Re: [RPRWG] Delays in physical layers
Raj, thank you for bringing up an excellent question. We still have to see
the modeling of our standard to understand what performance is implied by
our algorithms and by the way we expect the hardware to be built. Certainly
the answer to your questions is one component of this required modeling.
Best regards,
Robert D. Love
President, Resilient Packet Ring Alliance
President, LAN Connect Consultants
7105 Leveret Circle Raleigh, NC 27615
Phone: 919 848-6773 Mobile: 919 810-7816
email: rdlove@xxxxxxxx Fax: 208 978-1187
----- Original Message -----
From: <raj@xxxxxxxxxxxx>
To: <stds-802-17@xxxxxxxx>
Sent: Wednesday, November 20, 2002 5:52 PM
Subject: [RPRWG] Delays in physical layers
I would like to know if anyone can shed some light on
the different delays through the various physical layers
chosen for RPR.
The delay would the time it takes for a MAC to receive the first byte
of a frame from the physical layer after the first byte is handed
from the upstream MAC to its physical layer.
The PHYs in interest are:
GFP/SONET
POS/SONET
64b66b/SONET (WIS)
I am assuming that the delays in the PHY have two components.
One associated with frame delineation and other with SONET framing.
What would be the magnitude of these delays ? milliseconds ?
microseconds? Would it interfere with any of the protection
or fairness schemes?
raj