Evolution of Convergence in 5G Wireless and Wireline Networks

Delve into the world of 5G Wireless Wireline Convergence (WWC) through a detailed exploration of guiding principles, convergence scenarios, roadmap, and phases. Discover how the convergence roadmap from 2017 to 2023 outlines the smooth migration path and transformation in both wireline access and core networks. Explore the published phases, upcoming developments, and the expansion of addressable markets in the evolving landscape of 5G convergence.

• 5G Networks
• Convergence Scenarios
• Evolution
• Wireline Access
• 5G Phases

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1. WWC Work Area January 2022 Introduction to 5G Wireless Wireline Convergence

2. 5G WWC - Guiding Principles Smooth Migration Path Wireline Access Network Full Support Transformation 5G Introduction Core Network Loose Coupling and minimal impacts between Access Network and Core Network Maximize Addressable Market 2

3. Convergence Scenarios 5G-RG (FWA) (TR-124) Radio Access Network (3GPP) 5G-RG 5G Core (Control Plane, User Plane, Services) (3GPP TS 23.501 etc.) (Hybrid Access) (TR-124) UP ---- CP (WT- 458) 5G Wireline AGF (WT-456) Home Device 5G-RG (Wired) (TR-124) Data Network(s) Home Device Home Device Wireline Access Network (TR-101 family, TR-178) 5G FMIF (WT-457) FN-RG (Wired - Legacy) (TR-124) FN-RG BNG (Wired - Legacy) (TR-124) (TR-92, TR-101, TR-178) 3

4. Convergence Roadmap 2017 2018 2019 2020 2021 2022 2023 WWC 16.3 WT-457, WT-458 WWC 16.2 WT-456i2, WT-470i2, TR-124i7, TR-181 WWC 16.1 IMS for 5G-RG WT-Business IMS for 5G-RG WT-Residential WT-456, WT-470, TR-124i6, TR-181 WWC Study SD-407 IMS for 5G-RG Study IETF 5WE (RFC 8822) Joint BBF/3GPP Workshop Release 18 Release 17 WWC Specs Functional Freeze Release 16 5G Phase 2 WWC Studies Functional Freeze Release 15 5G Phase 1 4

5. WWC phase 1 - Published in July 2020 together with R16 from 3GPP - Includes TR-456 Issue 1, TR-470 Issue 1, TR-124 Issue 6, TR-181 - KISS minimum viable product High running FN-RG support cases: Single IP session PPPoE or IPoE Single access 5G-RG, either wireline or FWA CPE, CPE management, AGF and overall architecture 5

6. WWC phase 2 TR-456 Issue 2, TR-470 Issue 2, TR-124 Issue 7, TR-181 Scheduled to be published in March 2022, based on R16 Content: unlock value, expand addressable market, refine specifications Multi-access scenarios, ATSSS, resilience, bandwidth aggregation Expand FN-RG support; multi session FMIF requirements to pull BNGs into the over all architecture (missed phase 2) CUPS to expand deployment options (missed phase 2) Deferred to be continued in phase 3: WT-457: FMIF functional requirements WT-458: CUPS for AGF 6

7. WWC phase 3, status January 2022 Need to finalize: - WT-457: FMIF functional requirements - WT-458: AGF for CUPS New Project launched: - Voice: IMS for 5G-RG Other potential items: - To be discussed in the phase 3 new items session 7

8. TR-470: 5G WWC architecture Issue 1, published July 2020 The 5G WWC architecture includes the set of functions and interfaces that realizes the use cases targeted by the BBF and 3GPP for the 3GPP Release 16, including network functions for adapting wireline access onto the 5G Core. Issue 2, scheduled to be published in March 2022 (Ballot Voting in progress) Addition of: - Multiple IP session support for FN-RGs - Additional authentication in the form of PAP/CHAP support for FN-RGs - Extensions to RG-LWAC - Use cases, clarification and guidance Issue 3 It will be updated via cross-referencing other TR, for example referencing the WT from project IMS for 5G-RG or WT-458 for AGF CUPS 8

9. TR-456: AGF functional requirements Issue 1, published July 2020 Migration in between FN-RG and 5G-RG Single PDU session support for FN-RG 1:1 double tag VLAN model support for 5G-RG Issue 2, scheduled to be published March 2022 (Ballot Voting in progress) Additional authentication in the form of PAP/CHAP support for FN-RGs Support for FN-RG Static IPv4 Addressing Updates to VSNP procedures; NAS and AS messaging. Fixes, clarifications and additional guidance for improved interoperability. Issue 3 It will be updated via cross-referencing other TR, for example referencing WT-458 for the AGF CUPS call flows or cross-referencing the WT from project IMS for 5G-RG 9

10. 5G RG Support Phase 1 Integration with 5G Core control plane based on NAS/ N1 interface over Y4 Wireline CP and UP aspects for 1:1 VLAN model FWA 5G QoS TR-069/TR-181 updates to manage and operate 5G RG Phase 2 NR and LTE radio support (optional) Hybrid Access Multi-Access support with traffic bonding and access steering More TR-181 updates for enhanced CPE features Phase 3 IMS support for 5G-RGs (separate project) Support for 3GPP Procedures in the Home Ethernet services N:1 VLAN support Other (TBD) 10

