Thread Links Date Links
Thread Prev Thread Next Thread Index Date Prev Date Next Date Index

Re: [STDS-802-3-EPOC] Additional Eval Criteria item to support ToD (time of day) delivery for Mobile Backhaul

Bill,

               I added that as a possible evaluation criteria.  I also include the changes we made this morning.

Steve

From: Bill Powell [mailto:bill.powell@xxxxxxxxxxxxxxxxxx]
Sent: Thursday, January 24, 2013 8:18 AM
To: Shellhammer, Steve; STDS-802-3-EPOC@xxxxxxxxxxxxxxxxx
Subject: Additional Eval Criteria item to support ToD (time of day) delivery for Mobile Backhaul

Hi Steve,
Related to the Eval criteria delay items that we currently have in the Eval Criteria table, I don't think this will adequately capture an Eval criteria that will meet the needs of Moble BackHaul synchronization for EPoC.  I'd like to suggest adding the following additional Eval Criteria item, based on my EPoC Synchronization transport presentation from the Phoenix meeting:

Design  to support a time transfer error performance of +/-120 ns or less from the CLT MAC/PLS to the CNU MAC/PLS

There are a  number of ways this can be met:
- Fixed & equal delay from MAC/PLS to the Medium and the Medium to MAC/PLS   (but a not likely case)
- Equal TX / RX delay to/from the MAC/PLS interface to/from the medium
- Reportable time delay across the PHY layers to a known level of precision in each direction
    (may depend on configured OFDM, FEC, and interleaving configured parameters)
- Others?

I'm open to adjusting this number - up or down (preferable)  as we move forward with choices of PHY parameters and reference models.  Our competition (GPON, DOCSIS, P2P Ethernet) is currently doing much better than this performance level.

Comments welcome...

Regards,
Bill



--



Bill Powell

Alcatel-Lucent

Fixed Access Systems Engineering

2301 Sugar Bush Road

Raleigh, NC 27612

bill.powell@xxxxxxxxxxxxxxxxxx<mailto:bill.powell@xxxxxxxxxxxxxxxxxx>

(O)    919-850-6462

(Cell) 919-614-3225

________________________________________________________________________

To unsubscribe from the STDS-802-3-EPOC list, click the following link:
https://listserv.ieee.org/cgi-bin/wa?SUBED1=STDS-802-3-EPOC&A=1

Attachment: Evaluation Criteria and Requirement Open Issues R4.docx
Description: Evaluation Criteria and Requirement Open Issues R4.docx