----- Original Message -----
Sent: Thursday, November 11, 2004 7:13
PM
Subject: Re: [RE] Stream identification
at the MAC SAP
Have you revised the documents of the IEEE
802.9 ISOCHRONOUS LANs?
This Working Group, now disbanded, developed
standards for Isochronous LANs, called “Iso-Ethernet”, which combines the
properties of IEE 802 LAN and ISDN networks (Plesiochronous Digital
Hierarchy). I believe that they can have interesting information, since they
developed an isochronous system of local network.
With
respect to the second question, the protocol able to identify data streams is
the LLC type 2 (802.3), by means
of the P/F bit.
Jose Morales Barroso
jmb@ieee.org
----- Original Message -----
Sent: Thursday, November 11, 2004 12:33
AM
Subject: [RE] Stream identification at
the MAC SAP
I have a general question on the MAC-SAP interface for
RE. All 802 standards are required to support the 802.2
interface. The 802.2 interface does not provide a way of identifying
an isochronous stream to the MAC at the MAC SAP. When 802.2 was up for
reconfirmation last year I suggested that they add a stream identification
parameter that could be used for protocols that provide isochronous services
like 802.15.3 or now 802.3 RE. 802.2 rejected the comment.
Has anyone given a thought to how streams would be
identified at the MAC-SAP? Would there be optional parameters added
beyond those provided by the 802.2 interface? The current parameters
from 802.3 are listed here:
MA-UNITDATA request (
source_address,
destination_address,
routing_information,
data,
priority,
service_class
)
and from 802.3:
MA_DATA.request (
destination_address,
source_address,
m_sdu,
service_class
)
Thanks.
Bill