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5G ConvergenceBroadband Forum 5G Work Overview and Status Update

Manuel PaulSenior Expert, Deutsche Telekom AG

Broadband Forum 5G Project Stream LeadBroadband Forum Board Member

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Broadband Forum 5G work overview

• 5G Fixed Mobile Convergence Use of common 5G Core across Wireline & Wireless Access Networks– Integration: access directly to 5G core with full operational integration– Interworking: subscriber access to 5G Core componentsSupporting coexistence of 5G & legacy services on a common access network

• 5G Fixed Access and TransportBackhaul & Fronthaul: Access and transportRouting & Transport: enhancements for 5G covering capacity, performance reliability & determinism

• Network Slicing, applied to the above areas

CloudCO/ Local

datacenters

5G Mobile/WirelineConverged Transport

Data Center Data CenterInterconnect

Professional Building Multi-Dwelling /

CloudCO

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5G Fixed Mobile Convergence

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Specific Deliverables of the BBF 5G-FMC Project

• Provide recommendations for 5G system architectural & functional integration− related to convergence items identified during the joint 3GPP-BBF Workshop in 2017

• Devise migration and coexistence strategies− Meeting operator requirements for direct connection to the 5G core, as well as for

interworking of existing users and deployed equipment into a 5G core

• Specify − a 5G Access Gateway Function (AGF) that adapts the wireline access onto the 5G core− Several architectural deployment options as well as underlying infrastructure aspects− Further related aspects as they become identified over the course of this work

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High Level Architecture

NG RAN

Wireline Access Node

WirelineCore Network

DataNetwork

5GAGF

5GRG

5GFMIF

RG

5G ConvergedCore Network

Interworking

Co-existence

5GRG

Standalone

UserPlane

ControlPlane

N2 & N3

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High Level Architecture- and elements to be standardized

NG RAN

Wireline Access Node

WirelineCore Network

DataNetwork

5GAGF

5GRG

5GFMIF

RG

5G ConvergedCore Network

Interworking

Co-existence

5GRG

Standalone

UserPlane

ControlPlane

N2 & N3

Generalized Approach agreed in the BBF

BBF Specified Items 3GPP Specified Items

User Equipment Relay

Fixed Mobile Interworking Function

Any support for Legacy Services by 5G Core

Access Gateway Function

Wireline Control & Data Plane transport

Customer premises changes for wireline

5G Residential Gatewayand CPE Management

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BBF 5G FMC - Work in Progress

• SD*-407 / SD-420 5G Fixed Mobile Convergence– SD-407: Root document & repository for ongoing 5G-FMC study work

• Subject Areas: Integrated, FWA, Interworking, Hybrid, UE Relay– SD-420-R1: containing recommendations distilled from SD-407 to 3GPP (externally liaised)

• First revision released per Jan15th: key issues + proposed solutions• New revisions to follow as further subject areas mature and conclude

Liaisons with 3GPP SA2, ITU-T SG13/JCA IMT-2020

• SD-406 End-to-End Network Slicing– Ecosystem analysis nearly complete– Potential internal and external handover points being worked out Liaisons with 3GPP SA5, GSMA, ITU-T SG13/JCA IMT-2020, 3GPP RAN3

*SD (Study Document) is the BBF’s terminology for work being developed as the source of the membership work

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Service model dependent key issues• Session management• Addressing for IPv4 and IPv6, • Home LAN support• QoS

Service model independent key issues • Registration & Connection management procedures• Transport and Encapsulation in the Access• Regulatory Requirements• Operational requirements• Resource management in the access• IPTV and multicast• Network Slice Selection

Structured per service models and deployment scenarios

Plan to provide next extract of recommendations to 3GPP by July’18

BBF 5G FMC Work – Content of SD-407

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2020+

2019

2017/18

Up to 2016

BBF 5G FMC - Standardization TimetableGoal

Common Core Network across Wireline and Wireless Access Networks

3GPPNormative Work

5G Ph 2 - R16

BBFNormative Work

5G

3GPPNormative Work

5G Ph 1 - R15

3GPPStudy Work

5G Ph 2 - R15

BBFExisting TRs

BBF5G Studies

FMCIssue List

3GPPStudy Work

5G Ph 1 - R14

BBFSD-407/SD-4205G FMC

• Session Management• RG authentication• QoS• Etc..

Recommendations to integrate fixed components with 3GPP defined 5G interfaces.Intermediate “Sync” with 3GPP

Specifies new Access Gateway Function and modifications on RG, ACS, Access Nodes, etc.

BBFSD-406

Net SlicingRecommendations to use network slicing in fixed and FMC networks

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BBF 5G FMC - Standardization Process

• Collaboration with 3GPP– Kickoff in February 2017 at joint 3GPP-BBF workshop in Dubrovnik– Parallel Studies & Coordination - aligned with 3GPP Release 16 Timeline

• BBF SD-407 5G Fixed Mobile Convergence Study• 3GPP 5WWC 5G Wireless Wireline Convergence Study• 3GPP ATSSS Access Traffic Steering, Switching and Splitting Study

Studies expected to be completed by 2018Q4, with specification work starting before year end

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5G Transport

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5G Transport: Where have we come from?

HDLC TNL

HDLC TNL

Note: one BS can support multiple TNLSs. One Cell Site Gateway can connect multiple BSs.

