Model Coverage Tables

AGILITY currently supports the services, call flows, protocols, and interfaces in the tables below.

4G - 5G NSA Connectivity

Technology

Service

Sub Service

Procedure

Protocols

Interface

Network Elements A

Network Elements B

Technology

Service

Sub Service

Procedure

Protocols

Interface

Network Elements A

Network Elements B

4G -5G NSA

Connectivity 

 

Location-Info

Diameter

Cx

I-CSCF

HSS

4G -5G NSA

Connectivity 

 

Multimedia Authentication

Diameter

Cx

S-CSCF

HSS

4G -5G NSA

Connectivity 

 

Server-Assignment

Diameter

Cx

S-CSCF

HSS

4G -5G NSA

Connectivity 

 

User-Authorization

Diameter

Cx

I-CSCF

HSS

4G -5G NSA

Connectivity 

 

Registration-Termination

Diameter

Cx

S-CSCF

HSS

4G -5G NSA

Connectivity 

 

Push-Profile

Diameter

Cx

S-CSCF

HSS

4G -5G NSA

Connectivity 

 

Credit-Control

Diameter

Gx

PGW

PCRF

4G -5G NSA

Connectivity 

 

Re-Auth

Diameter

Gx

PGW

PCRF

4G -5G NSA

Connectivity 

 

Credit-Control

Diameter

Gy

PGW

OCS

4G -5G NSA

Connectivity 

 

Authorization Authentication(AAR/AAA)

Diameter

Rx

PCSCF

PCRF

4G -5G NSA

Connectivity 

 

Session Termination

Diameter

Rx

PCSCF

PCRF

4G -5G NSA

Connectivity 

 

Re-Auth

Diameter

Rx

PCSCF

PCRF

4G -5G NSA

Connectivity 

 

Authentication Information

Diameter

S6a/S6d

MME

HSS

4G -5G NSA

Connectivity 

 

Update Location

Diameter

S6a/S6d

MME

HSS

4G -5G NSA

Connectivity 

 

Notify

Diameter

S6a/S6d

MME

HSS

4G -5G NSA

Connectivity 

 

Cancel Location

Diameter

S6a/S6d

MME

HSS

4G -5G NSA

Connectivity 

 

Purge UE

Diameter

S6a/S6d

MME

HSS

4G -5G NSA

Connectivity 

 

Authorization Authentication(AAR/AAA)

Diameter

S6b

PGW

AAA

4G -5G NSA

Connectivity 

 

Session Termination

Diameter

S6b

PGW

AAA

4G -5G NSA

Connectivity 

 

Session Termination

Diameter

Sy

PCRF

OCS

4G -5G NSA

Connectivity 

 

Spending Limit

Diameter

Sy

PCRF

OCS

4G -5G NSA

Connectivity 

 

Notifications

Diameter

Sh

HSS

TAS

4G -5G NSA

Connectivity 

 

Profile update

Diameter

Sh

HSS

TAS

4G -5G NSA

Connectivity 

 

Subscribe Notifications

Diameter

Sh

HSS

TAS

4G -5G NSA

Connectivity 

 

Server Assignment

Diameter

Swx

HSS

AAA

4G -5G NSA

Connectivity 

 

Modify Bearer

GTPV2

S11

MME

SGW

4G -5G NSA

Connectivity 

 

Delete Session

GTPV2

S11

MME

SGW

4G -5G NSA

Connectivity 

 

Create Session

GTPV2

S11

MME

SGW

4G -5G NSA

Connectivity 

 

Modify Bearer

GTPV2

S5

SGW

PGW

4G -5G NSA

Connectivity 

 

Delete Session

GTPV2

S5

SGW

PGW

4G -5G NSA

Connectivity 

 

Create Session

GTPV2

S5

SGW

PGW

4G -5G NSA

Connectivity 

 

N1N2MessageTransfer/EBIAssignment

HTTP2

namf

SMF

AMF

4G -5G NSA

Connectivity 

 

UE Authentications/5g-aka-confirmation

HTTP2

nausf

AMF

AUSF

4G -5G NSA

Connectivity 

 

Charging Data Request/update/Release

HTTP2

nchf

SMF

CHF

4G -5G NSA

Connectivity 

 

SM Policy Control Create/Update/Delete

HTTP2

npcf

SMF

PCF

4G -5G NSA

Connectivity 

 

Sm Context Create/Update/Release

HTTP2

nsmf

AMF

SMF

4G -5G NSA

Connectivity 

 

PFCP-Session-Establishment/Deletion/Modification

PFCP

N4

SMF

UPF

4G -5G NSA

Connectivity 

 

Activate default EPS bearer context

S1AP/NAS-EPS

S1-MME

MME

UE

4G -5G NSA

Connectivity 

 

Activate dedicated EPS bearer context

S1AP/NAS-EPS

S1-MME

MME

UE

4G -5G NSA

Connectivity 

 

Attach

S1AP/NAS-EPS

S1-MME

UE

MME

4G -5G NSA

Connectivity 

 

Authentication

S1AP/NAS-EPS

S1-MME

UE

MME

4G -5G NSA

Connectivity 

 

Context Release 

S1AP

S1-MME

eNB

MME

4G -5G NSA

Connectivity 

 

Detach

S1AP/NAS-EPS

S1-MME

UE

MME

4G -5G NSA

Connectivity 

 

downlinkNASTransport

S1AP

S1-MME

MME

eNB

4G -5G NSA

Connectivity 

 

uplinkNASTransport

S1AP

S1-MME

eNB

MME

4G -5G NSA

Connectivity 

 

EMM information

S1AP/NAS-EPS

S1-MME

MME

UE

4G -5G NSA

Connectivity 

 

ESM information

S1AP/NAS-EPS

S1-MME

MME

UE

4G -5G NSA

Connectivity 

 

Initial Context Setup

S1AP

S1-MME

eNB

MME

4G -5G NSA

Connectivity 

 

initialUEMessage

S1AP

S1-MME

eNB

MME

4G -5G NSA

Connectivity 

 

PDN connectivity

S1AP

S1-MME

UE

MME

4G -5G NSA

Connectivity 

 

Security Mode

S1AP/NAS-EPS

S1-MME

UE

MME

4G -5G NSA

Connectivity 

 

UECapabilityInfoIndication

S1AP

S1-MME

eNB

MME

4G -5G NSA

Connectivity 

 

UE Context Release

S1AP

S1-MME

MME

eNB

4G -5G NSA

Connectivity 

 

ERAB Modification Indication

S1AP

S1-MME

MME

eNB

4G -5G NSA

Connectivity 

 

Registration 

SIP

IMS

UE

P,S,I-CSCF

5G SA Connectivity

Technology

Service

Procedure

Protocols

Interface

Network Elements A

Network Elements B

Technology

Service

Procedure

Protocols

Interface

Network Elements A

Network Elements B

5G SA

Connectivity 

N1N2MessageTransfer/EBIAssignment

HTTP2

namf

SMF

AMF

5G SA

Connectivity 

UE Authentications/5g-aka-confirmation

HTTP2

nausf

AMF

AUSF

5G SA

Connectivity 

BroadForward Binding

HTTP2

nbsf

PCF

BSF

5G SA

Connectivity 

Policy control function binding

HTTP2

nbsf

PCF

BSF

5G SA

Connectivity 

CreatePCFBinding

HTTP2

nbsf

PCF

BSF

5G SA

Connectivity 

Converged charging 

HTTP2

nchf

PCF/SMF

CHF

5G SA

Connectivity 

Network Function Discovery and Management

HTTP2

nnrf

AUSF/AMF/PCF/SMF

NRF

5G SA

Connectivity 

Policy control 

HTTP2

nnrf

PCF

NRF

5G SA

Connectivity 

SM Policy Control Create/Update/Delete

HTTP2

npcf

SMF

PCF

5G SA

Connectivity 

Online Charging 

HTTP2

nsmf

SMF

CHF

5G SA

Connectivity 

Policy control 

HTTP2

nsmf

SMF

PCF

5G SA

Connectivity 

Service Registration

HTTP2

nsmf

SMF

NSSMF

5G SA

Connectivity 

Sm Context Create/Update/Release

HTTP2

nsmf

AMF

SMF

5G SA

Connectivity 

Network Slice Selection

HTTP2

nudm

SMF

UDM

5G SA

Connectivity 

Subscriber Data Management

HTTP2

nudm

SMF

UDM

5G SA

Connectivity 

UE Context Management

HTTP2

nudm

SMF

UDM

5G SA

Connectivity 

SmfDeregistration

HTTP2

nudm

SMF

UDM

5G SA

Connectivity 

GetSmData

HTTP2

nudm

SMF

UDM

5G SA

Connectivity 

Unsubscribe

HTTP2

nudm

SMF

UDM

5G SA

Connectivity 

GetNSSAI

HTTP2

nudm

SMF

UDM

5G SA

Connectivity 

GetSmfSelData

HTTP2

nudm

SMF

UDM

5G SA

Connectivity 

GetUeCtxInSmfData

HTTP2

nudm

SMF

UDM

5G SA

Connectivity 

Subscribe

HTTP2

nudm

SMF

UDM

5G SA

Connectivity 

DataRepository

HTTP2

nudr

NRF/PCF

UDR

5G SA

Connectivity 

DeleteSmfRegistration

HTTP2

nudr

SMF

UDR

5G SA

Connectivity 

CreateOrUpdateSmfRegistration

HTTP2

nudr

SMF

UDR

5G SA

Connectivity 

ReadSessionManagementPolicyData

HTTP2

nudr

PCF

UDR

5G SA

Connectivity 

QueryAmData

HTTP2

nudr

UDM

UDR

5G SA

Connectivity 

QueryAmfContext3gpp

HTTP2

nudr

UDM

UDR

5G SA

Connectivity 

QueryAuthSubsData

HTTP2

nudr

UDM

UDR

5G SA

Connectivity 

AmfContext3gpp

HTTP2

nudr

UDM

UDR

5G SA

Connectivity 

ModifyAuthenticationSubscription

HTTP2

nudr

UDM

UDR

5G SA

Connectivity 

CreateAmfContext3gpp

HTTP2

nudr

UDM

UDR

5G SA

Connectivity 

CreateAuthenticationStatus

HTTP2

nudr

UDM

UDR

5G SA

Connectivity 

PFCP-Session-Establishment/Deletion/Modification

PFCP

N4

UPF

SMF

5G SA

Connectivity 

Authentication

NAS-5GS

N1

AMF

UE

5G SA

Connectivity 

DL NAS transport

NAS-5GS

N1

AMF

UE

5G SA

Connectivity 

Identity

NAS-5GS

N1

AMF

UE

5G SA

Connectivity 

PDU session establishment/modification/release

NAS-5GS

N1

UE

AMF

5G SA

Connectivity 

Registration

NAS-5GS

N1

UE

AMF

5G SA

Connectivity 

Security

NAS-5GS

N1

AMF

UE

5G SA

Connectivity 

Service

NAS-5GS

N1

UE

AMF

5G SA

Connectivity 

DownlinkNASTransport

NGAP

N2

AMF

gNB

5G SA

Connectivity 

UplinkNASTransport

NGAP

N2

gNB

AMF

5G SA

Connectivity 

Initial Context Setup

NGAP

N2

AMF

gNB

5G SA

Connectivity 

Initial UE Message

NGAP

N2

gNB

AMF

5G SA

Connectivity 

PDU Session Resource Setup/Modify/Release

NGAP

N2

AMF

gNB

5G SA

Connectivity 

UERadioCapabilityInfoIndication

NGAP

N2

gNB

AMF

5G SA

Connectivity 

UEContextRelease

NGAP

N2

gNB

AMF

5G SA

Connectivity 

UERadioCapabilityCheck

NGAP

N2

gNB

AMF

5G SA

Connectivity 

Registration

SIP

IMS

UE

P,S,I-CSCF

5G SA Data

Technology

Service

Procedure

Protocols

Interface

Network Elements A

Network Elements B

Technology

Service

Procedure

Protocols

Interface

Network Elements A

Network Elements B

5G SA

Data

PFCP-Session-Establishment/Deletion/Modification

PFCP

N4

UPF

SMF

5G SA

Data

Authentication

NAS-5GS

N1

AMF

UE

5G SA

Data

Configuration update

NAS-5GS

N1

AMF

UE

5G SA

Data

Deregistration

NAS-5GS

N1

AMF

UE

5G SA

Data

Registration

NAS-5GS

N1

AMF

UE

5G SA

Data

InitialContextSetup

NGAP

N2

gNB

AMF

5G SA

Data

DownlinkNASTransport

NGAP

N2

AMF

gNB

5G SA

Data

UplinkNASTransport

NGAP

N2

gNB

AMF

5G SA

Data

InitialUEMessage

NGAP

N2

gNB

AMF

5G SA

Data

Security mode

NAS-5GS

N1

AMF

UE

5G SA

Data

UEContextRelease

NGAP

N2

gNB

AMF

5G SA

Data

UERadioCapabilityCheck

NGAP

N2

gNB

AMF

5G SA

Data

PDU Session Resource Setup/Modify/Release

NGAP

N2

gNB

AMF

5G SA

Data

PDU session establishment/modification/release

NAS-5GS

N1

UE

AMF

5G SA

Data

DNS Request

DNS

 

UE

DNS server

5G SA

Data

DNS response

DNS

 

UE

DNS server

5G SA

Data

ACK

TCP

 

UE

Data server

5G SA

Data

FIN_ACK

TCP

 

UE

Data server

5G SA

Data

FIN

TCP

 

UE

Data server

5G SA

Data

SYN

TCP

 

UE

Data server

5G SA

Data

SYN_ACK

TCP

 

UE

Data server

5G SA

Data

Echo

ICMPv4

 

UE

Data server

5G SA

Data

Echo

ICMPv6

 

UE

Data server

5G SA

Data

Destination Unreachable

ICMPv4

 

UE

Data server

5G SA

Data

Destination Unreachable

ICMPv6

 

UE

Data server

5G SA

Data

ClientHello

TLS

 

UE

Data server

5G SA

Data

ServerHello

TLS

 

