User Plane Protocol and Architectural Analysis on 3GPP 5G System
draft-ietf-dmm-5g-uplane-analysis-00
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DMM Working Group S. Homma
Internet-Draft NTT
Intended status: Informational T. Miyasaka
Expires: July 10, 2019 KDDI Research
S. Matsushima
SoftBank
D. Voyer
Bell Canada
January 6, 2019
User Plane Protocol and Architectural Analysis on 3GPP 5G System
draft-ietf-dmm-5g-uplane-analysis-00
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.
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This Internet-Draft will expire on July 10, 2019.
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 July 10, 2019 [Page 1]
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Current Status of Mobile User Plane for 5G . . . . . . . 3
1.2. Our Way of Analysis Work . . . . . . . . . . . . . . . . 3
2. Terms and Abbreviations . . . . . . . . . . . . . . . . . . . 4
3. GTP-U Specification and Observation . . . . . . . . . . . . . 5
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
4.2. Architectural Requirements for User Plane Protocols . 19
5. Evaluation Aspects . . . . . . . . . . . . . . . . . . . . . 22
5.1. Supporting PDU Session Type Variations . . . . . . . . . 23
5.2. Nature of Data Path . . . . . . . . . . . . . . . . . . . 23
5.3. Supporting Transport Variations . . . . . . . . . . . . . 24
5.4. Data Path Management . . . . . . . . . . . . . . . . . . 24
5.5. QoS Control . . . . . . . . . . . . . . . . . . . . . . . 25
5.6. Traffic Detection and Flow Handling . . . . . . . . . . . 26
5.7. Supporting Network Slicing Diversity . . . . . . . . . . 26
6. Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . 27
7. Security Consideration . . . . . . . . . . . . . . . . . . . 27
8. Acknowledgement . . . . . . . . . . . . . . . . . . . . . . . 28
9. Informative References . . . . . . . . . . . . . . . . . . . 28
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 32
1. Introduction
This document analyzes the mobile user plane protocol and the
architecture specified by 3GPP 5G documents. The background of the
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