The purpose of this procedure is to:
– Establish/modify/release RBs,
– To perform Handover
– To configure/modify measurements
– NAS dedicated information may be transferred from ENB to UE.
RRC Connection Reconfiguration+ NAS : Activate Dedicated EPS Bearer Context Request
Direction: E-UTRAN => UE
Signalling Radio Bearer: SRB1
RLC Mode: AM
Logical Channel: DCCH
Transport Channel: DL-SCH
1. if this is the first RRCConnectionReconfiguration message after successful completion of the RRC Connection Re-establishment procedure:
2. re-establish PDCP for SRB2 and for all DRBs that are established, if any;
3. re-establish RLC for SRB2 and for all DRBs that are established, if any;
If RRC Connection Reconfiguration has [IE]:
1. radioResourceConfigDedicated: perform the radio resource configuration procedure.
2. dedicatedInfoNASList: forward each element of the dedicatedInfoNASList to upper layers in the same order as listed;
3. measConfig: perform the measurement configuration procedure
Fore more information check the Technical Specification: TS 36.331
RRC Connection Reconfiguration Complete:
Direction: UE => E-UTRAN
Signalling Radio Bearer: SRB1
RLC Mode: AM
Logical Channel: DCCH
Transport Channel: UL-SCH
This message is used to confirm the successful completion of RRC CONNECTION RECONFIGURATION
ulInformationTransfer DedicatedInfoNAS : AttachComplete + ESM : Activate Default EPS Bearer Context Accept
Attach Complete will be present in “ulInformationTransfer”.
Reference: 3GPP TS 36.331