UE

Data server

5G SA

Data

Modify Bearer

GTPV2

S11

MME

SGW

5G SA

Data

Delete Session

GTPV2

S11

MME

SGW

5G SA

Data

Create Session

GTPV2

S11

MME

SGW

5G SA

Data

Modify Bearer

GTPV2

S5

SGW

PGW

5G SA

Data

Delete Session

GTPV2

S5

SGW

PGW

5G SA

Data

Create Session

GTPV2

S5

SGW

PGW

5G SA

Data

N1N2MessageTransfer/EBIAssignment

HTTP2

namf

SMF

AMF

5G SA

Data

UE Authentications/5g-aka-confirmation

HTTP2

nausf

AMF

AUSF

5G SA

Data

BroadForward Binding

HTTP2

nbsf

PCF

BSF

5G SA

Data

Policy control function binding

HTTP2

nbsf

PCF

BSF

5G SA

Data

CreatePCFBinding

HTTP2

nbsf

PCF

BSF

5G SA

Data

Converged charging 

HTTP2

nchf

PCF/SMF

CHF

5G SA

Data

Network Function Discovery and Management

HTTP2

nnrf

AUSF/AMF/PCF/SMF

NRF

5G SA

Data

Policy control 

HTTP2

nnrf

PCF

NRF

5G SA

Data

SM Policy Control Create/Update/Delete

HTTP2

npcf

SMF

PCF

5G SA

Data

Online Charging 

HTTP2

nsmf

SMF

CHF

5G SA

Data

Policy control 

HTTP2

nsmf

SMF

PCF

5G SA

Data

Service Registration

HTTP2

nsmf

SMF

NSSMF

5G SA

Data

Sm Context Create/Update/Release

HTTP2

nsmf

AMF

SMF

5G SA

Data

Network Slice Selection

HTTP2

nudm

SMF

UDM

5G SA

Data

Subscriber Data Management

HTTP2

nudm

SMF

UDM

5G SA

Data

UE Context Management

HTTP2

nudm

SMF

UDM

5G SA

Data

SmfDeregistration

HTTP2

nudm

SMF

UDM

5G SA

Data

GetSmData

HTTP2

nudm

SMF

UDM

5G SA

Data

Unsubscribe

HTTP2

nudm

SMF

UDM

5G SA

Data

GetNSSAI

HTTP2

nudm

SMF

UDM

5G SA

Data

GetSmfSelData

HTTP2

nudm

SMF

UDM

5G SA

Data

GetUeCtxInSmfData

HTTP2

nudm

SMF

UDM

5G SA

Data

Subscribe

HTTP2

nudm

SMF

UDM

5G SA

Data

DataRepository

HTTP2

nudr

NRF/PCF

UDR

5G SA

Data

DeleteSmfRegistration

HTTP2

nudr

SMF

UDR

5G SA

Data

CreateOrUpdateSmfRegistration

HTTP2

nudr

SMF

UDR

5G SA

Data

ReadSessionManagementPolicyData

HTTP2

nudr

PCF

UDR

5G SA

Data

QueryAmData

HTTP2

nudr

UDM

UDR

5G SA

Data

QueryAmfContext3gpp

HTTP2

nudr

UDM

UDR

5G SA

Data

QueryAuthSubsData

HTTP2

nudr

UDM

UDR

5G SA

Data

AmfContext3gpp

HTTP2

nudr

UDM

UDR

5G SA

Data

ModifyAuthenticationSubscription

HTTP2

nudr

UDM

UDR

5G SA

Data

CreateAmfContext3gpp

HTTP2

nudr

UDM

UDR

5G SA

Data

CreateAuthenticationStatus

HTTP2

nudr

UDM

UDR

4G DATA

Technology

Service

Procedure

Protocols

Interface

Network Elements A

Network Elements B

Technology

Service

Procedure

Protocols

Interface

Network Elements A

Network Elements B

4G

Data

Credit-Control

Diameter

Gx

PGW

PCRF

4G

Data

Re-Auth

Diameter

Gx

PGW

PCRF

4G

Data

Credit-Control

Diameter

Gy

PGW

OCS

4G

Data

Authentication Information

Diameter

S6a/S6d

MME

HSS

4G

Data

Update Location

Diameter

S6a/S6d

MME

HSS

4G

Data

Notify

Diameter

S6a/S6d

MME

HSS

4G

Data

Cancel Location

Diameter

S6a/S6d

MME

HSS

4G

Data

Purge UE

Diameter

S6a/S6d

MME

HSS

4G

Data

Authorization Authentication(AAR/AAA)

Diameter

S6b

PGW

AAA

4G

Data

Session Termination

Diameter

S6b

PGW

AAA

4G

Data

Session Termination

Diameter

Sy

PCRF

OCS

4G

Data

Spending Limit

Diameter

Sy

PCRF

OCS

4G

Data

DNS Request

DNS

 

UE

DNS server

4G

Data

DNS response

DNS

 

UE

DNS server

4G

Data

ACK

TCP

 

UE

Data server

4G

Data

FIN_ACK

TCP

 

UE

Data server

4G

Data

FIN

TCP

 

UE

Data server

4G

Data

SYN

TCP

 

UE

Data server

4G

Data

SYN_ACK

TCP

 

UE

Data server

4G

Data

Echo

ICMPv4

 

UE

Data server

4G

Data

Echo

ICMPv6

 

UE

Data server

4G

Data

Destination Unreachable

ICMPv4

 

UE

Data server

4G

Data

Destination Unreachable

ICMPv6

 

UE

Data server

4G

Data

ClientHello

TLS

 

UE

Data server

4G

Data

ServerHello

TLS

 

UE

Data server

4G

Data

Modify Bearer

GTPV2

S11

MME

SGW

4G

Data

Delete Session

GTPV2

S11

MME

SGW

4G

Data

Create Session

GTPV2

S11

MME

SGW

4G

Data

Modify Bearer

GTPV2

S5

SGW

PGW

4G

Data

Delete Session

GTPV2

S5

SGW

PGW

4G

Data

Create Session

GTPV2

S5

SGW

PGW

4G

Data

Activate default EPS bearer context

S1AP/NAS-EPS

S1-MME

MME

UE

4G

Data

Activate dedicated EPS bearer context

S1AP/NAS-EPS

S1-MME

MME

UE

4G

Data

Attach

S1AP/NAS-EPS

S1-MME

UE

MME

4G

Data

Authentication

S1AP/NAS-EPS

S1-MME

UE

MME

4G

Data

Context Release 

S1AP

S1-MME

eNB

MME

4G

Data

Detach

S1AP/NAS-EPS

S1-MME

UE

MME

4G

Data

downlinkNASTransport

S1AP

S1-MME

MME

eNB

4G

Data

uplinkNASTransport

S1AP

S1-MME

eNB

MME

4G

Data

EMM information

S1AP/NAS-EPS

S1-MME

MME

UE

4G

Data

ESM information

S1AP/NAS-EPS

S1-MME

MME

UE

4G

Data

Initial Context Setup

S1AP

S1-MME

eNB

MME

4G

Data

initialUEMessage

S1AP

S1-MME

eNB

MME

4G

Data

PDN connectivity

S1AP

S1-MME

UE

MME

4G

Data

Security Mode

S1AP/NAS-EPS

S1-MME

UE

MME

4G

Data

UECapabilityInfoIndication

S1AP

S1-MME

eNB

MME

4G

Data

UE Context Release

S1AP

S1-MME

MME

eNB

4G

Data

ERAB Modification Indication

S1AP

S1-MME

MME

eNB

5G SA Mobility

Technology

Service

Sub Service

Call Flow

Protocols

Interface

Network Elements A

Network Elements B

Technology

Service

Sub Service

Call Flow

Protocols

Interface

Network Elements A

Network Elements B

5G

Mobility

4G to 5G Handover

Bearer Establishment

GTPV2

S5

PGW

SGW

5G

Mobility

4G to 5G Handover

Bearer Establishment

GTPV2

S2b

PGW

ePDG

5G

Mobility

4G to 5G Handover

Bearer modification

GTPV2

S5

MME

SGW

5G

Mobility

4G to 5G Handover

Bearer Delete

GTPV2

S2b

ePDG

PGW

5G

Mobility

4G to 5G Handover

Session Establishment

GTPV2

S2b

PGW

ePDG

5G

Mobility

4G to 5G Handover

Forward-Relocation

GTPv2

N26

AMF

MME

5G

Mobility

4G to 5G Handover

Create/Update_SmContext

HTTP2

Nsmf

AMF

SMF

5G

Mobility

4G to 5G Handover

ChargingDataUpdate

HTTP2

Nchf

SMF

CHF

5G

Mobility

4G to 5G Handover

UpdateSMPolicy

HTTP2

Npcf

SMF

PCF

5G

Mobility

4G to 5G Handover

N1N2MessageTransfer/EBIAssignment

HTTP2

Namf

SMF

AMF

5G

Mobility

4G to 5G Handover

PFCP-Session-Establishment/Modification/Deletion

PFCP

N4

SMF

UPF

5G

Mobility

5G to WIFI Handover

Bearer Establishment

GTPV2

S5

PGW

SGW

5G

Mobility

5G to WIFI Handover

Bearer Establishment

GTPV2

S2b

PGW

ePDG

5G

Mobility

5G to WIFI Handover

Bearer modification

GTPV2

S5

MME

SGW

5G

Mobility

5G to WIFI Handover

Bearer Delete

GTPV2

S2b

ePDG

PGW

5G

Mobility

5G to WIFI Handover

Session Establishment

GTPV2

S2b

PGW

ePDG

5G

Mobility

5G to WIFI Handover

Forward-Relocation

GTPv2

N26

AMF

MME

5G

Mobility

5G to WIFI Handover

Create/Update_SmContext

HTTP2

Nsmf

AMF

SMF

5G

Mobility

5G to WIFI Handover

ChargingDataUpdate

HTTP2

Nchf

SMF

CHF

5G

Mobility

5G to WIFI Handover

UpdateSMPolicy

HTTP2

Npcf

SMF

PCF

5G

Mobility

5G to WIFI Handover

N1N2MessageTransfer/EBIAssignment

HTTP2

Namf

SMF

AMF

5G

Mobility

5G to WIFI Handover

PFCP-Session-Establishment/Modification/Deletion

PFCP

N4

SMF

UPF

5G

Mobility

EPSFB

Bearer Establishment

GTPV2

S5

PGW

SGW

5G

Mobility

EPSFB

Bearer Establishment

GTPV2

S2b

PGW

ePDG

5G

Mobility

EPSFB

Bearer modification

GTPV2

S5

MME

SGW

5G

Mobility

EPSFB

Bearer Delete

GTPV2

S2b

ePDG

PGW

5G

Mobility

EPSFB

Session Establishment

GTPV2

S2b

PGW

ePDG

5G

Mobility

EPSFB

Forward-Relocation

GTPv2

N26

AMF

MME

5G

Mobility

EPSFB

Create/Update_SmContext

HTTP2

Nsmf

AMF

SMF

5G

Mobility

EPSFB

ChargingDataUpdate

HTTP2

Nchf

SMF

CHF

5G

Mobility

EPSFB

UpdateSMPolicy

HTTP2

Npcf

SMF

PCF

5G

Mobility

EPSFB

N1N2MessageTransfer/EBIAssignment

HTTP2

Namf

SMF

AMF

5G

Mobility

EPSFB

PFCP-Session-Establishment/Modification/Deletion

PFCP

N4

SMF

UPF

5G

Mobility

N2 Handover

Bearer Establishment

GTPV2

S5

PGW

SGW

5G

Mobility

N2 Handover

Bearer Establishment

GTPV2

S2b

PGW

ePDG

5G

Mobility

N2 Handover

Bearer modification

GTPV2

S5

MME

SGW

5G

Mobility

N2 Handover

Bearer Delete

GTPV2

S2b

ePDG

PGW

5G

Mobility

N2 Handover

Session Establishment

GTPV2

S2b

PGW

ePDG

5G

Mobility

N2 Handover

Forward-Relocation

GTPv2

N26

AMF

MME

5G

Mobility

N2 Handover

Create/Update_SmContext

HTTP2

Nsmf

AMF

SMF

5G

Mobility

N2 Handover

ChargingDataUpdate

HTTP2

Nchf

SMF

CHF

5G

Mobility

N2 Handover

UpdateSMPolicy

HTTP2

Npcf

SMF

PCF

5G

Mobility

N2 Handover

N1N2MessageTransfer/EBIAssignment

HTTP2

Namf

SMF

AMF

5G

Mobility

N2 Handover

PFCP-Session-Establishment/Modification/Deletion

PFCP

N4

SMF

UPF

5G

Mobility

WIFI to 5G Handover

Bearer Establishment

GTPV2

S5

PGW

SGW

5G

Mobility

WIFI to 5G Handover

Bearer Establishment

GTPV2

S2b

PGW

ePDG

5G

Mobility

WIFI to 5G Handover

Bearer modification

GTPV2

S5

MME

SGW

5G

Mobility

WIFI to 5G Handover

Bearer Delete

GTPV2

S2b

ePDG

PGW

5G

Mobility

WIFI to 5G Handover

Session Establishment

GTPV2

S2b

PGW

ePDG

5G

Mobility

WIFI to 5G Handover

Forward-Relocation

GTPv2

N26

AMF

MME

5G

Mobility

WIFI to 5G Handover

Create/Update_SmContext

HTTP2

Nsmf

AMF

SMF

5G

Mobility

WIFI to 5G Handover

ChargingDataUpdate

HTTP2

Nchf

SMF

CHF

5G

Mobility

WIFI to 5G Handover

UpdateSMPolicy

HTTP2

Npcf

SMF

PCF

5G

Mobility

WIFI to 5G Handover

N1N2MessageTransfer/EBIAssignment

HTTP2

Namf

SMF

AMF

5G

Mobility

WIFI to 5G Handover

PFCP-Session-Establishment/Modification/Deletion

PFCP

N4

SMF

UPF

5G

Mobility

Xn Handover

Bearer Establishment

GTPV2

S5

PGW

SGW

5G

Mobility

Xn Handover

Bearer Establishment

GTPV2

S2b

PGW

ePDG

5G

Mobility

Xn Handover

Bearer modification

GTPV2

S5

MME

SGW

5G

Mobility

Xn Handover

Bearer Delete

GTPV2

S2b

ePDG

PGW

5G

Mobility

Xn Handover

Session Establishment

GTPV2

S2b

PGW

ePDG

5G

Mobility

Xn Handover

Forward-Relocation

GTPv2

N26

AMF

MME

5G

Mobility

Xn Handover

Create/Update_SmContext

HTTP2

Nsmf

AMF

SMF

5G

Mobility

Xn Handover

ChargingDataUpdate

HTTP2

Nchf

SMF

CHF

5G

Mobility

Xn Handover

UpdateSMPolicy

HTTP2

Npcf

SMF

PCF

5G

Mobility

Xn Handover

N1N2MessageTransfer/EBIAssignment

HTTP2

Namf

SMF

AMF

5G

Mobility

Xn Handover

PFCP-Session-Establishment/Modification/Deletion

PFCP

N4

SMF

UPF

SMS over NAS-5GS

Technology

Service

Sub Service

Procedure

Protocols

Interface

Network Elements A

Network Elements B

Technology

Service

Sub Service

Procedure

Protocols

Interface

Network Elements A

Network Elements B

5G

sms_nas5gs

 

Registration

NAS-5GS

N1

AMF

UE

5G

sms_nas5gs

 

UEContext

HTTP2

nsmsf

SMSF

AMF

5G

sms_nas5gs

 

GetSmsMngtData

HTTP2

nudm

SMSF

UDM

5G

sms_nas5gs

 

Subscribe

HTTP2

nudm

SMSF

UDM

5G

sms_nas5gs

 

3GppSmsfRegistration

HTTP2

nudm

UDM

SMSF

5G

sms_nas5gs

 

N1N2MessageTransfer

HTTP2

namf

AMF

SMSF

5G

sms_nas5gs

 

SendSms

HTTP2

nsmsf

AMF

SMSF

5G

sms_nas5gs

 

Unsubscribe

HTTP2

nudm

UDM

SMSF

5G

sms_nas5gs

 

3GppSmsDeregistration

HTTP2

nudm

UDM

SMSF

5G VoNR

Technology

Service

Sub Service

Procedure

Protocols

Interface

Network Elements A

Network Elements B

Technology

Service

Sub Service

Procedure

Protocols

Interface

Network Elements A

Network Elements B

5G

VoNR

VoLTE to VoNR

Location-Info

Diameter

Cx

I-CSCF

HSS

5G

VoNR

VoLTE to VoNR

Multimedia Authentication

Diameter

Cx

S-CSCF

HSS

5G

VoNR

VoLTE to VoNR

Server-Assignment

Diameter

Cx

S-CSCF

HSS

5G

VoNR

VoLTE to VoNR

User-Authorization

Diameter

Cx

I-CSCF

HSS

5G

VoNR

VoLTE to VoNR

Policy control 

Diameter

Gx

PGW

PCRF

5G

VoNR

VoLTE to VoNR

Online Charging 

Diameter

Gy

PGW

OCS

5G

VoNR

VoLTE to VoNR

Accounting

Diameter

Gz/Rf

PGW

CDF

5G

VoNR

VoLTE to VoNR

Credit-Control

Diameter

Ro

OCS

TAS

5G

VoNR

VoLTE to VoNR

Authorization Authentication(AAR/AAA)

