ALTO Extension: Path Vector
draft-ietf-alto-path-vector-11

Document Type Active Internet-Draft (alto WG)
Last updated 2020-07-14
Replaces draft-yang-alto-path-vector
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ALTO                                                              K. Gao
Internet-Draft                                        Sichuan University
Intended status: Standards Track                                  Y. Lee
Expires: 15 January 2021                                                
                                                          S. Randriamasy
                                                         Nokia Bell Labs
                                                               Y.R. Yang
                                                         Yale University
                                                                J. Zhang
                                                       Tongji University
                                                            14 July 2020

                      ALTO Extension: Path Vector
                   draft-ietf-alto-path-vector-11

Abstract

   This document is an extension to the base Application-Layer Traffic
   Optimization protocol [RFC7285].  The current ALTO Cost Services only
   allow applications to obtain cost values on an end-to-end path
   defined by its source and destination.  The present extension
   provides abstracted information on particular network components or
   elements traversed by a path between its source and destination.
   Examples of such abstracted components are networks, data centers or
   links.  This is useful for applications whose performance is impacted
   by particular network components they traverse or by their
   properties.  Applications having the choice among several connection
   paths may use this information to select paths accordingly and
   improve their performance.  In particular, they may infer that
   several paths share common links and prevent traffic bottlenecks by
   avoiding such paths.  This document introduces a new cost type called
   Path Vector.  A Path Vector is an array of entities that each
   identifies an abstracted representation of a network part and that
   are called Abstract Network Element (ANE).  Each ANE is defined by a
   set of properties.  ANE properties are conveyed by an ALTO
   information resource called "Property Map", that can be packed
   together with the Path Vectors in a multipart response.  They can
   also be obtained via a separate ALTO request to a Property Map. An
   ALTO Property Map is an extension to the ALTO protocol, that is
   specified in another document entitled "Unified Properties for the
   ALTO Protocol" [I-D.ietf-alto-unified-props-new].

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

Gao, et al.              Expires 15 January 2021                [Page 1]
Internet-Draft                   ALTO-PV                       July 2020

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

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  Requirements Languages  . . . . . . . . . . . . . . . . . . .   6
   3.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   6
   4.  Problem Statement . . . . . . . . . . . . . . . . . . . . . .   7
     4.1.  Design Requirements . . . . . . . . . . . . . . . . . . .   7
     4.2.  Recent Use Cases  . . . . . . . . . . . . . . . . . . . .   9
       4.2.1.  Large-scale Data Analytics  . . . . . . . . . . . . .   9
       4.2.2.  Context-aware Data Transfer . . . . . . . . . . . . .  10
       4.2.3.  CDN and Service Edge  . . . . . . . . . . . . . . . .  10
   5.  Path Vector Extension: Overview . . . . . . . . . . . . . . .  10
     5.1.  Abstract Network Element  . . . . . . . . . . . . . . . .  11
       5.1.1.  ANE Domain  . . . . . . . . . . . . . . . . . . . . .  11
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