[Cerowrt-devel] Open Source RRM & Hand-Over Optimization (WAS: Throughput regression with `tcp: refine TSO autosizing`)

Avery Pennarun apenwarr at google.com
Mon Feb 2 17:53:02 EST 2015

On Mon, Feb 2, 2015 at 11:44 AM, Björn Smedman <bs at anyfi.net> wrote:
> On Mon, Feb 2, 2015 at 5:21 AM, Avery Pennarun <apenwarr at google.com> wrote:
>> While there is definitely some work to be done in handoff, it seems
>> like there are some find implementations of this already in existence.
>> Several brands of "enterprise access point" setups seem to do well at
>> this.  It would be nice if they interoperated, I guess.
>> The fact that there's no open source version of this kind of handoff
>> feature bugs me, but we are working on it here and the work is all
>> planned to be open source, for example: (very early version)
>> https://gfiber.googlesource.com/vendor/google/platform/+/master/waveguide/
> We've got an SDN-inspired architecture with 802.11 frame tunneling (a
> la CAPWAP), airtime fairness, infrastructure initiated hand-over,
> Opportunistic Key Caching (OKC), IEEE 802.11r Fast BSS Transition and
> a few more goodies. It's currently free as in beer
> (http://anyfi.net/software,
> https://github.com/carrierwrt/carrierwrt/pull/7 and
> http://www.anyfinetworks.com/download) up to 100 APs, but we're
> definitely going to open source in one form or another.
> We've also tried to raise some interest in fixing up CAPWAP
> (https://www.ietf.org/mail-archive/web/opsawg/current/msg03196.html),
> which is (unfortunately) the best open standard at the moment.
> Interest seems marginal though...

This sounds cool.  Is the CAPWAP/encapsulation stuff separable from
the rest?  At 802.11ac speeds, a super fast WAN link, and a low-cost
SoC, too many layers can be a killer.

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