What is a "session"?

[Erik Nordmark <Erik.Nordmark@eng.sun.com>]

draft-reynolds-mobile-isp-requirements-00 talks about session mobility
without carefully defining a session.
It lists http as well as ftp as being sessions and goes on to require
session mobility from one device to another (from the phone to the laptop).

What drives this requirement?
I think it is rather hard to build the necessary mechanisms (and get
interoperability) so that you can transfer not only the TCP connection
state (in order to get ftp session mobility) but also the application
state (the cookies, sessionids, SSL state and everything else that an http
browser maintains) so that you can move the http session from the
(small) browser in the phone to the (larger) browser in the laptop
and vice versa.

So I'm quite concerned by this requirement as stated.

  Erik