On Tue, 2007-05-08 at 19:28 -0400, jamal wrote:

Wireless with CSMA/CA is a slightly different beast due to the shared
channels; its worse but not very different in nature than the case
where you have a shared ethernet hub (CSMA/CD) and you keep adding
hosts to it 

The difference is the hub provides the same transmission chance for all
the packets but in wireless, high priority packets will block low
priority packets transmission. You can argue there is still chances a
low priority packet is sent first before a high priority one. But this
is not the point of wireless QoS. It rarely happens and should be avoid
at best effort in the implementation.

Thanks,
-yi