[ath9k-devel] Data rate in multicast case

[ath9k-devel] Data rate in multicast case

[Mitul Modi]

hi,

I dont know is it right mailing list for this question or not.

i am using ar5312 and i am getting only 4.5 mbps in case of multicast
traffic and upto 13 mbps in case of unicast traffic. Any clue?

thanks,
Mitul Modi
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[ath9k-devel] Data rate in multicast case

[Benoit PAPILLAULT]

Mitul Modi a ?crit :
> hi,
>
> I dont know is it right mailing list for this question or not.
>
> i am using ar5312 and i am getting only 4.5 mbps in case of multicast 
> traffic and upto 13 mbps in case of unicast traffic. Any clue?
>
> thanks,
> Mitul Modi
What channel are you using?
What is your setup? Does the multicast traffic is sent from STA to AP or 
the opposite ?

Unicast traffic is controlled by the rate control algorithm, trying to 
achieve the best performance.
Multicast traffic is not under the rate control algorithm and since it 
cannot be retransmitted, nor ACKed, it is transmitted at 1 Mbits rate in 
802.11bg and 6 Mbits rate in 802.11a.

Regards,
Benoit

[ath9k-devel] Data rate in multicast case

[Mitul Modi]

Hi,

Thanks for the reply.

Setup is simple PC1 <wired> STA <Wireless> AP <Wired Gateway> PC2. Multicast
traffic is going from PC1 to PC2.

So, rate control algorithm is there in hardware or in driver itself ?. I
have snifffe the packet using aeropic and found that the rate in multicast
frame is more that 6 Mbps.

Thanks,
Mitul Modi

On Fri, Apr 9, 2010 at 12:09 PM, Benoit PAPILLAULT <
benoit.papillault@free.fr> wrote:

> Mitul Modi a ?crit :
>
>  hi,
>>
>> I dont know is it right mailing list for this question or not.
>>
>> i am using ar5312 and i am getting only 4.5 mbps in case of multicast
>> traffic and upto 13 mbps in case of unicast traffic. Any clue?
>>
>> thanks,
>> Mitul Modi
>>
> What channel are you using?
> What is your setup? Does the multicast traffic is sent from STA to AP or
> the opposite ?
>
> Unicast traffic is controlled by the rate control algorithm, trying to
> achieve the best performance.
> Multicast traffic is not under the rate control algorithm and since it
> cannot be retransmitted, nor ACKed, it is transmitted at 1 Mbits rate in
> 802.11bg and 6 Mbits rate in 802.11a.
>
> Regards,
> Benoit
>
>
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[ath9k-devel] Data rate in multicast case

[Joerg Pommnitz]

Mitul Modi <mituld.modi <at> gmail.com> writes:

> 
> hi,I dont know is it right mailing list for this question or not.i am using
ar5312 and i am getting only 4.5 mbps in case of multicast traffic and upto 13
mbps in case of unicast traffic. Any clue?thanks,
> Mitul Modi
> 
> _______________________________________________
> ath9k-devel mailing list
> ath9k-devel <at> lists.ath9k.org
> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
> 

I currently have a discussion with Jouni about this
topic in linux-wireless. See 
http://article.gmane.org/gmane.linux.kernel.wireless.general/49048

Feel free to join our discussion!

Regards
  Joerg