Re: Any tips on where per-packet antenna selection could be pushed?

[Ben Greear <greearb@candelatech.com>]

On 06/06/2016 10:24 AM, Zach Sherin wrote:
> I'm not sure I know exactly what you mean by per-peer. Do you mean
> that the antenna switches only when we're delivering to a new
> next-hop? I would absolutely be fine with that, by per-packet I do
> actually mean selection based on destination/next hop so aggregating
> deliveries for a single peer would be even better.
>
> Also, I forgot to mention that this is intended for static mesh
> networks, so I'm not worried about moment-to-moment changes in peer
> location.

Maybe some of the official QCA devs will have some ideas on how to do
this with stock firmware.

I am guessing you would have to have some API in the firmware that
could twiddle your antenna right before attempting to transmit a
frame?

Do you have physical output pins on your ath10k NIC to even do this?

Thanks,
Ben


>
> Thanks,
> Zach
>
> On Mon, Jun 6, 2016 at 1:21 PM, Ben Greear <greearb@candelatech.com> wrote:
>> On 06/06/2016 10:12 AM, Zach Sherin wrote:
>>>
>>> Hi all,
>>>
>>> I'm working on a device with antenna selection, similar to the ideas
>>> behind Ruckus or Google's Onhub router. I've been looking into a
>>> solution for per-packet antenna selection (based on destination/next
>>> hop). I was hoping this list might be able to suggest where I should
>>> investigate adding that switching code. My switches are currently USB
>>> RF switches, but I'm going to be using some serial protocol for the
>>> final version (we don't have much to switch, and it should be a single
>>> byte per packet).
>>>
>>> The last suggestion I received was to emulate Netsed [1] by routing
>>> all packets through a specific socket, running antenna selection, and
>>> then pushing them to their final destinations.
>>>
>>> I assumed that the best place to do antenna selection would be within
>>> ath10k itself (my devices all run on ath10k) so that I could introduce
>>> the minimum possible latency with antenna selection. Should I be
>>> looking at a different part of the networking stack?
>>>
>>> Does anyone have any suggestions, or perhaps an open-source project
>>> out there already trying to do antenna selection?
>>
>>
>> Would per-peer antenna selection work?  That is probably more easily
>> hacked into the firmware (I don't think stock firmware supports this
>> feature, but I could be wrong.)
>>
>> Thanks,
>> Ben
>>
>>>
>>> Thanks,
>>> Zach
>>>
>>>
>>> [1] http://silicone.homelinux.org/projects/netsed/
>>>
>>> _______________________________________________
>>> ath10k mailing list
>>> ath10k@lists.infradead.org
>>> http://lists.infradead.org/mailman/listinfo/ath10k
>>>
>>
>>
>> --
>> Ben Greear <greearb@candelatech.com>
>> Candela Technologies Inc  http://www.candelatech.com
>>
>


-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com


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