11. FN-RG Support Phase 1 AGF basic operation for a routed FN-RG PPPoE or IPoE operations with IPv4 and/or IPv6 access Single PDU session Credential-less authentication (line ID is the coin of the realm) Phase 2 Multiple PDU sessions PAP/CHAP authentication support Potential for Phase 3 FMIF specification 11

12. Other Aspects Phase 1 RG-LWAC data structure key to mapping 5QI to wireline QOS Global Line ID(GLI) used for FN-RG authentication, location Other 5G operational issues, DHCP support, PEI etc. Phase 2 and Phase 3 Network exposure CUPS Corrections, and specification hardening (robustness and interoperability) Topics have emerged ad-hoc, DSCP handling, MTU issues, back off timers etc. 12

13. WWC Ways of Working How do we agree on the topics to progress? Use cases help We vetted a list as part of the phase 1/phase 2/phase 3 process: see 5G WWC Phase 3 How do we discuss progressing topics to eventual settlement Bi-weekly conference calls Email discussions(wwc-5g@broadband-forum.org) Tiger Teams and comments on the Tiger Team wiki pages How do we communicate proposals to settle content Contributions that socialize solutions, or propose document edits Wiki either via comment, direct editing, or capture of contribution interim conclusions How do we capture settled content Updates to the WT as a work in progress by the editors to capture agreement proposals How do we finalize the WT Straw ballot process for comments, final ballot is go/nogo sanity check

14. BBF DocumentationStyle WT-470i1/i2 Rosetta Stone Non-normative descriptions of how this all hangs together and where things are specified TR-124i6/i7 CPE Requirements 5G support defined as a series of requirements modules for a-la-carte adoption WT-456i3 & WT-457 AGF/FMIF requirements Hybrid of BBF requirements style and 3GPP call flows illustrating BBF specifics and calling out 3GPP specs as needed WT-458: CUPS for AGF Will contain call flow specific for AGF-u and AGF-C Will take input from TR-456 issue 2 TR-181 CPE management model Theory of operation with a machine compliable model definition. Example IPv4oE FN-RG procedure 14

15. Key WWC Topics for Q1 2022 WT-458: AGF CUPS WT-457: FMIF functional requirements Project IMS for 5G-RG New items for Phase 3

16. Webinars We recently did multiple Webinars And are working on the next one Replay and slides are available Webinar 1, Intro to WWC Slidedeck: https://drive.google.com/file/d/1CyaE_8r96u2KZidKzoX9a-PlQ0PKZFYv/view?usp=sharing Recording: https://drive.google.com/file/d/134ajDhYwOAAmzFgZztSyVpHu-wbg3YLq/view?usp=sharing Webinar 2, 'Bringing New 5G Services Inside the Home with 5G-Residential Gateways' Slidedeck: https://drive.google.com/file/d/1NzHfD9I3jHGe1PVdoSR286T532hUndya/view?usp=sharing Recording: https://drive.google.com/file/d/1EcIxtyMEJstKveE8MWI92XYom16jfPGJ/view?usp=sharing Enjoy!

17. Document References BBF (Members only - Requires login/password. Sign up here https://organizer.broadband-forum.org/users/sign_up) Wiki for 5G project stream (includes minutes of meetings) https://wiki.broadband-forum.org/display/BBF/5G+Project+Stream SD-407 Study on 5G WWC https://issues.broadband-forum.org/browse/CONTRIB-20777 TR-456 AGF Requirements https://issues.broadband-forum.org/browse/CONTRIB-22523 WT-457 FMIF Requirements https://issues.broadband-forum.org/browse/CONTRIB-21169 WT-458 AGF CUPS https://issues.broadband-forum.org/browse/CONTRIB-21163 TR-470 WWC Architectural Overview https://issues.broadband-forum.org/browse/CONTRIB-22524 MD-427 Convergence White Paper https://www.broadband-forum.org/marketing/download/mktgdocs/MR-427.pdf (PUBLIC) MD-464 5G Migration of Fixed Access White Paper https://wiki.broadband-forum.org/display/BBF/MD-464+Migrating+Fixed+Access+to+5G+core RG related Wiki https://wiki.broadband-forum.org/display/BBF/5G+Working+Text+Workspace IETF RFC8822 5G FMC UP Encapsulation https://datatracker.ietf.org/doc/html/rfc8822 3GPP 23.501 System Architecture of 5GS https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3144# 23.502 Procedures for 5GS https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3145# 23.716 Study on WWC https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3249# 23.316 WWC access in 5GS https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3576# 17

18. Getting Involved at BBF Quarterly Meetings WWC Biweekly Technical Calls Every 2nd Thursday between f2f meetings 10am to 12pm EST / NY Time Zoom web meeting WWC Biweekly Marketing Calls Alternating Thursdays with the technical calls 10am to 11am EST/ NY Time Zoom web meeting https://wiki.broadband- forum.org/display/BBF/WWC+Calendar 18

19. Thank You. 19

20. Acronyms AGF ATSSS CUPS FMIF 5G-RG FN-RG NG RAN NAS PDU UE W-AN WWC 5WE 5G Access Gateway Function Access Traffic Steering, Switching & Splitting Control and User Plane Separation Fixed Mobile Interworking Function 5G Residential Gateway Fixed Network Residential Gateway Next Generation / 5G Radio Access Network Non Access Stratum Protocol Data Unit User Equipment Wireline Access Network Wireline Wireless Convergence 5G WWC User Plane Encapsulation Protocol 20