Maintaining CCNx or NDN flow balance with highly variable data object sizes
draft-oran-icnrg-flowbalance-04

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

 Maintaining CCNx or NDN flow balance with highly variable data object
                                 sizes
                    draft-oran-icnrg-flowbalance-04

Abstract

   Deeply embedded in some ICN architectures, especially Named Data
   Networking (NDN) and Content-Centric Networking (CCNx) is the notion
   of flow balance.  This captures the idea that there is a one-to-one
   correspondence between requests for data, carried in Interest
   messages, and the responses with the requested data object, carried
   in Data messages.  This has a number of highly beneficial properties
   for flow and congestion control in networks, as well as some
   desirable security properties.  For example, neither legitimate users
   nor attackers are able to inject large amounts of un-requested data
   into the network.

   Existing congestion control approaches however have a difficult time
   dealing effectively with a widely varying MTU of ICN data messages,
   because the protocols allow a dynamic range of 1-64K bytes.  Since
   Interest messages are used to allocate the reverse link bandwidth for
   returning Data, there is large uncertainty in how to allocate that
   bandwidth.  Unfortunately, most current congestion control schemes in
   CCNx and NDN only count Interest messages and have no idea how much
   data is involved that could congest the inverse link.  This document
   proposes a method to maintain flow balance by accommodating the wide
   dynamic range in Data message size.

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
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   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

Oran                    Expires 25 February 2021                [Page 1]
Internet-Draft          Maintaining Flow Balance             August 2020

   This Internet-Draft will expire on 25 February 2021.

Copyright Notice

   Copyright (c) 2020 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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   4
   3.  Method to enhance congestion control with signaled size
           information in Interest Messages  . . . . . . . . . . . .   5
     3.1.  How to predict the size of returning Data messages  . . .   6
     3.2.  Handling 'too big' cases  . . . . . . . . . . . . . . . .   7
     3.3.  Handling 'too small' cases  . . . . . . . . . . . . . . .   8
     3.4.  Interactions with Interest Aggregation  . . . . . . . . .   9
     3.5.  Operation when some Interests lack the expected data size
           option and some have it . . . . . . . . . . . . . . . . .  10
   4.  Dealing with malicious actors . . . . . . . . . . . . . . . .  12
   5.  Mapping to CCNx and NDN packet encodings  . . . . . . . . . .  13
     5.1.  Packet encoding for CCNx  . . . . . . . . . . . . . . . .  13
     5.2.  Packet encoding for NDN . . . . . . . . . . . . . . . . .  13
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  13
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  14
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  14
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  14
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  14
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  14
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  16

Oran                    Expires 25 February 2021                [Page 2]
Internet-Draft          Maintaining Flow Balance             August 2020

1.  Introduction

   Deeply embedded in some ICN architectures, especially Named Data
   Networking ([NDN]) and Content-Centric Networking (CCNx
   [RFC8569],[RFC8609]) is the notion of _flow balance_. This captures