 

@startuml "TD_VoLTE_ECO_INT_REJ_02_RB.png"

 


!include etsi-style.iuml
!pragma teoz true
'
'Figure: SIP Session Establishment - Originating Leg
'
''title Figure : SIP Session Establishment - Originating Leg
'
participant "UE A"
box "EPC A" #LightBlue
  participant PGw
  participant "PCRF"
end box
box "IMS A" #LightBlue
    participant "P-CSCF"
    participant "E-CSCF"
end box
    participant "PSAP"

 

rnote right  "UE A"         : Gm
& rnote right "P-CSCF"      : Mw
& rnote right "E-CSCF"      : Mm\nMx\nMi
& rnote right "PCRF"        : Rx
& rnote right "PGw"         : Gx

 

'
"UE A"     ->   "P-CSCF"    : INVITE(urn:service:sos*)

rnote over "PCRF", PGw  #FFAAAA: Installation of Session Bearer

rnote over "P-CSCF", PSAP #FFAAAA: Emergency Session not possible 

'rnote over "UE A", PGw #FFAAAA: Removal of Session Bearer 
rnote over "PCRF", PGw  #FFAAAA: \s Removal of Session Bearer \s

"P-CSCF"   ->   "UE A"      : 380 Alternative Service
"UE A"     ->   "P-CSCF"    : ACK
@enduml