Re: [lisp] New Version Notification for draft-farinacci-lisp-satellite-network-00.txt

[Sharon Barkai <[e-mail]>]

Ok fixed.

Tiles have dimensions so better then GPS, but if these 1000s of new sats move in completely different general tiers around the earth, we can enumerate them and add to the H3IP. Theres spare bits cause smaller the city size tiles are irrelevant for this app - unlike the vehicle lisp app. In any case H3ID is just 64bits.

I don't know how the RF works, but if we know at each given moment which sat-mac is in which H3IP we can have the GSxTR source plot the segments. Overlay can be a good way to drive a dynamic underlay, connecting the ground IPs through the sky IPs. Anyway interesting domain if its not already solved. 

--szb
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> On Apr 4, 2022, at 20:38, Dino Farinacci <[e-mail]> wrote:
> 
> 
>> 
>> I thought the tiles have RLOCs and theres a live applet that can tell you at any given sec which tile is occupied by a sat and becomes its RLOC.
>> But maybe i misunderstood the preso. 
> 
> Copying the really nicely drawn diagram below for reference.
> 
> So if you wanted to do geographical addressing and map it to RLOCs that you could have connectivity to, that could work. This is a new idea (your idea) and we should think about it. This is how I envision it could be implemented by the LISP protocol:
> 
> (1) The H3 index-id is stored in mapping system as a distinguished-name EID.
> (2) The EID maps to a RLOC-set which is a list of routable IP addresses inside a particular tile (at any resolution).
> 
> The assumption is, if you are in a larger resolution tile, you may have reachability to the RLOCs for the tiles within your resolution. The path a packet may take could (obviously) leave the tile resoltuion area so you are not guaranteed a  shortest topological path. RLOC-probing could test one-way latency and RTT to determine if the packet is leaving the area. With more distributed and decentrailzied wireless networks out there, there is a possibility packets can stay "within tile resolution".
> 
> One comment on the diagram below. Its just a presentation commemnt. If you draw the word "RLOC" next to a satellite, it implies it could be registered in the mapping system and therefore runs as a LISP xTR. Theoretctically this can be the case but, again, we are not proposing this for the early work on draft-farinacci-lisp-satellite-network.
> 
> Also, if you change "GS RTR" below to "GS xTR" then you have drawn the same diagram as the draft has. Making the label "xTR" means it can be any of ITR, ETR, pITR, pETR, and RTR. So more general.
> 
> So another question, if the GS-xTR and a satellite are in the same H3 resolution does it mean the satellite have the field of view of the GS-xTR. If that is the case, we may be able to explore this idea.
> 
> One more comment, maybe using GPS is better because you have 3-dimensionality where H3 is 2D. Comments? With 3D you can imply that one sat is in a closer orbit to earth than another sat.
> 
> Thanks for the comments,
> Dino
> 
> 
>