DL information transfer

Downlink transfer of dedicated NAS information

Signalling radio bearer: SRB2 or SRB1

RLC-SAP: AM

Logical channel: DCCH

Direction: E-UTRAN -> UE

• The purpose of this procedure is to transfer NAS or (tunneled) non-3GPP dedicated information from E-UTRAN to a UE in RRC_CONNECTED.
• E-UTRAN initiates the DL information transfer procedure whenever there is a need to transfer NAS or non-3GPP dedicated information. E-UTRAN initiates the DL information transfer procedure by sending the DLInformationTransfer message.
• In DLInformationTransfer message, dedicatedInfoType is carry dedicatedInfoNAS or dedicatedInfoCDMA2000-1XRTT
• Upon receiving DLInformationTransfer message, the UE shall forward dedicatedInfoNAS or dedicatedInfoCDMA2000-1XRTT to the NAS upper layers or CDMA2000 upper layers;
•  Either SRB2 or SRB1 (only if SRB2 not established yet) is used. If SRB2 is suspended, E-UTRAN does not send this message until SRB2 is resumed

DL_DCCH: dlInformationTransfer; NAS EMM: Authentication request

Value DL_DCCH_Message:= {                    

              Message c1: dlInformationTransfer: {                     

                rrc_TransactionIdentifier 2,                       

                CriticalExtensions c1: dlInformationTransfer_r8: {                      

                  dedicatedInfoType dedicatedInfoNAS : ‘075200BF7E71E2CF9358FB41145236A814F61A10FB89E7A41C14F24C64DA41F437896652’H                       

                }                 

              }                   

            }

DlInformationTransfer-r8

dedicatedInfoType: dedicatedInfoNAS (0)
dedicatedInfoNAS: 07 52 00 3A 6A 41 84 BC D9 15 D9 BD 55 61 FB E3 D6 81 03 10 DD 66 80 39 E6 3C 80 01 44 B7 EC F3 C5 F3 FC 4C

Protocol discriminator: 7 (EMM)
Message Type : Authentication Request
Message Contents :