[802.3_MAINT] 802.3 Maintenance Request To Be Considered Tomorrow

[Wael Diab <wdiab@xxxxxxxxxxxx>]

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|                    8802-3/802.3 REVISION REQUEST                     |
+--------------------=============================---------------------+
DATE:  July 10/2008
NAME:  Jeff Mandin
COMPANY/AFFILIATION:  PMC-Sierra
E-MAIL: jeff_mandin@xxxxxxxxxxxxxx

REQUESTED REVISION:
  STANDARD: 802.3as-2006
  CLAUSE NUMBER: 64
  CLAUSE TITLE: Multipoint MAC Control
PROPOSED REVISION TEXT:

Revise text in figures 64-12 and 64-13 in accordance with the attached
figures.

RATIONALE FOR REVISION:

The state diagrams relied on the particular behaviour of the
TransmitFrame() primitive  -
 ie. that it completes after the final bit has been transferred to the
PHY.  802.3as-2006
replaced the invocations of TransmitFrame() with MA_DATA.Request() -
which
completes without delay.

But 802.3as-2006 did not correspondingly update the transmission backoff
timer, which
must now compensate for the fact that the primitive returns immediately.
Consequently,
in each of the 4 places where "packet_initiate_delay" is calculated, the
term
"round_up((length+tailGuard) / 2)" must be added.  This value
corresponds to the duration
Of the TransmitFrame() primitive.

IMPACT ON EXISTING NETWORKS:

This change restores the text to conform to the behaviour of 802.3-2005
which is the
 behaviour followed by all deployed EPON devices.

+----------------------------------------------------------------------+
|Please attach supporting material, if any                             |
|Submit to:-   David Law, Chair IEEE 802.3                             |
|              E-Mail: David_Law@xxxxxxxx                              |
|                                                                      |
|             +------- For official 802.3 use -----------+             |
|             |  REV REQ NUMBER: XXXX                    |             |
|             |  DATE RECEIVED: Xxx Xxx, 200X            |             |
|             |  EDITORIAL/TECHNICAL                     |             |
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|             |  COMMENTS:                               |             |
+-------------+------------------------------------------+-------------+
| For information about this Revision Request see -                    |
|http://www.ieee802.org/3/maint/requests/revision_history.html#REQ10XX |
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(See attached file: fig64-12.pdf)
(See attached file: fig64-13.pdf)

Attachment: fig64-12.pdf
Description: fig64-12.pdf

Attachment: fig64-13.pdf
Description: fig64-13.pdf