Asymmetric IPv6 for IoT Networks
draft-jiang-asymmetric-ipv6-02
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Network Working Group S. Jiang
Internet-Draft Huawei Technologies Co., Ltd
Intended status: Informational G. Li
Expires: May 1, 2020 Huawei Technologies
B. Carpenter
Univ. of Auckland
October 29, 2019
Asymmetric IPv6 for IoT Networks
draft-jiang-asymmetric-ipv6-02
Abstract
This document describes a new approach to IPv6 header compression for
use in scenarios where minimizing packet size is crucial but routing
performance must be maximised.
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
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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 May 1, 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
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
Jiang, et al. Expires May 1, 2020 [Page 1]
Internet-Draft Asymmetric IPv6 October 2019
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Proposed Solution . . . . . . . . . . . . . . . . . . . . . . 3
3. Address Transformation at the Gateway . . . . . . . . . . . . 5
4. Routing without Decompression . . . . . . . . . . . . . . . . 6
5. Address Configuration . . . . . . . . . . . . . . . . . . . . 6
6. Compatibility with Existing Protocols . . . . . . . . . . . . 7
7. Relationship to Static Context Header Compression . . . . . . 7
8. Security Considerations . . . . . . . . . . . . . . . . . . . 7
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 8
10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 8
11. References . . . . . . . . . . . . . . . . . . . . . . . . . 8
Appendix A. Change log [RFC Editor: Please remove] . . . . . . . 9
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 10
1. Introduction
The large address space of IPv6 is essential for the massive
expansion of the network edge that will be caused by "Internet of
Things" (IoT) technology over low-power or 5G links. However, the
size of a raw IPv6 packet header causes difficulty due to the small
maximum transmission units (MTU) allowed by typical low-power, low-
cost link layers. For 5G, this aspect is discussed in
[I-D.ietf-dmm-5g-uplane-analysis]. Thus header compression,
including address compression, is an important issue. This decreases
the size of raw packets, but compressed IP addresses are not
routeable except by decompressing them completely in every forwarding
node. There are two issues here. The first is the extra computation
resource needed for compressing or decompressing in constrained IoT
nodes. The second is that full-length IPv6 routing will consume more
memory to store routing tables and packet queues. Such resource
consumption is very undesirable in constrained nodes with limited
storage, CPU power, and battery capacity.
To mitigate these issues, here we propose a solution enabling the
shortening of IPv6 addresses inside packets, and the routing of
packets according to short addresses, without needing the overhead of
a decompression step prior to route lookup. Considering that the
scale and size of edge networks may vary widely, different lengths of
short address can be used in different domains.
As an illustrative example, consider an edge network which is known
to never require more than a few hundred nodes, which in most cases
will communicate either with each other, or with application layer
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