Diameter

Rx

PCSCF

PCRF

5G

VoNR

VoLTE to VoNR

Session Termination

Diameter

Rx

PCSCF

PCRF

5G

VoNR

VoLTE to VoNR

Re-Authorization (RAR/RAA)

Diameter

Rx

PCSCF

PCRF

5G

VoNR

VoLTE to VoNR

Authentication

Diameter

S6a/S6d

MME

HSS

5G

VoNR

VoLTE to VoNR

Location Update

Diameter

S6a/S6d

MME

HSS

5G

VoNR

VoLTE to VoNR

Authorization Authentication(AAR/AAA)

Diameter

S6b

PGW

AAA

5G

VoNR

VoLTE to VoNR

Session-Termination

Diameter

S6b

PGW

AAA

5G

VoNR

VoLTE to VoNR

Profile-Update

Diameter

Sh

HSS

TAS

5G

VoNR

VoLTE to VoNR

Subscribe-Notifications

Diameter

Sh

TAS

HSS

5G

VoNR

VoLTE to VoNR

User-Data-Request and Answer

Diameter

Sh

HSS

TAS

5G

VoNR

VoLTE to VoNR

Server-Assignment 

Diameter

SWx

AAA

HSS

5G

VoNR

VoLTE to VoNR

Online Charging 

Diameter

Sy

PGW

PCRF

5G

VoNR

VoLTE to VoNR

Spending-Limit

Diameter

Sy

PCRF

OCS

5G

VoNR

VoLTE to VoNR

N1N2MessageTransfer/EBIAssignment

HTTP2

namf

SMF

AMF

5G

VoNR

VoLTE to VoNR

UE Authentications/5g-aka-confirmation

HTTP2

nausf

AMF

AUSF

5G

VoNR

VoLTE to VoNR

BroadForward Binding

HTTP2

nbsf

PCF

BSF

5G

VoNR

VoLTE to VoNR

Policy control function binding

HTTP2

nbsf

PCF

BSF

5G

VoNR

VoLTE to VoNR

Converged charging 

HTTP2

nchf

PCF/SMF

CHF

5G

VoNR

VoLTE to VoNR

Network Function Discovery and Management

HTTP2

nnrf

AUSF/AMF/PCF/SMF

NRF

5G

VoNR

VoLTE to VoNR

Policy control 

HTTP2

nnrf

PCF

NRF

5G

VoNR

VoLTE to VoNR

SM Policy Control Create/Update/Delete

HTTP2

npcf

SMF

PCF

5G

VoNR

VoLTE to VoNR

Online Charging 

HTTP2

nsmf

SMF

CHF

5G

VoNR

VoLTE to VoNR

Policy control 

HTTP2

nsmf

SMF

PCF

5G

VoNR

VoLTE to VoNR

Service Registration

HTTP2

nsmf

SMF

NSSMF

5G

VoNR

VoLTE to VoNR

Sm Context Create/Update/Release

HTTP2

nsmf

AMF

SMF

5G

VoNR

VoLTE to VoNR

Network Slice Selection

HTTP2

nudm

SMF

UDM

5G

VoNR

VoLTE to VoNR

Subscriber Data Management

HTTP2

nudm

SMF

UDM

5G

VoNR

VoLTE to VoNR

UE Context Management

HTTP2

nudm

SMF

UDM

5G

VoNR

VoLTE to VoNR

DataRepository

HTTP2

nudr

NRF/PCF

UDR

5G

VoNR

VoLTE to VoNR

Authentication

NAS-5GS

N1

AMF

UE

5G

VoNR

VoLTE to VoNR

DL NAS transport

NAS-5GS

N1

AMF

UE

5G

VoNR

VoLTE to VoNR

Identity

NAS-5GS

N1

AMF

UE

5G

VoNR

VoLTE to VoNR

PDU session establishment

NAS-5GS

N1

UE

AMF

5G

VoNR

VoLTE to VoNR

Security

NAS-5GS

N1

AMF

UE

5G

VoNR

VoLTE to VoNR

DownlinkNASTransport

NGAP

N2

AMF

gNB

5G

VoNR

VoLTE to VoNR

UplinkNASTransport

NGAP

N2

gNB

AMF

5G

VoNR

VoLTE to VoNR

Initial Context Setup

NGAP

N2

AMF

gNB

5G

VoNR

VoLTE to VoNR

Initial UE Message

NGAP

N2

gNB

AMF

5G

VoNR

VoLTE to VoNR

PDU Session Resource Setup/Modify/Release

NGAP

N2

AMF

gNB

5G

VoNR

VoLTE to VoNR

UERadioCapabilityInfoIndication

NGAP

N2

gNB

AMF

5G

VoNR

VoLTE to VoNR

PFCP-Session-Establishment/Modification/Deletion

PFCP

N4

SMF

UPF

5G

VoNR

VoLTE to VoNR

call Hold

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

5G

VoNR

VoLTE to VoNR

MO-Calling party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

5G

VoNR

VoLTE to VoNR

MT-Called party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

5G

VoNR

VoNR Call Conference

Location-Info

Diameter

Cx

I-CSCF

HSS

5G

VoNR

VoNR Call Conference

Multimedia Authentication

Diameter

Cx

S-CSCF

HSS

5G

VoNR

VoNR Call Conference

Server-Assignment

Diameter

Cx

S-CSCF

HSS

5G

VoNR

VoNR Call Conference

User-Authorization

Diameter

Cx

I-CSCF

HSS

5G

VoNR

VoNR Call Conference

Policy control 

Diameter

Gx

PGW

PCRF

5G

VoNR

VoNR Call Conference

Online Charging 

Diameter

Gy

PGW

OCS

5G

VoNR

VoNR Call Conference

Accounting

Diameter

Gz/Rf

PGW

CDF

5G

VoNR

VoNR Call Conference

Credit-Control

Diameter

Ro

OCS

TAS

5G

VoNR

VoNR Call Conference

Authorization Authentication(AAR/AAA)

Diameter

Rx

PCSCF

PCRF

5G

VoNR

VoNR Call Conference

Session Termination

Diameter

Rx

PCSCF

PCRF

5G

VoNR

VoNR Call Conference

Re-Authorization (RAR/RAA)

Diameter

Rx

PCSCF

PCRF

5G

VoNR

VoNR Call Conference

Authentication

Diameter

S6a/S6d

MME

HSS

5G

VoNR

VoNR Call Conference

Location Update

Diameter

S6a/S6d

MME

HSS

5G

VoNR

VoNR Call Conference

Authorization Authentication(AAR/AAA)

Diameter

S6b

PGW

AAA

5G

VoNR

VoNR Call Conference

Session-Termination

Diameter

S6b

PGW

AAA

5G

VoNR

VoNR Call Conference

Profile-Update

Diameter

Sh

HSS

TAS

5G

VoNR

VoNR Call Conference

Subscribe-Notifications

Diameter

Sh

TAS

HSS

5G

VoNR

VoNR Call Conference

User-Data-Request and Answer

Diameter

Sh

HSS

TAS

5G

VoNR

VoNR Call Conference

Server-Assignment 

Diameter

SWx

AAA

HSS

5G

VoNR

VoNR Call Conference

Online Charging 

Diameter

Sy

PGW

PCRF

5G

VoNR

VoNR Call Conference

Spending-Limit

Diameter

Sy

PCRF

OCS

5G

VoNR

VoNR Call Conference

N1N2MessageTransfer/EBIAssignment

HTTP2

namf

SMF

AMF

5G

VoNR

VoNR Call Conference

UE Authentications/5g-aka-confirmation

HTTP2

nausf

AMF

AUSF

5G

VoNR

VoNR Call Conference

BroadForward Binding

HTTP2

nbsf

PCF

BSF

5G

VoNR

VoNR Call Conference

Policy control function binding

HTTP2

nbsf

PCF

BSF

5G

VoNR

VoNR Call Conference

Converged charging 

HTTP2

nchf

PCF/SMF

CHF

5G

VoNR

VoNR Call Conference

Network Function Discovery and Management

HTTP2

nnrf

AUSF/AMF/PCF/SMF

NRF

5G

VoNR

VoNR Call Conference

Policy control 

HTTP2

nnrf

PCF

NRF

5G

VoNR

VoNR Call Conference

SM Policy Control Create/Update/Delete

HTTP2

npcf

SMF

PCF

5G

VoNR

VoNR Call Conference

Online Charging 

HTTP2

nsmf

SMF

CHF

5G

VoNR

VoNR Call Conference

Policy control 

HTTP2

nsmf

SMF

PCF

5G

VoNR

VoNR Call Conference

Service Registration

HTTP2

nsmf

SMF

NSSMF

5G

VoNR

VoNR Call Conference

Sm Context Create/Update/Release

HTTP2

nsmf

AMF

SMF

5G

VoNR

VoNR Call Conference

Network Slice Selection

HTTP2

nudm

SMF

UDM

5G

VoNR

VoNR Call Conference

Subscriber Data Management

HTTP2

nudm

SMF

UDM

5G

VoNR

VoNR Call Conference

UE Context Management

HTTP2

nudm

SMF

UDM

5G

VoNR

VoNR Call Conference

DataRepository

HTTP2

nudr

NRF/PCF

UDR

5G

VoNR

VoNR Call Conference

Authentication

NAS-5GS

N1

AMF

UE

5G

VoNR

VoNR Call Conference

DL NAS transport

NAS-5GS

N1

AMF

UE

5G

VoNR

VoNR Call Conference

Identity

NAS-5GS

N1

AMF

UE

5G

VoNR

VoNR Call Conference

PDU session establishment

NAS-5GS

N1

UE

AMF

5G

VoNR

VoNR Call Conference

Security

NAS-5GS

N1

AMF

UE

5G

VoNR

VoNR Call Conference

DownlinkNASTransport

NGAP

N2

AMF

gNB

5G

VoNR

VoNR Call Conference

UplinkNASTransport

NGAP

N2

gNB

AMF

5G

VoNR

VoNR Call Conference

Initial Context Setup

NGAP

N2

AMF

gNB

5G

VoNR

VoNR Call Conference

Initial UE Message

NGAP

N2

gNB

AMF

5G

VoNR

VoNR Call Conference

PDU Session Resource Setup/Modify/Release

NGAP

N2

AMF

gNB

5G

VoNR

VoNR Call Conference

UERadioCapabilityInfoIndication

NGAP

N2

gNB

AMF

5G

VoNR

VoNR Call Conference

PFCP-Session-Establishment/Modification/Deletion

PFCP

N4

SMF

UPF

5G

VoNR

VoNR Call Conference

Call Conference prep leg

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

5G

VoNR

VoNR Call Conference

Call Conference server leg

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

5G

VoNR

VoNR Call Conference

Call Forwarding/divert leg

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

5G

VoNR

VoNR Call Conference

Call Hold

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

5G

VoNR

VoNR Call Conference

MO-Calling party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

5G

VoNR

VoNR Call Conference

MT-Called party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

5G

VoNR

VoNR Call Forward 

Location-Info

Diameter

Cx

I-CSCF

HSS

5G

VoNR

VoNR Call Forward 

Multimedia Authentication

Diameter

Cx

S-CSCF

HSS

5G

VoNR

VoNR Call Forward 

Server-Assignment

Diameter

Cx

S-CSCF

HSS

5G

VoNR

VoNR Call Forward 

User-Authorization

Diameter

Cx

I-CSCF

HSS

5G

VoNR

VoNR Call Forward 

Policy control 

Diameter

Gx

PGW

PCRF

5G

VoNR

VoNR Call Forward 

Online Charging 

Diameter

Gy

PGW

OCS

5G

VoNR

VoNR Call Forward 

Accounting

Diameter

Gz/Rf

PGW

CDF

5G

VoNR

VoNR Call Forward 

Credit-Control

Diameter

Ro

OCS

TAS

5G

VoNR

VoNR Call Forward 

Authorization Authentication(AAR/AAA)

Diameter

Rx

PCSCF

PCRF

5G

VoNR

VoNR Call Forward 

Session Termination

Diameter

Rx

PCSCF

PCRF

5G

VoNR

VoNR Call Forward 

Re-Authorization (RAR/RAA)

Diameter

Rx

PCSCF

PCRF

5G

VoNR

VoNR Call Forward 

Authentication

Diameter

S6a/S6d

MME

HSS

5G

VoNR

VoNR Call Forward 

Location Update

Diameter

S6a/S6d

MME

HSS

5G

VoNR

VoNR Call Forward 

Authorization Authentication(AAR/AAA)

Diameter

S6b

PGW

AAA

5G

VoNR

VoNR Call Forward 

Session-Termination

Diameter

S6b

PGW

AAA

5G

VoNR

VoNR Call Forward 

Profile-Update

Diameter

Sh

HSS

TAS

5G

VoNR

VoNR Call Forward 

Subscribe-Notifications

Diameter

Sh

TAS

HSS

5G

VoNR

VoNR Call Forward 

User-Data-Request and Answer

Diameter

Sh

HSS

TAS

5G

VoNR

VoNR Call Forward 

Server-Assignment 

Diameter

SWx

AAA

HSS

5G

VoNR

VoNR Call Forward 

Online Charging 

Diameter

Sy

PGW

PCRF

5G

VoNR

VoNR Call Forward 

Spending-Limit

Diameter

Sy

PCRF

OCS

5G

VoNR

VoNR Call Forward 

N1N2MessageTransfer/EBIAssignment

HTTP2

namf

SMF

AMF

5G

VoNR

VoNR Call Forward 

UE Authentications/5g-aka-confirmation

HTTP2

nausf

AMF

AUSF

5G

VoNR

VoNR Call Forward 

BroadForward Binding

HTTP2

nbsf

PCF

BSF

5G

VoNR

VoNR Call Forward 

Policy control function binding

HTTP2

nbsf

PCF

BSF

5G

VoNR

VoNR Call Forward 

Converged charging 

HTTP2

nchf

PCF/SMF

CHF

5G

VoNR

VoNR Call Forward 

Network Function Discovery and Management

HTTP2

nnrf

AUSF/AMF/PCF/SMF

NRF

5G

VoNR

VoNR Call Forward 

Policy control 

HTTP2

nnrf

PCF

NRF

5G

VoNR

VoNR Call Forward 

SM Policy Control Create/Update/Delete

HTTP2

npcf

SMF

PCF

5G

VoNR

VoNR Call Forward 

Online Charging 

HTTP2

nsmf

SMF

CHF

5G

VoNR

VoNR Call Forward 

Policy control 

HTTP2

nsmf

SMF

PCF

5G

VoNR

VoNR Call Forward 

Service Registration

HTTP2

nsmf

SMF

NSSMF

5G

VoNR

VoNR Call Forward 

Sm Context Create/Update/Release

HTTP2

nsmf

AMF

SMF

5G

VoNR

VoNR Call Forward 

Network Slice Selection

HTTP2

nudm

SMF

UDM

5G

VoNR

VoNR Call Forward 

Subscriber Data Management

HTTP2

nudm

SMF

UDM

5G

VoNR

VoNR Call Forward 

UE Context Management

HTTP2

nudm

SMF

UDM

5G

VoNR

VoNR Call Forward 

DataRepository

HTTP2

nudr

NRF/PCF

UDR

5G

VoNR

VoNR Call Forward 

Authentication

NAS-5GS

N1

AMF

UE

5G

VoNR

VoNR Call Forward 

DL NAS transport

NAS-5GS

N1

AMF

UE

5G

VoNR

VoNR Call Forward 

Identity

NAS-5GS

N1

AMF

UE

5G

VoNR

VoNR Call Forward 

PDU session establishment

NAS-5GS

N1

UE

AMF

5G

VoNR

VoNR Call Forward 

Security

NAS-5GS

N1

AMF

UE

5G

VoNR

VoNR Call Forward 

DownlinkNASTransport

NGAP

N2

AMF

gNB

5G

VoNR

VoNR Call Forward 

UplinkNASTransport

NGAP

N2

gNB

AMF

5G

VoNR

VoNR Call Forward 

Initial Context Setup

NGAP

N2

AMF

gNB

5G

VoNR

VoNR Call Forward 

Initial UE Message

NGAP

N2

gNB

AMF

5G

VoNR

VoNR Call Forward 

PDU Session Resource Setup/Modify/Release

NGAP

N2

AMF

gNB

5G

VoNR

VoNR Call Forward 

UERadioCapabilityInfoIndication

NGAP

N2

gNB

AMF

5G

VoNR

VoNR Call Forward 

PFCP-Session-Establishment/Modification/Deletion

PFCP

N4

SMF

UPF

5G

VoNR

VoNR Call Forward 

Call Forwarding/divert leg

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

5G

VoNR

VoNR Call Forward 

Call Hold

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

5G

VoNR

VoNR Call Forward 

MO-Calling party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

5G

VoNR

VoNR Call Forward 

MT-Called party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

5G

VoNR

VoNR MSIM

Location-Info

Diameter

Cx

I-CSCF

HSS

5G

VoNR

VoNR MSIM

Multimedia Authentication

Diameter

Cx

S-CSCF

HSS

5G

VoNR

VoNR MSIM

Server-Assignment

Diameter

Cx

S-CSCF

HSS

5G

VoNR

VoNR MSIM

User-Authorization

Diameter

Cx

I-CSCF

HSS

5G

VoNR

VoNR MSIM

Policy control 

Diameter

Gx

PGW

PCRF

5G

VoNR

VoNR MSIM

Online Charging 

Diameter

Gy

PGW

OCS

5G

VoNR

VoNR MSIM

Accounting

Diameter

Gz/Rf

PGW

CDF

5G

VoNR

VoNR MSIM

Credit-Control

Diameter

Ro

OCS

TAS

5G

VoNR

VoNR MSIM

Authorization Authentication(AAR/AAA)

