[ih] History question -- multi-homing

[John Day]

I don’t know much. But today the base station does the handoff. (Early phones didn’t have the power to do it. (And probably because phone companies are control freaks.) ;-) So far as I know they are never multihomed in a real sense.

I do know one company in the UK was looking into it, but their architecture would have problems doin it,

John

> On Sep 13, 2026, at 06:55, vinton cerf <vgcerf at gmail.com> wrote:
> 
> seems as if they might lose each other unless there is confirmation of the receipt of a new locator before the change? Either that or some agreed rendezvous point that doesn't change?
> 
> Do you know how this is handled in mobile telephony? Is there a moment when multiple base stations are aware of or serve the same mobile call? Of course, the base stations don't "move" so that helps, since the mobiles know about signal levels from multiple base stations. 
> v
> 
> 
> On Sun, Sep 13, 2026 at 6:47 AM John Day <jeanjour at comcast.net <mailto:jeanjour at comcast.net>> wrote:
>> Depends on whether their point of attachment changes. Each is somewhere at any point in time.
>> 
>> Or as Firesign Theater said:
>> How Can You Be in Two Places at Once, When You Are No Place At All.  ;-)
>> 
>> > On Sep 13, 2026, at 05:19, vinton cerf via Internet-history <internet-history at elists.isoc.org <mailto:internet-history at elists.isoc.org>> wrote:
>> > 
>> > what happens if two corresponding nodes change their locators at the same
>> > time?
>> > 
>> > v
>> > 
>> > 
>> > On Sat, Sep 12, 2026 at 12:15 PM vinton cerf <vgcerf at gmail.com <mailto:vgcerf at gmail.com>> wrote:
>> > 
>> >> thanks tony.
>> >> v
>> >> 
>> >> 
>> >> On Sat, Sep 12, 2026 at 10:49 AM Tony Li <tony.li at tony.li <mailto:tony.li at tony.li>> wrote:
>> >> 
>> >>> 
>> >>> Hi Vint,
>> >>> 
>> >>>> It would be an interesting exercise to posit a different identification
>> >>>> scheme that would scale and also permit multi-homing. Has someone
>> >>> already
>> >>>> worked that out? Would it require a flat ID space?
>> >>> 
>> >>> 
>> >>> Please see RFC 6740.
>> >>> 
>> >>> Tony
>> >>> 
>> >>> 
>> > -- 
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