[orbit-user] Sending rate limit for broadcast traffic in wireless communication?

Haris Kremo harisk at winlab.rutgers.edu
Thu Feb 26 17:54:22 EST 2009


broadcast it suppose to go with the lowest rate so that all nodes in
the range can hear it

this tells me that you are using 11b and 1Mbps is the rate at which
broadcast is transmitted in accordance to the standard

if you use 11g or 11a you can broadcast at 6Mbps

hope it helps,

H.

On 2/26/09, Li, Xiaozhou <xiaozhou at seas.upenn.edu> wrote:
>
>
>
>
> Hi,
>
>
>
> I did some test on the sandbox 7 for wireless communication. I wrote python
> code to let two nodes send packets to each other, using ath0 card.
>
>
>
> It performs very well when I use unicast to send packets. However, if I
> change the destination IP address to 192.168.255.255, the sending rate of
> each node never exceeds 1Mbps.
>
>
>
> I wish to know that if there is any maximum sending rate limitation for
> broadcast traffic for the
>
> ath0 card?
>
>
>
> Thank you very much!
>
>
>
>
>
> The following is the configurations of the ath0 card from the ‘iwconfig’
>
> :
>
>
>
> Mode:Ad-Hoc  Frequency:2.462 GHz  Cell: 74:65:73:74:2D:70
>
> Bit Rate=11 Mb/s   Tx-Power=1 dBm   Sensitivity=1/1
>
> Retry:on   RTS thr:off   Fragment thr:off
>
> Encryption key:off
>
> Power Management:off
>
> Link Quality=17/70  Signal level=-69 dBm  Noise level=-86 dBm
>
>
>
>
>
>
>
> Xiaozhou
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>


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