iqnets: opportunistic XYZ, e.g. "begin xmit"

[Zenaan Harkness]

On Thu, Oct 31, 2019 at 02:36:27PM +1100, Zenaan Harkness wrote:
> >   - When we do achieve internet wide QoS contracts at the network
> >     layer, a privacy issue (depending on your threat model) will be
> >     which QoS modes to utilize - e.g. you may be better off using
> >     "bulk fill", rather than "telephone audio" class QoS, in order to
> >     better hide your important phone call.
> 
> One way to use bulk fill for real time data, is for links (i.e. peer
> nodes), to simply "maintain excess headroom during requisite (phone
> call) time".
> 
> This implies the need to hide a node's (downwards) phys link
> utilization:
> 
>   - either all nodes always reserve a relevant phys link %, e.g.:
>     - 2%, or 10KiB/s, whichever is greater,
>     - unless total phys link is less than 30 KiB/s,
>       in which case this node must essentially act as a client only
>       node (a comparatively unsafe option (presumably))

  - or, we institute a randomization protocol, so that at one time or
    another links are "normally, but randomly" headroom shaped down a
    bit

Again, achieving actual randomness, ain't easy.

And we must (!) modulo against user requirements as well, every time
we plan to institute some randomization scheme.

Further, for the use case of phone calls, we are talking randomized
appearance of "headroom shaped routes", and -not- randomized
appearance of "headroom shaped links" - these are similar, but quite
different, things.

Phone calls require routes.

If all "usable" links are independent, (link set) intersections
constituting usable links would be greatly diminished - ahh,
probably, since perhaps not - if we consider links between known
friends, where such links (when they randomly appear) can be used as
single hop p2p link for phone calls.

Maths, especially statistical, set and algebraic math, can be pretty
interesting since it can be so useful.