Re: [STDS-802-3-EPOC] Line coding for EPoC
Marek:
I see no reason to change the 64b/66b line code in PCS, so I'll vote to keep it in EPoC.
In "repeater" architecture, the 64b/66b line code can NOT be changed for CNU and ONU co-existing. In "bridge"/"double scheduling" architecture, one could choose a different line code in principle, but there is no reason to do so.
Thanks,
Eugene
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From: Marek Hajduczenia [marek.hajduczenia@xxxxxx]
Sent: Thursday, March 07, 2013 5:31 AM
To: STDS-802-3-EPOC@xxxxxxxxxxxxxxxxx
Subject: [STDS-802-3-EPOC] Line coding for EPoC
Dear colleagues,
I prepared a presentation (as attached) focusing on the topic of line coding for EPoC, why it is needed and what our options are looking at other existing Ethernet standards. I also included overview of 64b/66b line code with some details so that people can start thinking about this topic. My belief is that we can reuse 64b/66b line coding in EPoC to guarantee good code-word alignment and have to do absolutely nothing to develop a new line code for EPoC. The same approach was taken in 10G-EPON and worked just great – no development errors were committed, and companies could just reuse their existing implementations from 10GE and other high speed Ethernet PHYs.
The decision on the line code is important, since the selection of the line code influences other choices, including the FEC code word size, mapping of individual data vectors into the FEC code word, as well as the following OFDM symbol size.
I plan to submit this contribution to the upcoming meeting in Orlando and I would appreciate your feedback and comments ahead of time.
Thank you in advance
regards
Marek Hajduczenia, PhD
ZTE Portugal
Standard Development and Industry Relations
Edifício Amoreiras Plaza,
Rua Carlos Alberto da Mota Pinto, nr. 9 - 6 A,
1070-374 Lisbon, Portugal
Office: +351 213 700 090
Fax: + 351 213 813 349
Mobile: +351 961 121 851 (Portugal)
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