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