Subject: [alto] FW: New Version Notification for draft-randriamasy-alto-cost-context-01.txt

From: "Randriamasy, Sabine (Nokia - FR)" <[email-masked]>
Date: Mon, 13 Mar 2017 22:50:04 +0000

Hi all,

An update of draft "ALTO Contextual Cost Values" has just been submitted, on which your feedback is more than welcome, see https://tools.ietf.org/html/draft-randriamasy-alto-cost-context-01.  

In a nutshell: this draft proposes to extend the cost information specified in [RFC7285] by providing, for a same cost metric, several possible cost values where each one depends on qualitative criteria as opposed to quantitative criteria such as time. To this end, ALTO queries and responses associate so-called "context parameters" to cost metrics. This allows for instance to get:
- "routingcost" values, under SLA-3 in the case of cellular and wifi access type,
- or to get an ALTO calendar of cellular connection costs in the uplink and downlink directions and depending on whether unattended data is allowed or not.

This draft focuses on use cases in cellular and wireless networks. It assumes the availability of cellular cost metrics and associated namespace. The extension is applicable to other network technologies.

The purpose is to allow finer grained decisions and avoid defining a metric to represent each context. 

The updates wrt version 00 are as follows:
- the design option for cellular networks is to map a cell to a PID. Connection costs within to a cell C1 mapped to say PID1 are conveyed as a PID1 to PID1 in the uplink and downlink directions with context params "uplink " and "downlink". 
- Section 4 proposes a design that logically combines several sets of context parameters, moderating thus the set of conveyed parameters combinations and metrics. The examples have been revised in that direction.

Thanks,
Sabine

>>-----Original Message-----
>>From: [email-masked] [mailto:[email-masked]]
>>Sent: lundi 13 mars 2017 19:52
>>To: Randriamasy, Sabine (Nokia - FR) <sabine.randriamasy@nokia-bell-
>>labs.com>
>>Subject: New Version Notification for draft-randriamasy-alto-cost-context-
>>01.txt
>>
>>
>>A new version of I-D, draft-randriamasy-alto-cost-context-01.txt
>>has been successfully submitted by Sabine Randriamasy and posted to the
>>IETF repository.
>>
>>Name:		draft-randriamasy-alto-cost-context
>>Revision:	01
>>Title:		ALTO Contextual Cost Values
>>Document date:	2017-03-13
>>Group:		Individual Submission
>>Pages:		18
>>URL:            https://www.ietf.org/internet-drafts/draft-randriamasy-alto-cost-
>>context-01.txt
>>Status:         https://datatracker.ietf.org/doc/draft-randriamasy-alto-cost-
>>context/
>>Htmlized:       https://tools.ietf.org/html/draft-randriamasy-alto-cost-
>>context-01
>>Diff:           https://www.ietf.org/rfcdiff?url2=draft-randriamasy-alto-cost-
>>context-01
>>
>>Abstract:
>>   The Application-Layer Traffic Optimization (ALTO) Service has defined
>>   network and cost maps to provide basic network information, where the
>>   cost maps allow only one JSON value for a requested metric.
>>
>>   This document introduces several protocol extensions to allow ALTO
>>   clients to support use cases such as context based connection
>>   selection in cellular networks and calendaring for unattended data.
>>   This document refers to other extension proposals posted in the ALTO
>>   WG that can support the present use cases as well.  Likewise, some of
>>   the proposed extensions may serve other ALTO use cases.
>>
>>
>>
>>
>>
>>Please note that it may take a couple of minutes from the time of submission
>>until the htmlized version and diff are available at tools.ietf.org.
>>
>>The IETF Secretariat