Diameter

Rx

PCSCF

PCRF

5G

VoNR

VoNR MSIM

Session Termination

Diameter

Rx

PCSCF

PCRF

5G

VoNR

VoNR MSIM

Re-Authorization (RAR/RAA)

Diameter

Rx

PCSCF

PCRF

5G

VoNR

VoNR MSIM

Authentication

Diameter

S6a/S6d

MME

HSS

5G

VoNR

VoNR MSIM

Location Update

Diameter

S6a/S6d

MME

HSS

5G

VoNR

VoNR MSIM

Authorization Authentication(AAR/AAA)

Diameter

S6b

PGW

AAA

5G

VoNR

VoNR MSIM

Session-Termination

Diameter

S6b

PGW

AAA

5G

VoNR

VoNR MSIM

Profile-Update

Diameter

Sh

HSS

TAS

5G

VoNR

VoNR MSIM

Subscribe-Notifications

Diameter

Sh

TAS

HSS

5G

VoNR

VoNR MSIM

User-Data-Request and Answer

Diameter

Sh

HSS

TAS

5G

VoNR

VoNR MSIM

Server-Assignment 

Diameter

SWx

AAA

HSS

5G

VoNR

VoNR MSIM

Online Charging 

Diameter

Sy

PGW

PCRF

5G

VoNR

VoNR MSIM

Spending-Limit

Diameter

Sy

PCRF

OCS

5G

VoNR

VoNR MSIM

N1N2MessageTransfer/EBIAssignment

HTTP2

namf

SMF

AMF

5G

VoNR

VoNR MSIM

UE Authentications/5g-aka-confirmation

HTTP2

nausf

AMF

AUSF

5G

VoNR

VoNR MSIM

BroadForward Binding

HTTP2

nbsf

PCF

BSF

5G

VoNR

VoNR MSIM

Policy control function binding

HTTP2

nbsf

PCF

BSF

5G

VoNR

VoNR MSIM

Converged charging 

HTTP2

nchf

PCF/SMF

CHF

5G

VoNR

VoNR MSIM

Network Function Discovery and Management

HTTP2

nnrf

AUSF/AMF/PCF/SMF

NRF

5G

VoNR

VoNR MSIM

Policy control 

HTTP2

nnrf

PCF

NRF

5G

VoNR

VoNR MSIM

SM Policy Control Create/Update/Delete

HTTP2

npcf

SMF

PCF

5G

VoNR

VoNR MSIM

Online Charging 

HTTP2

nsmf

SMF

CHF

5G

VoNR

VoNR MSIM

Policy control 

HTTP2

nsmf

SMF

PCF

5G

VoNR

VoNR MSIM

Service Registration

HTTP2

nsmf

SMF

NSSMF

5G

VoNR

VoNR MSIM

Sm Context Create/Update/Release

HTTP2

nsmf

AMF

SMF

5G

VoNR

VoNR MSIM

Network Slice Selection

HTTP2

nudm

SMF

UDM

5G

VoNR

VoNR MSIM

Subscriber Data Management

HTTP2

nudm

SMF

UDM

5G

VoNR

VoNR MSIM

UE Context Management

HTTP2

nudm

SMF

UDM

5G

VoNR

VoNR MSIM

DataRepository

HTTP2

nudr

NRF/PCF

UDR

5G

VoNR

VoNR MSIM

Authentication

NAS-5GS

N1

AMF

UE

5G

VoNR

VoNR MSIM

DL NAS transport

NAS-5GS

N1

AMF

UE

5G

VoNR

VoNR MSIM

Identity

NAS-5GS

N1

AMF

UE

5G

VoNR

VoNR MSIM

PDU session establishment

NAS-5GS

N1

UE

AMF

5G

VoNR

VoNR MSIM

Security

NAS-5GS

N1

AMF

UE

5G

VoNR

VoNR MSIM

DownlinkNASTransport

NGAP

N2

AMF

gNB

5G

VoNR

VoNR MSIM

UplinkNASTransport

NGAP

N2

gNB

AMF

5G

VoNR

VoNR MSIM

Initial Context Setup

NGAP

N2

AMF

gNB

5G

VoNR

VoNR MSIM

Initial UE Message

NGAP

N2

gNB

AMF

5G

VoNR

VoNR MSIM

PDU Session Resource Setup/Modify/Release

NGAP

N2

AMF

gNB

5G

VoNR

VoNR MSIM

UERadioCapabilityInfoIndication

NGAP

N2

gNB

AMF

5G

VoNR

VoNR MSIM

PFCP-Session-Establishment/Modification/Deletion

PFCP

N4

SMF

UPF

5G

VoNR

VoNR MSIM

Call Forwarding/divert leg

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

5G

VoNR

VoNR MSIM

Call Hold

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

5G

VoNR

VoNR MSIM

MO-Calling party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

5G

VoNR

VoNR MSIM

MT-Called party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

5G

VoNR

VoNR to PSTN

Location-Info

Diameter

Cx

I-CSCF

HSS

5G

VoNR

VoNR to PSTN

Multimedia Authentication

Diameter

Cx

S-CSCF

HSS

5G

VoNR

VoNR to PSTN

Server-Assignment

Diameter

Cx

S-CSCF

HSS

5G

VoNR

VoNR to PSTN

User-Authorization

Diameter

Cx

I-CSCF

HSS

5G

VoNR

VoNR to PSTN

Policy control 

Diameter

Gx

PGW

PCRF

5G

VoNR

VoNR to PSTN

Online Charging 

Diameter

Gy

PGW

OCS

5G

VoNR

VoNR to PSTN

Accounting

Diameter

Gz/Rf

PGW

CDF

5G

VoNR

VoNR to PSTN

Credit-Control

Diameter

Ro

OCS

TAS

5G

VoNR

VoNR to PSTN

Authorization Authentication(AAR/AAA)

Diameter

Rx

PCSCF

PCRF

5G

VoNR

VoNR to PSTN

Session Termination

Diameter

Rx

PCSCF

PCRF

5G

VoNR

VoNR to PSTN

Re-Authorization (RAR/RAA)

Diameter

Rx

PCSCF

PCRF

5G

VoNR

VoNR to PSTN

Authentication

Diameter

S6a/S6d

MME

HSS

5G

VoNR

VoNR to PSTN

Location Update

Diameter

S6a/S6d

MME

HSS

5G

VoNR

VoNR to PSTN

Authorization Authentication(AAR/AAA)

Diameter

S6b

PGW

AAA

5G

VoNR

VoNR to PSTN

Session-Termination

Diameter

S6b

PGW

AAA

5G

VoNR

VoNR to PSTN

Profile-Update

Diameter

Sh

HSS

TAS

5G

VoNR

VoNR to PSTN

Subscribe-Notifications

Diameter

Sh

TAS

HSS

5G

VoNR

VoNR to PSTN

User-Data-Request and Answer

Diameter

Sh

HSS

TAS

5G

VoNR

VoNR to PSTN

Server-Assignment 

Diameter

SWx

AAA

HSS

5G

VoNR

VoNR to PSTN

Online Charging 

Diameter

Sy

PGW

PCRF

5G

VoNR

VoNR to PSTN

Spending-Limit

Diameter

Sy

PCRF

OCS

5G

VoNR

VoNR to PSTN

N1N2MessageTransfer/EBIAssignment

HTTP2

namf

SMF

AMF

5G

VoNR

VoNR to PSTN

UE Authentications/5g-aka-confirmation

HTTP2

nausf

AMF

AUSF

5G

VoNR

VoNR to PSTN

BroadForward Binding

HTTP2

nbsf

PCF

BSF

5G

VoNR

VoNR to PSTN

Policy control function binding

HTTP2

nbsf

PCF

BSF

5G

VoNR

VoNR to PSTN

Converged charging 

HTTP2

nchf

PCF/SMF

CHF

5G

VoNR

VoNR to PSTN

Network Function Discovery and Management

HTTP2

nnrf

AUSF/AMF/PCF/SMF

NRF

5G

VoNR

VoNR to PSTN

Policy control 

HTTP2

nnrf

PCF

NRF

5G

VoNR

VoNR to PSTN

SM Policy Control Create/Update/Delete

HTTP2

npcf

SMF

PCF

5G

VoNR

VoNR to PSTN

Online Charging 

HTTP2

nsmf

SMF

CHF

5G

VoNR

VoNR to PSTN

Policy control 

HTTP2

nsmf

SMF

PCF

5G

VoNR

VoNR to PSTN

Service Registration

HTTP2

nsmf

SMF

NSSMF

5G

VoNR

VoNR to PSTN

Sm Context Create/Update/Release

HTTP2

nsmf

AMF

SMF

5G

VoNR

VoNR to PSTN

Network Slice Selection

HTTP2

nudm

SMF

UDM

5G

VoNR

VoNR to PSTN

Subscriber Data Management

HTTP2

nudm

SMF

UDM

5G

VoNR

VoNR to PSTN

UE Context Management

HTTP2

nudm

SMF

UDM

5G

VoNR

VoNR to PSTN

DataRepository

HTTP2

nudr

NRF/PCF

UDR

5G

VoNR

VoNR to PSTN

Authentication

NAS-5GS

N1

AMF

UE

5G

VoNR

VoNR to PSTN

DL NAS transport

NAS-5GS

N1

AMF

UE

5G

VoNR

VoNR to PSTN

Identity

NAS-5GS

N1

AMF

UE

5G

VoNR

VoNR to PSTN

PDU session establishment

NAS-5GS

N1

UE

AMF

5G

VoNR

VoNR to PSTN

Security

NAS-5GS

N1

AMF

UE

5G

VoNR

VoNR to PSTN

DownlinkNASTransport

NGAP

N2

AMF

gNB

5G

VoNR

VoNR to PSTN

UplinkNASTransport

NGAP

N2

gNB

AMF

5G

VoNR

VoNR to PSTN

Initial Context Setup

NGAP

N2

AMF

gNB

5G

VoNR

VoNR to PSTN

Initial UE Message

NGAP

N2

gNB

AMF

5G

VoNR

VoNR to PSTN

PDU Session Resource Setup/Modify/Release

NGAP

N2

AMF

gNB

5G

VoNR

VoNR to PSTN

UERadioCapabilityInfoIndication

NGAP

N2

gNB

AMF

5G

VoNR

VoNR to PSTN

PFCP-Session-Establishment/Modification/Deletion

PFCP

N4

SMF

UPF

5G

VoNR

VoNR to PSTN

call Hold

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

5G

VoNR

VoNR to PSTN

MO-Calling party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

5G

VoNR

VoNR to VoLTE

Location-Info

Diameter

Cx

I-CSCF

HSS

5G

VoNR

VoNR to VoLTE

Multimedia Authentication

Diameter

Cx

S-CSCF

HSS

5G

VoNR

VoNR to VoLTE

Server-Assignment

Diameter

Cx

S-CSCF

HSS

5G

VoNR

VoNR to VoLTE

User-Authorization

Diameter

Cx

I-CSCF

HSS

5G

VoNR

VoNR to VoLTE

Policy control 

Diameter

Gx

PGW

PCRF

5G

VoNR

VoNR to VoLTE

Online Charging 

Diameter

Gy

PGW

OCS

5G

VoNR

VoNR to VoLTE

Accounting

Diameter

Gz/Rf

PGW

CDF

5G

VoNR

VoNR to VoLTE

Credit-Control

Diameter

Ro

OCS

TAS

5G

VoNR

VoNR to VoLTE

Authorization Authentication(AAR/AAA)

Diameter

Rx

PCSCF

PCRF

5G

VoNR

VoNR to VoLTE

Session Termination

Diameter

Rx

PCSCF

PCRF

5G

VoNR

VoNR to VoLTE

Re-Authorization (RAR/RAA)

Diameter

Rx

PCSCF

PCRF

5G

VoNR

VoNR to VoLTE

Authentication

Diameter

S6a/S6d

MME

HSS

5G

VoNR

VoNR to VoLTE

Location Update

Diameter

S6a/S6d

MME

HSS

5G

VoNR

VoNR to VoLTE

Authorization Authentication(AAR/AAA)

