How many VoIP calls does BreezeACCESS VL support at MOS ~ 4.0 in a noisy
environment, such as when SNR is <= 10? How about <= 3?
Yes, I already know the answer to these. Maybe it was unfair for me to ask.
The issue that you conveniently side-step is that service providers
operating in unlicensed spectrum operate in noise, as they do not have
control over other users of the same spectrum.
For me, because I know I do not fully control RF conditions, the ability to
reliably deliver packets reliably, even in the presence of interference,
trumps the in-lab performance of equipment where no noise exists, which I
don't see as an indicator of reality.
Dave
----- Original Message -----
From: "Patrick Leary" <[EMAIL PROTECTED]>
To: "WISPA General List" <wireless@wispa.org>
Sent: Friday, January 05, 2007 3:12 PM
Subject: [WISPA] churn,double play and why WLP is key - I finally understand
it
...So I'm here at our annual national meeting and our project manager is
explaining the Wireless Link Prioritization feature available for
BreezeACCESS VL. Frankly, it has always seemed esoteric to those of us
non-technical types, but now I got and it is simple enough.
First, I learned the statistical improvement in churn when a provider
has double play VoIP + data customers. We have had a few CLECs report to
us that with a single play model their churn is about 9%. Adding double
play takes it down to close to 1%. This is critical to the business
model because they said a 10% reduction in churn translates into about a
20% improvement in NPV per subscriber. That's obviously huge. So what's
the WLP feature available in BreezeACCESS VL have to do with any of
this?
BreezeACCESS VL can already do QoS priority tagging of packets per CPE
using layer 2 (802.11p), layer 3 (IP TOS, DSCP) or layer 4 (TCP/UDP port
ranges common with Cisco, for example). That's good and already better
than most brands of BWA gear. BUT, that's only PER CPE. In a typical
situation, this does not help at all when multiple CPE are on a sector
-- there is no prioritization at the RF level in unlicensed from any
brand...until now.
WLP (also called multimedia application prioritization) actually solves
this and enables over-the-air prioritization for the first time in the
industry. The translation for this is that BreezeACCESS VL can now
deliver massive VoIP, up to 288 concurrent calls per sector with a MOS
(mean opinion score - a rating of voice quality) of 4.1. That's a
phenomenal quantity that is more than 10x our main competitor as spelled
out in their own relevant VoIP document.
So why not just use VL with firmware version 4.0 without getting the WLP
feature? The WLP is the key to get the quantity AND THE QUALITY of
service since it reserves air priority for the VoIP. So, in a double
play business model, it is essential to get MOS voice quality of at
least 4.1 and even 4.33 you must implement the WLP.
I believe it can now be said without reservation, that if you are using
unlicensed and wanting to implement a double play of VoIP + data, the
ONLY product out there that can do it in scale and with toll quality is
BreezeACCESS VL.
Regards,
Patrick Leary
AVP WISP Markets
Alvarion, Inc.
o: 650.314.2628
c: 760.580.0080
Vonage: 650.641.1243
[EMAIL PROTECTED]
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