All of this and a great deal more is discussed in various old books,
such as:
- Internetwork Mobility - The CDPD Approach
Taylor, Waung and Banan
Prentice Hall
1996
ISBN: 0-13-209693-5
Hope this helps.
...Mohsen
On Wed, 18 Oct 2000 23:04:39 -0400, Keith Moore
<moore(_at_)cs(_dot_)utk(_dot_)edu> said:
>> >I would rather have one address for a wireless WAN interface and
>> >another address for a wireless LAN interface -- which seems to be
>> >doable today -- much more than I want to wait for the solution
>> >with "Mobile IP" address traversal to become commercially available.
>>
>> No, what you want is a serial number. Or at least what you describe
>> is a serial number. An address is very different.
Keith> the word "address" is used in so many different ways that any
Keith> argument of the form "x is/is not an address" tends to be
Keith> nothing more than an argument about which definition of the
Keith> word "will be master" (to quote Humpty Dumpty)
Keith> users don't care about whether their mobile device has one address
Keith> that follows it everywhere or whether it changes addresses as
Keith> it moves. however, depending on their needs, they might care about
Keith> their applications continuing to stay connected while they're mobile.
Keith> they might also care about running applications that are both mobile
Keith> and "always on".
Keith> any network stack that supports the latter two kinds of applications
Keith> will almost certainly employ (at least) two different sets of
Keith> things that could be called "addresses" - one which is stable
Keith> even while the device is mobile, and another which is less stable.
Keith> whether those two addresses look alike or different, whether
Keith> the technology used is "mobile IP" or something else , and
Keith> the level of the protocol stack at which the indirection occurs
Keith> - these are implementation choices.
Keith> of course, some implementation choices work better than others,
Keith> especially when it comes to interoperating with the wired Internet,
Keith> or in being able to support existing applications, or in being
Keith> able to switch from one communications medium to another. but
Keith> the implementation choice can quite reasonably be different
Keith> depending on the particular characteristics of the device and
Keith> its communications media, and also on the needs of its users.
Keith> Ketih