Re: [Idr] [Int-area] New Version Notification for draft-lhan-problems-requirements-satellite-net-00.txt

Lin Han <lin.han@futurewei.com> Thu, 08 July 2021 22:22 UTC

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From: Lin Han <lin.han@futurewei.com>
To: Hesham ElBakoury <helbakoury@gmail.com>
CC: Stewart Bryant <stewart.bryant@gmail.com>, "Int-area@ietf.org" <Int-area@ietf.org>, "SARAH@JISCMAIL.AC.UK" <SARAH@jiscmail.ac.uk>, "rtgwg@ietf.org" <rtgwg@ietf.org>, "UTTARO, JAMES" <ju1738@att.com>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Int-area] New Version Notification for draft-lhan-problems-requirements-satellite-net-00.txt
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/Ewu7DIZPMlXMGUQTieTi_iOf0ms>
Subject: Re: [Idr] [Int-area] New Version Notification for draft-lhan-problems-requirements-satellite-net-00.txt
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Hesham,

Thanks for the answer.
I don't have too many concerns for this regard, and it may be out the scope of the draft.

Satellite to ground station communication needs license for its spectrum in different country and LI is feasible.
But ISL is between satellites. LI may not be a feasible requirement: 1) Satellites are in out space that is not belonging to any country, so I doubt any country can have such legal requirement for ISL. 2) ISL use laser that is not a spectrum controlled by any country or organization. 3) LI for ISL is so costly and seems not likely. You need to get FCC or other organization's approve for the new orbit to launch a new satellite and its orbit is very close to the existing satellite, this itself is almost impossible. I don't see any other feasible way you can do LI for ISL if laser is used for ISL.

Regards

Lin


From: Hesham ElBakoury <helbakoury@gmail.com>
Sent: Thursday, July 8, 2021 10:57 AM
To: Lin Han <lin.han@futurewei.com>
Cc: Stewart Bryant <stewart.bryant@gmail.com>om>; Int-area@ietf.org; SARAH@JISCMAIL.AC.UK; rtgwg@ietf.org; UTTARO, JAMES <ju1738@att.com>om>; idr@ietf.org
Subject: Re: [Int-area] New Version Notification for draft-lhan-problems-requirements-satellite-net-00.txt

I think LI means Lawful Intercept.
It is a security issue. I recall seeing some ETSI documents about it.

Hesham

On Thu, Jul 8, 2021, 10:52 AM Lin Han <lin.han@futurewei.com<mailto:lin.han@futurewei.com>> wrote:
Hi, Stewart,

What does "LI" stand for?
ISL is not mature enough for real adoption.
The academia research suggested to use laser instead of microwave. When laser is used for ISL, there should not have spectrum license issue, I don't see the ITU or USA has spectrum allocation for the frequency of laser (400THz~700THz).

Lin

From: Stewart Bryant <stewart.bryant@gmail.com<mailto:stewart.bryant@gmail.com>>
Sent: Thursday, July 8, 2021 7:19 AM
To: Hesham ElBakoury <helbakoury@gmail.com<mailto:helbakoury@gmail.com>>
Cc: Stewart Bryant <stewart.bryant@gmail.com<mailto:stewart.bryant@gmail.com>>; Lin Han <lin.han@futurewei.com<mailto:lin.han@futurewei.com>>; Int-area@ietf.org<mailto:Int-area@ietf.org>; SARAH@JISCMAIL.AC.UK<mailto:SARAH@JISCMAIL.AC.UK>; rtgwg@ietf.org<mailto:rtgwg@ietf.org>; UTTARO, JAMES <ju1738@att.com<mailto:ju1738@att.com>>; idr@ietf.org<mailto:idr@ietf.org>
Subject: Re: [Int-area] New Version Notification for draft-lhan-problems-requirements-satellite-net-00.txt

The thing that worries me about iSL is whether the inability to do LI will prohibit licensing in some countries.

