LTE: What is the back-off indicator ? Is there any significance of this for an UE ?

Question

I don't know the complete use of CQI at eNodeB. Does it impact only downlink scheduling parameters or also considered while granting uplink resources ?

Answer 1

at times where eNB suffers from lot of traffic,at that instance if a new UE sends a preamble but enb cant give any resources then eNB ask the UE to perform the RACHing after some time.this is informed to the UE in the form of Back off indicator.based on it UE has to wait for next RAChing procedure

Comments

what is that Information element message in which eNb informs UE about back off indicator

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It must be SIB-2; not sure, someone can confirm..

Answer 2

Back-Off indicator field indicates time delay between PRACH and next PRACH.
Based on the value received in back-off indicator sub header field, UE performs random access procedure.