Generic Multi-Access (GMA) Convergence Encapsulation Protocols
draft-zhu-intarea-gma-04

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Last updated 2019-09-30
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INTAREA/Network Working Group                                    J. Zhu
Internet Draft                                                    Intel
Intended status: Informational                              S. Kanugovi
Expires: March 30,2020                                      Nokia
                                                    September 30, 2019

      Generic Multi-Access (GMA) Convergence Encapsulation Protocols
                         draft-zhu-intarea-gma-04

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Zhu                     Expires March 30, 2020                 [Page 1]
Internet-Draft       GMA Encapsulation Protocols         September 2019

Abstract

   Today, a device can be simultaneously connected to multiple
   networks, e.g. Wi-Fi, LTE, 5G, and DSL. It is desirable to combine
   them seamlessly to improve quality of experience. Such
   optimization requires additional control information, e.g.
   Sequence Number, in each (IP) data packet. This document presents
   a new light-weight and flexible encapsulation protocol for this
   need. The solution has been developed by the authors based on
   their experiences in multiple standards bodies including the IETF
   and 3GPP, but is not an Internet Standard and does not represent
   the consensus opinion of the IETF. This document will enable other
   developers to build interoperable implementations.

Table of Contents

   1. Introduction ................................................. 2
   2. Conventions used in this document ............................ 3
   3. Use Case ..................................................... 4
   4. GMA Trailer Format ........................................... 5
   5. Fragmentation ................................................ 7
   6. Concatenation ................................................ 8
   7. GMA Header Format ............................................ 9
   8. Security Considerations ..................................... 11
   9. IANA Considerations ......................................... 11
   10. References ................................................. 12
      10.1. Normative References .................................12
      10.2. Informative References ...............................12

1. Introduction

   Figure 1 shows the user-plane Generic Multi-Access (GMA) protocol
   stack, which has been used in today's multi-access solutions
   [ATSSS] [MAMS] [LWIPEP] [GRE].

          +-----------------------------------------------------+
          |                      IP PDU                         |
          |-----------------------------------------------------|
          |             Convergence Sublayer                    |
          |-----------------------------------------------------|
          | Adaptation     | Adaptation    | Adaptation         |
          | Sublayer       | Sublayer      | Sublayer           |
          | (optional)     | (optional)    | (optional)         |
          |-----------------------------------------------------|
          | Access #1 IP   | Access #2 IP  | Access #3 IP       |
          +-----------------------------------------------------+

Zhu                    Expires March  30, 2020                 [Page 2]
Internet-Draft       GMA Encapsulation Protocols         September 2019

                 Figure 1: GMA User-Plane Protocol Stack

   It consists of the following two Sublayers:

     o Convergence sublayer: This layer performs multi-access
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