5G Wireless Wireline Convergence User Plane Encapsulation (5WE)
draft-allan-5g-fmc-encapsulation-03
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Internet Draft Dave Allan, Ericsson ed.
Intended status: Informational Donald Eastlake, Futurewei
Expires: September 2020 David Woolley, Telstra
March 2020
5G Wireless Wireline Convergence User Plane Encapsulation (5WE)
draft-allan-5g-fmc-encapsulation-03
Abstract
As part of providing wireline access to the 5G Core (5GC), deployed
wireline networks carry user data between 5G residential gateways
and the 5G Access Gateway Function (AGF). The encapsulation used
needs to meet a variety of requirements including being able to
multiplex the traffic of multiple PDU sessions within a VLAN
delineated access circuit, to permit legacy equipment in the data
path to snoop certain packet fields, to carry 5G QoS information
associated with the data, and to be efficiently encoded. This memo
specifies an encapsulation that meets these requirements.
Status of this Memo
This Internet-Draft is submitted to IETF in full conformance
with the provisions of BCP 78 and BCP 79.
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This Internet-Draft will expire on August 2020.
Copyright and License Notice
Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved.
Allan et al., Expires September 2020 [Page 1]
Internet-Draft draft-allan-5g-fmc-encapsulation March 2020
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Table of Contents
1. Introduction...................................................2
1.1. Requirements Language........................................3
1.2. Acronyms.....................................................3
2. Data Encapsulation Format......................................4
3. Acknowledgements...............................................5
4. Security Considerations........................................5
5. IANA Considerations............................................5
6. References.....................................................6
6.1. Normative References.........................................6
6.2. Informative References.......................................6
7. Authors' Addresses.............................................7
1. Introduction
Converged 5G ("fifth generation") wireline networks carry user data
between 5G residential gateways (5G-RG) and the 5G Access Gateway
Function (identified as an Fixed-AGF (FAGF) by 3GPP in [5]) across
deployed access networks based on BBF TR-101[6] and TR-178[7].
The transport encapsulation used needs to meet a variety of
requirements including the following:
- The ability to multiplex multiple logical connections (Protocol
Data Unit (PDU) Sessions as defined by 3GPP) within a VLAN
identified p2p logical circuit between a 5G-RG and an FAGF.
- To allow unmodified legacy equipment in the data path to identify
the encapsulation and snoop specific fields in the payload. Some
access nodes in the data path between the 5G-RG and the FAGF
(Such as DSLAMs and OLTs) currently snoop into packets identified
by specific Ethertypes to identify protocols such as PPPoE, IP,
ARP, and IGMP. This may be for the purpose of enhanced QoS,
policing of identifiers and other applications. Some deployments
are depended upon this snooping. Such devices are currently able
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