[ih] TCP RTT Estimator

[Greg Skinner]

On Mar 26, 2025, at 1:46 PM, Barbara Denny via Internet-history <internet-history at elists.isoc.org> wrote:
> 
> Saw Vint's message after I started this one so adding Don Nielson to this thread too.  
> I would like to mention the PRnet in the Bay Area was larger than 2 nodes.   I am guessing you are referring to the diagram I sent out for the 1976 demo/test.  That diagram shows the path the packets took to reach SRI from Rissotti's.  I am trying to find out if the rest of the network wasn't deployed in 1976 but I haven't been able to track it down.  If you look at the DTIC reference Greg Skinner provided previously (https://apps.dtic.mil/sti/tr/pdf/ADA157696.pdf),  there are diagrams starting at page 244 that show more of the Bay Area PR network in that report .  It includes sites at Grizzly Peak, Mission Peak, Mt. San Bruno, etc.  I am not sure I ever got a copy when I was at BBN so I don't feel I can comment if some of the node locations would change based on what connectivity was needed.
> BTW,  was the repeater marked Eichler in the 1976 demo diagram perhaps near/at Stanford's Dish (Don?/Vint?)? I think most people don't realize the Dish belongs to SRI and not Stanford.
> barbara

A map on the ''40th anniversary of the Internet page'' shows the Eichler site as 6 km (roughly) south of SRI.  According to Google Maps, the Stanford Dish is about 3.27 miles (roughly) south of SRI HQ.

BTW, Jim Mathis’ TIU implementation is available on Noel Chiappa’s ana-3.lcs.mit.edu <http://ana-3.lcs.mit.edu/> site. [1]  The documentation is dated April 1979.

--gregbo

[1] http://ana-3.lcs.mit.edu/~jnc/tech/mos/