[e2e] Satellite networks latency and data corruption

[Craig Partridge]

>My question was specific to ARQ strategies and the latency induced due 
>to the same.
>
>I understand that the media is highly error prone but was wondering what 
>is the performance difference if I do :
>
>Host1-----Satellite--Satellite---Host2
>                  |                     |
>Host3------+                    +---------Host4
>
>with
>
>a. no ACK/ARQ "per hop".
>versus
>b. only endhost to end host ARQs/ACKs model. (basically leaving all flow 
>releated and error recovery operations to the end hosts).

Depends, I think, on your metric of cost/success.

The answer if you're trying to minimize the number of packets sent is that you
better do hop-by-hop ACK if the error rate is at all bad (as well as E2E ACKs).
Not sure what you get if you seek to minimize delay or maximize throughput.

Craig