dlInformationTransfer
Direction: eNB => UE
Signalling Radio Bearer: SRB2 or SRB1
RLC Mode: AM
Logical Channel: DCCH
Transport Channel: DL-SCH
eNB sends dlInformationTransfer procedure to transfer NAS or non-3GPP dedicated information.
It uses either SRB1 (if SRB2 is not established) or SRB2.
The IE “dedicatedInfoType” will carry “dedicatedInfoNAS” or “dedicatedInfoCDMA2000-1XRTT” or “dedicatedInfoCDMA2000-HRPD” depending upon the type of information it needs to send.
DL_DCCH: dlInformationTransfer; NAS EMM: Authentication request
Value DL_DCCH_Message:= {
Message c1: dlInformationTransfer: {
rrc_TransactionIdentifier 2,
CriticalExtensions c1: dlInformationTransfer_r8: {
dedicatedInfoType dedicatedInfoNAS : 'ERTYU42387793479NSDKHFA98234KSJFNLAJKES'
}
}
}dlInformationTransfer is used to send “EMM: Authentication Request” and “EMM: Security Mode Command”
ulInformationTransfer
Direction: UE => eNB
Signalling Radio Bearer: SRB1 or SRB2
RLC Mode: AM
Logical Channel: DCCH
Transport Channel: UL-SCH
UE in RRC connected mode sends ulInformationTransfer procedure to transfer NAS or non-3GPP dedicated information.
It uses either SRB1 (if SRB2 is not established) or SRB2.
The IE “dedicatedInfoType” will carry “dedicatedInfoNAS” or “dedicatedInfoCDMA2000-1XRTT” or “dedicatedInfoCDMA2000-HRPD” depending upon the type of information it needs to send.
rb: 33; UL_DCCH: ulInformationTransfer; EPS: [ciphered]
Value UL_DCCH_Message:= {
Message c1: ulInformationTransfer: {
CriticalExtensions c1: ulInformationTransfer_r8: {
DedicatedInfoType dedicatedInfoNAS: ‘354657SADF78WWERJKA7FSDAKHAE798'
}
}
} dlInformationTransfer is used to send “EMM: Authentication Response” and “EMM: Security Mode Complete”
DirectTransfer
UE will send Attach Complete as a Direct transfer message to eNB.
AttachComplete will be present in “DedeicatedInforNAS” IE.