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Wireless network card capabilities

DISCUSSION James Courtier-Dutton 4 participants 4 messages Feb 4, 2007 – Feb 5, 2007

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James Courtier-Dutton

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#0 lore raw

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

#1 lore raw
Quoted 9 lines · 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.

Signature · 1 line
Uli Kunitz
#2 lore raw
Quoted 10 lines · Ulrich Kunitz
Quoted 8 lines · 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.

Quoted 7 lines
Quoted 1 line

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