User Plane Protocol and Architectural Analysis on 3GPP 5G System
draft-ietf-dmm-5g-uplane-analysis-02

Document Type Active Internet-Draft (dmm WG)
Last updated 2019-07-08
Replaces draft-hmm-dmm-5g-uplane-analysis
Stream IETF
Intended RFC status (None)
Formats plain text pdf html bibtex
Stream WG state WG Document
Document shepherd No shepherd assigned
IESG IESG state I-D Exists
Consensus Boilerplate Unknown
Telechat date
Responsible AD (None)
Send notices to (None)
DMM Working Group                                               S. Homma
Internet-Draft                                                       NTT
Intended status: Informational                               T. Miyasaka
Expires: January 9, 2020                                   KDDI Research
                                                           S. Matsushima
                                                                SoftBank
                                                                D. Voyer
                                                             Bell Canada
                                                            July 8, 2019

    User Plane Protocol and Architectural Analysis on 3GPP 5G System
                  draft-ietf-dmm-5g-uplane-analysis-02

Abstract

   This document analyzes the mobile user plane protocol and the
   architecture specified in 3GPP 5G documents.  The analysis work is to
   clarify those specifications, extract protocol and architectural
   requirements and derive evaluation aspects for user plane protocols
   on IETF side.  This work is corresponding to the User Plane Protocol
   Study work on 3GPP side.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on January 9, 2020.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of

Homma, et al.            Expires January 9, 2020                [Page 1]
Internet-Draft    draft-ietf-dmm-5g-uplane-analysis-02         July 2019

   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Current Status of Mobile User Plane for 5G  . . . . . . .   3
     1.2.  Our Way of Analysis Work  . . . . . . . . . . . . . . . .   4
   2.  Terms and Abbreviations . . . . . . . . . . . . . . . . . . .   4
   3.  GTP-U Specification and Observation . . . . . . . . . . . . .   6
     3.1.  GTP-U Tunnel  . . . . . . . . . . . . . . . . . . . . . .   6
     3.2.  GTP-U Header Format . . . . . . . . . . . . . . . . . . .  10
     3.3.  Control Plane Protocol for GTP-U  . . . . . . . . . . . .  12
     3.4.  GTP-U message . . . . . . . . . . . . . . . . . . . . . .  13
     3.5.  Packet Format . . . . . . . . . . . . . . . . . . . . . .  14
     3.6.  Observations Summary  . . . . . . . . . . . . . . . . . .  16
   4.  5GS Architectural Requirements for User Plane Protocols . . .  16
     4.1.  Overview of 5G System Architecture  . . . . . . . . . . .  16
       4.1.1.  UPF Functionalities . . . . . . . . . . . . . . . . .  18
       4.1.2.  UP Traffic Detection  . . . . . . . . . . . . . . . .  19
       4.1.3.  User Plane Configuration  . . . . . . . . . . . . . .  21
     4.2.  Architectural Requirements for User Plane     Protocols .  22
   5.  Evaluation Aspects  . . . . . . . . . . . . . . . . . . . . .  28
     5.1.  Supporting PDU Session Type Variations  . . . . . . . . .  29
     5.2.  Nature of Data Path . . . . . . . . . . . . . . . . . . .  29
     5.3.  Supporting Transport Variations . . . . . . . . . . . . .  30
     5.4.  Data Path Management  . . . . . . . . . . . . . . . . . .  30
     5.5.  QoS Control . . . . . . . . . . . . . . . . . . . . . . .  31
     5.6.  Traffic Detection and Flow Handling . . . . . . . . . . .  32
     5.7.  Supporting Network Slicing Diversity  . . . . . . . . . .  32
     5.8.  Reliable Communication support  . . . . . . . . . . . . .  33
   6.  Conclusion  . . . . . . . . . . . . . . . . . . . . . . . . .  33
   7.  Security Consideration  . . . . . . . . . . . . . . . . . . .  34
   8.  Acknowledgement . . . . . . . . . . . . . . . . . . . . . . .  34
   9.  Informative References  . . . . . . . . . . . . . . . . . . .  34
Show full document text