Diameter

S6b

PGW

AAA

5G

VoNR

VoNR to VoLTE

Session-Termination

Diameter

S6b

PGW

AAA

5G

VoNR

VoNR to VoLTE

Profile-Update

Diameter

Sh

HSS

TAS

5G

VoNR

VoNR to VoLTE

Subscribe-Notifications

Diameter

Sh

TAS

HSS

5G

VoNR

VoNR to VoLTE

User-Data-Request and Answer

Diameter

Sh

HSS

TAS

5G

VoNR

VoNR to VoLTE

Server-Assignment 

Diameter

SWx

AAA

HSS

5G

VoNR

VoNR to VoLTE

Online Charging 

Diameter

Sy

PGW

PCRF

5G

VoNR

VoNR to VoLTE

Spending-Limit

Diameter

Sy

PCRF

OCS

5G

VoNR

VoNR to VoLTE

N1N2MessageTransfer/EBIAssignment

HTTP2

namf

SMF

AMF

5G

VoNR

VoNR to VoLTE

UE Authentications/5g-aka-confirmation

HTTP2

nausf

AMF

AUSF

5G

VoNR

VoNR to VoLTE

BroadForward Binding

HTTP2

nbsf

PCF

BSF

5G

VoNR

VoNR to VoLTE

Policy control function binding

HTTP2

nbsf

PCF

BSF

5G

VoNR

VoNR to VoLTE

Converged charging 

HTTP2

nchf

PCF/SMF

CHF

5G

VoNR

VoNR to VoLTE

Network Function Discovery and Management

HTTP2

nnrf

AUSF/AMF/PCF/SMF

NRF

5G

VoNR

VoNR to VoLTE

Policy control 

HTTP2

nnrf

PCF

NRF

5G

VoNR

VoNR to VoLTE

SM Policy Control Create/Update/Delete

HTTP2

npcf

SMF

PCF

5G

VoNR

VoNR to VoLTE

Online Charging 

HTTP2

nsmf

SMF

CHF

5G

VoNR

VoNR to VoLTE

Policy control 

HTTP2

nsmf

SMF

PCF

5G

VoNR

VoNR to VoLTE

Service Registration

HTTP2

nsmf

SMF

NSSMF

5G

VoNR

VoNR to VoLTE

Sm Context Create/Update/Release

HTTP2

nsmf

AMF

SMF

5G

VoNR

VoNR to VoLTE

Network Slice Selection

HTTP2

nudm

SMF

UDM

5G

VoNR

VoNR to VoLTE

Subscriber Data Management

HTTP2

nudm

SMF

UDM

5G

VoNR

VoNR to VoLTE

UE Context Management

HTTP2

nudm

SMF

UDM

5G

VoNR

VoNR to VoLTE

DataRepository

HTTP2

nudr

NRF/PCF

UDR

5G

VoNR

VoNR to VoLTE

Authentication

NAS-5GS

N1

AMF

UE

5G

VoNR

VoNR to VoLTE

DL NAS transport

NAS-5GS

N1

AMF

UE

5G

VoNR

VoNR to VoLTE

Identity

NAS-5GS

N1

AMF

UE

5G

VoNR

VoNR to VoLTE

PDU session establishment

NAS-5GS

N1

UE

AMF

5G

VoNR

VoNR to VoLTE

Security

NAS-5GS

N1

AMF

UE

5G

VoNR

VoNR to VoLTE

DownlinkNASTransport

NGAP

N2

AMF

gNB

5G

VoNR

VoNR to VoLTE

UplinkNASTransport

NGAP

N2

gNB

AMF

5G

VoNR

VoNR to VoLTE

Initial Context Setup

NGAP

N2

AMF

gNB

5G

VoNR

VoNR to VoLTE

Initial UE Message

NGAP

N2

gNB

AMF

5G

VoNR

VoNR to VoLTE

PDU Session Resource Setup/Modify/Release

NGAP

N2

AMF

gNB

5G

VoNR

VoNR to VoLTE

UERadioCapabilityInfoIndication

NGAP

N2

gNB

AMF

5G

VoNR

VoNR to VoLTE

PFCP-Session-Establishment/Modification/Deletion

PFCP

N4

SMF

UPF

5G

VoNR

VoNR to VoLTE

call Hold

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

5G

VoNR

VoNR to VoLTE

MO-Calling party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

5G

VoNR

VoNR to VoLTE

MT-Called party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

5G

VoNR

VoNR to VoNR

Location-Info

Diameter

Cx

I-CSCF

HSS

5G

VoNR

VoNR to VoNR

Multimedia Authentication

Diameter

Cx

S-CSCF

HSS

5G

VoNR

VoNR to VoNR

Server-Assignment

Diameter

Cx

S-CSCF

HSS

5G

VoNR

VoNR to VoNR

User-Authorization

Diameter

Cx

I-CSCF

HSS

5G

VoNR

VoNR to VoNR

Policy control 

Diameter

Gx

PGW

PCRF

5G

VoNR

VoNR to VoNR

Online Charging 

Diameter

Gy

PGW

OCS

5G

VoNR

VoNR to VoNR

Accounting

Diameter

Gz/Rf

PGW

CDF

5G

VoNR

VoNR to VoNR

Credit-Control

Diameter

Ro

OCS

TAS

5G

VoNR

VoNR to VoNR

Authorization Authentication(AAR/AAA)

Diameter

Rx

PCSCF

PCRF

5G

VoNR

VoNR to VoNR

Session Termination

Diameter

Rx

PCSCF

PCRF

5G

VoNR

VoNR to VoNR

Re-Authorization (RAR/RAA)

Diameter

Rx

PCSCF

PCRF

5G

VoNR

VoNR to VoNR

Authentication

Diameter

S6a/S6d

MME

HSS

5G

VoNR

VoNR to VoNR

Location Update

Diameter

S6a/S6d

MME

HSS

5G

VoNR

VoNR to VoNR

Authorization Authentication(AAR/AAA)

Diameter

S6b

PGW

AAA

5G

VoNR

VoNR to VoNR

Session-Termination

Diameter

S6b

PGW

AAA

5G

VoNR

VoNR to VoNR

Profile-Update

Diameter

Sh

HSS

TAS

5G

VoNR

VoNR to VoNR

Subscribe-Notifications

Diameter

Sh

TAS

HSS

5G

VoNR

VoNR to VoNR

User-Data-Request and Answer

Diameter

Sh

HSS

TAS

5G

VoNR

VoNR to VoNR

Server-Assignment 

Diameter

SWx

AAA

HSS

5G

VoNR

VoNR to VoNR

Online Charging 

Diameter

Sy

PGW

PCRF

5G

VoNR

VoNR to VoNR

Spending-Limit

Diameter

Sy

PCRF

OCS

5G

VoNR

VoNR to VoNR

N1N2MessageTransfer/EBIAssignment

HTTP2

namf

SMF

AMF

5G

VoNR

VoNR to VoNR

UE Authentications/5g-aka-confirmation

HTTP2

nausf

AMF

AUSF

5G

VoNR

VoNR to VoNR

BroadForward Binding

HTTP2

nbsf

PCF

BSF

5G

VoNR

VoNR to VoNR

Policy control function binding

HTTP2

nbsf

PCF

BSF

5G

VoNR

VoNR to VoNR

Converged charging 

HTTP2

nchf

PCF/SMF

CHF

5G

VoNR

VoNR to VoNR

Network Function Discovery and Management

HTTP2

nnrf

AUSF/AMF/PCF/SMF

NRF

5G

VoNR

VoNR to VoNR

Policy control 

HTTP2

nnrf

PCF

NRF

5G

VoNR

VoNR to VoNR

SM Policy Control Create/Update/Delete

HTTP2

npcf

SMF

PCF

5G

VoNR

VoNR to VoNR

Online Charging 

HTTP2

nsmf

SMF

CHF

5G

VoNR

VoNR to VoNR

Policy control 

HTTP2

nsmf

SMF

PCF

5G

VoNR

VoNR to VoNR

Service Registration

HTTP2

nsmf

SMF

NSSMF

5G

VoNR

VoNR to VoNR

Sm Context Create/Update/Release

HTTP2

nsmf

AMF

SMF

5G

VoNR

VoNR to VoNR

Network Slice Selection

HTTP2

nudm

SMF

UDM

5G

VoNR

VoNR to VoNR

Subscriber Data Management

HTTP2

nudm

SMF

UDM

5G

VoNR

VoNR to VoNR

UE Context Management

HTTP2

nudm

SMF

UDM

5G

VoNR

VoNR to VoNR

DataRepository

HTTP2

nudr

NRF/PCF

UDR

5G

VoNR

VoNR to VoNR

Authentication

NAS-5GS

N1

AMF

UE

5G

VoNR

VoNR to VoNR

DL NAS transport

NAS-5GS

N1

AMF

UE

5G

VoNR

VoNR to VoNR

Identity

NAS-5GS

N1

AMF

UE

5G

VoNR

VoNR to VoNR

PDU session establishment

NAS-5GS

N1

UE

AMF

5G

VoNR

VoNR to VoNR

Security

NAS-5GS

N1

AMF

UE

5G

VoNR

VoNR to VoNR

DownlinkNASTransport

NGAP

N2

AMF

gNB

5G

VoNR

VoNR to VoNR

UplinkNASTransport

NGAP

N2

gNB

AMF

5G

VoNR

VoNR to VoNR

Initial Context Setup

NGAP

N2

AMF

gNB

5G

VoNR

VoNR to VoNR

Initial UE Message

NGAP

N2

gNB

AMF

5G

VoNR

VoNR to VoNR

PDU Session Resource Setup/Modify/Release

NGAP

N2

AMF

gNB

5G

VoNR

VoNR to VoNR

UERadioCapabilityInfoIndication

NGAP

N2

gNB

AMF

5G

VoNR

VoNR to VoNR

PFCP-Session-Establishment/Modification/Deletion

PFCP

N4

SMF

UPF

5G

VoNR

VoNR to VoNR

call Hold

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

5G

VoNR

VoNR to VoNR

MO-Calling party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

5G

VoNR

VoNR to VoNR

MT-Called party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF,MSS,SSR,IRPS

4G VoLTE

Technology

Service

Sub Service

Procedure

Protocols

Interface

Network Elements A

Network Elements B

Technology

Service

Sub Service

Procedure

Protocols

Interface

Network Elements A

Network Elements B

4G 

VoLTE

VoLTE Call Conference

MO-Calling party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

VoLTE

VoLTE Call Conference

MT-Called party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

VoLTE

VoLTE Call Conference

Call Forwarding/divert leg

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

VoLTE

VoLTE Call Conference

Call Conference prep leg

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

VoLTE

VoLTE Call Conference

Call Conference server leg

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

VoLTE

VoLTE Call Conference

Call Hold

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

VoLTE

VoLTE Call Conference

Online Charging 

Diameter

Gx

PGW

PCRF

4G 

VoLTE

VoLTE Call Conference

Re-Auth Request/Answer

Diameter

Gx

PGW

PCRF

4G 

VoLTE

VoLTE Call Conference

Online Charging 

Diameter

Gy

PGW

OCS

4G 

VoLTE

VoLTE Call Conference

Re-Auth Request/Answer

Diameter

Gy

PGW

OCS

4G 

VoLTE

VoLTE Call Conference

Online Charging 

Diameter

Sy

PGW

PCRF

4G 

VoLTE

VoLTE Call Conference

Session-Termination Request/Answer

Diameter

Sy

PCRF

OCS

4G 

VoLTE

VoLTE Call Conference

Spending-Limit Request/Answer

Diameter

Sy

PCRF

OCS

4G 

VoLTE

VoLTE Call Conference

Spending-Status-Notification Request/Answer

Diameter

Sy

OCS

PCRF

4G 

VoLTE

VoLTE Call Conference

Location-Info Request/Answer

Diameter

Cx

ICSCF

HSS

4G 

VoLTE

VoLTE Call Conference

Multimedia-Auth Request/Answer

Diameter

Cx

SCSCF

HSS

4G 

VoLTE

VoLTE Call Conference

Registration-Termination Request/Answer

Diameter

Cx

HSS

SCSCF

4G 

VoLTE

VoLTE Call Conference

Server-Assignment Request/Answer

Diameter

Cx

SCSCF

HSS

4G 

VoLTE

VoLTE Call Conference

User-Authorization Request/Answer

Diameter

Cx

ICSCF

HSS

4G 

VoLTE

VoLTE Call Conference

Profile-Update Request/Answer

Diameter

Sh

TAS

HSS

4G 

VoLTE

VoLTE Call Conference

Push-Notification Request/Answer

Diameter

Sh

HSS

TAS

4G 

VoLTE

VoLTE Call Conference

Subscribe-Notifications Request/Answer

Diameter

Sh

TAS

HSS

4G 

VoLTE

VoLTE Call Conference

User-Data Request/Answer

Diameter

Sh

TAS

HSS

4G 

VoLTE

VoLTE Call Conference

User-Data Request/Answer

Diameter

Sp

PCRF

SPR

4G 

VoLTE

VoLTE Call Conference

AA Request/Answer

Diameter

Rx

PCSCF

PCRF

4G 

VoLTE

VoLTE Call Conference

Re-Auth Request/Answer

Diameter

Rx

PCSCF

PCRF

4G 

VoLTE

VoLTE Call Conference

Session-Termination Request/Answer

Diameter

Rx

PCSCF

PCRF

4G 

VoLTE

VoLTE Call Conference

Abort-Session Request/Answer

Diameter

Rx

PCSCF

PCRF

4G 

VoLTE

VoLTE Call Conference

Authentication-Information Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE Call Conference

Cancel-Location Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE Call Conference

Delete-Subscriber-Data Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE Call Conference

Insert-Subscriber-Data Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE Call Conference

Notify Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE Call Conference

Update-Location Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE Call Conference

