Re: [RE] Technical Feasibility
Please elaborate on limitations. Our audio network (CobraNet) is .3 based
and absolutely supports synchronized playback.
-----Original Message-----
From: owner-stds-802-3-re@listserv.ieee.org
[mailto:owner-stds-802-3-re@listserv.ieee.org] On Behalf Of Jim Battaglia
Sent: Tuesday, August 31, 2004 1:08 PM
To: STDS-802-3-RE@listserv.ieee.org
Subject: Re: [RE] Technical Feasibility
Multi-node, synchronized playback is another important element of a a/v
friendly digital home network. This is also a limitation of the current
802.3 spec.
-Jim Battaglia
Digital Entertainment Networking
Pioneer Research Center USA, Inc.
415-305-6263 (mobile)
John Gildred wrote:
> One of the limitations in the current 802.3 specification is that there
> is no way to say "I need 20Mbps for my application until I say stop or
> timeout". This is absolutely necessary for AV across a point to point
> link (and eventually over a bridge). Currently priorities allow you to
> say "I need my application to be priority x" which may or may not be
> higher than other applications. And if two applications choose to use
> the same priority, then they will inevitably step on each other. Trying
> to manage this at higher levels (higher than 802.3) is much more
> difficult and expensive.
>
> Deterministic latency is part of this requirement. This is not just a
> problem over a bridge, as a point to point link has several
> applications on each side competing for the pipe at a given moment.
>
> -John Gildred
> Vice President of Engineering
> Pioneer Research Center USA
> A Division of Pioneer Electronics
> 101 Metro Drive, Suite 264
> San Jose, California 95110
> john@pioneer-pra.com
> (408) 437-1800 x105
> (408) 437-1717 Fax
> (510) 295-7770 Mobile
>