Mobile Aggregation

Site Gateway (MASG)

IP TNL

ATM TNL

TDM TNL

IP TNL

ATM TNL

TDM TNL

Aggregationnetwork

[1]

[2]

BS

Access Aggregation

[3]

Access networkxDSL,

microwave,Leased Line,

GPON,Pt-to-pt fiber

Access Node

Cell SIteGateway(CSG)

Edge Node

Core

Iur

Abis

A

Iub

Iub

Iub

RC

MPLS transport network

MPLS-awareequipment

Gb

Iu-PS

Iu-CSA

AbisMSC 3G

SGSN 3G

SGSN 2G

MSC 2G

a)

b)

c)

PEPE

PE PE

PE PE

P

P

[4] Abis

Abis

TNL PW or TNL LSP

T-PE S-PE

T-PET-PE S-PE Pe)

f)

Edge Node

Edge Node

Edge Node

P

P

P

P

d)PE PEP P P

P

Iub

Gb

SS-PW

MS-PWT-PE

Overlay model based on L2VPN in Aggregationnetwork could be supportedfor each scenario betweenMPLS routers

RC

IP/MPLS Core

networkIu-CS

Iu-PS

MPLS in Mobile Backhaul Initiative (MMBI) Reference Architecture - ~2007-2015

From 2G to

“LTE-A”

HDLC TNL

HDLC TNL

Note: one BS can support multiple TNLSs. One Cell Site Gateway can connect multiple BSs.

Mobile Aggregation Site Gateway (MASG)

IP TNL

ATM TNL

TDM TNL

IP TNL

ATM TNL

TDM TNL

Aggregation network

[1]

[2]

BS

Access

Aggregation

[3]

Access network

xDSL, microwave,

Leased Line,

GPON,

Pt-to-pt fiber

Access Node

Cell SIte Gateway(CSG)

Edge Node

Core

Iur

Abis

A

Iub

Iub

Iub

RC

MPLS transport network

MPLS-aware equipment

Gb

Iu-PS

Iu-CS

A

Abis

a)

b)

c)

PE

PE

PE

PE

PE

PE

P

P

[4]

Abis

Abis

TNL PW or TNL LSP

T-PE

S-PE

T-PE

T-PE

S-PE

P

e)

f)

Edge Node

Edge Node

Edge Node

P

P

P

P

d)

P

P

Iub

Gb

SS-PW

MS-PW

T-PE

Overlay model based on L2VPN in Aggregation network could be supported for each scenario between MPLS routers

RC

IP/MPLS Core network

Iu-CS

Iu-PS

MSC 3G

SGSN 3G

SGSN 2G

MSC 2G

PE

PE

P

P

*

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5G Transport: Where are we going?To meet needs of 5G we must integrate the functions below into what we have today• SDN • Segment Routing• Service Function Chaining• Ethernet VPN• Deterministic Transport

• IEEE TSN• IETF DetNet• FlexE

• Virtualization• Faster speeds,

higher capacity• Intelligent management

& orchestration

IP TNL

MSC

PDN GW

SGSN

HSS

IP TNL

IP TNL

IP TNLAccess

Network

AggregationNetwork

Edge Node

Access NodeCSG1Abis

CSG2

lub

AccessNetwork

CSG3

BTS

NB

eNB S1/X2

Edge Node BSC,

RNC, MME

or S-GW

CoreNetwork

a/LUc S

S5/S8S3/S4/Gb/luPS

a/LUc S

Mobile AggregationSite Gateway

4VPLS

CSG1CSG2CSG3

CSG1CSG2CSG3

EthEth VPLS

Eth

Eth

Eth

Eth

Eth

VPLS

H-VPLS

VPWSEth

Spoke PWsCSG1CSG2CSG3

CSG1CSG2CSG3 VPWS

Eth PW

VSI

Cell Site Gateway

L2VPN MPLS transport network solutions

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5G Transport - Standardization Timetable

GoalTransport supporting 5G demands and capabilities

3GPPNormative Work

5G Ph 2 - R16

2020+

2019

3GPPNormative Work

5G Ph 1 - R15

3GPPStudy Work

5G Ph 2 - R15

BBFExisting Work

TR-350, TR-221 (Amd.1&2)

2017/18

3GPPStudy Work

5G Ph 1 - R14Up to 2016

IEEE, IETF, SG15, MEF

5G Work

Protocols, Specs.,Timing &

Syncronisation Recs

IEEE standards.IETF RFC

ITU SG15 SyncMEF Services

BBF5G Study and Normative

TRs/MRsSDs

Based on 3GPP Rel15 and beyond

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Broadband Forum5G Work

• Work is operator-driven & based on use cases• Converged Core Network Functions and Interfaces• Common infrastructure (transport and cloud)• Network Slicing• Transport: new capabilities to support advanced 5G services

(higher speeds, deterministic transport)

• Timeline of BBF work aligned with 5G industry roadmap• Cooperation with peer SDO and industry fora• Interaction and Coordination with the ITU-T

• On the IMT-2020 roadmap with the JCA IMT-2020• On FMC with JCA IMT-2020, potential for SG13 (Q23/13) to coordinate• On transport & synchronization for 5G Back-&Fronthaul with SG15 (WP3/15) • On the use of optical access technology (e.g., NGPON-2) with SG15 (WP1/15)

Summary

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more at broadband-forum.org/5G

5G ConvergenceBroadband Forum 5G work overview5G Fixed Mobile ConvergenceSpecific Deliverables of the BBF 5G-FMC ProjectHigh Level ArchitectureHigh Level ArchitectureBBF 5G FMC - Work in ProgressFoliennummer 8BBF 5G FMC - Standardization TimetableBBF 5G FMC - Standardization Process5G Transport5G Transport: Where have we come from?Foliennummer 135G Transport - Standardization Timetable���Broadband Forum� 5G WorkFoliennummer 16