Path: utzoo!attcan!uunet!nems!ark1!uakari.primate.wisc.edu!zaphod.mps.ohio-state.edu!usc!ucsd!ucbvax!MCL.UNISYS.COM!perry
From: perry@MCL.UNISYS.COM (Dennis Perry)
Newsgroups: comp.protocols.tcp-ip
Subject: Re: Mobile TCP/IP (was Re: Can subnets be separated by another net?)
Message-ID: <9007171628.AA02986@LANAI.MCL.UNISYS.COM>
Date: 17 Jul 90 16:28:55 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 34


	Date: 13 Jul 90 17:41:23 GMT
	From: intercon!news@uunet.uu.net  (Amanda Walker)
	Organization: InterCon Systems Corporation, Herndon, VA

	.
	.
	In all of the cellular systems I've used so far, roaming is only half
	automatic.  In particular, to place a call to a roamer, you have to 
	dial
	the roamer access number for the area where they are, and then dial 
	their
	phone number.  This amounts to source routing, which is even more of a
	pain for mobile destinations than it is for "static" ones.  Bleah.
	
	Maybe Motorola's proposed satellite-based cellular system will be 
	better.
	
	That's it!  We put the core gateways into geosynchronous orbit... :-)
	
	--
	Amanda Walker <amanda@intercon.com>
	Postmaster With An Attitude
	InterCon Systems Corporation
	
_________________

Actually, thought along this line exist, i.e. put the gateways in the 
satellite.  We thought of doing this at DARPA when I was there and we also
explored such issues with the Multiple Satellite Program, an upto 200 node
packet switched global communications network.  With the demise of MILSTAR
perhaps the light satellite concept will gain momentum.

dennis