ALTO Extension: Path Vector
draft-ietf-alto-path-vector-10

Document Type Active Internet-Draft (alto WG)
Last updated 2020-03-09
Replaces draft-yang-alto-path-vector
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ALTO                                                              K. Gao
Internet-Draft                                        Sichuan University
Intended status: Standards Track                                  Y. Lee
Expires: 10 September 2020                                              
                                                          S. Randriamasy
                                                         Nokia Bell Labs
                                                               Y.R. Yang
                                                         Yale University
                                                                J. Zhang
                                                       Tongji University
                                                            9 March 2020

                      ALTO Extension: Path Vector
                   draft-ietf-alto-path-vector-10

Abstract

   This document is an extension to the base Application-Layer Traffic
   Optimization protocol [RFC7285].  The current ALTO Cost Services
   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 parts or
   elements traversed by a path between its source and destination.
   Examples of such abstracted parts are networks, data centers or
   links.  This is useful for applications whose performance is impacted
   by particular network parts 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 10 September 2020               [Page 1]
Internet-Draft                   ALTO-PV                      March 2020

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   This Internet-Draft will expire on 10 September 2020.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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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.  Use Cases . . . . . . . . . . . . . . . . . . . . . . . . . .   5
     2.1.  Capacity Region for Multi-Flow Scheduling . . . . . . . .   6
     2.2.  Recent Use Cases  . . . . . . . . . . . . . . . . . . . .   7
       2.2.1.  Large-scale Data Analytics  . . . . . . . . . . . . .   8
       2.2.2.  Context-aware Data Transfer . . . . . . . . . . . . .   8
       2.2.3.  CDN and Service Edge  . . . . . . . . . . . . . . . .   8
     2.3.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   8
   3.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   9
     3.1.  Abstract Network Element  . . . . . . . . . . . . . . . .  10
       3.1.1.  ANE Name  . . . . . . . . . . . . . . . . . . . . . .  10
       3.1.2.  ANE Properties  . . . . . . . . . . . . . . . . . . .  11
     3.2.  Path Vector . . . . . . . . . . . . . . . . . . . . . . .  12
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