AA Request/Answer

Diameter

S6b

PGW

AAA

4G 

VoLTE

VoLTE Call Conference

Session-Termination Request/Answer

Diameter

S6b

PGW

AAA

4G 

VoLTE

VoLTE Call Conference

Multimedia-Auth Request/Answer

Diameter

SWx

AAA

HSS

4G 

VoLTE

VoLTE Call Conference

Push-Profile Request/Answer

Diameter

SWx

AAA

HSS

4G 

VoLTE

VoLTE Call Conference

Server-Assignment Request/Answer

Diameter

SWx

AAA

HSS

4G 

VoLTE

VoLTE Call Conference

Accounting

Diameter

Gz/Rf

PGW

CDF

4G 

VoLTE

VoLTE Call Conference

Accounting Request/Answer

Diameter

Rf

TAS

OFCS

4G 

VoLTE

VoLTE Call Conference

Online Charging 

Diameter

Ro

TAS

OCS

4G 

VoLTE

VoLTE Call Conference

Re-Auth Request/Answer

Diameter

Ro

TAS

OCS

4G 

VoLTE

VoLTE Call Conference

Session-Termination

Diameter

IMS

PGW

AAA

4G 

VoLTE

VoLTE Call Conference

AAA

Diameter

IMS

PGW

AAA

4G 

VoLTE

VoLTE Call Conference

Server-Assignment 

Diameter

IMS

AAA

HSS

4G 

VoLTE

VoLTE Call Conference

Create-Bearer-Request/Answer

GTPv2

S11

SGW

MME

4G 

VoLTE

VoLTE Call Conference

Create-Session-Request/Answer

GTPv2

S11

MME

SGW

4G 

VoLTE

VoLTE Call Conference

Delete-Bearer-Request/Answer

GTPv2

S11

SGW

MME

4G 

VoLTE

VoLTE Call Conference

Delete-Session-Request/Answer

GTPv2

S11

MME

SGW

4G 

VoLTE

VoLTE Call Conference

Modify-Bearer-Request/Answer

GTPv2

S11

MME

SGW

4G 

VoLTE

VoLTE Call Conference

Update-Bearer-Request/Answer

GTPv2

S11

SGW

MME

4G 

VoLTE

VoLTE Call Conference

Create-Bearer-Request/Answer

GTPv2

S2b

PGW

ePDG

4G 

VoLTE

VoLTE Call Conference

Create-Session-Request/Answer

GTPv2

S2b

ePDG

PGW

4G 

VoLTE

VoLTE Call Conference

Delete-Bearer-Request/Answer

GTPv2

S2b

PGW

ePDG

4G 

VoLTE

VoLTE Call Conference

Delete-Session-Request/Answer

GTPv2

S2b

ePDG

PGW

4G 

VoLTE

VoLTE Call Conference

Update-Bearer-Request/Answer

GTPv2

S2b

PGW

ePDG

4G 

VoLTE

VoLTE Call Conference

Create-Bearer-Request/Answer

GTPv2

S5

PGW

SGW

4G 

VoLTE

VoLTE Call Conference

Create-Session-Request/Answer

GTPv2

S5

SGW

PGW

4G 

VoLTE

VoLTE Call Conference

Delete-Bearer-Request/Answer

GTPv2

S5

PGW

SGW

4G 

VoLTE

VoLTE Call Conference

Delete-Session-Request/Answer

GTPv2

S5

SGW

PGW

4G 

VoLTE

VoLTE Call Conference

Update-Bearer-Request/Answer

GTPv2

S5

PGW

SGW

4G 

VoLTE

VoLTE Call Conference

Session Establishment

GTPV2

S8

SGW

PGW

4G 

VoLTE

VoLTE Call Conference

Session modification

GTPV2

S8

SGW

PGW

4G 

VoLTE

VoLTE Call Conference

Session termination 

GTPV2

S8

SGW

PGW

4G 

VoLTE

VoLTE Call Conference

Dedicated EPS bearer activation

NAS-EPS

S1-MME

MME

UE

4G 

VoLTE

VoLTE Call Conference

Attach

NAS-EPS

S1-MME

UE

MME

4G 

VoLTE

VoLTE Call Conference

Authentication

NAS-EPS

S1-MME

MME

UE

4G 

VoLTE

VoLTE Call Conference

EPS bearer context request deactivation

NAS-EPS

S1-MME

MME

UE

4G 

VoLTE

VoLTE Call Conference

Detach

NAS-EPS

S1-MME

UE

MME

4G 

VoLTE

VoLTE Call Conference

EPS bearer context request Modify

NAS-EPS

S1-MME

MME

UEa

4G 

VoLTE

VoLTE Call Conference

PDN connectivity

NAS-EPS

S1-MME

UE

MME

4G 

VoLTE

VoLTE Call Conference

Security mode command

NAS-EPS

S1-MME

MME

UE

4G 

VoLTE

VoLTE Call Conference

E_RAB Setup/Modify/Release

S1AP

S1-MME

MME

eNB

4G 

VoLTE

VoLTE Call Conference

InitialContextSetupRequest

S1AP

S1-MME

MME

eNB

4G 

VoLTE

VoLTE Call Conference

initialUEMessage

S1AP

S1-MME

eNB

MME

4G 

VoLTE

VoLTE Call Forward 

MO-Calling party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

VoLTE

VoLTE Call Forward 

MT-Called party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

VoLTE

VoLTE Call Forward 

Call Forwarding/divert leg

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

VoLTE

VoLTE Call Forward 

Call Hold

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

VoLTE

VoLTE Call Forward 

Online Charging 

Diameter

Gx

PGW

PCRF

4G 

VoLTE

VoLTE Call Forward 

Re-Auth Request/Answer

Diameter

Gx

PGW

PCRF

4G 

VoLTE

VoLTE Call Forward 

Online Charging 

Diameter

Gy

PGW

OCS

4G 

VoLTE

VoLTE Call Forward 

Re-Auth Request/Answer

Diameter

Gy

PGW

OCS

4G 

VoLTE

VoLTE Call Forward 

Online Charging 

Diameter

Sy

PGW

PCRF

4G 

VoLTE

VoLTE Call Forward 

Session-Termination Request/Answer

Diameter

Sy

PCRF

OCS

4G 

VoLTE

VoLTE Call Forward 

Spending-Limit Request/Answer

Diameter

Sy

PCRF

OCS

4G 

VoLTE

VoLTE Call Forward 

Spending-Status-Notification Request/Answer

Diameter

Sy

OCS

PCRF

4G 

VoLTE

VoLTE Call Forward 

Location-Info Request/Answer

Diameter

Cx

ICSCF

HSS

4G 

VoLTE

VoLTE Call Forward 

Multimedia-Auth Request/Answer

Diameter

Cx

SCSCF

HSS

4G 

VoLTE

VoLTE Call Forward 

Registration-Termination Request/Answer

Diameter

Cx

HSS

SCSCF

4G 

VoLTE

VoLTE Call Forward 

Server-Assignment Request/Answer

Diameter

Cx

SCSCF

HSS

4G 

VoLTE

VoLTE Call Forward 

User-Authorization Request/Answer

Diameter

Cx

ICSCF

HSS

4G 

VoLTE

VoLTE Call Forward 

Profile-Update Request/Answer

Diameter

Sh

TAS

HSS

4G 

VoLTE

VoLTE Call Forward 

Push-Notification Request/Answer

Diameter

Sh

HSS

TAS

4G 

VoLTE

VoLTE Call Forward 

Subscribe-Notifications Request/Answer

Diameter

Sh

TAS

HSS

4G 

VoLTE

VoLTE Call Forward 

User-Data Request/Answer

Diameter

Sh

TAS

HSS

4G 

VoLTE

VoLTE Call Forward 

User-Data Request/Answer

Diameter

Sp

PCRF

SPR

4G 

VoLTE

VoLTE Call Forward 

AA Request/Answer

Diameter

Rx

PCSCF

PCRF

4G 

VoLTE

VoLTE Call Forward 

Re-Auth Request/Answer

Diameter

Rx

PCSCF

PCRF

4G 

VoLTE

VoLTE Call Forward 

Session-Termination Request/Answer

Diameter

Rx

PCSCF

PCRF

4G 

VoLTE

VoLTE Call Forward 

Abort-Session Request/Answer

Diameter

Rx

PCSCF

PCRF

4G 

VoLTE

VoLTE Call Forward 

Authentication-Information Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE Call Forward 

Cancel-Location Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE Call Forward 

Delete-Subscriber-Data Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE Call Forward 

Insert-Subscriber-Data Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE Call Forward 

Notify Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE Call Forward 

Update-Location Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE Call Forward 

AA Request/Answer

Diameter

S6b

PGW

AAA

4G 

VoLTE

VoLTE Call Forward 

Session-Termination Request/Answer

Diameter

S6b

PGW

AAA

4G 

VoLTE

VoLTE Call Forward 

Multimedia-Auth Request/Answer

Diameter

SWx

AAA

HSS

4G 

VoLTE

VoLTE Call Forward 

Push-Profile Request/Answer

Diameter

SWx

AAA

HSS

4G 

VoLTE

VoLTE Call Forward 

Server-Assignment Request/Answer

Diameter

SWx

AAA

HSS

4G 

VoLTE

VoLTE Call Forward 

Accounting

Diameter

Gz/Rf

PGW

CDF

4G 

VoLTE

VoLTE Call Forward 

Accounting Request/Answer

Diameter

Rf

TAS

OFCS

4G 

VoLTE

VoLTE Call Forward 

Online Charging 

Diameter

Ro

TAS

OCS

4G 

VoLTE

VoLTE Call Forward 

Re-Auth Request/Answer

Diameter

Ro

TAS

OCS

4G 

VoLTE

VoLTE Call Forward 

Session-Termination

Diameter

IMS

PGW

AAA

4G 

VoLTE

VoLTE Call Forward 

AAA

Diameter

IMS

PGW

AAA

4G 

VoLTE

VoLTE Call Forward 

Server-Assignment 

Diameter

IMS

AAA

HSS

4G 

VoLTE

VoLTE Call Forward 

Create-Bearer-Request/Answer

GTPv2

S11

SGW

MME

4G 

VoLTE

VoLTE Call Forward 

Create-Session-Request/Answer

GTPv2

S11

MME

SGW

4G 

VoLTE

VoLTE Call Forward 

Delete-Bearer-Request/Answer

GTPv2

S11

SGW

MME

4G 

VoLTE

VoLTE Call Forward 

Delete-Session-Request/Answer

GTPv2

S11

MME

SGW

4G 

VoLTE

VoLTE Call Forward 

Modify-Bearer-Request/Answer

GTPv2

S11

MME

SGW

4G 

VoLTE

VoLTE Call Forward 

Update-Bearer-Request/Answer

GTPv2

S11

SGW

MME

4G 

VoLTE

VoLTE Call Forward 

Create-Bearer-Request/Answer

GTPv2

S2b

PGW

ePDG

4G 

VoLTE

VoLTE Call Forward 

Create-Session-Request/Answer

GTPv2

S2b

ePDG

PGW

4G 

VoLTE

VoLTE Call Forward 

Delete-Bearer-Request/Answer

GTPv2

S2b

PGW

ePDG

4G 

VoLTE

VoLTE Call Forward 

Delete-Session-Request/Answer

GTPv2

S2b

ePDG

PGW

4G 

VoLTE

VoLTE Call Forward 

Update-Bearer-Request/Answer

GTPv2

S2b

PGW

ePDG

4G 

VoLTE

VoLTE Call Forward 

Create-Bearer-Request/Answer

GTPv2

S5

PGW

SGW

4G 

VoLTE

VoLTE Call Forward 

Create-Session-Request/Answer

GTPv2

S5

SGW

PGW

4G 

VoLTE

VoLTE Call Forward 

Delete-Bearer-Request/Answer

GTPv2

S5

PGW

SGW

4G 

VoLTE

VoLTE Call Forward 

Delete-Session-Request/Answer

GTPv2

S5

SGW

PGW

4G 

VoLTE

VoLTE Call Forward 

Update-Bearer-Request/Answer

GTPv2

S5

PGW

SGW

4G 

VoLTE

VoLTE Call Forward 

Session Establishment

GTPV2

S8

SGW

PGW

4G 

VoLTE

VoLTE Call Forward 

Session modification

GTPV2

S8

SGW

PGW

4G 

VoLTE

VoLTE Call Forward 

Session termination 

GTPV2

S8

SGW

PGW

4G 

VoLTE

VoLTE Call Forward 

Dedicated EPS bearer activation

NAS-EPS

S1-MME

MME

UE

4G 

VoLTE

VoLTE Call Forward 

Attach

NAS-EPS

S1-MME

UE

MME

4G 

VoLTE

VoLTE Call Forward 

Authentication

NAS-EPS

S1-MME

MME

UE

4G 

VoLTE

VoLTE Call Forward 

EPS bearer context request deactivation

NAS-EPS

S1-MME

MME

UE

4G 

VoLTE

VoLTE Call Forward 

Detach

NAS-EPS

S1-MME

UE

MME

4G 

VoLTE

VoLTE Call Forward 

EPS bearer context request Modify

NAS-EPS

S1-MME

MME

UEa

4G 

VoLTE

VoLTE Call Forward 

PDN connectivity

NAS-EPS

S1-MME

UE

MME

4G 

VoLTE

VoLTE Call Forward 

Security mode command

NAS-EPS

S1-MME

MME

UE

4G 

VoLTE

VoLTE Call Forward 

E_RAB Setup/Modify/Release

S1AP

S1-MME

MME

eNB

4G 

VoLTE

VoLTE Call Forward 

InitialContextSetupRequest

S1AP

S1-MME

MME

eNB

4G 

VoLTE

VoLTE Call Forward 

initialUEMessage

S1AP

S1-MME

eNB

MME

4G 

VoLTE

VoLTE to VoLTE

MO-Calling party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

VoLTE

VoLTE to VoLTE

MT-Called party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

VoLTE

VoLTE to VoLTE

Call Hold

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

VoLTE

VoLTE to VoLTE

Online Charging 

Diameter

Gx

PGW

PCRF

4G 

VoLTE

VoLTE to VoLTE

Re-Auth Request/Answer

Diameter

Gx

PGW

PCRF

4G 

VoLTE

VoLTE to VoLTE

Online Charging 

Diameter

Gy

PGW

OCS

4G 

VoLTE

VoLTE to VoLTE

Re-Auth Request/Answer

Diameter

Gy

PGW

OCS

4G 

VoLTE

VoLTE to VoLTE

Online Charging 

Diameter

Sy

PGW

PCRF

4G 

VoLTE

VoLTE to VoLTE

Session-Termination Request/Answer

Diameter

Sy

PCRF

OCS

4G 

VoLTE

VoLTE to VoLTE

Spending-Limit Request/Answer

Diameter

Sy

PCRF

OCS

4G 

VoLTE

VoLTE to VoLTE

Spending-Status-Notification Request/Answer

Diameter

Sy

OCS

PCRF

4G 

VoLTE

VoLTE to VoLTE

Location-Info Request/Answer

Diameter

Cx

ICSCF

HSS

4G 

VoLTE

VoLTE to VoLTE

Multimedia-Auth Request/Answer

Diameter

Cx

SCSCF

HSS

4G 

VoLTE

VoLTE to VoLTE

Registration-Termination Request/Answer

Diameter

Cx

HSS

SCSCF

4G 

VoLTE

VoLTE to VoLTE

Server-Assignment Request/Answer

Diameter

Cx

SCSCF

HSS

4G 

VoLTE

VoLTE to VoLTE

User-Authorization Request/Answer

Diameter

Cx

ICSCF

HSS

4G 

VoLTE

VoLTE to VoLTE

Profile-Update Request/Answer

Diameter

Sh

TAS

HSS

4G 

VoLTE

VoLTE to VoLTE

Push-Notification Request/Answer

Diameter

Sh

HSS

TAS

4G 

VoLTE

VoLTE to VoLTE

Subscribe-Notifications Request/Answer

Diameter

Sh

TAS

HSS

4G 

VoLTE

VoLTE to VoLTE

User-Data Request/Answer

Diameter

Sh

TAS

HSS

4G 

VoLTE

VoLTE to VoLTE

User-Data Request/Answer

Diameter

Sp

PCRF

SPR

4G 

VoLTE

VoLTE to VoLTE

AA Request/Answer

Diameter

Rx

PCSCF

PCRF

4G 

VoLTE

VoLTE to VoLTE

Re-Auth Request/Answer

Diameter

Rx

PCSCF

PCRF

4G 

VoLTE

VoLTE to VoLTE

Session-Termination Request/Answer

Diameter

Rx

PCSCF

PCRF

4G 

VoLTE

VoLTE to VoLTE

Abort-Session Request/Answer

Diameter

Rx

PCSCF

PCRF

4G 

VoLTE

VoLTE to VoLTE

Authentication-Information Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE to VoLTE

Cancel-Location Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE to VoLTE

Delete-Subscriber-Data Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE to VoLTE

Insert-Subscriber-Data Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE to VoLTE

