Presented by: For:

© ETSI 2018

04.7.2018

Study on Future System Architecture

Thomas CHATELETTR 103 459 Rapporteur

ETSI Workshop “Developing the Future Radio for Rail Transport”

© ETSI 2018 2

Agenda

Objective of the TR

Presentation of the Reference Architecture

Open points

Focus on regulatory aspects

© ETSI 2018

A Study on Future System

Architecture?

© ETSI 2018 4

Technical Report 103 459 - Study on system architecture

Objectives of the Work Item

Provide a reference model of FRMCS system architecture from a functional point of view

Provide a high level description of the functions that address FRMCS requirements (as specified by FRMCS URS and resulting Use Cases)

Define internal and external boundaries of the FRMCS system (e.g. transport versus applications, external systems and networks, etc.)

Define further potential steps

© ETSI 2018 5

Technical Report 103 459 - Study on system architecture

Methodology

Analysis of the user applications, requirements and use cases

Modelling of a reference architecture based on existing 3GPP functional domains

Discussion on architectural considerations (e.g. choice of 3GPP functional building block)

Definition of FRMCS Reference Points, interfaces and interactions of network functions

Definition of external FRMCS interfaces for GSM-R interworking and interconnect with other legacy systems (e.g. ETCS)

© ETSI 2018

FRMCS Reference

Model

© ETSI 2018 7

High Level functional layers

FRMCS Communication Services

Railway Applications

FRMCS Transport Services

Railway Services

© ETSI 2018 8

Reference model of the FRMCS System

Access (Radio, Fixed)

Core

FRMCS Supporting & Enabling Services

Railway Services

CommunicationEndpoints

CommunicationControl

FRM

CS

Application

FRMCS User

FRMCS Client

Railway Application ControlData

Railway Application

FRMCSNon-MCX enabled

UE (3GPP, other)

Session Control & Management

FRM

CS

Application

FRMCS User

FRMCS Client

Railway Application

FRMCSTransportServices

No FRMCS CommunicationService support

FRMCS Communication Services support with FRMCS user and identity

Railway Application

Railway Services

Railway Applications

FRMCSCommunicationServices

UE (3GPP, other) UE (3GPP, other)

FRMCS Transport Adaptation (FFS)

© ETSI 2018 9

FRMCS functional architecture

Session Control & Management

Core

Fixed Network IP based

3GPP RANs(LTE, 5G NR, ..)

non-3GPP RANs(WiFi, SatCom, ..)

Air Interface

UE UE UE UE

Transport Adaptation (FFS)

Voice Services DataServices

VideoServices

SecurityServices

PresenceServices

PriorityServices

GroupCommunication Suppl. Services Functional

Aliases

FRMCS Supporting & Enabling Services

ConfigurationManagement

Key Management

LocationServices

RecordingServices

Trackside Applications Network ApplicationsOnboard Applications

Cab RadioVoice Services

M2M / IoTServer

DispatcherStation

ETCS / ATO TracksideETCS Handsets

GPH/OPH/OPSDevices/Sensors

AR, M2M, IoTCameras

CCTV TMSATO Smart WaysideObjects

REC DispatcherServices

Railway Services RailwayAddressing Follow Me / LDA Operational

Voice

FRMCS User FRMCS User FRMCS User FRMCS User FRMCS User FRMCS User FRMCS User FRMCS User FRMCS User FRMCS User FRMCS User

Rai

lway

Appl

icat

ions

FRMCS Client FRMCS Client FRMCS Client FRMCS Client FRMCS Client FRMCS Client FRMCS Client FRMCS Client FRMCS Client FRMCS Client FRMCS Client

GSM-RNSS

GSM-R BSS

Other FRMCSNetworks

PLMN (IMS, Legacy,…)

PDN, …

LocationProviders

RecordingManagement

Air Interface

Inte

r-wor

king

Inte

r-wor

king

GSM-R UE

GSM-RIN Services

© ETSI 2018 10

On-board reference architecture

Toa

FRMCS Gateway

3GPP Radio Access Non 3GPP Radio Access

FRMCS System

FRM

CS

onbo

ard

sub-

syst

em

RailwayApplication

MMI

RailwayApplication

Human

FRMCS ClientFRMCS Client

MMI man machine interface

Onboard communication networkToaToa

Toa Reference point between onboard applications and FRMCS Gateway

3GPP UE (MT) Non-3GPP UE (MT)Tue Tue

Tue Reference point between FRMCS Gatewayand UEs

© ETSI 2018 11

Functional example: Railway Emergency Call

Trackside Applications Network ApplicationsOnboard Applications

Cab RadioVoice Services

M2M / IoTServer

DispatcherStation

ETCS / ATO TracksideETCS Handsets

GPH/OPH/OPSDevices/Sensors

AR, M2M, IoTCameras

CCTV TMSATO Smart WaysideObjects

GSM-RNSS

Session Control & Management

Core

Fixed Network IP based

GSM-R BSS

Voice Services DataServices

VideoServices

REC

SecurityServices

PresenceServices

PriorityServices

DispatcherServices

Other FRMCSNetworks

PLMN (IMS, Legacy,…)

PDN, …

Railway Services

GroupCommunication Suppl. Services Functional

Aliases

FRMCS Supporting & Enabling Services

LocationProviders

RailwayAddressing Follow Me / LDA Operational

Voice

RecordingManagement

Air Interface

ConfigurationManagement

Key Management

FRMCS User FRMCS User FRMCS User FRMCS User FRMCS User FRMCS User FRMCS User FRMCS User FRMCS User FRMCS User FRMCS User

Inte

r-wor

king

Inte

r-wor

king

LocationServices

RecordingServices

GSM-R UE

3GPP RANs(LTE, 5G NR, ..)

non-3GPP RANs(WiFi, SatCom, ..)

Air Interface

UE UE UE UE

Rai

lway

Appl

icat

ions

GSM-RIN Services

FRMCS Client FRMCS Client FRMCS Client FRMCS Client FRMCS Client FRMCS Client FRMCS Client FRMCS Client FRMCS Client FRMCS Client FRMCS Client

Transport Adaptation (FFS)

Cab RadioVoice Services

DispatcherStation

HandsetsGPH/OPH/OPS

REC

PresenceServices

PriorityServices

GroupCommunication

ConfigurationManagement

LocationServices

RecordingServices

Train driver invokes a REC

© ETSI 2018

Open points

© ETSI 2018 13

Discussions in the drafting group

Open points

For data centric Railway Applications (e.g. ETCS or ATO): MC data functions and features / or plain data pipe?

QoS management: E-UTRAN / or 5G-NR?

Need for E2E Network Slicing / or precursors (e.g. DCN, DECOR, eDECOR)?

Registration, service selection and routing in the signalling control plane: SIP Core / or IMS?

Communication recording: UE based / or centralised?

© ETSI 2018

Focus on regulatory

aspects

© ETSI 2018 15

ETSI Standards in support of Railway Interoperability

Technical Specification for Interoperability

Control Command and Signalling TSI currently mandates GSM-R… and FRMCS bearer flexibility in the future

Regulatory framework necessary for coordinated migration for Infrastructure Managers and Railway Undertakings

Definition of technology and protocols needed for the interface between FRMCS and ETCS

Flexible / future-proof approach neededETCS installed base to be considered in migration strategy

Cybersecurity framework to be considered as well

© ETSI 2018 16

Thanks for your attention