Application-Layer Traffic Optimization (ALTO) Cost Calendar
draft-ietf-alto-cost-calendar-21
Network Working Group S. Randriamasy
Internet-Draft Nokia Bell Labs
Intended status: Standards Track R. Yang
Expires: September 18, 2020 Yale University
Q. Wu
Huawei
L. Deng
China Mobile
N. Schwan
Thales Deutschland
March 17, 2020
Application-Layer Traffic Optimization (ALTO) Cost Calendar
draft-ietf-alto-cost-calendar-21
Abstract
This document is an extension to the base Application-Layer Traffic
Optimization (ALTO) protocol. It extends the ALTO cost information
service so that applications decide not only 'where' to connect, but
also 'when'. This is useful for applications that need to perform
bulk data transfer and would like to schedule these transfers during
an off-peak hour, for example. This extension introduces ALTO Cost
Calendar, with which an ALTO Server exposes ALTO cost values in JSON
arrays where each value corresponds to a given time interval. The
time intervals as well as other Calendar attributes, are specified in
the Information Resources Directory and ALTO Server responses.
Status of This Memo
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provisions of BCP 78 and BCP 79.
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material or to cite them other than as "work in progress."
This Internet-Draft will expire on September 18, 2020.
Randriamasy, et al. Expires September 18, 2020 [Page 1]
Internet-Draft ALTO Cost Calendar March 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Some recent known uses . . . . . . . . . . . . . . . . . 4
1.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . 5
2. Requirements Language . . . . . . . . . . . . . . . . . . . . 5
3. Overview of ALTO Cost Calendars and terminology . . . . . . . 5
3.1. ALTO Cost Calendar overview . . . . . . . . . . . . . . . 6
3.2. ALTO Cost Calendar information features . . . . . . . . . 6
3.3. ALTO Calendar design characteristics . . . . . . . . . . 7
3.3.1. ALTO Cost Calendar for all cost modes . . . . . . . . 9
3.3.2. Compatibility with legacy ALTO Clients . . . . . . . 10
4. ALTO Calendar specification: IRD extensions . . . . . . . . . 10
4.1. Calendar attributes in the IRD resource capabilities . . 11
4.2. Calendars in a delegate IRD . . . . . . . . . . . . . . . 12
4.3. Example IRD with ALTO Cost Calendars . . . . . . . . . . 13
5. ALTO Calendar specification: Service Information Resources . 17
5.1. Calendar extensions for Filtered Cost Maps (FCM) . . . . 17
5.1.1. Calendar extensions in Filtered Cost Map requests . . 17
5.1.2. Calendar extensions in Filtered Cost Map responses . 18
5.1.3. Use case and example: FCM with a bandwidth Calendar . 21
5.2. Calendar extensions in the Endpoint Cost Service . . . . 23
5.2.1. Calendar specific input in Endpoint Cost requests . . 23
5.2.2. Calendar attributes in the Endpoint Cost response . . 24
5.2.3. Use case and example: ECS with a routingcost Calendar 25
5.2.4. Use case and example: ECS with a multi-cost Calendar
for routingcost and owdelay . . . . . . . . . . . . . 27
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