Notify Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE to VoLTE

Update-Location Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE to VoLTE

AA Request/Answer

Diameter

S6b

PGW

AAA

4G 

VoLTE

VoLTE to VoLTE

Session-Termination Request/Answer

Diameter

S6b

PGW

AAA

4G 

VoLTE

VoLTE to VoLTE

Multimedia-Auth Request/Answer

Diameter

SWx

AAA

HSS

4G 

VoLTE

VoLTE to VoLTE

Push-Profile Request/Answer

Diameter

SWx

AAA

HSS

4G 

VoLTE

VoLTE to VoLTE

Server-Assignment Request/Answer

Diameter

SWx

AAA

HSS

4G 

VoLTE

VoLTE to VoLTE

Accounting

Diameter

Gz/Rf

PGW

CDF

4G 

VoLTE

VoLTE to VoLTE

Accounting Request/Answer

Diameter

Rf

TAS

OFCS

4G 

VoLTE

VoLTE to VoLTE

Online Charging 

Diameter

Ro

TAS

OCS

4G 

VoLTE

VoLTE to VoLTE

Re-Auth Request/Answer

Diameter

Ro

TAS

OCS

4G 

VoLTE

VoLTE to VoLTE

Session-Termination

Diameter

IMS

PGW

AAA

4G 

VoLTE

VoLTE to VoLTE

AAA

Diameter

IMS

PGW

AAA

4G 

VoLTE

VoLTE to VoLTE

Server-Assignment 

Diameter

IMS

AAA

HSS

4G 

VoLTE

VoLTE to VoLTE

Create-Bearer-Request/Answer

GTPv2

S11

SGW

MME

4G 

VoLTE

VoLTE to VoLTE

Create-Session-Request/Answer

GTPv2

S11

MME

SGW

4G 

VoLTE

VoLTE to VoLTE

Delete-Bearer-Request/Answer

GTPv2

S11

SGW

MME

4G 

VoLTE

VoLTE to VoLTE

Delete-Session-Request/Answer

GTPv2

S11

MME

SGW

4G 

VoLTE

VoLTE to VoLTE

Modify-Bearer-Request/Answer

GTPv2

S11

MME

SGW

4G 

VoLTE

VoLTE to VoLTE

Update-Bearer-Request/Answer

GTPv2

S11

SGW

MME

4G 

VoLTE

VoLTE to VoLTE

Create-Bearer-Request/Answer

GTPv2

S2b

PGW

ePDG

4G 

VoLTE

VoLTE to VoLTE

Create-Session-Request/Answer

GTPv2

S2b

ePDG

PGW

4G 

VoLTE

VoLTE to VoLTE

Delete-Bearer-Request/Answer

GTPv2

S2b

PGW

ePDG

4G 

VoLTE

VoLTE to VoLTE

Delete-Session-Request/Answer

GTPv2

S2b

ePDG

PGW

4G 

VoLTE

VoLTE to VoLTE

Update-Bearer-Request/Answer

GTPv2

S2b

PGW

ePDG

4G 

VoLTE

VoLTE to VoLTE

Create-Bearer-Request/Answer

GTPv2

S5

PGW

SGW

4G 

VoLTE

VoLTE to VoLTE

Create-Session-Request/Answer

GTPv2

S5

SGW

PGW

4G 

VoLTE

VoLTE to VoLTE

Delete-Bearer-Request/Answer

GTPv2

S5

PGW

SGW

4G 

VoLTE

VoLTE to VoLTE

Delete-Session-Request/Answer

GTPv2

S5

SGW

PGW

4G 

VoLTE

VoLTE to VoLTE

Update-Bearer-Request/Answer

GTPv2

S5

PGW

SGW

4G 

VoLTE

VoLTE to VoLTE

Session Establishment

GTPV2

S8

SGW

PGW

4G 

VoLTE

VoLTE to VoLTE

Session modification

GTPV2

S8

SGW

PGW

4G 

VoLTE

VoLTE to VoLTE

Session termination 

GTPV2

S8

SGW

PGW

4G 

VoLTE

VoLTE to VoLTE

Dedicated EPS bearer activation

NAS-EPS

S1-MME

MME

UE

4G 

VoLTE

VoLTE to VoLTE

Attach

NAS-EPS

S1-MME

UE

MME

4G 

VoLTE

VoLTE to VoLTE

Authentication

NAS-EPS

S1-MME

MME

UE

4G 

VoLTE

VoLTE to VoLTE

EPS bearer context request deactivation

NAS-EPS

S1-MME

MME

UE

4G 

VoLTE

VoLTE to VoLTE

Detach

NAS-EPS

S1-MME

UE

MME

4G 

VoLTE

VoLTE to VoLTE

EPS bearer context request Modify

NAS-EPS

S1-MME

MME

UEa

4G 

VoLTE

VoLTE to VoLTE

PDN connectivity

NAS-EPS

S1-MME

UE

MME

4G 

VoLTE

VoLTE to VoLTE

Security mode command

NAS-EPS

S1-MME

MME

UE

4G 

VoLTE

VoLTE to VoLTE

E_RAB Setup/Modify/Release

S1AP

S1-MME

MME

eNB

4G 

VoLTE

VoLTE to VoLTE

InitialContextSetupRequest

S1AP

S1-MME

MME

eNB

4G 

VoLTE

VoLTE to VoLTE

initialUEMessage

S1AP

S1-MME

eNB

MME

4G 

VoLTE

VoLTE to VoLTE

MO-Calling party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

VoLTE

VoLTE to VoLTE

MT-Called party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

VoLTE

VoLTE to VoLTE

Call Forwarding/divert leg

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

VoLTE

VoLTE to VoLTE

Call Hold

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

VoLTE

VoLTE to VoLTE

Online Charging 

Diameter

Gx

PGW

PCRF

4G 

VoLTE

VoLTE to VoLTE

Re-Auth Request/Answer

Diameter

Gx

PGW

PCRF

4G 

VoLTE

VoLTE to VoLTE

Online Charging 

Diameter

Gy

PGW

OCS

4G 

VoLTE

VoLTE to VoLTE

Re-Auth Request/Answer

Diameter

Gy

PGW

OCS

4G 

VoLTE

VoLTE to VoLTE

Online Charging 

Diameter

Sy

PGW

PCRF

4G 

VoLTE

VoLTE to VoLTE

Session-Termination Request/Answer

Diameter

Sy

PCRF

OCS

4G 

VoLTE

VoLTE to VoLTE

Spending-Limit Request/Answer

Diameter

Sy

PCRF

OCS

4G 

VoLTE

VoLTE to VoLTE

Spending-Status-Notification Request/Answer

Diameter

Sy

OCS

PCRF

4G 

VoLTE

VoLTE to VoLTE

Location-Info Request/Answer

Diameter

Cx

ICSCF

HSS

4G 

VoLTE

VoLTE to VoLTE

Multimedia-Auth Request/Answer

Diameter

Cx

SCSCF

HSS

4G 

VoLTE

VoLTE to VoLTE

Registration-Termination Request/Answer

Diameter

Cx

HSS

SCSCF

4G 

VoLTE

VoLTE to VoLTE

Server-Assignment Request/Answer

Diameter

Cx

SCSCF

HSS

4G 

VoLTE

VoLTE to VoLTE

User-Authorization Request/Answer

Diameter

Cx

ICSCF

HSS

4G 

VoLTE

VoLTE to VoLTE

Profile-Update Request/Answer

Diameter

Sh

TAS

HSS

4G 

VoLTE

VoLTE to VoLTE

Push-Notification Request/Answer

Diameter

Sh

HSS

TAS

4G 

VoLTE

VoLTE to VoLTE

Subscribe-Notifications Request/Answer

Diameter

Sh

TAS

HSS

4G 

VoLTE

VoLTE to VoLTE

User-Data Request/Answer

Diameter

Sh

TAS

HSS

4G 

VoLTE

VoLTE to VoLTE

User-Data Request/Answer

Diameter

Sp

PCRF

SPR

4G 

VoLTE

VoLTE to VoLTE

AA Request/Answer

Diameter

Rx

PCSCF

PCRF

4G 

VoLTE

VoLTE to VoLTE

Re-Auth Request/Answer

Diameter

Rx

PCSCF

PCRF

4G 

VoLTE

VoLTE to VoLTE

Session-Termination Request/Answer

Diameter

Rx

PCSCF

PCRF

4G 

VoLTE

VoLTE to VoLTE

Abort-Session Request/Answer

Diameter

Rx

PCSCF

PCRF

4G 

VoLTE

VoLTE to VoLTE

Authentication-Information Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE to VoLTE

Cancel-Location Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE to VoLTE

Delete-Subscriber-Data Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE to VoLTE

Insert-Subscriber-Data Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE to VoLTE

Notify Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE to VoLTE

Update-Location Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE to VoLTE

AA Request/Answer

Diameter

S6b

PGW

AAA

4G 

VoLTE

VoLTE to VoLTE

Session-Termination Request/Answer

Diameter

S6b

PGW

AAA

4G 

VoLTE

VoLTE to VoLTE

Multimedia-Auth Request/Answer

Diameter

SWx

AAA

HSS

4G 

VoLTE

VoLTE to VoLTE

Push-Profile Request/Answer

Diameter

SWx

AAA

HSS

4G 

VoLTE

VoLTE to VoLTE

Server-Assignment Request/Answer

Diameter

SWx

AAA

HSS

4G 

VoLTE

VoLTE to VoLTE

Accounting

Diameter

Gz/Rf

PGW

CDF

4G 

VoLTE

VoLTE to VoLTE

Accounting Request/Answer

Diameter

Rf

TAS

OFCS

4G 

VoLTE

VoLTE to VoLTE

Online Charging 

Diameter

Ro

TAS

OCS

4G 

VoLTE

VoLTE to VoLTE

Re-Auth Request/Answer

Diameter

Ro

TAS

OCS

4G 

VoLTE

VoLTE to VoLTE

Session-Termination

Diameter

IMS

PGW

AAA

4G 

VoLTE

VoLTE to VoLTE

AAA

Diameter

IMS

PGW

AAA

4G 

VoLTE

VoLTE to VoLTE

Server-Assignment 

Diameter

IMS

AAA

HSS

4G 

VoLTE

VoLTE to VoLTE

Create-Bearer-Request/Answer

GTPv2

S11

SGW

MME

4G 

VoLTE

VoLTE to VoLTE

Create-Session-Request/Answer

GTPv2

S11

MME

SGW

4G 

VoLTE

VoLTE to VoLTE

Delete-Bearer-Request/Answer

GTPv2

S11

SGW

MME

4G 

VoLTE

VoLTE to VoLTE

Delete-Session-Request/Answer

GTPv2

S11

MME

SGW

4G 

VoLTE

VoLTE to VoLTE

Modify-Bearer-Request/Answer

GTPv2

S11

MME

SGW

4G 

VoLTE

VoLTE to VoLTE

Update-Bearer-Request/Answer

GTPv2

S11

SGW

MME

4G 

VoLTE

VoLTE to VoLTE

Create-Bearer-Request/Answer

GTPv2

S2b

PGW

ePDG

4G 

VoLTE

VoLTE to VoLTE

Create-Session-Request/Answer

GTPv2

S2b

ePDG

PGW

4G 

VoLTE

VoLTE to VoLTE

Delete-Bearer-Request/Answer

GTPv2

S2b

PGW

ePDG

4G 

VoLTE

VoLTE to VoLTE

Delete-Session-Request/Answer

GTPv2

S2b

ePDG

PGW

4G 

VoLTE

VoLTE to VoLTE

Update-Bearer-Request/Answer

GTPv2

S2b

PGW

ePDG

4G 

VoLTE

VoLTE to VoLTE

Create-Bearer-Request/Answer

GTPv2

S5

PGW

SGW

4G 

VoLTE

VoLTE to VoLTE

Create-Session-Request/Answer

GTPv2

S5

SGW

PGW

4G 

VoLTE

VoLTE to VoLTE

Delete-Bearer-Request/Answer

GTPv2

S5

PGW

SGW

4G 

VoLTE

VoLTE to VoLTE

Delete-Session-Request/Answer

GTPv2

S5

SGW

PGW

4G 

VoLTE

VoLTE to VoLTE

Update-Bearer-Request/Answer

GTPv2

S5

PGW

SGW

4G 

VoLTE

VoLTE to VoLTE

Session Establishment

GTPV2

S8

SGW

PGW

4G 

VoLTE

VoLTE to VoLTE

Session modification

GTPV2

S8

SGW

PGW

4G 

VoLTE

VoLTE to VoLTE

Session termination 

GTPV2

S8

SGW

PGW

4G 

VoLTE

VoLTE to VoLTE

Dedicated EPS bearer activation

NAS-EPS

S1-MME

MME

UE

4G 

VoLTE

VoLTE to VoLTE

Attach

NAS-EPS

S1-MME

UE

MME

4G 

VoLTE

VoLTE to VoLTE

Authentication

NAS-EPS

S1-MME

MME

UE

4G 

VoLTE

VoLTE to VoLTE

EPS bearer context request deactivation

NAS-EPS

S1-MME

MME

UE

4G 

VoLTE

VoLTE to VoLTE

Detach

NAS-EPS

S1-MME

UE

MME

4G 

VoLTE

VoLTE to VoLTE

EPS bearer context request Modify

NAS-EPS

S1-MME

MME

UEa

4G 

VoLTE

VoLTE to VoLTE

PDN connectivity

NAS-EPS

S1-MME

UE

MME

4G 

VoLTE

VoLTE to VoLTE

Security mode command

NAS-EPS

S1-MME

MME

UE

4G 

VoLTE

VoLTE to VoLTE

E_RAB Setup/Modify/Release

S1AP

S1-MME

MME

eNB

4G 

VoLTE

VoLTE to VoLTE

InitialContextSetupRequest

S1AP

S1-MME

MME

eNB

4G 

VoLTE

VoLTE to VoLTE

initialUEMessage

S1AP

S1-MME

eNB

MME

4G 

VoLTE

VoLTE to PSTN

MO-Calling party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

VoLTE

VoLTE to PSTN

Call Hold

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

VoLTE

VoLTE to PSTN

Online Charging 

Diameter

Gx

PGW

PCRF

4G 

VoLTE

VoLTE to PSTN

Re-Auth Request/Answer

Diameter

Gx

PGW

PCRF

4G 

VoLTE

VoLTE to PSTN

Online Charging 

Diameter

Gy

PGW

OCS

4G 

VoLTE

VoLTE to PSTN

Re-Auth Request/Answer

Diameter

Gy

PGW

OCS

4G 

VoLTE

VoLTE to PSTN

Online Charging 

Diameter

Sy

PGW

PCRF

4G 

VoLTE

VoLTE to PSTN

Session-Termination Request/Answer

Diameter

Sy

PCRF

OCS

4G 

VoLTE

VoLTE to PSTN

Spending-Limit Request/Answer

Diameter

Sy

PCRF

OCS

4G 

VoLTE

VoLTE to PSTN

Spending-Status-Notification Request/Answer

Diameter

Sy

OCS

PCRF

4G 

VoLTE

VoLTE to PSTN

Location-Info Request/Answer

Diameter

Cx

ICSCF

HSS

4G 

VoLTE

VoLTE to PSTN

Multimedia-Auth Request/Answer

Diameter

Cx

SCSCF

HSS

4G 

VoLTE

VoLTE to PSTN

Registration-Termination Request/Answer

Diameter

Cx

HSS

SCSCF

4G 

VoLTE

VoLTE to PSTN

Server-Assignment Request/Answer

Diameter

Cx

SCSCF

HSS

4G 

VoLTE

VoLTE to PSTN

User-Authorization Request/Answer

Diameter

Cx

ICSCF

HSS

4G 

VoLTE

VoLTE to PSTN

Profile-Update Request/Answer

Diameter

Sh

TAS

HSS

4G 

VoLTE

VoLTE to PSTN

Push-Notification Request/Answer

Diameter

Sh

HSS

TAS

4G 

VoLTE

VoLTE to PSTN

Subscribe-Notifications Request/Answer

Diameter

Sh

TAS

HSS

4G 

VoLTE

VoLTE to PSTN

User-Data Request/Answer

Diameter

Sh

TAS

HSS

4G 

VoLTE

VoLTE to PSTN

User-Data Request/Answer

Diameter

Sp

PCRF

SPR

4G 

VoLTE

VoLTE to PSTN

AA Request/Answer

Diameter

Rx

PCSCF

PCRF

4G 

VoLTE

VoLTE to PSTN

Re-Auth Request/Answer

Diameter

Rx

PCSCF

PCRF

4G 

VoLTE

VoLTE to PSTN

Session-Termination Request/Answer

Diameter

Rx

PCSCF

PCRF

4G 

VoLTE

VoLTE to PSTN

Abort-Session Request/Answer

Diameter

Rx

PCSCF

PCRF

4G 

VoLTE

VoLTE to PSTN

Authentication-Information Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE to PSTN

Cancel-Location Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE to PSTN

Delete-Subscriber-Data Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE to PSTN

Insert-Subscriber-Data Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE to PSTN

