LTE UE Detach过程中信息交互

 注：下表所列信息交互，包含所有与eNB相关信息（ue <->eNB<->EPC）

-         UE initiate UE release

Msg Name

Entities

Comment

UL Information Transfer

UE->eNB

NAS Detach Request

UL NAS Transport

eNB->MME

NAS forwarding

DL NAS Transport

MME->eNB

NAS forwarding

DL Information Transfer

eNB->UE

NAS Detach Related

…

 

 

UE context release command

MME->eNB

UE S1AP ID pair or MME UE S1AP ID

RRC Connection Release

eNB->UE

To release UE with releaseCause

UE context release complete

eNB->MME

Confirm UE release

 

 

 

 

-         eNB initiated UE release (UE inactivity, UE lost)

 

Msg Name

Entities

Comment

UE context release request

eNB->MME

due to E-UTRAN generated reason, e.g. "User Inactivity", "Radio Connection With UE Lost"

UE context release command

MME->eNB

UE S1AP ID pair or MME UE S1AP ID

UE context release complete

eNB->MME

Confirm UE release

 

 

 

Note: UE Context Release procedure should be initiated upon reception of an UE CONTEXT RELEASE REQUEST message when the cause is different than "User Inactivity"

 

-         eNB initiated UE release (other cause)

 

Msg Name

Entities

Comment

UE context release request

eNB->MME

due to E-UTRAN generated reason, e.g. "User Inactivity", "Radio Connection With UE Lost"

DL NAS Transport

MME->eNB

NAS forwarding

DL Information Transfer

eNB->UE

NAS Detach Related

UL Information Transfer

UE->eNB

NAS Detach Request

UL NAS Transport

eNB->MME

NAS forwarding

…

 

 

UE context release command

MME->eNB

UE S1AP ID pair or MME UE S1AP ID

RRC Connection Release

eNB->UE

To release UE with releaseCause

UE context release complete

eNB->MME

Confirm UE release

 

 

 

 

- MME initiate UE release (UE Context Release procedure)

 

Msg Name

Entities

Comment

DL NAS Transport

MME->eNB

NAS forwarding

DL Information Transfer

eNB->UE

NAS Detach Related

UL Information Transfer

UE->eNB

NAS Detach Request

UL NAS Transport

eNB->MME

NAS forwarding

…

 

 

UE context release command

MME->eNB

UE S1AP ID pair or MME UE S1AP ID

RRC Connection Release

eNB->UE

To release UE with releaseCause

UE context release complete

eNB->MME

Confirm UE release

 

 

 

 

-         eNB initiated UE release (Reset, MME keep UE context)

 

Msg Name

Entities

Comment

RRC Connection Release

eNB->UE

To release UE with releaseCause