* Wireless network card capabilities
@ 2007-02-04 10:42 James Courtier-Dutton
2007-02-04 12:27 ` Ulrich Kunitz
2007-02-04 12:43 ` Johannes Berg
0 siblings, 2 replies; 4+ messages in thread
From: James Courtier-Dutton @ 2007-02-04 10:42 UTC (permalink / raw)
To: netdev
Hi,
Can Wireless network cards receive and transmit on two channels at once?
I am thinking of implementing a way for a wireless VoIP phone on Linux
being able to hand off from one AP to another without dropping the call.
For this to work, the wireless card must be able to chat on two channels
during the handover, so as to not loose any voice packets.
James
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Wireless network card capabilities
2007-02-04 10:42 Wireless network card capabilities James Courtier-Dutton
@ 2007-02-04 12:27 ` Ulrich Kunitz
2007-02-05 8:12 ` Ashwin Chaugule
2007-02-04 12:43 ` Johannes Berg
1 sibling, 1 reply; 4+ messages in thread
From: Ulrich Kunitz @ 2007-02-04 12:27 UTC (permalink / raw)
To: James Courtier-Dutton; +Cc: netdev
On 07-02-04 10:42 James Courtier-Dutton wrote:
> Hi,
>
> Can Wireless network cards receive and transmit on two channels at once?
> I am thinking of implementing a way for a wireless VoIP phone on Linux
> being able to hand off from one AP to another without dropping the call.
> For this to work, the wireless card must be able to chat on two channels
> during the handover, so as to not loose any voice packets.
>
> James
The easiest way to achieve this is to use two wireless adapters.
I'm not sure, whether there are adapters, which support parallel
reception on two channels and manage two independent
associations at the same time.
--
Uli Kunitz
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Wireless network card capabilities
2007-02-04 12:27 ` Ulrich Kunitz
@ 2007-02-05 8:12 ` Ashwin Chaugule
0 siblings, 0 replies; 4+ messages in thread
From: Ashwin Chaugule @ 2007-02-05 8:12 UTC (permalink / raw)
To: Ulrich Kunitz; +Cc: James Courtier-Dutton, netdev
On Sun, 2007-02-04 at 13:27 +0100, Ulrich Kunitz wrote:
> On 07-02-04 10:42 James Courtier-Dutton wrote:
>
> > Hi,
> >
> > Can Wireless network cards receive and transmit on two channels at once?
> > I am thinking of implementing a way for a wireless VoIP phone on Linux
> > being able to hand off from one AP to another without dropping the call.
> > For this to work, the wireless card must be able to chat on two channels
> > during the handover, so as to not loose any voice packets.
> >
> > James
>
> The easiest way to achieve this is to use two wireless adapters.
> I'm not sure, whether there are adapters, which support parallel
> reception on two channels and manage two independent
> associations at the same time.
>
Not too sure, but from what I've understood of Channel bonding, maybe
you could bind the 2 wifi ifaces using 2 adapters and linux's channel
bonding modules ?
Ashwin
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Wireless network card capabilities
2007-02-04 10:42 Wireless network card capabilities James Courtier-Dutton
2007-02-04 12:27 ` Ulrich Kunitz
@ 2007-02-04 12:43 ` Johannes Berg
1 sibling, 0 replies; 4+ messages in thread
From: Johannes Berg @ 2007-02-04 12:43 UTC (permalink / raw)
To: James Courtier-Dutton; +Cc: netdev
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James,
> Can Wireless network cards receive and transmit on two channels at once?
No cards that I know of contain two PHYs which would (afaict) be
required for this.
johannes
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^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2007-02-05 8:12 UTC | newest]
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2007-02-04 10:42 Wireless network card capabilities James Courtier-Dutton
2007-02-04 12:27 ` Ulrich Kunitz
2007-02-05 8:12 ` Ashwin Chaugule
2007-02-04 12:43 ` Johannes Berg
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