Notify Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE to PSTN

Update-Location Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE to PSTN

AA Request/Answer

Diameter

S6b

PGW

AAA

4G 

VoLTE

VoLTE to PSTN

Session-Termination Request/Answer

Diameter

S6b

PGW

AAA

4G 

VoLTE

VoLTE to PSTN

Multimedia-Auth Request/Answer

Diameter

SWx

AAA

HSS

4G 

VoLTE

VoLTE to PSTN

Push-Profile Request/Answer

Diameter

SWx

AAA

HSS

4G 

VoLTE

VoLTE to PSTN

Server-Assignment Request/Answer

Diameter

SWx

AAA

HSS

4G 

VoLTE

VoLTE to PSTN

Accounting

Diameter

Gz/Rf

PGW

CDF

4G 

VoLTE

VoLTE to PSTN

Accounting Request/Answer

Diameter

Rf

TAS

OFCS

4G 

VoLTE

VoLTE to PSTN

Online Charging 

Diameter

Ro

TAS

OCS

4G 

VoLTE

VoLTE to PSTN

Re-Auth Request/Answer

Diameter

Ro

TAS

OCS

4G 

VoLTE

VoLTE to PSTN

Session-Termination

Diameter

IMS

PGW

AAA

4G 

VoLTE

VoLTE to PSTN

AAA

Diameter

IMS

PGW

AAA

4G 

VoLTE

VoLTE to PSTN

Server-Assignment 

Diameter

IMS

AAA

HSS

4G 

VoLTE

VoLTE to PSTN

Create-Bearer-Request/Answer

GTPv2

S11

SGW

MME

4G 

VoLTE

VoLTE to PSTN

Create-Session-Request/Answer

GTPv2

S11

MME

SGW

4G 

VoLTE

VoLTE to PSTN

Delete-Bearer-Request/Answer

GTPv2

S11

SGW

MME

4G 

VoLTE

VoLTE to PSTN

Delete-Session-Request/Answer

GTPv2

S11

MME

SGW

4G 

VoLTE

VoLTE to PSTN

Modify-Bearer-Request/Answer

GTPv2

S11

MME

SGW

4G 

VoLTE

VoLTE to PSTN

Update-Bearer-Request/Answer

GTPv2

S11

SGW

MME

4G 

VoLTE

VoLTE to PSTN

Create-Bearer-Request/Answer

GTPv2

S2b

PGW

ePDG

4G 

VoLTE

VoLTE to PSTN

Create-Session-Request/Answer

GTPv2

S2b

ePDG

PGW

4G 

VoLTE

VoLTE to PSTN

Delete-Bearer-Request/Answer

GTPv2

S2b

PGW

ePDG

4G 

VoLTE

VoLTE to PSTN

Delete-Session-Request/Answer

GTPv2

S2b

ePDG

PGW

4G 

VoLTE

VoLTE to PSTN

Update-Bearer-Request/Answer

GTPv2

S2b

PGW

ePDG

4G 

VoLTE

VoLTE to PSTN

Create-Bearer-Request/Answer

GTPv2

S5

PGW

SGW

4G 

VoLTE

VoLTE to PSTN

Create-Session-Request/Answer

GTPv2

S5

SGW

PGW

4G 

VoLTE

VoLTE to PSTN

Delete-Bearer-Request/Answer

GTPv2

S5

PGW

SGW

4G 

VoLTE

VoLTE to PSTN

Delete-Session-Request/Answer

GTPv2

S5

SGW

PGW

4G 

VoLTE

VoLTE to PSTN

Update-Bearer-Request/Answer

GTPv2

S5

PGW

SGW

4G 

VoLTE

VoLTE to PSTN

Session Establishment

GTPV2

S8

SGW

PGW

4G 

VoLTE

VoLTE to PSTN

Session modification

GTPV2

S8

SGW

PGW

4G 

VoLTE

VoLTE to PSTN

Session termination 

GTPV2

S8

SGW

PGW

4G 

VoLTE

VoLTE to PSTN

Dedicated EPS bearer activation

NAS-EPS

S1-MME

MME

UE

4G 

VoLTE

VoLTE to PSTN

Attach

NAS-EPS

S1-MME

UE

MME

4G 

VoLTE

VoLTE to PSTN

Authentication

NAS-EPS

S1-MME

MME

UE

4G 

VoLTE

VoLTE to PSTN

EPS bearer context request deactivation

NAS-EPS

S1-MME

MME

UE

4G 

VoLTE

VoLTE to PSTN

Detach

NAS-EPS

S1-MME

UE

MME

4G 

VoLTE

VoLTE to PSTN

EPS bearer context request Modify

NAS-EPS

S1-MME

MME

UEa

4G 

VoLTE

VoLTE to PSTN

PDN connectivity

NAS-EPS

S1-MME

UE

MME

4G 

VoLTE

VoLTE to PSTN

Security mode command

NAS-EPS

S1-MME

MME

UE

4G 

VoLTE

VoLTE to PSTN

E_RAB Setup/Modify/Release

S1AP

S1-MME

MME

eNB

4G 

VoLTE

VoLTE to PSTN

InitialContextSetupRequest

S1AP

S1-MME

MME

eNB

4G 

VoLTE

VoLTE to PSTN

initialUEMessage

S1AP

S1-MME

eNB

MME

4G 

VoLTE

VoLTE to PSTN

MO-Calling party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

VoLTE

VoLTE to PSTN

MT-Called party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

VoLTE

VoLTE to PSTN

Call Forwarding/divert leg

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

VoLTE

VoLTE to PSTN

Call Hold

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

VoLTE

VoLTE to PSTN

Online Charging 

Diameter

Gx

PGW

PCRF

4G 

VoLTE

VoLTE to PSTN

Re-Auth Request/Answer

Diameter

Gx

PGW

PCRF

4G 

VoLTE

VoLTE to PSTN

Online Charging 

Diameter

Gy

PGW

OCS

4G 

VoLTE

VoLTE to PSTN

Re-Auth Request/Answer

Diameter

Gy

PGW

OCS

4G 

VoLTE

VoLTE to PSTN

Online Charging 

Diameter

Sy

PGW

PCRF

4G 

VoLTE

VoLTE to PSTN

Session-Termination Request/Answer

Diameter

Sy

PCRF

OCS

4G 

VoLTE

VoLTE to PSTN

Spending-Limit Request/Answer

Diameter

Sy

PCRF

OCS

4G 

VoLTE

VoLTE to PSTN

Spending-Status-Notification Request/Answer

Diameter

Sy

OCS

PCRF

4G 

VoLTE

VoLTE to PSTN

Location-Info Request/Answer

Diameter

Cx

ICSCF

HSS

4G 

VoLTE

VoLTE to PSTN

Multimedia-Auth Request/Answer

Diameter

Cx

SCSCF

HSS

4G 

VoLTE

VoLTE to PSTN

Registration-Termination Request/Answer

Diameter

Cx

HSS

SCSCF

4G 

VoLTE

VoLTE to PSTN

Server-Assignment Request/Answer

Diameter

Cx

SCSCF

HSS

4G 

VoLTE

VoLTE to PSTN

User-Authorization Request/Answer

Diameter

Cx

ICSCF

HSS

4G 

VoLTE

VoLTE to PSTN

Profile-Update Request/Answer

Diameter

Sh

TAS

HSS

4G 

VoLTE

VoLTE to PSTN

Push-Notification Request/Answer

Diameter

Sh

HSS

TAS

4G 

VoLTE

VoLTE to PSTN

Subscribe-Notifications Request/Answer

Diameter

Sh

TAS

HSS

4G 

VoLTE

VoLTE to PSTN

User-Data Request/Answer

Diameter

Sh

TAS

HSS

4G 

VoLTE

VoLTE to PSTN

User-Data Request/Answer

Diameter

Sp

PCRF

SPR

4G 

VoLTE

VoLTE to PSTN

AA Request/Answer

Diameter

Rx

PCSCF

PCRF

4G 

VoLTE

VoLTE to PSTN

Re-Auth Request/Answer

Diameter

Rx

PCSCF

PCRF

4G 

VoLTE

VoLTE to PSTN

Session-Termination Request/Answer

Diameter

Rx

PCSCF

PCRF

4G 

VoLTE

VoLTE to PSTN

Abort-Session Request/Answer

Diameter

Rx

PCSCF

PCRF

4G 

VoLTE

VoLTE to PSTN

Authentication-Information Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE to PSTN

Cancel-Location Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE to PSTN

Delete-Subscriber-Data Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE to PSTN

Insert-Subscriber-Data Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE to PSTN

Notify Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE to PSTN

Update-Location Request/Answer

Diameter

S6a/S6d

MME

HSS

4G 

VoLTE

VoLTE to PSTN

AA Request/Answer

Diameter

S6b

PGW

AAA

4G 

VoLTE

VoLTE to PSTN

Session-Termination Request/Answer

Diameter

S6b

PGW

AAA

4G 

VoLTE

VoLTE to PSTN

Multimedia-Auth Request/Answer

Diameter

SWx

AAA

HSS

4G 

VoLTE

VoLTE to PSTN

Push-Profile Request/Answer

Diameter

SWx

AAA

HSS

4G 

VoLTE

VoLTE to PSTN

Server-Assignment Request/Answer

Diameter

SWx

AAA

HSS

4G 

VoLTE

VoLTE to PSTN

Accounting

Diameter

Gz/Rf

PGW

CDF

4G 

VoLTE

VoLTE to PSTN

Accounting Request/Answer

Diameter

Rf

TAS

OFCS

4G 

VoLTE

VoLTE to PSTN

Online Charging 

Diameter

Ro

TAS

OCS

4G 

VoLTE

VoLTE to PSTN

Re-Auth Request/Answer

Diameter

Ro

TAS

OCS

4G 

VoLTE

VoLTE to PSTN

Session-Termination

Diameter

IMS

PGW

AAA

4G 

VoLTE

VoLTE to PSTN

AAA

Diameter

IMS

PGW

AAA

4G 

VoLTE

VoLTE to PSTN

Server-Assignment 

Diameter

IMS

AAA

HSS

4G 

VoLTE

VoLTE to PSTN

Create-Bearer-Request/Answer

GTPv2

S11

SGW

MME

4G 

VoLTE

VoLTE to PSTN

Create-Session-Request/Answer

GTPv2

S11

MME

SGW

4G 

VoLTE

VoLTE to PSTN

Delete-Bearer-Request/Answer

GTPv2

S11

SGW

MME

4G 

VoLTE

VoLTE to PSTN

Delete-Session-Request/Answer

GTPv2

S11

MME

SGW

4G 

VoLTE

VoLTE to PSTN

Modify-Bearer-Request/Answer

GTPv2

S11

MME

SGW

4G 

VoLTE

VoLTE to PSTN

Update-Bearer-Request/Answer

GTPv2

S11

SGW

MME

4G 

VoLTE

VoLTE to PSTN

Create-Bearer-Request/Answer

GTPv2

S2b

PGW

ePDG

4G 

VoLTE

VoLTE to PSTN

Create-Session-Request/Answer

GTPv2

S2b

ePDG

PGW

4G 

VoLTE

VoLTE to PSTN

Delete-Bearer-Request/Answer

GTPv2

S2b

PGW

ePDG

4G 

VoLTE

VoLTE to PSTN

Delete-Session-Request/Answer

GTPv2

S2b

ePDG

PGW

4G 

VoLTE

VoLTE to PSTN

Update-Bearer-Request/Answer

GTPv2

S2b

PGW

ePDG

4G 

VoLTE

VoLTE to PSTN

Create-Bearer-Request/Answer

GTPv2

S5

PGW

SGW

4G 

VoLTE

VoLTE to PSTN

Create-Session-Request/Answer

GTPv2

S5

SGW

PGW

4G 

VoLTE

VoLTE to PSTN

Delete-Bearer-Request/Answer

GTPv2

S5

PGW

SGW

4G 

VoLTE

VoLTE to PSTN

Delete-Session-Request/Answer

GTPv2

S5

SGW

PGW

4G 

VoLTE

VoLTE to PSTN

Update-Bearer-Request/Answer

GTPv2

S5

PGW

SGW

4G 

VoLTE

VoLTE to PSTN

Session Establishment

GTPV2

S8

SGW

PGW

4G 

VoLTE

VoLTE to PSTN

Session modification

GTPV2

S8

SGW

PGW

4G 

VoLTE

VoLTE to PSTN

Session termination 

GTPV2

S8

SGW

PGW

4G 

VoLTE

VoLTE to PSTN

Dedicated EPS bearer activation

NAS-EPS

S1-MME

MME

UE

4G 

VoLTE

VoLTE to PSTN

Attach

NAS-EPS

S1-MME

UE

MME

4G 

VoLTE

VoLTE to PSTN

Authentication

NAS-EPS

S1-MME

MME

UE

4G 

VoLTE

VoLTE to PSTN

EPS bearer context request deactivation

NAS-EPS

S1-MME

MME

UE

4G 

VoLTE

VoLTE to PSTN

Detach

NAS-EPS

S1-MME

UE

MME

4G 

VoLTE

VoLTE to PSTN

EPS bearer context request Modify

NAS-EPS

S1-MME

MME

UEa

4G 

VoLTE

VoLTE to PSTN

PDN connectivity

NAS-EPS

S1-MME

UE

MME

4G 

VoLTE

VoLTE to PSTN

Security mode command

NAS-EPS

S1-MME

MME

UE

4G 

VoLTE

VoLTE to PSTN

E_RAB Setup/Modify/Release

S1AP

S1-MME

MME

eNB

4G 

VoLTE

VoLTE to PSTN

InitialContextSetupRequest

S1AP

S1-MME

MME

eNB

4G 

VoLTE

VoLTE to PSTN

initialUEMessage

S1AP

S1-MME

eNB

MME

4G 

VoLTE

VoLTE to PSTN (with geolocation)

Attach request, PDN connectivity request

S1AP

S1-MME

eNodeB

MME

4G 

VoLTE

VoLTE to PSTN (with geolocation)

Extended Service Request

S1AP

S1-MME

eNodeB

MME

4G E911

Technology

Service

Sub Service

Procedure

Protocols

Interface

Network Elements A

Network Elements B

Technology

Service

Sub Service

Procedure

Protocols

Interface

Network Elements A

Network Elements B

4G 

E911

 

Calling party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

E911

 

Called party establishment 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

E911

 

Call Forwarding leg

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

E911

 

Registration 

SIP

IMS

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

P,S,I-CSCF,MTAS,BGCF,MRFC,MGCF

4G 

E911

 

Online Charging 

Diameter

Gx

PGW

PCRF

4G 

E911

 

Online Charging 

Diameter

Gy

PGW

OCS

4G 

E911

 

Online Charging 

Diameter

Sy

PGW

PCRF

4G

E911

 

Location info

Diameter

Cx

HSS

ICSCF

4G

E911

 

User-Authorization

Diameter

Cx

ICSCF

HSS

4G

E911

 

Accounting

Diameter

Gz/Rf

TAS

OFCS

4G

E911

 

AAA

Diameter

Rx

PCSCF

PCRF

4G

E911

 

Authentication

Diameter

Rx

PCRF

PCSCF

4G

E911

 

Session-Termination

Diameter

Rx

PCSCF

PCRF

4G

E911

 

User Data

Diameter

Sh

TAS

HSS

4G

E911

 

Profile-Update

Diameter

Sh

TAS

HSS

4G

E911

 

Profile-Update

Diameter

Sh

TAS

HSS

4G 

E911

 

Session Establishment

GTPV2

S11

MME

SGW

4G 

E911

 

Session Establishment

GTPV2

S8

SGW

PGW

4G 

E911

 

Registration 

SIP

IMS

UE

P,S,I-CSCF

4G 

E911

 

NAS Signalling

S1AP

S1-MME

enodeB

MME

4G 

E911

 

Ciphered

S1AP

S1-MME

enodeB

MME

4G 

E911

 

CSFB Triggering

S1AP

S1-MME

enodeB

MME

4G 

E911

 

Mobile Location Protocol

MLP

Le/L1

UE

LocServerMLP

4G 

E911

 

User Plane Location Protocol

ULP

Lup/Ua

UE

LocServerULP

4G 

E911

 

LCS Application Protocol

LCSAP

SLs

MME

E-SMLC

4G 

E911

 

DNS Query

DNS

IMS

UE

DNS-Server

4G 

E911

 

User Plane Traffic

RTP

IMS

UE

AGW

4G 

E911

 

TCP link UP/DOWN control

TCP

TCP

Ribbon911GW

COMTECH-ECS