Re: [v6ops] unicast RA to save battery: link-layer joining multicast groups

Alexandru Petrescu <alexandru.petrescu@gmail.com> Wed, 22 July 2015 12:06 UTC

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From: Alexandru Petrescu <alexandru.petrescu@gmail.com>
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Date: Wed, 22 Jul 2015 14:06:39 +0200
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Subject: Re: [v6ops] unicast RA to save battery: link-layer joining multicast groups
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Thanks for the pointer, but that's a long discussion, it's hard to draw 
quickly a conclusion on it.

I would think to argue that if Android has a problem in this then it's 
an Android problem.

If it's a particular driver problem (dependent on the card of that 
samsung phone) then fix that problem.

Maybe it's not so.

But I am sure the linux devices I use dont consume more power when 
receiving more RAs, on wifi.

And even if they did, I have enough batteries and enough other sources 
of energy to provide them in order to be able to make handovers fast 
enough to not loose 1 single packet.

Not sure whether the goal here is to save energy?

Alex

Le 22/07/2015 10:34, Andrew 👽  Yourtchenko a écrit :
> This is what some phones do today and is exactly the problem we are
> trying to solve.
>
> https://code.google.com/p/android/issues/detail?id=32662
>
> --a
>
> On 7/21/15, Alexandru Petrescu <alexandru.petrescu@gmail.com>; wrote:
>> On another hand,
>>
>> IEEE 802.11bgn multicast groups (33::1 etc) are 'joined' at MAC layer by
>> setting filters.  (maybe even by MAC messaging for joining MAC multicast
>> groups).
>>
>> Maybe we can request the Hosts to set local filters to not receive
>> multicast RAs.  Or request the Hosts short on energy to express interest
>> in these IPv6 multicast groups.
>>
>> Alex
>>
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>