ALTO Cost Calendar
Network Working Group S. Randriamasy
Internet-Draft Nokia Bell Labs
Intended status: Standards Track R. Yang
Expires: August 31, 2019 Yale University
February 27, 2019
ALTO Cost Calendar
This document is an extension to the base Application-Layer Traffic
Optimization (ALTO) protocol. It extends the ALTO cost information
service such 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 Calendars, 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
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in
BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here.
When the words appear in lower case, they are to be interpreted with
their natural language meanings.
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
Randriamasy, et al. Expires August 31, 2019 [Page 1]
Internet-Draft ALTO Cost Calendar February 2019
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This Internet-Draft will expire on August 31, 2019.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Overview of ALTO Cost Calendars . . . . . . . . . . . . . . . 4
2.1. ALTO Cost Calendar information features . . . . . . . . . 5
2.2. ALTO Calendar design characteristics . . . . . . . . . . 6
2.2.1. ALTO Cost Calendar for all cost modes . . . . . . . . 7
2.2.2. Compatibility with legacy ALTO Clients . . . . . . . 7
3. ALTO Calendar specification: IRD extensions . . . . . . . . . 8
3.1. Calendar attributes in the IRD resources capabilities . . 8
3.2. Calendars in a delegate IRD . . . . . . . . . . . . . . . 9
3.3. Example IRD with ALTO Cost Calendars . . . . . . . . . . 10
4. ALTO Calendar specification: Service Information Resources . 13
4.1. Calendar extensions for Filtered Cost Maps (FCM) . . . . 14
4.1.1. Calendar extensions in Filtered Cost Map requests . . 14
4.1.2. Calendar extensions in Filtered Cost Map responses . 15
4.1.3. Use case and example: FCM with a bandwidth Calendar . 17
4.2. Calendar extensions in the Endpoint Cost Service . . . . 20
4.2.1. Calendar specific input in Endpoint Cost requests . 20
4.2.2. Calendar attributes in the Endpoint Cost response . . 20
4.2.3. Use case and example: ECS with a routingcost Calendar 21
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