More of a question for the programmers than I.
My own conclusions are:
Although the AP and CPE has no idea that there is a BWM, the BWM itself seems
to limit the air time by allowing the customer to transmit in bursts. Near as
I can tell.. when transmitting and receiving the traffic que will fill a
buffer when data comes too quickly, and just blocks packets when full. Then it
transmits the data to the customer at the specific data rate. I also notice
that the bandwidth manager adds latency depending on the speed. At 256 it will
add about 50ms to whatever the customer already has to the device.
I encourage someone with greater knowledge on the subject to chime in with
specifics...
-----Original Message-----
From: Kevin Knuth [mailto:kknuth@karlnet.com]
Sent: Tuesday, July 15, 2003 10:39 AM
To: Karlnet Mailing List
Subject: RE: [Karlnet] bandwidth management
Time for me to learn something here:
My question about Bandwidth Control Units is this: How do they limit the
amount of bandwidth a customer gets? Does it actually stop the wireless
device from trying to send data? I would think that is impossible. So if
it does not actually control the CPE, aren't you creating more RF
interference as units will continually try sending their packets to the AP?
I have never really got a straight answer on this from anyone, so help will
be appreciated.
Kevin
-----Original Message-----
From: karlnet-bounces@WISPNotes.com
[mailto:karlnet-bounces@WISPNotes.com]On Behalf Of Andy Henckel
Sent: Tuesday, July 15, 2003 10:55 AM
To: Karlnet Mailing List
Subject: RE: [Karlnet] bandwidth management
Once you get 250 customers on the same bridged wireless network, I'd say
throttling at cpe is a must. One single unit presents a single point of
failure, and the inability to isolate network problems to one site. We have
been using YDI bandwidth manager for our wireless network. Without it,
people can and will use all of the available bandwidth. Probably only a
handful of our customers use the connection like that. It is essential to
give everyone a chance to get bandwidth. We have recently added turbocell
with one of many benefits being the ability to set speed on the CPE or on
the BASE.
-----Original Message-----
From: LaRoy McCann [mailto:lmccann@roachconveyors.com]
Sent: Tuesday, July 15, 2003 9:37 AM
To: karlnet@WISPNotes.com
Subject: [Karlnet] bandwidth management
What are everyone's opinion on bandwidth control.
Is it better to do it on each cpe or to have a single point at the head end
to manage all bandwidth for users?
What type of hardware/software is being used for single point bandwidth
management?
Thanks.
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