IPv6 Solution for 5G Edge Computing Sticky Service
draft-dunbar-6man-5g-edge-compute-sticky-service-00

Document Type Active Internet-Draft (individual)
Authors Linda Dunbar  , John Kaippallimalil 
Last updated 2020-10-27
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Network Working Group                                    L. Dunbar
Internet Draft                                   J. Kaippallimalil
Intended status: Standard                                Futurewei
Expires: April 27, 2021

                                                  October 27, 2020

         IPv6 Solution for 5G Edge Computing Sticky Service
         draft-dunbar-6man-5g-edge-compute-sticky-service-00

Abstract

   This draft describes an IPv6 solution that enables packets from
   an application on a UE (User Equipment) sticking to the same
   application server location when the UE moves from one 5G cell
   site to another.

Status of this Memo

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Internet-Draft     IPv6 for 5G Edge Sticky Service

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   This Internet-Draft will expire on April 7, 2021.

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Table of Contents

1. Introduction.................................................. 3
1.1. 5G Edge Computing Background................................ 3
1.2. Problem #1: ANYCAST in 5G EC Environment.................... 4
1.3. Problem #2: sticking to original App Server................. 5
1.4. Problem #3: Application Server Relocation................... 5
2. Conventions used in this document............................. 6
3. Proposed IPv6 Based Solution.................................. 7
3.1. Solution Overview........................................... 8
3.2. Ensure one IPv6 Flow Go to the Same Location................ 9
3.3. Discover the Egress Routers for App Servers................ 10
3.4. Using Destination Extension Header......................... 10
3.5. Using IPv6 Routing Extension Header........................ 13
4. Achieve Sticky Service without dependence on UE.............. 14
5. Forwarding to the desired A-ER without using Tunnel.......... 15
6. Manageability Considerations................................. 16
7. Security Considerations...................................... 17
8. IANA Considerations.......................................... 17
9. References................................................... 17
9.1. Normative References....................................... 17
9.2. Informative References..................................... 17
10. Acknowledgments............................................. 18

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1. Introduction

1.1. 5G Edge Computing Background

   As described in [5G-EC-Metrics], one Application can have
   multiple Application Servers hosted in different Edge Computing
   data centers that are close in proximity. Those Edge Computing
   (mini) data centers are usually very close to, or co-located
   with, 5G base stations, with the goal to minimize latency and
   optimize the user experience.

   When a UE (User Equipment) initiates application packets using
   the destination address from a DNS reply or from its own cache,
   the packets from the UE are carried in a PDU session through 5G
   Core [5GC] to the 5G UPF-PSA (User Plan Function - PDU Session
   Anchor). The UPF-PSA decapsulate the 5G GTP outer header and
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