@startuml "TD_VxLTE_EMC_INT_DTC_01.png"
!include etsi-style.iuml
!pragma teoz true
'
'Figure : UE Emergency Initiated Network Detachment (with/without Emergency Registration) 
'
''title Figure : UE Emergency Initiated Network Detachment (with/without Emergency Registration) 
'
participant "UE A"
box "EPC A" #LightBlue
  participant MME
  participant PGw
  participant PCRF
end box
box "IMS A" #LightBlue
	participant "P-CSCF"
	participant "HSS"
end box

rnote   right  "UE A"      : Gm
& rnote right  "PGw"       : Gx
& rnote right  "PCRF"      : Rx

'
rnote over "UE A", PGw  #FFAAAA: Detachment triggered
"UE A"     -->   "MME"    : Emergency Bearer\n Release Event
"PGw"      ->    "PCRF"   : CCR
"PCRF"     ->    "PGw"    : CCA
"MME"      -->   "UE A"   : Emergency Bearer\n Relased
@enduml