- Stewart



On 7 Jul 2021, at 03:51, Hesham ElBakoury <helbakoury@gmail.com<mailto:helbakoury@gmail.com>> wrote:

Mark Handley published the paper "Using ground relays for low-latency wide-area routing in megaconstellations" to show that even if we do not have ISL we can use ground terminals to route traffic with better latency than fiber links.

Thanks
Hesham


On Tue, Jul 6, 2021, 10:08 AM Lin Han <lin.han@futurewei.com<mailto:lin.han@futurewei.com>> wrote:
Hi, Jim

I don't have clear answer.
What I can guess now is that most of current technologies (with enhancement) can be used, but some new technologies might be needed to solve the satellite specific issues, such as fast mobility, frequent topology changes, constraints in satellite power, security in open space, etc.
It is up to the community to decide what new technologies and what new protocols will be developed.

Regards

Lin


-----Original Message-----
From: UTTARO, JAMES <ju1738@att.com<mailto:ju1738@att.com>>
Sent: Tuesday, July 6, 2021 7:20 AM
To: Lin Han <lin.han@futurewei.com<mailto:lin.han@futurewei.com>>; Int-area@ietf.org<mailto:Int-area@ietf.org>; idr@ietf.org<mailto:idr@ietf.org>; rtgwg@ietf.org<mailto:rtgwg@ietf.org>
Cc: SARAH@JISCMAIL.AC.UK<mailto:SARAH@JISCMAIL.AC.UK>
Subject: RE: New Version Notification for draft-lhan-problems-requirements-satellite-net-00.txt

Lin,

        Are you suggesting that the current set of protocols can be used with or without enhancements or is the uniqueness of the satellite network require new protocol(s) to address the architecture you have laid out..

Thanks,
        Jim Uttaro

-----Original Message-----
From: Idr <idr-bounces@ietf.org<mailto:idr-bounces@ietf.org>> On Behalf Of Lin Han
Sent: Saturday, July 03, 2021 8:41 PM
To: Int-area@ietf.org<mailto:Int-area@ietf.org>; idr@ietf.org<mailto:idr@ietf.org>; rtgwg@ietf.org<mailto:rtgwg@ietf.org>
Cc: SARAH@JISCMAIL.AC.UK<mailto:SARAH@JISCMAIL.AC.UK>
Subject: [Idr] FW: New Version Notification for draft-lhan-problems-requirements-satellite-net-00.txt

Hi,

This draft analyzed the problems and requirements for the satellite network when it is integrated with Internet by current routing technologies.
It may be relevant and interesting to internet, BGP, IGP. The further solution proposals may also come from different groups including research initiative SARAH.

Look forwarding to discussion and comments.

Thanks

Lin

-----Original Message-----
From: internet-drafts@ietf.org<mailto:internet-drafts@ietf.org> <internet-drafts@ietf.org<mailto:internet-drafts@ietf.org>>
Sent: Saturday, July 3, 2021 5:07 PM
To: Lin Han <lin.han@futurewei.com<mailto:lin.han@futurewei.com>>; Richard Li <richard.li@futurewei.com<mailto:richard.li@futurewei.com>>
Subject: New Version Notification for draft-lhan-problems-requirements-satellite-net-00.txt


A new version of I-D, draft-lhan-problems-requirements-satellite-net-00.txt
has been successfully submitted by Lin Han and posted to the IETF repository.

Name:           draft-lhan-problems-requirements-satellite-net
Revision:       00
Title:          Problems and Requirements of Satellite Constellation for Internet
Document date:  2021-07-03
Group:          Individual Submission
Pages:          32
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Abstract:
   This document presents the detailed analysis about the problems and
   requirements of satellite constellation used for Internet.  It starts
   from the satellite orbit basics, coverage calculation, then it
   estimates the time constraints for the communications between
   satellite and ground-station, also between satellites.  How to use
   satellite constellation for Internet is discussed in details
   including the satellite relay and satellite networking.  The problems
   and requirements of using traditional network technology for
   satellite network integrating with Internet are finally outlined.




The IETF Secretariat


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