Re: [alto] Cellular information exposure discussion (Fwd: New Version Notification for draft-huang-alto-mowie-for-network-aware-app-04.txt

[Zili Meng <[e-mail]>]

Hi Richard and all,

Thanks for bringing this up!

Sure we'll be very happy if we could contribute to the IETF and the alto
group on how to feedback the network conditions (e.g., cellular
information) to the application (the sender). And I also feel that a survey
and a case study would be very helpful to sort out what we need in the
scope of alto.

Unfortunately I may not be able to attend the alto meeting in IETF 114. Do
you feel it would be better if we first prepare some writeups or drafts for
the C2 (send the network conditions back to the sender)? We could then
bring writeups back on the design space and / or the use cases so that we
can have something to discuss with.

A preprint of the W2 paper is available at
https://zilimeng.com/papers/zhuge-sigcomm22.pdf for your information. We'll
also be highly appreciated if there are any comments or feedback.

On Tue, Jul 19, 2022 at 1:46 PM Y. Richard Yang <[e-mail]>
wrote:

> Hi ALTO WG,
>
> During the weekly meeting today, the design team discussed about the
> document, and suggested that the authors update the WG on a new version of
> the MOWIE draft, which was uploaded last week and focuses on cellular
> network information exposure to network-aware applications. The links to
> the new version and the diff showing the updates can be found below. Any
> comments, feedback, or interests in working together are welcome and
> greatly appreciated.
>
> Using this email, we also want to include that there are two quite
> relevant pieces of work:
> W1. PBE-CC: Congestion Control via Endpoint-Centric, Physical-Layer
> Bandwidth Measurements (https://arxiv.org/abs/2002.03475), by Yaxiong
> Xie, Prof. Jamieson, and Prof. Rexford;
> W2. Achieving Consistent Low Latency for Wireless Real-Time Communications
> with the Shortest Control Loop (paper to be made public soon), by Zili, and
> Prof. Mingwei and team.
>
> It helps to use this email to point out a bigger picture of the problem
> space and related work. One perspective is that the problem space consists
> of 3 components:
> C1. What cellular-network information should be collected to be sent to
> the applications?
> C2. How is the cellular information sent to the applications?
> C3. How do the applications use the information?
>
> It is important to note that the full exploration of the problem space is
> not included in the current charter. However, this is an important problem
> space and hence it helps  to keep track of the progress and potential
> impacts on ALTO.
>
> For C1, the impact will be the list of performance metrics. For C3, the
> current ALTO charter does not include items to define application
> behaviors, but it can be a point of discussion related to deployment.
>
> The most relevant component is C2. We discussed the following design
> points for C2:
> D-broadcast: network broadcasts its state
> D-pass-bounce: network marks its state on pass-through packets and the
> receiver bounces the state back to the sender
> D-direct-send: network sends its state to app directly
> Here by state it can be transformed state.
>
> Current ALTO is designed as D-direct-send. Due to lacking of deployment of
> D-direct-send in cellular network, aforementioned W1 uses D-broadcast; the
> D-pass-bounce design need at least a round trip time and couples network
> feedback flow with data flow, leading to the aforementioned W2 work.
>
> Many of us feel that the time is ready for introducing a highly efficient,
> flexible channel for network state exposure to applications, led by IETF,
> and the ALTO team can be a good starting point. As a first step, a
> systematic evaluation, which (1) surveys the design space and (2)
> introduces the use cases/benchmarking scenarios, can be a good starting
> point.
>
> If there is time available in the coming 114 meeting, we can discuss more
> during the presentation. Otherwise, on-list discussion is a good starting
> point. We will follow up with more analysis on the list soon but use this
> email to get the conversation started.
>
> Thanks,
>
> Richard on behalf of Tuesday meeting team
>
>
>
> ---------- Forwarded message ---------
> From: <[e-mail]>
> Date: Mon, Jul 11, 2022 at 2:14 PM
> Subject: New Version Notification for
> draft-huang-alto-mowie-for-network-aware-app-04.txt
> To: Y. Richard Yang <[e-mail]>, Gang Li <
> [e-mail]>, Sabine Randriamasy <
> [e-mail]>, Yixue Lei <[e-mail]>,
> Yuhang Jia <[e-mail]>, Yunbo Han <[e-mail]>,
> Yunfei Zhang <[e-mail]>
>
>
>
> A new version of I-D, draft-huang-alto-mowie-for-network-aware-app-04.txt
> has been successfully submitted by Y. Richard Yang and posted to the
> IETF repository.
>
> Name:           draft-huang-alto-mowie-for-network-aware-app
> Revision:       04
> Title:          MoWIE for Network Aware Applications
> Document date:  2022-07-11
> Group:          Individual Submission
> Pages:          25
> URL:
> https://www.ietf.org/archive/id/draft-huang-alto-mowie-for-network-aware-app-04.txt
> Status:
> https://datatracker.ietf.org/doc/draft-huang-alto-mowie-for-network-aware-app/
> Htmlized:
> https://datatracker.ietf.org/doc/html/draft-huang-alto-mowie-for-network-aware-app
> Diff:
> https://www.ietf.org/rfcdiff?url2=draft-huang-alto-mowie-for-network-aware-app-04
>
> Abstract:
>    With the quick deployment of 5G networks in the world, cloud-based
>    interactive applications (services) such as cloud gaming have gained
>    substantial attention and are regarded as potential killer
>    applications.  To ensure users' quality of experience (QoE), a cloud
>    interactive service may require not only high bandwidth (e.g., high-
>    resolution media transmission) but also low delay (e.g., low latency
>    and low lagging).  However, the bandwidth and delay experienced by a
>    mobile and wireless user can be dynamic, as a function of many
>    factors, and unhandled changes can substantially compromise the
>    user's QoE.  In this document, we investigate network-aware
>    applications (NAA), which realize cloud based interactive services
>    with improved QoE, by efficient utilization of a solution named
>    Mobile and Wireless Information Exposure (MoWIE).  In particular,
>    this document demonstrates, through realistic evaluations, that
>    mobile network information such as MCS (Modulation and Coding Scheme)
>    can effectively expose the dynamicity of the underlying network and
>    can be made available to applications through MoWIE; using such
>    information, the applications can then adapt key control knobs such
>    as media codec scheme, encapsulation, and application layer
>    processing to minimize QoE deduction.  Based on the evaluations, we
>    discuss how the MoWIE features can define extensions of the ALTO
>    protocol, to expose more lower-layer and finer grain network
>    dynamics.
>
>
>
>
> The IETF Secretariat
>
>
> --
> Richard
>


-- 
Cheers,
----------------
Zili Meng
Web: https://zilimeng.com