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Dear colleagues, Attached please find an alternative (and more detailed) proposal for PLC framing. I identified a number of areas that will need more discussion, primarily associated with selection of PLC FEC and PLC CRC, PLC SFD sequence, as well as decision on whether individual PLCS data frames are fixed or variable size. I also included proposal for the internal structure, addressing, and flexible data access mechanism, allowing for OAM-like behavior over the PLC, while allowing for direct addressing of individual registers (and bits within the register) together with chained sequential read/write operations. I would like to ask for feedback before the call so that the proposal can be further polished and then hopefully discussed in more detail on the call next week Please note that I do not discuss any PLC PMD related topics, including mapping into carriers, etc. I believe these should be discussed in parallel, to simplify detection of PLC SFD. For example, PLC SFD should start always in a known subcarrier relative to the start of the PLC channel, so that the data decoder can optimize the search mechanism to limit acquisition time. It is just a thought, but I believe we should not be discussing digital PLC and OFDM PLC parts separately. 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) From: Marek Hajduczenia [mailto:marek.hajduczenia@xxxxxx] Sent: Wednesday, 03 April, 2013 11:26 PM To: STDS-802-3-EPOC@xxxxxxxxxxxxxxxxx Subject: Re: [STDS-802-3-EPOC] PHY Link Ad Hoc Notes Ed, et al., Since it is not recorded in the minutes, but it was brought up on the call, I feel it is important enough to bring it up again. I would really appreciate if there were no more surprise presentations brought forward for discussion. It is hard enough to have to examine proposals on the fly on a small screen, written in minuscule font, but it is also wasteful in terms of time to have to formulate opinions on complex topics like PLC, its framing etc., on the fly. I think we would be better served being able to preview the presentations before the meeting. With that said, I plan to develop an alternative framing proposal for the next call and distribute the draft presentation by next Monday. I would encourage everybody to follow similar approach and give other participants at least one working day to go through the materials ahead of the call. 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) From: Ed (Edward) Boyd [mailto:ed.boyd@xxxxxxxxxxxx] Sent: Wednesday, 03 April, 2013 9:31 PM To: STDS-802-3-EPOC@xxxxxxxxxxxxxxxxx Subject: [STDS-802-3-EPOC] PHY Link Ad Hoc Notes All, I have attached the slides from today?s call. Here is the a summary of the call. 1) Editor for PLC a. Most of PLC will be in the PCS and handled by Marek (digital and framing) b. Saif/Joe will handle the rest of it in the PMA. 2) Huawei and Broadcom presented a Downstream Command Format proposal (at the end of the slides) a. Efficient method to set blocks of configuration registers in the PHY. b. Marek has concerns about errors in the PLC and impact to incrementing address. c. Do we need to have FEC and CRC in PLC? Do we need to worry about undetected errors multiplying? d. Qualcomm wants to consider no address and a fixed register set for PLC. 3) Baseline Proposal Review (slides 34-35) a. One or more PLCs in the downstream is not clear. b. 1MHz granularity for setting PLC location c. General support for 6MHz min size of EPoC spectrum around PLC. Question on whether it could be 24MHz? d. PLC hunting is a vendor specific algorithm but MDIO controls needs to be define. Bill K will make presentation. e. 8 or 16 carriers for PLC are adjacent. Thanks, Ed? Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: cid:image009.jpg@01CD505E.7B800DB0 Edward Boyd | Sr Technical Director Broadcom Corporation | (O) 707-792-9008 | (M) 707-478-1146 <http://www.linkedin.com/company/broadcom> Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: image005 <http://twitter.com/#!/broadcom> Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: image002 <https://www.facebook.com/Broadcom> Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: image003 <https://plus.google.com/109188783526874806673/posts#109188783526874806673/p osts> Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: image004 <https://www.youtube.com/user/BroadcomCorporation> Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: image006 <http://blog.broadcom.com/> Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: image008 <http://broadcom.com/> Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: Description: image007 _____ <="" p=""> _____ <="" p=""> ________________________________________________________________________ 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:
PLC Frame Structure R01.pdf
Description: PLC Frame Structure R01.pdf