Considerations in the development of a QoS Architecture for CCNx-like ICN protocols
draft-oran-icnrg-qosarch-05

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ICNRG                                                            D. Oran
Internet-Draft                       Network Systems Research and Design
Intended status: Informational                            24 August 2020
Expires: 25 February 2021

 Considerations in the development of a QoS Architecture for CCNx-like
                             ICN protocols
                      draft-oran-icnrg-qosarch-05

Abstract

   This is a position paper.  It documents the author's personal views
   on how Quality of Service (QoS) capabilities ought to be accommodated
   in ICN protocols like CCNx or NDN which employ flow-balanced
   Interest/Data exchanges and hop-by-hop forwarding state as their
   fundamental machinery.  It argues that such protocols demand a
   substantially different approach to QoS from that taken in TCP/IP,
   and proposes specific design patterns to achieve both classification
   and differentiated QoS treatment on both a flow and aggregate basis.
   It also considers the effect of caches in addition to memory, CPU and
   link bandwidth as a resource that should be subject to explicitly
   unfair resource allocation.  The proposed methods are intended to
   operate purely at the network layer, providing the primitives needed
   to achieve both transport and higher layer QoS objectives.  It
   explicitly excludes any discussion of Quality of Experience (QoE)
   which can only be assessed and controlled at the application layer or
   above.

   This document is not a product of the IRTF Information-Centric
   Networking Research Group (ICNRG) but has been through formal last
   call and has the support of the participants in the research group
   for publication as an individual submission.

Status of This Memo

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   provisions of BCP 78 and BCP 79.

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Oran                    Expires 25 February 2021                [Page 1]
Internet-Draft      Thoughts on ICN QoS Architecture         August 2020

   This Internet-Draft will expire on 25 February 2021.

Copyright Notice

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   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/
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   Please review these documents carefully, as they describe your rights
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Applicability Assessment by ICNRG Chairs  . . . . . . . .   4
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   4
   3.  Background on Quality of Service in network protocols . . . .   4
     3.1.  Basics on how ICN protocols like NDN and CCNx work  . . .   6
     3.2.  Congestion Control basics relevant to ICN . . . . . . . .   7
   4.  What can we control to achieve QoS in ICN?  . . . . . . . . .   9
   5.  How does this relate to QoS in TCP/IP?  . . . . . . . . . . .  10
   6.  Why is ICN Different?  Can we do Better?  . . . . . . . . . .  12
     6.1.  Equivalence class capabilities  . . . . . . . . . . . . .  12
     6.2.  Topology interactions with QoS  . . . . . . . . . . . . .  12
     6.3.  Specification of QoS treatments . . . . . . . . . . . . .  13
     6.4.  ICN forwarding semantics effect on QoS  . . . . . . . . .  14
     6.5.  QoS interactions with Caching . . . . . . . . . . . . . .  15
   7.  Strawman principles for an ICN QoS architecture . . . . . . .  15
     7.1.  Can Intserv-like traffic control in ICN provide richer QoS
           semantics?  . . . . . . . . . . . . . . . . . . . . . . .  19
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  22
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  22
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  22
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  22
     10.2.  Informative References . . . . . . . . . . . . . . . . .  22
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  28

1.  Introduction

   The TCP/IP protocol suite used on today's Internet has over 30 years
   of accumulated research and engineering into the provision of Quality
   of Service machinery, employed with varying success in different