Generic Multi-Access (GMA) Convergence Encapsulation Protocols
draft-zhu-intarea-gma-00

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INTAREA                                                          J. Zhu
Internet Draft                                                    Intel
Intended status: Standards Track
Expires: July 4,2019
                                                         January 4, 2019

      Generic Multi-Access (GMA) Convergence Encapsulation Protocols
                         draft-zhu-intarea-gma-00

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Zhu                      Expires July 4, 2019                  [Page 1]
Internet-Draft       GMA Encapsulation Protocols           January 2019

Abstract

   Today, a device can be simultaneously connected to multiple
   communication networks based on different technology implementations
   and network architectures like WiFi, LTE, 5G, and DSL. In such
   scenario, it is desirable to combine multiple access networks to
   improve quality of experience. For example, an IP flow may be
   delivered over both LTE and Wi-Fi network for higher end-to-end
   throughput. In another example, lost packets may be retransmitted
   when the device switches from Wi-Fi to LTE. However, such multi-
   access optimization requires inserting additional control
   information, e.g. Sequence Number, into each IP packet.

   Unfortunately, there is no existing IP protocol for such purpose. As
   a result, IP-over-IP tunneling has been used in today's solutions,
   e.g. [LWIPEP] [GRE], to insert the GRE header, and then encode
   additional control information in the GRE header fields, e.g. Key,
   Sequence Number. However, there are two main drawbacks with this
   approach: 1) IP-over-IP tunneling leads to higher overhead
   especially for small packet. For example, the overhead of IP-over-
   IP/GRE tunneling with both Key and Sequence Number is 32 Bytes,
   which is 80% of a 40 Bytes TCP ACK packet; 2) It is difficult to
   introduce new control fields using the existing GRE header format.

   This document presents a new light-weight and flexible encapsulation
   protocol to support multi-access solutions [ATSSS] [MAMS] [LWIPEP]
   without IP-over-IP tunneling.

Table of Contents

   1. Introduction...................................................2
   2. Conventions used in this document..............................3
   3. GMA Trailer Format.............................................4
   4. Fragmentation..................................................6
   5. Concatenation..................................................7
   6. Security Considerations........................................8
   7. IANA Considerations............................................8
   8. References.....................................................8
      8.1. Normative References......................................8
      8.2. Informative References....................................8

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].

Zhu                     Expires July  4, 2019                  [Page 2]
Internet-Draft       GMA Encapsulation Protocols           January 2019

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