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When eNB sends RRC Connection Release with "IdleMode Mobility Control Info IE"???

+2 votes
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Please can anyone explain me,
In which Scenario, eNB send Idlemodemobilitycontrolinfo IE with release cause "other" inside RRC CONNECTION RELEASE message to UE???

posted Aug 14, 2018 by Hamesh Raja M A

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1 Answer

+2 votes

The purpose of including this IE in RRC connection release message is to configure the cell re-selection parameters applicable in the Idle mode. These cell re-selection parameters would be different from the one broad-casted in system information block. Enodes decides on inclusion of "IdleMode Mobility Control Info" IE based on "Subscriber Profile ID for RAT/Frequency Priority" (optional) IE receives from MME. There are couple of messages in S1-AP interface which may carry this information from MME to eNodeB.
In case, "IdleMode Mobility Control Info" IE is not configured for the Idle mode, UE selects the broadcast-ed one.

answer Aug 14, 2018 by Vimal Kumar Mishra
Also in case of CSFB, Inter-RAT cell information will be used for fast camping.
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