[Sis-csi] No telecon tomorrow 10/19 -- status by email

[Ivancic, William D. (GRC-RCN0)]

	From: sis-csi-bounces at mailman.ccsds.org
[mailto:sis-csi-bounces at mailman.ccsds.org] On Behalf Of Scott, Keith L.
	Sent: Wednesday, October 18, 2006 10:50 AM
	To: sis-csi at mailman.ccsds.org
	Subject: [Sis-csi] No telecon tomorrow 10/19 -- status by email
	
	
	I'm going to be stuck in a project review meeting and then other
stuff tomorrow afternoon.  If anybody has status, please send to the
list.
	 
	In particular, if anybody has thoughts on testing unnumbered
interfaces or thoughts on a numbering plan, that'd be great.
	 
	        --keith


Keith and All,

I am trying to get a colleague to work the problem statement below.  He
is somewhat new to this area and will require guidance so I am not sure
how quickly we will have all of the answers.   

If any there are any revisions or additions to the problem stated below,
please let me know so we can address these.

Will

> The Cis-Lunar working group of CCSDS is looking at how to perform 
> routing for space-based systems.  There are a number of questions that

> are relatively bounded and can be looked at using a few routers and 
> some switches and, if they exists,
> serial hubs.   This would be a nice, bounded, project that is 
> relevant today.
> 
> Some of these issues also arise in the aeronautics community.  
> 
> 
> 
> 
>                   .-----. S-SC1B            S-SC2B .-----.
>                   |SC #1|....                ......|SC #2|
>                   `--+--'                          `--+--'
>               S-SC1A |                                | S-SC2A
>                      |                                |
>                      |                                |
>                                                       |
> 
>            |                               |
>            | S-GS1A                        | S-GS2A
>            |                               |
>         +--+--+                         +--+--+
>         |GS #1|                         |GS #2|
>         +--+--+                         +--+--+
>             `.                           .'
>               \  ___,,..............____/
>             ,-'':       INTERNET        ''`-.
>             '-...____               ____..,-'
>                      `''''''''''''''
> 
> 
> Definitions:
> S- is a serial link and implies radio RF link GS is gound system SC is

> spacecraft
> 
> Assumptions:
> 
> Assume all spacecraft serial links are connected to software defined 
> radios such that any space link can talk to any ground or spacecraft.
> S-GS1A and S-GS2A are on different subnets
> 
> Question/Problem:
> 
> If SC#2 wishes to talk through SC#1 to GS#1, must S-SC2B be in the 
> same subnet as S-SC1B?
> If S-SC1A and S-SC1B are in the same subnet, can I dynamically route 
> or is there a problem here (we think there is)?
> Can IPv6 solve some of this?
> Others
>