[WISPA] heavy usage customers

[Chuck McCown]

With Canopy, you can decide how much bandwidth you want to set aside for 
ARQ.  It has its own slice of the overhead and you can limit it to 2 kbps if 
you want.  Most pick 20 kbps.  But it really isn't a factor.  With 120 on an 
AP at 5.8 with most of them subscribing to 512 Kbps 10.2 Mbps burst they do 
get 7 mS latency and everyone is happy.

----- Original Message ----- 
From: "Tom DeReggi" <wirelessnews at rapiddsl.net>
> The other big factor is ARQ. (ps. dont say Canopies don't need arq because
> their C/I allows them to not have interference :-)
> The benefits of ARQ are well proven and justifed, which is why Canopy and
> Trango supports it. If there are ARQ retransmissions, latency WILL rise. 
> You
> won;t see it from the AP side because the Pings go our right away, but 
> from
> the client, The ARQ needs to wait for its next time slice to retransmit.
>
> Again, I don't want to get into which manufacturer's ARQ is a better
> implementation. Just pointing out that ARQ is one of hte factors that
> prevents an ISP from knowing exactly what the latency is that the customer
> is experiencing, without testing from the customer side.