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Re: [manet] Routing in emerging LEO satellite networks

Abdussalam Baryun <abdussalambaryun@gmail.com> Wed, 08 November 2023 10:52 UTC

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From: Abdussalam Baryun <abdussalambaryun@gmail.com>
Date: Wed, 08 Nov 2023 12:40:13 +0200
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To: Henning Rogge <hrogge@gmail.com>, "zeqilai@tsinghua.edu.cn" <zeqilai@tsinghua.edu.cn>
Cc: "manet@ietf.org" <manet@ietf.org>, zhangqi <zhangqi@zgclab.edu.cn>, wuqian <wuqian@cernet.edu.cn>, lihewu <lihewu@cernet.edu.cn>
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Subject: Re: [manet] Routing in emerging LEO satellite networks
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Hi Zegi,

I agree with Henning it is not similar to ad hoc network or not well
defined by 3GPP, however, we need in this WG to first define new use cases
of LEO that is ad hoc, and that is why my presentation was proposing update
to RFC2501, which I am working on informational draft for this WG and hope
to get others to join with me to author.

Best Regards
AB

On Wed, Nov 8, 2023 at 9:59 AM Henning Rogge <hrogge@gmail.com> wrote:

> On Wed, Nov 8, 2023 at 8:48 AM zeqilai@tsinghua.edu.cn
> <zeqilai@tsinghua.edu.cn> wrote:
> >
> > Hi all MANET:
> >
> > Thanks for the nice talks in IETF 118. As a new attendee, I learnt a lot.
> >
> > I am currently an assistant professor at Tsinghua University, and our
> group are working on the internetworking technologies in the upcoming LEO
> satellite networks (LSN).
> >
> > One important direction of our research is exploring how to achieve
> scalable and robust routing in LSNs. And we have many recent efforts in
> this direction. Some have been published in the research conference of
> computer networks.
> >
> > Here are some of our recent research works:
> >
> > (1) Routing in LSN:
> https://ieeexplore.ieee.org/abstract/document/9651919
> > (2) Space-Groud topology design:
> https://ieeexplore.ieee.org/abstract/document/9796886
> > (3) Simulation platform for LSN (with open source implementation):
> https://www.usenix.org/conference/nsdi23/presentation/lai-zeqi
> >
> > We believe LSN has many similar features with conventional mobile ad-hoc
> networks, just like the high mobility, frequent handovers, unstable
> communication links, etc.
>
> I am not sure about the similarities to adhoc networks... all orbits
> of satellites in a LEO mega constellation are known, so each node can
> calculate in advance when a communication link becomes available and
> when it will fail.
>
> This means you can calculate a path towards the target without ever
> doing something like neighbor or path discovery, just by knowing the
> time and all relevant orbits. Or maybe I am missing something?
>
> Henning Rogge
>
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